TAChart: Add "slice scaling" page to the "bgra" demo

git-svn-id: trunk@40080 -
2025-08-19 18:59:10 +02:00 · 2013-01-31 04:35:25 +00:00 · 2013-01-31 04:35:25 +00:00 · 115f0340d0
commit 115f0340d0
parent 96b4a2c072
2 changed files with 453 additions and 118 deletions
--- a/components/tachart/demo/bgra/Main.lfm
+++ b/components/tachart/demo/bgra/Main.lfm
@ -1,110 +1,331 @@
 object Form1: TForm1
-  Left = 1036
-  Height = 459
-  Top = 154
-  Width = 620
+  Left = 402
+  Height = 481
+  Top = 136
+  Width = 720
  Caption = 'Form1'
-  ClientHeight = 459
-  ClientWidth = 620
+  ClientHeight = 481
+  ClientWidth = 720
+  OnCreate = FormCreate
+  OnDestroy = FormDestroy
  Position = poScreenCenter
  LCLVersion = '1.1'
-  object Chart1: TChart
-    Left = 0
-    Height = 425
-    Top = 0
-    Width = 308
-    AntialiasingMode = amOff
-    AxisList = <    
-      item
-        Marks.LabelFont.Height = 13
-        Marks.LabelFont.Orientation = 400
-        Minors = <>
-        Title.LabelFont.Orientation = 900
-      end    
-      item
-        Alignment = calBottom
-        Marks.LabelFont.Height = 13
-        Minors = <>
-      end>
-    BackColor = clMoneyGreen
-    Foot.Brush.Color = clBtnFace
-    Foot.Font.Color = clBlue
-    Title.Brush.Color = clBtnFace
-    Title.Brush.Style = bsClear
-    Title.Font.Color = clBlue
-    Title.Font.Height = -16
-    Title.Text.Strings = (
-      'Standard'
-    )
-    Title.Visible = True
-    OnAfterPaint = Chart1AfterPaint
-    Align = alLeft
-    Color = clGreen
-    ParentColor = False
-    object Chart1LineSeries1: TLineSeries
-      ZPosition = 10
-      LinePen.Color = clMaroon
-      LinePen.Style = psDot
-      LinePen.Width = 8
-      Source = RandomChartSource1
-    end
-    object Chart1BarSeries1: TBarSeries
-      Transparency = 60
-      BarBrush.Color = 3059701
-      Source = RandomChartSource1
-    end
-    object Chart1PieSeries1: TPieSeries
-      Transparency = 128
-      Active = False
-      Source = RandomChartSource1
-    end
-    object Chart1AreaSeries1: TAreaSeries
-      ZPosition = 9
-      AreaBrush.Color = clRed
-      AreaBrush.Style = bsDiagCross
-      Source = RandomChartSource1
-    end
-  end
-  object PaintBox1: TPaintBox
-    Left = 312
-    Height = 425
-    Top = 0
-    Width = 308
-    Align = alClient
-    OnPaint = PaintBox1Paint
-  end
  object Splitter1: TSplitter
-    Left = 308
-    Height = 425
+    Left = 0
+    Height = 481
    Top = 0
    Width = 4
  end
-  object Panel1: TPanel
-    Left = 0
-    Height = 34
-    Top = 425
-    Width = 620
-    Align = alBottom
-    ClientHeight = 34
-    ClientWidth = 620
-    TabOrder = 2
-    object cbAntialiasing: TCheckBox
-      Left = 8
-      Height = 17
-      Top = 8
-      Width = 74
-      Caption = 'Antialiasing'
-      OnChange = cbAntialiasingChange
-      TabOrder = 0
+  object PageControl1: TPageControl
+    Left = 4
+    Height = 481
+    Top = 0
+    Width = 716
+    ActivePage = tsSimple
+    Align = alClient
+    TabIndex = 0
+    TabOrder = 1
+    object tsSimple: TTabSheet
+      Caption = 'Simple'
+      ClientHeight = 455
+      ClientWidth = 708
+      object Panel1: TPanel
+        Left = 0
+        Height = 34
+        Top = 421
+        Width = 708
+        Align = alBottom
+        ClientHeight = 34
+        ClientWidth = 708
+        TabOrder = 0
+        object cbAntialiasing: TCheckBox
+          Left = 8
+          Height = 17
+          Top = 8
+          Width = 74
+          Caption = 'Antialiasing'
+          OnChange = cbAntialiasingChange
+          TabOrder = 0
+        end
+        object cbPie: TCheckBox
+          Left = 104
+          Height = 17
+          Top = 7
+          Width = 34
+          Caption = 'Pie'
+          OnChange = cbPieChange
+          TabOrder = 1
+        end
+      end
+      object chSimple: TChart
+        Left = 0
+        Height = 421
+        Top = 0
+        Width = 354
+        AntialiasingMode = amOff
+        AxisList = <        
+          item
+            Marks.LabelFont.Height = 13
+            Marks.LabelFont.Orientation = 400
+            Minors = <>
+            Title.LabelFont.Orientation = 900
+          end        
+          item
+            Alignment = calBottom
+            Marks.LabelFont.Height = 13
+            Minors = <>
+          end>
+        BackColor = clMoneyGreen
+        Foot.Brush.Color = clBtnFace
+        Foot.Font.Color = clBlue
+        Title.Brush.Color = clBtnFace
+        Title.Brush.Style = bsClear
+        Title.Font.Color = clBlue
+        Title.Font.Height = -16
+        Title.Text.Strings = (
+          'Standard'
+        )
+        Title.Visible = True
+        OnAfterPaint = chSimpleAfterPaint
+        Align = alLeft
+        Color = clGreen
+        ParentColor = False
+        object chSimpleLineSeries1: TLineSeries
+          ZPosition = 10
+          LinePen.Color = clMaroon
+          LinePen.Style = psDot
+          LinePen.Width = 8
+          Source = RandomChartSource1
+        end
+        object chSimpleBarSeries1: TBarSeries
+          Transparency = 60
+          BarBrush.Color = 3059701
+          Source = RandomChartSource1
+        end
+        object chSimplePieSeries1: TPieSeries
+          Transparency = 128
+          Active = False
+          Source = RandomChartSource1
+        end
+        object chSimpleAreaSeries1: TAreaSeries
+          ZPosition = 9
+          AreaBrush.Color = clRed
+          AreaBrush.Style = bsDiagCross
+          Source = RandomChartSource1
+        end
+      end
+      object PaintBox1: TPaintBox
+        Left = 354
+        Height = 421
+        Top = 0
+        Width = 354
+        Align = alClient
+        OnPaint = PaintBox1Paint
+      end
    end
-    object cbPie: TCheckBox
-      Left = 104
-      Height = 17
-      Top = 7
-      Width = 34
-      Caption = 'Pie'
-      OnChange = cbPieChange
-      TabOrder = 1
+    object tsSliceScaling: TTabSheet
+      Caption = 'Slice scaling'
+      ClientHeight = 455
+      ClientWidth = 708
+      object Panel2: TPanel
+        Left = 586
+        Height = 455
+        Top = 0
+        Width = 122
+        Align = alRight
+        ClientHeight = 455
+        ClientWidth = 122
+        TabOrder = 0
+        object rgMethod: TRadioGroup
+          Left = 1
+          Height = 97
+          Top = 1
+          Width = 120
+          Align = alTop
+          AutoFill = True
+          Caption = ' Method '
+          ChildSizing.LeftRightSpacing = 6
+          ChildSizing.TopBottomSpacing = 6
+          ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+          ChildSizing.EnlargeVertical = crsHomogenousChildResize
+          ChildSizing.ShrinkHorizontal = crsScaleChilds
+          ChildSizing.ShrinkVertical = crsScaleChilds
+          ChildSizing.Layout = cclLeftToRightThenTopToBottom
+          ChildSizing.ControlsPerLine = 1
+          ClientHeight = 79
+          ClientWidth = 116
+          ItemIndex = 0
+          Items.Strings = (
+            'Grow'
+            'Add'
+            'Add then grow'
+          )
+          OnClick = rgMethodClick
+          TabOrder = 0
+        end
+        object btnStartStop: TButton
+          Left = 6
+          Height = 25
+          Top = 106
+          Width = 75
+          Caption = 'Start / stop'
+          OnClick = btnStartStopClick
+          TabOrder = 1
+        end
+        object lblSkipped: TLabel
+          Left = 9
+          Height = 1
+          Top = 340
+          Width = 1
+          ParentColor = False
+        end
+        object Image1: TImage
+          Left = 9
+          Height = 148
+          Top = 176
+          Width = 61
+          Picture.Data = {
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+          }
+          Proportional = True
+          Stretch = True
+          Visible = False
+        end
+      end
+      object chSliceScaling: TChart
+        Left = 0
+        Height = 455
+        Top = 0
+        Width = 586
+        AxisList = <        
+          item
+            Minors = <>
+            Title.LabelFont.Orientation = 900
+          end        
+          item
+            Alignment = calBottom
+            Minors = <>
+          end>
+        BackColor = clBlack
+        Foot.Brush.Color = clBtnFace
+        Foot.Font.Color = clBlue
+        Margins.Top = 40
+        Margins.Bottom = 0
+        Title.Brush.Color = clBtnFace
+        Title.Font.Color = clBlue
+        Title.Text.Strings = (
+          'TAChart'
+        )
+        Align = alClient
+        DoubleBuffered = True
+        ParentColor = False
+        object chSliceScalingBarSeries1: TBarSeries
+          BarBrush.Color = 2183646
+          BarBrush.Style = bsClear
+          BarPen.Style = psClear
+          OnBeforeDrawBar = chSliceScalingBarSeries1BeforeDrawBar
+        end
+      end
    end
  end
  object RandomChartSource1: TRandomChartSource
@ -117,4 +338,17 @@ object Form1: TForm1
    left = 189
    top = 263
  end
+  object ListChartSource1: TListChartSource
+    DataPoints.Strings = (
+      '1|2|?|'
+      '2|3|?|'
+      '3|5|?|'
+      '4|6|?|'
+      '5|9|?|'
+      '6|7|?|'
+      '7|8|?|'
+    )
+    left = 192
+    top = 320
+  end
 end
--- a/components/tachart/demo/bgra/Main.pas
+++ b/components/tachart/demo/bgra/Main.pas
@ -5,29 +5,57 @@ unit Main;
 interface

 uses
-  Classes, ExtCtrls, StdCtrls, SysUtils, FileUtil, Forms, Controls,
-  Graphics, Dialogs, TAGraph, TASeries, TASources;
+  Classes, ComCtrls, ExtCtrls, Spin, StdCtrls, SysUtils, FileUtil, Forms,
+  Controls, Graphics, Dialogs,
+  TAGraph, TASeries, TASources, TAAnimatedSource, TACustomSource,
+  BGRASliceScaling;

 type

  { TForm1 }

  TForm1 = class(TForm)
-    Chart1: TChart;
-    Chart1AreaSeries1: TAreaSeries;
-    Chart1BarSeries1: TBarSeries;
-    Chart1LineSeries1: TLineSeries;
-    Chart1PieSeries1: TPieSeries;
+    btnStartStop: TButton;
    cbAntialiasing: TCheckBox;
    cbPie: TCheckBox;
+    chSimple: TChart;
+    chSimpleAreaSeries1: TAreaSeries;
+    chSimpleBarSeries1: TBarSeries;
+    chSimpleLineSeries1: TLineSeries;
+    chSimplePieSeries1: TPieSeries;
+    chSliceScaling: TChart;
+    chSliceScalingBarSeries1: TBarSeries;
+    Image1: TImage;
+    lblSkipped: TLabel;
+    ListChartSource1: TListChartSource;
+    PageControl1: TPageControl;
    PaintBox1: TPaintBox;
    Panel1: TPanel;
+    Panel2: TPanel;
    RandomChartSource1: TRandomChartSource;
+    rgMethod: TRadioGroup;
    Splitter1: TSplitter;
+    tsSimple: TTabSheet;
+    tsSliceScaling: TTabSheet;
+    procedure btnStartStopClick(Sender: TObject);
    procedure cbAntialiasingChange(Sender: TObject);
    procedure cbPieChange(Sender: TObject);
-    procedure Chart1AfterPaint(ASender: TChart);
+    procedure chSimpleAfterPaint(ASender: TChart);
+    procedure chSliceScalingBarSeries1BeforeDrawBar(ASender: TBarSeries;
+      ACanvas: TCanvas; const ARect: TRect; APointIndex, AStackIndex: Integer;
+      var ADoDefaultDrawing: Boolean);
+    procedure FormCreate(Sender: TObject);
+    procedure FormDestroy(Sender: TObject);
    procedure PaintBox1Paint(Sender: TObject);
+    procedure rgMethodClick(Sender: TObject);
+  private
+    FAnimatedSource: TCustomAnimatedChartSource;
+    procedure OnGetItem(
+      ASource: TCustomAnimatedChartSource;
+      AIndex: Integer; var AItem: TChartDataItem);
+    procedure OnStop(ASource: TCustomAnimatedChartSource);
+  public
+    sliceScaling: TBGRASliceScaling;
  end;

 var
@ -38,29 +66,75 @@ implementation
 {$R *.lfm}

 uses
-  BGRABitmap, TAChartUtils, TADrawerBGRA, TADrawerCanvas, TADrawUtils;
+  Math, BGRABitmap, BGRABitmapTypes,
+  TAChartUtils, TADrawerBGRA, TADrawerCanvas, TADrawUtils, TAGeometry;

 { TForm1 }

+procedure TForm1.btnStartStopClick(Sender: TObject);
+begin
+  if FAnimatedSource.IsAnimating then
+    FAnimatedSource.Stop
+  else
+    FAnimatedSource.Start;
+end;
+
 procedure TForm1.cbAntialiasingChange(Sender: TObject);
 begin
  if cbAntialiasing.Checked then
-    Chart1.AntialiasingMode := amOn
+    chSimple.AntialiasingMode := amOn
  else
-    Chart1.AntialiasingMode := amOff;
+    chSimple.AntialiasingMode := amOff;
 end;

 procedure TForm1.cbPieChange(Sender: TObject);
 begin
-  Chart1PieSeries1.Active := cbPie.Checked;
+  chSimplePieSeries1.Active := cbPie.Checked;
 end;

-procedure TForm1.Chart1AfterPaint(ASender: TChart);
+procedure TForm1.chSimpleAfterPaint(ASender: TChart);
 begin
  Unused(ASender);
  PaintBox1.Invalidate;
 end;

+procedure TForm1.chSliceScalingBarSeries1BeforeDrawBar(ASender: TBarSeries;
+  ACanvas: TCanvas; const ARect: TRect; APointIndex, AStackIndex: Integer;
+  var ADoDefaultDrawing: Boolean);
+var
+  temp: TBGRABitmap;
+  sz: TPoint;
+begin
+  sz := ARect.BottomRight - ARect.TopLeft;
+  temp := TBGRABitmap.Create(
+    sliceScaling.BitmapWidth, Round(sliceScaling.BitmapWidth * sz.Y / sz.X));
+  try
+    sliceScaling.Draw(temp, 0, 0, temp.Width, temp.Height);
+    temp.Draw(ACanvas, ARect);
+  finally
+    temp.Free;
+  end;
+end;
+
+procedure TForm1.FormCreate(Sender: TObject);
+begin
+  FAnimatedSource := TCustomAnimatedChartSource.Create(Self);
+  FAnimatedSource.Origin := ListChartSource1;
+  FAnimatedSource.AnimationInterval := 30;
+  FAnimatedSource.AnimationTime := 1000;
+  FAnimatedSource.OnGetItem := @OnGetItem;
+  FAnimatedSource.OnStop := @OnStop;
+  chSliceScalingBarSeries1.Source := FAnimatedSource;
+
+  sliceScaling := TBGRASliceScaling.Create(Image1.Picture.Bitmap, 70, 0, 35, 0);
+  sliceScaling.AutodetectRepeat;
+end;
+
+procedure TForm1.FormDestroy(Sender: TObject);
+begin
+  sliceScaling.Free;
+end;
+
 procedure TForm1.PaintBox1Paint(Sender: TObject);
 var
  bmp: TBGRABitmap;
@ -68,21 +142,48 @@ var
  rp: TChartRenderingParams;
 begin
  bmp := TBGRABitmap.Create(PaintBox1.Width, PaintBox1.Height);
-  Chart1.DisableRedrawing;
+  chSimple.DisableRedrawing;
  try
-    Chart1.Title.Text.Text := 'BGRABitmap';
+    chSimple.Title.Text.Text := 'BGRABitmap';
    id := TBGRABitmapDrawer.Create(bmp);
    id.DoGetFontOrientation := @CanvasGetFontOrientationFunc;
-    rp := Chart1.RenderingParams;
-    Chart1.Draw(id, Rect(0, 0, PaintBox1.Width, PaintBox1.Height));
-    Chart1.RenderingParams := rp;
+    rp := chSimple.RenderingParams;
+    chSimple.Draw(id, Rect(0, 0, PaintBox1.Width, PaintBox1.Height));
+    chSimple.RenderingParams := rp;
    bmp.Draw(PaintBox1.Canvas, 0, 0);
-    Chart1.Title.Text.Text := 'Standard';
+    chSimple.Title.Text.Text := 'Standard';
  finally
-    Chart1.EnableRedrawing;
+    chSimple.EnableRedrawing;
    bmp.Free;
  end;
 end;

+procedure TForm1.OnGetItem(
+  ASource: TCustomAnimatedChartSource;
+  AIndex: Integer; var AItem: TChartDataItem);
+begin
+  case rgMethod.ItemIndex of
+  0: AItem.Y *= ASource.Progress;
+  1:
+    if ASource.Count * ASource.Progress < AIndex then
+      AItem.Y := 0;
+  2:
+    case Sign(Trunc(ASource.Count * ASource.Progress) - AIndex) of
+      0: AItem.Y *= Frac(ASource.Count * ASource.Progress);
+      -1: AItem.Y := 0;
+    end;
+  end;
+end;
+
+procedure TForm1.OnStop(ASource: TCustomAnimatedChartSource);
+begin
+  lblSkipped.Caption := Format('Skipped frames: %d', [ASource.SkippedFramesCount]);
+end;
+
+procedure TForm1.rgMethodClick(Sender: TObject);
+begin
+  FAnimatedSource.Start;
+end;
+
 end.