Hi,

I have own control TMyPanel which inherit from TCustomControl instead of TCustomPanel (because I don't want add ExtCtrls unit). My panel has the same flags and options like TCustomPanel, but Autosize doesn't work like in normal panel. My panel don't account child controls and I can't find code responsible for that in TCustomPanel. Any tips?

BTW: Why TCustomPanel is in ExtCtrls unit? I think that this important control which is the base for many other controls, should be in StdCtrls (it is on standard palette). Reason is delphi compability?

Regards
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If you are writing a custom control, then you need to write yourself code to calculate it's prefered size on autosize. I think that to do that you need to override the routine PreferredSize or something similar. And there implement the calculation like you want.

BTW: Why TCustomPanel is in ExtCtrls unit? I think that this important control which is the base for many other controls, should be in StdCtrls (it is on standard palette). Reason is delphi compability?

This makes no sense. A control is not more important because he is in unit x or y. Moving controls from one unit to the other is not a good idea as it changes nothing and causes backwards compatibility issues.

If you are writing a custom control, then you need to write yourself code to calculate it's prefered size on autosize. I think that to do that you need to override the routine PreferredSize or something similar. And there implement the calculation like you want.

I thought so. I just overrided CalculatePreferredSize method and enumerated child controls for height calculation. Works fine. Thanks -------------- next part --------------
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