Draw a line with linear gradient

[mcerk]

Hi. How can I draw a line with linear gradient. Lets say to start at color.Red and end with color.Blue


tx,

matej

 

[mutant]

Look into the System.Drawing.Drawing2D.LinearGradientbrush class. Here is an example:

Graphics gr = this.CreateGraphics();
LinearGradientBrush br = new LinearGradientBrush(new Rectangle(0,0,100,100), Color.NavajoWhite, Color.Red, LinearGradientMode.Vertical);
gr.FillRectangle(br, br.Rectangle);
gr.Dispose();

 

[mcerk]

Yes, I believed that drawing rectangle is maybe my only choice. But I have to draw a line. So I could draw very thin rectangle - Ill have some trouble with rotation, but I can firuge it out. brrrrrr....


Ill have to take a pen and paper into my hands and do some mathematics...

Look into the System.Drawing.Drawing2D.LinearGradientbrush class. Here is an example:

Graphics gr = this.CreateGraphics();
LinearGradientBrush br = new LinearGradientBrush(new Rectangle(0,0,100,100), Color.NavajoWhite, Color.Red, LinearGradientMode.Vertical);
gr.FillRectangle(br, br.Rectangle);
gr.Dispose();

 

[mutant]

Oh, im sorry, for some reason I didnt think about you needing a line when i wrote the code . You can create a Pen object used to draw the line from the brush so that is not a problem.

Graphics gr = this.CreateGraphics();

LinearGradientBrush br = new LinearGradientBrush(new Rectangle(0,0,100,100), Color.NavajoWhite, Color.Red, LinearGradientMode.Vertical);
Pen lpen = new Pen(br, 1);

gr.DrawLine(lpen,0,0,100,200);

gr.Dispose();