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TRSCustomChartLabel Class

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Extends the FMX.RS.ChartPanel.TRSChartGraphic class to provide the ability to draw a label. It also adds properties for the label, including Alignment, Font , and Text.

Namespace: FMX.RS.ChartPanel

TInterfacedPersistent
FMX.RS.ChartPanel.TRSChartGraphic
FMX.RS.ChartPanel.TRSCustomChartLabel
FMX.RS.ChartPanel.TRSChartLabelMetaData

Delphi

type
TRSCustomChartLabel = class(TRSChartGraphic)
end;

	Name	Description
	Create	Initializes a new instance of the TRSChartGraphic class. (Inherited from FMX.RS.ChartPanel.TRSChartGraphic.)
	Destroy	Represents the destructor of the TRSCustomChartLabel class. (Overrides FMX.RS.ChartPanel.TRSChartGraphic.Destroy.)

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	Name	Description
	Alignment	Specifies how the Text is aligned. The following are possible values of TAlignment:
taLeftJustify	Text is left-justified: Lines all begin at the left edge of the rectangle
taCenter	Text is centered in the rectangle
taRightJustify	Text is right-justified: Lines all end at the right edge of the rectangle

Angle

Specifies the angle in degrees at which the Text is rotated within the label. Specify an angle between 0 and 359 for the rotation. An angle of 0 specifies a normal text label while an angle of 90 specifies a text label drawn complete rotated on its side.

Font

Specifies the font used to draw the label Text. Set Font to specify the font to use for writing text. The value of Font is a TFont object. Set the properties of the TFont object to specify the font face, color, size, style, and any other aspects of the font (except for the Angle or rotation).

FontFill

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

Text

Specifies the text of the label

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 FMX.RS.ChartPanel.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 FMX.RS.ChartPanel.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 FMX.RS.ChartPanel.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 FMX.RS.ChartPanel.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 FMX.RS.ChartPanel.TRSChartGraphic.Drawing(TCanvas,TCanvasRect).)

Drawn(TCanvas,TCanvasRect)

Represents method Drawn(TCanvas,TCanvasRect). (Inherited from FMX.RS.ChartPanel.TRSChartGraphic.)

FreeNotification(TObject)

Represents method FreeNotification(TObject). (Inherited from FMX.RS.ChartPanel.TRSChartGraphic.)

GetText

Represents method GetText.

Initialize

Represents method Initialize. (Overrides FMX.RS.ChartPanel.TRSChartGraphic.Initialize.)

InitializeEvents

Represents method InitializeEvents. (Overrides FMX.RS.ChartPanel.TRSChartGraphic.InitializeEvents.)

InternalDraw(TCanvas,TCanvasRect)

Represents method InternalDraw(TCanvas,TCanvasRect). (Overrides FMX.RS.ChartPanel.TRSChartGraphic.InternalDraw(TCanvas,TCanvasRect).)

SenderChanged(TObject)

Overloaded. Represents method SenderChanged(TObject). (Inherited from FMX.RS.ChartPanel.TRSChartGraphic.)

SetFont(TFont)

Represents method SetFont(TFont).

SetText(String)

Represents method SetText(String).

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 FMX.RS.ChartPanel.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 FMX.RS.ChartPanel.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 FMX.RS.ChartPanel.TRSChartGraphic.)

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Reference

•	FMX.RS.ChartPanel.TRSChartPanel

•	FMX.RS.ChartPanel

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