142 lines
4.3 KiB
ObjectPascal
142 lines
4.3 KiB
ObjectPascal
{******************************************************************
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JEDI-VCL Demo
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Copyright (C) 2002 Project JEDI
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Original author:
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You may retrieve the latest version of this file at the JEDI-JVCL
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home page, located at http://jvcl.sourceforge.net
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The contents of this file are used with permission, subject to
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the Mozilla Public License Version 1.1 (the "License"); you may
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not use this file except in compliance with the License. You may
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obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1_1Final.html
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Software distributed under the License is distributed on an
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"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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implied. See the License for the specific language governing
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rights and limitations under the License.
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******************************************************************}
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unit Main;
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{$I jvcl.inc}
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interface
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uses
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Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
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Dialogs, StdCtrls, JvAppInst;
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type
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TFormMain = class(TForm)
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MemoCmdLine: TMemo;
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MemoLog: TMemo;
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BtnQuit: TButton;
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JvAppInstances: TJvAppInstances;
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Button1: TButton;
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CheckBoxActive: TCheckBox;
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Label1: TLabel;
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RunningInstances: TLabel;
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Label2: TLabel;
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MaxInstances: TLabel;
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procedure FormCreate(Sender: TObject);
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procedure BtnQuitClick(Sender: TObject);
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procedure CheckBoxActiveClick(Sender: TObject);
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procedure EvCmdLineReceived(Sender: TObject;
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CmdLine: TStrings);
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procedure EvInstanceCreated(Sender: TObject; ProcessId: Cardinal);
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procedure EvInstanceDestroyed(Sender: TObject; ProcessId: Cardinal);
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procedure JvAppInstancesRejected(Sender: TObject);
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procedure JvAppInstancesUserNotify(Sender: TObject; Param: Integer);
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procedure Button1Click(Sender: TObject);
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private
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public
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end;
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var
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FormMain: TFormMain;
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implementation
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{$R *.dfm}
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procedure TFormMain.FormCreate(Sender: TObject);
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begin
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Caption := 'Pid: ' + IntToStr(GetCurrentProcessId);
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CheckBoxActive.Checked := JvAppInstances.Active;
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MaxInstances.Caption := Format('%d', [JvAppInstances.MaxInstances]);
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RunningInstances.Caption := Format('%d', [JvAppInstances.AppInstances.InstanceCount]);
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end;
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procedure TFormMain.BtnQuitClick(Sender: TObject);
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begin
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Close;
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end;
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procedure TFormMain.CheckBoxActiveClick(Sender: TObject);
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begin
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JvAppInstances.Active := CheckBoxActive.Checked;
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end;
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procedure TFormMain.EvCmdLineReceived(Sender: TObject; CmdLine: TStrings);
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begin
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MemoCmdLine.Lines.Assign(CmdLine);
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end;
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procedure TFormMain.EvInstanceCreated(Sender: TObject;
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ProcessId: Cardinal);
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begin
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MemoLog.Lines.Add('Instance created (Pid: ' + IntToStr(ProcessId) + ')');
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MaxInstances.Caption := Format('%d', [JvAppInstances.MaxInstances]);
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RunningInstances.Caption := Format('%d', [JvAppInstances.AppInstances.InstanceCount]);
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end;
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procedure TFormMain.EvInstanceDestroyed(Sender: TObject;
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ProcessId: Cardinal);
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begin
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MemoLog.Lines.Add('Instance destroyed (Pid: ' + IntToStr(ProcessId) + ')');
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MaxInstances.Caption := Format('%d', [JvAppInstances.MaxInstances]);
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RunningInstances.Caption := Format('%d', [JvAppInstances.AppInstances.InstanceCount]);
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end;
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procedure TFormMain.JvAppInstancesRejected(Sender: TObject);
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begin
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ShowMessage('I was rejected (Pid: ' + IntToStr(GetCurrentProcessId) + ').'#10 +
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'Now I call UserNotify(100)');
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JvAppInstances.UserNotify(100);
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MaxInstances.Caption := Format('%d', [JvAppInstances.MaxInstances]);
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RunningInstances.Caption := Format('%d', [JvAppInstances.AppInstances.InstanceCount]);
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end;
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procedure TFormMain.JvAppInstancesUserNotify(Sender: TObject;
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Param: Integer);
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begin
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MemoLog.Lines.Add('UserNotify: ' + IntToStr(Param));
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end;
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procedure TFormMain.Button1Click(Sender: TObject);
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var
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ProcessInfo: TProcessInformation;
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StartupInfo: TStartupInfo;
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begin
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StartupInfo.cb := SizeOf(StartupInfo);
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GetStartupInfo(StartupInfo);
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if CreateProcess(nil, PChar(ParamStr(0) + ' "1st Argument" /second /third'),
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nil, nil, False, 0, nil, nil, StartupInfo, ProcessInfo) then
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begin
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// we do not need them
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CloseHandle(ProcessInfo.hThread);
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CloseHandle(ProcessInfo.hProcess);
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end
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else
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MessageDlg('Error starting new process instance.', mtError, [mbOk], 0);
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end;
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end.
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