如何连接QLineEdit focusOutEvent

Question

我在Designer的帮助下在PyQt4中设计了一个带有QLineEdit的窗口。 我使用pyuic4将.ui转换为.py 。 我创建了另一个.py文件并导入和子类化了Ui_Class 。

我想在QLineEdit失去焦点时执行一些任务。

只需按行按钮点击事件i即可连接QLineEdit Lost焦点事件

Answer 1

使用eventFilter ：

class Filter(QtCore.QObject):
    def eventFilter(self, widget, event):
        # FocusOut event
        if event.type() == QtCore.QEvent.FocusOut:
            # do custom stuff
            print 'focus out'
            # return False so that the widget will also handle the event
            # otherwise it won't focus out
            return False
        else:
            # we don't care about other events
            return False

在你的窗口：

# ...
self._filter = Filter()
# adjust for your QLineEdit
self.ui.lineEdit.installEventFilter(self._filter)