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// Upgraded to Delphi 2009: Sebastian Zierer
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(* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TurboPower SysTools
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*
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* The Initial Developer of the Original Code is
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* TurboPower Software
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*
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* Portions created by the Initial Developer are Copyright (C) 1996-2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** *)
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{*********************************************************}
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{* SysTools: StSpawn.pas 4.04 *}
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{*********************************************************}
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{* SysTools: Component to spawn another application *}
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{*********************************************************}
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{$I StDefine.inc}
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unit StSpawn;
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interface
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uses
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SysUtils, Windows, ExtCtrls, Messages, Classes, ShellAPI,
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StBase, StConst;
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type
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TStWaitThread = class(TThread)
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protected
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FTimeOut : Longint;
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procedure Execute; override;
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public
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CancelWaitEvent : THandle;
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WaitResult : DWORD;
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WaitFors : PWOHandleArray; {!!.01}
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constructor Create(aInst, CancelIt : THandle; ATimeOut : Longint);
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destructor Destroy; override; {!!.01}
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end;
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TStSpawnCommand = (scOpen, scPrint, scOther);
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TStShowState = (ssMinimized, ssMaximized, ssNormal, ssMinNotActive);
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TStSpawnErrorEvent = procedure (Sender : TObject; Error : Word) of object;
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TStSpawnCompletedEvent = procedure (Sender : TObject) of object;
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TStSpawnTimeOutEvent = procedure (Sender : TObject) of object;
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TStSpawnApplication = class(TStComponent)
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protected {private}
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{ Private declarations }
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FAllowChange : Boolean;
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FCancelEvent : THandle;
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FDefaultDir : String;
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FFileName : String;
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FInstance : THandle;
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FNotifyWhenDone : Boolean;
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FOnCompleted : TStSpawnCompletedEvent;
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FOnSpawnError : TStSpawnErrorEvent;
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FOnSpawnTimeOut : TStSpawnTimeOutEvent;
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FRunParameters : String;
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FShowState : TStShowState;
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FSpawnCommand : TStSpawnCommand;
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FTimer : TTimer;
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FTimeOut : Longint;
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FWaitResult : DWORD;
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FWaitThread : TStWaitThread;
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FSpawnCommandStr : String;
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protected
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{ Protected declarations }
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CountDownValue : Longint;
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procedure DoOnThreadEnd(Sender : TObject);
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procedure SetDefaultDir(const Value : String); {!!.02}
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procedure SetFileName(const Value : String); {!!.02}
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procedure SetOnCompleted(Value : TStSpawnCompletedEvent);
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procedure SetOnSpawnError(Value : TStSpawnErrorEvent);
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procedure SetNotifyWhenDone(Value : Boolean);
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procedure SetRunParameters(const Value : String); {!!.02}
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procedure SetShowState(Value : TStShowState);
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procedure SetSpawnCommand(Value : TStSpawnCommand);
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procedure SetSpawnTimeOut(Value : TStSpawnTimeOutEvent);
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procedure SetTimeOut(Value : Longint);
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public
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{ Public declarations }
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constructor Create(AOwner : TComponent); override;
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destructor Destroy; override;
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procedure CancelWait;
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function Execute : THandle;
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published
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{ Published declarations }
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property DefaultDir : String
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read FDefaultDir write SetDefaultDir;
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property FileName : String
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read FFileName write SetFileName;
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property NotifyWhenDone : Boolean
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read FNotifyWhenDone write SetNotifyWhenDone default True;
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property OnCompleted : TStSpawnCompletedEvent
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read FOnCompleted write SetOnCompleted;
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property OnSpawnError : TStSpawnErrorEvent
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read FOnSpawnError write SetOnSpawnError;
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property OnTimeOut : TStSpawnTimeOutEvent
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read FOnSpawnTimeOut write SetSpawnTimeOut;
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property RunParameters : String
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read FRunParameters write SetRunParameters;
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property ShowState : TStShowState
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read FShowState write SetShowState default ssNormal;
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property SpawnCommand : TStSpawnCommand
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read FSpawnCommand write SetSpawnCommand default scOpen;
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property TimeOut : Longint
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read FTimeOut write SetTimeOut default 0;
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property SpawnCommandStr : String
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read FSpawnCommandStr write FSpawnCommandStr;
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end;
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implementation
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{-----------------------------------------------------------------------------}
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{ WIN32 WAIT THREAD }
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{-----------------------------------------------------------------------------}
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const {!!.01}
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WAIT_HANDLE_COUNT = 2; {!!.01}
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constructor TStWaitThread.Create(aInst, CancelIt : THandle; ATimeOut : Longint);
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begin
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GetMem(WaitFors, WAIT_HANDLE_COUNT * SizeOf(THandle)); {!!.01}
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WaitFors^[0] := aInst; {!!.01}
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WaitFors^[1] := CancelIt; {!!.01}
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FTimeOut := ATimeOut * 1000;
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CancelWaitEvent := CancelIt;
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inherited Create(True);
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end;
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{!!.01 - Added}
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destructor TStWaitThread.Destroy;
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begin
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FreeMem(WaitFors, WAIT_HANDLE_COUNT * SizeOf(THandle));
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inherited Destroy;
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end;
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{!!.01 - End Added}
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procedure TStWaitThread.Execute;
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begin
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if (FTimeOut > 0) then
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WaitResult := WaitForMultipleObjects(WAIT_HANDLE_COUNT, WaitFors, {!!.01}
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False, FTimeOut) {!!.01}
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else
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WaitResult := WaitForMultipleObjects(WAIT_HANDLE_COUNT, WaitFors, {!!.01}
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False, INFINITE); {!!.01}
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end;
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{-----------------------------------------------------------------------------}
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{ TStSpawnApplication }
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{-----------------------------------------------------------------------------}
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constructor TStSpawnApplication.Create(AOwner : TComponent);
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begin
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inherited Create(AOwner);
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FAllowChange := True;
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FDefaultDir := '';
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FFileName := '';
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FNotifyWhenDone := True;
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FShowState := ssNormal;
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FSpawnCommand := scOpen;
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FSpawnCommandStr := '';
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FTimer := nil;
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FTimeOut := 0;
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end;
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destructor TStSpawnApplication.Destroy;
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begin
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FTimer.Free;
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FTimer := nil;
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inherited Destroy;
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end;
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procedure TStSpawnApplication.CancelWait;
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begin
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if (FCancelEvent <> 0) then
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SetEvent(FWaitThread.CancelWaitEvent);
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end;
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procedure TStSpawnApplication.DoOnThreadEnd(Sender : TObject);
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begin
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FWaitResult := FWaitThread.WaitResult;
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case FWaitResult of
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WAIT_FAILED :
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begin
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if (Assigned(FOnSpawnError)) then
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FOnSpawnError(Self, GetLastError);
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end;
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WAIT_TIMEOUT :
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begin
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if Assigned(FOnSpawnTimeOut) then
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FOnSpawnTimeOut(Self);
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end;
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WAIT_OBJECT_0,
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WAIT_OBJECT_0 + 1 :
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begin
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if (FNotifyWhenDone) and (Assigned(FOnCompleted)) then
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FOnCompleted(Self);
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end;
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end;
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if (FCancelEvent <> 0) then begin
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SetEvent(FCancelEvent);
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CloseHandle(FCancelEvent);
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FCancelEvent := 0;
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end;
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end;
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function TStSpawnApplication.Execute : THandle;
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var
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Cmd : String;
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HowShow : integer;
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Res : Bool;
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Startup : TShellExecuteInfo;
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begin
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if (FileName = '') and (RunParameters > '') then
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RaiseStError(EStSpawnError, stscInsufficientData);
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case FSpawnCommand of
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scOpen : Cmd := 'open';
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scPrint: Cmd := 'print';
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scOther: Cmd := FSpawnCommandStr;
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end;
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case FShowState of
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ssNormal : HowShow := SW_NORMAL;
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ssMinimized : HowShow := SW_MINIMIZE;
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ssMaximized : HowShow := SW_SHOWMAXIMIZED;
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ssMinNotActive : HowShow := SW_SHOWMINNOACTIVE;
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else
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HowShow := SW_NORMAL;
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end;
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FInstance := 0;
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with Startup do begin
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cbSize := SizeOf(Startup);
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fMask := SEE_MASK_NOCLOSEPROCESS or SEE_MASK_FLAG_NO_UI;
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Wnd := 0;
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lpVerb := Pointer(Cmd);
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if (FFileName > '') then
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lpFile := PChar(FFileName)
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else
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lpFile := nil;
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if (FRunParameters > '') then
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lpParameters := PChar(FRunParameters)
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else
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lpParameters := nil;
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if (FDefaultDir > '') then
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lpDirectory := PChar(FDefaultDir)
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else
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lpDirectory := nil;
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nShow := HowShow;
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hInstApp := 0;
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end;
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Res := ShellExecuteEx(@Startup);
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FInstance := Startup.hProcess;
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if (not Res) then begin
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Result := 0;
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if (Assigned(FOnSpawnError)) then begin
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FOnSpawnError(Self, GetLastError);
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end;
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end else
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Result := FInstance;
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if (NotifyWhenDone) then begin
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FTimer := nil;
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FCancelEvent := CreateEvent(nil, False, False, PChar(FloatToStr(Now)));
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FWaitThread := TStWaitThread.Create(FInstance, FCancelEvent, FTimeOut);
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FWaitThread.OnTerminate := DoOnThreadEnd;
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FWaitThread.FreeOnTerminate := True;
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FWaitThread.Resume;
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end;
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end;
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procedure TStSpawnApplication.SetDefaultDir(const Value : String); {!!.02}
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FDefaultDir) then
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FDefaultDir := Value;
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end;
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end;
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procedure TStSpawnApplication.SetFileName(const Value : String); {!!.02}
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FileName) then
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FFileName := Value;
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end;
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end;
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procedure TStSpawnApplication.SetNotifyWhenDone(Value : Boolean);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FNotifyWhenDone) then
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FNotifyWhenDone := Value;
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end;
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end;
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procedure TStSpawnApplication.SetRunParameters(const Value : String); {!!.02}
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FRunParameters) then
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FRunParameters := Value;
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end;
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end;
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procedure TStSpawnApplication.SetOnCompleted(Value : TStSpawnCompletedEvent);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then
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FOnCompleted := Value;
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end;
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procedure TStSpawnApplication.SetOnSpawnError(Value : TStSpawnErrorEvent);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then
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FOnSpawnError := Value;
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end;
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procedure TStSpawnApplication.SetShowState(Value : TStShowState);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FShowState) then
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FShowState := Value;
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end;
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end;
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procedure TStSpawnApplication.SetSpawnCommand(Value : TStSpawnCommand);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FSpawnCommand) then
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FSpawnCommand := Value;
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end;
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end;
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procedure TStSpawnApplication.SetSpawnTimeOut(Value : TStSpawnTimeOutEvent);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then
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FOnSpawnTimeOut := Value;
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end;
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procedure TStSpawnApplication.SetTimeOut(Value : Longint);
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begin
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if (FAllowChange) or (csDesigning in ComponentState) then begin
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if (Value <> FTimeOut) and (Value >= 0) then
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FTimeOut := Value;
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end;
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end;
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end.
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