def __init__(self):
"""Sets up the window and the widgets."""
EasyFrame.__init__(self, title="Song Browser", width=300, height=150)
# Create a model
self.database = SongDatabase()
self.selectedTitle = None
# Set up the menus
menuBar = self.addMenuBar(row=0, column=0, columnspan=2)
fileMenu = menuBar.addMenu("File")
fileMenu.addMenuItem("Open", self.openFile)
fileMenu.addMenuItem("Save", self.saveFile)
fileMenu.addMenuItem("Save As...", self.saveFileAs)
self.editMenu = menuBar.addMenu("Edit", state=DISABLED)
self.editMenu.addMenuItem("Find", self.findSong)
self.editMenu.addMenuItem("Delete", self.deleteSong)
# Set up the list box
self.listBox = self.addListbox(row=1,
column=0,
width=20,
listItemSelected=self.listItemSelected)
# Set the text area
self.outputArea = self.addTextArea("",
row=1,
column=1,
width=30,
height=4)
def __init__(self):
"""Sets up the window and the widgets."""
EasyFrame.__init__(self, title = "Song Browser",
width = 300, height = 150)
# Create a model
self.database = SongDatabase()
self.selectedTitle = None
# Set up the menus
menuBar = self.addMenuBar(row = 0, column = 0, columnspan = 2)
fileMenu = menuBar.addMenu("File")
fileMenu.addMenuItem("Open", self.openFile)
fileMenu.addMenuItem("Save", self.saveFile)
fileMenu.addMenuItem("Save As...", self.saveFileAs)
self.editMenu = menuBar.addMenu("Edit", state = DISABLED)
self.editMenu.addMenuItem("Find", self.findSong)
self.editMenu.addMenuItem("Delete", self.deleteSong)
# Set up the list box
self.listBox = self.addListbox(row = 1, column = 0, width = 20,
listItemSelected = self.listItemSelected)
# Set the text area
self.outputArea = self.addTextArea("", row = 1, column = 1,
width = 30, height = 4)
def openFile(self):
"""Pops up an open file dialog. Updates the view if
a file is opened."""
filetypes = [("Database files", "*.dat")]
fileName = tkinter.filedialog.askopenfilename(parent=self,
filetypes=filetypes)
if fileName == "": return
self.database = SongDatabase(fileName)
self.listBox.clear()
for title in self.database.getTitles():
self.listBox.insert(END, title)
self.listBox.setSelectedIndex(0)
self.listItemSelected(0)
if self.listBox.size() > 0:
self.editMenu["state"] = NORMAL
else:
self.editMenu["state"] = DISABLED
def openFile(self):
"""Pops up an open file dialog. Updates the view if
a file is opened."""
filetypes = [("Database files", "*.dat")]
fileName = tkinter.filedialog.askopenfilename(parent = self,
filetypes = filetypes)
if fileName == "": return
self.database = SongDatabase(fileName)
self.listBox.clear()
for title in self.database.getTitles():
self.listBox.insert(END, title)
self.listBox.setSelectedIndex(0)
self.listItemSelected(0)
if self.listBox.size() > 0:
self.editMenu["state"] = NORMAL
else:
self.editMenu["state"] = DISABLED
class SongBrowser(EasyFrame):
"""Allows the user to browse songs in a database file, delete them,
and save the database to a file."""
def __init__(self):
"""Sets up the window and the widgets."""
EasyFrame.__init__(self, title = "Song Browser",
width = 300, height = 150)
# Create a model
self.database = SongDatabase()
self.selectedTitle = None
# Set up the menus
menuBar = self.addMenuBar(row = 0, column = 0, columnspan = 2)
fileMenu = menuBar.addMenu("File")
fileMenu.addMenuItem("Open", self.openFile)
fileMenu.addMenuItem("Save", self.saveFile)
fileMenu.addMenuItem("Save As...", self.saveFileAs)
self.editMenu = menuBar.addMenu("Edit", state = DISABLED)
self.editMenu.addMenuItem("Find", self.findSong)
self.editMenu.addMenuItem("Delete", self.deleteSong)
# Set up the list box
self.listBox = self.addListbox(row = 1, column = 0, width = 20,
listItemSelected = self.listItemSelected)
# Set the text area
self.outputArea = self.addTextArea("", row = 1, column = 1,
width = 30, height = 4)
# Event handling methods
def listItemSelected(self, index):
"""Responds to the selection of an item in the list box.
Updates the selected title and the text area with the
current song's info."""
self.selectedTitle = self.listBox.getSelectedItem()
if self.selectedTitle == "":
self.outputArea.setText("")
else:
self.outputArea.setText(str(self.database[self.selectedTitle]))
def openFile(self):
"""Pops up an open file dialog. Updates the view if
a file is opened."""
filetypes = [("Database files", "*.dat")]
fileName = tkinter.filedialog.askopenfilename(parent = self,
filetypes = filetypes)
if fileName == "": return
self.database = SongDatabase(fileName)
self.listBox.clear()
for title in self.database.getTitles():
self.listBox.insert(END, title)
self.listBox.setSelectedIndex(0)
self.listItemSelected(0)
if self.listBox.size() > 0:
self.editMenu["state"] = NORMAL
else:
self.editMenu["state"] = DISABLED
def saveFile(self):
"""If the database has a file name, saves it to the file.
Otherwise, calls saveFileAs to prompt the user for a file
name."""
if self.database.fileName != "":
self.database.save()
else:
self.saveFileAs()
def saveFileAs(self):
"""Pops up a dialog to save the database to a file."""
fileName = tkinter.filedialog.asksaveasfilename(parent = self)
if fileName != "":
self.database.save(fileName)
def findSong(self):
"""Prompts the user for a title and searches for the song.
Selects and updates if found."""
title = self.prompterBox(title = "Find",
promptString = "Enter a song's title")
if title == "": return
song = self.database[title]
if not song:
self.messageBox(message = title + " was not found")
else:
index = self.listBox.getIndex(title)
self.listBox.setSelectedIndex(index)
self.listItemSelected(index)
def deleteSong(self):
"""Deletes the selected song from the database and updates the view."""
if self.selectedTitle:
self.database.pop(self.selectedTitle)
index = self.listBox.getSelectedIndex()
self.listBox.delete(index)
if self.listBox.size() > 0:
if index > 0:
index -= 1
self.listBox.setSelectedIndex(index)
self.listItemSelected(index)
else:
self.listItemSelected(-1)
self.editMenu["state"] = DISABLED
class SongBrowser(EasyFrame):
"""Allows the user to browse songs in a database file, delete them,
and save the database to a file."""
def __init__(self):
"""Sets up the window and the widgets."""
EasyFrame.__init__(self, title="Song Browser", width=300, height=150)
# Create a model
self.database = SongDatabase()
self.selectedTitle = None
# Set up the menus
menuBar = self.addMenuBar(row=0, column=0, columnspan=2)
fileMenu = menuBar.addMenu("File")
fileMenu.addMenuItem("Open", self.openFile)
fileMenu.addMenuItem("Save", self.saveFile)
fileMenu.addMenuItem("Save As...", self.saveFileAs)
self.editMenu = menuBar.addMenu("Edit", state=DISABLED)
self.editMenu.addMenuItem("Find", self.findSong)
self.editMenu.addMenuItem("Delete", self.deleteSong)
# Set up the list box
self.listBox = self.addListbox(row=1,
column=0,
width=20,
listItemSelected=self.listItemSelected)
# Set the text area
self.outputArea = self.addTextArea("",
row=1,
column=1,
width=30,
height=4)
# Event handling methods
def listItemSelected(self, index):
"""Responds to the selection of an item in the list box.
Updates the selected title and the text area with the
current song's info."""
self.selectedTitle = self.listBox.getSelectedItem()
if self.selectedTitle == "":
self.outputArea.setText("")
else:
self.outputArea.setText(str(self.database[self.selectedTitle]))
def openFile(self):
"""Pops up an open file dialog. Updates the view if
a file is opened."""
filetypes = [("Database files", "*.dat")]
fileName = tkinter.filedialog.askopenfilename(parent=self,
filetypes=filetypes)
if fileName == "": return
self.database = SongDatabase(fileName)
self.listBox.clear()
for title in self.database.getTitles():
self.listBox.insert(END, title)
self.listBox.setSelectedIndex(0)
self.listItemSelected(0)
if self.listBox.size() > 0:
self.editMenu["state"] = NORMAL
else:
self.editMenu["state"] = DISABLED
def saveFile(self):
"""If the database has a file name, saves it to the file.
Otherwise, calls saveFileAs to prompt the user for a file
name."""
if self.database.fileName != "":
self.database.save()
else:
self.saveFileAs()
def saveFileAs(self):
"""Pops up a dialog to save the database to a file."""
fileName = tkinter.filedialog.asksaveasfilename(parent=self)
if fileName != "":
self.database.save(fileName)
def findSong(self):
"""Prompts the user for a title and searches for the song.
Selects and updates if found."""
title = self.prompterBox(title="Find",
promptString="Enter a song's title")
if title == "": return
song = self.database[title]
if not song:
self.messageBox(message=title + " was not found")
else:
index = self.listBox.getIndex(title)
self.listBox.setSelectedIndex(index)
self.listItemSelected(index)
def deleteSong(self):
"""Deletes the selected song from the database and updates the view."""
if self.selectedTitle:
self.database.pop(self.selectedTitle)
index = self.listBox.getSelectedIndex()
self.listBox.delete(index)
if self.listBox.size() > 0:
if index > 0:
index -= 1
self.listBox.setSelectedIndex(index)
self.listItemSelected(index)
else:
self.listItemSelected(-1)
self.editMenu["state"] = DISABLED