OpenCV学习——滚动条

#include <iostream>
#include <cv.h>
#include <highgui.h>

void TrackBarFunc(int val);


struct _TrackBarData
{
char *Name; //trackbar的名字
int Pos; //trackbar的初始位置
int MaxValue; //上限値
};
_TrackBarData TBData={"TrackBar",127,255};


IplImage *imgA = cvCreateImage(cvSize(300,300),IPL_DEPTH_8U,3);

int main( int argc, char **argv)
{

cvSet (imgA, CV_RGB(0,255,0) );


cvNamedWindow("OpenCV",CV_WINDOW_AUTOSIZE);

cvCreateTrackbar( TBData.Name, "OpenCV", &TBData.Pos, TBData.MaxValue , TrackBarFunc);

cvWaitKey(0);

cvReleaseImage(&imgA);
cvDestroyAllWindows();

return 0;
}


void TrackBarFunc(int val)
{
std::cout << "now : " << val << "\n";
cvSet (imgA, CV_RGB(0,val,0) );
cvShowImage("OpenCV",imgA);
}