PYQT Event Filter Usage (eventfilter) (not very clear)

Use of the PyQt event filter (EventFilter)

Read 13 times 2014/8/5 19:47:24

#-*-coding:cp936-*-

#由于现在不是很明白: The Use of event filters (EventFilter), the first collection

From PYQT4 import Qtgui, Qtcore

Class Window (Qtgui.qmainwindow):

def __init__ (self):

Qtgui.qmainwindow.__init__ (self)

Widget = Qtgui.qwidget (self)

Layout = Qtgui.qvboxlayout (widget)

Self.edit = Qtgui.qlineedit (self)

Self.list = Qtgui.qlistwidget (self)

Layout.addwidget (Self.edit)

Layout.addwidget (Self.list)

Self.setcentralwidget (widget)

Self.edit.installEventFilter (self) #在窗体上为self. Edit Install Filter

#QEvent:: Focusin (get focus event)

"""

Qpalette P=qpalette ();

P.setcolor (Qpalette::base,qt::green);

Ui->lineedit1->setpalette (P);

Qevent::focusout loses focus

"""

Self.list.installEventFilter (self)

def eventfilter (self, Source, event):

If event.type () = = QtCore.QEvent.MouseMove:

If event.buttons () = = QtCore.Qt.NoButton:

pos = Event.pos ()

Self.edit.setText (' x:%d, y:%d '% (pos.x (), Pos.y ()))

Else

Pass # do other stuff

Return QtGui.QMainWindow.eventFilter (self, source, event) #将事件交给上层对话框

if __name__ = = ' __main__ ':

Import Sys

App = Qtgui.qapplication (SYS.ARGV)

Win = Window ()

Win.show ()

App.installeventfilter (Win)

Sys.exit (App.exec_ ())

PYQT Event Filter Usage (eventfilter) (not very clear)