ColorLine with fill?

JayG · Post by **JayG** » Tue Apr 10, 2007 5:41 pm

Hi,

I would like my 3d chart to have a tool like the ColorLine, but with the resulting rectangle filled in and partially transparent. Is there a way to do that with a ColorLine, or will I need to draw a shape myself?

If I need to draw it myself, what method can I use to draw a rectangle oriented like a ColorLine tool based on the left axis, with all 4 corners having the same X value?

Jay

Narcís · Post by **Narcís** » Wed Apr 11, 2007 11:18 am

Hi Jay,

I'm afraid ColorLine doesn't support this. However you can achieve what you request custom drawing on TeeChart's canvas in its AfterDraw event and using something like this:

Code: Select all

		private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
		{
			int rectPos = tChart1.Axes.Left.CalcYPosValue(points1.MinYValue() + ((points1.MinYValue() + points1.MaxYValue()) / 2));

			g.Pen.Color = Color.Red;
			g.Brush.Color = Color.Red;
			g.Brush.Transparency = 50;
			g.RectangleY(tChart1.Axes.Bottom.IStartPos, rectPos, tChart1.Axes.Bottom.IEndPos, 0, tChart1.Axes.Depth.IEndPos);
		}

JayG · Post by **JayG** » Thu Apr 12, 2007 7:41 pm

Narcís,

Thanks for the suggestion. I need a vertical rectangle instead of a horizontal one, but I don't see a RectangleX method. None of the other Rectangle methods seem to do what I want. Is there another method I could use?

Jay

Narcís · Post by **Narcís** » Fri Apr 13, 2007 7:48 am

Hi Jay,

Yes, in that case you can use RectangleZ:

Code: Select all

		private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
		{
			int hRectPos = tChart1.Axes.Left.CalcYPosValue(points1.MinYValue() + ((points1.MinYValue() + points1.MaxYValue()) / 2));
			int vRectPos = tChart1.Axes.Bottom.CalcXPosValue(points1.MinXValue() + ((points1.MinXValue() + points1.MaxXValue()) / 2));

			g.Pen.Color = Color.Red;
			g.Brush.Color = Color.Red;
			g.Brush.Transparency = 50;
			g.RectangleY(tChart1.Axes.Bottom.IStartPos, hRectPos, tChart1.Axes.Bottom.IEndPos, 0, tChart1.Axes.Depth.IEndPos);
			g.RectangleZ(vRectPos, tChart1.Axes.Left.IStartPos, tChart1.Axes.Left.IEndPos, 0, tChart1.Axes.Depth.IEndPos);			
		}

JayG · Post by **JayG** » Fri Apr 13, 2007 3:10 pm

Thanks!

Now if there was a way get the chart series lines to pass "through" the rectangle instead of being drawn "in front of" it or "behind" it, that would be REALLY cool! Very hard to do though, I imagine...

Jay

Narcís · Post by **Narcís** » Mon Apr 16, 2007 2:59 pm

Hi Jay,

Yes, this is possible doing the custom drawing in the BeforeDrawSeries event. Something like this:

Code: Select all

		private void DrawRectangles(Steema.TeeChart.Drawing.Graphics3D g)
		{
			int hRectPos = tChart1.Axes.Left.CalcYPosValue(points1.MinYValue() + ((points1.MinYValue() + points1.MaxYValue()) / 2));
			int vRectPos = tChart1.Axes.Bottom.CalcXPosValue(points1.MinXValue() + ((points1.MinXValue() + points1.MaxXValue()) / 2));

			g.Pen.Color = Color.Red;
			g.Brush.Visible = true;
			g.Brush.Color = Color.Red;
			g.Brush.Transparency = 50;
			g.RectangleY(tChart1.Axes.Bottom.IStartPos, hRectPos, tChart1.Axes.Bottom.IEndPos, 0, tChart1.Axes.Depth.IEndPos);
			g.RectangleZ(vRectPos, tChart1.Axes.Left.IStartPos, tChart1.Axes.Left.IEndPos, 0, tChart1.Axes.Depth.IEndPos);

		}

		private void tChart1_BeforeDrawSeries(object sender, Steema.TeeChart.Drawing.Graphics3D g)
		{
			DrawRectangles(g);
		}