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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.view.accessibility;
import android.annotation.NonNull;
import android.view.View;
/**
* Sender for {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event.
*
* @hide
*/
public class SendViewScrolledAccessibilityEvent extends ThrottlingAccessibilityEventSender {
public int mDeltaX;
public int mDeltaY;
/**
* Post a scroll event to be sent for the given view
*/
public void post(View source, int dx, int dy) {
if (!isPendingFor(source)) sendNowIfPending();
mDeltaX += dx;
mDeltaY += dy;
if (!isPendingFor(source)) scheduleFor(source);
}
@Override
protected void performSendEvent(@NonNull View source) {
AccessibilityEvent event = AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_SCROLLED);
event.setScrollDeltaX(mDeltaX);
event.setScrollDeltaY(mDeltaY);
source.sendAccessibilityEventUnchecked(event);
}
@Override
protected void resetState(@NonNull View source) {
mDeltaX = 0;
mDeltaY = 0;
}
}
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