TAChart: Add demo for TUserDrawnSeries

git-svn-id: trunk@57283 -

.gitattributes

@@ -4933,6 +4933,10 @@ components/tachart/demo/tools/main.lfm svneol=native#text/plain
 components/tachart/demo/tools/main.pas svneol=native#text/pascal
 components/tachart/demo/tools/toolsdemo.lpi svneol=native#text/plain
 components/tachart/demo/tools/toolsdemo.lpr svneol=native#text/pascal
+components/tachart/demo/userdrawn_series/main.lfm svneol=native#text/plain
+components/tachart/demo/userdrawn_series/main.pas svneol=native#text/plain
+components/tachart/demo/userdrawn_series/userdrawn_demo.lpi svneol=native#text/plain
+components/tachart/demo/userdrawn_series/userdrawn_demo.lpr svneol=native#text/plain
 components/tachart/demo/wmf/main.lfm svneol=native#text/plain
 components/tachart/demo/wmf/main.pas svneol=native#text/pascal
 components/tachart/demo/wmf/wmfdemo.lpi svneol=native#text/plain

components/tachart/demo/userdrawn_series/main.lfm

@@ -0,0 +1,89 @@
+object MainForm: TMainForm
+  Left = 303
+  Height = 420
+  Top = 127
+  Width = 595
+  Caption = 'Userdrawn series demo'
+  ClientHeight = 420
+  ClientWidth = 595
+  OnCreate = FormCreate
+  OnDestroy = FormDestroy
+  LCLVersion = '1.9.0.0'
+  object Chart: TChart
+    Left = 0
+    Height = 386
+    Top = 0
+    Width = 595
+    AxisList = <    
+      item
+        Grid.Visible = False
+        Marks.LabelBrush.Style = bsClear
+        Minors = <>
+        Title.LabelFont.Orientation = 900
+        Title.LabelBrush.Style = bsClear
+      end    
+      item
+        Grid.Visible = False
+        Alignment = calBottom
+        Marks.LabelBrush.Style = bsClear
+        Minors = <>
+        Title.LabelBrush.Style = bsClear
+      end>
+    BackColor = clWhite
+    Foot.Brush.Color = clBtnFace
+    Foot.Font.Color = clBlue
+    Foot.Text.Strings = (
+      'Drag the horizontal line up and down.'
+    )
+    Foot.Visible = True
+    Margins.Left = 8
+    Margins.Top = 8
+    Margins.Right = 8
+    Margins.Bottom = 8
+    Title.Brush.Color = clBtnFace
+    Title.Font.Color = clBlue
+    Title.Text.Strings = (
+      'TAChart'
+    )
+    Toolset = ChartToolset
+    Align = alClient
+    object ReferenceLine: TConstantLine
+      Pen.Color = clBlue
+      Pen.Style = psDash
+      Position = 4
+    end
+    object Series: TUserDrawnSeries
+      OnDraw = SeriesDraw
+      OnGetBounds = SeriesGetBounds
+    end
+  end
+  object Panel: TPanel
+    Left = 0
+    Height = 34
+    Top = 386
+    Width = 595
+    Align = alBottom
+    BevelOuter = bvNone
+    ClientHeight = 34
+    ClientWidth = 595
+    TabOrder = 1
+    object cbShowDataPoints: TCheckBox
+      Left = 11
+      Height = 19
+      Top = 8
+      Width = 111
+      Caption = 'Show data points'
+      OnChange = cbShowDataPointsChange
+      TabOrder = 0
+    end
+  end
+  object ChartToolset: TChartToolset
+    left = 173
+    top = 119
+    object DataPointDragTool: TDataPointDragTool
+      Shift = [ssLeft]
+      AffectedSeries = '0'
+      ActiveCursor = crSizeNS
+    end
+  end
+end

components/tachart/demo/userdrawn_series/main.pas

@@ -0,0 +1,173 @@
+unit main;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, Forms, Controls, Graphics, Dialogs, ExtCtrls, StdCtrls,
+  TAGraph, TASeries, TAChartUtils, TATools, Types;
+
+type
+
+  { TMainForm }
+
+  TMainForm = class(TForm)
+    Chart: TChart;
+    ReferenceLine: TConstantLine;
+    Series: TUserDrawnSeries;
+    ChartToolset: TChartToolset;
+    DataPointDragTool: TDataPointDragTool;
+    cbShowDataPoints: TCheckBox;
+    Panel: TPanel;
+    procedure SeriesDraw(ACanvas: TCanvas; const ARect: TRect);
+    procedure SeriesGetBounds(var ABounds: TDoubleRect);
+    procedure cbShowDataPointsChange(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormDestroy(Sender: TObject);
+  private
+    Pen: TPen;
+
+  public
+
+  end;
+
+var
+  MainForm: TMainForm;
+
+implementation
+
+{$R *.lfm}
+
+uses
+  Math, TAGeometry;
+
+const
+  COLOR_ABOVE = clRed;
+  COLOR_BELOW = clGreen;
+  RADIUS = 4;
+
+type
+  TDataRec = record
+    x, y: Double;
+  end;
+
+var
+  Data: array of TDataRec;
+  Extent: TDoubleRect;
+
+function Intersect(p1, p2: TPoint; y: Integer): Integer;
+begin
+  if p1.x = p2.x then
+    Result := p1.x
+  else
+    Result := round((p2.x - p1.x) / (p2.y - p1.y) * (y - p1.y) + p1.x);
+end;
+
+
+{ TMainForm }
+
+procedure TMainForm.SeriesDraw(ACanvas: TCanvas;
+  const ARect: TRect);
+
+  procedure DrawCircle(p: TPoint; AColor: TColor; R: Integer);
+  begin
+    Chart.Drawer.SetBrushParams(bsSolid, AColor);
+    Chart.Drawer.Ellipse(P.x - R, P.y - R, P.x + R, P.y + R);
+  end;
+
+  function GetColor(y, yref: Integer): TColor;
+  begin
+    if y > yref then Result := COLOR_BELOW else Result := COLOR_ABOVE;
+  end;
+
+var
+  i: Integer;
+  gp: TDoublePoint;
+  p1, p2, p3: TPoint;
+  yref: Integer;
+  x: Integer;
+  showDataPoints: Boolean;
+begin
+  showDataPoints := cbShowDataPoints.Checked;
+  Chart.Drawer.Pen := Pen;
+  yref := Chart.YGraphToImage(ReferenceLine.Position);
+
+  i := 0;
+  gp := DoublePoint(Data[i].X, Data[i].Y);
+  p1 := Chart.GraphToImage(gp);
+  if showDataPoints then begin
+    Chart.Drawer.SetPenParams(psSolid, GetColor(p1.y, yref));
+    DrawCircle(p2, GetColor(p2.y, yref), RADIUS);
+  end;
+
+  for i:=0 to High(Data)-1 do begin
+    gp := DoublePoint(Data[i].X, Data[i].Y);
+    p2 := Chart.GraphToImage(gp);
+    if (p2.y - yref) * (p1.y - yref) < 0 then begin
+      p3 := Point(Intersect(p1, p2, yref), yref);
+      Chart.Drawer.SetPenParams(psSolid, GetColor(p1.y, yref));
+      Chart.Drawer.Line(p1, p3);
+      Chart.Drawer.SetPenParams(psSolid, GetColor(p2.y, yref));
+      Chart.Drawer.Line(p3, p2);
+    end else begin
+      Chart.Drawer.SetPenParams(psSolid, GetColor(p2.y, yref));
+      Chart.Drawer.Line(p1, p2);
+    end;
+    if showDataPoints then
+      DrawCircle(p2, GetColor(p2.y, yref), RADIUS);
+    p1 := p2;
+  end;
+end;
+
+procedure TMainForm.SeriesGetBounds(var ABounds: TDoubleRect);
+begin
+  ABounds := Extent;
+end;
+
+procedure TMainForm.cbShowDataPointsChange(Sender: TObject);
+begin
+  Chart.Invalidate;
+end;
+
+procedure TMainForm.FormCreate(Sender: TObject);
+const
+  N = 20;
+  XMIN = -10;
+  XMAX = +10;
+var
+  i: Integer;
+  x, y: Double;
+begin
+  Chart.DoubleBuffered := true;
+
+  Pen := TPen.Create;
+  Pen.Width := 3;
+
+  SetLength(Data, N);
+  for i:=0 to N-1 do begin
+    Data[i].x := XMIN + (XMAX - XMIN) / (N - 1) * i;
+//    Data[i].y := sin(Data[i].x);
+    Data[i].y := (Random * 2 - 1) * 100;
+  end;
+
+  Extent.a.x := Data[0].x;
+  Extent.a.y := Data[0].y;
+  Extent.b.x := Data[0].x;
+  Extent.b.y := Data[0].y;
+  for i:= 1 to High(Data) do begin
+    Extent.a.x := Min(Extent.a.x, Data[i].x);
+    Extent.b.x := Max(Extent.b.x, Data[i].x);
+    Extent.a.y := Min(Extent.a.y, Data[i].y);
+    Extent.b.y := Max(Extent.b.y, Data[i].y);
+  end;
+end;
+
+procedure TMainForm.FormDestroy(Sender: TObject);
+begin
+  Pen.Free;
+end;
+
+
+end.
+

components/tachart/demo/userdrawn_series/userdrawn_demo.lpi

@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<CONFIG>
+  <ProjectOptions>
+    <Version Value="11"/>
+    <PathDelim Value="\"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <Title Value="userdrawn_demo"/>
+      <Scaled Value="True"/>
+      <ResourceType Value="res"/>
+      <UseXPManifest Value="True"/>
+      <XPManifest>
+        <DpiAware Value="True"/>
+      </XPManifest>
+      <Icon Value="0"/>
+    </General>
+    <BuildModes Count="1">
+      <Item1 Name="Default" Default="True"/>
+    </BuildModes>
+    <PublishOptions>
+      <Version Value="2"/>
+    </PublishOptions>
+    <RunParams>
+      <FormatVersion Value="2"/>
+      <Modes Count="0"/>
+    </RunParams>
+    <RequiredPackages Count="2">
+      <Item1>
+        <PackageName Value="TAChartLazarusPkg"/>
+      </Item1>
+      <Item2>
+        <PackageName Value="LCL"/>
+      </Item2>
+    </RequiredPackages>
+    <Units Count="2">
+      <Unit0>
+        <Filename Value="userdrawn_demo.lpr"/>
+        <IsPartOfProject Value="True"/>
+      </Unit0>
+      <Unit1>
+        <Filename Value="main.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="MainForm"/>
+        <HasResources Value="True"/>
+        <ResourceBaseClass Value="Form"/>
+      </Unit1>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="11"/>
+    <PathDelim Value="\"/>
+    <Target>
+      <Filename Value="userdrawn_demo"/>
+    </Target>
+    <SearchPaths>
+      <IncludeFiles Value="$(ProjOutDir)"/>
+      <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
+    </SearchPaths>
+    <Linking>
+      <Options>
+        <Win32>
+          <GraphicApplication Value="True"/>
+        </Win32>
+      </Options>
+    </Linking>
+  </CompilerOptions>
+  <Debugging>
+    <Exceptions Count="3">
+      <Item1>
+        <Name Value="EAbort"/>
+      </Item1>
+      <Item2>
+        <Name Value="ECodetoolError"/>
+      </Item2>
+      <Item3>
+        <Name Value="EFOpenError"/>
+      </Item3>
+    </Exceptions>
+  </Debugging>
+</CONFIG>

components/tachart/demo/userdrawn_series/userdrawn_demo.lpr

@@ -0,0 +1,22 @@
+program userdrawn_demo;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms, main, tachartlazaruspkg
+  { you can add units after this };
+
+{$R *.res}
+
+begin
+  RequireDerivedFormResource := True;
+  Application.Scaled := True;
+  Application.Initialize;
+  Application.CreateForm(TMainForm, MainForm);
+  Application.Run;
+end.
+