Forums Ultimate UI for ASP.NET Web Forms
Your Privacy Matters: We use our own and third-party cookies to improve your experience on our website. By continuing to use the website we understand that you accept their use. Cookie Policy
Close
Robert
349
Custom Background on UltraChart
posted

Hi Guys,

 

Does anyone have a clue how to add a few colour ranges to a background of a ultrawebchart, so this colour is applied to a layer below the bars on the chart? i want to add the following to my chart:-

My data ranges from 0 to 100%

Range 1 -  (0 to 40%) coloured Red

Range 2 - (40 to 70%) coloured Orange

Range 3 - (70 to 100%) coloured Green.

 

The closed thing i managed to achieve is to add a box element to the chart but this is draw on a layer above the bar, and altering the colours of the bars depending on there value. Does anyone know if this is even possible?

Parents
No Data
Reply
  • 28496
    Verified Answer
    Offline posted

             private void ultraChart1_FillSceneGraph(object sender, FillSceneGraphEventArgs e)
            {
                
                IAdvanceAxis xAxis = e.Grid["X"] as IAdvanceAxis;
                IAdvanceAxis yAxis = e.Grid["Y"] as IAdvanceAxis;
                if (xAxis == null || yAxis == null)
                {
                    return;
                }
                int indexOfBorderBox = -1;
                for (int current = 0; current < e.SceneGraph.Count; current++)
                {
                    if (e.SceneGraph[current].Path == "Border")
                    {
                        indexOfBorderBox = current;
                        break;
                    }
                }
                int yMapRange = (int)Math.Abs(yAxis.MapRange);
                int redBoxTop = (int)(yAxis.MapMinimum - yMapRange * .4);
                int orangeBoxTop = (int)(yAxis.MapMinimum - yMapRange * .7);
                int greenBoxTop = (int)yAxis.MapMaximum;

                int redBoxHeight = (int)(yAxis.MapMinimum - redBoxTop);
                int orangeBoxHeight = redBoxTop - orangeBoxTop;
                int greenBoxHeight = (int)(orangeBoxTop - yAxis.MapMaximum);

                int xMin = (int)xAxis.MapMinimum;
                int xMax = (int)xAxis.MapMaximum;
                int xWidth = xMax - xMin;

                Box redBox = new Box(new Rectangle(xMin, redBoxTop, xWidth, redBoxHeight));
                Box orangeBox = new Box(new Rectangle(xMin, orangeBoxTop, xWidth, orangeBoxHeight));
                Box greenBox = new Box(new Rectangle(xMin, greenBoxTop, xWidth, greenBoxHeight));

                redBox.PE = new PaintElement(Color.Red);
                orangeBox.PE = new PaintElement(Color.Orange);
                greenBox.PE = new PaintElement(Color.Green);

                e.SceneGraph.Insert(indexOfBorderBox + 1, greenBox);
                e.SceneGraph.Insert(indexOfBorderBox + 1, orangeBox);
                e.SceneGraph.Insert(indexOfBorderBox + 1, redBox);
                
            }

Children