PyQt4 - 小部件未显示

发布于 2024-08-16 22:42:15 字数 778 浏览 2 评论 0原文

我用 Python 和 Qt4 编写了这个程序。

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore


color = QtGui.QColor(99, 0, 0)

class colorButton(QtGui.QWidget):
    def __init__(self, args):
        QtGui.QWidget.__init__(self,args)
        self.setGeometry(150, 22, 50, 50)
        self.setStyleSheet("QWidget { background-color: %s }" % color.name())

class ColorDialog(QtGui.QWidget):
    def __init__(self, parent=None):

        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(40, 40, 220, 100)
        self.setWindowTitle('ColorDialog')

        button=colorButton(self)


app = QtGui.QApplication(sys.argv)
cd = ColorDialog()
cd.show()
app.exec_()

解释器没有给我任何错误，但没有显示“彩色”小部件。为什么？感谢

原文

I've made this program in Python and Qt4.

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore


color = QtGui.QColor(99, 0, 0)

class colorButton(QtGui.QWidget):
    def __init__(self, args):
        QtGui.QWidget.__init__(self,args)
        self.setGeometry(150, 22, 50, 50)
        self.setStyleSheet("QWidget { background-color: %s }" % color.name())

class ColorDialog(QtGui.QWidget):
    def __init__(self, parent=None):

        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(40, 40, 220, 100)
        self.setWindowTitle('ColorDialog')

        button=colorButton(self)


app = QtGui.QApplication(sys.argv)
cd = ColorDialog()
cd.show()
app.exec_()

The intrpreter doesn't give me any error, but the "colored" widget isn't shown. Why?
thank

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你的往事 2024-08-23 22:42:15

您的类 colorButton 继承自 QWidget，但您在构造函数中调用 QPushButton.__init__()。也许您希望它继承自QPushButton？

通过使用以下类定义，您的代码对我有用：

class colorButton(QtGui.QPushButton):
    def __init__(self, *args):
        QtGui.QPushButton.__init__(self, *args)
        self.setGeometry(150, 22, 50, 50)
        self.setStyleSheet("QWidget { background-color: %s }" % color.name())

Your class colorButton inherits from QWidget, yet you are calling QPushButton.__init__() in the constructor. Maybe you want it to inherit from QPushButton?

By using the following class definition, your code works for me:

class colorButton(QtGui.QPushButton):
    def __init__(self, *args):
        QtGui.QPushButton.__init__(self, *args)
        self.setGeometry(150, 22, 50, 50)
        self.setStyleSheet("QWidget { background-color: %s }" % color.name())

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甜柠檬 2024-08-23 22:42:15

您需要为小部件提供一个paintEvent。

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore


color = QtGui.QColor(99, 0, 0)

class colorButton(QtGui.QWidget):
    def __init__(self, args):
        QtGui.QWidget.__init__(self,args)
        self.setGeometry(150, 22, 50, 50)

    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        painter.fillRect(event.rect(), color)

class ColorDialog(QtGui.QWidget):
    def __init__(self, parent=None):

        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(40, 40, 220, 100)
        self.setWindowTitle('ColorDialog')

        button=colorButton(self)


app = QtGui.QApplication(sys.argv)
cd = ColorDialog()
cd.show()
app.exec_()

You need to give the widget a paintEvent.

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore


color = QtGui.QColor(99, 0, 0)

class colorButton(QtGui.QWidget):
    def __init__(self, args):
        QtGui.QWidget.__init__(self,args)
        self.setGeometry(150, 22, 50, 50)

    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        painter.fillRect(event.rect(), color)

class ColorDialog(QtGui.QWidget):
    def __init__(self, parent=None):

        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(40, 40, 220, 100)
        self.setWindowTitle('ColorDialog')

        button=colorButton(self)


app = QtGui.QApplication(sys.argv)
cd = ColorDialog()
cd.show()
app.exec_()

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如若梦似彩虹 2024-08-23 22:42:15

在更改颜色之前（在 setStylesheet 调用之前）尝试将 autoFillBackground 设置为 True。我认为你需要设置调色板。此评论假设您的意思是“小部件的颜色未显示”。请检查语法，因为下面所示的语法适用于 Qt4.3，我没有检查最新的语法。设置托盘后，无需设置样式表。

class colorButton(QtGui.QWidget)
    def __init__(self, args):
        QtGui.QPushButton.__init__(self,args)
        self.setGeometry(150, 22, 50, 50)


    self.setAutoFillBackground(True)
    plt = QtGui.QPalette()      
    plt.setColor(QtGui.QPalette.Active,QtGui.QPalette.Window,color)
    plt.setColor(QtGui.QPalette.Inactive,QtGui.QPalette.Window,color)  
    plt.setColor(QtGui.QPalette.Disabled,QtGui.QPalette.Window,color
    self.setPalette(plt) 


    #self.setStyleSheet("QWidget { background-color: %s }" % color.name())

Try setting autoFillBackground to True before you change the color (before setStylesheet call). AND I think you need to set the pallete. This comment assumes that you meant "the color of the widget is not shown". Please review the syntax as the one illustrated below is for Qt4.3 and I didn't check the latest one. After you set the pallet, there is no need to set the stylesheet.

class colorButton(QtGui.QWidget)
    def __init__(self, args):
        QtGui.QPushButton.__init__(self,args)
        self.setGeometry(150, 22, 50, 50)


    self.setAutoFillBackground(True)
    plt = QtGui.QPalette()      
    plt.setColor(QtGui.QPalette.Active,QtGui.QPalette.Window,color)
    plt.setColor(QtGui.QPalette.Inactive,QtGui.QPalette.Window,color)  
    plt.setColor(QtGui.QPalette.Disabled,QtGui.QPalette.Window,color
    self.setPalette(plt) 


    #self.setStyleSheet("QWidget { background-color: %s }" % color.name())

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