コード例 #1
0
class TokenInputGUI(object):
    def show_entry_fields(self, event=None):
        self.code = self.e1.get()
        self.master.withdraw()
        self.master.quit()

    def quit(self):
        self.master.quit()
        self.code = None

    def doGUI(self, hostname=None):
        self.master = Tk()
        self.master.title('Blessclient - MFA')
        textmsg = 'Enter your AWS MFA code: '
        if hostname:
            textmsg = 'Enter your AWS MFA code to connect to {}: '.format(
                hostname)
        Label(self.master, text=textmsg).grid(row=0)
        self.e1 = Entry(self.master)
        self.e1.grid(row=0, column=1, padx=4)
        Button(self.master,
               text='OK',
               command=self.show_entry_fields,
               default=ACTIVE).grid(row=3, column=0, sticky=W, pady=4)
        Button(self.master, text='Cancel', command=self.quit).grid(row=3,
                                                                   column=1,
                                                                   sticky=W,
                                                                   pady=4)

        self.center()
        self.master.bind('<Return>', self.show_entry_fields)
        self.master.lift()
        self.master.attributes('-topmost', True)
        self.master.focus_force()
        self.e1.focus_set()

        if platform.system() == 'Darwin':
            # Hack to get the GUI dialog focused in OSX
            # https://stackoverflow.com/questions/1892339/how-to-make-a-tkinter-window-jump-to-the-front/37235492#37235492
            tmpl = 'tell application "System Events" to set frontmost of every process whose unix id is {} to true'
            script = tmpl.format(os.getpid())
            subprocess.check_call(['/usr/bin/osascript', '-e', script])

        mainloop()

    # http://stackoverflow.com/questions/3352918/how-to-center-a-window-on-the-screen-in-tkinter
    def center(self):
        self.master.update_idletasks()
        w = self.master.winfo_screenwidth()
        h = self.master.winfo_screenheight()
        size = tuple(
            int(_) for _ in self.master.geometry().split('+')[0].split('x'))
        x = w / 2 - size[0] / 2
        y = h / 2 - size[1] / 2
        self.master.geometry("%dx%d+%d+%d" % (size + (x, y)))
コード例 #2
0
ファイル: concordance_app.py プロジェクト: wurentidai/nltk
class ConcordanceSearchView(object):
    _BACKGROUND_COLOUR = '#FFF'  #white

    #Colour of highlighted results
    _HIGHLIGHT_WORD_COLOUR = '#F00'  #red
    _HIGHLIGHT_WORD_TAG = 'HL_WRD_TAG'

    _HIGHLIGHT_LABEL_COLOUR = '#C0C0C0'  # dark grey
    _HIGHLIGHT_LABEL_TAG = 'HL_LBL_TAG'

    #Percentage of text left of the scrollbar position
    _FRACTION_LEFT_TEXT = 0.30

    def __init__(self):
        self.queue = q.Queue()
        self.model = ConcordanceSearchModel(self.queue)
        self.top = Tk()
        self._init_top(self.top)
        self._init_menubar()
        self._init_widgets(self.top)
        self.load_corpus(self.model.DEFAULT_CORPUS)
        self.after = self.top.after(POLL_INTERVAL, self._poll)

    def _init_top(self, top):
        top.geometry('950x680+50+50')
        top.title('NLTK Concordance Search')
        top.bind('<Control-q>', self.destroy)
        top.protocol('WM_DELETE_WINDOW', self.destroy)
        top.minsize(950, 680)

    def _init_widgets(self, parent):
        self.main_frame = Frame(
            parent,
            dict(background=self._BACKGROUND_COLOUR, padx=1, pady=1, border=1))
        self._init_corpus_select(self.main_frame)
        self._init_query_box(self.main_frame)
        self._init_results_box(self.main_frame)
        self._init_paging(self.main_frame)
        self._init_status(self.main_frame)
        self.main_frame.pack(fill='both', expand=True)

    def _init_menubar(self):
        self._result_size = IntVar(self.top)
        self._cntx_bf_len = IntVar(self.top)
        self._cntx_af_len = IntVar(self.top)
        menubar = Menu(self.top)

        filemenu = Menu(menubar, tearoff=0, borderwidth=0)
        filemenu.add_command(label='Exit',
                             underline=1,
                             command=self.destroy,
                             accelerator='Ctrl-q')
        menubar.add_cascade(label='File', underline=0, menu=filemenu)

        editmenu = Menu(menubar, tearoff=0)
        rescntmenu = Menu(editmenu, tearoff=0)
        rescntmenu.add_radiobutton(label='20',
                                   variable=self._result_size,
                                   underline=0,
                                   value=20,
                                   command=self.set_result_size)
        rescntmenu.add_radiobutton(label='50',
                                   variable=self._result_size,
                                   underline=0,
                                   value=50,
                                   command=self.set_result_size)
        rescntmenu.add_radiobutton(label='100',
                                   variable=self._result_size,
                                   underline=0,
                                   value=100,
                                   command=self.set_result_size)
        rescntmenu.invoke(1)
        editmenu.add_cascade(label='Result Count',
                             underline=0,
                             menu=rescntmenu)

        cntxmenu = Menu(editmenu, tearoff=0)
        cntxbfmenu = Menu(cntxmenu, tearoff=0)
        cntxbfmenu.add_radiobutton(label='60 characters',
                                   variable=self._cntx_bf_len,
                                   underline=0,
                                   value=60,
                                   command=self.set_cntx_bf_len)
        cntxbfmenu.add_radiobutton(label='80 characters',
                                   variable=self._cntx_bf_len,
                                   underline=0,
                                   value=80,
                                   command=self.set_cntx_bf_len)
        cntxbfmenu.add_radiobutton(label='100 characters',
                                   variable=self._cntx_bf_len,
                                   underline=0,
                                   value=100,
                                   command=self.set_cntx_bf_len)
        cntxbfmenu.invoke(1)
        cntxmenu.add_cascade(label='Before', underline=0, menu=cntxbfmenu)

        cntxafmenu = Menu(cntxmenu, tearoff=0)
        cntxafmenu.add_radiobutton(label='70 characters',
                                   variable=self._cntx_af_len,
                                   underline=0,
                                   value=70,
                                   command=self.set_cntx_af_len)
        cntxafmenu.add_radiobutton(label='90 characters',
                                   variable=self._cntx_af_len,
                                   underline=0,
                                   value=90,
                                   command=self.set_cntx_af_len)
        cntxafmenu.add_radiobutton(label='110 characters',
                                   variable=self._cntx_af_len,
                                   underline=0,
                                   value=110,
                                   command=self.set_cntx_af_len)
        cntxafmenu.invoke(1)
        cntxmenu.add_cascade(label='After', underline=0, menu=cntxafmenu)

        editmenu.add_cascade(label='Context', underline=0, menu=cntxmenu)

        menubar.add_cascade(label='Edit', underline=0, menu=editmenu)

        self.top.config(menu=menubar)

    def set_result_size(self, **kwargs):
        self.model.result_count = self._result_size.get()

    def set_cntx_af_len(self, **kwargs):
        self._char_after = self._cntx_af_len.get()

    def set_cntx_bf_len(self, **kwargs):
        self._char_before = self._cntx_bf_len.get()

    def _init_corpus_select(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        self.var = StringVar(innerframe)
        self.var.set(self.model.DEFAULT_CORPUS)
        Label(innerframe,
              justify=LEFT,
              text=' Corpus: ',
              background=self._BACKGROUND_COLOUR,
              padx=2,
              pady=1,
              border=0).pack(side='left')

        other_corpora = list(self.model.CORPORA.keys()).remove(
            self.model.DEFAULT_CORPUS)
        om = OptionMenu(innerframe,
                        self.var,
                        self.model.DEFAULT_CORPUS,
                        command=self.corpus_selected,
                        *self.model.non_default_corpora())
        om['borderwidth'] = 0
        om['highlightthickness'] = 1
        om.pack(side='left')
        innerframe.pack(side='top', fill='x', anchor='n')

    def _init_status(self, parent):
        self.status = Label(parent,
                            justify=LEFT,
                            relief=SUNKEN,
                            background=self._BACKGROUND_COLOUR,
                            border=0,
                            padx=1,
                            pady=0)
        self.status.pack(side='top', anchor='sw')

    def _init_query_box(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        another = Frame(innerframe, background=self._BACKGROUND_COLOUR)
        self.query_box = Entry(another, width=60)
        self.query_box.pack(side='left', fill='x', pady=25, anchor='center')
        self.search_button = Button(another,
                                    text='Search',
                                    command=self.search,
                                    borderwidth=1,
                                    highlightthickness=1)
        self.search_button.pack(side='left',
                                fill='x',
                                pady=25,
                                anchor='center')
        self.query_box.bind('<KeyPress-Return>',
                            self.search_enter_keypress_handler)
        another.pack()
        innerframe.pack(side='top', fill='x', anchor='n')

    def search_enter_keypress_handler(self, *event):
        self.search()

    def _init_results_box(self, parent):
        innerframe = Frame(parent)
        i1 = Frame(innerframe)
        i2 = Frame(innerframe)
        vscrollbar = Scrollbar(i1, borderwidth=1)
        hscrollbar = Scrollbar(i2, borderwidth=1, orient='horiz')
        self.results_box = Text(i1,
                                font=Font(family='courier', size='16'),
                                state='disabled',
                                borderwidth=1,
                                yscrollcommand=vscrollbar.set,
                                xscrollcommand=hscrollbar.set,
                                wrap='none',
                                width='40',
                                height='20',
                                exportselection=1)
        self.results_box.pack(side='left', fill='both', expand=True)
        self.results_box.tag_config(self._HIGHLIGHT_WORD_TAG,
                                    foreground=self._HIGHLIGHT_WORD_COLOUR)
        self.results_box.tag_config(self._HIGHLIGHT_LABEL_TAG,
                                    foreground=self._HIGHLIGHT_LABEL_COLOUR)
        vscrollbar.pack(side='left', fill='y', anchor='e')
        vscrollbar.config(command=self.results_box.yview)
        hscrollbar.pack(side='left', fill='x', expand=True, anchor='w')
        hscrollbar.config(command=self.results_box.xview)
        #there is no other way of avoiding the overlap of scrollbars while using pack layout manager!!!
        Label(i2, text='   ',
              background=self._BACKGROUND_COLOUR).pack(side='left', anchor='e')
        i1.pack(side='top', fill='both', expand=True, anchor='n')
        i2.pack(side='bottom', fill='x', anchor='s')
        innerframe.pack(side='top', fill='both', expand=True)

    def _init_paging(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        self.prev = prev = Button(innerframe,
                                  text='Previous',
                                  command=self.previous,
                                  width='10',
                                  borderwidth=1,
                                  highlightthickness=1,
                                  state='disabled')
        prev.pack(side='left', anchor='center')
        self.next = next = Button(innerframe,
                                  text='Next',
                                  command=self.__next__,
                                  width='10',
                                  borderwidth=1,
                                  highlightthickness=1,
                                  state='disabled')
        next.pack(side='right', anchor='center')
        innerframe.pack(side='top', fill='y')
        self.current_page = 0

    def previous(self):
        self.clear_results_box()
        self.freeze_editable()
        self.model.prev(self.current_page - 1)

    def __next__(self):
        self.clear_results_box()
        self.freeze_editable()
        self.model.next(self.current_page + 1)

    def about(self, *e):
        ABOUT = ("NLTK Concordance Search Demo\n")
        TITLE = 'About: NLTK Concordance Search Demo'
        try:
            from six.moves.tkinter_messagebox import Message
            Message(message=ABOUT, title=TITLE, parent=self.main_frame).show()
        except:
            ShowText(self.top, TITLE, ABOUT)

    def _bind_event_handlers(self):
        self.top.bind(CORPUS_LOADED_EVENT, self.handle_corpus_loaded)
        self.top.bind(SEARCH_TERMINATED_EVENT, self.handle_search_terminated)
        self.top.bind(SEARCH_ERROR_EVENT, self.handle_search_error)
        self.top.bind(ERROR_LOADING_CORPUS_EVENT,
                      self.handle_error_loading_corpus)

    def _poll(self):
        try:
            event = self.queue.get(block=False)
        except q.Empty:
            pass
        else:
            if event == CORPUS_LOADED_EVENT:
                self.handle_corpus_loaded(event)
            elif event == SEARCH_TERMINATED_EVENT:
                self.handle_search_terminated(event)
            elif event == SEARCH_ERROR_EVENT:
                self.handle_search_error(event)
            elif event == ERROR_LOADING_CORPUS_EVENT:
                self.handle_error_loading_corpus(event)
        self.after = self.top.after(POLL_INTERVAL, self._poll)

    def handle_error_loading_corpus(self, event):
        self.status['text'] = 'Error in loading ' + self.var.get()
        self.unfreeze_editable()
        self.clear_all()
        self.freeze_editable()

    def handle_corpus_loaded(self, event):
        self.status['text'] = self.var.get() + ' is loaded'
        self.unfreeze_editable()
        self.clear_all()
        self.query_box.focus_set()

    def handle_search_terminated(self, event):
        #todo: refactor the model such that it is less state sensitive
        results = self.model.get_results()
        self.write_results(results)
        self.status['text'] = ''
        if len(results) == 0:
            self.status['text'] = 'No results found for ' + self.model.query
        else:
            self.current_page = self.model.last_requested_page
        self.unfreeze_editable()
        self.results_box.xview_moveto(self._FRACTION_LEFT_TEXT)

    def handle_search_error(self, event):
        self.status['text'] = 'Error in query ' + self.model.query
        self.unfreeze_editable()

    def corpus_selected(self, *args):
        new_selection = self.var.get()
        self.load_corpus(new_selection)

    def load_corpus(self, selection):
        if self.model.selected_corpus != selection:
            self.status['text'] = 'Loading ' + selection + '...'
            self.freeze_editable()
            self.model.load_corpus(selection)

    def search(self):
        self.current_page = 0
        self.clear_results_box()
        self.model.reset_results()
        query = self.query_box.get()
        if (len(query.strip()) == 0): return
        self.status['text'] = 'Searching for ' + query
        self.freeze_editable()
        self.model.search(
            query,
            self.current_page + 1,
        )

    def write_results(self, results):
        self.results_box['state'] = 'normal'
        row = 1
        for each in results:
            sent, pos1, pos2 = each[0].strip(), each[1], each[2]
            if len(sent) != 0:
                if (pos1 < self._char_before):
                    sent, pos1, pos2 = self.pad(sent, pos1, pos2)
                sentence = sent[pos1 - self._char_before:pos1 +
                                self._char_after]
                if not row == len(results):
                    sentence += '\n'
                self.results_box.insert(str(row) + '.0', sentence)
                word_markers, label_markers = self.words_and_labels(
                    sent, pos1, pos2)
                for marker in word_markers:
                    self.results_box.tag_add(self._HIGHLIGHT_WORD_TAG,
                                             str(row) + '.' + str(marker[0]),
                                             str(row) + '.' + str(marker[1]))
                for marker in label_markers:
                    self.results_box.tag_add(self._HIGHLIGHT_LABEL_TAG,
                                             str(row) + '.' + str(marker[0]),
                                             str(row) + '.' + str(marker[1]))
                row += 1
        self.results_box['state'] = 'disabled'

    def words_and_labels(self, sentence, pos1, pos2):
        search_exp = sentence[pos1:pos2]
        words, labels = [], []
        labeled_words = search_exp.split(' ')
        index = 0
        for each in labeled_words:
            if each == '':
                index += 1
            else:
                word, label = each.split('/')
                words.append((self._char_before + index,
                              self._char_before + index + len(word)))
                index += len(word) + 1
                labels.append((self._char_before + index,
                               self._char_before + index + len(label)))
                index += len(label)
            index += 1
        return words, labels

    def pad(self, sent, hstart, hend):
        if hstart >= self._char_before:
            return sent, hstart, hend
        d = self._char_before - hstart
        sent = ''.join([' '] * d) + sent
        return sent, hstart + d, hend + d

    def destroy(self, *e):
        if self.top is None: return
        self.top.after_cancel(self.after)
        self.top.destroy()
        self.top = None

    def clear_all(self):
        self.query_box.delete(0, END)
        self.model.reset_query()
        self.clear_results_box()

    def clear_results_box(self):
        self.results_box['state'] = 'normal'
        self.results_box.delete("1.0", END)
        self.results_box['state'] = 'disabled'

    def freeze_editable(self):
        self.query_box['state'] = 'disabled'
        self.search_button['state'] = 'disabled'
        self.prev['state'] = 'disabled'
        self.next['state'] = 'disabled'

    def unfreeze_editable(self):
        self.query_box['state'] = 'normal'
        self.search_button['state'] = 'normal'
        self.set_paging_button_states()

    def set_paging_button_states(self):
        if self.current_page == 0 or self.current_page == 1:
            self.prev['state'] = 'disabled'
        else:
            self.prev['state'] = 'normal'
        if self.model.has_more_pages(self.current_page):
            self.next['state'] = 'normal'
        else:
            self.next['state'] = 'disabled'

    def fire_event(self, event):
        #Firing an event so that rendering of widgets happen in the mainloop thread
        self.top.event_generate(event, when='tail')

    def mainloop(self, *args, **kwargs):
        if in_idle(): return
        self.top.mainloop(*args, **kwargs)
コード例 #3
0
class LoginDialog(object):
    def __init__(self, host):
        self.__interna_init()
        self.__host = host
        self.__initialized = False
        if TKTk is not None:
            self.__create_content()
            self.__initialized = True

    def __interna_init(self):
        self.__rootFrame = None
        self.__top = None
        self.__usrEntry = None
        self.__pwdEntry = None
        self.__accepted = False
        self.__host = None
        self.__usr = None
        self.__pwd = None

    def __cancel_action(self):
        self.__accepted = False
        self.__rootFrame.destroy()

    def __login_action(self):
        self.__accepted = True
        self.__usr = self.__usrEntry.get()
        self.__pwd = self.__pwdEntry.get()
        self.__rootFrame.destroy()

    def __enter_action(self, event):
        self.__login_action()

    def __create_content(self):
        self.__rootFrame = TKTk()
        self.__rootFrame.withdraw()

        self.__top = TKToplevel(self.__rootFrame)
        self.__top.title("Login")
        self.__top.protocol("WM_DELETE_WINDOW", self.__rootFrame.destroy)

        self.__top.bind('<Return>', self.__enter_action)

        self.__top.update_idletasks()
        width = self.__top.winfo_width()
        height = self.__top.winfo_height()
        x = (self.__top.winfo_screenwidth() // 2) - (width // 2)
        y = (self.__top.winfo_screenheight() // 2) - (height // 2)

        self.__top.geometry("+%d+%d" % (x, y))

        row = 0
        expLabel = TKLabel(self.__top, text='Login to host:')
        expLabel.grid(row=row, column=0, columnspan=4, padx=5, pady=2)

        row = row + 1
        urlLabel = TKLabel(self.__top, text=self.__host)
        urlLabel.grid(row=row, column=0, columnspan=4, padx=5, pady=2)

        row = row + 1
        usrLabel = TKLabel(self.__top, text='User')
        usrLabel.grid(row=row, column=0, columnspan=2, padx=20, pady=5)
        self.__usrEntry = TKEntry(self.__top, width=20)
        self.__usrEntry.grid(row=row, column=2, columnspan=2, padx=5, pady=5)

        row = row + 1
        pwdLabel = TKLabel(self.__top, text='Password')
        pwdLabel.grid(row=row, column=0, columnspan=2, padx=20, pady=5)
        self.__pwdEntry = TKEntry(self.__top, width=20, show="*")
        self.__pwdEntry.grid(row=row, column=2, columnspan=2, padx=5, pady=5)

        row = row + 1
        cancelButton = TKButton(self.__top,
                                text='Cancel',
                                command=self.__cancel_action)
        cancelButton.grid(row=row, column=1, padx=5, pady=5)
        loginButton = TKButton(self.__top,
                               text='Login',
                               command=self.__login_action)
        loginButton.grid(row=row, column=2, padx=5, pady=5)

    def show_login(self):
        if self.__initialized:
            self.__usrEntry.focus_set()
            self.__rootFrame.mainloop()
        else:
            print("tkinter python module is not available.\n\
            Please, install tkinter module or use command line login utility.")

    def is_accepted(self):
        return self.__accepted

    def get_user(self):
        return self.__usr

    def get_password(self):
        return self.__pwd
コード例 #4
0
ファイル: gui.py プロジェクト: 173210/depot_tools
class LintGui(object):
    """Build and control a window to interact with pylint"""

    def __init__(self, root=None):
        """init"""
        self.root = root or Tk()
        self.root.title('Pylint')
        #reporter
        self.reporter = None
        #message queue for output from reporter
        self.msg_queue = six.moves.queue.Queue()
        self.msgs = []
        self.visible_msgs = []
        self.filenames = []
        self.rating = StringVar()
        self.tabs = {}
        self.report_stream = BasicStream(self)
        #gui objects
        self.lb_messages = None
        self.showhistory = None
        self.results = None
        self.btnRun = None
        self.information_box = None
        self.convention_box = None
        self.refactor_box = None
        self.warning_box = None
        self.error_box = None
        self.fatal_box = None
        self.txtModule = None
        self.status = None
        self.msg_type_dict = None
        self.init_gui()

    def init_gui(self):
        """init helper"""

        window = PanedWindow(self.root, orient="vertical")
        window.pack(side=TOP, fill=BOTH, expand=True)

        top_pane = Frame(window)
        window.add(top_pane)
        mid_pane = Frame(window)
        window.add(mid_pane)
        bottom_pane = Frame(window)
        window.add(bottom_pane)

        #setting up frames
        top_frame = Frame(top_pane)
        mid_frame = Frame(top_pane)
        history_frame = Frame(top_pane)
        radio_frame = Frame(mid_pane)
        rating_frame = Frame(mid_pane)
        res_frame = Frame(mid_pane)
        check_frame = Frame(bottom_pane)
        msg_frame = Frame(bottom_pane)
        btn_frame = Frame(bottom_pane)
        top_frame.pack(side=TOP, fill=X)
        mid_frame.pack(side=TOP, fill=X)
        history_frame.pack(side=TOP, fill=BOTH, expand=True)
        radio_frame.pack(side=TOP, fill=X)
        rating_frame.pack(side=TOP, fill=X)
        res_frame.pack(side=TOP, fill=BOTH, expand=True)
        check_frame.pack(side=TOP, fill=X)
        msg_frame.pack(side=TOP, fill=BOTH, expand=True)
        btn_frame.pack(side=TOP, fill=X)

        # Binding F5 application-wide to run lint
        self.root.bind('<F5>', self.run_lint)

        #Message ListBox
        rightscrollbar = Scrollbar(msg_frame)
        rightscrollbar.pack(side=RIGHT, fill=Y)
        bottomscrollbar = Scrollbar(msg_frame, orient=HORIZONTAL)
        bottomscrollbar.pack(side=BOTTOM, fill=X)
        self.lb_messages = Listbox(
            msg_frame,
            yscrollcommand=rightscrollbar.set,
            xscrollcommand=bottomscrollbar.set,
            bg="white")
        self.lb_messages.bind("<Double-Button-1>", self.show_sourcefile)
        self.lb_messages.pack(expand=True, fill=BOTH)
        rightscrollbar.config(command=self.lb_messages.yview)
        bottomscrollbar.config(command=self.lb_messages.xview)

        #History ListBoxes
        rightscrollbar2 = Scrollbar(history_frame)
        rightscrollbar2.pack(side=RIGHT, fill=Y)
        bottomscrollbar2 = Scrollbar(history_frame, orient=HORIZONTAL)
        bottomscrollbar2.pack(side=BOTTOM, fill=X)
        self.showhistory = Listbox(
            history_frame,
            yscrollcommand=rightscrollbar2.set,
            xscrollcommand=bottomscrollbar2.set,
            bg="white")
        self.showhistory.pack(expand=True, fill=BOTH)
        rightscrollbar2.config(command=self.showhistory.yview)
        bottomscrollbar2.config(command=self.showhistory.xview)
        self.showhistory.bind('<Double-Button-1>', self.select_recent_file)
        self.set_history_window()

        #status bar
        self.status = Label(self.root, text="", bd=1, relief=SUNKEN, anchor=W)
        self.status.pack(side=BOTTOM, fill=X)

        #labelbl_ratingls
        lbl_rating_label = Label(rating_frame, text='Rating:')
        lbl_rating_label.pack(side=LEFT)
        lbl_rating = Label(rating_frame, textvariable=self.rating)
        lbl_rating.pack(side=LEFT)
        Label(mid_frame, text='Recently Used:').pack(side=LEFT)
        Label(top_frame, text='Module or package').pack(side=LEFT)

        #file textbox
        self.txt_module = Entry(top_frame, background='white')
        self.txt_module.bind('<Return>', self.run_lint)
        self.txt_module.pack(side=LEFT, expand=True, fill=X)

        #results box
        rightscrollbar = Scrollbar(res_frame)
        rightscrollbar.pack(side=RIGHT, fill=Y)
        bottomscrollbar = Scrollbar(res_frame, orient=HORIZONTAL)
        bottomscrollbar.pack(side=BOTTOM, fill=X)
        self.results = Listbox(
            res_frame,
            yscrollcommand=rightscrollbar.set,
            xscrollcommand=bottomscrollbar.set,
            bg="white", font="Courier")
        self.results.pack(expand=True, fill=BOTH, side=BOTTOM)
        rightscrollbar.config(command=self.results.yview)
        bottomscrollbar.config(command=self.results.xview)

        #buttons
        Button(top_frame, text='Open', command=self.file_open).pack(side=LEFT)
        Button(top_frame, text='Open Package',
               command=(lambda: self.file_open(package=True))).pack(side=LEFT)

        self.btnRun = Button(top_frame, text='Run', command=self.run_lint)
        self.btnRun.pack(side=LEFT)
        Button(btn_frame, text='Quit', command=self.quit).pack(side=BOTTOM)

        #radio buttons
        self.information_box = IntVar()
        self.convention_box = IntVar()
        self.refactor_box = IntVar()
        self.warning_box = IntVar()
        self.error_box = IntVar()
        self.fatal_box = IntVar()
        i = Checkbutton(check_frame, text="Information", fg=COLORS['(I)'],
                        variable=self.information_box, command=self.refresh_msg_window)
        c = Checkbutton(check_frame, text="Convention", fg=COLORS['(C)'],
                        variable=self.convention_box, command=self.refresh_msg_window)
        r = Checkbutton(check_frame, text="Refactor", fg=COLORS['(R)'],
                        variable=self.refactor_box, command=self.refresh_msg_window)
        w = Checkbutton(check_frame, text="Warning", fg=COLORS['(W)'],
                        variable=self.warning_box, command=self.refresh_msg_window)
        e = Checkbutton(check_frame, text="Error", fg=COLORS['(E)'],
                        variable=self.error_box, command=self.refresh_msg_window)
        f = Checkbutton(check_frame, text="Fatal", fg=COLORS['(F)'],
                        variable=self.fatal_box, command=self.refresh_msg_window)
        i.select()
        c.select()
        r.select()
        w.select()
        e.select()
        f.select()
        i.pack(side=LEFT)
        c.pack(side=LEFT)
        r.pack(side=LEFT)
        w.pack(side=LEFT)
        e.pack(side=LEFT)
        f.pack(side=LEFT)

        #check boxes
        self.box = StringVar()
        # XXX should be generated
        report = Radiobutton(
            radio_frame, text="Report", variable=self.box,
            value="Report", command=self.refresh_results_window)
        raw_met = Radiobutton(
            radio_frame, text="Raw metrics", variable=self.box,
            value="Raw metrics", command=self.refresh_results_window)
        dup = Radiobutton(
            radio_frame, text="Duplication", variable=self.box,
            value="Duplication", command=self.refresh_results_window)
        ext = Radiobutton(
            radio_frame, text="External dependencies",
            variable=self.box, value="External dependencies",
            command=self.refresh_results_window)
        stat = Radiobutton(
            radio_frame, text="Statistics by type",
            variable=self.box, value="Statistics by type",
            command=self.refresh_results_window)
        msg_cat = Radiobutton(
            radio_frame, text="Messages by category",
            variable=self.box, value="Messages by category",
            command=self.refresh_results_window)
        msg = Radiobutton(
            radio_frame, text="Messages", variable=self.box,
            value="Messages", command=self.refresh_results_window)
        source_file = Radiobutton(
            radio_frame, text="Source File", variable=self.box,
            value="Source File", command=self.refresh_results_window)
        report.select()
        report.grid(column=0, row=0, sticky=W)
        raw_met.grid(column=1, row=0, sticky=W)
        dup.grid(column=2, row=0, sticky=W)
        msg.grid(column=3, row=0, sticky=W)
        stat.grid(column=0, row=1, sticky=W)
        msg_cat.grid(column=1, row=1, sticky=W)
        ext.grid(column=2, row=1, sticky=W)
        source_file.grid(column=3, row=1, sticky=W)

        #dictionary for check boxes and associated error term
        self.msg_type_dict = {
            'I': lambda: self.information_box.get() == 1,
            'C': lambda: self.convention_box.get() == 1,
            'R': lambda: self.refactor_box.get() == 1,
            'E': lambda: self.error_box.get() == 1,
            'W': lambda: self.warning_box.get() == 1,
            'F': lambda: self.fatal_box.get() == 1
        }
        self.txt_module.focus_set()


    def select_recent_file(self, event): # pylint: disable=unused-argument
        """adds the selected file in the history listbox to the Module box"""
        if not self.showhistory.size():
            return

        selected = self.showhistory.curselection()
        item = self.showhistory.get(selected)
        #update module
        self.txt_module.delete(0, END)
        self.txt_module.insert(0, item)

    def refresh_msg_window(self):
        """refresh the message window with current output"""
        #clear the window
        self.lb_messages.delete(0, END)
        self.visible_msgs = []
        for msg in self.msgs:
            if self.msg_type_dict.get(msg.C)():
                self.visible_msgs.append(msg)
                msg_str = convert_to_string(msg)
                self.lb_messages.insert(END, msg_str)
                fg_color = COLORS.get(msg_str[:3], 'black')
                self.lb_messages.itemconfigure(END, fg=fg_color)

    def refresh_results_window(self):
        """refresh the results window with current output"""
        #clear the window
        self.results.delete(0, END)
        try:
            for res in self.tabs[self.box.get()]:
                self.results.insert(END, res)
        except KeyError:
            pass

    def process_incoming(self):
        """process the incoming messages from running pylint"""
        while self.msg_queue.qsize():
            try:
                msg = self.msg_queue.get(0)
                if msg == "DONE":
                    self.report_stream.output_contents()
                    return False

                #adding message to list of msgs
                self.msgs.append(msg)

                #displaying msg if message type is selected in check box
                if self.msg_type_dict.get(msg.C)():
                    self.visible_msgs.append(msg)
                    msg_str = convert_to_string(msg)
                    self.lb_messages.insert(END, msg_str)
                    fg_color = COLORS.get(msg_str[:3], 'black')
                    self.lb_messages.itemconfigure(END, fg=fg_color)

            except six.moves.queue.Empty:
                pass
        return True

    def periodic_call(self):
        """determine when to unlock the run button"""
        if self.process_incoming():
            self.root.after(100, self.periodic_call)
        else:
            #enabling button so it can be run again
            self.btnRun.config(state=NORMAL)

    def mainloop(self):
        """launch the mainloop of the application"""
        self.root.mainloop()

    def quit(self, _=None):
        """quit the application"""
        self.root.quit()

    def halt(self): # pylint: disable=no-self-use
        """program halt placeholder"""
        return

    def file_open(self, package=False, _=None):
        """launch a file browser"""
        if not package:
            filename = askopenfilename(parent=self.root,
                                       filetypes=[('pythonfiles', '*.py'),
                                                  ('allfiles', '*')],
                                       title='Select Module')
        else:
            filename = askdirectory(title="Select A Folder", mustexist=1)

        if filename == ():
            return

        self.txt_module.delete(0, END)
        self.txt_module.insert(0, filename)

    def update_filenames(self):
        """update the list of recent filenames"""
        filename = self.txt_module.get()
        if not filename:
            filename = os.getcwd()
        if filename+'\n' in self.filenames:
            index = self.filenames.index(filename+'\n')
            self.filenames.pop(index)

        #ensure only 10 most recent are stored
        if len(self.filenames) == 10:
            self.filenames.pop()
        self.filenames.insert(0, filename+'\n')

    def set_history_window(self):
        """update the history window with info from the history file"""
        #clear the window
        self.showhistory.delete(0, END)
        # keep the last 10 most recent files
        try:
            view_history = open(HOME+HISTORY, 'r')
            for hist in view_history.readlines():
                if not hist in self.filenames:
                    self.filenames.append(hist)
                self.showhistory.insert(END, hist.split('\n')[0])
            view_history.close()
        except IOError:
            # do nothing since history file will be created later
            return

    def run_lint(self, _=None):
        """launches pylint"""
        self.update_filenames()
        self.root.configure(cursor='watch')
        self.reporter = GUIReporter(self, output=self.report_stream)
        module = self.txt_module.get()
        if not module:
            module = os.getcwd()

        #cleaning up msgs and windows
        self.msgs = []
        self.visible_msgs = []
        self.lb_messages.delete(0, END)
        self.tabs = {}
        self.results.delete(0, END)
        self.btnRun.config(state=DISABLED)

        #setting up a worker thread to run pylint
        worker = Thread(target=lint_thread, args=(module, self.reporter, self,))
        self.periodic_call()
        worker.start()

        # Overwrite the .pylint-gui-history file with all the new recently added files
        # in order from filenames but only save last 10 files
        write_history = open(HOME+HISTORY, 'w')
        write_history.writelines(self.filenames)
        write_history.close()
        self.set_history_window()

        self.root.configure(cursor='')

    def show_sourcefile(self, event=None):  # pylint: disable=unused-argument
        selected = self.lb_messages.curselection()
        if not selected:
            return

        msg = self.visible_msgs[int(selected[0])]
        scroll = msg.line - 3
        if scroll < 0:
            scroll = 0

        self.tabs["Source File"] = open(msg.path, "r").readlines()
        self.box.set("Source File")
        self.refresh_results_window()
        self.results.yview(scroll)
        self.results.select_set(msg.line - 1)
コード例 #5
0
class LintGui(object):
    """Build and control a window to interact with pylint"""
    def __init__(self, root=None):
        """init"""
        self.root = root or Tk()
        self.root.title('Pylint')
        #reporter
        self.reporter = None
        #message queue for output from reporter
        self.msg_queue = six.moves.queue.Queue()
        self.msgs = []
        self.visible_msgs = []
        self.filenames = []
        self.rating = StringVar()
        self.tabs = {}
        self.report_stream = BasicStream(self)
        #gui objects
        self.lb_messages = None
        self.showhistory = None
        self.results = None
        self.btnRun = None
        self.information_box = None
        self.convention_box = None
        self.refactor_box = None
        self.warning_box = None
        self.error_box = None
        self.fatal_box = None
        self.txtModule = None
        self.status = None
        self.msg_type_dict = None
        self.init_gui()

    def init_gui(self):
        """init helper"""

        window = PanedWindow(self.root, orient="vertical")
        window.pack(side=TOP, fill=BOTH, expand=True)

        top_pane = Frame(window)
        window.add(top_pane)
        mid_pane = Frame(window)
        window.add(mid_pane)
        bottom_pane = Frame(window)
        window.add(bottom_pane)

        #setting up frames
        top_frame = Frame(top_pane)
        mid_frame = Frame(top_pane)
        history_frame = Frame(top_pane)
        radio_frame = Frame(mid_pane)
        rating_frame = Frame(mid_pane)
        res_frame = Frame(mid_pane)
        check_frame = Frame(bottom_pane)
        msg_frame = Frame(bottom_pane)
        btn_frame = Frame(bottom_pane)
        top_frame.pack(side=TOP, fill=X)
        mid_frame.pack(side=TOP, fill=X)
        history_frame.pack(side=TOP, fill=BOTH, expand=True)
        radio_frame.pack(side=TOP, fill=X)
        rating_frame.pack(side=TOP, fill=X)
        res_frame.pack(side=TOP, fill=BOTH, expand=True)
        check_frame.pack(side=TOP, fill=X)
        msg_frame.pack(side=TOP, fill=BOTH, expand=True)
        btn_frame.pack(side=TOP, fill=X)

        # Binding F5 application-wide to run lint
        self.root.bind('<F5>', self.run_lint)

        #Message ListBox
        rightscrollbar = Scrollbar(msg_frame)
        rightscrollbar.pack(side=RIGHT, fill=Y)
        bottomscrollbar = Scrollbar(msg_frame, orient=HORIZONTAL)
        bottomscrollbar.pack(side=BOTTOM, fill=X)
        self.lb_messages = Listbox(msg_frame,
                                   yscrollcommand=rightscrollbar.set,
                                   xscrollcommand=bottomscrollbar.set,
                                   bg="white")
        self.lb_messages.bind("<Double-Button-1>", self.show_sourcefile)
        self.lb_messages.pack(expand=True, fill=BOTH)
        rightscrollbar.config(command=self.lb_messages.yview)
        bottomscrollbar.config(command=self.lb_messages.xview)

        #History ListBoxes
        rightscrollbar2 = Scrollbar(history_frame)
        rightscrollbar2.pack(side=RIGHT, fill=Y)
        bottomscrollbar2 = Scrollbar(history_frame, orient=HORIZONTAL)
        bottomscrollbar2.pack(side=BOTTOM, fill=X)
        self.showhistory = Listbox(history_frame,
                                   yscrollcommand=rightscrollbar2.set,
                                   xscrollcommand=bottomscrollbar2.set,
                                   bg="white")
        self.showhistory.pack(expand=True, fill=BOTH)
        rightscrollbar2.config(command=self.showhistory.yview)
        bottomscrollbar2.config(command=self.showhistory.xview)
        self.showhistory.bind('<Double-Button-1>', self.select_recent_file)
        self.set_history_window()

        #status bar
        self.status = Label(self.root, text="", bd=1, relief=SUNKEN, anchor=W)
        self.status.pack(side=BOTTOM, fill=X)

        #labelbl_ratingls
        lbl_rating_label = Label(rating_frame, text='Rating:')
        lbl_rating_label.pack(side=LEFT)
        lbl_rating = Label(rating_frame, textvariable=self.rating)
        lbl_rating.pack(side=LEFT)
        Label(mid_frame, text='Recently Used:').pack(side=LEFT)
        Label(top_frame, text='Module or package').pack(side=LEFT)

        #file textbox
        self.txt_module = Entry(top_frame, background='white')
        self.txt_module.bind('<Return>', self.run_lint)
        self.txt_module.pack(side=LEFT, expand=True, fill=X)

        #results box
        rightscrollbar = Scrollbar(res_frame)
        rightscrollbar.pack(side=RIGHT, fill=Y)
        bottomscrollbar = Scrollbar(res_frame, orient=HORIZONTAL)
        bottomscrollbar.pack(side=BOTTOM, fill=X)
        self.results = Listbox(res_frame,
                               yscrollcommand=rightscrollbar.set,
                               xscrollcommand=bottomscrollbar.set,
                               bg="white",
                               font="Courier")
        self.results.pack(expand=True, fill=BOTH, side=BOTTOM)
        rightscrollbar.config(command=self.results.yview)
        bottomscrollbar.config(command=self.results.xview)

        #buttons
        Button(top_frame, text='Open', command=self.file_open).pack(side=LEFT)
        Button(top_frame,
               text='Open Package',
               command=(lambda: self.file_open(package=True))).pack(side=LEFT)

        self.btnRun = Button(top_frame, text='Run', command=self.run_lint)
        self.btnRun.pack(side=LEFT)
        Button(btn_frame, text='Quit', command=self.quit).pack(side=BOTTOM)

        #radio buttons
        self.information_box = IntVar()
        self.convention_box = IntVar()
        self.refactor_box = IntVar()
        self.warning_box = IntVar()
        self.error_box = IntVar()
        self.fatal_box = IntVar()
        i = Checkbutton(check_frame,
                        text="Information",
                        fg=COLORS['(I)'],
                        variable=self.information_box,
                        command=self.refresh_msg_window)
        c = Checkbutton(check_frame,
                        text="Convention",
                        fg=COLORS['(C)'],
                        variable=self.convention_box,
                        command=self.refresh_msg_window)
        r = Checkbutton(check_frame,
                        text="Refactor",
                        fg=COLORS['(R)'],
                        variable=self.refactor_box,
                        command=self.refresh_msg_window)
        w = Checkbutton(check_frame,
                        text="Warning",
                        fg=COLORS['(W)'],
                        variable=self.warning_box,
                        command=self.refresh_msg_window)
        e = Checkbutton(check_frame,
                        text="Error",
                        fg=COLORS['(E)'],
                        variable=self.error_box,
                        command=self.refresh_msg_window)
        f = Checkbutton(check_frame,
                        text="Fatal",
                        fg=COLORS['(F)'],
                        variable=self.fatal_box,
                        command=self.refresh_msg_window)
        i.select()
        c.select()
        r.select()
        w.select()
        e.select()
        f.select()
        i.pack(side=LEFT)
        c.pack(side=LEFT)
        r.pack(side=LEFT)
        w.pack(side=LEFT)
        e.pack(side=LEFT)
        f.pack(side=LEFT)

        #check boxes
        self.box = StringVar()
        # XXX should be generated
        report = Radiobutton(radio_frame,
                             text="Report",
                             variable=self.box,
                             value="Report",
                             command=self.refresh_results_window)
        raw_met = Radiobutton(radio_frame,
                              text="Raw metrics",
                              variable=self.box,
                              value="Raw metrics",
                              command=self.refresh_results_window)
        dup = Radiobutton(radio_frame,
                          text="Duplication",
                          variable=self.box,
                          value="Duplication",
                          command=self.refresh_results_window)
        ext = Radiobutton(radio_frame,
                          text="External dependencies",
                          variable=self.box,
                          value="External dependencies",
                          command=self.refresh_results_window)
        stat = Radiobutton(radio_frame,
                           text="Statistics by type",
                           variable=self.box,
                           value="Statistics by type",
                           command=self.refresh_results_window)
        msg_cat = Radiobutton(radio_frame,
                              text="Messages by category",
                              variable=self.box,
                              value="Messages by category",
                              command=self.refresh_results_window)
        msg = Radiobutton(radio_frame,
                          text="Messages",
                          variable=self.box,
                          value="Messages",
                          command=self.refresh_results_window)
        source_file = Radiobutton(radio_frame,
                                  text="Source File",
                                  variable=self.box,
                                  value="Source File",
                                  command=self.refresh_results_window)
        report.select()
        report.grid(column=0, row=0, sticky=W)
        raw_met.grid(column=1, row=0, sticky=W)
        dup.grid(column=2, row=0, sticky=W)
        msg.grid(column=3, row=0, sticky=W)
        stat.grid(column=0, row=1, sticky=W)
        msg_cat.grid(column=1, row=1, sticky=W)
        ext.grid(column=2, row=1, sticky=W)
        source_file.grid(column=3, row=1, sticky=W)

        #dictionary for check boxes and associated error term
        self.msg_type_dict = {
            'I': lambda: self.information_box.get() == 1,
            'C': lambda: self.convention_box.get() == 1,
            'R': lambda: self.refactor_box.get() == 1,
            'E': lambda: self.error_box.get() == 1,
            'W': lambda: self.warning_box.get() == 1,
            'F': lambda: self.fatal_box.get() == 1
        }
        self.txt_module.focus_set()

    def select_recent_file(self, event):  # pylint: disable=unused-argument
        """adds the selected file in the history listbox to the Module box"""
        if not self.showhistory.size():
            return

        selected = self.showhistory.curselection()
        item = self.showhistory.get(selected)
        #update module
        self.txt_module.delete(0, END)
        self.txt_module.insert(0, item)

    def refresh_msg_window(self):
        """refresh the message window with current output"""
        #clear the window
        self.lb_messages.delete(0, END)
        self.visible_msgs = []
        for msg in self.msgs:
            if self.msg_type_dict.get(msg.C)():
                self.visible_msgs.append(msg)
                msg_str = convert_to_string(msg)
                self.lb_messages.insert(END, msg_str)
                fg_color = COLORS.get(msg_str[:3], 'black')
                self.lb_messages.itemconfigure(END, fg=fg_color)

    def refresh_results_window(self):
        """refresh the results window with current output"""
        #clear the window
        self.results.delete(0, END)
        try:
            for res in self.tabs[self.box.get()]:
                self.results.insert(END, res)
        except KeyError:
            pass

    def process_incoming(self):
        """process the incoming messages from running pylint"""
        while self.msg_queue.qsize():
            try:
                msg = self.msg_queue.get(0)
                if msg == "DONE":
                    self.report_stream.output_contents()
                    return False

                #adding message to list of msgs
                self.msgs.append(msg)

                #displaying msg if message type is selected in check box
                if self.msg_type_dict.get(msg.C)():
                    self.visible_msgs.append(msg)
                    msg_str = convert_to_string(msg)
                    self.lb_messages.insert(END, msg_str)
                    fg_color = COLORS.get(msg_str[:3], 'black')
                    self.lb_messages.itemconfigure(END, fg=fg_color)

            except six.moves.queue.Empty:
                pass
        return True

    def periodic_call(self):
        """determine when to unlock the run button"""
        if self.process_incoming():
            self.root.after(100, self.periodic_call)
        else:
            #enabling button so it can be run again
            self.btnRun.config(state=NORMAL)

    def mainloop(self):
        """launch the mainloop of the application"""
        self.root.mainloop()

    def quit(self, _=None):
        """quit the application"""
        self.root.quit()

    def halt(self):  # pylint: disable=no-self-use
        """program halt placeholder"""
        return

    def file_open(self, package=False, _=None):
        """launch a file browser"""
        if not package:
            filename = askopenfilename(parent=self.root,
                                       filetypes=[('pythonfiles', '*.py'),
                                                  ('allfiles', '*')],
                                       title='Select Module')
        else:
            filename = askdirectory(title="Select A Folder", mustexist=1)

        if filename == ():
            return

        self.txt_module.delete(0, END)
        self.txt_module.insert(0, filename)

    def update_filenames(self):
        """update the list of recent filenames"""
        filename = self.txt_module.get()
        if not filename:
            filename = os.getcwd()
        if filename + '\n' in self.filenames:
            index = self.filenames.index(filename + '\n')
            self.filenames.pop(index)

        #ensure only 10 most recent are stored
        if len(self.filenames) == 10:
            self.filenames.pop()
        self.filenames.insert(0, filename + '\n')

    def set_history_window(self):
        """update the history window with info from the history file"""
        #clear the window
        self.showhistory.delete(0, END)
        # keep the last 10 most recent files
        try:
            view_history = open(HOME + HISTORY, 'r')
            for hist in view_history.readlines():
                if hist not in self.filenames:
                    self.filenames.append(hist)
                self.showhistory.insert(END, hist.split('\n')[0])
            view_history.close()
        except IOError:
            # do nothing since history file will be created later
            return

    def run_lint(self, _=None):
        """launches pylint"""
        self.update_filenames()
        self.root.configure(cursor='watch')
        self.reporter = GUIReporter(self, output=self.report_stream)
        module = self.txt_module.get()
        if not module:
            module = os.getcwd()

        #cleaning up msgs and windows
        self.msgs = []
        self.visible_msgs = []
        self.lb_messages.delete(0, END)
        self.tabs = {}
        self.results.delete(0, END)
        self.btnRun.config(state=DISABLED)

        #setting up a worker thread to run pylint
        worker = Thread(target=lint_thread,
                        args=(
                            module,
                            self.reporter,
                            self,
                        ))
        self.periodic_call()
        worker.start()

        # Overwrite the .pylint-gui-history file with all the new recently added files
        # in order from filenames but only save last 10 files
        write_history = open(HOME + HISTORY, 'w')
        write_history.writelines(self.filenames)
        write_history.close()
        self.set_history_window()

        self.root.configure(cursor='')

    def show_sourcefile(self, event=None):  # pylint: disable=unused-argument
        selected = self.lb_messages.curselection()
        if not selected:
            return

        msg = self.visible_msgs[int(selected[0])]
        scroll = msg.line - 3
        if scroll < 0:
            scroll = 0

        self.tabs["Source File"] = open(msg.path, "r").readlines()
        self.box.set("Source File")
        self.refresh_results_window()
        self.results.yview(scroll)
        self.results.select_set(msg.line - 1)
コード例 #6
0
ファイル: login.py プロジェクト: jwoillez/astroquery
class LoginDialog(object):

    def __init__(self, host):
        self.__interna_init()
        self.__host = host
        self.__create_content()

    def __interna_init(self):
        self.__rootFrame = None
        self.__top = None
        self.__usrEntry = None
        self.__pwdEntry = None
        self.__accepted = False
        self.__host = None
        self.__usr = None
        self.__pwd = None

    def __cancel_action(self):
        self.__accepted = False
        self.__rootFrame.destroy()

    def __login_action(self):
        self.__accepted = True
        self.__usr = self.__usrEntry.get()
        self.__pwd = self.__pwdEntry.get()
        self.__rootFrame.destroy()

    def __enter_action(self, event):
        self.__login_action()

    def __create_content(self):
        self.__rootFrame = TKTk()
        self.__rootFrame.withdraw()

        self.__top = TKToplevel(self.__rootFrame)
        self.__top.title("Login")
        self.__top.protocol("WM_DELETE_WINDOW", self.__rootFrame.destroy)

        self.__top.bind('<Return>', self.__enter_action)

        self.__top.update_idletasks()
        width = self.__top.winfo_width()
        height = self.__top.winfo_height()
        x = (self.__top.winfo_screenwidth() // 2) - (width // 2)
        y = (self.__top.winfo_screenheight() // 2) - (height // 2)

        self.__top.geometry("+%d+%d" % (x, y))

        row = 0
        expLabel = TKLabel(self.__top, text='Login to host:')
        expLabel.grid(row=row, column=0, columnspan=4, padx=5, pady=2)

        row = row+1
        urlLabel = TKLabel(self.__top, text=self.__host)
        urlLabel.grid(row=row, column=0, columnspan=4, padx=5, pady=2)

        row = row+1
        usrLabel = TKLabel(self.__top, text='User')
        usrLabel.grid(row=row, column=0, columnspan=2, padx=20, pady=5)
        self.__usrEntry = TKEntry(self.__top, width=20)
        self.__usrEntry.grid(row=row, column=2, columnspan=2, padx=5, pady=5)

        row = row+1
        pwdLabel = TKLabel(self.__top, text='Password')
        pwdLabel.grid(row=row, column=0, columnspan=2, padx=20, pady=5)
        self.__pwdEntry = TKEntry(self.__top, width=20, show="*")
        self.__pwdEntry.grid(row=row, column=2, columnspan=2, padx=5, pady=5)

        row = row+1
        cancelButton = TKButton(self.__top, text='Cancel', command=self.__cancel_action)
        cancelButton.grid(row=row, column=1, padx=5, pady=5)
        loginButton = TKButton(self.__top, text='Login', command=self.__login_action)
        loginButton.grid(row=row, column=2, padx=5, pady=5)

    def show_login(self):
        self.__usrEntry.focus_set()
        self.__rootFrame.mainloop()

    def is_accepted(self):
        return self.__accepted

    def get_user(self):
        return self.__usr

    def get_password(self):
        return self.__pwd
コード例 #7
0
class ConcordanceSearchView(object):
    _BACKGROUND_COLOUR='#FFF' #white

    #Colour of highlighted results
    _HIGHLIGHT_WORD_COLOUR='#F00' #red
    _HIGHLIGHT_WORD_TAG='HL_WRD_TAG'

    _HIGHLIGHT_LABEL_COLOUR='#C0C0C0' # dark grey
    _HIGHLIGHT_LABEL_TAG='HL_LBL_TAG'


    #Percentage of text left of the scrollbar position
    _FRACTION_LEFT_TEXT=0.30

    def __init__(self):
        self.queue = q.Queue()
        self.model = ConcordanceSearchModel(self.queue)
        self.top = Tk()
        self._init_top(self.top)
        self._init_menubar()
        self._init_widgets(self.top)
        self.load_corpus(self.model.DEFAULT_CORPUS)
        self.after = self.top.after(POLL_INTERVAL, self._poll)

    def _init_top(self, top):
        top.geometry('950x680+50+50')
        top.title('NLTK Concordance Search')
        top.bind('<Control-q>', self.destroy)
        top.protocol('WM_DELETE_WINDOW', self.destroy)
        top.minsize(950,680)

    def _init_widgets(self, parent):
        self.main_frame = Frame(parent, dict(background=self._BACKGROUND_COLOUR, padx=1, pady=1, border=1))
        self._init_corpus_select(self.main_frame)
        self._init_query_box(self.main_frame)
        self._init_results_box(self.main_frame)
        self._init_paging(self.main_frame)
        self._init_status(self.main_frame)
        self.main_frame.pack(fill='both', expand=True)

    def _init_menubar(self):
        self._result_size = IntVar(self.top)
        self._cntx_bf_len = IntVar(self.top)
        self._cntx_af_len = IntVar(self.top)
        menubar = Menu(self.top)

        filemenu = Menu(menubar, tearoff=0, borderwidth=0)
        filemenu.add_command(label='Exit', underline=1,
                             command=self.destroy, accelerator='Ctrl-q')
        menubar.add_cascade(label='File', underline=0, menu=filemenu)

        editmenu = Menu(menubar, tearoff=0)
        rescntmenu = Menu(editmenu, tearoff=0)
        rescntmenu.add_radiobutton(label='20', variable=self._result_size,
                                   underline=0, value=20,
                                   command=self.set_result_size)
        rescntmenu.add_radiobutton(label='50', variable=self._result_size,
                                   underline=0, value=50,
                                   command=self.set_result_size)
        rescntmenu.add_radiobutton(label='100', variable=self._result_size,
                                   underline=0, value=100,
                                   command=self.set_result_size)
        rescntmenu.invoke(1)
        editmenu.add_cascade(label='Result Count', underline=0, menu=rescntmenu)

        cntxmenu = Menu(editmenu, tearoff=0)
        cntxbfmenu = Menu(cntxmenu, tearoff=0)
        cntxbfmenu.add_radiobutton(label='60 characters',
                                   variable=self._cntx_bf_len,
                                   underline=0, value=60,
                                   command=self.set_cntx_bf_len)
        cntxbfmenu.add_radiobutton(label='80 characters',
                                   variable=self._cntx_bf_len,
                                   underline=0, value=80,
                                   command=self.set_cntx_bf_len)
        cntxbfmenu.add_radiobutton(label='100 characters',
                                   variable=self._cntx_bf_len,
                                   underline=0, value=100,
                                   command=self.set_cntx_bf_len)
        cntxbfmenu.invoke(1)
        cntxmenu.add_cascade(label='Before', underline=0, menu=cntxbfmenu)

        cntxafmenu = Menu(cntxmenu, tearoff=0)
        cntxafmenu.add_radiobutton(label='70 characters',
                                   variable=self._cntx_af_len,
                                   underline=0, value=70,
                                   command=self.set_cntx_af_len)
        cntxafmenu.add_radiobutton(label='90 characters',
                                   variable=self._cntx_af_len,
                                   underline=0, value=90,
                                   command=self.set_cntx_af_len)
        cntxafmenu.add_radiobutton(label='110 characters',
                                   variable=self._cntx_af_len,
                                   underline=0, value=110,
                                   command=self.set_cntx_af_len)
        cntxafmenu.invoke(1)
        cntxmenu.add_cascade(label='After', underline=0, menu=cntxafmenu)

        editmenu.add_cascade(label='Context', underline=0, menu=cntxmenu)

        menubar.add_cascade(label='Edit', underline=0, menu=editmenu)

        self.top.config(menu=menubar)

    def set_result_size(self, **kwargs):
        self.model.result_count = self._result_size.get()

    def set_cntx_af_len(self, **kwargs):
        self._char_after = self._cntx_af_len.get()

    def set_cntx_bf_len(self, **kwargs):
        self._char_before = self._cntx_bf_len.get()

    def _init_corpus_select(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        self.var = StringVar(innerframe)
        self.var.set(self.model.DEFAULT_CORPUS)
        Label(innerframe, justify=LEFT, text=' Corpus: ',
              background=self._BACKGROUND_COLOUR, padx = 2, pady = 1, border = 0).pack(side='left')

        other_corpora = list(self.model.CORPORA.keys()).remove(self.model.DEFAULT_CORPUS)
        om = OptionMenu(innerframe, self.var, self.model.DEFAULT_CORPUS, command=self.corpus_selected, *self.model.non_default_corpora())
        om['borderwidth'] = 0
        om['highlightthickness'] = 1
        om.pack(side='left')
        innerframe.pack(side='top', fill='x', anchor='n')

    def _init_status(self, parent):
        self.status = Label(parent, justify=LEFT, relief=SUNKEN, background=self._BACKGROUND_COLOUR, border=0, padx = 1, pady = 0)
        self.status.pack(side='top', anchor='sw')

    def _init_query_box(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        another = Frame(innerframe, background=self._BACKGROUND_COLOUR)
        self.query_box = Entry(another, width=60)
        self.query_box.pack(side='left', fill='x', pady=25, anchor='center')
        self.search_button = Button(another, text='Search', command=self.search, borderwidth=1, highlightthickness=1)
        self.search_button.pack(side='left', fill='x', pady=25, anchor='center')
        self.query_box.bind('<KeyPress-Return>', self.search_enter_keypress_handler)
        another.pack()
        innerframe.pack(side='top', fill='x', anchor='n')

    def search_enter_keypress_handler(self, *event):
        self.search()

    def _init_results_box(self, parent):
        innerframe = Frame(parent)
        i1 = Frame(innerframe)
        i2 = Frame(innerframe)
        vscrollbar = Scrollbar(i1, borderwidth=1)
        hscrollbar = Scrollbar(i2, borderwidth=1, orient='horiz')
        self.results_box = Text(i1,
                                font=Font(family='courier', size='16'),
                                state='disabled', borderwidth=1,
                                                            yscrollcommand=vscrollbar.set,
                                xscrollcommand=hscrollbar.set, wrap='none', width='40', height = '20', exportselection=1)
        self.results_box.pack(side='left', fill='both', expand=True)
        self.results_box.tag_config(self._HIGHLIGHT_WORD_TAG, foreground=self._HIGHLIGHT_WORD_COLOUR)
        self.results_box.tag_config(self._HIGHLIGHT_LABEL_TAG, foreground=self._HIGHLIGHT_LABEL_COLOUR)
        vscrollbar.pack(side='left', fill='y', anchor='e')
        vscrollbar.config(command=self.results_box.yview)
        hscrollbar.pack(side='left', fill='x', expand=True, anchor='w')
        hscrollbar.config(command=self.results_box.xview)
        #there is no other way of avoiding the overlap of scrollbars while using pack layout manager!!!
        Label(i2, text='   ', background=self._BACKGROUND_COLOUR).pack(side='left', anchor='e')
        i1.pack(side='top', fill='both', expand=True, anchor='n')
        i2.pack(side='bottom', fill='x', anchor='s')
        innerframe.pack(side='top', fill='both', expand=True)

    def _init_paging(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        self.prev = prev = Button(innerframe, text='Previous', command=self.previous, width='10', borderwidth=1, highlightthickness=1, state='disabled')
        prev.pack(side='left', anchor='center')
        self.next = next = Button(innerframe, text='Next', command=self.__next__, width='10', borderwidth=1, highlightthickness=1, state='disabled')
        next.pack(side='right', anchor='center')
        innerframe.pack(side='top', fill='y')
        self.current_page = 0

    def previous(self):
        self.clear_results_box()
        self.freeze_editable()
        self.model.prev(self.current_page - 1)

    def __next__(self):
        self.clear_results_box()
        self.freeze_editable()
        self.model.next(self.current_page + 1)

    def about(self, *e):
        ABOUT = ("NLTK Concordance Search Demo\n")
        TITLE = 'About: NLTK Concordance Search Demo'
        try:
            from six.moves.tkinter_messagebox import Message
            Message(message=ABOUT, title=TITLE, parent=self.main_frame).show()
        except:
            ShowText(self.top, TITLE, ABOUT)

    def _bind_event_handlers(self):
        self.top.bind(CORPUS_LOADED_EVENT, self.handle_corpus_loaded)
        self.top.bind(SEARCH_TERMINATED_EVENT, self.handle_search_terminated)
        self.top.bind(SEARCH_ERROR_EVENT, self.handle_search_error)
        self.top.bind(ERROR_LOADING_CORPUS_EVENT, self.handle_error_loading_corpus)

    def _poll(self):
        try:
            event = self.queue.get(block=False)
        except q.Empty:
            pass
        else:
            if event == CORPUS_LOADED_EVENT:
                self.handle_corpus_loaded(event)
            elif event == SEARCH_TERMINATED_EVENT:
                self.handle_search_terminated(event)
            elif event == SEARCH_ERROR_EVENT:
                self.handle_search_error(event)
            elif event == ERROR_LOADING_CORPUS_EVENT:
                self.handle_error_loading_corpus(event)
        self.after = self.top.after(POLL_INTERVAL, self._poll)

    def handle_error_loading_corpus(self, event):
        self.status['text'] = 'Error in loading ' + self.var.get()
        self.unfreeze_editable()
        self.clear_all()
        self.freeze_editable()

    def handle_corpus_loaded(self, event):
        self.status['text'] = self.var.get() + ' is loaded'
        self.unfreeze_editable()
        self.clear_all()
        self.query_box.focus_set()

    def handle_search_terminated(self, event):
        #todo: refactor the model such that it is less state sensitive
        results = self.model.get_results()
        self.write_results(results)
        self.status['text'] = ''
        if len(results) == 0:
            self.status['text'] = 'No results found for ' + self.model.query
        else:
                self.current_page = self.model.last_requested_page
        self.unfreeze_editable()
        self.results_box.xview_moveto(self._FRACTION_LEFT_TEXT)

    def handle_search_error(self, event):
        self.status['text'] = 'Error in query ' + self.model.query
        self.unfreeze_editable()

    def corpus_selected(self, *args):
        new_selection = self.var.get()
        self.load_corpus(new_selection)

    def load_corpus(self, selection):
        if self.model.selected_corpus != selection:
            self.status['text'] = 'Loading ' + selection + '...'
            self.freeze_editable()
            self.model.load_corpus(selection)

    def search(self):
        self.current_page = 0
        self.clear_results_box()
        self.model.reset_results()
        query = self.query_box.get()
        if (len(query.strip()) == 0): return
        self.status['text']  = 'Searching for ' + query
        self.freeze_editable()
        self.model.search(query, self.current_page + 1, )


    def write_results(self, results):
        self.results_box['state'] = 'normal'
        row = 1
        for each in results:
            sent, pos1, pos2 = each[0].strip(), each[1], each[2]
            if len(sent) != 0:
                if (pos1 < self._char_before):
                    sent, pos1, pos2 = self.pad(sent, pos1, pos2)
                sentence = sent[pos1-self._char_before:pos1+self._char_after]
                if not row == len(results):
                    sentence += '\n'
                self.results_box.insert(str(row) + '.0', sentence)
                word_markers, label_markers = self.words_and_labels(sent, pos1, pos2)
                for marker in word_markers: self.results_box.tag_add(self._HIGHLIGHT_WORD_TAG, str(row) + '.' + str(marker[0]), str(row) + '.' + str(marker[1]))
                for marker in label_markers: self.results_box.tag_add(self._HIGHLIGHT_LABEL_TAG, str(row) + '.' + str(marker[0]), str(row) + '.' + str(marker[1]))
                row += 1
        self.results_box['state'] = 'disabled'

    def words_and_labels(self, sentence, pos1, pos2):
        search_exp = sentence[pos1:pos2]
        words, labels = [], []
        labeled_words = search_exp.split(' ')
        index = 0
        for each in labeled_words:
            if each == '':
                index += 1
            else:
                word, label = each.split('/')
                words.append((self._char_before + index, self._char_before + index + len(word)))
                index += len(word) + 1
                labels.append((self._char_before + index, self._char_before + index + len(label)))
                index += len(label)
            index += 1
        return words, labels

    def pad(self, sent, hstart, hend):
        if hstart >= self._char_before:
            return sent, hstart, hend
        d = self._char_before - hstart
        sent = ''.join([' '] * d) + sent
        return sent, hstart + d, hend + d

    def destroy(self, *e):
        if self.top is None: return
        self.top.after_cancel(self.after)
        self.top.destroy()
        self.top = None

    def clear_all(self):
        self.query_box.delete(0, END)
        self.model.reset_query()
        self.clear_results_box()

    def clear_results_box(self):
        self.results_box['state'] = 'normal'
        self.results_box.delete("1.0", END)
        self.results_box['state'] = 'disabled'

    def freeze_editable(self):
        self.query_box['state'] = 'disabled'
        self.search_button['state'] = 'disabled'
        self.prev['state'] = 'disabled'
        self.next['state'] = 'disabled'

    def unfreeze_editable(self):
        self.query_box['state'] = 'normal'
        self.search_button['state'] = 'normal'
        self.set_paging_button_states()

    def set_paging_button_states(self):
        if self.current_page == 0 or self.current_page == 1:
            self.prev['state'] = 'disabled'
        else:
            self.prev['state'] = 'normal'
        if self.model.has_more_pages(self.current_page):
            self.next['state'] = 'normal'
        else:
            self.next['state'] = 'disabled'

    def fire_event(self, event):
        #Firing an event so that rendering of widgets happen in the mainloop thread
        self.top.event_generate(event, when='tail')

    def mainloop(self, *args, **kwargs):
        if in_idle(): return
        self.top.mainloop(*args, **kwargs)
コード例 #8
0
class ConcordanceSearchView(object):
    _BACKGROUND_COLOUR = "#FFF"  # white

    # Colour of highlighted results
    _HIGHLIGHT_WORD_COLOUR = "#F00"  # red
    _HIGHLIGHT_WORD_TAG = "HL_WRD_TAG"

    _HIGHLIGHT_LABEL_COLOUR = "#C0C0C0"  # dark grey
    _HIGHLIGHT_LABEL_TAG = "HL_LBL_TAG"

    # Percentage of text left of the scrollbar position
    _FRACTION_LEFT_TEXT = 0.30

    def __init__(self):
        self.queue = q.Queue()
        self.model = ConcordanceSearchModel(self.queue)
        self.top = Tk()
        self._init_top(self.top)
        self._init_menubar()
        self._init_widgets(self.top)
        self.load_corpus(self.model.DEFAULT_CORPUS)
        self.after = self.top.after(POLL_INTERVAL, self._poll)

    def _init_top(self, top):
        top.geometry("950x680+50+50")
        top.title("NLTK Concordance Search")
        top.bind("<Control-q>", self.destroy)
        top.protocol("WM_DELETE_WINDOW", self.destroy)
        top.minsize(950, 680)

    def _init_widgets(self, parent):
        self.main_frame = Frame(
            parent,
            dict(background=self._BACKGROUND_COLOUR, padx=1, pady=1, border=1))
        self._init_corpus_select(self.main_frame)
        self._init_query_box(self.main_frame)
        self._init_results_box(self.main_frame)
        self._init_paging(self.main_frame)
        self._init_status(self.main_frame)
        self.main_frame.pack(fill="both", expand=True)

    def _init_menubar(self):
        self._result_size = IntVar(self.top)
        self._cntx_bf_len = IntVar(self.top)
        self._cntx_af_len = IntVar(self.top)
        menubar = Menu(self.top)

        filemenu = Menu(menubar, tearoff=0, borderwidth=0)
        filemenu.add_command(label="Exit",
                             underline=1,
                             command=self.destroy,
                             accelerator="Ctrl-q")
        menubar.add_cascade(label="File", underline=0, menu=filemenu)

        editmenu = Menu(menubar, tearoff=0)
        rescntmenu = Menu(editmenu, tearoff=0)
        rescntmenu.add_radiobutton(
            label="20",
            variable=self._result_size,
            underline=0,
            value=20,
            command=self.set_result_size,
        )
        rescntmenu.add_radiobutton(
            label="50",
            variable=self._result_size,
            underline=0,
            value=50,
            command=self.set_result_size,
        )
        rescntmenu.add_radiobutton(
            label="100",
            variable=self._result_size,
            underline=0,
            value=100,
            command=self.set_result_size,
        )
        rescntmenu.invoke(1)
        editmenu.add_cascade(label="Result Count",
                             underline=0,
                             menu=rescntmenu)

        cntxmenu = Menu(editmenu, tearoff=0)
        cntxbfmenu = Menu(cntxmenu, tearoff=0)
        cntxbfmenu.add_radiobutton(
            label="60 characters",
            variable=self._cntx_bf_len,
            underline=0,
            value=60,
            command=self.set_cntx_bf_len,
        )
        cntxbfmenu.add_radiobutton(
            label="80 characters",
            variable=self._cntx_bf_len,
            underline=0,
            value=80,
            command=self.set_cntx_bf_len,
        )
        cntxbfmenu.add_radiobutton(
            label="100 characters",
            variable=self._cntx_bf_len,
            underline=0,
            value=100,
            command=self.set_cntx_bf_len,
        )
        cntxbfmenu.invoke(1)
        cntxmenu.add_cascade(label="Before", underline=0, menu=cntxbfmenu)

        cntxafmenu = Menu(cntxmenu, tearoff=0)
        cntxafmenu.add_radiobutton(
            label="70 characters",
            variable=self._cntx_af_len,
            underline=0,
            value=70,
            command=self.set_cntx_af_len,
        )
        cntxafmenu.add_radiobutton(
            label="90 characters",
            variable=self._cntx_af_len,
            underline=0,
            value=90,
            command=self.set_cntx_af_len,
        )
        cntxafmenu.add_radiobutton(
            label="110 characters",
            variable=self._cntx_af_len,
            underline=0,
            value=110,
            command=self.set_cntx_af_len,
        )
        cntxafmenu.invoke(1)
        cntxmenu.add_cascade(label="After", underline=0, menu=cntxafmenu)

        editmenu.add_cascade(label="Context", underline=0, menu=cntxmenu)

        menubar.add_cascade(label="Edit", underline=0, menu=editmenu)

        self.top.config(menu=menubar)

    def set_result_size(self, **kwargs):
        self.model.result_count = self._result_size.get()

    def set_cntx_af_len(self, **kwargs):
        self._char_after = self._cntx_af_len.get()

    def set_cntx_bf_len(self, **kwargs):
        self._char_before = self._cntx_bf_len.get()

    def _init_corpus_select(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        self.var = StringVar(innerframe)
        self.var.set(self.model.DEFAULT_CORPUS)
        Label(
            innerframe,
            justify=LEFT,
            text=" Corpus: ",
            background=self._BACKGROUND_COLOUR,
            padx=2,
            pady=1,
            border=0,
        ).pack(side="left")

        other_corpora = list(self.model.CORPORA.keys()).remove(
            self.model.DEFAULT_CORPUS)
        om = OptionMenu(innerframe,
                        self.var,
                        self.model.DEFAULT_CORPUS,
                        command=self.corpus_selected,
                        *self.model.non_default_corpora())
        om["borderwidth"] = 0
        om["highlightthickness"] = 1
        om.pack(side="left")
        innerframe.pack(side="top", fill="x", anchor="n")

    def _init_status(self, parent):
        self.status = Label(
            parent,
            justify=LEFT,
            relief=SUNKEN,
            background=self._BACKGROUND_COLOUR,
            border=0,
            padx=1,
            pady=0,
        )
        self.status.pack(side="top", anchor="sw")

    def _init_query_box(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        another = Frame(innerframe, background=self._BACKGROUND_COLOUR)
        self.query_box = Entry(another, width=60)
        self.query_box.pack(side="left", fill="x", pady=25, anchor="center")
        self.search_button = Button(
            another,
            text="Search",
            command=self.search,
            borderwidth=1,
            highlightthickness=1,
        )
        self.search_button.pack(side="left",
                                fill="x",
                                pady=25,
                                anchor="center")
        self.query_box.bind("<KeyPress-Return>",
                            self.search_enter_keypress_handler)
        another.pack()
        innerframe.pack(side="top", fill="x", anchor="n")

    def search_enter_keypress_handler(self, *event):
        self.search()

    def _init_results_box(self, parent):
        innerframe = Frame(parent)
        i1 = Frame(innerframe)
        i2 = Frame(innerframe)
        vscrollbar = Scrollbar(i1, borderwidth=1)
        hscrollbar = Scrollbar(i2, borderwidth=1, orient="horiz")
        self.results_box = Text(
            i1,
            font=Font(family="courier", size="16"),
            state="disabled",
            borderwidth=1,
            yscrollcommand=vscrollbar.set,
            xscrollcommand=hscrollbar.set,
            wrap="none",
            width="40",
            height="20",
            exportselection=1,
        )
        self.results_box.pack(side="left", fill="both", expand=True)
        self.results_box.tag_config(self._HIGHLIGHT_WORD_TAG,
                                    foreground=self._HIGHLIGHT_WORD_COLOUR)
        self.results_box.tag_config(self._HIGHLIGHT_LABEL_TAG,
                                    foreground=self._HIGHLIGHT_LABEL_COLOUR)
        vscrollbar.pack(side="left", fill="y", anchor="e")
        vscrollbar.config(command=self.results_box.yview)
        hscrollbar.pack(side="left", fill="x", expand=True, anchor="w")
        hscrollbar.config(command=self.results_box.xview)
        # there is no other way of avoiding the overlap of scrollbars while using pack layout manager!!!
        Label(i2, text="   ",
              background=self._BACKGROUND_COLOUR).pack(side="left", anchor="e")
        i1.pack(side="top", fill="both", expand=True, anchor="n")
        i2.pack(side="bottom", fill="x", anchor="s")
        innerframe.pack(side="top", fill="both", expand=True)

    def _init_paging(self, parent):
        innerframe = Frame(parent, background=self._BACKGROUND_COLOUR)
        self.prev = prev = Button(
            innerframe,
            text="Previous",
            command=self.previous,
            width="10",
            borderwidth=1,
            highlightthickness=1,
            state="disabled",
        )
        prev.pack(side="left", anchor="center")
        self.next = next = Button(
            innerframe,
            text="Next",
            command=self.__next__,
            width="10",
            borderwidth=1,
            highlightthickness=1,
            state="disabled",
        )
        next.pack(side="right", anchor="center")
        innerframe.pack(side="top", fill="y")
        self.current_page = 0

    def previous(self):
        self.clear_results_box()
        self.freeze_editable()
        self.model.prev(self.current_page - 1)

    def __next__(self):
        self.clear_results_box()
        self.freeze_editable()
        self.model.next(self.current_page + 1)

    def about(self, *e):
        ABOUT = "NLTK Concordance Search Demo\n"
        TITLE = "About: NLTK Concordance Search Demo"
        try:
            from six.moves.tkinter_messagebox import Message

            Message(message=ABOUT, title=TITLE, parent=self.main_frame).show()
        except:
            ShowText(self.top, TITLE, ABOUT)

    def _bind_event_handlers(self):
        self.top.bind(CORPUS_LOADED_EVENT, self.handle_corpus_loaded)
        self.top.bind(SEARCH_TERMINATED_EVENT, self.handle_search_terminated)
        self.top.bind(SEARCH_ERROR_EVENT, self.handle_search_error)
        self.top.bind(ERROR_LOADING_CORPUS_EVENT,
                      self.handle_error_loading_corpus)

    def _poll(self):
        try:
            event = self.queue.get(block=False)
        except q.Empty:
            pass
        else:
            if event == CORPUS_LOADED_EVENT:
                self.handle_corpus_loaded(event)
            elif event == SEARCH_TERMINATED_EVENT:
                self.handle_search_terminated(event)
            elif event == SEARCH_ERROR_EVENT:
                self.handle_search_error(event)
            elif event == ERROR_LOADING_CORPUS_EVENT:
                self.handle_error_loading_corpus(event)
        self.after = self.top.after(POLL_INTERVAL, self._poll)

    def handle_error_loading_corpus(self, event):
        self.status["text"] = "Error in loading " + self.var.get()
        self.unfreeze_editable()
        self.clear_all()
        self.freeze_editable()

    def handle_corpus_loaded(self, event):
        self.status["text"] = self.var.get() + " is loaded"
        self.unfreeze_editable()
        self.clear_all()
        self.query_box.focus_set()

    def handle_search_terminated(self, event):
        # todo: refactor the model such that it is less state sensitive
        results = self.model.get_results()
        self.write_results(results)
        self.status["text"] = ""
        if len(results) == 0:
            self.status["text"] = "No results found for " + self.model.query
        else:
            self.current_page = self.model.last_requested_page
        self.unfreeze_editable()
        self.results_box.xview_moveto(self._FRACTION_LEFT_TEXT)

    def handle_search_error(self, event):
        self.status["text"] = "Error in query " + self.model.query
        self.unfreeze_editable()

    def corpus_selected(self, *args):
        new_selection = self.var.get()
        self.load_corpus(new_selection)

    def load_corpus(self, selection):
        if self.model.selected_corpus != selection:
            self.status["text"] = "Loading " + selection + "..."
            self.freeze_editable()
            self.model.load_corpus(selection)

    def search(self):
        self.current_page = 0
        self.clear_results_box()
        self.model.reset_results()
        query = self.query_box.get()
        if len(query.strip()) == 0:
            return
        self.status["text"] = "Searching for " + query
        self.freeze_editable()
        self.model.search(query, self.current_page + 1)

    def write_results(self, results):
        self.results_box["state"] = "normal"
        row = 1
        for each in results:
            sent, pos1, pos2 = each[0].strip(), each[1], each[2]
            if len(sent) != 0:
                if pos1 < self._char_before:
                    sent, pos1, pos2 = self.pad(sent, pos1, pos2)
                sentence = sent[pos1 - self._char_before:pos1 +
                                self._char_after]
                if not row == len(results):
                    sentence += "\n"
                self.results_box.insert(str(row) + ".0", sentence)
                word_markers, label_markers = self.words_and_labels(
                    sent, pos1, pos2)
                for marker in word_markers:
                    self.results_box.tag_add(
                        self._HIGHLIGHT_WORD_TAG,
                        str(row) + "." + str(marker[0]),
                        str(row) + "." + str(marker[1]),
                    )
                for marker in label_markers:
                    self.results_box.tag_add(
                        self._HIGHLIGHT_LABEL_TAG,
                        str(row) + "." + str(marker[0]),
                        str(row) + "." + str(marker[1]),
                    )
                row += 1
        self.results_box["state"] = "disabled"

    def words_and_labels(self, sentence, pos1, pos2):
        search_exp = sentence[pos1:pos2]
        words, labels = [], []
        labeled_words = search_exp.split(" ")
        index = 0
        for each in labeled_words:
            if each == "":
                index += 1
            else:
                word, label = each.split("/")
                words.append((self._char_before + index,
                              self._char_before + index + len(word)))
                index += len(word) + 1
                labels.append((self._char_before + index,
                               self._char_before + index + len(label)))
                index += len(label)
            index += 1
        return words, labels

    def pad(self, sent, hstart, hend):
        if hstart >= self._char_before:
            return sent, hstart, hend
        d = self._char_before - hstart
        sent = "".join([" "] * d) + sent
        return sent, hstart + d, hend + d

    def destroy(self, *e):
        if self.top is None:
            return
        self.top.after_cancel(self.after)
        self.top.destroy()
        self.top = None

    def clear_all(self):
        self.query_box.delete(0, END)
        self.model.reset_query()
        self.clear_results_box()

    def clear_results_box(self):
        self.results_box["state"] = "normal"
        self.results_box.delete("1.0", END)
        self.results_box["state"] = "disabled"

    def freeze_editable(self):
        self.query_box["state"] = "disabled"
        self.search_button["state"] = "disabled"
        self.prev["state"] = "disabled"
        self.next["state"] = "disabled"

    def unfreeze_editable(self):
        self.query_box["state"] = "normal"
        self.search_button["state"] = "normal"
        self.set_paging_button_states()

    def set_paging_button_states(self):
        if self.current_page == 0 or self.current_page == 1:
            self.prev["state"] = "disabled"
        else:
            self.prev["state"] = "normal"
        if self.model.has_more_pages(self.current_page):
            self.next["state"] = "normal"
        else:
            self.next["state"] = "disabled"

    def fire_event(self, event):
        # Firing an event so that rendering of widgets happen in the mainloop thread
        self.top.event_generate(event, when="tail")

    def mainloop(self, *args, **kwargs):
        if in_idle():
            return
        self.top.mainloop(*args, **kwargs)