[LVGL] gesture event LV_EVENT_GESTURE missing

[lehoangphuc86]

Hi Team,

I am new to this tool. While designing our GUI, it seems we are missing the LV_EVENT_GESTURE event on the event dropdown.
May I know how to detect the gesture event like the lvgl natively supports?

Appreciate your response.
Version: 0.14.2
LVGL: 8.3

Peter

[mvladic]

Done. Will be released in EEZ Studio version 0.15.0.

Here is an example project:

test_gesture_event.zip

[mvladic]

To receive Gesture event, "Gesture bubble" flag must be unchecked:

[lehoangphuc86]

Thanks for your quick action. It means there is no option to get the gesture event in 0.14.2 right?
Also, I am working in lvgl + eez without flow. In my screen, I only have the dropdown to select the possible events.

[mvladic]

It means there is no option to get the gesture event in 0.14.2 right?

Correct.

[mvladic]

Also, I am working in lvgl + eez without flow. In my screen, I only have the dropdown to select the possible events.

You can always add event handler from the code.

[lehoangphuc86]

Also, I am working in lvgl + eez without flow. In my screen, I only have the dropdown to select the possible events.

You can always add event handler from the code.

It means, I need to modify the generated source code to handle the LV_EVENT_GESTURE event right?
I prefer to not touching the generated source code, because any time I modify something on the GUI, I will re-generate and it will override my modification.
Currently, I am separating the generated source and the app implementation.
If you confirm the same, in the next version, I think it is better to add all supported events into the dropdown on the studio or let user add their customize event name .

Thank you. I will close the issue after your confirmation.

[mvladic]

It means, I need to modify the generated source code to handle the LV_EVENT_GESTURE event right?

No, I didn't mean to modify the generated source code. After ui_init() you can add any additional initialization for whatever reason, most often because something is not supported by the Studio. You can set the "Name" property of the widget you wish to reference from your custom code. For example:

#include "src/ui.h"

static void gesture_event_handler(lv_event_t *e) {
  lv_dir_t dir = lv_indev_get_gesture_dir(lv_indev_active());
  switch(dir) {
    case LV_DIR_LEFT:
      ...
      break;
    case LV_DIR_RIGHT:
      ...
      break;
    case LV_DIR_TOP:
      ...
      break;
    case LV_DIR_BOTTOM:
      ...
      break;
  }
}

int main() {
  ...

  ui_init();

  // my custom initialization, 
  // here we reference the widget with the Name "my_widget"
  lv_obj_add_event_cb(objects.my_widget, gesture_event_handler, LV_EVENT_GESTURE, 0);

  ...
}

[lehoangphuc86]

Thank you for the clarification. Please close this case.