第四章 文本输出
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2023-09-20 12:32:39
1 //SYSMETS.H -- System metrics display structure 2 #include 3 4 #define NUMLINES ((int) (sizeof(sysmetrics) / sizeof(sysmetrics[0]))) 5 6 ......
1 //SYSMETS.H -- System metrics display structure
2 #include <Windows.h>
3
4 #define NUMLINES ((int) (sizeof(sysmetrics) / sizeof(sysmetrics[0])))
5
6 struct
7 {
8 int iIndex;
9 TCHAR *szLabel;
10 TCHAR *szDesc;
11 }
12 sysmetrics[] =
13 {
14 SM_CXSCREEN, TEXT("SM_CXSCREEN"), TEXT("Screen width in pixels"),
15 SM_CYSCREEN, TEXT("SM_CYSCREEN"), TEXT("Screen height in pixels"),
16 SM_CXVSCROLL, TEXT("SM_CXVSCROLL"), TEXT("Vertical scroll width"),
17 SM_CYHSCROLL, TEXT("SM_CYHSCROLL"), TEXT("Horizontal scroll height"),
18 SM_CYCAPTION, TEXT("SM_CYCAPTION"), TEXT("Caption bar height"),
19 SM_CXBORDER, TEXT("SM_CXBORDER"), TEXT("Window border width"),
20 SM_CYBORDER, TEXT("SM_CYBORDER"), TEXT("Window border height"),
21 SM_CXFIXEDFRAME, TEXT("SM_CXFIXEDFRAME"), TEXT("Dialog window frame width"),
22 SM_CYFIXEDFRAME, TEXT("SM_CYFIXEDFRAME"), TEXT("Dialog window frame height"),
23 SM_CYVTHUMB, TEXT("SM_CYVTHUMB"), TEXT("Vertical scroll thumb height"),
24 SM_CXHTHUMB, TEXT("SM_CXHTHUMB"), TEXT("Horizontal scroll thumb width"),
25 SM_CXICON, TEXT("SM_CXICON"), TEXT("Icon width"),
26 SM_CYICON, TEXT("SM_CYICON"), TEXT("Icon height"),
27 SM_CXCURSOR, TEXT("SM_CXCURSOR"), TEXT("Cursor width"),
28 SM_CYCURSOR, TEXT("SM_CYCURSOR"), TEXT("Cursor height"),
29 SM_CYMENU, TEXT("SM_CYMENU"), TEXT("Menu bar height"),
30 SM_CXFULLSCREEN, TEXT("SM_CXFULLSCREEN"), TEXT("Full screen client area width"),
31 SM_CYFULLSCREEN, TEXT("SM_CYFULLSCREEN"), TEXT("Full screen client area height"),
32 SM_CYKANJIWINDOW, TEXT("SM_CYKANJIWINDOW"), TEXT("Kanji window height"),
33 SM_MOUSEPRESENT, TEXT("SM_MOUSEPRESENT"), TEXT("Mouse present flag"),
34 SM_CYVSCROLL, TEXT("SM_CYVSCROLL"), TEXT("Vertical scroll arrow height"),
35 SM_CXHSCROLL, TEXT("SM_CXHSCROLL"), TEXT("Horizontal scroll arrow width"),
36 SM_DEBUG, TEXT("SM_DEBUG"), TEXT("Debug version flag"),
37 SM_SWAPBUTTON, TEXT("SM_SWAPBUTTON"), TEXT("Mouse buttons swapped flag"),
38 SM_CXMIN, TEXT("SM_CXMIN"), TEXT("Minimum window width"),
39 SM_CYMIN, TEXT("SM_CYMIN"), TEXT("Minimum window height"),
40 SM_CXSIZE, TEXT("SM_CXSIZE"), TEXT("Min/Max/Close button width"),
41 SM_CYSIZE, TEXT("SM_CYSIZE"), TEXT("Min/Max/Close button height"),
42 SM_CXSIZEFRAME, TEXT("SM_CXSIZEFRAME"), TEXT("Window sizing frame width"),
43 SM_CYSIZEFRAME, TEXT("SM_CYSIZEFRAME"), TEXT("Window sizing frame height"),
44 SM_CXMINTRACK, TEXT("SM_CXMINTRACK"), TEXT("Minimum window tracking width"),
45 SM_CYMINTRACK, TEXT("SM_CYMINTRACK"), TEXT("Minimum window tracking height"),
46 SM_CXDOUBLECLK, TEXT("SM_CXDOUBLECLK"), TEXT("Double click x tolerance"),
47 SM_CYDOUBLECLK, TEXT("SM_CYDOUBLECLK"), TEXT("Double click y tolerance"),
48 SM_CXICONSPACING, TEXT("SM_CXICONSPACING"), TEXT("Horizontal icon spacing"),
49 SM_CYICONSPACING, TEXT("SM_CYICONSPACING"), TEXT("Vertical icon spacing"),
50 SM_MENUDROPALIGNMENT, TEXT("SM_MENUDROPALIGMENT"), TEXT("Left or right menu drop"),
51 SM_PENWINDOWS, TEXT("SM_PENWINDOWS"), TEXT("Pen extensions installed"),
52 SM_DBCSENABLED, TEXT("SM-DBCSENABLED"), TEXT("Double-Byte Char Set enable"),
53 SM_CMOUSEBUTTONS, TEXT("SM_CMOUSEBUTTONS"), TEXT("Number of mouse buttons"),
54 SM_SECURE, TEXT("SM_SECURE"), TEXT("Security present flag"),
55 SM_CXEDGE, TEXT("SM_CXEDGE"), TEXT("3-D border width"),
56 SM_CYEDGE, TEXT("SM_CYEDGE"), TEXT("3-D border height"),
57 SM_CXMINSPACING, TEXT("SM_CXMINSPACING"), TEXT("Minimized window spacing width"),
58 SM_CYMINSPACING, TEXT("SM-CYMINSPACING"), TEXT("Minimized window spacing height"),
59 SM_CXSMICON, TEXT("SM_CXSMICON"), TEXT("Small icon width"),
60 SM_CYSMICON, TEXT("SM_CYSMICON"), TEXT("Small icon height"),
61 SM_CYSMCAPTION, TEXT("SM_CYSMCAPTION"), TEXT("Small caption height"),
62 SM_CXSMSIZE, TEXT("SM_CXSMSIZE"), TEXT("Small caption button width"),
63 SM_CYSMSIZE, TEXT("SM_CYSMSIZE"), TEXT("Small caption button height"),
64 SM_CXMENUSIZE, TEXT("SM_CXMENUSIZE"), TEXT("Menu bar button width"),
65 SM_CYMENUSIZE, TEXT("SM_CYMENUSIZE"), TEXT("Menu bar button height"),
66 SM_ARRANGE, TEXT("SM_ARRANGE"), TEXT("How minimized windows arranged"),
67 SM_CXMINIMIZED, TEXT("SM_CXMINIMIZED"), TEXT("Minimized window width"),
68 SM_CYMINIMIZED, TEXT("SM_CYMINIMIZED"), TEXT("Minimized window height"),
69 SM_CXMAXTRACK, TEXT("SM_CXMAXTRACK"), TEXT("Maximum draggable width"),
70 SM_CYMAXTRACK, TEXT("SM_CYMAXTRACK"), TEXT("Maximum draggable height"),
71 SM_CXMAXIMIZED, TEXT("SM_CXMAXIMIZED"), TEXT("Width of maximized window"),
72 SM_CYMAXIMIZED, TEXT("SM_CYMAXIMIZED"), TEXT("Height of maximized windwo"),
73 SM_NETWORK, TEXT("SM_NETWORK"), TEXT("Network present flag"),
74 SM_CLEANBOOT, TEXT("SM_CLEANBOOT"), TEXT("How system was booted"),
75 SM_CXDRAG, TEXT("SM_CXDRAG"), TEXT("Avoid drag x tolerance"),
76 SM_CYDRAG, TEXT("SM_CYDRAG"), TEXT("Avoid drag x tolerance"),
77 SM_SHOWSOUNDS, TEXT("SM_SHOWSOUNDS"), TEXT("Present sounds visually"),
78 SM_CXMENUCHECK, TEXT("SM_CXMENUCHECK"), TEXT("Menu check-mark width"),
79 SM_CYMENUCHECK, TEXT("SM_CYMENUCHECK"), TEXT("Menu check-mark height"),
80 SM_SLOWMACHINE, TEXT("SM_SLOWMACHINE"), TEXT("Slow processor flag"),
81 SM_MIDEASTENABLED, TEXT("SM_MIDEASTENABLE"), TEXT("Hebrew and Arabic enabled flag"),
82 SM_MOUSEWHEELPRESENT, TEXT("SM_MOUSEWHEELPRESENT"), TEXT("Mouse wheel present flag"),
83 SM_XVIRTUALSCREEN, TEXT("SM_XVIRTUALSCREEN"), TEXT("Virtual screen x origin"),
84 SM_YVIRTUALSCREEN, TEXT("SM_YVIRTUALSCREEN"), TEXT("Virtual screen y origin"),
85 SM_CXVIRTUALSCREEN, TEXT("SM_CXVIRTUALSCREEN"), TEXT("Virtual screen width"),
86 SM_CYVIRTUALSCREEN, TEXT("SM_CYVIRTUALSCREEN"), TEXT("Virtual screen height"),
87 SM_CMONITORS, TEXT("SM_CMONITORS"), TEXT("Number of monitors"),
88 SM_SAMEDISPLAYFORMAT, TEXT("SM_SAMEDISPLAYFORMAT"), TEXT("Same color format flag")
89 };
1 //SYSMETS3.C--System Metrics Display Program No.3(c) Charles Petzold, 1998
2 #include <Windows.h>
3 #include "SYSMETS.h"
4
5 LRESULT CALLBACK WndPorc(HWND, UINT, WPARAM, LPARAM);
6
7 int WINAPI WinMain( __in HINSTANCE hInstance
8 , __in_opt HINSTANCE hPrevInstance
9 , __in LPSTR lpCmdLine
10 , __in int nShowCmd )
11 {
12 static TCHAR szAppName[] = TEXT("Sysmets3");
13 HWND hwnd;
14 MSG msg;
15 WNDCLASS wndclass;
16
17 wndclass.style = CS_HREDRAW | CS_VREDRAW;
18 wndclass.lpfnWndProc = WndPorc;
19 wndclass.cbClsExtra = 0;
20 wndclass.cbWndExtra = 0;
21 wndclass.hInstance = hInstance;
22 wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
23 wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
24 wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
25 wndclass.lpszClassName = szAppName;
26 wndclass.lpszMenuName = NULL;
27
28 if (!RegisterClass(&wndclass))
29 {
30 MessageBox(NULL, TEXT("Program requires windows NT!")
31 , szAppName, MB_ICONERROR);
32 return 0;
33 }
34
35 hwnd = CreateWindow(szAppName, TEXT("Get System Metrics No.3")
36 , WS_OVERLAPPEDWINDOW | WS_VSCROLL | WS_HSCROLL
37 , CW_USEDEFAULT, CW_USEDEFAULT
38 , CW_USEDEFAULT, CW_USEDEFAULT
39 , NULL, NULL, hInstance, NULL);
40
41 ShowWindow(hwnd, nShowCmd);
42 UpdateWindow(hwnd);
43
44 while (GetMessage(&msg, hwnd, 0, 0))
45 {
46 TranslateMessage(&msg);
47 DispatchMessage(&msg);
48 }
49
50 return msg.wParam;
51 }
52
53 LRESULT CALLBACK WndPorc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
54 {
55 static int cxChar, cxCaps, cyChar, cxClient, cyClient, iMaxWidth;
56 HDC hdc;
57 int i, x, y, iVertPos, iHorzPos, iPaintBeg, iPaintEnd;
58 PAINTSTRUCT ps;
59 SCROLLINFO si;
60 TCHAR szBuffer[10];
61 TEXTMETRIC tm;
62
63 switch (message)
64 {
65 case WM_CREATE:
66 hdc = GetDC(hwnd);
67 GetTextMetrics(hdc, &tm);
68 cxChar = tm.tmAveCharWidth;
69 cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;
70 cyChar = tm.tmHeight + tm.tmExternalLeading;
71 ReleaseDC(hwnd, hdc);
72
73 //save the width of the three columns
74 iMaxWidth = 40 * cxChar + 22 * cxCaps;
75 return 0;
76
77 case WM_SIZE:
78 cxClient = LOWORD(lParam);
79 cyClient = HIWORD(lParam);
80
81 //set vertical scroll bar range and page size
82 si.cbSize = sizeof(SCROLLINFO);
83 si.fMask = SIF_RANGE | SIF_PAGE;
84 si.nMin = 0;
85 si.nMax = NUMLINES - 1;
86 si.nPage = cyClient / cyChar;
87 SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
88
89 //set horizontal scroll bar range and page size
90 si.cbSize = sizeof(SCROLLINFO);
91 si.fMask = SIF_RANGE | SIF_PAGE;
92 si.nMin = 0;
93 si.nMax = iMaxWidth / cxChar;
94 si.nPage = cxClient / cxChar;
95 SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
96
97 return 0;
98
99 case WM_VSCROLL:
100 //get all the vertical scroll bar information
101 si.cbSize = sizeof(SCROLLINFO);
102 si.fMask = SIF_ALL;
103 GetScrollInfo(hwnd, SB_VERT, &si);
104
105 //save the position for comparison later on
106 iVertPos = si.nPos;
107
108 switch (LOWORD(wParam))
109 {
110 case SB_TOP:
111 si.nPos = si.nMin;
112 break;
113 case SB_BOTTOM:
114 si.nPos = si.nMax;
115 break;
116 case SB_LINEUP:
117 si.nPos -= 1;
118 break;
119 case SB_LINEDOWN:
120 si.nPos += 1;
121 break;
122 case SB_PAGEUP:
123 si.nPos -= si.nPage;
124 break;
125 case SB_PAGEDOWN:
126 si.nPos += si.nPage;
127 break;
128 case SB_THUMBTRACK:
129 si.nPos = si.nTrackPos;
130 break;
131 default:
132 break;
133 }
134
135 //set the position and then retrieve it. Due to adjustments
136 //by windows it may not be the same as the value set.
137 si.fMask = SIF_POS;
138 SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
139 GetScrollInfo(hwnd, SB_VERT, &si);
140
141 //if the position has changed, scroll the window and update it
142 if (si.nPos != iVertPos)
143 {
144 ScrollWindow(hwnd, 0, cyChar * (iVertPos - si.nPos)
145 , NULL, NULL);
146 UpdateWindow(hwnd);
147 }
148
149 return 0;
150
151 case WM_HSCROLL:
152 //get all the vertical scroll bar information
153 si.cbSize = sizeof(SCROLLINFO);
154 si.fMask = SIF_ALL;
155
156 //save the position for comparison later on
157 GetScrollInfo(hwnd, SB_HORZ, &si);
158 iHorzPos = si.nPos;
159
160 switch (LOWORD(wParam))
161 {
162 case SB_LINELEFT:
163 si.nPos -= 1;
164 break;
165 case SB_LINERIGHT:
166 si.nPos += 1;
167 break;
168 case SB_PAGELEFT:
169 si.nPos -= si.nPage;
170 break;
171 case SB_PAGERIGHT:
172 si.nPos += si.nPage;
173 case SB_THUMBPOSITION:
174 si.nPos = si.nTrackPos;
175 break;
176 default:
177 break;
178 }
179
180 //set the position and then retrieve it. Due to adjustments
181 //by windows it may not be the same as the value set.
182 si.fMask = SIF_POS;
183 SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
184 GetScrollInfo(hwnd, SB_HORZ, &si);
185
186 //if the position has changed, scroll the window
187 if (si.nPos != iHorzPos)
188 {
189 ScrollWindow(hwnd, cxChar * (iHorzPos - si.nPos)
190 , 0, NULL, NULL);
191 }
192
193 return 0;
194
195 case WM_PAINT:
196 hdc = BeginPaint(hwnd, &ps);
197
198 //get vertical scroll bar position
199 si.cbSize = sizeof(SCROLLINFO);
200 si.fMask = SIF_POS;
201 GetScrollInfo(hwnd, SB_VERT, &si);
202 iVertPos = si.nPos;
203
204 //get horizontal scroll bar position
205 GetScrollInfo(hwnd, SB_HORZ, &si);
206 iHorzPos = si.nPos;
207
208 //find painting limits
209 iPaintBeg = max(0, iVertPos + ps.rcPaint.top / cyChar);
210 iPaintEnd = min(NUMLINES - 1, iVertPos + ps.rcPaint.bottom / cyChar);
211
212 for (i = iPaintBeg; i <= iPaintEnd; ++i)
213 {
214 x = cxChar * (1 - iHorzPos);
215 y = cyChar * (i - iVertPos);
216
217 TextOut(hdc, x, y, sysmetrics[i].szLabel
218 , lstrlen(sysmetrics[i].szLabel));
219
220 TextOut(hdc, x + 22 * cxCaps, y
221 , sysmetrics[i].szDesc, lstrlen(sysmetrics[i].szDesc));
222
223 SetTextAlign(hdc, TA_RIGHT | TA_TOP);
224
225 TextOut(hdc, x + 22 * cxCaps + 40 * cxChar, y, szBuffer
226 , wsprintf(szBuffer, TEXT("%5d"), GetSystemMetrics(sysmetrics[i].iIndex)));
227
228 SetTextAlign(hdc, TA_LEFT | TA_TOP);
229 }
230
231 EndPaint(hwnd, &ps);
232 return 0;
233
234 case WM_DESTROY:
235 PostQuitMessage(0);
236 return 0;
237 }
238
239 return DefWindowProc(hwnd, message, wParam, lParam);
240 }