如何連接QLineEdit focusOutEvent

Question

我在Designer的幫助下在PyQt4中設計了一個帶有QLineEdit的窗口。 我使用pyuic4將.ui轉換為.py 。 我創建了另一個.py文件並導入和子類化了Ui_Class 。

我想在QLineEdit失去焦點時執行一些任務。

只需按行按鈕點擊事件i即可連接QLineEdit Lost焦點事件

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)