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1.1 root 1: /*==============================================================*\
2: * img_view.c - routines for handling the View menu functions
3: * Created 1989, 1990 IBM, Microsoft Corp.
4: *--------------------------------------------------------------*
5: *
6: * This module contains the code for handling the functions
7: * offered on the View submenu. These functions are called
8: * from the MainCommand() routine.
9: *
10: *--------------------------------------------------------------*
11: *
12: * This source file contains the following functions:
13: *
14: * ViewSwitchMode()
15: * ViewChangeColor()
16: * ViewSavePosition()
17: * ViewRestorePosition()
18: *
19: \*==============================================================*/
20: /*--------------------------------------------------------------*\
21: * Include files, macros, defined constants, and externs *
22: \*--------------------------------------------------------------*/
23: #define INCL_WINSCROLLBARS
24: #define INCL_WINFRAMEMGR
25: #define INCL_GPIPRIMITIVES
26:
27: /*--------------------------------------------------------------*\
28: * Include files, macros, defined constants, and externs *
29: \*--------------------------------------------------------------*/
30: #include <os2.h>
31: #include <stdlib.h>
32: #include "img_main.h"
33: #include "img_xtrn.h"
34: #include "img_dlg.h"
35:
36: /*--------------------------------------------------------------*\
37: * Static variables *
38: \*--------------------------------------------------------------*/
39: /* foreground/background color choices */
40: LONG lColorArray[COLOR_COUNT] = {CLR_BLACK,
41: CLR_WHITE,
42: CLR_BLUE,
43: CLR_GREEN,
44: CLR_YELLOW,
45: CLR_RED};
46:
47: /****************************************************************\
48: * Switch Modes (Non-Detail <-> Detail) procedure
49: *--------------------------------------------------------------
50: *
51: * Name: ViewSwitchMode()
52: *
53: * Purpose: Toggles the mode of the application from Non-Detail
54: * to Detail mode and visa versa
55: *
56: * Usage: Routine is called whenever a WM_COMMAND message
57: * is posted to the main window in response to
58: * the user (de)selecting the Detail item
59: * from the View submenu
60: *
61: * Method: Since Non-Detail mode is the opposite to Detail mode
62: * toggle the menu settings, and ownership of the
63: * scrollbars, and redraw. If entering Detail mode
64: * it is necessary to size the main window aswell.
65: *
66: * Returns:
67: *
68: \****************************************************************/
69: VOID ViewSwitchMode()
70: {
71:
72: vfDetail = !vfDetail;
73:
74: /*
75: * detach/attach scrollbars to main window accordingly
76: */
77: WinSetParent(vhwndVScroll,
78: vfDetail ? vhwndFrame : HWND_OBJECT,
79: FALSE);
80: WinSetParent(vhwndHScroll,
81: vfDetail ? vhwndFrame : HWND_OBJECT,
82: FALSE);
83:
84: WinSendMsg(vhwndFrame,
85: WM_UPDATEFRAME,
86: MPFROMLONG(FCF_VERTSCROLL | FCF_HORZSCROLL),
87: 0L);
88:
89: /* resize main window if in 'Detail' mode */
90: if (vfDetail)
91: SizeMainWindow();
92:
93: WinInvalidateRect(vhwndClient, (PRECTL)NULL, FALSE);
94:
95: } /* ViewSwitchMode() */
96:
97: /****************************************************************\
98: * Change Color Routine
99: *--------------------------------------------------------------
100: *
101: * Name: ViewChangeColor()
102: *
103: * Purpose: To change the foreground/background colors of the
104: * selected image
105: *
106: * Usage: Routine is called whenever a WM_COMMAND message
107: * is posted to the main window in response to
108: * the user selecting a Color item from either the
109: * 'Foreground'/'Background' Color items on the View submenu
110: *
111: * Method:
112: *
113: * Returns:
114: *
115: \****************************************************************/
116: VOID ViewChangeColor(idColor)
117: USHORT idColor;
118: {
119: LONG lForeClr, lBackClr;
120: BOOL fSameClr;
121: USHORT idItem;
122:
123: /*
124: * change either the foreground/background color and save
125: * previous settings so that the appropriate menuitem can
126: * be reset
127: */
128: if (idColor < IDM_VIEWBACKCOLORBLACK) {
129: lForeClr = lColorArray[idColor - COLOR_BASE];
130: fSameClr = (lForeClr == vlBackClr);
131: idItem = MenuGetColorItemId(IDM_VIEWFORECOLORBLACK);
132: } else {
133: lBackClr = lColorArray[idColor - COLOR_BASE - COLOR_COUNT];
134: fSameClr = (lBackClr == vlForeClr);
135: idItem = MenuGetColorItemId(IDM_VIEWBACKCOLORBLACK);
136: }
137: /*
138: * if background color is the same as the foreground color
139: * - ensure this is correct and get out if not
140: */
141: if (fSameClr) {
142: if (MessageBox(vhwndFrame,
143: IDMSG_BACKEQFORE, IDMSG_WARNING,
144: MB_APPLMODAL | MB_YESNO | MB_CUAWARNING,
145: TRUE) == MBID_NO)
146: return;
147: }
148:
149: /* cancel previously checked item & save new values */
150: if (idColor < IDM_VIEWBACKCOLORBLACK) {
151: MenuCheckItem(vhwndViewForeClr, idItem, FALSE);
152: vlForeClr = lForeClr;
153: } else {
154: MenuCheckItem(vhwndViewBackClr, idItem, FALSE);
155: vlBackClr = lBackClr;
156: }
157:
158: /*
159: * set colors appropriately and force redraw
160: */
161: GpiSetBackColor(vhps, vlBackClr);
162: GpiSetColor(vhps, vlForeClr);
163: GpiSetBackMix(vhps, BM_OVERPAINT);
164: WinInvalidateRect(vhwndClient, (PRECTL)NULL, FALSE);
165:
166: } /* ViewChangeColor() */
167:
168: /****************************************************************\
169: * Restore Image Position Routine
170: *--------------------------------------------------------------
171: *
172: * Name: ViewRestorePosition()
173: *
174: * Purpose: To restore the saved position of the image
175: *
176: * Usage: Routine is called whenever a WM_COMMAND message
177: * is posted to the main window in response to
178: * the user selecting the Restore Position item or the
179: * from the View submenu
180: *
181: * Method:
182: *
183: * Returns:
184: *
185: \****************************************************************/
186: VOID ViewRestorePosition()
187: {
188: RECTL rcl;
189:
190: /* only valid if image is loaded & in Detail mode */
191: if (vfImgLoaded && vfDetail) {
192: WinQueryWindowRect(vhwndClient, &rcl);
193: GpiSetCurrentPosition(vhps, &vptlSave);
194: WinSendMsg(vhwndVScroll,
195: SBM_SETPOS,
196: MPFROMLONG(vptlSave.y - rcl.yTop),
197: 0L);
198: WinSendMsg(vhwndHScroll,
199: SBM_SETPOS,
200: MPFROMLONG(labs(vptlSave.x)),
201: 0L);
202: WinInvalidateRect(vhwndClient, (PRECTL)NULL, FALSE);
203: }
204:
205: } /* ViewRestorePosition() */
206:
207: /****************************************************************\
208: * Save Image Position Routine
209: *--------------------------------------------------------------
210: *
211: * Name: ViewSavePosition()
212: *
213: * Purpose: To save the current position of the image
214: *
215: * Usage: Routine is called whenever a WM_COMMAND message
216: * is posted to the main window in response to
217: * the user selecting the Save Position item or the
218: * from the View submenu
219: *
220: * Method:
221: *
222: * Returns:
223: *
224: \****************************************************************/
225: VOID ViewSavePosition()
226: {
227: if (vfImgLoaded && vfDetail)
228: GpiQueryCurrentPosition(vhps, &vptlSave);
229:
230: } /* ViewSavePosition() */
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