internal bool DoDragDrop(Gdk.DragContext context, int x, int y, uint time)
{
DragDropInfo.LastDragPosition = new Point(x, y);
var cda = ConvertDragAction(context.GetSelectedAction());
DragDropResult res;
if ((enabledEvents & WidgetEvent.DragDropCheck) == 0)
{
if ((enabledEvents & WidgetEvent.DragDrop) != 0)
{
res = DragDropResult.None;
}
else
{
res = DragDropResult.Canceled;
}
}
else
{
DragCheckEventArgs da = new DragCheckEventArgs(new Point(x, y), Util.GetDragTypes(context.ListTargets()), cda);
ApplicationContext.InvokeUserCode(delegate {
EventSink.OnDragDropCheck(da);
});
res = da.Result;
if ((enabledEvents & WidgetEvent.DragDrop) == 0 && res == DragDropResult.None)
{
res = DragDropResult.Canceled;
}
}
if (res == DragDropResult.Canceled)
{
Gtk.Drag.Finish(context, false, false, time);
return(true);
}
else if (res == DragDropResult.Success)
{
Gtk.Drag.Finish(context, true, cda == DragDropAction.Move, time);
return(true);
}
else
{
// Undefined, we need more data
QueryDragData(context, time, false);
return(true);
}
}
internal bool DoDragDataReceived(Gdk.DragContext context, int x, int y, Gtk.SelectionData selectionData, uint info, uint time)
{
if (DragDropInfo.DragDataRequests == 0)
{
// Got the data without requesting it. Create the datastore here
DragDropInfo.DragData = new TransferDataStore();
DragDropInfo.LastDragPosition = new Point(x, y);
DragDropInfo.DragDataRequests = 1;
}
DragDropInfo.DragDataRequests--;
// If multiple drag/drop data types are supported, we need to iterate through them all and
// append the data. If one of the supported data types is not found, there's no need to
// bail out. We must raise the event
Util.GetSelectionData(ApplicationContext, selectionData, DragDropInfo.DragData);
if (DragDropInfo.DragDataRequests == 0)
{
if (DragDropInfo.DragDataForMotion)
{
// If no specific action is set, it means that no key has been pressed.
// In that case, use Move or Copy or Link as default (when allowed, in this order).
var cact = ConvertDragAction(context.Actions);
if (cact != DragDropAction.Copy && cact != DragDropAction.Move && cact != DragDropAction.Link)
{
if (cact.HasFlag(DragDropAction.Move))
{
cact = DragDropAction.Move;
}
else if (cact.HasFlag(DragDropAction.Copy))
{
cact = DragDropAction.Copy;
}
else if (cact.HasFlag(DragDropAction.Link))
{
cact = DragDropAction.Link;
}
else
{
cact = DragDropAction.None;
}
}
DragOverEventArgs da = new DragOverEventArgs(DragDropInfo.LastDragPosition, DragDropInfo.DragData, cact);
ApplicationContext.InvokeUserCode(delegate {
EventSink.OnDragOver(da);
});
OnSetDragStatus(context, (int)DragDropInfo.LastDragPosition.X, (int)DragDropInfo.LastDragPosition.Y, time, ConvertDragAction(da.AllowedAction));
return(true);
}
else
{
// Use Context.Action here since that's the action selected in DragOver
var cda = ConvertDragAction(context.GetSelectedAction());
DragEventArgs da = new DragEventArgs(DragDropInfo.LastDragPosition, DragDropInfo.DragData, cda);
ApplicationContext.InvokeUserCode(delegate {
EventSink.OnDragDrop(da);
});
Gtk.Drag.Finish(context, da.Success, cda == DragDropAction.Move, time);
return(true);
}
}
else
{
return(false);
}
}