Class

ChartTrackballController

Initializes a new instance of the ChartTrackballController class.

Declaration

public ChartTrackballController()

Gets or sets a value indicating whether points should be drawn on the trackball line.

Declaration

public bool DrawPoints { get; set; }

Property Value

Gets the info element of the controller.

Declaration

public TrackballInfoElement Element { get; }

Property Value

Gets or sets the size to be used when IsFixedSize is set to true.

Declaration

public virtual Size FixedSize { get; set; }

Property Value

Gets or sets the offset of the info element.

Declaration

public virtual Size InfoElementOffset { get; set; }

Property Value

Gets or sets the size of the inner circle of the trackball points.

Declaration

public virtual SizeF InnerPointSize { get; set; }

Property Value

Gets or sets a value indicating whether trackball will move while the mouse hovers the info element.

Declaration

public virtual bool InteractiveTrackball { get; set; }

Property Value

Gets or sets a value indicating whether this trackball info element is with fixed size. You have to set the FixedSize property to specify the size.

Declaration

public virtual bool IsFixedSize { get; set; }

Property Value

Gets or sets the color of the line.

Declaration

public virtual Color LineColor { get; set; }

Property Value

Gets or sets the width of the trackball line.

Declaration

public virtual float LineWidth { get; set; }

Property Value

Gets or sets the size of the outer circle of the trackball points.

Declaration

public virtual SizeF OuterPointsSize { get; set; }

Property Value

Gets or sets a format string which will be used to format the text for each data point in the info element. The default value is "{0}:{1}".

Declaration

public string PointFormatString { get; set; }

Property Value

Gets or sets the trackball points fill.

Declaration

public virtual Color PointsFill { get; set; }

Property Value

Creates lists of datapoints grouped by their X, Y or angle coordinate depending on the type of the chart.

Declaration

protected virtual SortedDictionary<double, List<DataPointInfo>> BuildPointsDictionary()

Returns

This method is called when the controller is added to the controllers collection of a chart view.

Declaration

protected override void ControllerAdded(ChartView view)

Parameters

Overrides ChartViewController.ControllerAdded(ChartView)

This method is called when the controller is removed from the controllers collection of a chart view.

Declaration

protected override void ControllerRemoved()

Overrides ChartViewController.ControllerRemoved()

Creates the element that is displaying the trackball information.

Declaration

protected virtual TrackballInfoElement CreateInfoElement()

Returns

Gets the location where the info element should be positioned.

Declaration

protected virtual PointF GetCartesianTrackballElementLocation(PointF location)

Parameters

Returns

Gets the points along horizontal, vertical or radius line closest to the given location depending on the type of the chart.

Declaration

protected virtual List<DataPointInfo> GetClosestPoints(PointF location)

Parameters

Returns

Gets the back color of a given data point from its element.

Declaration

protected virtual Color GetColorForDataPoint(ChartSeries series, DataPoint point)

Parameters

Returns

Gets the text for a specific data point.

Declaration

protected virtual string GetPointText(DataPoint point)

Parameters

Returns

Gets the location where the info element should be positioned.

Declaration

protected virtual PointF GetRadialTrackballElementLocation(PointF location)

Parameters

Returns

Gets the trackball element location.

Declaration

protected virtual PointF GetTrackballElementLocation(PointF location)

Parameters

Returns

Gets the text to be displayed in the trackball info element.

Declaration

protected virtual string GetTrackballText(List<DataPointInfo> points)

Parameters

Returns

Initializes the Trackball controller with the default settings.

Declaration

protected virtual void InitializeFields()

Changes the location of the trackball according to the location.

Declaration

protected virtual void MoveTrackball(PointF location)

Parameters

Raises the event.

Declaration

protected override ActionResult OnDraw(EventArgs e)

Parameters

Returns

Overrides ChartViewController.OnDraw(EventArgs)

Raises the event.

Declaration

protected virtual void OnLocationChanged(LocationChangedEventArgs e)

Parameters

Raises the event.

Declaration

protected override ActionResult OnMouseEnter(EventArgs e)

Parameters

Returns

Overrides ChartViewController.OnMouseEnter(EventArgs)

Raises the event.

Declaration

protected override ActionResult OnMouseLeave(EventArgs e)

Parameters

Returns

Overrides ChartViewController.OnMouseLeave(EventArgs)

Raises the event.

Declaration

protected override ActionResult OnMouseMove(MouseEventArgs e)

Parameters

Returns

Overrides ChartViewController.OnMouseMove(MouseEventArgs)

Raises the event.

Declaration

protected virtual void OnPenInitialized(PenInitializedEventArgs e)

Parameters

Raises the event.

Declaration

protected virtual void OnTextNeeded(TextNeededEventArgs e)

Parameters

Occurs when the location of the trackball is changed.

Declaration

public event LocationChangedEventHandler LocationChanged

Event Value

Occurs after initializing the pen object used to draw the line of the track ball. The event allows additional settings, like dash-style, caps, etc. to be appplied on the pen.

Declaration

public event PenInitializedEventHandler PenInitialized

Event Value

Occurs when the text of the trackball info element is changed.

Declaration

public event TextNeededEventHandler TextNeeded

Event Value