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Synthesize touch events for hybrid views #19427

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Jul 2, 2020
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Synthesize touch events for hybrid views #19427

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67 changes: 37 additions & 30 deletions shell/platform/android/io/flutter/plugin/platform/PlatformViewsController.java
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Original file line number Diff line number Diff line change
Expand Up @@ -244,37 +244,18 @@ public void run() {

@Override
public void onTouch(@NonNull PlatformViewsChannel.PlatformViewTouch touch) {
PointerProperties[] pointerProperties =
parsePointerPropertiesList(touch.rawPointerPropertiesList)
.toArray(new PointerProperties[touch.pointerCount]);
PointerCoords[] pointerCoords =
parsePointerCoordsList(touch.rawPointerCoords, getDisplayDensity())
.toArray(new PointerCoords[touch.pointerCount]);

if (!vdControllers.containsKey(touch.viewId)) {
throw new IllegalStateException(
"Sending touch to an unknown view with id: " + touch.viewId);
}

MotionEvent event =
MotionEvent.obtain(
touch.downTime.longValue(),
touch.eventTime.longValue(),
touch.action,
touch.pointerCount,
pointerProperties,
pointerCoords,
touch.metaState,
touch.buttonState,
touch.xPrecision,
touch.yPrecision,
touch.deviceId,
touch.edgeFlags,
touch.source,
touch.flags);

final int viewId = touch.viewId;
float density = context.getResources().getDisplayMetrics().density;
ensureValidAndroidVersion(Build.VERSION_CODES.KITKAT_WATCH);
vdControllers.get(touch.viewId).dispatchTouchEvent(event);
final MotionEvent event = toMotionEvent(density, touch);
if (vdControllers.containsKey(viewId)) {
vdControllers.get(touch.viewId).dispatchTouchEvent(event);
} else if (platformViews.get(viewId) != null) {
View view = platformViews.get(touch.viewId);
view.dispatchTouchEvent(event);
} else {
throw new IllegalStateException("Sending touch to an unknown view with id: " + viewId);
}
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
Expand Down Expand Up @@ -317,6 +298,32 @@ private void ensureValidAndroidVersion(int minSdkVersion) {
}
};

private static MotionEvent toMotionEvent(
float density, PlatformViewsChannel.PlatformViewTouch touch) {
PointerProperties[] pointerProperties =
parsePointerPropertiesList(touch.rawPointerPropertiesList)
.toArray(new PointerProperties[touch.pointerCount]);
PointerCoords[] pointerCoords =
parsePointerCoordsList(touch.rawPointerCoords, density)
.toArray(new PointerCoords[touch.pointerCount]);

return MotionEvent.obtain(
touch.downTime.longValue(),
touch.eventTime.longValue(),
touch.action,
touch.pointerCount,
pointerProperties,
pointerCoords,
touch.metaState,
touch.buttonState,
touch.xPrecision,
touch.yPrecision,
touch.deviceId,
touch.edgeFlags,
touch.source,
touch.flags);
Comment on lines +317 to +324
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It looks like we don't pass any of these values :/ flutter/flutter#60320 (comment)

}

public PlatformViewsController() {
registry = new PlatformViewRegistryImpl();
vdControllers = new HashMap<>();
Expand Down