Examples: Restructure GroupBox demo.

examples/simple/rad/groupbox/groupbox_demo.lpi

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+<?xml version="1.0" encoding="UTF-8"?>
+<CONFIG>
+  <ProjectOptions>
+    <Version Value="12"/>
+    <PathDelim Value="\"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <Title Value="groupbox_demo"/>
+      <Scaled Value="True"/>
+      <ResourceType Value="res"/>
+      <UseXPManifest Value="True"/>
+      <XPManifest>
+        <DpiAware Value="True"/>
+      </XPManifest>
+      <Icon Value="0"/>
+    </General>
+    <BuildModes>
+      <Item Name="Default" Default="True"/>
+    </BuildModes>
+    <PublishOptions>
+      <Version Value="2"/>
+      <UseFileFilters Value="True"/>
+    </PublishOptions>
+    <RunParams>
+      <FormatVersion Value="2"/>
+    </RunParams>
+    <RequiredPackages>
+      <Item>
+        <PackageName Value="LCL"/>
+      </Item>
+    </RequiredPackages>
+    <Units>
+      <Unit>
+        <Filename Value="groupbox_demo.lpr"/>
+        <IsPartOfProject Value="True"/>
+      </Unit>
+      <Unit>
+        <Filename Value="groupbox_form.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="Form1"/>
+        <ResourceBaseClass Value="Form"/>
+      </Unit>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="11"/>
+    <PathDelim Value="\"/>
+    <Target>
+      <Filename Value="groupbox_demo"/>
+    </Target>
+    <SearchPaths>
+      <IncludeFiles Value="$(ProjOutDir)"/>
+      <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
+    </SearchPaths>
+    <Linking>
+      <Options>
+        <Win32>
+          <GraphicApplication Value="True"/>
+        </Win32>
+      </Options>
+    </Linking>
+  </CompilerOptions>
+  <Debugging>
+    <Exceptions>
+      <Item>
+        <Name Value="EAbort"/>
+      </Item>
+      <Item>
+        <Name Value="ECodetoolError"/>
+      </Item>
+      <Item>
+        <Name Value="EFOpenError"/>
+      </Item>
+    </Exceptions>
+  </Debugging>
+</CONFIG>

examples/simple/rad/groupbox/groupbox_demo.lpr

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+program groupbox_demo;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}
+  cthreads,
+  {$ENDIF}
+  {$IFDEF HASAMIGA}
+  athreads,
+  {$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms, groupbox_form
+  { you can add units after this };
+
+{$R *.res}
+
+begin
+  RequireDerivedFormResource:=True;
+  Application.Scaled:=True;
+  Application.Initialize;
+  Application.CreateForm(TForm1, Form1);
+  Application.Run;
+end.
+

examples/simple/rad/groupbox/groupbox_form.lfm

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+object Form1: TForm1
+  Left = 270
+  Height = 350
+  Top = 131
+  Width = 350
+  Caption = 'Groubox Demo v0.1'
+  ClientHeight = 350
+  ClientWidth = 350
+  LCLVersion = '2.3.0.0'
+  object grpTst: TGroupBox
+    Left = 10
+    Height = 200
+    Top = 70
+    Width = 300
+    Caption = 'Groupbox with 2 Buttons'
+    ClientHeight = 180
+    ClientWidth = 296
+    TabOrder = 0
+    object Button2: TButton
+      Left = 200
+      Height = 30
+      Top = 50
+      Width = 80
+      Caption = 'Width ++'
+      OnClick = Button2Click
+      TabOrder = 0
+    end
+    object CheckBox1: TCheckBox
+      Left = 200
+      Height = 19
+      Top = 100
+      Width = 77
+      Caption = 'CheckBox1'
+      TabOrder = 1
+    end
+    object Button1: TButton
+      Left = 50
+      Height = 30
+      Top = 50
+      Width = 80
+      Caption = 'Height ++'
+      OnClick = Button1Click
+      TabOrder = 2
+    end
+  end
+  object Button3: TButton
+    Left = 50
+    Height = 30
+    Top = 30
+    Width = 80
+    Caption = 'Show'
+    OnClick = Button3Click
+    TabOrder = 1
+  end
+  object Button4: TButton
+    Left = 200
+    Height = 30
+    Top = 30
+    Width = 80
+    Caption = 'Hide'
+    OnClick = Button4Click
+    TabOrder = 2
+  end
+end

examples/simple/rad/groupbox/groupbox_form.pas

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+unit groupbox_form;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls;
+
+type
+  
+  { TForm1 }
+
+  TForm1 = class(TForm)
+    Button1: TButton;
+    Button2: TButton;
+    Button3: TButton;
+    Button4: TButton;
+    CheckBox1: TCheckBox;
+    grpTst: TGroupBox;
+    procedure Button1Click(Sender: TObject);
+    procedure Button2Click(Sender: TObject);
+    procedure Button3Click(Sender: TObject);
+    procedure Button4Click(Sender: TObject);
+  private
+
+  public
+
+  end;
+
+var
+  Form1: TForm1;
+
+implementation
+
+{$R *.lfm}
+
+{ TForm1 }
+
+procedure TForm1.Button1Click(Sender: TObject);
+begin
+  if Assigned(grpTst) then 
+    grpTst.Height := grpTst.Height + 10;
+end;
+
+procedure TForm1.Button2Click(Sender: TObject);
+begin
+  if Assigned(grpTst) then begin
+    grpTst.Width := grpTst.Width + 10;
+    grpTst.Show;
+  end;
+end;
+
+procedure TForm1.Button3Click(Sender: TObject);
+begin
+  if Assigned(grpTst) then begin
+    grpTst.Show;
+  end;
+end;
+
+procedure TForm1.Button4Click(Sender: TObject);
+begin
+  if Assigned(grpTst) then begin
+    grpTst.Hide;
+  end;
+end;
+
+end.
+