// modifications might be compositted, e.g. dragging a box would
// probably modify the arrows attached to it
internal void onModifyItem(ChartObject item)
{
if (!undoEnabled)
{
return;
}
// during layout operations all items already have a ModifyItemCmd created
if (currLayoutCmd != null)
{
return;
}
// might be called for group children while in BoundginRect.set
if (currProgrModifyCmd != null)
{
currProgrModifyCmd.AddSubCmd(new ModifyItemCmd(item));
}
else
// or when users start moving an item around
if (currModifyCmd == null)
{
currModifyCmd = new ModifyItemCmd(item);
}
else
// or when dependent items positions are updated while
// moving another item around
{
currModifyCmd.AddSubCmd(new ModifyItemCmd(item));
}
}
// programmatic position changes
internal void onStartPlacementChange(ChartObject item)
{
if (!undoEnabled)
{
return;
}
currProgrModifyCmd = new ModifyItemCmd(item);
}
