Class TBGRACustomArrow
Unit
Declaration
type TBGRACustomArrow = class(TObject)
Description
Generic class configuring and rendering an arrow
Hierarchy
- TObject
- TBGRACustomArrow
Overview
Methods
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function ComputeEndAt(const APosition, ADirection: TPointF; const AWidth, ACurrentPos: single): ArrayOfTPointF; virtual; abstract; |
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function ComputeStartAt(const APosition, ADirection: TPointF; const AWidth, ACurrentPos: single): ArrayOfTPointF; virtual; abstract; |
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function GetEndOffsetX: single; virtual; abstract; |
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function GetEndRepeatCount: integer; virtual; abstract; |
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function GetEndSizeFactor: TPointF; virtual; abstract; |
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function GetIsEndDefined: boolean; virtual; abstract; |
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function GetIsStartDefined: boolean; virtual; abstract; |
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function GetLineCap: TPenEndCap; virtual; abstract; |
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function GetStartOffsetX: single; virtual; abstract; |
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function GetStartRepeatCount: integer; virtual; abstract; |
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function GetStartSizeFactor: TPointF; virtual; abstract; |
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procedure EndAsClassic(AFlipped: boolean = false; ACut: boolean = false; ARelativePenWidth: single = 1); virtual; abstract; |
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procedure EndAsNone; virtual; abstract; |
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procedure EndAsTail; virtual; abstract; |
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procedure EndAsTriangle(ABackOffset: single = 0; ARounded: boolean = false; AHollow: boolean = false; AHollowPenWidth: single = 0.5); virtual; abstract; |
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procedure StartAsClassic(AFlipped: boolean = false; ACut: boolean = false; ARelativePenWidth: single = 1); virtual; abstract; |
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procedure StartAsNone; virtual; abstract; |
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procedure StartAsTail; virtual; abstract; |
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procedure StartAsTriangle(ABackOffset: single = 0; ARounded: boolean = false; AHollow: boolean = false; AHollowPenWidth: single = 0.5); virtual; abstract; |
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procedure SetEndOffsetX(AValue: single); virtual; abstract; |
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procedure SetEndRepeatCount(AValue: integer); virtual; abstract; |
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procedure SetEndSizeFactor(AValue: TPointF); virtual; abstract; |
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procedure SetLineCap(AValue: TPenEndCap); virtual; abstract; |
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procedure SetStartOffsetX(AValue: single); virtual; abstract; |
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procedure SetStartRepeatCount(AValue: integer); virtual; abstract; |
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procedure SetStartSizeFactor(AValue: TPointF); virtual; abstract; |
Properties
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property EndOffsetX: single read GetEndOffsetX write SetEndOffsetX; |
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property EndRepeatCount: integer read GetEndRepeatCount write SetEndRepeatCount; |
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property EndSize: TPointF read GetEndSizeFactor write SetEndSizeFactor; |
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property IsEndDefined: boolean read GetIsEndDefined; |
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property IsStartDefined: boolean read GetIsStartDefined; |
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property LineCap: TPenEndCap read GetLineCap write SetLineCap; |
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property StartOffsetX: single read GetStartOffsetX write SetStartOffsetX; |
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property StartRepeatCount: integer read GetStartRepeatCount write SetStartRepeatCount; |
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property StartSize: TPointF read GetStartSizeFactor write SetStartSizeFactor; |
Description
Methods
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function ComputeEndAt(const APosition, ADirection: TPointF; const AWidth, ACurrentPos: single): ArrayOfTPointF; virtual; abstract; |
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Computes the end of the arrow at a given position and direction | |
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function ComputeStartAt(const APosition, ADirection: TPointF; const AWidth, ACurrentPos: single): ArrayOfTPointF; virtual; abstract; |
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Computes the start of the arrow at a given position and direction | |
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function GetEndOffsetX: single; virtual; abstract; |
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Retrieves the X-offset for the end of the arrow | |
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function GetEndRepeatCount: integer; virtual; abstract; |
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Retrieves the repeat count for the end symbol | |
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function GetEndSizeFactor: TPointF; virtual; abstract; |
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Retrieves the size factor for the end of the arrow | |
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function GetIsEndDefined: boolean; virtual; abstract; |
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Determines if the end of the arrow is defined | |
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function GetIsStartDefined: boolean; virtual; abstract; |
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Determines if the start of the arrow is defined | |
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function GetLineCap: TPenEndCap; virtual; abstract; |
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Retrieves the line cap style for the classic arrow | |
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function GetStartOffsetX: single; virtual; abstract; |
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Retrieves the X-offset for the start of the arrow | |
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function GetStartRepeatCount: integer; virtual; abstract; |
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Retrieves the repeat count for the start symbol | |
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function GetStartSizeFactor: TPointF; virtual; abstract; |
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procedure EndAsClassic(AFlipped: boolean = false; ACut: boolean = false; ARelativePenWidth: single = 1); virtual; abstract; |
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Sets the end of the arrow to a classic style | |
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procedure EndAsNone; virtual; abstract; |
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Sets the end of the arrow to no style | |
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procedure EndAsTail; virtual; abstract; |
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Sets the end of the arrow to a tail style | |
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procedure EndAsTriangle(ABackOffset: single = 0; ARounded: boolean = false; AHollow: boolean = false; AHollowPenWidth: single = 0.5); virtual; abstract; |
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Sets the end of the arrow to a triangle style | |
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procedure StartAsClassic(AFlipped: boolean = false; ACut: boolean = false; ARelativePenWidth: single = 1); virtual; abstract; |
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Sets the start of the arrow to a classic style | |
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procedure StartAsNone; virtual; abstract; |
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Sets the start of the arrow to no style | |
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procedure StartAsTail; virtual; abstract; |
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Sets the start of the arrow to a tail style | |
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procedure StartAsTriangle(ABackOffset: single = 0; ARounded: boolean = false; AHollow: boolean = false; AHollowPenWidth: single = 0.5); virtual; abstract; |
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Sets the start of the arrow to a triangle style | |
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procedure SetEndOffsetX(AValue: single); virtual; abstract; |
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Sets the X-offset for the end of the arrow | |
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procedure SetEndRepeatCount(AValue: integer); virtual; abstract; |
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Sets the repeat count for the end symbol | |
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procedure SetEndSizeFactor(AValue: TPointF); virtual; abstract; |
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Sets the size factor for the end of the arrow | |
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procedure SetLineCap(AValue: TPenEndCap); virtual; abstract; |
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Sets the line cap style for the classic arrow | |
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procedure SetStartOffsetX(AValue: single); virtual; abstract; |
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Sets the X-offset for the start of the arrow | |
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procedure SetStartRepeatCount(AValue: integer); virtual; abstract; |
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Sets the repeat count for the start symbol | |
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procedure SetStartSizeFactor(AValue: TPointF); virtual; abstract; |
Properties
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property EndOffsetX: single read GetEndOffsetX write SetEndOffsetX; |
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X-offset for the end of the arrow | |
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property EndRepeatCount: integer read GetEndRepeatCount write SetEndRepeatCount; |
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Repeat count for the end symbol | |
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property EndSize: TPointF read GetEndSizeFactor write SetEndSizeFactor; |
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Size factor for the end of the arrow | |
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property IsEndDefined: boolean read GetIsEndDefined; |
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Check if the end of the arrow is defined | |
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property IsStartDefined: boolean read GetIsStartDefined; |
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Check if the start of the arrow is defined | |
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property LineCap: TPenEndCap read GetLineCap write SetLineCap; |
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Line cap style | |
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property StartOffsetX: single read GetStartOffsetX write SetStartOffsetX; |
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X-offset for the start of the arrow | |
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property StartRepeatCount: integer read GetStartRepeatCount write SetStartRepeatCount; |
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Repeat count for the start symbol | |
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property StartSize: TPointF read GetStartSizeFactor write SetStartSizeFactor; |