QmlDesigner: Remove transparency from DocumentWarningWidget

The ToolTipBase has alpha in some themes (e.g. Flat Dark).
If the background of the DocumentWarningWidget is transparent,
this looks buggy. We remove the transparency by blending
the color against the background color.

Change-Id: I4a25a30700b3ee1e9e8d23d0b0bad09f297f0605
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/plugins/qmldesigner/documentwarningwidget.cpp b/src/plugins/qmldesigner/documentwarningwidget.cpp
index 12baccb7b1..50ea460b13 100644
--- a/src/plugins/qmldesigner/documentwarningwidget.cpp
+++ b/src/plugins/qmldesigner/documentwarningwidget.cpp
@@ -27,6 +27,10 @@
 
 #include <qmldesignerplugin.h>
 
+
+#include <utils/theme/theme.h>
+#include <utils/stylehelper.h>
+
 #include <QLabel>
 #include <QPushButton>
 #include <QCheckBox>
@@ -170,6 +174,13 @@ bool DocumentWarningWidget::eventFilter(QObject *object, QEvent *event)
 
 void DocumentWarningWidget::showEvent(QShowEvent *event)
 {
+    const QColor backgroundColor = Utils::creatorTheme()->color(Utils::Theme::QmlDesigner_BackgroundColor);
+    QPalette pal = palette();
+    QColor color = pal.color(QPalette::ToolTipBase);
+    const QColor backgroundNoAlpha = Utils::StyleHelper::alphaBlendedColors(color, backgroundColor);
+    color.setAlpha(255);
+    pal.setColor(QPalette::ToolTipBase, backgroundNoAlpha);
+    setPalette(pal);
     m_gotoCodeWasClicked = false;
     moveToParentCenter();
     refreshContent();