As discussed in bug 332003, there are circumstances when thumbnail data is simply not available to the WindowThumbnail component. It would be nice if the component had a property or invokable to explicitly communicate this event to users, so visualizations can react appropriately, e.g. by hiding or replacing the thumbnail component.
Assigning to Martin.
Git commit ce1ba8a6879114b35632f4f0aff4982a2b7ab719 by Kai Uwe Broulik.
Committed on 03/11/2014 at 09:11.
Pushed by broulik into branch 'master'.
Add thumbnailAvailable property to PlasmaCore.WindowThumbnail
This property tells us whether a thumbnail is actually being rendered or it has
fallen back to the window icon
M +16 -0 src/declarativeimports/core/windowthumbnail.cpp
M +6 -0 src/declarativeimports/core/windowthumbnail.h