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updated project paths for examples git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@2236 8e941d3f-bd1b-0410-a28a-d453659cc2b4
82 lines
1.8 KiB
ObjectPascal
82 lines
1.8 KiB
ObjectPascal
unit nvBaseFont;
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{$mode objfpc}{$H+}
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interface
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uses
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fpimage;
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type
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{ TNVBaseFont }
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TNVBaseFont = class
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private
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FAngle: double;
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FFlags: word;
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FName: string;
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FSize: integer;
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function GetFlags(AIndex: integer): boolean;
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procedure SetFlags(AIndex: integer; AValue: boolean);
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protected
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procedure SetAngle(AValue: double); virtual;
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public
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constructor Create(AName: string; ASize: integer);
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//font characteristics
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property Name: string read FName;
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property Size: integer read FSize;
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//text metrics
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function TextHeight(Text: string): integer; virtual; abstract;
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function TextWidth(Text: string): integer; virtual; abstract;
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procedure TextSize(Text: string; var w, h: integer); virtual; abstract;
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//font flags <<possibly not implemented for all font classes>>
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property Angle: double read FAngle write SetAngle;
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property Bold: boolean index 1 read GetFlags write SetFlags;
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property Italic: boolean index 2 read GetFlags write SetFlags;
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property StrikeTrough: boolean index 3 read GetFlags write SetFlags;
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property Underline: boolean index 4 read GetFlags write SetFlags;
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//printing function
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procedure TextOut(x, y: double; Text: string); virtual; abstract;
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end;
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implementation
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{ TNVBaseFont }
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function TNVBaseFont.GetFlags(AIndex: integer): boolean;
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begin
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Result := (FFlags and (1 shl AIndex)) <> 0;
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end;
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procedure TNVBaseFont.SetFlags(AIndex: integer; AValue: boolean);
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begin
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if AValue then
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FFlags := FFlags or (1 shl AIndex)
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else
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FFlags := FFlags and not (1 shl AIndex);
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end;
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procedure TNVBaseFont.SetAngle(AValue: double);
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begin
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if FAngle <> AValue then
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FAngle := AValue;
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end;
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constructor TNVBaseFont.Create(AName: string; ASize: integer);
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begin
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FAngle := 0;
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FFlags:= 0;
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FName := AName;
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FSize := ASize;
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end;
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end.
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