你好,我有一个QWidget,如果单击它,我想获取该对象(我单击的QWidget元素)吗?
我已经找到了一些代码,但是我只能从
获取MouseClickEvent。self.widget_34.mouseReleaseEvent = lambda事件:self.myfunction(event)
答案 0 :(得分:1)
尽管@Cin提供的解决方案很有趣,但是它存在一个严重的问题:它取消了小部件的mousePressEvent,因此小部件失去了按下小部件时可能具有的行为,例如按钮no不再发出点击信号,其他小部件也将遇到相同的问题。
一种不太麻烦的解决方案是使用eventFilter:
import sys
import weakref
from PyQt5 import QtCore, QtWidgets
class ClickListener(QtCore.QObject):
clicked = QtCore.pyqtSignal(QtWidgets.QWidget)
def addWidget(self, widget, other_widget=None):
if not hasattr(self, "_widgets"):
self._widgets = {}
widget.installEventFilter(self)
self._widgets[widget] = widget if other_widget is None else other_widget
weakref.ref(widget, self.removeWidget)
def eventFilter(self, obj, event):
if (
obj in self._widgets
and event.type() == QtCore.QEvent.MouseButtonPress
):
self.clicked.emit(self._widgets[obj])
return super(ClickListener, self).eventFilter(obj, event)
def removeWidget(self, widget):
if hasattr(self, "_widgets"):
if widget in self._widgets:
del self._widgets[widget]
class App(QtWidgets.QWidget):
def __init__(self):
super().__init__()
button = QtWidgets.QPushButton("Press Me")
label = QtWidgets.QLabel("Stack Overflow")
spinBox = QtWidgets.QSpinBox()
te = QtWidgets.QTextEdit()
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(button)
lay.addWidget(label)
lay.addWidget(spinBox)
lay.addWidget(te)
listener = ClickListener(self)
listener.clicked.connect(self.onClicked)
listener.addWidget(button)
listener.addWidget(label)
listener.addWidget(spinBox.lineEdit(), spinBox)
listener.addWidget(te.viewport(), te)
def onClicked(self, obj):
print("Clicked, from", obj)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
ex = App()
ex.show()
sys.exit(app.exec_())
答案 1 :(得分:0)
我不确定这是否是一个合适的解决方案,但我认为您可以使用 functools 模块的部分方法。就此模块而言,可伸缩对象可被视为函数。在这里您可以看到我的示例,
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QLabel
import functools
class App(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.setGeometry(200,200,200,200)
self.button = QPushButton('Button', self)
self.button.move(50,50)
self.label = QLabel(self)
self.label.setText("Label")
self.label.move(100,100)
self.items = [self.button, self.label]
for i in self.items:
i.mousePressEvent = functools.partial(self.getClickedItem, source_object=i)
self.show()
def getClickedItem(self, event, source_object=None):
print("Clicked, from", source_object)
#item text
#print(source_object.text())
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())