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LazBarcodes: Add drawing methods for hexagons and rings (not tested, yet).
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@8216 8e941d3f-bd1b-0410-a28a-d453659cc2b4
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wp_xxyyzz
@ -27,6 +27,8 @@ type
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procedure EndDrawing; virtual; abstract;
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procedure DrawBar(x1, y1, x2, y2: Double); virtual; abstract;
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procedure DrawCenteredText(x, y: Double; const AText: String); virtual; abstract;
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procedure DrawHexagon(x, y, r: Double); virtual; abstract;
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procedure DrawRing(x, y, rOuter, rInner: Double); virtual; abstract;
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property BackColor: TColor read FBackColor write FBackColor;
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property BarColor: TColor read FBarColor write FBarColor;
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property TextColor: TColor read FTextColor write FTextColor;
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@ -51,6 +53,8 @@ type
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procedure EndDrawing; override;
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procedure DrawBar(x1, y1, x2, y2: double); override;
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procedure DrawCenteredText(x, y: double; const AText: String); override;
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procedure DrawHexagon(x, y, r: Double); override;
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procedure DrawRing(x, y, rOuter, rInner: Double); override;
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end;
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@ -79,6 +83,8 @@ type
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procedure EndDrawing; override;
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procedure DrawBar(x1, y1, x2, y2: double); override;
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procedure DrawCenteredText(x, y: double; const AText: String); override;
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procedure DrawHexagon(x, y, r: Double); override;
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procedure DrawRing(x, y, rOuter, rInner: Double); override;
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end;
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{ TEpsBarcodeDrawer }
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@ -86,17 +92,34 @@ type
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TEpsBarcodeDrawer = class(TTextBarcodeDrawer)
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private
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FStoredColor: TColor;
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procedure EpsColor(AColor: TColor; out R,G,B: Double);
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procedure EpsColor(AColor: TColor; out cR,cG,cB: Double);
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public
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procedure BeginDrawing; override;
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procedure EndDrawing; override;
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procedure DrawBar(x1, y1, x2, y2: Double); override;
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procedure DrawCenteredText(x, y: Double; const AText: String); override;
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procedure DrawHexagon(x, y, r: Double); override;
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procedure DrawRing(x, y, rOuter, rInner: Double); override;
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end;
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implementation
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type
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TDblPoint = record
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X, Y: Double;
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end;
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const
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HEXAGON: array[0..5] of TDblPoint = (
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(X: 1.0; Y: 0.0000000),
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(X: 0.5; Y: 0.8660254),
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(X:-0.5; Y: 0.8660254),
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(X:-1.0; Y: 0.0000000),
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(X:-0.5; Y:-0.8660254),
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(X: 0.5; Y:-0.8660254)
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);
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{ TBasicBarcodeDrawer }
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constructor TBasicBarcodeDrawer.Create(AWidth, AHeight: Double);
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@ -125,6 +148,7 @@ end;
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// Fill the background
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procedure TCanvasBarcodeDrawer.BeginDrawing;
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begin
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FCanvas.Pen.Style := psClear;
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FCanvas.Brush.Color := FBackColor;
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FCanvas.Brush.Style := bsSolid;
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FCanvas.FillRect(0, 0, round(FWidth), round(FHeight));
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@ -155,6 +179,34 @@ begin
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FCanvas.TextOut(round(x - w/2), round(y), AText);
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end;
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procedure TCanvasBarcodeDrawer.DrawHexagon(x, y, r: Double);
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var
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P: array[0..5] of TPoint;
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i: Integer;
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begin
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for i := 0 to 5 do
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P[i] := Point(round(x + HEXAGON[i].X*r), round(y + HEXAGON[i].Y*r));
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FCanvas.Brush.Color := FBarColor;
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FCanvas.Brush.Style := bsSolid;
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FCanvas.Pen.Style := psClear;
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FCanvas.Polygon(P);
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end;
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procedure TCanvasBarcodeDrawer.DrawRing(x, y, rOuter, rInner: Double);
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var
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r: Double;
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begin
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FCanvas.Pen.Color := FBarColor;
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FCanvas.Pen.Style := psSolid;
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if rOuter > rInner then
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FCanvas.Pen.Width := round(rOuter - rInner)
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else
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FCanvas.Pen.Width := round(rInner - rOuter);
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r := (rOuter + rInner) / 2;
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FCanvas.Ellipse(round(x+r), round(y+r), round(x-r), round(y-r));
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end;
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{ TTextBarcodeDrawer }
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@ -244,6 +296,35 @@ begin
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));
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end;
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procedure TSvgBarcodeDrawer.DrawHexagon(x, y, r: Double);
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var
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P: array[0..5] of TDblPoint;
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i: Integer;
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begin
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for i := 0 to 5 do
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begin
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P[i].X := x + HEXAGON[i].X*r;
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P[i].Y := y + HEXAGON[i].Y*r;
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end;
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FList.Add(Format(
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' <polygon fill="%s" points="%.3fmm,%.3fmm %.3fmm,%.3fmm %.3fmm,%.3fmm %.3fmm,%.3fmm %.3fmm,%.3fmm %.3fmm,%.3fmm" />',
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[SvgColor(FBarColor), P[0].X, P[0].Y, P[1].X, P[1].Y, P[2].X, P[2].Y, P[3].X, P[3].Y, P[4].X, P[4].Y, P[5].X, P[5].Y],
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FFormatSettings
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));
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end;
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procedure TSvgBarcodeDrawer.DrawRing(x, y, rOuter, rInner: Double);
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var
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r: Double;
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begin
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FList.Add(Format(
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' <circle cx="%.3fmm" cy="%.3fmm" r="%.3fmm" stroke-width="%.3fmm" stroke="%s" fill="none" />', [
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x, y, (rOuter + rInner)/2, abs(rOuter - rInner), SvgColor(FBarColor)],
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FFormatSettings
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));
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end;
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function TSvgBarcodeDrawer.SvgColor(AColor: TColor): String;
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type
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TRgb = packed record
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@ -302,12 +383,12 @@ end;
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procedure TEpsBarcodeDrawer.DrawBar(x1, y1, x2, y2: Double);
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var
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R, G, B: Double;
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cR, cG, cB: Double;
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begin
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if FStoredColor <> FBarColor then
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begin
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EpsColor(FBarColor, R,G,B);
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FList.Add(Format('%.2f %.2f %.2f setrgbcolor', [R, G, B], FFormatSettings));
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EpsColor(FBarColor, cR,cG,cB);
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FList.Add(Format('%.2f %.2f %.2f setrgbcolor', [cR, cG, cB], FFormatSettings));
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FStoredColor := FBarColor;
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end;
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FList.Add(Format('%0:.2f %1:.2f moveto %0:.2f %2:.2f lineto %3:.2f setlinewidth stroke',
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@ -316,12 +397,12 @@ end;
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procedure TEpsBarcodeDrawer.DrawCenteredText(x, y: Double; const AText: String);
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var
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R, G, B: Double;
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cR, cG, cB: Double;
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begin
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if FStoredColor <> FTextColor then
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begin
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EpsColor(FTextColor, R,G,B);
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FList.Add(Format('%.2f %.2f %.2f setrgbcolor', [R, G, B], FFormatSettings));
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EpsColor(FTextColor, cR,cG,cB);
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FList.Add(Format('%.2f %.2f %.2f setrgbcolor', [cR, cG, cB], FFormatSettings));
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FStoredColor := FTextColor;
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end;
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@ -329,7 +410,62 @@ begin
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FList.Add(Format('(%s) dup stringwidth pop 2 div neg -%.2f rmoveto show', [AText, 1.0*FFontSize], FFormatSettings));
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end;
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procedure TEpsBarcodeDrawer.EpsColor(AColor: TColor; out R,G,B: Double);
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procedure TEpsBarcodeDrawer.DrawHexagon(x, y, r: Double);
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var
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P: array[0..5] of TDblPoint;
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s: String;
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i: Integer;
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cR, cG, cB: Double;
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begin
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for i := 0 to 5 do
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begin
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P[i].X := x + HEXAGON[i].X*r;
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P[i].Y := y + HEXAGON[i].Y*r;
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end;
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if FStoredColor <> FBarColor then
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begin
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EpsColor(FBarColor, cR,cG,cB);
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FList.Add(Format('%.2f %.2f %.2f setrgbcolor', [cR, cG, cB], FFormatSettings));
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FStoredColor := FBarColor;
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end;
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FList.Add(Format(
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'newpath '+
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'%.2f %.2f moveto '+
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'%.2f %.2f lineto '+
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'%.2f %.2f lineto '+
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'%.2f %.2f lineto '+
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'%.2f %.2f lineto '+
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'%.2f %.2f lineto '+
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'0 setlinewidth '+
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'closepath '+
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'fill',
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[P[0].X, P[0].Y, P[1].X, P[1].Y, P[2].X, P[2].Y, P[3].X, P[3].Y, P[4].X, P[4].Y, P[5].X, P[5].Y],
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FFormatSettings
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));
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end;
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procedure TEpsBarcodeDrawer.DrawRing(x, y, rOuter, rInner: Double);
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var
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r: Double;
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cR, cG, cB: Double;
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begin
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if FStoredColor <> FBarColor then
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begin
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EpsColor(FBarColor, cR,cG,cB);
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FList.Add(Format('%.2f %.2f %.2f setrgbcolor', [cR, cG, cB], FFormatSettings));
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FStoredColor := FBarColor;
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end;
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FList.Add(Format(
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'%.2f setlinewidth %.2f %.2f %.2f 0 360 arc closepath',
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[abs(rOuter-rInner), x, y, (rOuter + rInner) / 2],
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FFormatSettings
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));
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end;
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procedure TEpsBarcodeDrawer.EpsColor(AColor: TColor; out cR,cG,cB: Double);
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type
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TRgb = packed record
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R, G, B: Byte;
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@ -337,9 +473,9 @@ type
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var
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rgb: TRgb absolute AColor;
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begin
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R := rgb.R / 255;
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G := rgb.G / 255;
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B := rgb.B / 255;
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cR := rgb.R / 255;
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cG := rgb.G / 255;
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cB := rgb.B / 255;
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end;
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end.
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