Ocamler <ocam...@...> writes:
> Hi,I'm trying to use Agar from C++, and am having trouble getting event
callbacks, like those initiated by AG_Button click events, to call a class
method properly.
Try this:
#include <agar/core.h>
#include <agar/gui.h>
#include <agar/dev.h>
#include <stdio.h>
class cppgui
{
private:
AG_Window *win_;
int foo;
// Callbacks must be global (and thus static)!!!
static void ButtonCallback(AG_Event *event) {
cppgui *This = (cppgui*)AG_PTR(1); // Let the static metod have
acces to the calling object instance
printf("You clicked the button! And foo is %i\n", This->foo);
}
public:
cppgui()
{
this->foo = 1234; // something...
win_ = AG_WindowNew(0);
AG_ButtonNewFn(win_, 0, "Click me", ButtonCallback, "%p", this);
AG_WindowShow(win_);
}
~cppgui() {
AG_Destroy();
}
void run() {
AG_EventLoop();
}
};
void die(const char *format, ...)
{
va_list arg;
va_start(arg, format);
vfprintf(stderr, format, arg);
va_end(arg);
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[])
{
if (AG_InitCore("test", 0) == -1)
die("%s\n", AG_GetError());
if (AG_InitVideo(200, 200, 32, 0) == -1)
die("%s\n", AG_GetError());
cppgui test;
test.run();
return 0;
}
Let me know if you found some other way.
- Eisbaw
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