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1.1 root 1: /*==============================================================*\
2: * img_menu.c - routines for menu handling
3: * Created 1989, 1990 IBM, Microsoft Corp.
4: *--------------------------------------------------------------*
5: *
6: * This module contains the code for initializing menus as a
7: * result of a WM_INITMENU message, and also code for disabling/
8: * enabling single menu items.
9: *
10: *--------------------------------------------------------------*
11: *
12: * This source file contains the following functions:
13: *
14: * MenuInit()
15: * MenuEnableItem(hwndMenu, idItem, fEnabled)
16: *
17: \*==============================================================*/
18: /*--------------------------------------------------------------*\
19: * Include files, macros, defined constants, and externs *
20: \*--------------------------------------------------------------*/
21: #define INCL_WINMENUS
22: #define INCL_WINFRAMEMGR
23: #include <os2.h>
24: #include "img_main.h"
25: #include "img_xtrn.h"
26:
27: /*--------------------------------------------------------------*\
28: * Entry point declarations *
29: \*--------------------------------------------------------------*/
30: VOID MenuEnableItem(HWND hwndMenu, SHORT idItem, BOOL fEnable);
31:
32: /****************************************************************\
33: * Menu item intialization routine
34: *--------------------------------------------------------------
35: *
36: * Name: MenuInit(mp1, mp2)
37: *
38: * Purpose: Processes the WM_INITMENU message for the main window,
39: * disabling any menus that are not active
40: *
41: * Usage: Routine is called each time a menu is dropped
42: *
43: * Method: A switch statement branches control based upon
44: * the id of the menu which is being displayed
45: *
46: * Returns:
47: \****************************************************************/
48: VOID MenuInit(mp1, mp2)
49: MPARAM mp1; /* first message parameter */
50: MPARAM mp2; /* second message parameter */
51: {
52:
53: switch(SHORT1FROMMP(mp1)) {
54: case IDM_FILE:
55:
56: /*
57: * set the items on the File sub-menu appropriately
58: */
59: MenuEnableItem(HWNDFROMMP(mp2), IDM_FILEOPEN, (BOOL)!vfMaximized);
60: break;
61:
62: case IDM_VIEW:
63:
64: /*
65: * set the items on the View sub-menu appropriately
66: */
67: if (!vfImgLoaded)
68: MenuEnableItem(HWNDFROMMP(mp2), IDM_VIEWDETAIL, FALSE);
69: else {
70: MenuEnableItem(HWNDFROMMP(mp2), IDM_VIEWDETAIL, TRUE);
71: MenuCheckItem(HWNDFROMMP(mp2), IDM_VIEWDETAIL, vfDetail);
72: }
73:
74: MenuEnableItem(HWNDFROMMP(mp2), IDM_VIEWFOREGROUNDCOLOR,
75: vfImgLoaded);
76:
77: MenuEnableItem(HWNDFROMMP(mp2), IDM_VIEWBACKGROUNDCOLOR,
78: vfImgLoaded);
79:
80: MenuEnableItem(HWNDFROMMP(mp2), IDM_VIEWSAVEPOSITION,
81: (BOOL)(vfImgLoaded && vfDetail));
82:
83: MenuEnableItem(HWNDFROMMP(mp2), IDM_VIEWRESTOREPOSITION,
84: (BOOL)(vfImgLoaded && vfDetail));
85:
86: break;
87:
88: /*
89: * check the currently selected foreground color &
90: * set global variable if previously not set
91: */
92: case IDM_VIEWFOREGROUNDCOLOR:
93: MenuCheckItem(HWNDFROMMP(mp2),
94: MenuGetColorItemId(IDM_VIEWFORECOLORBLACK), TRUE);
95:
96: if (!vhwndViewForeClr)
97: vhwndViewForeClr = HWNDFROMMP(mp2);
98: break;
99:
100: /*
101: * check the currently selected background color &
102: * set global variable if previously not set
103: */
104: case IDM_VIEWBACKGROUNDCOLOR:
105: MenuCheckItem(HWNDFROMMP(mp2),
106: MenuGetColorItemId(IDM_VIEWBACKCOLORBLACK), TRUE);
107:
108: if (!vhwndViewBackClr)
109: vhwndViewBackClr = HWNDFROMMP(mp2);
110: break;
111:
112: case IDM_HELP:
113: /*
114: * Enable or disable the Help menu depending upon whether the
115: * help manager has been enabled
116: */
117: MenuEnableItem(HWNDFROMMP(mp2),
118: IDM_HELPHELPFORHELP, vfHelpEnabled);
119:
120: MenuEnableItem(HWNDFROMMP(mp2),
121: IDM_HELPEXTENDED, vfHelpEnabled);
122:
123: MenuEnableItem(HWNDFROMMP(mp2),
124: IDM_HELPKEYS, vfHelpEnabled);
125:
126: MenuEnableItem(HWNDFROMMP(mp2),
127: IDM_HELPINDEX, vfHelpEnabled);
128:
129: /** REMEMBER: add a case for IDM_HELPTUTORIAL if you include
130: the menu item **/
131:
132: break;
133: }
134:
135: } /* MenuInit() */
136:
137: /****************************************************************\
138: * Get color menu item id
139: *--------------------------------------------------------------
140: *
141: * Name: MenuGetColorItemId(idBase)
142: *
143: * Purpose: Returns ID for the currently selected foreground/
144: * background color value
145: *
146: * Usage: Called whenever either the foreground/background
147: * floating color menu is to be displayed.
148: *
149: * Method:
150: *
151: * Returns:
152: *
153: \****************************************************************/
154: SHORT MenuGetColorItemId(idBase)
155: SHORT idBase; /* Id of the base color for foregrnd/backgrnd color menu */
156: {
157: LONG lColor;
158:
159: if (idBase == IDM_VIEWFORECOLORBLACK)
160: lColor = vlForeClr;
161: else
162: lColor = vlBackClr;
163:
164: /*
165: * calculate menu item id based on current color value
166: */
167: switch ((SHORT)lColor) {
168: case CLR_BLACK:
169: return idBase;
170: break;
171: case CLR_WHITE:
172: return idBase + 1;
173: break;
174: case CLR_BLUE:
175: return idBase + 2;
176: break;
177: case CLR_GREEN:
178: return idBase + 3;
179: break;
180: case CLR_YELLOW:
181: return idBase + 4;
182: break;
183: case CLR_RED:
184: return idBase + 5;
185: break;
186: }
187: } /* MenuGetColorItemId() */
188:
189: /****************************************************************\
190: * Enables/Disables the menu item of the given menu
191: *--------------------------------------------------------------
192: *
193: * Name: MenuEnableItem(hwndMenu, idItem, fEnable)
194: *
195: * Purpose: Enables or disables the menu item
196: *
197: * Usage: Called whenever a menu item is to enabled or
198: * disabled
199: *
200: * Method: Sends a MM_SETITEMATTR to the menu with the
201: * given item id. Sets the MIA_DISABLED attribute
202: * flag if the item is to be disabled, clears the flag
203: * if enabling
204: *
205: * Returns:
206: *
207: \****************************************************************/
208: VOID MenuEnableItem(hwndMenu, idItem, fEnable)
209: HWND hwndMenu; /* Handle to the menu */
210: SHORT idItem; /* Id of the menu item to be enabled/disabled */
211: BOOL fEnable; /* flag to set enable or disable bit */
212: {
213: WinSendMsg(hwndMenu,
214: MM_SETITEMATTR,
215: MPFROM2SHORT(idItem, TRUE),
216: MPFROM2SHORT(MIA_DISABLED,
217: (fEnable ? 0 : MIA_DISABLED)));
218:
219: } /* MenuEnableItem() */
220:
221:
222: /****************************************************************\
223: * Check the menu item of the given menu
224: *--------------------------------------------------------------
225: *
226: * Name: MenuCheckItem(hwndMenu, idItem)
227: *
228: * Purpose: Checks menu item
229: *
230: * Usage: Called whenever a menu item is to checked
231: *
232: * Method: Sends a MM_SETITEMATTR to the menu with the
233: * given item id. Sets the MIA_CHECKED attribute
234: * flag if the item is to be checked
235: *
236: * Returns:
237: *
238: \****************************************************************/
239: VOID MenuCheckItem(hwndMenu, idItem, fCheck)
240: HWND hwndMenu; /* Handle to the menu */
241: SHORT idItem; /* Id of the menu item to be enabled/disabled */
242: BOOL fCheck; /* Check/uncheck item */
243: {
244: WinSendMsg(hwndMenu,
245: MM_SETITEMATTR,
246: MPFROM2SHORT(idItem, TRUE),
247: MPFROM2SHORT(MIA_CHECKED,
248: (fCheck ? MIA_CHECKED : ~MIA_CHECKED)));
249:
250: } /* MenuCheckItem() */
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