Enable basic drag and drop support for the Places Panel

The dropping has not been implemented yet, however in the context of
this step the creating of the drag-pixmap is now forwarded to
the item-widgets. This allows creating some optimized dragging-pixmaps
e.g. for the details-view, where only the name and icon should
be provided as drag-pixmap.

2 files changed, 43 insertions, 5 deletions

diff --git a/src/panels/places/placesitemmodel.cpp b/src/panels/places/placesitemmodel.cpp
index 14ec54be8..68311bbab 100644
--- a/src/panels/places/placesitemmodel.cpp
+++ b/src/panels/places/placesitemmodel.cpp
@@ -37,6 +37,7 @@
 #include "placesitem.h"
 #include <QAction>
 #include <QDate>
+#include <QMimeData>
 #include <QTimer>
 
 #include <Solid/Device>
@@ -291,7 +292,9 @@ void PlacesItemModel::requestEject(int index)
                     this, SLOT(slotStorageTeardownDone(Solid::ErrorType,QVariant)));
             drive->eject();
         } else {
-
+            const QString label = item->text();
+            const QString message = i18nc("@info", "The device '%1' is not a disk and cannot be ejected.", label);
+            emit errorMessage(message);
         }
     }
 }
@@ -305,14 +308,43 @@ void PlacesItemModel::requestTeardown(int index)
             connect(access, SIGNAL(teardownDone(Solid::ErrorType,QVariant,QString)),
                     this, SLOT(slotStorageTeardownDone(Solid::ErrorType,QVariant)));
             access->teardown();
-        } else {
-            const QString label = item->text();
-            const QString message = i18nc("@info", "The device '%1' is not a disk and cannot be ejected.", label);
-            emit errorMessage(message);
         }
     }
 }
 
+QMimeData* PlacesItemModel::createMimeData(const QSet<int>& indexes) const
+{
+    KUrl::List urls;
+    QByteArray itemData;
+
+    QDataStream stream(&itemData, QIODevice::WriteOnly);
+
+    foreach (int index, indexes) {
+        const KUrl itemUrl = placesItem(index)->url();
+        if (itemUrl.isValid()) {
+            urls << itemUrl;
+        }
+        stream << index;
+    }
+
+    QMimeData* mimeData = new QMimeData();
+    if (!urls.isEmpty()) {
+        urls.populateMimeData(mimeData);
+    }
+
+    const QString internalMimeType = "application/x-dolphinplacesmodel-" +
+                                     QString::number((qptrdiff)this);
+    mimeData->setData(internalMimeType, itemData);
+
+    return mimeData;
+}
+
+bool PlacesItemModel::supportsDropping(int index) const
+{
+    Q_UNUSED(index);
+    return true;
+}
+
 KUrl PlacesItemModel::convertedUrl(const KUrl& url)
 {
     KUrl newUrl = url;
diff --git a/src/panels/places/placesitemmodel.h b/src/panels/places/placesitemmodel.h
index 0f8f3025d..7225c04f4 100644
--- a/src/panels/places/placesitemmodel.h
+++ b/src/panels/places/placesitemmodel.h
@@ -105,6 +105,12 @@ public:
     void requestEject(int index);
     void requestTeardown(int index);
 
+    /** @reimp */
+    virtual QMimeData* createMimeData(const QSet<int>& indexes) const;
+
+    /** @reimp */
+    virtual bool supportsDropping(int index) const;
+
     /**
      * @return Converts the URL, which contains "virtual" URLs for system-items like
      *         "search:/documents" into a Nepomuk-Query-URL that will be handled by