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feat(touch): add press/release detection with touch-down tracking

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This commit is contained in:
David Gwilliam
2026-02-18 13:08:56 -08:00
parent 1961631e2c
commit 9f7a383b38
7 changed files with 166 additions and 41 deletions
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24
boards/esp32-s3-lcd-43/DisplayDriverGFX.cpp
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@@ -68,16 +68,36 @@ TouchEvent DisplayDriverGFX::readTouch() {
int32_t x, y;
bool pressed = _gfx->getTouch(&x, &y);
// Only report NEW touches (debounce - ignore held touches)
evt.pressed = pressed && !_lastTouch.pressed;
// Detect transitions (press/release)
if(pressed && !_lastTouch.pressed) {
// Press transition: finger just touched down
evt.pressed = true;
evt.downX = static_cast<int>(x);
evt.downY = static_cast<int>(y);
_lastTouch.downX = evt.downX;
_lastTouch.downY = evt.downY;
} else if(!pressed && _lastTouch.pressed) {
// Release transition: finger just lifted
evt.released = true;
evt.downX = _lastTouch.downX;
evt.downY = _lastTouch.downY;
}
// Current position if still touched
if(pressed) {
evt.x = static_cast<int>(x);
evt.y = static_cast<int>(y);
evt.downX = _lastTouch.downX;
evt.downY = _lastTouch.downY;
_pressStartMs = millis();
}
// Track previous state
_lastTouch.pressed = pressed;
if(pressed) {
_lastTouch.x = evt.x;
_lastTouch.y = evt.y;
}
return evt;
}

2
boards/esp32-s3-lcd-43/DisplayDriverGFX.h
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@@ -28,7 +28,7 @@ private:
void drawDashboard(const ScreenState& state);
// Touch handling
TouchEvent _lastTouch = { false, 0, 0 };
TouchEvent _lastTouch = { false, false, 0, 0, -1, -1 };
unsigned long _pressStartMs = 0;
bool _isHolding = false;