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Tactility/Documentation/ideas.md
Ken Van Hoeylandt c0ed8f0a44
Merge develop into main (#318) 
- Disable `DisplayDriver` for `St7701Display` (on CYD 4848)
- Improve `GraphicsDemo`: check for feature capability and show alert dialog if there's an issue
- `DevelopmentService` installs to `/data` instead of `/sdcard`
- Fixed `tt_app_get_data_directory()` and `tt_app_get_data_directory_lvgl()` (C++ to C)
- `tt_kernel.h` now defines `MAX_TICKS`
- `tt_init.cpp` now exports `esp_log()` which is required since ESP-IDF 5.5
2025-09-06 14:44:41 +02:00

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TODOs

Higher Priority

  • Fix Development service: when no SD card is present, the app fails to install. Consider installing to /data Note: Change app install to "transfer file" functionality. We can have a proper install when we have app packaging. Note: Consider installation path option in interface
  • External app loading: Check the version of Tactility and check ESP target hardware to check for compatibility.
  • Make a URL handler. Use it for handling local files. Match file types with apps. Create some kind of "intent" handler like on Android. The intent can have an action (e.g. view), a URL and an optional bundle. The manifest can provide the intent handler
  • Bug: GraphicsDemo should check if display supports the DisplayDriver interface (and same for touch) and show an AlertDialog error if there's a problem
  • Update ILI934x to v2.0.1
  • App packaging
  • Create an "app install paths" settings app to add/remove paths. Scan these paths on startup. Make the AppList use the scan results.

Lower Priority

  • Try out ILI9342 https://github.com/jbrilha/esp_lcd_ili9342
  • Localize all apps
  • Support hot-plugging SD card (note: this is not possible if they require the CS pin hack)
  • Create more unit tests for tactility
  • Explore LVGL9's FreeRTOS functionality
  • CrashHandler: use "corrupted" flag
  • CrashHandler: process other types of crashes (WDT?)
  • Add a Keyboard setting in keyboard.properties to override the behaviour of soft keyboard hiding (e.g. keyboard hardware is present, but the user wants to use a soft keyboard)
  • Use GPS time to set/update the current time
  • All drivers (e.g. display, touch, etc.) should call stop() in their destructor, or at least assert that they should not be running.
  • Fix bug in T-Deck/etc: esp_lvgl_port settings has a large stack size (~9kB) to fix an issue where the T-Deck would get a stackoverflow. This sometimes happens when WiFi is auto-enabled and you open the app while it is still connecting.
  • Start using non_null (either via MS GSL, or custom)
  • hal/Configuration.h defines C function types: Use C++ std::function instead
  • Fix system time to not be 1980 (use build year as a minimum). Consider keeping track of the last known time.
  • Use std::span or string_view in StringUtils https://youtu.be/FRkJCvHWdwQ?t=2754
  • Mutex: Implement give/take from ISR support (works only for non-recursive ones)
  • Extend unPhone power driver: add charging status, usb connection status, etc.
  • Create different partition files for different ESP flash size targets (N4, N8, N16, N32)
  • T-Deck: Clear screen before turning on blacklight
  • T-Deck: Use knob for UI selection?
  • Show a warning screen if firmware encryption or secure boot are off when saving WiFi credentials.
  • Show a warning screen when a user plugs in the SD card on a device that only supports mounting at boot.
  • Scanning SD card for external apps and auto-register them (in a temporary register?)
  • Remove flex_flow from app_container in Gui.cpp
  • Bug: Turn on WiFi (when testing it wasn't connected/connecting - just active). Open chat. Observe crash.

Nice-to-haves

  • Considering the lack of callstack debugging for external apps: allow for some debugging to be exposed during a device crash. Apps could report their state (e.g. an integer value) which can be stored during app operation and retrieve after crash. The same can be done for various OS apps and states. We can keep an array of these numbers to keep track of the last X states, to get an idea of what's going on.
  • Give external app a different icon. Allow an external app to update their id, icon, type and name once they are running (and persist that info?). Loader will need to be able to find app by (external) location.
  • Audio player app
  • Audio recording app
  • OTA updates
  • T-Deck Plus: Create separate board config?
  • Support for displays with different DPI. Consider the layer-based system like on Android.
  • If present, use LED to show boot/wifi status
  • Capacity based on voltage: estimation for various devices uses a linear voltage curve, but it should use some sort of battery discharge curve.
  • Statusbar widget to show how much memory is in use?
  • Wrapper for lvgl slider widget that shows "+" and "-" buttons, and also the value in a label.
  • Files app: copy/paste actions
  • On crash, try to save the current log to flash or SD card? (this is risky, though, so ask in Discord first)
  • Support more than 1 hardware keyboard (see lvgl::hardware_keyboard_set_indev()). LVGL init currently calls keyboard init, but that part should probably be done from the KeyboardDevice base class.

App Ideas