Hi gtk2 list

I realised today that the lcl doesn't react very well if you change the size of the system font. Autosized controls should react by invalidating and re-computing their size. I thought the best place to do this is GTKStyleChanged (using the style-set signal). It should be really simple, like calling InvalidatePreferredSize or something, but I can't get it to work (except if I call
gtk_widget_set_size_request(widget, -1, -1), but I doubt if that's the best thing to do). Can someone give me any hints, please?

Henry

AControl.InvalidateClientRectCache(false);

Then send a WMSize message to the control.

Mattias

2009/12/8 Mattias Gaertner :

Hmm, this works, but the resize seems to be one event behind. So the first resize does nothing, then the next one resizes to where the previous one should have been. I used ConnectSenderSignalAfter, but that didn't help.

Also, the labels don't obey the system font resize at all, any reason for that?

Henry

I don't know. Maybe you can create an example.

Also, the labels don't obey the system font resize at all, any reason for that?

Probably the font handles must be recreated.

Mattias

2009/12/8 Mattias Gaertner :

I don't know. Maybe you can create an example.

I've attached a simple diff.

OK, I may need some more pointers for that, but I'll dig first.

Henry
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2009/12/8 Henry Vermaak :

No luck with this, but I got it to work if I set a flag in the style-set and then check that flag in an event-after handler, invalidating and sending a size message as necessary. I just tested this with buttons, but it should be possible for a generic case. I'm just not sure what the best way is to integrate this into the lcl. Is this something you're interested in for the lcl?

Henry

2009/12/9 Henry Vermaak :

Any thoughts?

I added the event and some notes:

This event is called for many widgets but not for all. It is called on creation and called when the theme changes. The resizing should occur when all styles were updated by the gtk. The gtk itself uses size messages via queue.
Maybe the solution is to use g_idle_add for the top level form and resize.

Mattias