davidre added a comment.
The reason it's transparent is because the clear color of the buffer is set to the background color when it's changed [1][2]. This worked before probably because the Color was (0, 0, 0). For transparent windows we need to set it to `Qt::transparent`[3] and enable an alpha buffer[4]. F7309362: Screenshot_20190902_171545.png <https://phabricator.kde.org/F7309362> diff --git a/applets/kicker/plugin/dashboardwindow.cpp b/applets/kicker/plugin/dashboardwindow.cpp index 6665e8df7..cc6b70c32 100644 --- a/applets/kicker/plugin/dashboardwindow.cpp +++ b/applets/kicker/plugin/dashboardwindow.cpp @@ -32,6 +32,8 @@ DashboardWindow::DashboardWindow(QQuickItem *parent) : QQuickWindow(parent ? par , m_visualParentWindow(nullptr) { setClearBeforeRendering(true); + setDefaultAlphaBuffer(true); + setColor(Qt::transparent); setFlags(Qt::FramelessWindowHint); setIcon(QIcon::fromTheme(QStringLiteral("plasma"))); @@ -100,8 +102,6 @@ QColor DashboardWindow::backgroundColor() const void DashboardWindow::setBackgroundColor(const QColor &c) { if (color() != c) { - setColor(c); - emit backgroundColorChanged(); } } [1] https://cgit.kde.org/plasma-desktop.git/tree/applets/kicker/plugin/dashboardwindow.cpp#n103 [2]https://doc.qt.io/qt-5/qquickwindow.html#color-prop [3]https://doc.qt.io/qt-5/qquickwidget.html#details (see Limitations) [4]https://doc.qt.io/qt-5/qquickwindow.html#setDefaultAlphaBuffer REPOSITORY R119 Plasma Desktop REVISION DETAIL https://phabricator.kde.org/D23651 To: ognarb, #plasma, #vdg Cc: davidre, felixernst, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
