Implement Drag and Drop in Movie Archive

Well, this was actually a bit of a drag. You have read the docs very
carefully to get it right. For one, don't construct the drag object in
mousePressEvent if you also want a double click, otherwise you end up
with very weird behavior.

Same goes for the receiving end. Differentiate between dragEnterEvent
and dragMoveEvent, otherwise you'll only be able to drop items if you
hit the right row on entering.

There are some artefacts during the drag, but I guess that's a Qt bug.
Didn't bother to look into it.

1 files changed, 22 insertions, 1 deletions

diff --git a/archivemodel.cpp b/archivemodel.cpp
index 5369ff7..578ff5c 100644
--- a/archivemodel.cpp
+++ b/archivemodel.cpp
@@ -62,6 +62,19 @@ ArchiveModel::~ArchiveModel(){
     }
 }
 
+Qt::ItemFlags ArchiveModel::flags(const QModelIndex &index) const{
+    SmTreeItem *item = itemAt(index);
+    Qt::ItemFlags retval = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+    if(item->data(Type).toInt() == ArchiveModel::SeriesPartNode){
+        retval |= Qt::ItemIsDropEnabled;
+    }
+    return retval;
+}
+
+Qt::DropActions ArchiveModel::supportedDragActions() const{
+    return Qt::MoveAction;
+}
+
 const QStringList ArchiveModel::availableOrders() const {
     QStringList retval = mAvailableOrders.keys();
     qSort(retval);
@@ -896,7 +909,7 @@ Qt::ItemFlags ArchiveFilesModel::flags(const QModelIndex &index) const{
             return Qt::ItemIsEnabled;
         }
     }
-    return SmTreeModel::flags(index);
+    return (Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsDragEnabled);
 }
 
 int ArchiveFilesModel::nextDvd() const{
@@ -982,6 +995,14 @@ QStringList ArchiveFilesModel::filesForSeriespart(int seriesPartId) const{
     return retval;
 }
 
+void ArchiveFilesModel::updateSeriesPartForFile(const QString &md5sum, int newSeriesPart){
+    QSqlQuery q(mDb);
+    q.prepare("UPDATE files SET iseriespart_id = :id WHERE cmd5sum = :md5");
+    q.bindValue(":id", newSeriesPart);
+    q.bindValue(":md5", md5sum);
+    q.exec();
+}
+
 void ArchiveFilesModel::refresh(){
     populate(mSeriesPartIds);
 }