private void GroupsTree_DragMotion(object o, DragMotionArgs args)
{
TreePath path;
TreeViewDropPosition pos;
if (BusinessDomain.LoggedUser.UserLevel == UserAccessLevel.Operator ||
!groupsTree.GetDestRowAtPos(args.X, args.Y, out path, out pos))
{
args.RetVal = false;
return;
}
if (Drag.GetSourceWidget(args.Context) == groupsTree)
{
TreeIter selectedRow;
if (groupsTree.Selection.GetSelected(out selectedRow))
{
if (groupsTree.Model.GetValue(selectedRow, 2) == deletedGroup)
{
args.RetVal = false;
return;
}
TreePath draggedPath = groupsTree.Model.GetPath(selectedRow);
if (!draggedPath.Equals(path) && !draggedPath.IsAncestor(path))
{
TreeIter destRow;
groupsTree.Model.GetIter(out destRow, path);
if (groupsTree.Model.GetValue(destRow, 2) == deletedGroup)
{
args.RetVal = false;
return;
}
groupsTree.SetDragDestRow(path, pos);
}
}
}
else
{
switch (pos)
{
case TreeViewDropPosition.Before:
groupsTree.SetDragDestRow(path, TreeViewDropPosition.IntoOrBefore);
break;
case TreeViewDropPosition.After:
groupsTree.SetDragDestRow(path, TreeViewDropPosition.IntoOrAfter);
break;
}
}
Gdk.Drag.Status(args.Context, args.Context.SuggestedAction, args.Time);
args.RetVal = true;
}
private void GroupsTree_DragDrop(object o, DragDropArgs args)
{
if (Drag.GetSourceWidget(args.Context) != groupsTree)
{
return;
}
TreePath path;
TreeViewDropPosition pos;
groupsTree.GetDestRowAtPos(args.X, args.Y, out path, out pos);
TreeIter row;
groupsTree.Model.GetIter(out row, path);
T group = (T)groupsTree.Model.GetValue(row, 2);
int insertionIndex = GetInsertionIndex(pos, ref group);
TreeIter selectedRow;
if (!groupsTree.Selection.GetSelected(out selectedRow))
{
args.RetVal = true;
Drag.Finish(args.Context, false, false, args.Time);
return;
}
TreePath draggedPath = groupsTree.Model.GetPath(selectedRow);
if (draggedPath.Equals(path) || draggedPath.IsAncestor(path))
{
args.RetVal = true;
Drag.Finish(args.Context, false, false, args.Time);
return;
}
T draggedGroup = RemoveFromOldPosition(group, selectedRow, ref insertionIndex);
MoveGroup(draggedGroup, insertionIndex, group);
args.RetVal = true;
Drag.Finish(args.Context, true, true, args.Time);
TreePath movedPath = LoadGroups(false, draggedGroup);
groupsTree.ExpandToPath(movedPath);
}
public static Widget GetSourceWidget(this DragContext context)
{
return(Drag.GetSourceWidget(context));
}
