PyQt5 QColorDialog – 测试颜色对话框选项
在这篇文章中,我们将看到如何检查QColorDialog小组件的选项。QColorDialog小组件基本上有三个对话选项,下面是选项
1.ShowAlphaChannel : 允许用户选择颜色的alpha分量
2.NoButtons :不显示确定和取消按钮
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
默认情况下,所有选项都是禁用的,我们可以在setOption方法的帮助下设置单个选项,测试选项意味着检查给定的选项是否被启用
为了达到这个目的,我们使用QColorDialog对象的testOptions方法。
语法: dialog.testOptions(QColorDialog.ShowAlphaChannel)
参数: 它接受选项对象作为参数
返回: 如果给定的选项被启用,则返回真,否则返回假。
下面是实现方法
# 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
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)
# testing the option
value = dialog.testOption(QColorDialog.ShowAlphaChannel)
# setting text to the label
label.setText("Alpha Channel : " + str(value))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :