/**
* Posts a pointer event to the dispatch queue.
*
* @param event The event to post.
* @param webKitXOffset X offset to apply to events before dispatching them to web kit.
* @param webKitYOffset Y offset to apply to events before dispatching them to web kit.
* @param webKitScale The scale factor to apply to translated events before dispatching them to
* web kit.
* @return True if the dispatcher will handle the event, false if the event is unsupported.
*/
public boolean postPointerEvent(
MotionEvent event, int webKitXOffset, int webKitYOffset, float webKitScale) {
if (event == null) {
throw new IllegalArgumentException("event cannot be null");
}
if (DEBUG) {
Log.d(TAG, "postPointerEvent: " + event);
}
final int action = event.getActionMasked();
final int eventType;
switch (action) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_DOWN:
case MotionEvent.ACTION_POINTER_UP:
case MotionEvent.ACTION_CANCEL:
eventType = EVENT_TYPE_TOUCH;
break;
case MotionEvent.ACTION_SCROLL:
eventType = EVENT_TYPE_SCROLL;
break;
case MotionEvent.ACTION_HOVER_ENTER:
case MotionEvent.ACTION_HOVER_MOVE:
case MotionEvent.ACTION_HOVER_EXIT:
eventType = EVENT_TYPE_HOVER;
break;
default:
return false; // currently unsupported event type
}
synchronized (mLock) {
// Ensure that the event is consistent and should be delivered.
MotionEvent eventToEnqueue = event;
if (eventType == EVENT_TYPE_TOUCH) {
eventToEnqueue = mPostTouchStream.update(event);
if (eventToEnqueue == null) {
if (DEBUG) {
Log.d(TAG, "postPointerEvent: dropped event " + event);
}
unscheduleLongPressLocked();
unscheduleClickLocked();
hideTapCandidateLocked();
return false;
}
if (action == MotionEvent.ACTION_DOWN && mPostSendTouchEventsToWebKit) {
if (mUiCallbacks.shouldInterceptTouchEvent(eventToEnqueue)) {
mPostDoNotSendTouchEventsToWebKitUntilNextGesture = true;
} else if (mPostDoNotSendTouchEventsToWebKitUntilNextGesture) {
// Recover from a previous web kit timeout.
mPostDoNotSendTouchEventsToWebKitUntilNextGesture = false;
}
}
}
// Copy the event because we need to retain ownership.
if (eventToEnqueue == event) {
eventToEnqueue = event.copy();
}
DispatchEvent d =
obtainDispatchEventLocked(
eventToEnqueue, eventType, 0, webKitXOffset, webKitYOffset, webKitScale);
updateStateTrackersLocked(d, event);
enqueueEventLocked(d);
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) return false;
final View parent = (View) getParent();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
{
// only start tracking when in sweet spot
final boolean acceptDrag;
final boolean acceptLabel;
if (mFollowAxis == VERTICAL) {
acceptDrag = event.getX() > getWidth() - (mSweepPadding.right * 8);
acceptLabel = mLabelLayout != null ? event.getX() < mLabelLayout.getWidth() : false;
} else {
acceptDrag = event.getY() > getHeight() - (mSweepPadding.bottom * 8);
acceptLabel = mLabelLayout != null ? event.getY() < mLabelLayout.getHeight() : false;
}
final MotionEvent eventInParent = event.copy();
eventInParent.offsetLocation(getLeft(), getTop());
// ignore event when closer to a neighbor
for (ChartSweepView neighbor : mNeighbors) {
if (isTouchCloserTo(eventInParent, neighbor)) {
return false;
}
}
if (acceptDrag) {
if (mFollowAxis == VERTICAL) {
mTrackingStart = getTop() - mMargins.top;
} else {
mTrackingStart = getLeft() - mMargins.left;
}
mTracking = event.copy();
mTouchMode = MODE_DRAG;
// starting drag should activate entire chart
if (!parent.isActivated()) {
parent.setActivated(true);
}
return true;
} else if (acceptLabel) {
mTouchMode = MODE_LABEL;
return true;
} else {
mTouchMode = MODE_NONE;
return false;
}
}
case MotionEvent.ACTION_MOVE:
{
if (mTouchMode == MODE_LABEL) {
return true;
}
getParent().requestDisallowInterceptTouchEvent(true);
// content area of parent
final Rect parentContent = getParentContentRect();
final Rect clampRect = computeClampRect(parentContent);
if (clampRect.isEmpty()) return true;
long value;
if (mFollowAxis == VERTICAL) {
final float currentTargetY = getTop() - mMargins.top;
final float requestedTargetY = mTrackingStart + (event.getRawY() - mTracking.getRawY());
final float clampedTargetY =
MathUtils.constrain(requestedTargetY, clampRect.top, clampRect.bottom);
setTranslationY(clampedTargetY - currentTargetY);
value = mAxis.convertToValue(clampedTargetY - parentContent.top);
} else {
final float currentTargetX = getLeft() - mMargins.left;
final float requestedTargetX = mTrackingStart + (event.getRawX() - mTracking.getRawX());
final float clampedTargetX =
MathUtils.constrain(requestedTargetX, clampRect.left, clampRect.right);
setTranslationX(clampedTargetX - currentTargetX);
value = mAxis.convertToValue(clampedTargetX - parentContent.left);
}
// round value from drag to nearest increment
value -= value % mDragInterval;
setValue(value);
dispatchOnSweep(false);
return true;
}
case MotionEvent.ACTION_UP:
{
if (mTouchMode == MODE_LABEL) {
performClick();
} else if (mTouchMode == MODE_DRAG) {
mTrackingStart = 0;
mTracking = null;
mValue = mLabelValue;
dispatchOnSweep(true);
setTranslationX(0);
setTranslationY(0);
requestLayout();
}
mTouchMode = MODE_NONE;
return true;
}
default:
{
return false;
}
}
}
