An MWE demoing the problem is this:
#include <QMainWindow>
#include <QApplication>
#include <QWidget>
#include <QWebEngineView>
#include <QGridLayout>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QMainWindow w;
auto w1 = new QWidget();
w1->setLayout(new GridLayout());
auto view = new QWebEngineView();
view->load(QUrl("file://C:\\Users\\FruitfulApproach\\Desktop\\AbstractSpacecraft\\MathEnglishApp\\KaTeX_template.html"));
view->show();
w1->layout()->addWidget(view);
w.setCentralWidget(w1);
w.show();
return a.exec();
}
KaTeX_template.html:
<!DOCTYPE html>
<html>
<head>
<title>MathJax TeX Test Page</title>
<script type="text/x-mathjax-config">
MathJax.Hub.Config({tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]}});
</script>
<script type="text/javascript" async
src="https://example.com/mathjax/MathJax.js?config=TeX-AMS_CHTML">
</script>
</head>
<body>
When $a \ne 0$, there are two solutions to \(ax^2 + bx + c = 0\) and they are
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
</body>
</html>
You have to type in the correct file path in the first code listing.
Anyway, it’s not the template, because I put some plain text inside of the template and the same thing happens.
What I expected was for QWebEngineView to be able to load a local file. I’ve tried playing around with the filepath string using forward instead of back-slashes, each change from what it is produce a "File not found" in the web view display.
What happens currently is that the QWebEngineView is just displaying blank white. When you right-click on the view you can try reload or view source and nothing happens.
I’ve tried loading an online webpage and that works.
>Solution :
If you want to create a QUrl using a file path then use QUrl::fromLocalFile():
view->load(QUrl::fromLocalFile("C:\\Users\\FruitfulApproach\\Desktop\\AbstractSpacecraft\\MathEnglishApp\\KaTeX_template.html"));