def _construct_UI(self):
"""
Construct the main GUI, consisting of:
- Tabbed input widgets (left side)
- Tabbed plot widgets (right side)
- Logger window (right side, below plot tab)
"""
# ============== UI Layout with H and V-Splitter =====================
inputTabWidgets = input_tab_widgets.InputTabWidgets(
self) # input widgets
pltTabWidgets = plot_tab_widgets.PlotTabWidgets(self) # plot widgets
self.loggerWin = QPlainTextEdit(self) # logger window
self.loggerWin.setReadOnly(True)
# set custom right-button context menu policy
self.loggerWin.setContextMenuPolicy(Qt.CustomContextMenu)
self.loggerWin.customContextMenuRequested.connect(
self.logger_win_context_menu)
# create context menu and define actions and shortcuts
self.popMenu = QMenu(self)
self.popMenu.addAction('Select &All', self.loggerWin.selectAll,
"Ctrl+A")
self.popMenu.addAction('&Copy Selected', self.loggerWin.copy)
self.popMenu.addSeparator()
self.popMenu.addAction('Clear &Window', self.loggerWin.clear)
# =============================================================================
# add logger window underneath plot Tab Widgets
spltVPltLogger = QSplitter(QtCore.Qt.Vertical)
spltVPltLogger.addWidget(pltTabWidgets)
spltVPltLogger.addWidget(self.loggerWin)
# create horizontal splitter that contains all subwidget groups
spltHMain = QSplitter(QtCore.Qt.Horizontal)
spltHMain.addWidget(inputTabWidgets)
spltHMain.addWidget(spltVPltLogger)
spltHMain.setStretchFactor(1,
4) # relative initial sizes of subwidgets
spltHMain.setContentsMargins(*rc.params['wdg_margins'])
spltHMain.setFocus()
# make spltHMain occupy the main area of QMainWindow and make QMainWindow its parent !!!
self.setCentralWidget(spltHMain)
spltVPltLoggerH = spltVPltLogger.size().height()
spltVPltLogger.setSizes(
[int(spltVPltLoggerH * 0.95),
int(spltVPltLoggerH * 0.05 - 8)])
self.setWindowTitle('pyFDA - Python Filter Design and Analysis')
#=============== Menubar =======================================
# aboutAction = QAction('&About', self)
# aboutAction.setShortcut('Ctrl+A')
# aboutAction.setStatusTip('Info about pyFDA')
#
# menubar = self.menuBar()
# fileMenu = menubar.addMenu('&About')
# fileMenu.addAction(aboutAction)
# self.statusMessage("Application is initialized.")
#----------------------------------------------------------------------
# GLOBAL SIGNALS & SLOTs
#----------------------------------------------------------------------
self.sig_rx.connect(self.process_sig_rx)
#----------------------------------------------------------------------
# SIGNALS & SLOTs
#----------------------------------------------------------------------
# Here, signals about spec and design changes from lower hierarchies
# are distributed. At the moment, only changes in the input widgets are
# routed to the plot widgets:
inputTabWidgets.sig_tx.connect(pltTabWidgets.sig_rx)
inputTabWidgets.sig_tx.connect(self.process_sig_rx)
pltTabWidgets.sig_tx.connect(inputTabWidgets.sig_rx)
# open pop-up "about" window
#aboutAction.triggered.connect(self.aboutWindow)
# trigger the close event in response to sigQuit generated in another subwidget:
# inputTabWidgets.input_filter_specs.sigQuit.connect(self.close)
# when a message has been written, pass it via signal-slot mechanism and
# print it to logger window
XStream.stdout().messageWritten.connect(self.loggerWin.appendHtml)
class pyFDA(QMainWindow):
"""
Create the main window consisting of a tabbed widget for entering filter
specifications, poles / zeros etc. and another tabbed widget for plotting
various filter characteristics
QMainWindow is used here as it is a class that understands GUI elements like
toolbar, statusbar, central widget, docking areas etc.
"""
sig_rx = pyqtSignal(object) # incoming
# sig_tx = pyqtSignal(object) # outgoing
def __init__(self, parent=None):
super(QMainWindow, self).__init__()
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
# create clipboard instance that can be accessed from other modules
fb.clipboard = QApplication.clipboard()
# initialize the FilterTreeBuilder class:
# read config file and construct filter tree from it
_ = Tree_Builder() # TODO_ couldn't this be a function?
self._construct_UI()
def _construct_UI(self):
"""
Construct the main GUI, consisting of:
- Tabbed input widgets (left side)
- Tabbed plot widgets (right side)
- Logger window (right side, below plot tab)
"""
# ============== UI Layout with H and V-Splitter =====================
inputTabWidgets = input_tab_widgets.InputTabWidgets(
self) # input widgets
pltTabWidgets = plot_tab_widgets.PlotTabWidgets(self) # plot widgets
self.loggerWin = QPlainTextEdit(self) # logger window
self.loggerWin.setReadOnly(True)
# set custom right-button context menu policy
self.loggerWin.setContextMenuPolicy(Qt.CustomContextMenu)
self.loggerWin.customContextMenuRequested.connect(
self.logger_win_context_menu)
# create context menu and define actions and shortcuts
self.popMenu = QMenu(self)
self.popMenu.addAction('Select &All', self.loggerWin.selectAll,
"Ctrl+A")
self.popMenu.addAction('&Copy Selected', self.loggerWin.copy)
self.popMenu.addSeparator()
self.popMenu.addAction('Clear &Window', self.loggerWin.clear)
# =============================================================================
# add logger window underneath plot Tab Widgets
spltVPltLogger = QSplitter(QtCore.Qt.Vertical)
spltVPltLogger.addWidget(pltTabWidgets)
spltVPltLogger.addWidget(self.loggerWin)
# create horizontal splitter that contains all subwidget groups
spltHMain = QSplitter(QtCore.Qt.Horizontal)
spltHMain.addWidget(inputTabWidgets)
spltHMain.addWidget(spltVPltLogger)
spltHMain.setStretchFactor(1,
4) # relative initial sizes of subwidgets
spltHMain.setContentsMargins(*rc.params['wdg_margins'])
spltHMain.setFocus()
# make spltHMain occupy the main area of QMainWindow and make QMainWindow its parent !!!
self.setCentralWidget(spltHMain)
spltVPltLoggerH = spltVPltLogger.size().height()
spltVPltLogger.setSizes(
[int(spltVPltLoggerH * 0.95),
int(spltVPltLoggerH * 0.05 - 8)])
self.setWindowTitle('pyFDA - Python Filter Design and Analysis')
#=============== Menubar =======================================
# aboutAction = QAction('&About', self)
# aboutAction.setShortcut('Ctrl+A')
# aboutAction.setStatusTip('Info about pyFDA')
#
# menubar = self.menuBar()
# fileMenu = menubar.addMenu('&About')
# fileMenu.addAction(aboutAction)
# self.statusMessage("Application is initialized.")
#----------------------------------------------------------------------
# GLOBAL SIGNALS & SLOTs
#----------------------------------------------------------------------
self.sig_rx.connect(self.process_sig_rx)
#----------------------------------------------------------------------
# SIGNALS & SLOTs
#----------------------------------------------------------------------
# Here, signals about spec and design changes from lower hierarchies
# are distributed. At the moment, only changes in the input widgets are
# routed to the plot widgets:
inputTabWidgets.sig_tx.connect(pltTabWidgets.sig_rx)
inputTabWidgets.sig_tx.connect(self.process_sig_rx)
pltTabWidgets.sig_tx.connect(inputTabWidgets.sig_rx)
# open pop-up "about" window
#aboutAction.triggered.connect(self.aboutWindow)
# trigger the close event in response to sigQuit generated in another subwidget:
# inputTabWidgets.input_filter_specs.sigQuit.connect(self.close)
# when a message has been written, pass it via signal-slot mechanism and
# print it to logger window
XStream.stdout().messageWritten.connect(self.loggerWin.appendHtml)
#------------------------------------------------------------------------------
def process_sig_rx(self, dict_sig=None):
"""
Process signals coming from sig_rx:
- trigger close event in response to 'quit_program' emitted in another subwidget:
"""
logger.debug("Processing {0}: {1}".format(
type(dict_sig).__name__, dict_sig))
if 'quit_program' in dict_sig:
self.close()
#==============================================================================
# def statusMessage(self, message):
# """
# Display a message in the statusbar.
# """
# self.statusBar().showMessage(message)
#
#
#==============================================================================
def logger_win_context_menu(self, point):
""" Show right mouse button context menu """
self.popMenu.exec_(self.loggerWin.mapToGlobal(point))
# =============================================================================
def closeEvent(self, event):
"""
reimplement QMainWindow.closeEvent() to prompt the user
"""
reply = QMessageBox.question(self, 'Message', "Quit pyFDA?",
QMessageBox.Yes, QMessageBox.No)
if reply == QMessageBox.Yes:
# Clear clipboard before exit to avoid error message on older Qt versions
# "QClipboard: Unable to receive an event from the clipboard manager
# in a reasonable time
fb.clipboard.clear()
event.accept()
else:
event.ignore()