POO (suite)

done/poo/exemples/PO_12/main.lfm

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+object MainForm: TMainForm
+  Left = 254
+  Height = 240
+  Top = 150
+  Width = 478
+  Caption = 'Test des messages'
+  ClientHeight = 240
+  ClientWidth = 478
+  LCLVersion = '1.4.0.4'
+  object edtDummy: TEdit
+    Left = 24
+    Height = 23
+    Top = 24
+    Width = 80
+    OnChange = edtDummyChange
+    TabOrder = 0
+    Text = 'A changer...'
+  end
+  object mmoDisplay: TMemo
+    Left = 232
+    Height = 200
+    Top = 24
+    Width = 232
+    ScrollBars = ssAutoBoth
+    TabOrder = 1
+  end
+  object btnLost: TButton
+    Left = 24
+    Height = 25
+    Top = 199
+    Width = 75
+    Caption = 'Perdu !'
+    OnClick = btnLostClick
+    TabOrder = 2
+  end
+end

done/poo/exemples/PO_12/main.pas

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+{ |========================================================================|
+  |                                                                        |
+  |                  Projet : Aller plus loin avec Lazarus                 |
+  |                  Description : POO - Programme exemple 12              |
+  |                  Unité : main.pas                                      |
+  |                  Site : www.developpez.net                             |
+  |                  Copyright : © Roland CHASTAIN & Gilles VASSEUR 2015   |
+  |                  Date:    09/06/2015 14:56:25                          |
+  |                  Version : 1.0.0                                       |
+  |                                                                        |
+  |========================================================================| }
+
+// HISTORIQUE
+// 09/06/2015 14:56:35 - 1.0.0 - première version opérationnelle
+
+// MAIN - part of "Aller plus loin avec Lazarus"
+// Copyright © Roland CHASTAIN & Gilles VASSEUR 2015
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the
+// Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.
+// If not, see <http://www.gnu.org/licenses/>.
+
+unit main;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
+  LMessages;
+
+const
+  M_CHANGEDMESSAGE = LM_User + 1; // message de changement
+  M_LOSTMESSAGE = LM_User + 2; // message perdu
+
+type
+
+  { TMainForm }
+
+  TMainForm = class(TForm)
+    btnLost: TButton;
+    edtDummy: TEdit;
+    mmoDisplay: TMemo;
+    procedure btnLostClick(Sender: TObject);
+    procedure edtDummyChange(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+    procedure Changed(var Msg: TLMessage); message M_CHANGEDMESSAGE;
+    procedure DefaultHandler(var AMessage); override;
+  end;
+
+
+var
+  MainForm: TMainForm;
+
+implementation
+
+{$R *.lfm}
+
+{ TMainForm }
+
+procedure TMainForm.edtDummyChange(Sender: TObject);
+// *** l'éditeur signale un changement ***
+var
+  Msg: TLMessage;
+begin
+  Msg.msg := M_CHANGEDMESSAGE; // assignation du message
+  Dispatch(Msg); // répartition
+  //Perform(M_CHANGEDMESSAGE, 0, 0); // envoi du message sans queue d'attente
+end;
+
+procedure TMainForm.btnLostClick(Sender: TObject);
+// *** le bouton envoie un message perdu ***
+var
+  Msg: TLMessage;
+begin
+  Msg.msg := M_LOSTMESSAGE; // assignation du message
+  Dispatch(Msg); // répartition
+  //Perform(M_LOSTMESSAGE, 0, 0); // envoi du message sans queue d'attente
+end;
+
+procedure TMainForm.Changed(var Msg: TLMessage);
+// *** changement récupéré avec numéro du message ***
+begin
+  mmoDisplay.Lines.Add('Changement ! Message : ' + IntToStr(Msg.msg));
+end;
+
+procedure TMainForm.DefaultHandler(var AMessage);
+// *** message perdu ? ***
+begin
+  // transtypage de la variable sans type en TLMessage
+  if (TLMessage(AMessage).msg = M_LOSTMESSAGE) then // message perdu ?
+    mmoDisplay.Lines.Add('Non Traité ! Message : ' + IntToStr(TLMessage(AMessage).msg));
+  inherited DefaultHandler(AMessage); // on hérite
+end;
+
+end.
+

done/poo/exemples/PO_12/testmessages.lpi

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+<?xml version="1.0" encoding="UTF-8"?>
+<CONFIG>
+  <ProjectOptions>
+    <Version Value="9"/>
+    <PathDelim Value="\"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <Title Value="testmessages"/>
+      <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="1">
+      <Item1>
+        <PackageName Value="LCL"/>
+      </Item1>
+    </RequiredPackages>
+    <Units Count="2">
+      <Unit0>
+        <Filename Value="testmessages.lpr"/>
+        <IsPartOfProject Value="True"/>
+      </Unit0>
+      <Unit1>
+        <Filename Value="main.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="MainForm"/>
+        <HasResources Value="True"/>
+        <ResourceBaseClass Value="Form"/>
+        <UnitName Value="main"/>
+      </Unit1>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="11"/>
+    <PathDelim Value="\"/>
+    <Target>
+      <Filename Value="testmessages"/>
+    </Target>
+    <SearchPaths>
+      <IncludeFiles Value="$(ProjOutDir)"/>
+      <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
+    </SearchPaths>
+    <Linking>
+      <Debugging>
+        <GenerateDebugInfo Value="False"/>
+      </Debugging>
+      <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>

done/poo/exemples/PO_12/testmessages.lpr

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+{ |========================================================================|
+  |                                                                        |
+  |                  Projet : Aller plus loin avec Lazarus                 |
+  |                  Description : POO - Programme exemple 12              |
+  |                  Unité : testmessages.lpr                              |
+  |                  Site : www.developpez.net                             |
+  |                  Copyright : © Roland CHASTAIN & Gilles VASSEUR 2015   |
+  |                  Date:    09/06/2015 14:56:25                          |
+  |                  Version : 1.0.0                                       |
+  |                                                                        |
+  |========================================================================| }
+
+// HISTORIQUE
+// 09/06/2015 14:56:35 - 1.0.0 - première version opérationnelle
+
+// TESTMESSAGES - part of "Aller plus loin avec Lazarus"
+// Copyright © Roland CHASTAIN & Gilles VASSEUR 2015
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the
+// Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.
+// If not, see <http://www.gnu.org/licenses/>.
+
+program testmessages;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms, main
+  { you can add units after this };
+
+{$R *.res}
+
+begin
+  RequireDerivedFormResource := True;
+  Application.Initialize;
+  Application.CreateForm(TMainForm, MainForm);
+  Application.Run;
+end.
+

done/poo/exemples/PO_12/testmessages.lps

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+<?xml version="1.0" encoding="UTF-8"?>
+<CONFIG>
+  <ProjectSession>
+    <PathDelim Value="\"/>
+    <Version Value="9"/>
+    <BuildModes Active="Default"/>
+    <Units Count="2">
+      <Unit0>
+        <Filename Value="testmessages.lpr"/>
+        <IsPartOfProject Value="True"/>
+        <UsageCount Value="20"/>
+      </Unit0>
+      <Unit1>
+        <Filename Value="main.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="MainForm"/>
+        <HasResources Value="True"/>
+        <ResourceBaseClass Value="Form"/>
+        <UnitName Value="main"/>
+        <IsVisibleTab Value="True"/>
+        <EditorIndex Value="-1"/>
+        <UsageCount Value="20"/>
+      </Unit1>
+    </Units>
+    <General>
+      <ActiveWindowIndexAtStart Value="-1"/>
+    </General>
+    <JumpHistory HistoryIndex="-1"/>
+  </ProjectSession>
+</CONFIG>

done/poo/exemples/PO_13/main.lfm

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+object MainForm: TMainForm
+  Left = 254
+  Height = 248
+  Top = 150
+  Width = 367
+  ActiveControl = edtNum1
+  Caption = 'Test de overload'
+  ClientHeight = 248
+  ClientWidth = 367
+  OnCreate = FormCreate
+  OnDestroy = FormDestroy
+  Position = poScreenCenter
+  LCLVersion = '1.4.0.4'
+  object edtNum1: TEdit
+    Left = 136
+    Height = 23
+    Top = 15
+    Width = 80
+    TabOrder = 0
+    Text = '22'
+  end
+  object edtNum2: TEdit
+    Left = 136
+    Height = 23
+    Top = 48
+    Width = 80
+    TabOrder = 1
+    Text = '78'
+  end
+  object lblResult: TLabel
+    Left = 176
+    Height = 15
+    Top = 144
+    Width = 6
+    Caption = '0'
+    ParentColor = False
+  end
+  object btnComputeSt: TButton
+    Left = 48
+    Height = 25
+    Top = 88
+    Width = 75
+    Caption = 'Chaînes'
+    OnClick = btnComputeStClick
+    TabOrder = 2
+  end
+  object btnComputeInt: TButton
+    Left = 232
+    Height = 25
+    Top = 88
+    Width = 75
+    Caption = 'Entiers'
+    OnClick = btnComputeIntClick
+    TabOrder = 3
+  end
+  object btnComputeStV: TButton
+    Left = 48
+    Height = 25
+    Top = 162
+    Width = 75
+    Caption = 'Chaînes V'
+    OnClick = btnComputeStVClick
+    TabOrder = 4
+  end
+  object btnComputeIntV: TButton
+    Left = 232
+    Height = 25
+    Top = 162
+    Width = 75
+    Caption = 'Entiers V'
+    OnClick = btnComputeIntVClick
+    TabOrder = 5
+  end
+end