Hai

I tried and could not get success for showing values in tooltip on axis. I am using asp.net web application. Can you just tell steps to do? I could not get result by your win application code forums. Remember I just want to show $0, $2000000 etc in tooltip. Please refer the attachment.

Sridhar

today i looked at this more closely and remembered that it's a bit more complicated on the web; you have to add a transparent Box primitive to show the tooltip, implement IRenderLabel, and manipulate a few other things to get it working.  but here you go...

protected void Page_Load(object sender, EventArgs e)
    {
        this.UltraChart1.Data.DataSource = Infragistics.UltraChart.Data.DemoTable.Table();
        this.UltraChart1.Data.DataBind();
        this.UltraChart1.FillSceneGraph += new Infragistics.UltraChart.Shared.Events.FillSceneGraphEventHandler(UltraChart1_FillSceneGraph);

        Hashtable labelRenderers = new Hashtable();
        labelRenderers.Add("MY_LABEL", new MyLabelRenderer());
        this.UltraChart1.LabelHash = labelRenderers;
        this.UltraChart1.Tooltips.FormatString = "<MY_LABEL>";
    }
    internal class MyLabelRenderer : IRenderLabel
    {
        public string ToString(Hashtable context)
        {
            int row = Convert.ToInt32(context["DATA_ROW"]);
            if (row > 999)
            {
                return context["MY_VALUE"].ToString();
            }
            else
            {
                return context["DATA_VALUE"].ToString();
            }
        }

    }

    void UltraChart1_FillSceneGraph(object sender, FillSceneGraphEventArgs e)
    {
        Axis yAxis = e.Grid["Y"] as Axis;
        if (yAxis == null)
        {
            return;
        }
        PrimitiveCollection primitivesToAdd = new PrimitiveCollection();
        int pointCounter = 0;
        foreach (Primitive p in e.SceneGraph)
        {
            Text t = p as Text;
            if (t != null && t.bounds.Right < yAxis.startPoint.X)
            {
                Box boxToAdd = new Box(t.bounds);
                boxToAdd.PE.FillOpacity = boxToAdd.PE.StrokeOpacity = 0;
                boxToAdd.Caps = PCaps.Tooltip | PCaps.HitTest;
                boxToAdd.Layer = e.ChartCore.GetChartLayer();
                boxToAdd.Chart = e.ChartCore.ChartType;
                boxToAdd.Row = boxToAdd.Column = 1000 + pointCounter++;
                boxToAdd.Value = double.Parse(t.GetTextString());
                boxToAdd.Tags = new Hashtable();
                boxToAdd.Tags.Add("MY_VALUE", boxToAdd.Value);
               
                primitivesToAdd.Add(boxToAdd);
            }
        }
        e.SceneGraph.AddRange(primitivesToAdd.ToArray());
    }

Hai

Thanks It works fine for Y axis, i need that logic for X axis also and the columns should have

FormatString

="&lt;ITEM_LABEL&gt; (&lt;DATA_VALUE:&gt;)"

Because I have to show combined tooltips for column values.

Sridhar said:

Thanks It works fine for Y axis, i need that logic for X axis

in the FillSceneGraph method, add

Axis xAxis = e.Grid["X"] as Axis;

and change the condition

if (t != null && t.bounds.Right < yAxis.startPoint.X)

to

if (t != null && (t.bounds.Right < yAxis.startPoint.X || t.bounds.Top > xAxis.startPoint.Y))

Sridhar said:

also and the columns should have

FormatString

 

="&lt;ITEM_LABEL&gt; (&lt;DATA_VALUE:&gt;)"

change

               return context["DATA_VALUE"].ToString();

to

return context["ITEM_LABEL"].ToString() + " (" + context["DATA_VALUE"].ToString() +")";

 Hai

I tried this as given below. I could not get tooltip over X axis since it is a name(String) I think it wil l work for integers. Can you guide me. I attached the column chart screenshot. 

protected void Chart_FillSceneGraph(object sender, FillSceneGraphEventArgs

e)

{

Axis yAxis = e.Grid["Y"] as Axis

;

Axis xAxis = e.Grid["X"] as Axis

;

if (yAxis == null

)

{

return

;

}

PrimitiveCollection primitivesToAdd = new PrimitiveCollection

();

int

pointCounter = 0;

foreach (Primitive p in

e.SceneGraph)

{

Line l = p as Line

;

if (l != null

&& l.p1.Y == l.p2.Y)

{

// this should be the x axis line

l.p1.X = yAxis.startPoint.X;

l.p2.X = e.ChartCore.GetChartLayer().GetOuterBounds().Right;

}

;

if (t != null

&& (t.bounds.Right < yAxis.startPoint.X || t.bounds.Top > xAxis.startPoint.Y))

{

Box boxToAdd = new Box

(t.bounds);

boxToAdd.PE.FillOpacity = boxToAdd.PE.StrokeOpacity = 0;

PCaps.Tooltip | PCaps

.HitTest;

boxToAdd.Layer = e.ChartCore.GetChartLayer();

boxToAdd.Chart = e.ChartCore.ChartType;

boxToAdd.Row = boxToAdd.Column = 1000 + pointCounter++;

double

k;

if (double.TryParse(t.GetTextString(), out k) == true

)

{

double

.Parse(t.GetTextString());

boxToAdd.Tags =

new Hashtable

();

boxToAdd.Tags.Add(

"MY_VALUE"

, boxToAdd.Value);

}

internal class MyLabelRenderer : IRenderLabel

{

context)

{

]);

(row > 999)

{

].ToString();

}

else

//return context["DATA_VALUE"].ToString();

;

try this:

    protected void Chart_FillSceneGraph(object sender, FillSceneGraphEventArgs e)
    {
        Axis yAxis = e.Grid["Y"] as Axis;
        Axis xAxis = e.Grid["X"] as Axis;
        if (yAxis == null)
        {
            return;
        }
        PrimitiveCollection primitivesToAdd = new PrimitiveCollection();
        int pointCounter = 0;
        foreach (Primitive p in e.SceneGraph)
        {
            Line l = p as Line;
            if (l != null && l.p1.Y == l.p2.Y)
            {
                // this should be the x axis line
                l.p1.X = yAxis.startPoint.X;
                l.p2.X = e.ChartCore.GetChartLayer().GetOuterBounds().Right;
            }
            Text t = p as Text;
            if (t != null && (t.bounds.Right < yAxis.startPoint.X || t.bounds.Top > xAxis.startPoint.Y || (t.Path != null && (t.Path == "Border.Title.Grid.X" || t.Path == "Border.Title.Grid.Y"))))
            {
                Box boxToAdd = new Box(t.bounds);
                boxToAdd.PE.FillOpacity = boxToAdd.PE.StrokeOpacity = 0;
                boxToAdd.Caps = PCaps.Tooltip | PCaps.HitTest;
                boxToAdd.Layer = e.ChartCore.GetChartLayer();
                boxToAdd.Chart = e.ChartCore.ChartType;
                boxToAdd.Row = boxToAdd.Column = 1000 + pointCounter++;
                double k;
                if (double.TryParse(t.GetTextString(), out k) == true)
                {
                    boxToAdd.Value = double.Parse(t.GetTextString());
                }
                else
                {
                    boxToAdd.Value = t.GetTextString();
                }
                boxToAdd.Tags = new Hashtable();
                boxToAdd.Tags.Add("MY_VALUE", boxToAdd.Value);
                primitivesToAdd.Add(boxToAdd);
            }
        }
        e.SceneGraph.AddRange(primitivesToAdd.ToArray());
    }

it worked fine for me. attached sample

Hi

I used the same code in line chart but it dint work. I tried to fix it but failed. Can you tell me how can I do this for linechart? What are the changes need to be done?

Thanks.

Thanks. It works fine.

Sridhar