PyQt5 QColorDialog - 拒绝颜色

在本文中，我们将看到如何拒绝 QColorDialog 小部件中的颜色。隐藏模态对话框并将结果代码设置为拒绝。当用户按下“取消”按钮时也是如此。

这个方法调用完成的信号

为了做到这一点，我们使用 QColorDialog 对象的reject方法

Syntax : dialog.reject()

Argument : It takes no argument

Return : It returns None

下面是实现

# 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)
  
        # setting current color to the dialog
        dialog.setCurrentColor(Qt.red)
  
        # accepting the color
        # now color will become selected one
        dialog.accept()
  
        # rejecting the color
        dialog.reject()
  
        # 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;"
                            "}")
  
        # getting the selected color
        color = dialog.selectedColor()
  
        # 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)
  
        # setting text to the label
        label.setText("Accepted Color : " + str(color))
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：

注意：在这个实现中，我们没有执行颜色对话框，因为我们设置了当前颜色并以编程方式接受颜色将使其选择颜色而不是默认的白色，但随后调用拒绝方法，这将删除颜色，因此颜色变黑