![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to demo.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [WindowsNT SDKs] / mstools / samples / select|
Return to demo.c CVS log | Up to [WindowsNT SDKs] / mstools / samples / select |
1.1 root 1: /****************************************************************************
2:
3: PROGRAM: Demo.c
4:
5: PURPOSE: Demonstrates how to manipulate a cursor and select a region
6:
7: FUNCTIONS:
8:
9: WinMain() - calls initialization function, processes message loop
10: DemoInit() - initializes window data and registers window
11: DemoWndProc() - processes messages
12: About() - processes messages for "About" dialog box
13:
14: COMMENTS:
15: This code is a modified version of the CURSOR.C program. Instead of
16: using inline code for drawing the shape, the routines from the Select
17: library are called.
18:
19: ****************************************************************************/
20:
21: #include "windows.h"
22:
23: #include "demo.h"
24: #include "select.h"
25:
26: HANDLE hInst;
27: BOOL bTrack = FALSE;
28: INT OrgX = 0, OrgY = 0;
29: INT PrevX = 0, PrevY = 0;
30: INT X = 0, Y = 0;
31:
32: RECT Rect;
33:
34: INT Shape = SL_BLOCK; /* Shape to use for rectangle */
35: BOOL RetainShape = FALSE; /* Retain or destroy shape */
36:
37: int APIENTRY WinMain(HANDLE hInstance,
38: HANDLE hPrevInstance,
39: LPSTR lpCmdLine,
40: int nCmdShow)
41: {
42:
43: HWND hWnd;
44: MSG msg;
45:
46: UNREFERENCED_PARAMETER(lpCmdLine);
47:
48: if (!hPrevInstance)
49: if (!DemoInit(hInstance))
50: return (NULL);
51:
52: hInst = hInstance;
53:
54: hWnd = CreateWindow("Demo",
55: "Demo Sample Application",
56: WS_OVERLAPPEDWINDOW,
57: CW_USEDEFAULT,
58: CW_USEDEFAULT,
59: CW_USEDEFAULT,
60: CW_USEDEFAULT,
61: NULL,
62: NULL,
63: hInstance,
64: NULL);
65:
66: if (!hWnd)
67: return (NULL);
68:
69: ShowWindow(hWnd, nCmdShow);
70: UpdateWindow(hWnd);
71:
72: while (GetMessage(&msg, NULL, NULL, NULL)) {
73: TranslateMessage(&msg);
74: DispatchMessage(&msg);
75: }
76: return (msg.wParam);
77: }
78:
79: /****************************************************************************
80:
81: FUNCTION: DemoInit(HANDLE)
82:
83: PURPOSE: Initializes window data and registers window class
84:
85: ****************************************************************************/
86:
87: BOOL DemoInit(HANDLE hInstance)
88: {
89: HANDLE hMemory;
90: PWNDCLASS pWndClass;
91: BOOL bSuccess;
92:
93: hMemory = LocalAlloc(LPTR, sizeof(WNDCLASS));
94: if(!hMemory){
95: MessageBox(NULL, "<DemoInit> Not enough memory.", NULL, MB_OK | MB_ICONHAND);
96: return(FALSE);
97: }
98:
99: pWndClass = (PWNDCLASS) LocalLock(hMemory);
100: pWndClass->hCursor = LoadCursor(NULL, IDC_ARROW);
101: pWndClass->hIcon = LoadIcon(NULL, IDI_APPLICATION);
102: pWndClass->lpszMenuName = (LPSTR) "Menu";
103: pWndClass->lpszClassName = (LPSTR) "Demo";
104: pWndClass->hbrBackground = GetStockObject(WHITE_BRUSH);
105: pWndClass->hInstance = hInstance;
106: pWndClass->style = NULL;
107: pWndClass->lpfnWndProc = (WNDPROC)DemoWndProc;
108:
109: bSuccess = RegisterClass(pWndClass);
110:
111: LocalUnlock(hMemory);
112: LocalFree(hMemory);
113: return (bSuccess);
114: }
115:
116: /****************************************************************************
117:
118: FUNCTION: DemoWndProc(HWND, unsigned, WORD, LONG)
119:
120: PURPOSE: Processes messages
121:
122: MESSAGES:
123:
124: WM_SYSCOMMAND - system menu (About dialog box)
125: WM_CREATE - create window
126: WM_DESTROY - destroy window
127: WM_LBUTTONDOWN - left mouse button
128: WM_MOUSEMOVE - mouse movement
129: WM_LBUTTONUP - left button released
130:
131: WM_COMMAND messages:
132: IDM_BOX - use inverted box for selecting a region
133: IDM_BLOCK - use empty box for selecting a region
134: IDM_RETAIN - retain/delete selection on button release
135:
136: COMMENTS:
137:
138: When the left mouse button is pressed, btrack is set to TRUE so that
139: the code for WM_MOUSEMOVE will keep track of the mouse and update the
140: box accordingly. Once the button is released, btrack is set to
141: FALSE, and the current position is saved. Holding the SHIFT key
142: while pressing the left button will extend the current box rather
143: then erasing it and starting a new one. The exception is when the
144: retain shape option is enabled. With this option, the rectangle is
145: zeroed whenever the mouse is released so that it can not be erased or
146: extended.
147:
148: ****************************************************************************/
149:
150: LONG APIENTRY DemoWndProc(
151: HWND hWnd,
152: UINT message,
153: UINT wParam,
154: LONG lParam)
155: {
156: FARPROC lpProcAbout;
157: HMENU hMenu;
158:
159: switch (message) {
160:
161: case WM_COMMAND:
162:
163: // LOWORD added for portability
164:
165: switch (LOWORD(wParam)) {
166: case IDM_BOX:
167: Shape = SL_BOX;
168: hMenu = GetMenu(hWnd);
169: CheckMenuItem(hMenu, IDM_BOX, MF_CHECKED);
170: CheckMenuItem(hMenu, IDM_BLOCK, MF_UNCHECKED);
171: break;
172:
173: case IDM_BLOCK:
174: Shape = SL_BLOCK;
175: hMenu = GetMenu(hWnd);
176: CheckMenuItem(hMenu, IDM_BOX, MF_UNCHECKED);
177: CheckMenuItem(hMenu, IDM_BLOCK, MF_CHECKED);
178: break;
179:
180: case IDM_RETAIN:
181: if (RetainShape) {
182: hMenu = GetMenu(hWnd);
183: CheckMenuItem(hMenu, IDM_RETAIN, MF_UNCHECKED);
184: RetainShape = FALSE;
185: }
186: else {
187: hMenu = GetMenu(hWnd);
188: CheckMenuItem(hMenu, IDM_RETAIN, MF_CHECKED);
189: RetainShape = TRUE;
190: }
191: break;
192:
193: case IDM_ABOUT:
194: lpProcAbout = MakeProcInstance((FARPROC)About, hInst);
1.1.1.2 ! root 195: DialogBox(hInst, "AboutBox", hWnd, (DLGPROC)lpProcAbout);
1.1 root 196: FreeProcInstance(lpProcAbout);
197: break;
198:
199: }
200: break;
201:
202: case WM_LBUTTONDOWN:
203:
204: bTrack = TRUE; /* user has pressed the left button */
205:
206: /* If you don't want the shape cleared, you must clear the Rect
207: * coordinates before calling StartSelection
208: */
209:
210: if (RetainShape)
211: SetRectEmpty(&Rect);
212:
213: StartSelection(hWnd, MAKEMPOINT(lParam), &Rect,
214: (wParam & MK_SHIFT) ? SL_EXTEND | Shape : Shape);
215: break;
216:
217: case WM_MOUSEMOVE:
218: if (bTrack)
219: UpdateSelection(hWnd, MAKEMPOINT(lParam), &Rect, Shape);
220: break;
221:
222: case WM_LBUTTONUP:
223: if (bTrack)
224: EndSelection(MAKEMPOINT(lParam), &Rect);
225: bTrack = FALSE;
226: break;
227:
228: case WM_SIZE:
229: switch (wParam) {
230: case SIZEICONIC:
231:
232: /* If we aren't in retain mode we want to clear the
233: * current rectangle now!
234: */
235: if (!RetainShape)
236: SetRectEmpty(&Rect);
237: }
238: break;
239:
240: case WM_DESTROY:
241: PostQuitMessage(NULL);
242: break;
243:
244: default:
245: return (DefWindowProc(hWnd, message, wParam, lParam));
246: }
247: return (NULL);
248: }
249:
250: /****************************************************************************
251:
252: FUNCTION: About(HWND, unsigned, WORD, LONG)
253:
254: PURPOSE: Processes messages for "About" dialog box
255:
256: MESSAGES:
257:
258: WM_INITDIALOG - initialize dialog box
259: WM_COMMAND - Input received
260:
261: ****************************************************************************/
262:
263: BOOL APIENTRY About(
264: HWND hDlg,
265: UINT message,
266: UINT wParam,
267: LONG lParam)
268: {
269: switch (message) {
270: case WM_INITDIALOG:
271: return (TRUE);
272:
273: case WM_COMMAND:
274: // LOWORD added for portability
275: if (LOWORD(wParam) == IDOK
276: || LOWORD(wParam) == IDCANCEL) {
277: EndDialog(hDlg, TRUE);
278: return (TRUE);
279: }
280: return (TRUE);
281: }
282: return (FALSE);
283: UNREFERENCED_PARAMETER(lParam);
284: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.