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1.1 root 1: /*==============================================================*\
2: * img_init.c - routines for initialization
3: * Created 1989, 1990 IBM, Microsoft Corp.
4: *--------------------------------------------------------------*
5: *
6: * This module contains the code for application initialization
7: * as well as the code for exit list processing.
8: *
9: *--------------------------------------------------------------*
10: *
11: * This source file contains the following functions:
12: *
13: * Init()
14: * InitMainWindow(hwnd, mp1, mp2)
15: * InitGlobalVars()
16: * InitClientArea(hwnd)
17: *
18: *
19: \*==============================================================*/
20: /*--------------------------------------------------------------*\
21: * Include files, macros, defined constants, and externs *
22: \*--------------------------------------------------------------*/
23: #define INCL_DOSPROCESS
24: #define INCL_DOSERRORS
25: #define INCL_WINWINDOWMGR
26: #define INCL_WINFRAMEMGR
27: #define INCL_WINSYS
28: #define INCL_WINPOINTERS
29: #define INCL_GPIPRIMITIVES
30:
31: #include <os2.h>
32: #include "img_main.h"
33: #include "img_xtrn.h"
34:
35: /*--------------------------------------------------------------*\
36: * Entry point declarations *
37: \*--------------------------------------------------------------*/
38: BOOL InitMainWindow(VOID);
39: BOOL InitGlobalVars(VOID);
40: BOOL InitClientArea(HWND hwnd);
41:
42: /*--------------------------------------------------------------*\
43: * static variables *
44: \*--------------------------------------------------------------*/
45: CHAR szAppName[CCHAPPNAME]; /* application title */
46: #define RETURN_ERROR 1 /* error return in DosExit */
47:
48: /****************************************************************\
49: * Initialization routine *
50: *--------------------------------------------------------------*
51: * *
52: * Name: Init() *
53: * *
54: * Purpose: Performs initialization functions. *
55: * *
56: * Usage: Called once before the main window is created. *
57: * *
58: * Method: *
59: * - register all window classes *
60: * - setup main application window *
61: * - set global variables *
62: * *
63: * Returns: *
64: * NO_ERROR - initiaization is successful *
65: * String_ID - initialization failed *
66: \****************************************************************/
67: USHORT Init(VOID)
68: {
69: /* Add ExitProc to the exit list to handle the exit processing. If
70: * there is an error, then terminate the process since there have
71: * not been any resources allocated yet
72: */
73: if (DosExitList(EXLST_ADD, (PFNEXITLIST)ExitProc)) {
74: MessageBox(HWND_DESKTOP,
75: IDMSG_CANNOTLOADEXITLIST, 0,
76: MB_OK | MB_ERROR,
77: TRUE);
78: DosExit(EXIT_PROCESS, RETURN_ERROR);
79: }
80:
81: /* load application name from resource file */
82: if (!WinLoadString(vhab, NULL, IDS_APPNAME, CCHAPPNAME, szAppName))
83: return IDMSG_CANNOTLOADSTRING;
84:
85: /* register the main client window class */
86: if (!WinRegisterClass(vhab,
87: szAppName,
88: (PFNWP)MainWndProc,
89: 0L,
90: 0))
91: return IDMSG_INITFAILED;
92:
93: /*
94: * create main application window & detach scrollbars
95: */
96: if (!InitMainWindow())
97: return IDMSG_MAINWINCREATEFAILED;
98:
99: /*
100: * set up globals used for sizing & system pointers
101: */
102: if (!InitGlobalVars())
103: return IDMSG_INITFAILED;
104:
105: /*
106: * this function prepares the application for loading images
107: */
108: InitClientArea(vhwndClient);
109:
110: /*
111: * initialise help mechanism
112: */
113: #ifdef HELP_MANAGER_ENABLED
114: HelpInit();
115: #endif
116:
117: return NO_ERROR;
118:
119: } /* Init() */
120:
121: /****************************************************************\
122: * Main Window Setup Routine *
123: *--------------------------------------------------------------*
124: * *
125: * Name: InitMainWindow() *
126: * *
127: * Purpose: Creates the application window and puts it into *
128: * it's initial state. *
129: * *
130: * Usage: Called once by the Init() routine *
131: * *
132: * Method: *
133: * - create main application window *
134: * - detach scrollbars from window *
135: * - subclass frame window procedure *
136: * *
137: * Returns: *
138: * TRUE - window successfully created *
139: * FALSE - window creation failed *
140: \****************************************************************/
141: BOOL InitMainWindow(VOID)
142: {
143: ULONG ctlData = FCF_STANDARD | FCF_VERTSCROLL | FCF_HORZSCROLL;
144:
145: /*
146: * create a window with standard controls
147: */
148: vhwndFrame = WinCreateStdWindow(
149: HWND_DESKTOP,
150: WS_VISIBLE,
151: &ctlData,
152: szAppName,
153: (PSZ)NULL,
154: WS_CLIPCHILDREN,
155: (HMODULE)NULL,
156: IDR_MAIN,
157: &vhwndClient);
158: if (!vhwndFrame)
159: return FALSE;
160:
161: /*
162: * for the time being detach the scrollbars from the main
163: * window - but remember their handles for later
164: */
165: vhwndVScroll = WinWindowFromID(vhwndFrame, FID_VERTSCROLL);
166: vhwndHScroll = WinWindowFromID(vhwndFrame, FID_HORZSCROLL);
167: WinSetParent(vhwndVScroll, HWND_OBJECT, FALSE);
168: WinSetParent(vhwndHScroll, HWND_OBJECT, FALSE);
169: WinSendMsg(vhwndFrame, WM_UPDATEFRAME,
170: MPFROMLONG(FCF_VERTSCROLL | FCF_HORZSCROLL), 0L);
171:
172: /* save menubar handle */
173: vhwndMenu = WinWindowFromID(vhwndFrame, FID_MENU);
174:
175: /*
176: * the frame window procedure is subclassed, so that frame-sizing
177: * restrictions can be implemented.
178: */
179: if (!WinRegisterClass(vhab,
180: "SUBFRAME",
181: (PFNWP)FrameWndProc,
182: 0L,
183: 0))
184: return FALSE;
185: vpfnwpFrame = WinSubclassWindow(vhwndFrame, (PFNWP)FrameWndProc);
186:
187: return TRUE;
188:
189: } /* InitMainWindow() */
190:
191: /****************************************************************\
192: * Client Area Preparation *
193: *--------------------------------------------------------------*
194: * *
195: * Name: InitClientArea() *
196: * *
197: * Purpose: Prepares the client area to accept the images *
198: * *
199: * Usage: Called once by the Init() routine *
200: * *
201: * Method: *
202: * - obtain a window device context *
203: * - define the image presentation space *
204: * - associate the two *
205: * - set foreground/background colours & *
206: * background mix for the presentation space *
207: * Returns: *
208: * TRUE - client area successfully setup *
209: * FALSE - client area setup failed *
210: \****************************************************************/
211: BOOL InitClientArea(hwnd)
212: HWND hwnd; /* client window handle */
213: {
214: SIZEL sizl;
215:
216: sizl.cx = 0L; /* set size to default for device */
217: sizl.cy = 0L; /* (full screen) */
218:
219: vhdc = WinOpenWindowDC(hwnd);
220: if (!vhdc)
221: return FALSE;
222:
223: vhps = GpiCreatePS(vhab,
224: vhdc,
225: &sizl,
226: (ULONG)PU_PELS | GPIT_NORMAL | GPIA_ASSOC
227: );
228: if (!vhps)
229: return FALSE;
230:
231: GpiSetColor(vhps, vlForeClr);
232: GpiSetBackColor(vhps, vlBackClr);
233: GpiSetBackMix(vhps, BM_OVERPAINT);
234:
235: return TRUE;
236:
237: } /* InitClientArea() */
238:
239: /****************************************************************\
240: * Global Variable Initialisation Routine *
241: *--------------------------------------------------------------*
242: * *
243: * Name: InitGlobalVars() *
244: * *
245: * Purpose: Performs initialization of the application *
246: * global variables * * *
247: * Usage: Called once by the Init() routine *
248: * *
249: * Returns: *
250: * TRUE - initialization is successful *
251: * FALSE - initialization failed *
252: * *
253: \****************************************************************/
254: BOOL InitGlobalVars(VOID)
255: {
256: /* load system sizes */
257: vlXScreen = WinQuerySysValue(HWND_DESKTOP, SV_CXSCREEN);
258: vlYScreen = WinQuerySysValue(HWND_DESKTOP, SV_CYSCREEN);
259: vlcxVScroll = WinQuerySysValue(HWND_DESKTOP, SV_CXVSCROLL);
260: vlcyHScroll = WinQuerySysValue(HWND_DESKTOP, SV_CYHSCROLL);
261: vlcyTitle = WinQuerySysValue(HWND_DESKTOP, SV_CYTITLEBAR);
262: vlcyMenu = WinQuerySysValue(HWND_DESKTOP, SV_CYMENU);
263: vlcxBorder = WinQuerySysValue(HWND_DESKTOP, SV_CXSIZEBORDER);
264: vlcyBorder = WinQuerySysValue(HWND_DESKTOP, SV_CYSIZEBORDER);
265:
266: /* load system pointers */
267: vhptrArrow = WinQuerySysPointer(HWND_DESKTOP, SPTR_ARROW, FALSE);
268: vhptrWait = WinQuerySysPointer(HWND_DESKTOP, SPTR_WAIT, FALSE);
269: return TRUE;
270: }
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