[Gambas-user] Re: Drawing Area Issues

[Christopher Brian Jack]

PS: Gambas Version 1.9.20 under Debian Sarge2

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Christopher BRIAN Jack aka "Gau of the Veldt"
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brian at ...1334...
brian at ...1335...
brian at ...1336...
brian at ...1337...
gau_veldt at ...67...
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-- Hi Spambots, my email address is sputnik at ...1334...

On Sun, 22 Jan 2006, Christopher Brian Jack wrote:

> Date: Sun, 22 Jan 2006 13:21:26 -0800 (PST)
> From: Christopher Brian Jack <brian at ...1334...>
> To: Gambas-Users List <gambas-user at lists.sourceforge.net>
> Subject: Drawing Area Issues
>
>
> I believe I have discoverd an off-by-one problem with the DrawingArea
> control.
>
> It's easy enough to reproduce:
>
> 1. Create a form with a DrawingArea control 640x480 pixels
> 2. In the form create a private picture variable
> 3. In the form startup
>    a) instantiate the picture variable with a 640x480 image
>    b) draw some thin lines
>
> Draw.Begin(thePicture)
>   Draw.LineWidth=1
>   Draw.ForeColor=&H000000&
>   Draw.FillColor=&H000000&
>   Draw.FillStyle=Fill.solid
>   Draw.Rect(0,0,640,480)
>   Draw.FillStyle=Fill.none
>   Draw.ForeColor=&Hffff00&
>   Draw.Rect(0,0,640,480)
> Draw.End
>
> 4. Draw the image in the DrawingArea it will not show the extreme right
> and lower edges.
>
> Draw.Begin(theDrawingArea)
>   ' Rectangle has no right or bottom edges
>   Draw.Picture(thePicture,0,0,0,0,640,480)
>   ' Rectangle will show right+bottom but left and top are gone
>   Draw.Picture(thePicture,0,0,1,1,640,480)
> Draw.End
>
> Workaround:
>
>   * Make the DrawingArea exactly 1 pixel wider and 1 pixel higher.
>
> ==================================================
> Christopher BRIAN Jack aka "Gau of the Veldt"
> ==================================================
> brian at ...1334...
> brian at ...1335...
> brian at ...1336...
> brian at ...1337...
> gau_veldt at ...67...
> ==================================================
>
> -- Hi Spambots, my email address is sputnik at ...1334...
>