A TouchScreen library that implements all the InputEvents::EventButton events plus DRAG & DRAGGED in response to user interaction.
This library is part of the InputEvents family (and is namespaced as such) bringing EventButton events to the touch screen.
The EventTouchScreen is the heart of the library, using a TouchScreenAdapter to provide a unified interface via a thin adapter for each underlying touch screen library (pull requests welcome).
In addition, Regions and a Widgets are provided, enabling extensive manipulation of rectangular screen areas including a widget base class and specialised touch, button label (for physical buttons), event and virtual pin (to 'virtually' press/release a linked physical button from the touch screen) specialised widget mixins. There is also a widget container, a widget row container and last but not least, a touch keypad widget!
All of this is display driver agnostic - that is, although a draw() method is specified in the base widget interface, all drawing is implemented in concrete widget classes using your favourite GFX library.
This is a concrete implementation of the BaseTouchKeypadWidget. The ❌ and ✔️ each respond to both touch and the physical buttons below them.
The screen buttons provide visual feedback when pressed.
(This screen is part of the ManualmaticLib project. I will link to the source when I have published it - if you can't wait, chat with me on Discord...)
The touch interactions work very well on capacitive touch panels and better than expected on resistive ones! For everyone accustomed to phone screens, the resistive panel is a particular challenge and for that reason a 'debouncer' (who'd have thought you'd need that?) is included. Refining with EventTouchScreen::setDebounceInterval() can dramatically improve the behaviour of resistive touch panels.
Feedback, bug reports and pull requests are very welcome or chat on Discord if you have any questions.
Whilst this library is fully functional and broadly tested, it is still a work in progress, so there may be API changes.
Note: The IEventScreen and EventScreenManager are not currently available for AVR boards (no std library support).