//SetFocusCallback sets the focus callback of the window, which is called when
//the window gains or loses focus.
//
//After the focus callback is called for a window that lost focus, synthetic key
//and mouse button release events will be generated for all such that had been
//pressed. For more information, see SetKeyCallback and SetMouseButtonCallback.
func (w *Window) SetFocusCallback(cbfun func(w *Window, focused bool)) {
if cbfun == nil {
C.glfwSetWindowFocusCallback(w.data, nil)
} else {
w.fFocusHolder = cbfun
C.glfwSetWindowFocusCallbackCB(w.data)
}
}
// SetFocusCallback sets the focus callback of the window, which is called when
// the window gains or loses focus.
//
// After the focus callback is called for a window that lost focus, synthetic key
// and mouse button release events will be generated for all such that had been
// pressed. For more information, see SetKeyCallback and SetMouseButtonCallback.
func (w *Window) SetFocusCallback(cbfun FocusCallback) (previous FocusCallback) {
previous = w.fFocusHolder
w.fFocusHolder = cbfun
if cbfun == nil {
C.glfwSetWindowFocusCallback(w.data, nil)
} else {
C.glfwSetWindowFocusCallbackCB(w.data)
}
panicError()
return previous
}