[Lazarus] Anchor-Docking Bugs

[Mattias Gaertner]

On Wed, 23 Jun 2010 11:06:46 +0200
Hans-Peter Diettrich <DrDiettrich1 at aol.com> wrote:

> Martin schrieb:
> 
> >>> 1. Just Click, without moving your mouse, on a Docking-Header, after
> >>> that the Desktop gets a 3px height and full length - big Rect (hard to
> >>> explain :( ) which is also shown if you want to dock a form to a
> >>> docking-side
> >>>      
> >> Are you sure you use the anchordocking manager and not the easydockmgr?
> >> The anchordocking has by default a drag threshold of 4 pixel. A simple
> >> click on the header does not start the docking.
> >>    
> > I can reproduce this here, with the anchor dock package. (didn't count 
> > the pixels, 3 or 4....)
> > 
> > Just a click, it happens on mouse up.
> 
> IMO this misbehaviour results from the inappropriate setting of 
> DragImmediate=True, inherited from Delphi.

Why does that only happen on windows?


> This default does no harm 
> with drag-drop (no harmful action triggered), but is inappropriate for 
> drag-dock, resulting in an immediate undock. The LCL could distinguish 
> between the start of a drag-drop or drag-dock operation, or simply could 
> set the default to False (delayed start). Unfortunately my according 
> suggestions were rejected by the LCL developers :-(
> 
> That's why the EasyDockMgr sets DragImmediate=False, on installation.


Mattias