TAChart: Add 'script' demo

git-svn-id: trunk@41813 -

.gitattributes

@@ -3244,6 +3244,10 @@ components/tachart/demo/save/main.lfm svneol=native#text/plain
 components/tachart/demo/save/main.pas svneol=native#text/plain
 components/tachart/demo/save/savedemo.lpi svneol=native#text/plain
 components/tachart/demo/save/savedemo.lpr svneol=native#text/plain
+components/tachart/demo/script/Main.lfm svneol=native#text/plain
+components/tachart/demo/script/Main.pas svneol=native#text/pascal
+components/tachart/demo/script/scriptdemo.lpi svneol=native#text/plain
+components/tachart/demo/script/scriptdemo.lpr svneol=native#text/pascal
 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/script/Main.lfm

@@ -0,0 +1,72 @@
+object Form1: TForm1
+  Left = 354
+  Height = 388
+  Top = 145
+  Width = 550
+  Caption = 'Form1'
+  ClientHeight = 388
+  ClientWidth = 550
+  LCLVersion = '1.1'
+  object Chart1: TChart
+    Left = 0
+    Height = 338
+    Top = 0
+    Width = 550
+    AxisList = <    
+      item
+        Minors = <>
+        Title.LabelFont.Orientation = 900
+      end    
+      item
+        Alignment = calBottom
+        Minors = <>
+      end>
+    Foot.Brush.Color = clBtnFace
+    Foot.Font.Color = clBlue
+    Title.Brush.Color = clBtnFace
+    Title.Font.Color = clBlue
+    Title.Text.Strings = (
+      'TAChart'
+    )
+    Align = alClient
+    ParentColor = False
+    object Chart1FuncSeries1: TFuncSeries
+      Active = False
+      Extent.UseXMax = True
+      Extent.UseXMin = True
+      Extent.XMax = 1
+      Extent.XMin = -1
+      OnCalculate = Chart1FuncSeries1Calculate
+      ExtentAutoY = True
+      Pen.Color = clGreen
+      Pen.Width = 2
+    end
+  end
+  object Panel1: TPanel
+    Left = 0
+    Height = 50
+    Top = 338
+    Width = 550
+    Align = alBottom
+    ClientHeight = 50
+    ClientWidth = 550
+    TabOrder = 1
+    object edFormula: TEdit
+      Left = 18
+      Height = 27
+      Top = 12
+      Width = 414
+      TabOrder = 0
+      Text = 'sin(x*5) + x'
+    end
+    object btnRefresh: TButton
+      Left = 448
+      Height = 27
+      Top = 12
+      Width = 75
+      Caption = 'Refresh'
+      OnClick = btnRefreshClick
+      TabOrder = 1
+    end
+  end
+end

components/tachart/demo/script/Main.pas

@@ -0,0 +1,113 @@
+unit Main;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, ExtCtrls, StdCtrls, SysUtils, FileUtil, Forms, Controls, Graphics,
+  Dialogs, TAFuncSeries, TAGraph;
+
+type
+  TForm1 = class(TForm)
+    btnRefresh: TButton;
+    Chart1: TChart;
+    Chart1FuncSeries1: TFuncSeries;
+    edFormula: TEdit;
+    Panel1: TPanel;
+    procedure btnRefreshClick(Sender: TObject);
+    procedure Chart1FuncSeries1Calculate(const AX: Double; out AY: Double);
+  end;
+
+var
+  Form1: TForm1;
+
+implementation
+
+{$R *.lfm}
+uses
+  uPSCompiler, uPSRuntime, uPSUtils;
+
+type
+  TUserFunction = function (AX: Double): Double of object;
+
+var
+  exec: TPSExec;
+  userFunc: TUserFunction;
+
+function ScriptOnExportCheck(
+  ASender: TPSPascalCompiler; AProc: TPSInternalProcedure;
+  const AProcDecl: string): Boolean;
+begin
+  if AProc.Name = 'FN' then
+    if not ExportCheck(ASender, AProc, [btDouble, btDouble], [pmIn]) then begin
+      ASender.MakeError('', ecTypeMismatch, '');
+      exit(false);
+    end;
+  Result := true;
+end;
+
+function ScriptOnUses(ASender: TPSPascalCompiler; const AName: string): Boolean;
+begin
+  Result := AName = 'SYSTEM';
+end;
+
+procedure CompileScript(const AScript: string);
+var
+  data: string;
+begin
+  FreeAndNil(exec);
+
+  with TPSPascalCompiler.Create do
+    try
+      OnUses := @ScriptOnUses;
+      OnExportCheck := @ScriptOnExportCheck;
+      AllowNoBegin := true;
+      AllowNoEnd := true;
+      if not Compile(AScript) then exit;
+      GetOutput(data);
+    finally
+      Free;
+    end;
+
+  exec := TPSExec.Create;
+
+  if not exec.LoadData(data) then begin
+    FreeAndNil(exec);
+    exit;
+  end;
+
+  userFunc := TUserFunction(exec.GetProcAsMethodN('FN'));
+  if userFunc = nil then
+    FreeAndNil(exec);
+end;
+
+{ TForm1 }
+
+procedure TForm1.btnRefreshClick(Sender: TObject);
+begin
+  CompileScript(
+    'function fn(x: Double): Double; begin Result := ' + edFormula.Text +
+    '; end;');
+  with edFormula do
+    if exec = nil then
+      Color := clRed
+    else
+      Color := clDefault;
+  Chart1FuncSeries1.Active := true;
+  Chart1.Invalidate;
+end;
+
+procedure TForm1.Chart1FuncSeries1Calculate(const AX: Double; out AY: Double);
+begin
+  if exec = nil then
+    AY := AX
+  else
+    AY := userFunc(AX);
+end;
+
+finalization
+  FreeAndNil(exec);
+
+end.
+

components/tachart/demo/script/scriptdemo.lpi

@@ -0,0 +1,93 @@
+<?xml version="1.0"?>
+<CONFIG>
+  <ProjectOptions>
+    <Version Value="9"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <Title Value="scriptdemo"/>
+      <ResourceType Value="res"/>
+      <UseXPManifest Value="True"/>
+      <Icon Value="0"/>
+    </General>
+    <i18n>
+      <EnableI18N LFM="False"/>
+    </i18n>
+    <VersionInfo>
+      <StringTable ProductVersion=""/>
+    </VersionInfo>
+    <BuildModes Count="1">
+      <Item1 Name="Default" Default="True"/>
+    </BuildModes>
+    <PublishOptions>
+      <Version Value="2"/>
+    </PublishOptions>
+    <RunParams>
+      <local>
+        <FormatVersion Value="1"/>
+      </local>
+    </RunParams>
+    <RequiredPackages Count="3">
+      <Item1>
+        <PackageName Value="pascalscript"/>
+      </Item1>
+      <Item2>
+        <PackageName Value="TAChartLazarusPkg"/>
+      </Item2>
+      <Item3>
+        <PackageName Value="LCL"/>
+      </Item3>
+    </RequiredPackages>
+    <Units Count="2">
+      <Unit0>
+        <Filename Value="scriptdemo.lpr"/>
+        <IsPartOfProject Value="True"/>
+        <UnitName Value="scriptdemo"/>
+      </Unit0>
+      <Unit1>
+        <Filename Value="Main.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="Form1"/>
+        <HasResources Value="True"/>
+        <ResourceBaseClass Value="Form"/>
+        <UnitName Value="Main"/>
+      </Unit1>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="11"/>
+    <Target>
+      <Filename Value="scriptdemo"/>
+    </Target>
+    <SearchPaths>
+      <IncludeFiles Value="$(ProjOutDir)"/>
+      <UnitOutputDirectory Value="lib/$(TargetCPU)-$(TargetOS)"/>
+    </SearchPaths>
+    <Linking>
+      <Options>
+        <Win32>
+          <GraphicApplication Value="True"/>
+        </Win32>
+      </Options>
+    </Linking>
+    <Other>
+      <CompilerMessages>
+        <MsgFileName Value=""/>
+      </CompilerMessages>
+      <CompilerPath Value="$(CompPath)"/>
+    </Other>
+  </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/script/scriptdemo.lpr

@@ -0,0 +1,21 @@
+program scriptdemo;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms, Main, pascalscript, tachartlazaruspkg
+  { you can add units after this };
+
+{$R *.res}
+
+begin
+  RequireDerivedFormResource := True;
+  Application.Initialize;
+  Application.CreateForm(TForm1, Form1);
+  Application.Run;
+end.
+