PyQt5 QColorDialog – 完成的信号

在本文中，我们将看到如何获得 QColorDialog 小部件的完成信号。当用户或通过调用 done()、accept() 或 reject() 设置对话框的结果代码时，会发出此信号。注意：使用 hide() 或 setVisible(false) 隐藏对话框时不会发出此信号。这包括在对话框可见时将其删除。为了做到这一点，我们使用带有 QColorDialog 对象的完成方法

Syntax : dialog.finished.connect(lambda: print(“Finished Signal”) Argument : It takes method as argument Action Performed : It will call the passed method when finished signal emitted

下面是实现

Python3

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import * import sys
 
 
class Window(QMainWindow):
 
    def __init__(self):
        super().__init__()
 
        # setting title
        self.setWindowTitle("Python ")
 
        # setting geometry
        self.setGeometry(100, 100, 500, 400)
 
        # calling method
        self.UiComponents()
 
        # showing all the widgets
        self.show()
 
 
    # method for components
    def UiComponents(self):
 
        # creating a QColorDialog object
        dialog = QColorDialog(self)
 
        # getting finished signal
        # printing message when signal received
        dialog.finished.connect(lambda: print("Finieshed Signal Emitted"))
 
        # executing the dialog
        dialog.exec_()
 
 
        # creating label
        label = QLabel("GeeksforGeeks", self)
 
        # setting geometry to the label
        label.setGeometry(100, 100, 300, 80)
 
        # making label multi line
        label.setWordWrap(True)
 
        # setting stylesheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 5px solid black;"
                            "}")
 
        color = Qt.black
 
        # setting graphic effect to the label
        graphic = QGraphicsColorizeEffect(self)
 
        # setting color to the graphic
        graphic.setColor(color)
 
        # setting graphic to the label
        label.setGraphicsEffect(graphic)
 
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

输出 ：

Finieshed Signal Emitted