feat(indev): detect double and triple click (closes #6020)

[niklasf]

This is a first attempt at detecting double and triple clicks (#6020). It's basically working but needs documentation and testing. I have some questions before proceding:

• Should LV_EVENT_SHORT_CLICKED, LV_EVENT_DOUBLE_CLICKED, and LV_EVENT_TRIPLE_CLICKED be separate events, or should there be something like int lv_event_get_short_click_streak(lv_event_t*)?
• Should short/double/triple click be mutually exclusive, or is every double/triple click also a short click?

[kisvegabor]

Should LV_EVENT_SHORT_CLICKED, LV_EVENT_DOUBLE_CLICKED, and LV_EVENT_TRIPLE_CLICKED be separate events, or should there be something like int lv_event_get_short_click_streak(lv_event_t*)?

These should be separate events to allow easily adding a generic callback to an event.

Should short/double/triple click be mutually exclusive, or is every double/triple click also a short click?

Good question. On web on double click two onclick events are fired. I think we should follow the same principle. Adding LV_EVENT_SINGLE_CLICKED might make sense though.

cc @XuNeo

[XuNeo]

The clicked event should be fired the first time of a double or triple click. The second and third click can be eliminated because now you know for sure it's a double click.

However, following with standard web behavior is also recommended.

Similar for the double click event inside of a triple click. It should also be fired as soon as it's detected.

[kisvegabor]

The clicked event should be fired the first time of a double or triple click. The second and third click can be eliminated because now you know for sure it's a double click.
However, following with standard web behavior is also recommended.

I think adding LV_EVENT_SINGLE_CLICKED, and firing LV_EVENT_CLICKED three times on triple click would be a good solution.