from PyQt4 import QtCore, QtGui class MessageCompose(QtGui.QTextEdit): def __init__(self, parent = 0): super(MessageCompose, self).__init__(parent) self.setAcceptRichText(False) # we'll deal with this later when we have a new message format self.defaultFontPointSize = self.currentFont().pointSize() def wheelEvent(self, event): if (QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ControlModifier) == QtCore.Qt.ControlModifier and event.orientation() == QtCore.Qt.Vertical: if event.delta() > 0: self.zoomIn(1) else: self.zoomOut(1) zoom = self.currentFont().pointSize() * 100 / self.defaultFontPointSize QtGui.QApplication.activeWindow().statusBar().showMessage(QtGui.QApplication.translate("MainWindow", "Zoom level %1%").arg(str(zoom))) # super will actually automatically take care of zooming super(MessageCompose, self).wheelEvent(event) def reset(self): self.setText('')