>_<:This time we will study a new way to operate your picture.That is running your picture by give it a timer-message.
>_<:Firstly,you should use the function SetTimer(hWnd,1,50,NULL) to create and set a timer (here "1" means the timer is number 1,you can understand it as the timer's name; "50" means frequency)
>_<:Then only need to add timer-message listener in WndProc(...) function:
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int i; switch (message) //判断消息类型
{
case WM_TIMER: //时间消息
MyPaint(hdc);
break;
case WM_DESTROY: //处理窗口结束消息
DeleteDC(mdc);
ReleaseDC(hWnd,hdc);
for(i=;i<;i++)
DeleteObject(girl[i]);
KillTimer(hWnd,);
PostQuitMessage();
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return ;
}
>_<:And now function MyPaint(...) will be carryed out at stated times.
>_<:code:picture resource
//{{NO_DEPENDENCIES}}
// Microsoft Visual C++ generated include file.
// Used by FE.RC
//
#define IDR_MAINFRAME 128
#define IDD_FE_DIALOG 102
#define IDD_ABOUTBOX 103
#define IDS_APP_TITLE 103
#define IDM_ABOUT 104
#define IDM_EXIT 105
#define IDS_HELLO 106
#define IDI_FE 107
#define IDI_SMALL 108
#define IDC_FE 109
#define IDC_MYICON 2
#define IDC_STATIC -1
// Next default values for new objects
//
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE 129
#define _APS_NEXT_COMMAND_VALUE 32771
#define _APS_NEXT_CONTROL_VALUE 1000
#define _APS_NEXT_SYMED_VALUE 110
#endif
#endif
resourse.h
// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
// #if !defined(AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_)
#define AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_ #if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000 #define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers // Windows Header Files:
#include <windows.h> // C RunTime Header Files
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h> // Local Header Files // TODO: reference additional headers your program requires here //{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line. #endif // !defined(AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_)
StdAfx.h
#include "stdafx.h"
#include "resourse.h"
#include "stdio.h"
#include "time.h" #define MAX_LOADSTRING 100 // Global Variables:
HINSTANCE hInst; // current instance
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text
HBITMAP girl[];
HDC mdc,hdc;
int num; // Foward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM);
void MyPaint(HDC hdc);
//========================================================================================
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
MSG msg; MyRegisterClass(hInstance);//调用函数向系统注册窗口类别，输入参数hInstance是目前运行程序的对象代码； // 调用InitInstance函数，进行初始化操作；
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
} // 消息循环（通过消息循环来获取信息，
//进行必要的键盘信息转换而后将控制权交给操作系统，
//有操作系统决定哪个程序的消息处理函数处理消息
while (GetMessage(&msg, NULL, , )) //获取程序消息
{
TranslateMessage(&msg);//转换伪码及字符
DispatchMessage(&msg);//将控制权交给系统，再有系统决定负责处理消息的程序；
} return msg.wParam;
}
//===================================================================================== //=============================================================================================
//在建立程序窗口实体之前，必须先定义一个窗口类别，其中包含所要建立窗口的信息，
//并向系统注册，这里的MyRegisterClass函数就是进行定义及注册窗口类别的函数。
//==============================================================================================
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex; //申请一个窗口类别“WNDCLASSEX”和结构”wcex“
//--------------------------------------------------------------
//定义vcex结构的各项信息，其中设定信息处理函数（lpfnWndProc）
//为WNDPROC，类别名称为（lpszClassName）为”fe";
//--------------------------------------------------------------
wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = ;
wcex.cbWndExtra = ;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = NULL;
wcex.hCursor = LoadCursor(NULL,IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "fe";
wcex.hIconSm = NULL; return RegisterClassEx(&wcex);//调用RegisterClassEx函数注册类别，返回一个“ATOM"形态的字符串
//此字符串即为类别名称”fe";
}
//============================================================================================ //============================================================================================
//按照前面所定义的窗口类别来建立并显示实际的程序窗口
//============================================================================================
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
char filename[]="";
int i;
hInst = hInstance; // 把instance handle 储存在全局变量中； hWnd = CreateWindow("fe","绘图窗口",WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, , CW_USEDEFAULT, , NULL, NULL, hInstance, NULL);
//-----------------------------------------------
//调用CreateWindow函数来建立一个窗口对象
//第一个参数就是窗口建立依据的类别名称
//-----------------------------------------------
if (!hWnd)
{
return FALSE;
}
//------------------------------------------------
//设定窗口的位置及窗口的大小，然后绘制显示在设备上
//-------------------------------------------------
MoveWindow(hWnd,,,,,true);//位置及大小
ShowWindow(hWnd, nCmdShow);//改定窗口显示时的状态
UpdateWindow(hWnd);//将窗口绘制在显示设备上 hdc=GetDC(hWnd);
mdc=CreateCompatibleDC(hdc); for(i=;i<;i++)
{
sprintf(filename,"map%d.bmp",i);
girl[i]=(HBITMAP)LoadImage(NULL,filename,IMAGE_BITMAP,,,LR_LOADFROMFILE);
} num=;
SetTimer(hWnd,,,NULL);
srand((unsigned)time(NULL)); MyPaint(hdc); return TRUE;
}
//============================================================================================ //============================================================================================
//
//============================================================================================
void MyPaint(HDC hdc)
{
if(num>)num=;
for(int j=;j<;j++)
{
SelectObject(mdc,girl[ rand()%]);
BitBlt(hdc,*(j%),j/*,,,mdc,,,SRCCOPY);
}
num++;
}
//============================================================================================ //============================================================================================
//在前面定义类别的时候把WndProc定义为消息处理函数（当某些外部消息发生时，会按消息的类型
//来决定该如何进行处理。此外该函数也是一个回叫函数（CALLBACK)（windows系统函数）每一个
//程序都会接收信息，选择性接受、处理；
//============================================================================================
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int i; switch (message) //判断消息类型
{
case WM_TIMER: //时间消息
MyPaint(hdc);
break;
case WM_DESTROY: //处理窗口结束消息
DeleteDC(mdc);
ReleaseDC(hWnd,hdc);
for(i=;i<;i++)
DeleteObject(girl[i]);
KillTimer(hWnd,);
PostQuitMessage();
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return ;
}
//============================================================================================
main.cpp