ProjectTree: Support dragging files onto editor splits

Change-Id: I26e4de2818d89c012526116851d67155d3eeaa7e
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/projectexplorer/projectmodels.cpp

@@ -38,8 +38,9 @@
 
 #include <QDebug>
 #include <QFileInfo>
-
 #include <QFont>
+#include <QMimeData>
+#include <QUrl>
 
 namespace ProjectExplorer {
 
@@ -334,6 +335,8 @@ Qt::ItemFlags FlatModel::flags(const QModelIndex &index) const
             // either folder or file node
             if (node->supportedActions(node).contains(ProjectExplorer::Rename))
                 f = f | Qt::ItemIsEditable;
+            if (qobject_cast<FileNode *>(node))
+                f = f | Qt::ItemIsDragEnabled;
         }
     }
     return f;
@@ -486,6 +489,24 @@ void FlatModel::reset()
     endResetModel();
 }
 
+QStringList FlatModel::mimeTypes() const
+{
+    return QStringList() << QStringLiteral("text/uri-list");
+}
+
+QMimeData *FlatModel::mimeData(const QModelIndexList &indexes) const
+{
+    QList<QUrl> urls;
+    foreach (const QModelIndex &index, indexes) {
+        Node *node = nodeForIndex(index);
+        if (qobject_cast<FileNode *>(node))
+            urls.append(QUrl::fromLocalFile(node->path()));
+    }
+    auto data = new QMimeData;
+    data->setUrls(urls);
+    return data;
+}
+
 QModelIndex FlatModel::indexForNode(const Node *node_)
 {
     // We assume that we are only called for nodes that are represented

src/plugins/projectexplorer/projectmodels.h

@@ -65,6 +65,9 @@ public:
 
     void reset();
 
+    QStringList mimeTypes() const;
+    QMimeData *mimeData(const QModelIndexList &indexes) const;
+
     void setStartupProject(ProjectNode *projectNode);
 
     ProjectExplorer::Node *nodeForIndex(const QModelIndex &index) const;

src/plugins/projectexplorer/projecttreewidget.cpp

@@ -87,6 +87,8 @@ public:
     {
         setEditTriggers(QAbstractItemView::EditKeyPressed);
         setContextMenuPolicy(Qt::CustomContextMenu);
+        setDragEnabled(true);
+        setDragDropMode(QAbstractItemView::DragOnly);
         m_context = new IContext(this);
         m_context->setContext(Context(ProjectExplorer::Constants::C_PROJECT_TREE));
         m_context->setWidget(this);