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https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-05-15 19:22:41 +02:00
TChart: Introduce TChartAxisAlignment and TChartAxisList
* First step for adding support for multiple axises * Does not yet change any user-visible behaviour git-svn-id: trunk@20312 -
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@ -107,19 +107,15 @@ type
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TChartSeriesList = class(TPersistent)
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private
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FChart: TChart;
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FList: TFPList;
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function GetItem(AIndex: Integer): TBasicChartSeries;
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procedure SetItem(AIndex: Integer; const AValue: TBasicChartSeries);
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public
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function Count: Integer;
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constructor Create(AOwner: TChart);
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constructor Create;
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destructor Destroy; override;
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public
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property Chart: TChart read FChart;
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property Items[AIndex: Integer]: TBasicChartSeries
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read GetItem write SetItem; default;
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property Items[AIndex: Integer]: TBasicChartSeries read GetItem; default;
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end;
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{ TChart }
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@ -130,14 +126,12 @@ type
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FAxisColor: TColor;
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FAxisVisible: Boolean;
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FBackColor: TColor;
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FBottomAxis: TChartAxis;
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FDepth: TChartZPosition;
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FExpandPercentage: Integer;
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FExtent: TChartExtent;
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FFoot: TChartTitle;
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FFrame: TChartPen;
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FGraphBrush: TBrush;
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FLeftAxis: TChartAxis;
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FLegend: TChartLegend;
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FMargins: TChartMargins;
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FOnDrawReticule: TDrawReticuleEvent;
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@ -145,6 +139,7 @@ type
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FTitle: TChartTitle;
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private
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FAxisList: TChartAxisList;
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FClipRect: TRect;
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FCurrentExtent: TDoubleRect;
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FIsMouseDown: Boolean;
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@ -157,6 +152,7 @@ type
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procedure CalculateTransformationCoeffs(const AMargin: TRect);
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procedure DrawReticule(ACanvas: TCanvas);
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function GetAxis(AIndex: integer): TChartAxis; inline;
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function GetChartHeight: Integer;
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function GetChartWidth: Integer;
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function GetLegendWidth(ACanvas: TCanvas): Integer;
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@ -165,17 +161,16 @@ type
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function GetSeriesInZOrder: TFPList;
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procedure PrepareXorPen;
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procedure SetAxis(AIndex: Integer; AValue: TChartAxis);
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procedure SetAxisColor(const AValue: TColor);
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procedure SetAxisVisible(Value: Boolean);
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procedure SetBackColor(const AValue: TColor);
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procedure SetBottomAxis(Value: TChartAxis);
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procedure SetDepth(AValue: TChartZPosition);
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procedure SetExpandPercentage(AValue: Integer);
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procedure SetExtent(const AValue: TChartExtent);
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procedure SetFoot(Value: TChartTitle);
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procedure SetFrame(Value: TChartPen);
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procedure SetGraphBrush(Value: TBrush);
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procedure SetLeftAxis(Value: TChartAxis);
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procedure SetLegend(Value: TChartLegend);
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procedure SetMargins(AValue: TChartMargins);
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procedure SetReticuleMode(const AValue: TReticuleMode);
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@ -252,7 +247,7 @@ type
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property AxisColor: TColor read FAxisColor write SetAxisColor default clBlack;
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property AxisVisible: Boolean read FAxisVisible write SetAxisVisible default true;
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property BackColor: TColor read FBackColor write SetBackColor default clBtnFace;
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property BottomAxis: TChartAxis read FBottomAxis write SetBottomAxis;
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property BottomAxis: TChartAxis index 1 read GetAxis write SetAxis;
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property Depth: TChartZPosition read FDepth write SetDepth default 0;
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property ExpandPercentage: Integer
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read FExpandPercentage write SetExpandPercentage default 0;
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@ -260,7 +255,7 @@ type
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property Foot: TChartTitle read FFoot write SetFoot;
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property Frame: TChartPen read FFrame write SetFrame;
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property GraphBrush: TBrush read FGraphBrush write SetGraphBrush;
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property LeftAxis: TChartAxis read FLeftAxis write SetLeftAxis;
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property LeftAxis: TChartAxis index 2 read GetAxis write SetAxis;
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property Legend: TChartLegend read FLegend write SetLegend;
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property Margins: TChartMargins read FMargins write SetMargins;
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property ReticuleMode: TReticuleMode
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@ -349,7 +344,7 @@ begin
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FReticulePos := Point(-1, -1);
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FReticuleMode := rmNone;
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FSeries := TChartSeriesList.Create(Self);
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FSeries := TChartSeriesList.Create;
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Color := clBtnFace;
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FBackColor := clBtnFace;
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@ -368,12 +363,17 @@ begin
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FTitle.Text.Add('TAChart');
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FFoot := TChartTitle.Create(Self);
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FLeftAxis := TChartAxis.Create(Self);
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FLeftAxis.Title.Angle := 90;
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FLeftAxis.Grid.Style := psDot;
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FBottomAxis := TChartAxis.Create(Self);
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FBottomAxis.Title.Angle := 0;
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FBottomAxis.Grid.Style := psDot;
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FAxisList := TChartAxisList.Create(Self);
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with TChartAxis.Create(FAxisList) do begin
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Alignment := calLeft;
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Title.Angle := 90;
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Grid.Style := psDot;
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end;
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with TChartAxis.Create(FAxisList) do begin
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Alignment := calBottom;
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Title.Angle := 0;
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Grid.Style := psDot;
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end;
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FFrame := TChartPen.Create;
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FFrame.OnChange := @StyleChanged;
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@ -390,8 +390,7 @@ begin
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FLegend.Free;
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FTitle.Free;
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FFoot.Free;
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FLeftAxis.Free;
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FBottomAxis.Free;
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FAxisList.Free;
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FFrame.Free;
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FExtent.Free;
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FMargins.Free;
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@ -414,6 +413,11 @@ begin
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Unused(DC);
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end;
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function TChart.GetAxis(AIndex: integer): TChartAxis;
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begin
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Result := FAxisList.GetAxis(AIndex);
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end;
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procedure TChart.StyleChanged(Sender: TObject);
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begin
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Invalidate;
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@ -462,7 +466,7 @@ type
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TConvFunc = function (AX: Integer): Double of object;
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procedure CalcOneCoord(
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AInverted: boolean; AConv: TConvFunc; var AGraphMin, AGraphMax: Double;
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AAxis: TChartAxis; AConv: TConvFunc; var AGraphMin, AGraphMax: Double;
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AImageLo, AImageHi, AMarginLo, AMarginHi, ASign: Integer;
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out AScale, AOffset: Double);
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var
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@ -477,24 +481,24 @@ type
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exit;
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end;
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if AInverted then
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if (AAxis <> nil) and AAxis.Inverted then
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Exchange(lo, hi);
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AScale := (hi - lo) / (AGraphMax - AGraphMin);
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AOffset := hi - AScale * AGraphMax;
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AGraphMin := AConv(AImageLo);
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AGraphMax := AConv(AImageHi);;
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if AInverted then
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if (AAxis <> nil) and AAxis.Inverted then
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Exchange(AGraphMin, AGraphMax);
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end;
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begin
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CalcOneCoord(
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BottomAxis.Inverted, @XImageToGraph, FCurrentExtent.a.X, FCurrentExtent.b.X,
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BottomAxis, @XImageToGraph, FCurrentExtent.a.X, FCurrentExtent.b.X,
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FClipRect.Left, FClipRect.Right, AMargin.Left, -AMargin.Right, 1,
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FScale.X, FOffset.X);
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CalcOneCoord(
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LeftAxis.Inverted, @YImageToGraph, FCurrentExtent.a.Y, FCurrentExtent.b.Y,
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LeftAxis, @YImageToGraph, FCurrentExtent.a.Y, FCurrentExtent.b.Y,
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FClipRect.Bottom, FClipRect.Top, -AMargin.Bottom, AMargin.Top, -1,
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FScale.Y, FOffset.Y);
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end;
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@ -586,22 +590,27 @@ var
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begin
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// FIXME: Angle assumed to be around 0 for bottom and 90 for left axis.
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c := CenterPoint(FClipRect);
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s := FLeftAxis.Title.Caption;
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if FLeftAxis.Visible and (s <> '') then begin
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w := ACanvas.TextHeight(FLeftAxis.Title.Caption);
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if LeftAxis <> nil then begin
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s := LeftAxis.Title.Caption;
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if LeftAxis.Visible and (s <> '') then begin
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w := ACanvas.TextHeight(LeftAxis.Title.Caption);
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x := FClipRect.Left;
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leftOffset := w + 4;
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ACanvas.Font.Orientation := FLeftAxis.Title.Angle * DEGREES_TO_ORIENT;
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ACanvas.Font.Orientation := LeftAxis.Title.Angle * DEGREES_TO_ORIENT;
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ACanvas.TextOut(x, c.Y - w div 2, s);
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end;
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end;
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s := FBottomAxis.Title.Caption;
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if FBottomAxis.Visible and (s <> '') then begin
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if BottomAxis <> nil then begin
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s := BottomAxis.Title.Caption;
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if BottomAxis.Visible and (s <> '') then begin
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sz := ACanvas.TextExtent(s);
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ACanvas.Font.Orientation := FBottomAxis.Title.Angle * DEGREES_TO_ORIENT;
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ACanvas.Font.Orientation := BottomAxis.Title.Angle * DEGREES_TO_ORIENT;
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ACanvas.TextOut(c.X - sz.cx div 2, FClipRect.Bottom - sz.cy, s);
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bottomOffset := sz.cy + 4;
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end;
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end;
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ACanvas.Font.Orientation := 0;
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end;
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@ -612,8 +621,8 @@ var
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begin
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x := XGraphToImage(AMark);
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if FBottomAxis.Grid.Visible then begin
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ACanvas.Pen.Assign(FBottomAxis.Grid);
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if BottomAxis.Grid.Visible then begin
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ACanvas.Pen.Assign(BottomAxis.Grid);
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ACanvas.Brush.Style := bsClear;
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DrawLineVert(ACanvas, x);
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end;
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@ -639,8 +648,8 @@ var
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begin
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y := YGraphToImage(AMark);
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if FLeftAxis.Grid.Visible then begin
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ACanvas.Pen.Assign(FLeftAxis.Grid);
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if LeftAxis.Grid.Visible then begin
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ACanvas.Pen.Assign(LeftAxis.Grid);
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ACanvas.Brush.Style := bsClear;
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DrawLineHoriz(ACanvas, y);
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end;
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@ -675,11 +684,11 @@ begin
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DrawAxisTitles;
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// Check AxisScale for both axes
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leftAxisScale := INV_TO_SCALE[LeftAxis.Inverted];
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bottomAxisScale := INV_TO_SCALE[BottomAxis.Inverted];
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leftAxisScale := INV_TO_SCALE[(LeftAxis <> nil) and LeftAxis.Inverted];
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bottomAxisScale := INV_TO_SCALE[(BottomAxis <> nil) and BottomAxis.Inverted];
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leftAxisWidth := 0;
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if FLeftAxis.Visible then begin
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if (LeftAxis <> nil) and LeftAxis.Visible then begin
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// Find max mark width
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maxWidth := 0;
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if YGraphMin <> YGraphMax then begin
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@ -710,7 +719,7 @@ begin
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leftOffset += leftAxisWidth;
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end;
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if FBottomAxis.Visible then
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if (BottomAxis <> nil) and BottomAxis.Visible then
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bottomOffset += ACanvas.TextHeight('0') + 5;
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FClipRect.Left += Max(leftOffset, Depth);
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@ -730,7 +739,7 @@ begin
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end;
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// X graduations
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if FBottomAxis.Visible and (XGraphMin <> XGraphMax) then begin
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if (BottomAxis <> nil) and BottomAxis.Visible and (XGraphMin <> XGraphMax) then begin
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CalculateIntervals(XGraphMin, XGraphMax, bottomAxisScale, mark, step);
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case bottomAxisScale of
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asIncreasing:
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@ -749,7 +758,7 @@ begin
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end;
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// Y graduations
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if FLeftAxis.Visible and (YGraphMin <> YGraphMax) then begin
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if (LeftAxis <> nil) and LeftAxis.Visible and (YGraphMin <> YGraphMax) then begin
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CalculateIntervals(YGraphMin, YGraphMax, leftAxisScale, mark, step);
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case leftAxisScale of
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asIncreasing:
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@ -1032,6 +1041,12 @@ begin
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end;
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end;
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procedure TChart.SetAxis(AIndex: Integer; AValue: TChartAxis);
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begin
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FAxisList.SetAxis(AIndex, AValue);
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Invalidate;
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end;
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procedure TChart.SetAxisColor(const AValue: TColor);
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begin
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if FAxisColor = AValue then exit;
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@ -1220,18 +1235,6 @@ begin
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Invalidate;
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end;
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procedure TChart.SetLeftAxis(Value: TChartAxis);
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begin
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FLeftAxis.Assign(Value);
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Invalidate;
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end;
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procedure TChart.SetBottomAxis(Value: TChartAxis);
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begin
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FBottomAxis.Assign(Value);
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Invalidate;
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end;
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procedure TChart.SetMargins(AValue: TChartMargins);
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begin
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FMargins.Assign(AValue);
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@ -1454,9 +1457,8 @@ begin
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Result := FList.Count;
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end;
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constructor TChartSeriesList.Create(AOwner: TChart);
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constructor TChartSeriesList.Create;
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begin
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FChart := AOwner;
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FList := TFPList.Create;
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end;
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@ -1477,12 +1479,6 @@ begin
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Result := TBasicChartSeries(FList.Items[AIndex]);
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end;
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procedure TChartSeriesList.SetItem(
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AIndex: Integer; const AValue: TBasicChartSeries);
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begin
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GetItem(AIndex).Assign(AValue);
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end;
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procedure SkipObsoleteChartProperties;
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const
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MIRRORX_NOTE = 'Obsolete, use BottomAxis.Invert instead';
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@ -64,9 +64,9 @@ type
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procedure SetVisible(const AValue: Boolean);
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protected
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FOwner: TCustomChart;
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procedure StyleChanged(Sender: TObject);
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procedure InitHelper(
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var AResult: TFPCanvasHelper; AClass: TFPCanvasHelperClass);
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procedure StyleChanged(Sender: TObject);
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public
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constructor Create(AOwner: TCustomChart);
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procedure Assign(Source: TPersistent); override;
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@ -147,26 +147,57 @@ type
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property Visible default false;
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end;
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TChartAxis = class(TChartElement)
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TChartAxisAlignment = (calLeft, calTop, calRight, calBottom);
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{ TChartAxis }
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TChartAxis = class(TCollectionItem)
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private
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FAlignment: TChartAxisAlignment;
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FGrid: TChartPen;
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FInverted: Boolean;
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FTitle: TChartAxisTitle;
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FVisible: Boolean;
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procedure SetAlignment(AValue: TChartAxisAlignment);
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procedure SetGrid(AValue: TChartPen);
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procedure SetInverted(AValue: Boolean);
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procedure SetTitle(AValue: TChartAxisTitle);
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procedure SetVisible(const AValue: Boolean);
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procedure StyleChanged(ASender: TObject);
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public
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constructor Create(AOwner: TCustomChart);
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constructor Create(ACollection: TCollection); override;
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destructor Destroy; override;
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procedure Assign(Source: TPersistent); override;
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published
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property Alignment: TChartAxisAlignment read FAlignment write SetAlignment;
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property Grid: TChartPen read FGrid write SetGrid;
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// Inverts the axis scale from increasing to decreasing.
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property Inverted: boolean read FInverted write SetInverted default false;
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property Title: TChartAxisTitle read FTitle write SetTitle;
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property Visible default true;
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property Visible: Boolean read FVisible write SetVisible default true;
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end;
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{ TChartAxisList }
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TChartAxisList = class(TCollection)
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private
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FChart: TCustomChart;
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function GetAxes(AIndex: Integer): TChartAxis;
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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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function Add: TChartAxis; inline;
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function GetAxis(AIndex: Integer): TChartAxis;
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procedure SetAxis(AIndex: Integer; AValue: TChartAxis);
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property Axes[AIndex: Integer]: TChartAxis read GetAxes; default;
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property BottomAxis: TChartAxis index 1 read GetAxis write SetAxis;
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property LeftAxis: TChartAxis index 2 read GetAxis write SetAxis;
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end;
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TChartLinkPen = class(TChartPen)
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@ -333,7 +364,7 @@ end;
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procedure TChartElement.Assign(Source: TPersistent);
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begin
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inherited Assign(Source);
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//inherited Assign(Source);
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if Source is TChartElement then
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Self.FVisible := TChartElement(Source).FVisible;
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end;
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@ -542,14 +573,15 @@ begin
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FInverted := Inverted;
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FTitle.Assign(Title);
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end;
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inherited Assign(Source);
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//inherited Assign(Source);
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end;
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constructor TChartAxis.Create(AOwner: TCustomChart);
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constructor TChartAxis.Create(ACollection: TCollection);
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begin
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inherited Create(AOwner);
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FTitle := TChartAxisTitle.Create(AOwner);
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InitHelper(FGrid, TChartPen);
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inherited Create(ACollection);
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FTitle := TChartAxisTitle.Create(ACollection.Owner as TCustomChart);
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FGrid := TChartPen.Create;
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FGrid.OnChange := @StyleChanged;
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FVisible := true;
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end;
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@ -560,6 +592,13 @@ begin
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inherited;
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end;
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procedure TChartAxis.SetAlignment(AValue: TChartAxisAlignment);
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begin
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if FAlignment = AValue then exit;
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FAlignment := AValue;
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StyleChanged(Self);
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end;
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procedure TChartAxis.SetGrid(AValue: TChartPen);
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begin
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FGrid.Assign(AValue);
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@ -578,6 +617,19 @@ begin
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StyleChanged(Self);
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end;
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procedure TChartAxis.SetVisible(const 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 TChartAxis.StyleChanged(ASender: TObject);
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begin
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Unused(ASender);
|
||||
(Collection.Owner as TCustomChart).Invalidate;
|
||||
end;
|
||||
|
||||
{ TChartMarks }
|
||||
|
||||
procedure TChartMarks.Assign(Source: TPersistent);
|
||||
@ -882,5 +934,52 @@ begin
|
||||
StyleChanged(Self);
|
||||
end;
|
||||
|
||||
const
|
||||
AXIS_INDEX: array [1..2] of TChartAxisAlignment = (calBottom, calLeft);
|
||||
|
||||
{ TChartAxisList }
|
||||
|
||||
function TChartAxisList.Add: TChartAxis; inline;
|
||||
begin
|
||||
Result := TChartAxis(inherited Add);
|
||||
end;
|
||||
|
||||
constructor TChartAxisList.Create(AOwner: TCustomChart);
|
||||
begin
|
||||
inherited Create(TChartAxis);
|
||||
FChart := AOwner;
|
||||
end;
|
||||
|
||||
function TChartAxisList.GetAxes(AIndex: Integer): TChartAxis;
|
||||
begin
|
||||
Result := TChartAxis(Items[AIndex]);
|
||||
end;
|
||||
|
||||
function TChartAxisList.GetAxis(AIndex: Integer): TChartAxis;
|
||||
var
|
||||
i: Integer;
|
||||
begin
|
||||
for i := 0 to Count - 1 do
|
||||
if Axes[i].Alignment = AXIS_INDEX[AIndex] then
|
||||
exit(Axes[i]);
|
||||
Result := nil;
|
||||
end;
|
||||
|
||||
function TChartAxisList.GetOwner: TPersistent;
|
||||
begin
|
||||
Result := FChart;
|
||||
end;
|
||||
|
||||
procedure TChartAxisList.SetAxis(AIndex: Integer; AValue: TChartAxis);
|
||||
var
|
||||
a: TChartAxis;
|
||||
begin
|
||||
a := GetAxis(AIndex);
|
||||
if a = nil then
|
||||
a := Add;
|
||||
a.Assign(AValue);
|
||||
a.FAlignment := AXIS_INDEX[AIndex];
|
||||
end;
|
||||
|
||||
end.
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user