如何连接 QLineEdit focusOutEvent [英] How to connect QLineEdit focusOutEvent

问题描述

我在设计器的帮助下在 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 Ui_Class.

I have designed a window with a QLineEdit in PyQt4 with the help of Designer. I converted .ui to .py using pyuic4. I created another .py file and imported and subclassed Ui_Class.

我想在 QLineEdit 失去焦点时执行一些任务.

I want to perform some task when QLineEdit lost focus.

仅行按钮单击事件 i 连接 QLineEdit 失去焦点事件

Just line button clicked event i to connect QLineEdit Lost focus event

推荐答案

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

在您的窗口中:

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

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