Details
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Bug
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Resolution: Unresolved
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P2: Important
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None
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6.8.3
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None
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Windows
Description
When setting the WA_NativeWindow on a QWebEngineView it seems to be order dependent to get the webengineview actually to render its content.
The code example below shows 3 different ways of setting the WA_NativeWindow flag and calling load(url), where the first example which is imo the expected order fails.
Example WebView 1:
- Sets WA_NativeWindow directly after the webview constructor
- Calls load(url) after flag setting
-> This order, which seems to me the natural way of setting things up, doesn't work and the webview is not rendering at all
Example WebView 2:
- Sets WA_NativeWindow directly after the webview constructor
- Calls load(url) at the very end when the dialog is already shown
-> This order works, webview is rendering
Example WebView 3:
- Calls load(url) directly after the webview constructor
- Sets WA_NativeWindow after the load(url) call
-> This order works, webview is rendering
Repro code sample:
#include <QtWidgets/QApplication> #include <QtWidgets/QtWidgets> #include <QWebEngineView> int main(int argc, char* argv[]) { QApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings); QApplication app(argc, argv); app.setQuitOnLastWindowClosed(true); // Create WebView 1 -> Not rendering! auto dlg1 = new QDialog(); dlg1->setWindowTitle("WebView 1"); auto horzLayout1 = new QHBoxLayout(dlg1); auto webView1 = new QWebEngineView(); webView1->setAttribute(Qt::WA_NativeWindow); webView1->load(QUrl("https://qt-project.org/")); // load after set WA_NativeWindow horzLayout1->addWidget(webView1); dlg1->resize(320, 200); dlg1->show(); // Create WebView 2 -> Works auto dlg2 = new QDialog(); dlg2->setWindowTitle("WebView 2"); auto horzLayout2 = new QHBoxLayout(dlg2); auto webView2 = new QWebEngineView(); webView2->setAttribute(Qt::WA_NativeWindow); horzLayout2->addWidget(webView2); dlg2->resize(320, 200); dlg2->move(dlg1->frameGeometry().bottomLeft()); dlg2->show(); webView2->load(QUrl("https://qt-project.org/")); // load after show() and WA_NativeWindow // Create WebView 3 -> Works auto dlg3 = new QDialog(); dlg3->setWindowTitle("WebView 3"); auto horzLayout3 = new QHBoxLayout(dlg3); auto webView3 = new QWebEngineView(); webView3->load(QUrl("https://qt-project.org/")); // load before set WA_NativeWindow webView3->setAttribute(Qt::WA_NativeWindow); horzLayout3->addWidget(webView3); dlg3->move(dlg2->frameGeometry().bottomLeft()); dlg3->resize(320, 200); dlg3->show(); // Run Qt message loop return app.exec(); }
