mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-11-04 06:39:31 +01:00
744 lines
20 KiB
ObjectPascal
744 lines
20 KiB
ObjectPascal
{
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/***************************************************************************
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TATypes.pas
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-----------
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Component Library Standard Graph Element Types
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***************************************************************************/
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*****************************************************************************
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* *
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* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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Authors: Luнs Rodrigues, Philippe Martinole, Alexander Klenin
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}
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unit TATypes;
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{$H+}
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interface
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uses
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Classes, Graphics, Controls, FPCanvas,
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TAChartUtils, TADrawUtils;
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const
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DEF_MARGIN = 4;
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DEF_MARKS_DISTANCE = 20;
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DEF_POINTER_SIZE = 4;
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MARKS_YINDEX_ALL = -1;
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DEF_ARROW_LENGTH = 10;
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DEF_ARROW_WIDTH = 5;
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DEF_SHADOW_OFFSET = 8;
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DEF_SHADOW_TRANSPARENCY = 128;
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type
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TCustomChart = class(TCustomControl)
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public
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procedure StyleChanged(Sender: TObject); virtual; abstract;
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procedure ZoomFull(AImmediateRecalc: Boolean = false); virtual; abstract;
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end;
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{ TChartPen }
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TChartPen = class(TPen)
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strict private
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FVisible: Boolean;
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procedure SetVisible(AValue: Boolean);
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public
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constructor Create; override;
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public
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procedure Assign(ASource: TPersistent); override;
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published
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property Visible: Boolean read FVisible write SetVisible default true;
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end;
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TClearBrush = class(TBrush)
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published
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property Style default bsClear;
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end;
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TFPCanvasHelperClass = class of TFPCanvasHelper;
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{ TChartElement }
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TChartElement = class(TPersistent)
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strict protected
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FOwner: TCustomChart;
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FVisible: Boolean;
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procedure InitHelper(var AResult; AClass: TFPCanvasHelperClass);
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procedure SetVisible(AValue: Boolean);
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procedure StyleChanged(Sender: TObject); virtual;
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protected
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function GetOwner: TPersistent; override;
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public
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constructor Create(AOwner: TCustomChart);
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public
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procedure Assign(ASource: TPersistent); override;
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procedure SetOwner(AOwner: TCustomChart);
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property Visible: Boolean read FVisible write SetVisible;
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end;
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TSeriesPointerStyle = (
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psNone, psRectangle, psCircle, psCross, psDiagCross, psStar,
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psLowBracket, psHighBracket, psLeftBracket, psRightBracket, psDiamond,
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psTriangle, psLeftTriangle, psRightTriangle, psVertBar, psHorBar);
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{ TSeriesPointer }
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TSeriesPointer = class(TChartElement)
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strict private
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FBrush: TBrush;
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FHorizSize: Integer;
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FOverrideColor: TOverrideColors;
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FPen: TChartPen;
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FStyle: TSeriesPointerStyle;
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FVertSize: Integer;
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procedure SetBrush(AValue: TBrush);
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procedure SetHorizSize(AValue: Integer);
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procedure SetOverrideColor(AValue: TOverrideColors);
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procedure SetPen(AValue: TChartPen);
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procedure SetStyle(AValue: TSeriesPointerStyle);
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procedure SetVertSize(AValue: Integer);
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public
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constructor Create(AOwner: TCustomChart);
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destructor Destroy; override;
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public
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procedure Assign(Source: TPersistent); override;
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procedure Draw(ADrawer: IChartDrawer; ACenter: TPoint; AColor: TColor);
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procedure DrawSize(
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ADrawer: IChartDrawer; ACenter, ASize: TPoint; AColor: TColor;
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AAngle: Double = 0.0);
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published
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property Brush: TBrush read FBrush write SetBrush;
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property HorizSize: Integer read FHorizSize write SetHorizSize default DEF_POINTER_SIZE;
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property OverrideColor: TOverrideColors
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read FOverrideColor write SetOverrideColor default [ocBrush];
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property Pen: TChartPen read FPen write SetPen;
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property Style: TSeriesPointerStyle read FStyle write SetStyle default psRectangle;
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property VertSize: Integer read FVertSize write SetVertSize default DEF_POINTER_SIZE;
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property Visible default true;
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end;
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EExtentError = class(EChartError);
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TChartRange = class(TChartElement)
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strict private
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FBounds: array [1..2] of Double;
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FUseBounds: array [1..2] of Boolean;
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function GetBounds(AIndex: Integer): Double;
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function GetUseBounds(AIndex: integer): Boolean;
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function IsBoundsStored(AIndex: Integer): Boolean;
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procedure SetBounds(AIndex: Integer; const AValue: Double);
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procedure SetUseBounds(AIndex: Integer; AValue: Boolean);
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public
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procedure Assign(ASource: TPersistent); override;
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procedure CheckBoundsOrder;
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procedure Intersect(var AMin, AMax: Double);
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published
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property Max: Double index 2 read GetBounds write SetBounds stored IsBoundsStored;
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property Min: Double index 1 read GetBounds write SetBounds stored IsBoundsStored;
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property UseMax: Boolean index 2 read GetUseBounds write SetUseBounds default false;
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property UseMin: Boolean index 1 read GetUseBounds write SetUseBounds default false;
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end;
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{ TChartExtent }
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TChartExtent = class(TChartElement)
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strict private
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FExtent: TDoubleRect;
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FUseBounds: array [1..4] of Boolean;
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function GetBounds(AIndex: Integer): Double;
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function GetUseBounds(AIndex: integer): Boolean;
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function IsBoundsStored(AIndex: Integer): Boolean;
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procedure SetBounds(AIndex: Integer; const AValue: Double);
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procedure SetUseBounds(AIndex: Integer; AValue: Boolean);
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public
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procedure Assign(ASource: TPersistent); override;
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procedure CheckBoundsOrder;
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procedure FixTo(const ABounds: TDoubleRect);
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published
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property UseXMax: Boolean index 3 read GetUseBounds write SetUseBounds default false;
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property UseXMin: Boolean index 1 read GetUseBounds write SetUseBounds default false;
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property UseYMax: Boolean index 4 read GetUseBounds write SetUseBounds default false;
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property UseYMin: Boolean index 2 read GetUseBounds write SetUseBounds default false;
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property XMax: Double index 3 read GetBounds write SetBounds stored IsBoundsStored;
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property XMin: Double index 1 read GetBounds write SetBounds stored IsBoundsStored;
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property YMax: Double index 4 read GetBounds write SetBounds stored IsBoundsStored;
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property YMin: Double index 2 read GetBounds write SetBounds stored IsBoundsStored;
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end;
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TChartExtentHistory = specialize THistory<TDoubleRect>;
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TRectArray = array [1..4] of Integer;
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{ TChartMargins }
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TChartMargins = class(TChartElement)
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strict private
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FData: record
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case Integer of
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0: (FRect: TRect;);
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1: (FCoords: TRectArray;);
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end;
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public
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constructor Create(AOwner: TCustomChart);
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function GetValue(AIndex: Integer): Integer;
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procedure SetValue(AIndex: Integer; AValue: TChartDistance);
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public
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procedure Assign(Source: TPersistent); override;
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procedure ExpandRectScaled(ADrawer: IChartDrawer; var ARect: TRect);
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property Data: TRect read FData.FRect;
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published
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property Left: TChartDistance index 1 read GetValue write SetValue default DEF_MARGIN;
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property Top: TChartDistance index 2 read GetValue write SetValue default DEF_MARGIN;
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property Right: TChartDistance index 3 read GetValue write SetValue default DEF_MARGIN;
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property Bottom: TChartDistance index 4 read GetValue write SetValue default DEF_MARGIN;
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end;
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TChartArrow = class(TChartElement)
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strict private
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FBaseLength: TChartDistance;
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FLength: TChartDistance;
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FWidth: TChartDistance;
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procedure SetBaseLength(AValue: TChartDistance);
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procedure SetLength(AValue: TChartDistance);
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procedure SetWidth(AValue: TChartDistance);
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public
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constructor Create(AOwner: TCustomChart);
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public
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procedure Assign(ASource: TPersistent); override;
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procedure Draw(
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ADrawer: IChartDrawer; const AEndPos: TPoint; AAngle: Double;
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APen: TFPCustomPen);
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published
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property BaseLength: TChartDistance
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read FBaseLength write SetBaseLength default 0;
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property Length: TChartDistance
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read FLength write SetLength default DEF_ARROW_LENGTH;
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property Visible default false;
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property Width: TChartDistance
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read FWidth write SetWidth default DEF_ARROW_WIDTH;
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end;
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TChartShadow = class(TChartElement)
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strict private
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FColor: TColor;
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FOffset: TPoint;
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FTransparency: TChartTransparency;
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procedure SetColor(AValue: TColor);
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procedure SetOffsetX(AValue: Integer);
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procedure SetOffsetY(AValue: Integer);
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procedure SetTransparency(AValue: TChartTransparency);
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public
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constructor Create(AOwner: TCustomChart);
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public
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procedure Assign(ASource: TPersistent); override;
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published
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property Color: TColor read FColor write SetColor default clBlack;
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property OffsetX: Integer read FOffset.X write SetOffsetX default DEF_SHADOW_OFFSET;
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property OffsetY: Integer read FOffset.Y write SetOffsetY default DEF_SHADOW_OFFSET;
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property Transparency: TChartTransparency
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read FTransparency write SetTransparency default DEF_SHADOW_TRANSPARENCY;
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property Visible default false;
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end;
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implementation
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uses
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Math, SysUtils,
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TAGeometry;
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{ TChartPen }
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procedure TChartPen.Assign(ASource: TPersistent);
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begin
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if ASource is TChartPen then
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FVisible := TChartPen(ASource).Visible;
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inherited Assign(ASource);
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end;
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constructor TChartPen.Create;
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begin
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inherited Create;
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SetPropDefaults(Self, ['Color', 'Style', 'Visible']);
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end;
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procedure TChartPen.SetVisible(AValue: Boolean);
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begin
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FVisible := AValue;
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if Assigned(OnChange) then OnChange(Self);
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end;
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{ TChartElement }
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procedure TChartElement.Assign(ASource: TPersistent);
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begin
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if ASource is TChartElement then
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with TChartElement(ASource) do begin
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Self.FVisible := FVisible;
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Self.FOwner := FOwner;
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end;
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end;
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constructor TChartElement.Create(AOwner: TCustomChart);
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begin
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inherited Create;
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FOwner := AOwner;
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end;
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function TChartElement.GetOwner: TPersistent;
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begin
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Result := FOwner;
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end;
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procedure TChartElement.InitHelper(var AResult; AClass: TFPCanvasHelperClass);
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begin
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TFPCanvasHelper(AResult) := AClass.Create;
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TFPCanvasHelper(AResult).OnChange := @StyleChanged;
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end;
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procedure TChartElement.SetOwner(AOwner: TCustomChart);
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begin
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FOwner := AOwner;
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end;
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procedure TChartElement.SetVisible(AValue: Boolean);
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begin
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if FVisible = AValue then exit;
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FVisible := AValue;
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StyleChanged(Self);
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end;
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procedure TChartElement.StyleChanged(Sender: TObject);
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begin
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if FOwner <> nil then
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FOwner.StyleChanged(Sender);
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end;
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{ TSeriesPointer }
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procedure TSeriesPointer.Assign(Source: TPersistent);
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begin
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if Source is TSeriesPointer then
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with TSeriesPointer(Source) do begin
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Self.FBrush.Assign(Brush);
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Self.FHorizSize := HorizSize;
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Self.FOverrideColor := OverrideColor;
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Self.FPen.Assign(Pen);
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Self.FStyle := Style;
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Self.FVertSize := VertSize;
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end;
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inherited Assign(Source);
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end;
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constructor TSeriesPointer.Create(AOwner: TCustomChart);
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begin
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inherited Create(AOwner);
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InitHelper(FBrush, TBrush);
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InitHelper(FPen, TChartPen);
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FHorizSize := DEF_POINTER_SIZE;
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SetPropDefaults(Self, ['OverrideColor', 'Style']);
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FVertSize := DEF_POINTER_SIZE;
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FVisible := true;
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end;
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destructor TSeriesPointer.Destroy;
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begin
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FreeAndNil(FBrush);
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FreeAndNil(FPen);
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inherited;
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end;
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procedure TSeriesPointer.Draw(
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ADrawer: IChartDrawer; ACenter: TPoint; AColor: TColor);
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begin
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DrawSize(ADrawer, ACenter, Point(HorizSize, VertSize), AColor);
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end;
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procedure TSeriesPointer.DrawSize(ADrawer: IChartDrawer;
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ACenter, ASize: TPoint; AColor: TColor; AAngle: Double);
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function PointByIndex(AIndex: Char): TPoint; inline;
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// 7--8--9
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// 4 5 6
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// 1--2--3
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const
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V: array ['1'..'9'] of -1..1 = (1, 1, 1, 0, 0, 0, -1, -1, -1);
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H: array ['1'..'9'] of -1..1 = (-1, 0, 1, -1, 0, 1, -1, 0, 1);
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begin
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Result := ACenter + RotatePoint(
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Point(H[AIndex] * ASize.X, V[AIndex] * ASize.Y), AAngle);
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end;
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procedure DrawByString(const AStr: String);
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var
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pts: array of TPoint;
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i: Integer;
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j: Integer = 0;
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begin
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SetLength(pts, Length(AStr));
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for i := 1 to Length(AStr) do begin
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if AStr[i] = ' ' then begin
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if Brush.Style = bsClear then
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ADrawer.Polyline(pts, 0, j)
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else
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ADrawer.Polygon(pts, 0, j); // Winding?
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j := 0;
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end
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else begin
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pts[j] := PointByIndex(AStr[i]);
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Inc(j);
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end;
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end;
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end;
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const
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DRAW_STRINGS: array [TSeriesPointerStyle] of String = (
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// psNone, psRectangle, psCircle, psCross, psDiagCross, psStar,
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// psLowBracket, psHighBracket, psLeftBracket, psRightBracket, psDiamond,
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// psTriangle, psLeftTriangle, psRightTriangle, psVertBar, psHorBar
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'', '17931', '', '28 46', '19 73', '28 46 19 73',
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'41236', '47896', '87412', '89632', '84268',
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'183', '842', '862', '82', '46');
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begin
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ADrawer.Brush := Brush;
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if (ocBrush in OverrideColor) and (AColor <> clTAColor) then
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ADrawer.BrushColor := AColor;
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ADrawer.Pen := Pen;
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if (ocPen in OverrideColor) and (AColor <> clTAColor) then
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ADrawer.SetPenParams(Pen.Style, AColor);
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if Style = psCircle then
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ADrawer.Ellipse(
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ACenter.X - ASize.X, ACenter.Y - ASize.Y,
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ACenter.X + ASize.X + 1, ACenter.Y + ASize.Y + 1)
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else
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DrawByString(DRAW_STRINGS[Style] + ' ');
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end;
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procedure TSeriesPointer.SetBrush(AValue: TBrush);
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begin
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FBrush.Assign(AValue);
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StyleChanged(Self);
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end;
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procedure TSeriesPointer.SetHorizSize(AValue: Integer);
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begin
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if FHorizSize = AValue then exit;
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FHorizSize := AValue;
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StyleChanged(Self);
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end;
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procedure TSeriesPointer.SetOverrideColor(AValue: TOverrideColors);
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begin
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if FOverrideColor = AValue then exit;
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FOverrideColor := AValue;
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StyleChanged(Self);
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end;
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procedure TSeriesPointer.SetPen(AValue: TChartPen);
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begin
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FPen.Assign(AValue);
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StyleChanged(Self);
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end;
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procedure TSeriesPointer.SetStyle(AValue: TSeriesPointerStyle);
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begin
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if FStyle = AValue then exit;
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FStyle := AValue;
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StyleChanged(Self);
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end;
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procedure TSeriesPointer.SetVertSize(AValue: Integer);
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begin
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if FVertSize = AValue then exit;
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FVertSize := AValue;
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StyleChanged(Self);
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end;
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{ TChartRange }
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procedure TChartRange.Assign(ASource: TPersistent);
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begin
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if ASource is TChartRange then
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with TChartRange(ASource) do begin
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Self.FBounds := FBounds;
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Self.FUseBounds := FUseBounds;
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end;
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inherited Assign(ASource);
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end;
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procedure TChartRange.CheckBoundsOrder;
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begin
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if UseMin and UseMax and (Min >= Max) then begin
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UseMin := false;
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UseMax := false;
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raise EExtentError.Create('ChartRange: Min >= Max');
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end;
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end;
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function TChartRange.GetBounds(AIndex: Integer): Double;
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begin
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Result := FBounds[AIndex];
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end;
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function TChartRange.GetUseBounds(AIndex: integer): Boolean;
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begin
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Result := FUseBounds[AIndex];
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end;
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procedure TChartRange.Intersect(var AMin, AMax: Double);
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begin
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if UseMin and (Min > AMin) then
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AMin := Min;
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if UseMax and (Max < AMax)then
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AMax := Max;
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end;
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function TChartRange.IsBoundsStored(AIndex: Integer): Boolean;
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begin
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Result := FBounds[AIndex] <> 0;
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end;
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procedure TChartRange.SetBounds(AIndex: Integer; const AValue: Double);
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begin
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FBounds[AIndex] := AValue;
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StyleChanged(Self);
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end;
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procedure TChartRange.SetUseBounds(AIndex: Integer; AValue: Boolean);
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begin
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FUseBounds[AIndex] := AValue;
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StyleChanged(Self);
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end;
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{ TChartExtent }
|
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procedure TChartExtent.Assign(ASource: TPersistent);
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begin
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if ASource is TChartExtent then
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with TChartExtent(ASource) do begin
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Self.FExtent := FExtent;
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Self.FUseBounds := FUseBounds;
|
|
end;
|
|
inherited Assign(ASource);
|
|
end;
|
|
|
|
procedure TChartExtent.CheckBoundsOrder;
|
|
begin
|
|
if UseXMin and UseXMax and (XMin >= XMax) then begin
|
|
UseXMin := false;
|
|
UseXMax := false;
|
|
raise EExtentError.Create('ChartExtent: XMin >= XMax');
|
|
end;
|
|
if UseYMin and UseYMax and (YMin >= YMax) then begin
|
|
UseYMin := false;
|
|
UseYMax := false;
|
|
raise EExtentError.Create('ChartExtent: YMin >= YMax');
|
|
end;
|
|
end;
|
|
|
|
procedure TChartExtent.FixTo(const ABounds: TDoubleRect);
|
|
begin
|
|
FExtent := ABounds;
|
|
FillChar(FUseBounds, SizeOf(FUseBounds), true);
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
function TChartExtent.GetBounds(AIndex: Integer): Double;
|
|
begin
|
|
Result := FExtent.coords[AIndex];
|
|
end;
|
|
|
|
function TChartExtent.GetUseBounds(AIndex: Integer): Boolean;
|
|
begin
|
|
Result := FUseBounds[AIndex];
|
|
end;
|
|
|
|
function TChartExtent.IsBoundsStored(AIndex: Integer): Boolean;
|
|
begin
|
|
Result := FExtent.coords[AIndex] <> 0;
|
|
end;
|
|
|
|
procedure TChartExtent.SetBounds(AIndex: Integer; const AValue: Double);
|
|
begin
|
|
FExtent.coords[AIndex] := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
procedure TChartExtent.SetUseBounds(AIndex: Integer; AValue: Boolean);
|
|
begin
|
|
FUseBounds[AIndex] := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
{ TChartMargins }
|
|
|
|
procedure TChartMargins.Assign(Source: TPersistent);
|
|
begin
|
|
if Source is TChartMargins then
|
|
TChartMargins(Source).FData.FRect := Data;
|
|
inherited Assign(Source);
|
|
end;
|
|
|
|
constructor TChartMargins.Create(AOwner: TCustomChart);
|
|
begin
|
|
inherited Create(AOwner);
|
|
SetPropDefaults(Self, ['Left', 'Top', 'Right', 'Bottom']);
|
|
end;
|
|
|
|
procedure TChartMargins.ExpandRectScaled(
|
|
ADrawer: IChartDrawer; var ARect: TRect);
|
|
begin
|
|
ARect.TopLeft -= Point(ADrawer.Scale(Left), ADrawer.Scale(Top));
|
|
ARect.BottomRight += Point(ADrawer.Scale(Right), ADrawer.Scale(Bottom));
|
|
end;
|
|
|
|
function TChartMargins.GetValue(AIndex: Integer): Integer;
|
|
begin
|
|
Result := FData.FCoords[AIndex];
|
|
end;
|
|
|
|
procedure TChartMargins.SetValue(AIndex: Integer; AValue: TChartDistance);
|
|
begin
|
|
if FData.FCoords[AIndex] = AValue then exit;
|
|
FData.FCoords[AIndex] := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
{ TChartArrow }
|
|
|
|
procedure TChartArrow.Assign(ASource: TPersistent);
|
|
begin
|
|
if ASource is TChartArrow then
|
|
with TChartArrow(ASource) do begin
|
|
Self.FBaseLength := FBaseLength;
|
|
Self.FLength := FLength;
|
|
Self.FWidth := FWidth;
|
|
end;
|
|
inherited Assign(ASource);
|
|
end;
|
|
|
|
constructor TChartArrow.Create(AOwner: TCustomChart);
|
|
begin
|
|
inherited Create(AOwner);
|
|
FLength := DEF_ARROW_LENGTH;
|
|
FVisible := false;
|
|
FWidth := DEF_ARROW_WIDTH;
|
|
end;
|
|
|
|
procedure TChartArrow.Draw(
|
|
ADrawer: IChartDrawer; const AEndPos: TPoint; AAngle: Double;
|
|
APen: TFPCustomPen);
|
|
var
|
|
da: Double;
|
|
diag: Integer;
|
|
pt1, pt2, ptBase: TPoint;
|
|
begin
|
|
if not Visible then exit;
|
|
da := ArcTan2(Width, Length);
|
|
|
|
diag := -ADrawer.Scale(Round(Sqrt(Sqr(Length) + Sqr(Width))));
|
|
pt1 := AEndPos + RotatePointX(diag, AAngle - da);
|
|
pt2 := AEndPos + RotatePointX(diag, AAngle + da);
|
|
if BaseLength > 0 then begin
|
|
ptBase := AEndPos + RotatePointX(-ADrawer.Scale(BaseLength), AAngle);
|
|
ADrawer.SetBrushParams(bsSolid, FPColorToChartColor(APen.FPColor));
|
|
ADrawer.Polygon([pt1, AEndPos, pt2, ptBase], 0, 4);
|
|
end
|
|
else
|
|
ADrawer.Polyline([pt1, AEndPos, pt2], 0, 3);
|
|
end;
|
|
|
|
procedure TChartArrow.SetBaseLength(AValue: TChartDistance);
|
|
begin
|
|
if FBaseLength = AValue then exit;
|
|
FBaseLength := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
procedure TChartArrow.SetLength(AValue: TChartDistance);
|
|
begin
|
|
if FLength = AValue then exit;
|
|
FLength := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
procedure TChartArrow.SetWidth(AValue: TChartDistance);
|
|
begin
|
|
if FWidth = AValue then exit;
|
|
FWidth := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
{ TChartShadow }
|
|
|
|
procedure TChartShadow.Assign(ASource: TPersistent);
|
|
begin
|
|
if ASource is TChartShadow then
|
|
with TChartShadow(ASource) do begin
|
|
Self.FColor := Color;
|
|
Self.FOffset := FOffset;
|
|
Self.FTransparency := Transparency;
|
|
end;
|
|
inherited Assign(ASource);
|
|
end;
|
|
|
|
constructor TChartShadow.Create(AOwner: TCustomChart);
|
|
begin
|
|
inherited Create(AOwner);
|
|
FColor := clBlack;
|
|
FOffset := Point(DEF_SHADOW_OFFSET, DEF_SHADOW_OFFSET);
|
|
FTransparency := DEF_SHADOW_TRANSPARENCY;
|
|
end;
|
|
|
|
procedure TChartShadow.SetColor(AValue: TColor);
|
|
begin
|
|
if FColor = AValue then exit;
|
|
FColor := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
procedure TChartShadow.SetOffsetX(AValue: Integer);
|
|
begin
|
|
if FOffset.X = AValue then exit;
|
|
FOffset.X := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
procedure TChartShadow.SetOffsetY(AValue: Integer);
|
|
begin
|
|
if FOffset.Y = AValue then exit;
|
|
FOffset.Y := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
procedure TChartShadow.SetTransparency(AValue: TChartTransparency);
|
|
begin
|
|
if FTransparency = AValue then exit;
|
|
FTransparency := AValue;
|
|
StyleChanged(Self);
|
|
end;
|
|
|
|
end.
|
|
|