[graphics/krita] libs/ui/widgets: Show "No Preview" for presets that don't support it

[Dmitry Kazakov]

Git commit aaf42e1328e5b4b871628da44d5831f25ee16d9b by Dmitry Kazakov, on behalf of Srirupa Datta.
Committed on 04/06/2021 at 05:05.
Pushed by dkazakov into branch 'master'.

Show "No Preview" for presets that don't support it

GUI:
BUG: 412323
FIXED IN: 5.0.0

M  +7    -4    libs/ui/widgets/kis_preset_live_preview_view.cpp

https://invent.kde.org/graphics/krita/commit/aaf42e1328e5b4b871628da44d5831f25ee16d9b

diff --git a/libs/ui/widgets/kis_preset_live_preview_view.cpp b/libs/ui/widgets/kis_preset_live_preview_view.cpp
index 24587c51fd..e57d09c252 100644
--- a/libs/ui/widgets/kis_preset_live_preview_view.cpp
+++ b/libs/ui/widgets/kis_preset_live_preview_view.cpp
@@ -159,10 +159,13 @@ void KisPresetLivePreviewView::paintBackground()
         // experimentbrush -- this creates artifacts that carry over to other previews and messes up their display
         // duplicate (clone) brush doesn't have a preview as it doesn't show anything)
 
-        if(m_sceneImageItem) {
-            this->scene()->removeItem(m_sceneImageItem);
-            m_sceneImageItem = 0;
-        }
+        // fill with gray first to clear out what existed from previous preview        
+        KisTransaction t(m_layer->paintDevice());
+        m_layer->paintDevice()->fill(m_image->bounds(), KoColor(palette().color(QPalette::Background) , m_colorSpace));
+        t.end();
+
+        m_paintColor = KoColor(palette().color(QPalette::Text), m_colorSpace);
+
         QFont font;
         font.setPixelSize(14);
         font.setBold(false);