Qt: Workaround for Qt model() bug

model() on the TreeView should return a value, but instead returns a null
pointer. Moving the methods to the model would be the next step, but until
then, this workaround regains functionality

Change-Id: Iaa0b6470af41b297a821c0dd6e3a238481752886
Reviewed-on: https://code.wireshark.org/review/33839
Petri-Dish: Roland Knall <[email protected]>
Tested-by: Petri Dish Buildbot
Reviewed-by: Roland Knall <[email protected]>

Author: rknall

ui/qt/packet_list.cpp

@@ -96,16 +96,12 @@ packet_list_append(column_info *, frame_data *fdata)
     if (!gbl_cur_packet_list)
         return 0;
 
-    PacketListModel * model = qobject_cast<PacketListModel *>(gbl_cur_packet_list->model());
-    if ( ! model )
-        return 0;
-
     /* fdata should be filled with the stuff we need
      * strings are built at display time.
      */
     guint visible_pos;
 
-    visible_pos = model->appendPacket(fdata);
+    visible_pos = gbl_cur_packet_list->packetListModel()->appendPacket(fdata);
     return visible_pos;
 }
 
@@ -135,14 +131,10 @@ packet_list_select_row_from_data(frame_data *fdata_needle)
     if ( !gbl_cur_packet_list )
         return FALSE;
 
-    PacketListModel * model = qobject_cast<PacketListModel *>(gbl_cur_packet_list->model());
-    if ( ! model )
-        return FALSE;
-
-    model->flushVisibleRows();
-    int row = model->visibleIndexOf(fdata_needle);
+    gbl_cur_packet_list->packetListModel()->flushVisibleRows();
+    int row = gbl_cur_packet_list->packetListModel()->visibleIndexOf(fdata_needle);
     if (row >= 0) {
-        gbl_cur_packet_list->setCurrentIndex(model->index(row, 0));
+        gbl_cur_packet_list->setCurrentIndex(gbl_cur_packet_list->packetListModel()->index(row, 0));
         return TRUE;
     }
 
@@ -412,6 +404,10 @@ void PacketList::setProtoTree (ProtoTree *proto_tree) {
             &related_packet_delegate_, SLOT(addRelatedFrame(int,ft_framenum_type_t)));
 }
 
+PacketListModel *PacketList::packetListModel() const {
+    return packet_list_model_;
+}
+
 void PacketList::selectionChanged (const QItemSelection & selected, const QItemSelection & deselected)
 {
     QTreeView::selectionChanged(selected, deselected);

ui/qt/packet_list.h

@@ -33,7 +33,7 @@ class PacketList : public QTreeView
     Q_OBJECT
 public:
     explicit PacketList(QWidget *parent = 0);
-
+    PacketListModel *packetListModel() const;
     QMenu *conversationMenu() { return &conv_menu_; }
     QMenu *colorizeMenu() { return &colorize_menu_; }
     void setProtoTree(ProtoTree *proto_tree);