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TAChart: Add Chart.RenderingParams property

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git-svn-id: trunk@30199 -
This commit is contained in:
ask 2011-04-05 17:15:24 +00:00
parent c6bdd569fa
commit eda3f30176
1 changed files with 35 additions and 17 deletions
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52
components/tachart/tagraph.pas
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@ -141,6 +141,13 @@ type
ASender: TChart; const ARect: TRect; ASender: TChart; const ARect: TRect;
var ADoDefaultDrawing: Boolean) of object; var ADoDefaultDrawing: Boolean) of object;
TChartRenderingParams = record
FClipRect: TRect;
FIsZoomed: Boolean;
FLogicalExtent, FPrevLogicalExtent: TDoubleRect;
FScale, FOffset: TDoublePoint;
end;
{ TChart } { TChart }
TChart = class(TCustomChart, ICoordTransformer) TChart = class(TCustomChart, ICoordTransformer)
@ -195,6 +202,7 @@ type
function GetChartHeight: Integer; function GetChartHeight: Integer;
function GetChartWidth: Integer; function GetChartWidth: Integer;
function GetMargins(ADrawer: IChartDrawer): TRect; function GetMargins(ADrawer: IChartDrawer): TRect;
function GetRenderingParams: TChartRenderingParams;
function GetSeriesCount: Integer; function GetSeriesCount: Integer;
function GetToolset: TBasicChartToolset; function GetToolset: TBasicChartToolset;
procedure HideReticule; procedure HideReticule;
@ -219,6 +227,7 @@ type
procedure SetOnChartPaint(AValue: TChartPaintEvent); procedure SetOnChartPaint(AValue: TChartPaintEvent);
procedure SetOnDrawReticule(AValue: TDrawReticuleEvent); procedure SetOnDrawReticule(AValue: TDrawReticuleEvent);
procedure SetProportional(AValue: Boolean); procedure SetProportional(AValue: Boolean);
procedure SetRenderingParams(AValue: TChartRenderingParams);
procedure SetReticuleMode(const AValue: TReticuleMode); procedure SetReticuleMode(const AValue: TReticuleMode);
procedure SetReticulePos(const AValue: TPoint); procedure SetReticulePos(const AValue: TPoint);
procedure SetTitle(Value: TChartTitle); procedure SetTitle(Value: TChartTitle);
@ -274,6 +283,9 @@ type
function SaveToImage(AClass: TRasterImageClass): TRasterImage; function SaveToImage(AClass: TRasterImageClass): TRasterImage;
procedure StyleChanged(Sender: TObject); override; procedure StyleChanged(Sender: TObject); override;
procedure ZoomFull; override; procedure ZoomFull; override;
public
property RenderingParams: TChartRenderingParams
read GetRenderingParams write SetRenderingParams;
public // Coordinate conversion public // Coordinate conversion
function GraphToImage(const AGraphPoint: TDoublePoint): TPoint; function GraphToImage(const AGraphPoint: TDoublePoint): TPoint;
function ImageToGraph(const APoint: TPoint): TDoublePoint; function ImageToGraph(const APoint: TPoint): TDoublePoint;
@ -914,6 +926,16 @@ begin
a[i] := ADrawer.Scale(a[i]); a[i] := ADrawer.Scale(a[i]);
end; end;
function TChart.GetRenderingParams: TChartRenderingParams;
begin
Result.FScale := FScale;
Result.FOffset := FOffset;
Result.FClipRect := FClipRect;
Result.FLogicalExtent := FLogicalExtent;
Result.FPrevLogicalExtent := FPrevLogicalExtent;
Result.FIsZoomed := FIsZoomed;
end;
function TChart.GetSeriesCount: Integer; function TChart.GetSeriesCount: Integer;
begin begin
Result := FSeries.FList.Count; Result := FSeries.FList.Count;
@ -987,29 +1009,15 @@ end;
procedure TChart.PaintOnAuxCanvas(ACanvas: TCanvas; ARect: TRect); procedure TChart.PaintOnAuxCanvas(ACanvas: TCanvas; ARect: TRect);
var var
oldScale, oldOffset: TDoublePoint; rp: TChartRenderingParams;
oldClipRect: TRect;
oldLogicalExtent, oldPrevLogicalExtent: TDoubleRect;
oldIsZoomed: Boolean;
begin begin
// TODO: Group rendering params into a structure. rp := RenderingParams;
oldScale := FScale;
oldOffset := FOffset;
oldClipRect := FClipRect;
oldLogicalExtent := FLogicalExtent;
oldPrevLogicalExtent := FPrevLogicalExtent;
oldIsZoomed := FIsZoomed;
ExtentBroadcaster.Locked := true; ExtentBroadcaster.Locked := true;
try try
FIsZoomed := false; FIsZoomed := false;
PaintOnCanvas(ACanvas, ARect); PaintOnCanvas(ACanvas, ARect);
finally finally
FScale := oldScale; RenderingParams := rp;
FOffset := oldOffset;
FClipRect := oldClipRect;
FLogicalExtent := oldLogicalExtent;
FPrevLogicalExtent := oldPrevLogicalExtent;
FIsZoomed := oldIsZoomed;
ExtentBroadcaster.Locked := false; ExtentBroadcaster.Locked := false;
end; end;
end; end;
@ -1244,6 +1252,16 @@ begin
Invalidate; Invalidate;
end; end;
procedure TChart.SetRenderingParams(AValue: TChartRenderingParams);
begin
FScale := AValue.FScale;
FOffset := AValue.FOffset;
FClipRect := AValue.FClipRect;
FLogicalExtent := AValue.FLogicalExtent;
FPrevLogicalExtent := AValue.FPrevLogicalExtent;
FIsZoomed := AValue.FIsZoomed;
end;
procedure TChart.SetReticuleMode(const AValue: TReticuleMode); procedure TChart.SetReticuleMode(const AValue: TReticuleMode);
begin begin
if FReticuleMode = AValue then exit; if FReticuleMode = AValue then exit;