CRITICAL FIX: Restore NewFrame/Shutdown/GetDisplayMetrics lost in rebase
- File was truncated at line 605 during rebase onto upstream/master
- Restored all three functions with proper implementations
REVIEW FEEDBACK ADDRESSED:
1. Rotation: Re-query display metrics in NewFrame when window resizes
2. Keyboard opt-in: SetJniEnabled(false by default) - app retains control
- SetKeyboardType() / SetKeyboardAction() for customization
3. Keyboard timing: GetWantTextInput() / ResubmitTextInput() for app control
4. Back button: Hides soft keyboard when visible (consumes event)
5. Unicode input: Kept as optional JNI plumbing (app decides when to poll)
6. GetAssetData: Documented in PR_9469_REVIEW_RESPONSE.md (restore in main.cpp)
7. TERM_WINDOW: Documented (EGL surface lifecycle fix in main.cpp)
8. NavBar/insets: GetNavBarHeight() + GetBottomInset() (DisplayCutout API 28+)
Long press: SetLongPressCallback() + SetLongPressDuration()
Pressure: Full pressure sensitivity system
PRESSURE SENSITIVITY:
- Per-pointer pressure tracking (up to 10 pointers)
- GetTouchPressure(pointer_id) API
- SetPressureEnabled() / SetPressureThreshold()
- Long-press requires sustained min pressure (not just timer)
- Pressure-weighted scrolling (firmer press = faster scroll)
- Move events update pressure and cancel long-press if pressure drops
All APIs are opt-in. Default behavior preserves pre-PR #9469 app control.
Backend improvements (imgui_impl_android.h/.cpp):
- Moved JNI soft-keyboard and Unicode char polling from the example into
the backend. The application no longer needs any JNI boilerplate.
- Added clipboard support via JNI to Android ClipboardManager. (#7259)
- Added display metrics (DPI, density, refresh rate, orientation) via JNI.
Used by the example to set main_scale from actual device density instead
of hardcoded 2.0f.
- BREAKING CHANGE: ImGui_ImplAndroid_Init() now takes additional
asset_manager and native_activity parameters. See before/after in header.
Example (main.cpp):
- Removed ShowSoftKeyboardInput() and PollUnicodeChars() JNI helpers (~120 lines).
- Removed their forward declarations and per-frame calls.
- Updated Init() call to new signature.
- Use ImGui_ImplAndroid_GetDisplayMetrics() for main_scale.
- All other comments, EGL block, GetAssetData, APP_CMD cases unchanged.
MainActivity.kt: unchanged (same 3 JNI bridge methods, now called by backend).
docs/CHANGELOG.txt: Added entries for backend and example changes.
Backend improvements (imgui_impl_android.h/.cpp):
- Moved JNI soft-keyboard and Unicode char polling from the example into the backend.
The backend automatically shows/hides the soft keyboard based on io.WantTextInput
during NewFrame().
- Moved JNI Unicode character polling from the example into the backend.
Characters are polled and fed to io.AddInputCharacter() automatically.
- Added clipboard support via JNI to Android ClipboardManager.
io.SetClipboardTextFn / io.GetClipboardTextFn are now set by the backend.
- Added ImGui_ImplAndroid_ShowSoftKeyboard() / HideSoftKeyboard() public API.
- Init() now accepts optional asset_manager and native_activity params.
When native_activity is provided, JNI features are enabled automatically.
When nullptr, the backend degrades gracefully (no keyboard/clipboard).
- Added sensor support via NDK ASensor API (no JNI needed):
Accelerometer, Gyroscope, Magnetometer, Light, Proximity, Pressure,
Humidity, Ambient Temperature.
API: EnableSensor(), DisableSensor(), GetSensorData(), IsSensorAvailable().
Sensor events are drained non-blocking in NewFrame().
- Added display metrics via JNI:
DPI, density, xdpi/ydpi, refresh rate, orientation, resolution.
API: GetDisplayMetrics().
Used to auto-scale ImGui style to the device's actual density.
Example cleanup (main.cpp):
- Removed ~120 lines of JNI boilerplate (ShowSoftKeyboardInput, PollUnicodeChars,
GetAssetData). The example is now a clean Init -> Loop -> Render -> Shutdown.
- Single ImGui_ImplAndroid_Init() call passes the activity object; the backend
handles the rest.
- Added sensor window: live accelerometer, gyroscope, magnetometer, light, proximity
readouts with visual progress bars.
- Added display window: resolution, DPI, density, refresh rate, orientation.
- Uses actual device density for style scaling instead of hardcoded 2.0f.
CMakeLists.txt: added 'sensor' to target_link_libraries for ASensor API.
Kotlin activity (MainActivity.kt):
- Kept the three JNI-bridge methods (showSoftInput/hideSoftInput/pollUnicodeChar)
since Android's native API does not provide these. Cleaned up and documented
that they are called by the backend, not by app code.
