windows程序设计读书笔记2——字符显示1
本程序使用GetSystemMetrics获取windows各种图像选项，并输出字符到窗口中。
#define WINVER 0x0500
#include <windows.h>
#include "sysmets.h" LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("SysMets1") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = ;
wndclass.cbWndExtra = ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return ;
} hwnd = CreateWindow (szAppName, TEXT ("Get System Metrics No. 1"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, , ))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
} LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxChar, cxCaps, cyChar ;
HDC hdc ;
int i ;
PAINTSTRUCT ps ;
TCHAR szBuffer [] ;
TEXTMETRIC tm ; switch (message)
{
case WM_CREATE:
hdc = GetDC (hwnd) ; GetTextMetrics (hdc, &tm) ;
cxChar = tm.tmAveCharWidth ; // 平均字符宽度
cxCaps = (tm.tmPitchAndFamily & ? : ) * cxChar / ; // 字体间距(低4位)和族(高4位)
cyChar = tm.tmHeight + tm.tmExternalLeading ; // 字符高度 + 夹在两行之间的空间数目 ReleaseDC (hwnd, hdc) ;
return ; case WM_PAINT :
hdc = BeginPaint (hwnd, &ps) ; for (i = ; i < NUMLINES ; i++)
{
TextOut (hdc, , cyChar * i,
sysmetrics[i].szLabel,
lstrlen (sysmetrics[i].szLabel)) ; TextOut (hdc, * cxCaps, cyChar * i,
sysmetrics[i].szDesc,
lstrlen (sysmetrics[i].szDesc)) ; SetTextAlign (hdc, TA_RIGHT | TA_TOP) ; TextOut (hdc, * cxCaps + * cxChar, cyChar * i, szBuffer,
wsprintf (szBuffer, TEXT ("%5d"),
GetSystemMetrics (sysmetrics[i].iIndex))) ; SetTextAlign (hdc, TA_LEFT | TA_TOP) ;
}
EndPaint (hwnd, &ps) ;
return ; case WM_DESTROY :
PostQuitMessage () ;
return ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
在创建窗口时使用GetTextMetrics函数获取用户界面尺寸，获取设备上下文，包括字符宽度、高度等。
关于TEXTMETRIC结构体，定义如下：
typedef struct tagTEXTMETRIC {
LONG tmHeight;
LONG tmAscent;
LONG tmDescent;
LONG tmInternalLeading;
LONG tmExternalLeading;
LONG tmAveCharWidth;
LONG tmMaxCharWidth;
LONG tmWeight;
LONG tmOverhang;
LONG tmDigitizedAspectX;
LONG tmDigitizedAspectY;
TCHAR tmFirstChar;
TCHAR tmLastChar;
TCHAR tmDefaultChar;
TCHAR tmBreakChar;
BYTE tmItalic;
BYTE tmUnderlined;
BYTE tmStruckOut;
BYTE tmPitchAndFamily;
BYTE tmCharSet;
} TEXTMETRIC, *PTEXTMETRIC;
在绘图时，使用GetSystemMetrics获取系统图形信息，再调用TextOut函数输出文本至窗口。
int WINAPI GetSystemMetrics(
__in int nIndex
);
这里我们在头文件定义了sysmetrics数组，把需要得到的系统数据或者系统配置信息名称写好。
/*-----------------------------------------------
SYSMETS.H -- System metrics display structure
-----------------------------------------------*/ #define NUMLINES ((int) (sizeof sysmetrics / sizeof sysmetrics [0])) struct
{
int iIndex ;
TCHAR * szLabel ;
TCHAR * szDesc ;
}
sysmetrics [] =
{
SM_CXSCREEN, TEXT ("SM_CXSCREEN"),
TEXT ("Screen width in pixels"),
SM_CYSCREEN, TEXT ("SM_CYSCREEN"),
TEXT ("Screen height in pixels"),
SM_CXVSCROLL, TEXT ("SM_CXVSCROLL"),
TEXT ("Vertical scroll width"),
SM_CYHSCROLL, TEXT ("SM_CYHSCROLL"),
TEXT ("Horizontal scroll height"),
SM_CYCAPTION, TEXT ("SM_CYCAPTION"),
TEXT ("Caption bar height"),
SM_CXBORDER, TEXT ("SM_CXBORDER"),
TEXT ("Window border width"),
SM_CYBORDER, TEXT ("SM_CYBORDER"),
TEXT ("Window border height"),
SM_CXFIXEDFRAME, TEXT ("SM_CXFIXEDFRAME"),
TEXT ("Dialog window frame width"),
SM_CYFIXEDFRAME, TEXT ("SM_CYFIXEDFRAME"),
TEXT ("Dialog window frame height"),
SM_CYVTHUMB, TEXT ("SM_CYVTHUMB"),
TEXT ("Vertical scroll thumb height"),
SM_CXHTHUMB, TEXT ("SM_CXHTHUMB"),
TEXT ("Horizontal scroll thumb width"),
SM_CXICON, TEXT ("SM_CXICON"),
TEXT ("Icon width"),
SM_CYICON, TEXT ("SM_CYICON"),
TEXT ("Icon height"),
SM_CXCURSOR, TEXT ("SM_CXCURSOR"),
TEXT ("Cursor width"),
SM_CYCURSOR, TEXT ("SM_CYCURSOR"),
TEXT ("Cursor height"),
SM_CYMENU, TEXT ("SM_CYMENU"),
TEXT ("Menu bar height"),
SM_CXFULLSCREEN, TEXT ("SM_CXFULLSCREEN"),
TEXT ("Full screen client area width"),
SM_CYFULLSCREEN, TEXT ("SM_CYFULLSCREEN"),
TEXT ("Full screen client area height"),
SM_CYKANJIWINDOW, TEXT ("SM_CYKANJIWINDOW"),
TEXT ("Kanji window height"),
SM_MOUSEPRESENT, TEXT ("SM_MOUSEPRESENT"),
TEXT ("Mouse present flag"),
SM_CYVSCROLL, TEXT ("SM_CYVSCROLL"),
TEXT ("Vertical scroll arrow height"),
SM_CXHSCROLL, TEXT ("SM_CXHSCROLL"),
TEXT ("Horizontal scroll arrow width"),
SM_DEBUG, TEXT ("SM_DEBUG"),
TEXT ("Debug version flag"),
SM_SWAPBUTTON, TEXT ("SM_SWAPBUTTON"),
TEXT ("Mouse buttons swapped flag"),
SM_CXMIN, TEXT ("SM_CXMIN"),
TEXT ("Minimum window width"),
SM_CYMIN, TEXT ("SM_CYMIN"),
TEXT ("Minimum window height"),
SM_CXSIZE, TEXT ("SM_CXSIZE"),
TEXT ("Min/Max/Close button width"),
SM_CYSIZE, TEXT ("SM_CYSIZE"),
TEXT ("Min/Max/Close button height"),
SM_CXSIZEFRAME, TEXT ("SM_CXSIZEFRAME"),
TEXT ("Window sizing frame width"),
SM_CYSIZEFRAME, TEXT ("SM_CYSIZEFRAME"),
TEXT ("Window sizing frame height"),
SM_CXMINTRACK, TEXT ("SM_CXMINTRACK"),
TEXT ("Minimum window tracking width"),
SM_CYMINTRACK, TEXT ("SM_CYMINTRACK"),
TEXT ("Minimum window tracking height"),
SM_CXDOUBLECLK, TEXT ("SM_CXDOUBLECLK"),
TEXT ("Double click x tolerance"),
SM_CYDOUBLECLK, TEXT ("SM_CYDOUBLECLK"),
TEXT ("Double click y tolerance"),
SM_CXICONSPACING, TEXT ("SM_CXICONSPACING"),
TEXT ("Horizontal icon spacing"),
SM_CYICONSPACING, TEXT ("SM_CYICONSPACING"),
TEXT ("Vertical icon spacing"),
SM_MENUDROPALIGNMENT, TEXT ("SM_MENUDROPALIGNMENT"),
TEXT ("Left or right menu drop"),
SM_PENWINDOWS, TEXT ("SM_PENWINDOWS"),
TEXT ("Pen extensions installed"),
SM_DBCSENABLED, TEXT ("SM_DBCSENABLED"),
TEXT ("Double-Byte Char Set enabled"),
SM_CMOUSEBUTTONS, TEXT ("SM_CMOUSEBUTTONS"),
TEXT ("Number of mouse buttons"),
SM_SECURE, TEXT ("SM_SECURE"),
TEXT ("Security present flag"),
SM_CXEDGE, TEXT ("SM_CXEDGE"),
TEXT ("3-D border width"),
SM_CYEDGE, TEXT ("SM_CYEDGE"),
TEXT ("3-D border height"),
SM_CXMINSPACING, TEXT ("SM_CXMINSPACING"),
TEXT ("Minimized window spacing width"),
SM_CYMINSPACING, TEXT ("SM_CYMINSPACING"),
TEXT ("Minimized window spacing height"),
SM_CXSMICON, TEXT ("SM_CXSMICON"),
TEXT ("Small icon width"),
SM_CYSMICON, TEXT ("SM_CYSMICON"),
TEXT ("Small icon height"),
SM_CYSMCAPTION, TEXT ("SM_CYSMCAPTION"),
TEXT ("Small caption height"),
SM_CXSMSIZE, TEXT ("SM_CXSMSIZE"),
TEXT ("Small caption button width"),
SM_CYSMSIZE, TEXT ("SM_CYSMSIZE"),
TEXT ("Small caption button height"),
SM_CXMENUSIZE, TEXT ("SM_CXMENUSIZE"),
TEXT ("Menu bar button width"),
SM_CYMENUSIZE, TEXT ("SM_CYMENUSIZE"),
TEXT ("Menu bar button height"),
SM_ARRANGE, TEXT ("SM_ARRANGE"),
TEXT ("How minimized windows arranged"),
SM_CXMINIMIZED, TEXT ("SM_CXMINIMIZED"),
TEXT ("Minimized window width"),
SM_CYMINIMIZED, TEXT ("SM_CYMINIMIZED"),
TEXT ("Minimized window height"),
SM_CXMAXTRACK, TEXT ("SM_CXMAXTRACK"),
TEXT ("Maximum draggable width"),
SM_CYMAXTRACK, TEXT ("SM_CYMAXTRACK"),
TEXT ("Maximum draggable height"),
SM_CXMAXIMIZED, TEXT ("SM_CXMAXIMIZED"),
TEXT ("Width of maximized window"),
SM_CYMAXIMIZED, TEXT ("SM_CYMAXIMIZED"),
TEXT ("Height of maximized window"),
SM_NETWORK, TEXT ("SM_NETWORK"),
TEXT ("Network present flag"),
SM_CLEANBOOT, TEXT ("SM_CLEANBOOT"),
TEXT ("How system was booted"),
SM_CXDRAG, TEXT ("SM_CXDRAG"),
TEXT ("Avoid drag x tolerance"),
SM_CYDRAG, TEXT ("SM_CYDRAG"),
TEXT ("Avoid drag y tolerance"),
SM_SHOWSOUNDS, TEXT ("SM_SHOWSOUNDS"),
TEXT ("Present sounds visually"),
SM_CXMENUCHECK, TEXT ("SM_CXMENUCHECK"),
TEXT ("Menu check-mark width"),
SM_CYMENUCHECK, TEXT ("SM_CYMENUCHECK"),
TEXT ("Menu check-mark height"),
SM_SLOWMACHINE, TEXT ("SM_SLOWMACHINE"),
TEXT ("Slow processor flag"),
SM_MIDEASTENABLED, TEXT ("SM_MIDEASTENABLED"),
TEXT ("Hebrew and Arabic enabled flag"),
SM_MOUSEWHEELPRESENT, TEXT ("SM_MOUSEWHEELPRESENT"),
TEXT ("Mouse wheel present flag"),
SM_XVIRTUALSCREEN, TEXT ("SM_XVIRTUALSCREEN"),
TEXT ("Virtual screen x origin"),
SM_YVIRTUALSCREEN, TEXT ("SM_YVIRTUALSCREEN"),
TEXT ("Virtual screen y origin"),
SM_CXVIRTUALSCREEN, TEXT ("SM_CXVIRTUALSCREEN"),
TEXT ("Virtual screen width"),
SM_CYVIRTUALSCREEN, TEXT ("SM_CYVIRTUALSCREEN"),
TEXT ("Virtual screen height"),
SM_CMONITORS, TEXT ("SM_CMONITORS"),
TEXT ("Number of monitors"),
SM_SAMEDISPLAYFORMAT, TEXT ("SM_SAMEDISPLAYFORMAT"),
TEXT ("Same color format flag")
} ;
整个程序结构与上一篇的几乎一致。
不过这个程序还是有很多不足，比如坐标通过直接定义，未考虑窗口尺寸大小，输出信息可能不能完全显示等，后面我们再通过修改程序进一步完善
windows程序设计读书笔记2——字符显示1的更多相关文章
- windows程序设计读书笔记4——字符显示3
在之前的一章里我们使用InvalidateRect函数,生成窗口重绘消息进行重绘,但是并没有在处理滚动条消息时直接绘制,这样的代码效率并不高. 这里作者使用了UpdateWindow函数,直接进行窗口 ...
- windows程序设计读书笔记3——字符显示2
由于显示的字符可能会不全,我们很容易想到的一个解决办法是使用滚动条. 先看一下代码,再进行分析: /*------------------------------------------------- ...
- windows程序设计读书笔记1——创建窗口
第一个win32程序,简单的创建窗口: #include <windows.h> LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ...
- Windows内核读书笔记——Windows异常分发处理机制
本篇读书笔记主要参考自<深入解析Windows操作系统>和<软件调试>这两本书. IDT是处理异常,实现操作系统与CPU的交互的关口. 系统在初始化阶段会去填写这个结构. ID ...
- Windows程序设计学习笔记（一）Windows内存管理初步
学习Windows程序设计也有一些时间了,为了记录自己的学习成果,以便以后查看,我希望自己能够坚持写下一系列的学习心得,对自己学习的内容进行总结,同时与大家交流.因为刚学习所以可能有的地方写不不正确, ...
- javascript高级程序设计读书笔记-事件（一）
读书笔记,写的很乱 事件处理程序 事件处理程序分为三种: 1.html事件2. DOM0级,3,DOM2级别 没有DOM1 同样的事件 DOM0会顶掉html事件 因为他们都是属性 而 ...
- Windows程序设计学习笔记(1):一个简单的windows程序
<Windows程序设计>(第五版)(美Charles Petzold著) #include<windows.h> LRESULT CALLBACK WndProc(HWND, ...
- AngularJS高级程序设计读书笔记 -- 大纲篇
零. 初衷 现在 AngularJS 4 已经发布了, 楼主还停留在 1.x 的阶段, 深感自卑. 学习 AngularJS 的初衷是因为, 去年楼主开始尝试使用 Flask 开发自动化程序, 需要用 ...
- 关于Lua程序设计{读书笔记}
1.lua中的标识符可以是由任意字母.数字和下划线构成的字符串,但不能以数字开头.2.lua将通常类似"_VALUE"的标识符作为保留标识符3.lua的保留字 and break ...
随机推荐
- iOS Layer CABasicAnimation
@import url(http://i.cnblogs.com/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/c ...
- EF 拉姆达 动态拼接查询语句
EF 动态拼接查询语句 using System; using System.Collections.Generic; using System.IO; using System.Linq; usin ...
- 源码编译安装 PHP5.5.0，解决curl_exec访问HTTPS返回502错误的问题（修改PATH路径）
最近碰到一个奇怪的问题, PHP使用 curl_exec 访问 HTTPS 网页时, 返回502错误, 访问HTTP网页时没有问题, 用 echo phpinfo() ; 查看, 支持op ...
- UVA10487(二分）
Given is a set of integers and then a sequence of queries. A query gives you a number and asks to fin ...
- 在国内使用cnpm代替npm
npm是Node.js的模块依赖管理工具,由于使用npm安装包是从国外服务器下载,在国内很容易受到网络的影响,速度非常慢,因此可以选用cnpm.cnpm可以使用淘宝团队提供的淘宝npm镜像,你可以用此 ...
- gdb 调试coredump文件过程
gdb 调试coredump文件过程: 第一步:首先需要一个进程的coredump文件,怎么搞出coredump文件呢? 1. ps -fax|grep 进程名称 找到 ...
- Unity 关于属性的get/set
学习Unity的可能多数是C#转过来的, 一进来的时候你会发现Unity编写代码,在一些视频或文章中.基本都没有用过get/set使用, 多数是public string name;这样写的公开字段, ...
- HttpURLConnection访问url的工具类
java代码: import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; ...
- Unity3d修炼之路：载入一个预制体，然后为该对象加入组件，然后查找对象，得到组件。
#pragma strict function Awake(){ //载入一个预制体 资源必须在 Resources目录下 Resources.LoadLoad(); //载入后 必须演示样例化 Ga ...
- webpack+gulp实现自动构建部署
项目结构说明 . ├── gulpfile.js # gulp任务配置 ├── mock/ # 假数据文件 ├── package.json # 项目配置 ├── README.md # 项目说明 ├ ...