Legend and Line colors getting repeated in Line Chart

135

Raghavendra NLV posted over 14 years ago

Hello

I've a UltraLineChart to whcih i bind a datatable. I get 8-16 series in my chart. But the legend and line colors get repeated for every five lines. How can i give different colors for different series?

Thank you

Regards

NLV

28496

Offline David Negley posted over 14 years ago in reply to Raghavendra NLV

nlvraghavendra said:
1. It hides the scroll bar too.

that is because of this code:

                    if (e.Primitive.Path.IndexOf("Legend") == -1)
                    {
                        e.Primitive.Visible = false;
                    }

one way to fix that is:

                    if (e.Primitive.Path.IndexOf("Legend") == -1)
                    {

                        e.Primitive.Visible = e.Primitive.Path.IndexOf("ScrollBar") != -1;
                    }

nlvraghavendra said:
2. When i move my mouse out of the chart, the chart reverts itself back showing all the lines. Why is ChartDrawItem event raised when i move my mouse out of the control? I really dont understand.

the chart needs to invalidate the view on mouseout in order to clear any highlighting and tooltips being displayed.

i think you will get the desired behavior by moving your Click code to a MouseDown event handler, and call InvalidateLayers() as well:

        private void ultraChart1_Click(object sender, EventArgs e)
        {

        }

        private void ultraChart1_MouseDown(object sender, MouseEventArgs e)
        {
            emptyChartClicked = true;
            this.currentRow = -1;
            this.ultraChart1.InvalidateLayers();
        }
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135

Raghavendra NLV posted over 14 years ago

Okie, i did it through ChartDrawItem event.

I've other several issues with the chart

My requirement:

1.Click a legend -> Hide all the other lines and show the selected line

2. Click outside the legend any where in the empty area of the chart area or legend area -> Show all the lines again.

Problems

I've completed item 1. But the problem is

1. It hides the scroll bar too.

2. When i move my mouse out of the chart, the chart reverts itself back showing all the lines. Why is ChartDrawItem event raised when i move my mouse out of the control? I really dont understand.

Code:

ChartDrawItem

private void ifgContractLineChart_ChartDrawItem(object sender, Infragistics.UltraChart.Shared.Events.ChartDrawItemEventArgs e)
        {

            if (e.HasData)
            {
                if (e.Primitive is Polyline)
                {
                    if (lineChartSeriesCount >= originalLineChartSeriesCount)
                        lineChartSeriesCount = 0;
                    PaintElement pe = new PaintElement();
                    Color clr = HexToColor(lineColors[lineChartSeriesCount++]);
                    pe.Fill = clr;
                    pe.FillStopColor = clr;
                    e.Primitive.PE = pe;
                }
                if (e.Primitive.Path.IndexOf("Legend") != -1)
                {
                    if (lineChartSeriesCount >= originalLineChartSeriesCount)
                        lineChartSeriesCount = 0;
                    PaintElement pe = new PaintElement();
                    Color clr = HexToColor(lineColors[lineChartSeriesCount++]);
                    pe.Fill = clr;
                    pe.FillStopColor = clr;
                    e.Primitive.PE = pe;
                }

                if (e.Primitive is Infragistics.UltraChart.Core.Primitives.ScrollBar)
                {
                }

                if (e.Primitive.Path != null && e.Primitive.Path.IndexOf("Legend") != -1)
                {
                    e.Primitive.Caps |= PCaps.HitTest;

                }
                if (this.currentRow != -1 && e.Primitive.Row == currentRow)
                {
                    e.Primitive.PE = new PaintElement(Color.Red);
                }
                else if (!emptyChartClicked)
                {
                    if (e.Primitive.Path.IndexOf("Legend") == -1)
                    {
                        e.Primitive.Visible = false;
                    }
                    else
                    {
                        e.Primitive.PE = new PaintElement(Color.White);
                    }
                }
                //ifgContractLineChart.Axis.X.ScrollScale.Visible = true;
            }


        }

ChartDataClicked

private void ifgContractLineChart_ChartDataClicked(object sender, Infragistics.UltraChart.Shared.Events.ChartDataEventArgs e)
        {
            this.currentRow = e.Primitive.Row;
            this.ifgContractLineChart.InvalidateLayers();
            emptyChartClicked = false;
        }

Chart Clicked

        private void ifgContractLineChart_Click(object sender, EventArgs e)
        {
            emptyChartClicked = true;
            this.currentRow = -1;
        }

Thank you.
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