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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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midiplyr
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midiplyr.c
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C/C++ Source or Header
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1997-10-05
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7KB
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242 lines
/*****************************************************************************
*
* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
* ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR
* A PARTICULAR PURPOSE.
*
* Copyright (C) 1993 - 1997 Microsoft Corporation. All Rights Reserved.
*
******************************************************************************
*
* MIDIPlyr.C
*
* Initialization code for the polymessage MIDI playback app.
*
*****************************************************************************/
#pragma warning(disable:4756)
#define _INC_SHELLAPI
#include <windows.h>
#undef _INC_SHELLAPI
#include <shellapi.h>
#include <windowsx.h>
#include <mmsystem.h>
#include <commdlg.h>
#include <commctrl.h>
#include <ctype.h>
#include "debug.h"
#include "MIDIPlyr.H"
PUBLIC char BCODE gszMWndClass[] = "MIDIPlyrMWnd";
PUBLIC char BCODE gszTWndClass[] = "MIDIPlyrTWnd";
PUBLIC HINSTANCE ghInst = NULL;
PUBLIC PSEQ gpSeq = NULL;
PUBLIC char gszUntitled[80] = "";
PUBLIC char gszAppLongName[80] = "";
PUBLIC char gszAppTitleMask[80] = "";
PUBLIC char grgszTimeFormats[N_TIME_FORMATS][CB_TIME_FORMATS] = {0};
PUBLIC RECT grcTWnd = {0, 0, 0, 0};
PUBLIC int gnTimeFormat = 0;
PRIVATE BOOL FNLOCAL InitApp(HINSTANCE hInst);
PRIVATE BOOL FNLOCAL InitInstance(HINSTANCE hInst, int nCmdShow);
PRIVATE VOID FNLOCAL TerminateInstance(VOID);
/*****************************************************************************
*
* WinMain
*
* Called by C startup code.
*
* HANDLE hInst - Instance handle of this instance
* HANDLE hPrevInst - Instance handle of previous instance or
* NULL if we are the first instance
* LPSTR lpstrCmdLine - Any command line arguments
* int nCmdShow - Code for ShowWindow which tells us what state
* to initially show the main application window.
*
* Initialize application if first instance.
* Initialize instance.
* Stay in main message processing loop until exit.
*
*****************************************************************************/
int PASCAL WinMain(
HANDLE hInst,
HANDLE hPrevInst,
LPSTR lpstrCmdLine,
int nCmdShow)
{
MSG msg;
if (hPrevInst == NULL)
if (!InitApp(hInst))
return 0;
if (!InitInstance(hInst, nCmdShow))
{
TerminateInstance();
return 0;
}
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
TerminateInstance();
return (msg.wParam);
}
/*****************************************************************************
*
* InitApp
*
* Called for one-time initialization if we are the first app instance.
*
* HANDLE hInst - Instance handle of this instance
*
* Returns TRUE on success.
*
* Register the window class for the main window and the time window.
*
*****************************************************************************/
BOOL FNLOCAL InitApp(
HINSTANCE hInst)
{
WNDCLASS wc;
InitCommonControls();
/* Don't specify CS_HREDRAW or CS_VREDRAW if you're going to use the
** commctrl status or toolbar -- invalidate the (remaining) client
** area yourself if you want this behavior. This will allow the child
** control redraws to be much more efficient.
*/
wc.style = 0;
wc.lpfnWndProc = MWnd_WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInst;
wc.hIcon = LoadIcon(hInst, MAKEINTRESOURCE(ID_ICON));
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
wc.lpszMenuName = MAKEINTRESOURCE(ID_MENU);
wc.lpszClassName = (LPCSTR)gszMWndClass;
RegisterClass(&wc);
wc.style = CS_HREDRAW|CS_VREDRAW;
wc.lpfnWndProc = TWnd_WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInst;
wc.hIcon = LoadIcon(hInst, MAKEINTRESOURCE(ID_ICON));
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = (LPCSTR)gszTWndClass;
RegisterClass(&wc);
return TRUE;
}
/*****************************************************************************
*
* InitInstance
*
* Called once per instance of application.
*
* HANDLE hInst - Instance handle of this instance
* int nCmdShow - Code for ShowWindow which tells us what state
* to initially show the main application window.
* Returns TRUE on success.
*
* Initialize debug library.
* Save the instance handle.
* Load global resource strings.
* Allocate and initialize the global sequencer structure.
* Create the main window.
* Add time formats to the options menu.
* Show the main window.
*
*****************************************************************************/
BOOL FNLOCAL InitInstance(
HINSTANCE hInst,
int nCmdShow)
{
HWND hWnd;
int idx;
DbgInitialize(TRUE);
ghInst = hInst;
LoadString(hInst, IDS_APPTITLEMASK, gszAppTitleMask, sizeof(gszAppTitleMask));
LoadString(hInst, IDS_APPNAME, gszAppLongName, sizeof(gszAppLongName));
LoadString(hInst, IDS_UNTITLED, gszUntitled, sizeof(gszUntitled));
for (idx = 0; idx < N_TIME_FORMATS; idx++)
{
*grgszTimeFormats[idx] = '\0';
LoadString(hInst,
IDS_TF_FIRST+idx,
grgszTimeFormats[idx],
sizeof(grgszTimeFormats[idx]));
}
if ((gpSeq = (PSEQ)LocalAlloc(LPTR, sizeof(SEQ))) == NULL)
return FALSE;
gpSeq->cBuffer = C_MIDI_BUFFERS;
gpSeq->cbBuffer = CB_MIDI_BUFFERS;
if (seqAllocBuffers(gpSeq) != MMSYSERR_NOERROR)
return FALSE;
hWnd = CreateWindow(
gszMWndClass,
NULL,
WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN,
CW_USEDEFAULT,CW_USEDEFAULT,
CW_USEDEFAULT,CW_USEDEFAULT,
HWND_DESKTOP,
NULL,
hInst,
NULL);
if (hWnd == (HWND)NULL)
return FALSE;
gpSeq->hWnd = hWnd;
ShowWindow(hWnd, nCmdShow);
return TRUE;
}
/*****************************************************************************
*
* TerminateInstance
*
* Release any resources for the current instance
*
*****************************************************************************/
VOID FNLOCAL TerminateInstance(
VOID)
{
if (gpSeq != NULL)
{
seqFreeBuffers(gpSeq);
LocalFree((HLOCAL)gpSeq);
gpSeq = NULL;
}
}