Hello,
I'ver got a problem with the initalisation of the required function pionter "on_change" in createButton(const string& bar_name, ButtonCallback on_change, void* userdata=NULL, int type=CV_PUSH_BUTTON, bool initial_button_state=0 ). The compiler gives the error that the identifiers is not defined. Although, I initalised it just like the "CallBackFunc" which is working fine.
Does somebody has an idea where the problem is?
Thank you!
This is my code:
void On_click(int state, void *pointer)
{
printf("Check!");
}
void CallBackFunc(int event, int x, int y, int flags, void* userdata)
{
if (event == EVENT_LBUTTONDOWN)
{
cout << "Left button of the mouse is clicked - position (" << x << ", " << y << ")" << endl;
}
else if (event == EVENT_RBUTTONDOWN)
{
cout << "Right button of the mouse is clicked - position (" << x << ", " << y << ")" << endl;
}
else if (event == EVENT_MBUTTONDOWN)
{
cout << "Middle button of the mouse is clicked - position (" << x << ", " << y << ")" << endl;
}
else if (event == EVENT_MOUSEMOVE)
{
cout << "Mouse move over the window - position (" << x << ", " << y << ")" << endl;
}
}
int main(int argc, char** argv)
{
// Read image from file
Mat img = imread("lena.tif");
//if fail to read the image
if (img.empty())
{
cout << "Error loading the image" << endl;
return -1;
}
//Create a window
namedWindow("My Window", CV_WINDOW_NORMAL);
char* nameb1 = "button1";
cv::createButton(nameb1, On_click, nameb1, CV_CHECKBOX, 1);
//set the callback function for any mouse event
setMouseCallback("My Window", CallBackFunc, NULL);
//show the image
imshow("My Window", img);
// Wait until user press some key
waitKey(0);
return 0;
}
