如何用c++在opencv中在鼠标指定的位置输入文字，能序列化

代码一：点击时显示坐标，鼠标移动时不显示。

[cpp]
#include
#include
#include

IplImage* src=0;
void on_mouse( int event, int x, int y, int flags, void* ustc)
{
CvFont font;
cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.5, 0.5, 0, 1, CV_AA);

if( event == CV_EVENT_LBUTTONDOWN )
{
CvPoint pt = cvPoint(x,y);
char temp[16];
sprintf(temp,"(%d,%d)",pt.x,pt.y);
cvPutText(src,temp, pt, &font, cvScalar(255, 255, 255, 0));
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
cvShowImage( "src", src );
}
}

int main()
{
src=cvLoadImage("lena.jpg",1);

cvNamedWindow("src",1);
cvSetMouseCallback( "src", on_mouse, 0 );

cvShowImage("src",src);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&src);

return 0;
}

代码二：鼠标移动时显示坐标，点击时不显示坐标
[cpp]
#include
#include
#include

IplImage* src=0;
IplImage* dst=0;
void on_mouse( int event, int x, int y, int flags, void* ustc)
{