# -*- coding: cp936 -*-

#由于现在不是很明白：事件过滤器的使用(eventFilter)，先收藏着

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安装过滤器

        #QEvent::FocusIn(获得焦点事件)

        """

QPalette p=QPalette();  

p.setColor(QPalette::Base,Qt::green);  

ui->lineEdit1->setPalette(p);

QEvent::FocusOut失去焦点

"""

        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_())