delphi – Is it wise to create composite controls? – Stack Overflow
Posted by jpluimers on 2026/09/10
Reminder to self to one day create a conference session on Delphi and composite controls: [Wayback/Archive] delphi – Is it wise to create composite controls? – Stack Overflow.
Too few, even die-hard, Delph developers realise the meaning of these concepts:
- Forms
- Frames
- Panels
- Controls
- Component templates
- Controls that can and cannot have focus
- Parentship
- Ownership
Even fewer understand you can use frames as hosts to create composite controls; the only thing you need is the undocumented sprig feature on which I blogged before in Delphi – Frames as visual Components – don’t forget your Sprig!.
A good example would be a TLabeledEdit in both VCL and FMX which can be extended to any labeled component.
--jeroen
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