Fix D&D of group layers on windows

BUG:294195

krita/ui/kis_mimedata.cpp

@@ -36,15 +36,13 @@
 #include <QDomElement>
 #include <QTemporaryFile>
 
-KisMimeData::KisMimeData() :
-    QMimeData()
+KisMimeData::KisMimeData(KisNodeSP node)
+    : QMimeData()
+    , m_node(node)
 {
+    Q_ASSERT(m_node);
 }
 
-void KisMimeData::setNode(KisNodeSP node)
-{
-    m_node = node;
-}
 
 KisNodeSP KisMimeData::node() const
 {
@@ -63,9 +61,10 @@ QStringList KisMimeData::formats () const
 
 QVariant KisMimeData::retrieveData(const QString &mimetype, QVariant::Type preferredType) const
 {
+    Q_ASSERT(m_node);
     if (mimetype == "application/x-qt-image") {
         KisConfig cfg;
-        return m_node->paintDevice()->convertToQImage(cfg.displayProfile());
+        return m_node->projection()->convertToQImage(cfg.displayProfile());
     }
     else if (mimetype == "application/x-krita-node"
              || mimetype == "application/zip") {

krita/ui/kis_mimedata.h

@@ -33,12 +33,7 @@ class KRITAUI_EXPORT KisMimeData : public QMimeData
 {
     Q_OBJECT
 public:
-    KisMimeData();
-
-    /**
-     * Set the node this KisMimeData instance contains. There can be only one node.
-     */
-    void setNode(KisNodeSP node);
+    KisMimeData(KisNodeSP node);
 
     /// return the node set on this mimedata object -- for internal use
     KisNodeSP node() const;

krita/ui/kis_node_model.cpp

@@ -426,8 +426,8 @@ QMimeData * KisNodeModel::mimeData(const QModelIndexList &indexes) const
     Q_ASSERT(indexes.count() == 1); // we only allow one node at a time to be stored as mimedata
 
     KisNodeSP node = nodeFromIndex(indexes.first());
-    KisMimeData* data = new KisMimeData();
-    data->setNode(node);
+    KisMimeData* data = new KisMimeData(node);
+
     return data;
 }