#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);
}