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TRSChartGraphicArea Class

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Extends the RSChartPanel.TRSChartGraphic class to add graphical properties that are useful for chart panel graphics that paint on an area of the panel, such as Brush and Pen .

Namespace: RSChartPanel

TPersistent
RSChartPanel.TRSChartGraphic
RSChartPanel.TRSChartGraphicArea
RSBarCharts.TRSCandleStickGraphic
RSChartPanel.TRSChartAxis
RSChartPanel.TRSChartImageArea
RSChartPanel.TRSChartShadow
RSCharts.TRSCustomChartPointInfo

Delphi

type
TRSChartGraphicArea = class(TRSChartGraphic)
end;

	Name	Description
	Create	Initializes a new instance of the TRSChartGraphic class. (Inherited from RSChartPanel.TRSChartGraphic.)
	Destroy	Represents the destructor of the TRSChartGraphicArea class. (Overrides RSChartPanel.TRSChartGraphic.Destroy.)

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Name

Description

Brush

Determines the color and pattern for filling graphical shapes and backgrounds. Set the Brush property to specify the color and pattern to use when drawing the background or filling in graphical shapes.

OnChange

Occurs immediately after the chart graphic object changes. Write an OnChange event handler to take specific action when the chart graphic changes. The properties of the chart graphic reflect the new settings when OnChange occurs.

Warning
For chart graphics that a chart or chart panel creates, you shouldn't assign a handler to this event. The chart or chart panel has already assigned an event handler.

Opacity

Specifies the opacity of the graphic when drawn. The opacity is a value between 0 (invisible) and 1 (fully opaque). Any value in-between controls the transparency of the value.

Important Note
This is an FMX only feature. Any value > 0 is drawn fully opaque in the VCL version

Pen

Specifies the kind of pen the chart graphic area uses for drawing lines and outlining shapes. Set Pen to specify the pen to use for drawing lines and outlining shapes in the image.

Visible

Indicates whether this graphic should be drawn or not. The chart panel uses the Visible property to determine if it should call the Draw method for the chart graphic.
(Inherited from RSChartPanel.TRSChartGraphic.)

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Name

Description

Assign(TPersistent)

Copies the contents of another similar object to the current object

Notes to Inheritors
Most objects override Assign to handle the assignment of properties from similar objects. When overriding Assign, call the inherited method if the destination object cannot handle the assignment of properties from the class of the Source parameter

Changed

Overloaded. Represents method Changed. (Inherited from RSChartPanel.TRSChartGraphic.)

Clone

Creates a "deep" copy of the chart graphic. It constructs a new chart graphic of the correct type and then calls the Assign method to copy its properties to the new copy. (Inherited from RSChartPanel.TRSChartGraphic.)

Draw(TCanvas,TCanvasRect)

Overloaded. Paints the chart graphic to the specified Canvas in the specified location. It uses the current canvas' brush and pen. Use the Draw method to paint the chart graphic to any canvas and anywhere and with any size on the canvas.

Notes to Inheritors
Descendant classes of TRSChartGraphic override the InternalDraw method to actually paint themselves.

Draw(TCanvas,TCanvasRect,TRSChartAxis,TRSChartAxis)

The VertAxis and HorizAxis parameters can be used to provide point to pixel conversions (see RSChartPanel.TRSChartAxis ).

Notes to Inheritors
Descendant classes of TRSChartGraphic override the InternalDraw method to actually paint themselves.

Drawing(TCanvas,TCanvasRect)

Represents method Drawing(TCanvas,TCanvasRect). (Overrides RSChartPanel.TRSChartGraphic.Drawing(TCanvas,TCanvasRect).)

Drawn(TCanvas,TCanvasRect)

Represents method Drawn(TCanvas,TCanvasRect). (Inherited from RSChartPanel.TRSChartGraphic.)

Initialize

Represents method Initialize. (Overrides RSChartPanel.TRSChartGraphic.Initialize.)

InitializeEvents

Represents method InitializeEvents. (Overrides RSChartPanel.TRSChartGraphic.InitializeEvents.)

InternalDraw(TCanvas,TCanvasRect)

Represents method InternalDraw(TCanvas,TCanvasRect). (Overrides RSChartPanel.TRSChartGraphic.InternalDraw(TCanvas,TCanvasRect).)

SenderChanged(TObject)

Overloaded. Represents method SenderChanged(TObject). (Inherited from RSChartPanel.TRSChartGraphic.)

TiledDraw(TCanvas,TCanvasRect,TTileGraphic,TCanvasPixel,TCanvasPixel)

Overloaded. Tiles the image across the entire input rectangle.

The Image is drawn at full size from the top left of the ARect across and down until outside of the input rectangle. Use the overloaded TiledDraw methods to constrain the size of the Image.

TiledDraw(TCanvas,TCanvasRect,TTileGraphic,TCanvasPixel,TCanvasPixel,TCanvasPixel,TCanvasPixel)

Overloaded. Tiles the image across the entire input rectangle.

The Image is drawn at ImageWidth, ImageHeight size from the top left of the ARect across and down until outside of the input rectangle.

TiledDraw(TCanvas,TCanvasRect,TTileGraphic,TCanvasRect)

Overloaded. Tiles the image across the entire input rectangle.

The Image is drawn at ImageRect size from the top left of the ARect across and down until outside of the input rectangle.

VisibleChanged

Represents method VisibleChanged. (Inherited from RSChartPanel.TRSChartGraphic.)

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	Name	Description
	OnDraw	Occurs just after the chart graphic is painted. Write an OnDraw event handler to take specific action when the chart graphic has finished painting. The OnDraw event also allows you to do custom painting after the chart graphic has painted. (Inherited from RSChartPanel.TRSChartGraphic.)
	OnDrawing	Occurs just before the chart graphic is painted. Write an OnDrawing event handler to take specific action when the chart graphic is about to paint. If the event handler sets the DoDraw parameter to False, the chart graphic will not be painted. The OnDraw event also allows you to do custom painting before the chart graphic has been painted. (Inherited from RSChartPanel.TRSChartGraphic.)

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This class overrides the protected InternalDraw method (called by the Draw methods) to set the Canvas Brush and Pen to the Brush and Pen properties

Reference

•

Draw

•	RSChartPanel

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