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Author Topic: OnKeyDown absent in TScrollBox  (Read 4561 times)

Shebuka

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OnKeyDown absent in TScrollBox
« on: March 02, 2012, 03:01:19 pm »
Subject is talking by himself :) Why there is no OnKeyDown in TScrollBox?

Laz SVN and FPC 2.6
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Blaazen

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Re: OnKeyDown absent in TScrollBox
« Reply #1 on: March 02, 2012, 03:17:54 pm »
There is OnKeyDown, but it is not published. TScrollBox is derived from TCustomControl.
Maybe you can try assign something (in code).
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Shebuka

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Re: OnKeyDown absent in TScrollBox
« Reply #2 on: March 02, 2012, 04:01:16 pm »
Quote from: Blaazen on March 02, 2012, 03:17:54 pm
There is OnKeyDown, but it is not published. TScrollBox is derived from TCustomControl.
Maybe you can try assign something (in code).

This trick works, but i don't understand why if it's not assigned it doesn't pass the keydown event to it's parent (in my case Form, wich has keydown assigned), i know that for example timage pass keydown event automatically to it's parent.
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Blaazen

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Re: OnKeyDown absent in TScrollBox
« Reply #3 on: March 02, 2012, 04:09:25 pm »
TImage is derived from TGraphicControl (a "lightweight" component).

Did you assign property Form.Keypreview to True ?
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Shebuka

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Re: OnKeyDown absent in TScrollBox
« Reply #4 on: March 02, 2012, 07:01:29 pm »
Quote from: Blaazen on March 02, 2012, 04:09:25 pm
TImage is derived from TGraphicControl (a "lightweight" component).

Did you assign property Form.Keypreview to True ?
No, it's false in the form with image and it's also false in the form with scrollbox
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