199 lines
7.4 KiB
C++
199 lines
7.4 KiB
C++
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/**********************************************************************/
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/** Microsoft Windows/NT **/
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/** Copyright(c) Microsoft Corp., 1991 **/
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/**********************************************************************/
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/*
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bltapp.hxx
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Simple application framework: definition
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This class encapsulates the skeleton of a Windows application
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and messageloop as a simple "application startup" object.
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FILE HISTORY
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beng 01-Apr-1991 Added to BLT
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rustanl 17-Jun-1991 Added APPLICATION
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rustanl 15-Jul-1991 Code review changes (no functional
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differences). CR attended by
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BenG, ChuckC, Hui-LiCh, TerryK, RustanL.
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rustanl 29-Aug-1991 Virtualized Run
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beng 14-Oct-1991 Removed APPSTART
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beng 29-Jun-1992 DLLization delta
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*/
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#ifndef _BLT_HXX_
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#error "Don't include this file directly; instead, include it through blt.hxx"
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#endif // _BLT_HXX_
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#ifndef _BLTAPP_HXX_
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#define _BLTAPP_HXX_
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#include <stdlib.h>
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#include "base.hxx"
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#include "bltpump.hxx"
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/*************************************************************************
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NAME: APPLICATION
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SYNOPSIS: An application object: a thang that you run.
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INTERFACE: APPLICATION() - Constructor
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Initializes BLT and other common
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subsystems that need to be initialized
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during application start-up time.
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~APPLICATION() - Destructor
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Undoes what the constructor did
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Run() - Runs the application
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This method is called automatically
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(by the SET_ROOT_OBJECT macro).
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A subclass may replace Run, do some
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second stage construction, call the
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parent Run method, destroys things
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set up in the second stage construction.
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Run will not be called unless the object
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constructed successfully, so the Run
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method does not need to call QueryError.
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QueryArgc() - Return # of args on command line
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QueryArgv() - Return the tokenized command line
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PARENT: BASE, HAS_MESSAGE_PUMP
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NOTES:
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The constructor, Run method, and destructor are all
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accessible only to BltMain. SET_ROOT_OBJECT will handle
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this for the application.
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Currently ignores the Windows command line.
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HISTORY:
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rustanl 17-Jun-1991 Created
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beng 08-Jul-1991 Accessible only to BltMain;
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FilterMessage added
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rustanl 29-Aug-1991 Virtualized Run
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rustanl 04-Sep-1991 Added DisplayCtError
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beng 07-Oct-1991 Uses HAS_MESSAGE_PUMP
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beng 24-Apr-1992 More realistic command-line support
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beng 03-Aug-1992 Add QueryInstance
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**************************************************************************/
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DLL_CLASS APPLICATION : public BASE, public HAS_MESSAGE_PUMP
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{
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friend INT BltMain(HINSTANCE hInst, INT nShow);
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private:
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HINSTANCE _hInstance;
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BOOL _fMsgPopupIsInit;
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VOID DisplayCtError( APIERR err );
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protected:
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APPLICATION( HINSTANCE hInstance, INT nCmdShow,
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UINT nMinR, UINT nMaxR, UINT nMinS, UINT nMaxS );
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~APPLICATION();
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virtual INT Run();
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public:
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HINSTANCE QueryInstance() const
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{ return _hInstance; }
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static BOOL IsSystemInitialized( VOID );
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// The runtime takes care of support for the following
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// in DLLCLIENT vs APP situations.
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#if 0
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//#ifdef _DLL
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static CHAR ** QueryArgv()
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{ return * :: __argv_dll; }
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static const UINT QueryArgc()
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{ return * :: __argc_dll; }
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#else
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static CHAR ** QueryArgv()
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{ return __argv; }
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static const UINT QueryArgc()
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{ return __argc; }
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#endif /* _DLL */
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};
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/*******************************************************************
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NAME: SET_ROOT_OBJECT
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SYNOPSIS: Macro that allows a client to specify what class
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describes the application. The macro will arrange
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for the construction, execution, and destruction of
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an instance of a particular type of APPLICATION.
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ENTRY: root_obj_class_name - Name of class that describes
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the application
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CAVEATS: This macro sets up the app's WinMain.
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Clients should not try to supply their own WinMain.
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NOTES: This macro should be used exactly once in every
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application.
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Clients of APPLICATION may still set a breakpoint
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at WinMain, generating a break before the application
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really gets started.
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HISTORY:
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rustanl 17-Jun-1991 Created
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beng 08-Jul-1991 Emits BltMain instead of WinMain
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rustanl 29-Aug-1991 Virtualized Run
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rustanl 04-Sep-1991 Make use of new DisplayCtError
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beng 24-Apr-1992 Ignore Windows command line
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beng 29-Jun-1992 DLLization delta (includes WinMain)
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KeithMo 11-May-1993 Fail gracefully if USER32 not initialized.
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********************************************************************/
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#define SET_ROOT_OBJECT( root_class_name, idMinR, idMaxR, idMinS, idMaxS ) \
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INT BltMain( HINSTANCE hInstance, INT nCmdShow ) \
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{ \
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if( !APPLICATION::IsSystemInitialized() ) \
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{ \
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return (INT)ERROR_ACCESS_DENIED; \
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} \
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root_class_name app( hInstance, nCmdShow, \
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idMinR, idMaxR, \
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idMinS, idMaxS ); \
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if ( app.QueryError() != NERR_Success ) \
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{ \
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app.DisplayCtError( app.QueryError()); \
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return (INT)app.QueryError(); \
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} \
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/* The following is a trick to get */ \
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/* to the protected Run method of */ \
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/* an APPLICATION subclass. */ \
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APPLICATION * papp = &app; \
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return papp->Run(); \
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} \
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extern "C" { \
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INT WINAPI WinMain(HINSTANCE hInstance, \
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HINSTANCE hPrevInstance, \
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CHAR * pszCmdLine, \
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INT nCmdShow) \
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{ \
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UNREFERENCED(hPrevInstance); \
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UNREFERENCED(pszCmdLine); \
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return BltMain(hInstance, nCmdShow ); \
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} \
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} \
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#endif // _BLTAPP_HXX_ - end of file
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