Class view: Add drag & drop onto editor splits

Change-Id: I35bc03d4e963500a7edf37d6f9d0ddd0a6c68529
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/classview/classviewtreeitemmodel.cpp

@@ -34,6 +34,7 @@
 #include "classviewutils.h"
 
 #include <cplusplus/Icons.h>
+#include <utils/fileutils.h>
 
 namespace ClassView {
 namespace Internal {
@@ -133,6 +134,35 @@ bool TreeItemModel::hasChildren(const QModelIndex &parent) const
     return Manager::instance()->hasChildren(itemFromIndex(parent));
 }
 
+Qt::DropActions TreeItemModel::supportedDragActions() const
+{
+    return Qt::MoveAction | Qt::CopyAction;
+}
+
+QStringList TreeItemModel::mimeTypes() const
+{
+    return ::Utils::FileDropSupport::mimeTypesForFilePaths();
+}
+
+QMimeData *TreeItemModel::mimeData(const QModelIndexList &indexes) const
+{
+    auto mimeData = new ::Utils::FileDropMimeData;
+    mimeData->setOverrideFileDropAction(Qt::CopyAction);
+    foreach (const QModelIndex &index, indexes) {
+        const QSet<SymbolLocation> locations = Utils::roleToLocations(
+                    data(index, Constants::SymbolLocationsRole).toList());
+        if (locations.isEmpty())
+            continue;
+        const SymbolLocation loc = *locations.constBegin();
+        mimeData->addFile(loc.fileName(), loc.line(), loc.column());
+    }
+    if (mimeData->files().isEmpty()) {
+        delete mimeData;
+        return 0;
+    }
+    return mimeData;
+}
+
 /*!
    Moves the root item to the \a target item.
 */