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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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6.7.2
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None
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Distribution: Manjaro
Desktop environments: Xfce, KDE Plasma (both X11 and Wayland)
Graphics driver: amdgpu
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Linux/Wayland,
When a web page is first shown in a QWebEngineView, the application window briefly disappears, then reappears in a possibly different location (e.g. top-left corner of the same or another screen or the center of the same screen). Debugging my application pinpointed the time of the window disappearance to the first QWebEnginePage::setHtml() call.
STEPS TO REPRODUCE:
1. Apply the following patch (3 diff hunks) to the Qt example recipebrowser :
diff --git a/mainwindow.cpp b/mainwindow.cpp index 7eedab4..3c8c356 100644 --- a/mainwindow.cpp +++ b/mainwindow.cpp @@ -21,6 +21,7 @@ MainWindow::MainWindow(QWidget *parent) ui->textEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont)); ui->textEdit->hide(); ui->webEngineView->setContextMenuPolicy(Qt::NoContextMenu); + ui->webEngineView->hide(); connect(ui->stylesheetsButton, &QPushButton::clicked, this, &MainWindow::showStyleSheetsDialog); connect(ui->editViewButton, &QPushButton::clicked, this, &MainWindow::toggleEditView); @@ -36,6 +37,7 @@ MainWindow::MainWindow(QWidget *parent) [this](QListWidgetItem *current, QListWidgetItem * /* previous */) { const QString page = current->text().toLower(); const QString url = QStringLiteral("qrc:/pages/") + page + QStringLiteral(".html"); + ui->webEngineView->show(); ui->webEngineView->setUrl(QUrl(url)); m_content.setCurrentPage(page); }); @@ -63,8 +65,6 @@ MainWindow::MainWindow(QWidget *parent) } } settings.endGroup(); - - ui->recipes->setCurrentItem(ui->recipes->item(0)); } MainWindow::~MainWindow()
2. Run the example.
3. (optional) Move the application window somewhere and/or resize it.
4. Select any recipe in the list.
ACTUAL RESULTS:
- the window briefly disappears and reappears in the same place or in a different place in case the 3rd optional step is not omitted;
- subsequent recipe selection does not repaint or move the application window until application restart.
EXPECTED RESULTS:
- the first recipe selection behaves the same as subsequent selections and does not repaint or move the application window.