Nevron .NET Vision
Chart for .NET / User's Guide / Interactivity / Data Cursor

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    Data Cursor
    In This Topic

    The data cursor feature of the control allows you to synchronize the values of axis cursors (represented by the NAxisCursor object) with the mouse coordinates transformed to axis coordinates.

    You enable the data cursor feature by adding an object of type NDataCursorTool to the Tools collection of the control:

    Copy Code
    // add horizontal axis cursor
    NAxisCursor horzAxisCursor = new NAxisCursor();
    horzAxisCursor.BeginEndAxis = (int)StandardAxis.PrimaryY;
    horzAxisCursor.SynchronizeOnMouseAction = MouseAction.Down;
    // add vertical axis cursor
    NAxisCursor vertAxisCursor = new NAxisCursor();
    vertAxisCursor.BeginEndAxis = (int)StandardAxis.PrimaryX;
    vertAxisCursor.SynchronizeOnMouseAction = MouseAction.Down;
    // add selector and data cursor tool
    chartControl.Controller.Tools.Add(new NSelectorTool());
    chartControl.Controller.Tools.Add(new NDataCursorTool());
    Visual Basic
    Copy Code
    ' add horizontal axis cursor
    Dim horzAxisCursor As New NAxisCursor
    horzAxisCursor.BeginEndAxis = CType(StandardAxis.PrimaryY, Integer)
    horzAxisCursor.SynchronizeOnMouseAction = MouseAction.Down
    ' add vertical axis cursor
    Dim vertAxisCursor As New NAxisCursor
    vertAxisCursor.BeginEndAxis = CType(StandardAxis.PrimaryX, Integer)
    vertAxisCursor.SynchronizeOnMouseAction = MouseAction.Down
    ' add selector and data cursor tool
    chartControl.Controller.Tools.Add(New NSelectorTool)
    chartControl.Controller.Tools.Add(New NDataCursorTool)

    Now when the user presses the left mouse button over the chart the axis cursors will be positioned at the this location.

    See Also