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Get Color RGB under Cursor from Control ? [message #465912]

Wed, 21 December 2005 21:12

lemi

Messages: 8
Registered: July 2009

Junior Member

Is there a way to get the pixel color (RGB) from a control, widget, or
canvas?
The only way i found was to grab pixel RGB from ImageData, but that does
not really help a lot.

thanks

lemi

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Re: Get Color RGB under Cursor from Control ? [message #465921 is a reply to message #465912]

Thu, 22 December 2005 14:31

Veronika Irvine

Messages: 1272
Registered: July 2009

Senior Member

There is no single method for getting a color at a pixel location from a
widget.

You could use GC.copyArea() to get an image of the screen at that location
and get the pixel value from the image.

See:
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet95.java?rev=HEAD&a mp;content-type=text/vnd.viewcvs-markup

"lemi" <chlache@talita.org> wrote in message
news:docghm$dov$1@utils.eclipse.org...
> Is there a way to get the pixel color (RGB) from a control, widget, or
> canvas?
> The only way i found was to grab pixel RGB from ImageData, but that does
> not really help a lot.
>
> thanks
>
> lemi

Report message to a moderator

Re: Get Color RGB under Cursor from Control ? [message #465927 is a reply to message #465921]

Thu, 22 December 2005 19:19

lemi

Messages: 8
Registered: July 2009

Junior Member

Thank you, i thought of this, but it seemed quite strange.

lemi

Veronika Irvine wrote:
> There is no single method for getting a color at a pixel location from a
> widget.
>
> You could use GC.copyArea() to get an image of the screen at that location
> and get the pixel value from the image.
>
> See:
> http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet95.java?rev=HEAD&a mp;content-type=text/vnd.viewcvs-markup
>
> "lemi" <chlache@talita.org> wrote in message
> news:docghm$dov$1@utils.eclipse.org...
>
>>Is there a way to get the pixel color (RGB) from a control, widget, or
>>canvas?
>>The only way i found was to grab pixel RGB from ImageData, but that does
>>not really help a lot.
>>
>>thanks
>>
>>lemi
>
>
>

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