[lazarus] GTK team: please specify!

Mattias Gaertner nc-gaertnma at netcologne.de
Sun Nov 2 05:36:00 EST 2003

On Sat, 01 Nov 2003 21:39:49 +0100
Micha Nelissen <M.Nelissen at student.tue.nl> wrote:

> Mattias Gaertner wrote:
> > Much more clearer :)
> > I was a little bit confused by the term "derivative of TCustomForm".
> Well, I meant descendant I think, ie. a windowed control.
> > Ok, grabbers and icons can be replaced by special non LCL widgets (in
> > win32 slang: windows).
> > What about the rubberband, the selection marks and the guide/snap lines?
> Rubberband can be drawn on the screen itself. It's temporary, after all. 
> Is this possible in gtk too?

Yes. But I'm not sure, how to combine this with the LCL/IDE.

> Selection marks aren't the grabber handles?

No, I mean the multiselection marks (normally gray 4 rectangles at each
corner of each component). When the user selects 10 components, should we
then create 40 small widgets?

> Guide/snap lines are the grid, the dots? 

No, this is the grid. I mean the green and blue lines showing the alignment
of the selection with other controls on the form. Maybe you never saw them,
because Delphi does not have them and the designer does not yet work under

> These are not inter-control, 
> are they? Only things that require inter-control calculations should be 
> redone. Or is this too simply thought?
> We can try to implement things one by one, first the invisible 
> components, then the grabber handles, etc...Then dependencies will show 
> gradually. Or do you want a complete rewrite from scratch?

No, every item (grabbers, marks, snap lines, grid, icons) is already
splitted up. So, we can replace them one by one.
What we need are LCL widgets, that are not controls. Maybe we can call them
TDesignerWidget. (Not TDesignerControl, because they have nothing to do with
TControl, not even with TComponent). They should be as separate from the
normal LCL routines as possible. For example: No messages.


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