BUG:328879 Update the channel docker when changing image colorspace

krita/plugins/extensions/dockers/channeldocker/channeldocker_dock.cpp

@@ -31,6 +31,7 @@
 #include <kis_image.h>
 #include <kis_group_layer.h>
 #include <kis_layer.h>
+#include <kis_paint_device.h>
 
 
 ChannelDockerDock::ChannelDockerDock( ) : QDockWidget(i18n("Channels")), m_canvas(0)
@@ -56,7 +57,10 @@ void ChannelDockerDock::setCanvas(KoCanvasBase * canvas)
     if (m_canvas) {
         KisView2* view = m_canvas->view();
         m_model->slotLayerActivated(view->image()->rootLayer());
+        KisPaintDeviceSP dev = view->image()->projection();
+        connect(dev, SIGNAL(colorSpaceChanged(const KoColorSpace*)), m_model, SLOT(slotColorSpaceChanged(const KoColorSpace*)));
     }
+
     connect(m_model, SIGNAL(channelFlagsChanged()), m_canvas, SLOT(channelSelectionChanged()));
 }
 

krita/plugins/extensions/dockers/channeldocker/channelmodel.cpp

@@ -124,8 +124,14 @@ Qt::ItemFlags ChannelModel::flags(const QModelIndex& /*index*/) const
 
 void ChannelModel::slotLayerActivated(KisLayerSP layer)
 {
+    beginResetModel();
     m_currentLayer = layer;
-    reset();
+    endResetModel();
+}
+
+void ChannelModel::slotColorSpaceChanged(const KoColorSpace */*colorSpace*/)
+{
+    slotLayerActivated(m_currentLayer);
 }
 
 #include "channelmodel.moc"

krita/plugins/extensions/dockers/channeldocker/channelmodel.h

@@ -20,6 +20,8 @@
 
 #include <QModelIndex>
 
+class KoColorSpace;
+
 #include <kis_types.h>
 
 class ChannelModel : public QAbstractTableModel
@@ -38,6 +40,7 @@ public:
 
 public slots:
     void slotLayerActivated(KisLayerSP layer);
+    void slotColorSpaceChanged(const KoColorSpace *colorSpace);
 signals:
     void channelFlagsChanged();
 private: