Hi, I want to create a button but keep having an error on call back function. When I put an event on call back function, then it shows errors.
how to write a simple call back function for button?
For example, createButton("button6",callbackButton2,NULL,CV_PUSH_BUTTON,1);
What is the "callbackButton2" means?
or how to create a simple function of button?
did you build your opencv libs with Qt support ? (else it is not supported at all)
the signature of your callback function should be:
void callback(int state, void*userData) {
// do something
}
then add it to the button:
createButton("button6",callback, NULL, CV_PUSH_BUTTON,1);
see above, again, please.
(and no you probably don't have any such thing. you would have remembered setrting it up.)
last, you should use your time to write kick-ass computer-vision algo's not waste it on gui problems. 2 years later, noone will look at your current program, promised !
Asked: 2018-12-22 03:26:36 -0600
Seen: 1,653 times
Last updated: Dec 22 '18
