CFUserNotification With 3 Buttons

Here's a sample to display a MessageBox with more than 1 button, and how to get the user response.

/***

 * test4.c

 * CFUserNotification Dialog with 3 buttons

 * 

 * Compile with the following commands:

 *   gcc -framework CoreFoundation -o Test4 test4.c

 *   mkdir -pv Test4.app/Contents/MacOS && mv -v Test4 Test4.app/Contents/MacOS

 *

 */

#include <CoreFoundation/CoreFoundation.h>

int main(int argc, const char** argv)

{

CFOptionFlags cfRes;

CFStringRef strTest = CFSTR("Test Button");

CFUserNotificationDisplayAlert(5, kCFUserNotificationNoteAlertLevel, 

NULL, NULL, NULL, 

CFSTR("Testing"), 

CFSTR("Click on any button..."), 

CFSTR("OK"), 

CFSTR("Cancel"), 

CFSTR("Test Button"), 

&cfRes);

switch (cfRes)

{

case kCFUserNotificationDefaultResponse:

strTest = CFSTR("Default response");

break;

case kCFUserNotificationAlternateResponse:

strTest = CFSTR("Alternate response");

break;

case kCFUserNotificationOtherResponse:

strTest = CFSTR("Other response");

break;

default:

strTest = CFSTR("Cancel response");

break;

}

CFUserNotificationDisplayNotice(0, kCFUserNotificationPlainAlertLevel, 

NULL, NULL, NULL, CFSTR("Result"),
                                        strTest, CFSTR("OK"));

return 0;

}

I intentionally used 5 seconds timeout for parameter 1 (argument 0) to call CFUserNotificationDisplayAlert(), so that we can see more differences than previous examples. If we pass 0 for this parameter, then the Dialog Box will never be dismissed automatically, unless the user click one of the buttons.

The 3 NULL parameters above are for the address of iconFileURL, soundFileURL, and localizedStringURL. We don't use iconFileURL because we use the icon from system through the second parameter kCFUserNotificationNoteAlertLevel, which display a balloon with 'I'. The other ones are 'Stop', 'Caution', and 'Plain' --- AlertLevel. Try to change it yourself and recompile you code.

Check out Mac OS X official documentations for this.