PyQt5 QColorDialog – 设置颜色对话框选项

在这篇文章中，我们将看到如何设置QColorDialog小部件的选项。QColorDialog小组件基本上有三个对话框选项，下面是这些选项
1. ShowAlphaChannel : 允许用户选择颜色的alpha分量
2. NoButtons : 不显示OK和Cancel按钮
3. DontUseNativeDialog : 使用Qt的标准颜色对话框而不是操作系统的本地颜色对话框。

为了做到这一点，我们使用QColorDialog对象的setOption方法

语法： dialog.setOption(QColorDialog.ShowAlphaChannel)

参数： 它接受选项对象作为参数

返回： 它返回无。

以下是实现方法

# 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 option
        dialog.setOption(QColorDialog.ShowAlphaChannel)
  
        # executing the dialog
        dialog.exec_()
  
  
        # creating label to display the color
        label = QLabel("GfG", self)
  
        # setting geometry to the label
        label.setGeometry(100, 100, 200, 60)
  
        # making label multi line
        label.setWordWrap(True)
  
        # setting stylesheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 5px solid black;"
                            "}")
  
        color = Qt.green
  
        # 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())