Python 如何将样式表应用于 PyQt 中的自定义小部件

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时间:2020-08-19 01:04:11  来源:igfitidea点击:

How to apply style sheet to a custom widget in PyQt

pythonpyqtpyqt5pyqt4qtstylesheets

提问by Anke_Pet

# -*- coding: utf-8 -*-

import sys
from PyQt4.QtGui import *  
from PyQt4.QtCore import * 

class MainWindow(QWidget):
    def __init__(self):
        super(MainWindow, self).__init__()

        self.setFixedWidth(200)
        self.setFixedHeight(200)

        stylesheet = \
            ".QWidget {\n" \
            + "border: 20px solid black;\n" \
            + "border-radius: 4px;\n" \
            + "background-color: rgb(255, 255, 255);\n" \
            + "}"
        self.setStyleSheet(stylesheet)

if __name__ == '__main__':

    app = QApplication(sys.argv)
    main = MainWindow()
    main.show()
    sys.exit(app.exec_())

I want to add a border to a custom widget with style sheet, but the style sheet does not seem to work, anything wrong?

我想为带有样式表的自定义小部件添加边框,但样式表似乎不起作用,有什么问题吗?

采纳答案by ekhumoro

Firstly: add an actual widget to your example:

首先:在您的示例中添加一个实际的小部件:

    self.widget = QWidget(self)
    layout = QVBoxLayout(self)
    layout.addWidget(self.widget)

Secondly: do yourself a favour, and use triple-quotes:

其次:帮自己一个忙,并使用三重引号:

    self.widget.setStyleSheet("""
        QWidget {
            border: 20px solid black;
            border-radius: 10px;
            background-color: rgb(255, 255, 255);
            }
        """)

The dot-selector in your example is redundant. What it does is specify that only instances of QWidgetitself will be selected, as opposed to sub-classes of QWidget. See the StyleSheet Syntaxguide in the Qt docs.

您示例中的点选择器是多余的。它的作用是指定仅QWidget选择其自身的实例,而不是QWidget. 请参阅Qt 文档中的样式表语法指南。

回答by Eric Petersen

In your project folder add a basic CSS file mystylesheet.css. Mutli-language editors like Atom are best for this type of things. The syntax highlighting works properly if you keep it named a CSS file.

在您的项目文件夹中添加一个基本的 CSS 文件 mystylesheet.css。像 Atom 这样的多语言编辑器最适合这类事情。如果将其命名为 CSS 文件,则语法突出显示可以正常工作。

Then drop the dot; qt knows what you mean.

然后放下点;qt 知道你的意思。

mystylesheet.css

mystylesheet.css

QWidget {
    border: 20px solid black;
    border-radius: 10px;
    background-color: rgb(255, 255, 255);
}
anyQelement.setStyleSheet(open('mystylesheet.css').read())