@Override
public boolean dispatchTouchEvent(MotionEvent event) {
if (!onFilterTouchEventForSecurity(event)) return false;
mLastMotionEvent = event;
int action = event.getAction();
double dx = event.getX() - mCenterX;
double dy = mCenterY - event.getY();
double radius = Math.sqrt(dx * dx + dy * dy);
// Ignore the event if too far from the shutter button.
if ((radius <= (mWheelRadius + mStrokeWidth)) && (radius > mShutterButtonRadius)) {
double delta = Math.atan2(dy, dx);
if (delta < 0) delta += Math.PI * 2;
int index = getTouchIndicatorIndex(delta);
// Check if the touch event is for zoom control.
if ((mZoomControl != null) && (index == 0)) {
mZoomControl.dispatchTouchEvent(event);
}
// Move over from one indicator to another.
if ((index != mPressedIndex) || (action == MotionEvent.ACTION_DOWN)) {
if (mPressedIndex != -1) {
injectMotionEvent(mPressedIndex, event, MotionEvent.ACTION_CANCEL);
} else {
// Cancel the popup if it is different from the selected.
if (getSelectedIndicatorIndex() != index) dismissSettingPopup();
}
if ((index != -1) && (action == MotionEvent.ACTION_MOVE)) {
if (mCurrentLevel != 0) {
injectMotionEvent(index, event, MotionEvent.ACTION_DOWN);
}
}
}
if ((index != -1) && (action != MotionEvent.ACTION_MOVE)) {
getChildAt(index).dispatchTouchEvent(event);
}
// Do not highlight the CameraPicker or Settings icon if we
// touch from the zoom control to one of them.
if ((mCurrentLevel == 0) && (index != 0) && (action == MotionEvent.ACTION_MOVE)) {
return true;
}
// Once the button is up, reset the press index.
mPressedIndex = (action == MotionEvent.ACTION_UP) ? -1 : index;
invalidate();
return true;
}
// The event is not on any of the child.
onTouchOutBound();
return false;
}
public void onTouchOutBound() {
dismissSettingPopup();
if (mPressedIndex != -1) {
injectMotionEvent(mPressedIndex, mLastMotionEvent, MotionEvent.ACTION_CANCEL);
mPressedIndex = -1;
invalidate();
}
}