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Simon Hooper
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 Posted: Tue Nov 04, 2003 9:02 am Post subject: Finding components at design time |
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I have written a new component. When I put one on a form in the IDE I want
to search the project for any instances of another component class and
thereafter take some action. How can I find all instances of a component
class at design time?
The object inspector for TDatasource lists all TDatasets from all
forms in the uses clause, whether those units are opened for editing or not,
so I figure
that it must be possible.
Thanks in advance
Simon
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Marc Rohloff
Guest
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| Posted: Tue Nov 04, 2003 12:55 pm Post subject: Re: Finding components at design time |
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On Tue, 4 Nov 2003 09:02:24 -0000, Simon Hooper<simon (AT) simonhooper (DOT) co.uk>
said ...
| Quote: | I have written a new component. When I put one on a form in the IDE I want
to search the project for any instances of another component class and
thereafter take some action. How can I find all instances of a component
class at design time?
The object inspector for TDatasource lists all TDatasets from all
forms in the uses clause, whether those units are opened for editing or not,
so I figure
that it must be possible.
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Any property which references a TComponent descendant generates this list
automatically in the drop-down. If you look at
TComponentProperty.GetValues (in DesignEditors) you can see that this
basically comes down to:
Designer.GetComponentNames(TypeData, CallbackProc);
You should just be able to use the built in functionality. Is there any
reason this is not sufficient?
Marc
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Simon Hooper
Guest
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| Posted: Tue Nov 04, 2003 5:25 pm Post subject: Re: Finding components at design time |
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Thanks Marc,
Designer.GetComponentNames and other methods of IDesigner look really
useful.
Can I get hold of the designer interface in the constructor, rather than a
component editor?
Something like:
constructor TMyComponent.Create(AOwner: TComponent);
begin
inherited;
if (csDesigning in ComponentState) then
Designer..........................
end;
Simon
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