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1.1 root 1: #include <windows.h>
2: #include <stdio.h>
3: #include "console.h"
4:
1.1.1.2 ! root 5: /* Microsoft Developer Support
! 6: Copyright (c) 1992 Microsoft Corporation */
! 7:
1.1 root 8: /*********************************************************************
9: * FUNCTION: demoCreate(HANDLE hConOld) *
10: * *
11: * PURPOSE: demonstrate CreateConsoleScreenBuffer, *
12: * SetConsoleTextAttribute, and *
13: * SetConsoleActiveScreenBuffer. Create a 'help' screen on a *
14: * new buffer and quickly switch between the main buffer and *
15: * the help buffer on command without redrawing the entire *
16: * screens. SetConsoleTextAttribute will be used to make the *
17: * help screen a different color. *
18: * *
19: * INPUT: the output handle to write to *
20: **********************************************************************/
21:
22: void demoCreate(HANDLE hConOld)
23: {
24: BOOL bSuccess;
25: HANDLE hConHelp; /* console for the help screen */
26: COORD dwWriteCoord = {0, 0}; /* where to write the screen attributes */
27: DWORD cCharsWritten;
28: HANDLE hStdIn; /* standard input handle */
29: CHAR c = 0; /* virtual key code that we will read */
30: HANDLE hConCurrent; /* keep track of the current visible console buffer */
31: INPUT_RECORD inputBuf; /* console input event record */
32: DWORD cInputEvents;
33:
34: setConTitle(__FILE__);
35: myPuts(hConOld, "Let's create a help screen in another buffer. Then\n"
36: "when the user hits F1, we can easily flip to the help\n"
37: "screen and back without recreating the text on the\n"
38: "screens by simply changing the active buffer.\n"
39: "We'll change the default text attribute with\n"
40: "SetConsoleTextAttribute before creating the help screen\n"
41: "so that the sample text is in a different color.\n"
42: "Hit F1 now for help, and esc to return here.\n"
43: "Hit esc from this screen to return to API list.");
44: /* create a separate console buffer for the help screen */
45: hConHelp = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE,
46: FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CONSOLE_TEXTMODE_BUFFER,
47: NULL);
1.1.1.2 ! root 48: PERR(hConHelp != INVALID_HANDLE_VALUE, "CreateConsoleScreenBuffer");
1.1 root 49: /* change the color of the help screen */
50: bSuccess = FillConsoleOutputAttribute(hConHelp, BACKGROUND_BLUE,
51: getConX(hConHelp) * getConY(hConHelp), dwWriteCoord, &cCharsWritten);
52: PERR(bSuccess, "FillConsoleOutputAttribute");
53: /* set the color for future text output */
54: bSuccess = SetConsoleTextAttribute(hConHelp, FOREGROUND_YELLOW |
55: FOREGROUND_INTENSITY | BACKGROUND_BLUE);
56: PERR(bSuccess, "SetConsoleTextAttribute");
57: myPuts(hConHelp, " S u p e r D u p e r B a s e H e l p\n"
58: "\n\n F1: search F6: window\n"
59: " F2: extract F7: initialize\n"
60: " F3: sort F8: exit\n"
61: " F4: query F9: save\n"
62: " F5: execute F10: explode\n"
63: " ESC: exit help");
64: hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1.1.1.2 ! root 65: PERR(hStdIn != INVALID_HANDLE_VALUE, "GetStdHandle");
1.1 root 66: /* keep track of the currently visible console */
67: hConCurrent = hConOld;
68: /* switch between the help and previous buffer when user hits F1 or ESC */
69: for(;;)
70: {
71: do
72: {
73: /* throw away any non-keystroke events or any key-up events */
74: bSuccess = ReadConsoleInput(hStdIn, &inputBuf, 1, &cInputEvents);
75: PERR(bSuccess, "ReadConsoleInput");
76: } while (inputBuf.EventType != KEY_EVENT ||
77: !inputBuf.Event.KeyEvent.bKeyDown);
78: /* get the virtual scan code of the key-down event */
79: c = (char) inputBuf.Event.KeyEvent.wVirtualKeyCode;
80: switch(c)
81: {
82: case VK_F1:
83: /* if the current buffer is the original buffer, switch to the */
84: /* help buffer */
85: if (hConCurrent == hConOld)
86: {
87: bSuccess = SetConsoleActiveScreenBuffer(hConHelp);
88: PERR(bSuccess, "SetConsoleActiveScreenBuffer");
89: hConCurrent = hConHelp;
90: }
91: break;
92: case VK_ESCAPE:
93: /* if the current buffer is the help buffer, switch to the */
94: /* original buffer. Otherwise, clean up and return */
95: if (hConCurrent == hConHelp)
96: {
97: bSuccess = SetConsoleActiveScreenBuffer(hConOld);
98: PERR(bSuccess, "SetConsoleActiveScreenBuffer");
99: hConCurrent = hConOld;
100: }
101: else
102: {
103: CloseHandle(hConHelp);
104: return;
105: }
106: break;
107: case VK_F10:
108: if (hConCurrent == hConHelp)
109: myPuts(hConHelp, "BOOM!");
110: break;
111: default:
112: break;
113: } /* switch */
114: } /* while */
115: return;
116: }
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