[Lazarus] Exception in OnResize event handler

[Mattias Gaertner]

> Jürgen Hestermann via Lazarus <lazarus at lists.lazarus-ide.org> hat am 6. November 2016 um 12:27 geschrieben:
>[...]
> "Especially it is not sufficient to write only a TForm.OnResize handler
> to resize all controls on the form. This is a common bug in Delphi applications."
> 
> What does the last sentence mean?

For example a TButton in a TGroupBox in a TForm. When the theme changes, the GroupBox client area may change, and the form's client area not. Then form's OnResize is not triggered. You need to set the GroupBox.OnResize event.


> What else is needed to resize all controls on the form?

Depending on your layout you may need to set more Control OnResize events.

Mattias