连接图片(二),实现根据鼠标方向,平滑移动

/*----------------------------------------
BRICKS1.C -- LoadBitmap Demonstration
(c) Charles Petzold, 1998
----------------------------------------*/

#include <windows.h>
#include <TCHAR.H>
#include <stdio.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName [] = TEXT ("Bricks1") ;
HWND         hwnd ;
MSG          msg ;
WNDCLASS     wndclass ;

wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc   = WndProc ;
wndclass.cbClsExtra    = 0 ;
wndclass.cbWndExtra    = 0 ;
wndclass.hInstance     = hInstance ;
wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
//wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.hbrBackground = NULL ;
wndclass.lpszMenuName  = NULL ;
wndclass.lpszClassName = szAppName ;

if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}

hwnd = CreateWindow (szAppName,
TEXT ("LoadBitmap Demo"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL
) ;

ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;

while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HBITMAP hBitmap,hBitmap2,memBM;
static int     cxClient, cyClient, cxSource, cySource,cxSource2, cySource2 ,cxSourceresult;
BITMAP         bitmap,bitmap2 ,bitmap3;
static HDC            hdc, hdcMem = NULL,hdcMem2 ,hdcMem3;
static HINSTANCE      hInstance ;

static long            lDistance = -10,lSrcLocation = 0;
static int            xMouseLocationfirst ;
static int            xMouseLocationsecond;
PAINTSTRUCT    ps ;
POINT          MousePointFirst;
POINT          MousePointSecond;
RECT           ClientRect;
static BOOL    IsInitialize = TRUE;
static BOOL    IsRight = TRUE;
static BOOL    IsShowResultPage = FALSE;
switch (message)
{
case WM_CREATE:
hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;
hBitmap = LoadBitmap (hInstance, TEXT ("IDB_BITMAP5")) ;  //载入图片资源(注意,应该先将图片添加到工程里)
hBitmap2 = LoadBitmap (hInstance,TEXT("IDB_BITMAP3"));
return 0 ;

case WM_SIZE:
cxClient = LOWORD (lParam) ; //获得客户区大小
cyClient = HIWORD (lParam) ;
return 0 ;

case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;

//判断是否要显示最终的页面
if(IsShowResultPage)
{
//创建兼容DC
hdcMem = CreateCompatibleDC (hdc) ;
hdcMem2 = CreateCompatibleDC (hdc) ;
hdcMem3 = CreateCompatibleDC (hdc) ;
SelectObject(hdcMem,hBitmap);
SelectObject(hdcMem2,hBitmap2);

//获得图片对象,从而获得图片的 长 宽(x,y)
GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;
GetObject (hBitmap2, sizeof (BITMAP), &bitmap2) ;
cxSource = bitmap.bmWidth ;
cySource = bitmap.bmHeight ;
cxSource2 = bitmap2.bmWidth ;
cySource2 = bitmap2.bmHeight ;

//创建与指定的设备环境相关的设备兼容的位图,注意x,应该为2张图片的x的和,获得兼容位图的x,y
memBM   = CreateCompatibleBitmap(hdc,cxSource+cxSource2,cySource);
SelectObject(hdcMem3,memBM);
GetObject (memBM, sizeof (BITMAP), &bitmap3);
cxSourceresult = bitmap3.bmWidth;

//将要连接的2张图片,分别依次加入到兼容位图 memBM 中去,注意BitBlt 参数的设置(x)
BitBlt(hdcMem3,0,0,cxSource,cySource,hdcMem,0,0,SRCCOPY);
DeleteDC(hdcMem);
BitBlt(hdcMem3,cxSource,0,cxSource2,cySource2,hdcMem2,0,0,SRCCOPY);
DeleteDC(hdcMem2);

//if(lSrcLocation >= cxSource/2)
if(!IsRight)
{
while(lSrcLocation <= cxSource )
{
BitBlt(hdc,0,0,cxSource+cxSource2,cySource,hdcMem3,lSrcLocation,0,SRCCOPY);
lSrcLocation = lSrcLocation + 10;
Sleep(1);

}
IsRight = TRUE;

}
else
{
while((lSrcLocation >= 0)/* && (lSrcLocation <= cxSource/2 )*/)
{
BitBlt(hdc,0,0,cxSource+cxSource2,cySource,hdcMem3,lSrcLocation,0,SRCCOPY);
lSrcLocation = lSrcLocation - 10;
Sleep(1);
}
IsRight = FALSE;
}

DeleteObject(memBM);
IsShowResultPage = FALSE;

}

else

{

//判断是否是刚启动程序,初始化客户区
if(IsInitialize == TRUE)
{
hdcMem = CreateCompatibleDC (hdc) ;
hdcMem2 = CreateCompatibleDC (hdc) ;
hdcMem3 = CreateCompatibleDC (hdc) ;
SelectObject(hdcMem,hBitmap);
SelectObject(hdcMem2,hBitmap2);

GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;
GetObject (hBitmap2, sizeof (BITMAP), &bitmap2) ;

cxSource = bitmap.bmWidth ;
cySource = bitmap.bmHeight ;

cxSource2 = bitmap2.bmWidth ;
cySource2 = bitmap2.bmHeight ;

memBM   = CreateCompatibleBitmap(hdc,cxSource+cxSource2,cySource);
SelectObject(hdcMem3,memBM);

GetObject (memBM, sizeof (BITMAP), &bitmap3);

cxSourceresult = bitmap3.bmWidth;

BitBlt(hdcMem3,0,0,cxSource,cySource,hdcMem,0,0,SRCCOPY);
DeleteDC(hdcMem);

BitBlt(hdcMem3,cxSource,0,cxSource2,cySource2,hdcMem2,0,0,SRCCOPY);
DeleteDC(hdcMem2);

BitBlt(hdc,0,0,cxSource+cxSource2,cySource,hdcMem3,0,0,SRCCOPY);

DeleteObject(memBM);
}
else
{
//TCHAR szBuf[MAX_PATH] = {0};
lSrcLocation = lSrcLocation+lDistance;

//wsprintf(szBuf,L"xRE = %d",lSrcLocation);
//OutputDebugString(szBuf);

hdcMem = CreateCompatibleDC (hdc) ;
hdcMem2 = CreateCompatibleDC (hdc) ;
hdcMem3 = CreateCompatibleDC (hdc) ;
SelectObject(hdcMem,hBitmap);
SelectObject(hdcMem2,hBitmap2);

GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;
GetObject (hBitmap2, sizeof (BITMAP), &bitmap2) ;

cxSource = bitmap.bmWidth ;
cySource = bitmap.bmHeight ;

cxSource2 = bitmap2.bmWidth ;
cySource2 = bitmap2.bmHeight ;

memBM   = CreateCompatibleBitmap(hdc,cxSource+cxSource2,cySource);
SelectObject(hdcMem3,memBM);

BitBlt(hdcMem3,0,0,cxSource,cySource,hdcMem,0,0,SRCCOPY);
DeleteDC(hdcMem);

BitBlt(hdcMem3,cxSource,0,cxSource2,cySource2,hdcMem2,0,0,SRCCOPY);
DeleteDC(hdcMem2);

if(lSrcLocation >=cxSource )
{
BitBlt(hdc,0,0,cxSource+cxSource2,cySource,hdcMem3,cxSource,0,SRCCOPY);
lSrcLocation = cxSource ;
lDistance = 0;
}
else if(lSrcLocation <= 0)
{
BitBlt(hdc,0,0,cxSource+cxSource2,cySource,hdcMem3,0,0,SRCCOPY);
lSrcLocation = 0;
lDistance = 0;
}
else
{
BitBlt(hdc,0,0,cxSource+cxSource2,cySource,hdcMem3,lSrcLocation,0,SRCCOPY);

}

DeleteObject(memBM);
}
}

DeleteDC (hdcMem3) ;
EndPaint (hwnd, &ps) ;
return 0 ;

case WM_MOUSEMOVE:

//当鼠标移动并且按下左键的时候,通过对比前后2次,鼠标位置的x值,来判断鼠标的移动方向
if(wParam & MK_LBUTTON)
{
IsInitialize = FALSE;

xMouseLocationfirst = xMouseLocationsecond;
GetCursorPos(&MousePointSecond);
xMouseLocationsecond = MousePointSecond.x;
if(xMouseLocationfirst >= xMouseLocationsecond)
{
IsRight = FALSE;

lDistance = +50;
}
else
{
IsRight = TRUE;
lDistance = -50;
}

InvalidateRect(hwnd,NULL,TRUE);
}
return 0;

case WM_LBUTTONUP:

IsShowResultPage = TRUE;
InvalidateRect(hwnd,NULL,TRUE);
return 0;

case WM_DESTROY:
DeleteObject (hBitmap) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}