"Reda" <piotr.nusbaum@domdata.com> wrote in message
news:du19hg$etq$1@helios.domdata.com...
> Hi,
> I used a LinearGradientBrush to fill a rectangle. This way I created
> 'legend' in my chart control.
> Now I need to get color for specified point (value). I thought that I
> could
> somehow get it using LinearGradientBrush, but it seems that I was wrong ;(
>
> Alternatively I would have to create my own 'GradientBrush' with a method
> like GetColorAtPoint(x,y). Am I right? Maybe there is another, easier
> solution to do this?
>
> Thanks in advance for any suggestions
> Peter
>
>
>

> If the linear gradient brush is truly linear you can calculate the colour
> using a variant of the Bresingham line-drawing algorithm.
>
> Unfortunately, Gradient brushes can be complex with additional features
such
> as curves or colour blends.
>
> As a blatant cheat I would suggest creating a bitmap, drawing a gradient
> onto it and then using GetPixel to retrieve the colour at the desired
point.
>
> --
> Bob Powell [MVP]
> Visual C#, System.Drawing
>
> Ramuseco Limited .NET consulting
> http://www.ramuseco.com
>
> Find great Windows Forms articles in Windows Forms Tips and Tricks
> http://www.bobpowell.net/tipstricks.htm
>
> Answer those GDI+ questions with the GDI+ FAQ
> http://www.bobpowell.net/faqmain.htm
>
> All new articles provide code in C# and VB.NET.
> Subscribe to the RSS feeds provided and never miss a new article.
>
>
>
> "Reda" <piotr.nusbaum@domdata.com> wrote in message
> news:du19hg$etq$1@helios.domdata.com...
> > Hi,
> > I used a LinearGradientBrush to fill a rectangle. This way I created
> > 'legend' in my chart control.
> > Now I need to get color for specified point (value). I thought that I
> > could
> > somehow get it using LinearGradientBrush, but it seems that I was wrong
;(
> >
> > Alternatively I would have to create my own 'GradientBrush' with a
method
> > like GetColorAtPoint(x,y). Am I right? Maybe there is another, easier
> > solution to do this?
> >
> > Thanks in advance for any suggestions
> > Peter
> >
> >
> >
>
>