鼠标事件回放

#include "stdafx.h"
#ifdef _CH_
#pragma package <opencv>
#endif

#include "cv.h"
#include "highgui.h"
#include <stdio.h>
#include <stdlib.h>

IplImage* inpaint_mask = 0;
IplImage* img0 = 0, *img = 0, *inpainted = 0;
CvPoint prev_pt = {-1,-1};

void on_mouse( int event, int x, int y, int flags, void* )
{
if( !img )
return;
//左键松开  不左键拖拽
if( event == CV_EVENT_LBUTTONUP || !(flags & CV_EVENT_FLAG_LBUTTON) )
prev_pt = cvPoint(-1,-1);
//左键点击
else if( event == CV_EVENT_LBUTTONDOWN )
prev_pt = cvPoint(x,y);
//滑动
else if( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON) )
{
CvPoint pt = cvPoint(x,y);
if( prev_pt.x < 0 )
prev_pt = pt;
cvLine( inpaint_mask, prev_pt, pt, cvScalarAll(255), 5, 8, 0 );
cvLine( img, prev_pt, pt, cvScalarAll(255), 5, 8, 0 );
prev_pt = pt;
cvShowImage( "image", img );
cvShowImage( "watershed transform", inpaint_mask );
}
}

int main( int argc, char** argv )
{
char* filename ="f:\\vc\\cv\\qq.png";

if( (img0 = cvLoadImage(filename,1)) == 0 )
return 0;

printf( "Hot keys: \n"
"\tESC - quit the program\n"
"\tr - restore the original image\n"
"\ti or ENTER - run inpainting algorithm\n"
"\t\t(before running it, paint something on the image)\n" );

cvNamedWindow( "image", 1 );
cvNamedWindow("watershed transform",1);
img = cvCloneImage( img0 );
inpainted = cvCloneImage( img0 );
inpaint_mask = cvCreateImage( cvGetSize(img), 8, 1 );

cvZero( inpaint_mask );
cvZero( inpainted );
cvShowImage( "image", img );
cvShowImage( "watershed transform", inpaint_mask );
cvSetMouseCallback( "image", on_mouse, 0 );

for(;;)
{
int c = cvWaitKey(0);

if( (char)c == 27 )
break;

if( (char)c == 'r' )
{
cvZero( inpaint_mask );
cvCopy( img0, img );
cvShowImage( "image", img );
}

if( (char)c == 'i' || (char)c == '\n' )
{
cvNamedWindow( "inpainted image", 1 );
cvInpaint( img, inpaint_mask, inpainted, 3, CV_INPAINT_TELEA );
cvShowImage( "inpainted image", inpainted );
}
}

return 1;
}