Add a backgroundColor property

This also allows setting a transparent color to see through
the web view's body if its background color isn't specified.

The color is initially held by the top API view and is pulled
by the WebContentsAdapter in order to set it on the RenderView.
Since both blink and our local compositors (in the QOpenGLWidget
case) need to know about this color, RWHVQt takes care of pushing
it to both. The former through an IPC message and the latter
directly on the RWHVQtDelegate.

Task-number: QTBUG-41960
Change-Id: Ie13317b2d087f5612ad9c5fb0e05ca3e91aec9af
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
Reviewed-by: Andras Becsi <andras.becsi@theqtcompany.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/webengine/render_widget_host_view_qt_delegate_quick.h b/src/webengine/render_widget_host_view_qt_delegate_quick.h
index ddd0e4d9e..eb2860b27 100644
--- a/src/webengine/render_widget_host_view_qt_delegate_quick.h
+++ b/src/webengine/render_widget_host_view_qt_delegate_quick.h
@@ -70,6 +70,8 @@ public:
     virtual void move(const QPoint&) Q_DECL_OVERRIDE { }
     virtual void inputMethodStateChanged(bool editorVisible) Q_DECL_OVERRIDE;
     virtual void setTooltip(const QString&) Q_DECL_OVERRIDE { }
+    // The QtQuick view doesn't have a backbuffer of its own and doesn't need this
+    virtual void setClearColor(const QColor &) Q_DECL_OVERRIDE { }
 
 protected:
     virtual void focusInEvent(QFocusEvent *event) Q_DECL_OVERRIDE;