一、創建滑動條
int cvCreateTrackbar(const char* trackbar_name,const char* window_name,int* value,int count,CvTrackbarCallback on_change);int cvGetTrackbarPos(const char* trackbar_name,const char* window_name);void cvSetTrackbarPos(const char* trackbar_name,const char* window_name,int pos);二、例程（使用滑動條實現一個開關的功能）
#include "highgui.h"int g_switch_value = 0;void switch_callback(int position);int main(int argc,char** argv){ cvNamedWindow("Example3_7"); cvCreateTrackbar("bar","Example3_7",&g_switch_value,100,switch_callback); cvWaitKey(0); return 0;}void switch_callback(int position){ if(position == 0) { switch_off_function(); } else { switch_on_function(); }}新聞熱點
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