第四章 文本输出

 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 };

SYSMETS.H

  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 }

SYSMETS3.C