Handling Long Tap Events on Buttons in Tizen Native Applications

Problem Understanding

The user wants to implement long tap functionality on buttons in a Tizen native application. The core challenges are:

1. Native button objects don't directly support long tap events
2. Need to ensure the solution doesn't interfere with regular click events
3. Looking for the most efficient implementation method

Solution Methods

1. Gesture Layer Implementation:

   • The most reliable approach is to use Tizen's gesture layer API
   • Create a gesture layer over your button
   • Implement long tap detection using gesture callbacks

2. Custom Timer Solution:

   • Implement touch down/up event handlers
   • Use a timer to detect long presses
   • Clear the timer if the touch is released before the threshold

Code Examples

// Gesture layer implementation example
Evas_Object *gesture_layer = elm_gesture_layer_add(button);
elm_gesture_layer_attach(gesture_layer, button);
elm_gesture_layer_cb_set(gesture_layer, ELM_GESTURE_N_LONG_TAP, 
    ELM_GESTURE_STATE_MOVE, _long_tap_cb, data);

// Timer-based implementation example
static void _button_down(void *data, Evas *e, Evas_Object *obj, void *event_info) {
    ecore_timer_add(1.0, _long_press_cb, data); // 1 second threshold
}

static void _button_up(void *data, Evas *e, Evas_Object *obj, void *event_info) {
    ecore_timer_del(timer); // Cancel if released before threshold
}

Additional Tips

• The gesture layer method is generally more reliable and recommended
• Set appropriate time thresholds (typically 500ms-1000ms) for long tap detection
• Test thoroughly to ensure regular click events aren't affected
• Consider visual feedback (like button highlight) during long press