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python - CSS 在 QWebEngineView.setHtml() 中不起作用

转载 作者:行者123 更新时间:2023-12-01 01:45:33 42 4
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我有一个通过渲染 Jinja 模板获得的字符串。在模板中,我有 css 文件的绝对路径。例如:

<link rel='stylesheet' href="C:\Users\User\project\reports\template\css">

但是,当我在 QWebEngineView 中设置 html 时,只显示纯 HTML,没有 CSS。我怎样才能检测CSS引用?

这是我的代码

class WidgetEdificioCirsoc(QtWidgets.QWidget):
def __init__(self):
super().__init__()

self._tab_edificio = widgets.TabEdificio()
self._webview = QtWebEngineWidgets.QWebEngineView()
layout_horizontal_principal = QtWidgets.QHBoxLayout()
layout_horizontal_principal.addWidget(self._tab_edificio)
layout_horizontal_principal.addWidget(self._webview)
self.setLayout(layout_horizontal_principal)

def calcular(self):
edificio = self._tab_edificio()
reporte = edificio.reporte.html() # Generate the string
self._webview.setHtml(reporte) # Set the string

最佳答案

QWebEngineView 当您使用 setHtml() 方法不处理 url 时,解决方法是使用 javascript 加载 css,如下所示:

.
├── main.py
└── css
└── styles.css

ma​​in.py

from PyQt5 import QtWebEngineWidgets, QtWidgets, QtCore

def loadCSS(view, path, name):
path = QtCore.QFile(path)
if not path.open(QtCore.QFile.ReadOnly | QtCore.QFile.Text):
return
css = path.readAll().data().decode("utf-8")
SCRIPT = """
(function() {
css = document.createElement('style');
css.type = 'text/css';
css.id = "%s";
document.head.appendChild(css);
css.innerText = `%s`;
})()
""" % (name, css)

script = QtWebEngineWidgets.QWebEngineScript()
view.page().runJavaScript(SCRIPT, QtWebEngineWidgets.QWebEngineScript.ApplicationWorld)
script.setName(name)
script.setSourceCode(SCRIPT)
script.setInjectionPoint(QtWebEngineWidgets.QWebEngineScript.DocumentReady)
script.setRunsOnSubFrames(True)
script.setWorldId(QtWebEngineWidgets.QWebEngineScript.ApplicationWorld)
view.page().scripts().insert(script)


HTML = """
<!DOCTYPE html>
<html>
<head>
</head>
<body>

<h1>I am formatted with a style sheet</h1>
<p>Me too!</p>

</body>
</html>
"""

if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
view = QtWebEngineWidgets.QWebEngineView()
view.setHtml(HTML, QtCore.QUrl("index.html"))

loadCSS(view, "css/styles.css", "script1")

view.show()
sys.exit(app.exec_())

css/styles.css

body {
background-color: lightblue;
}

h1 {
color: white;
text-align: center;
}

p {
font-family: verdana;
font-size: 20px;
}

enter image description here

关于python - CSS 在 QWebEngineView.setHtml() 中不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51388443/

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