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/*
* Copyright (C) 2015 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 com.android.tv.guide;
import android.content.Context;
import android.util.AttributeSet;
public class TimelineRow extends TimelineGridView {
private static final float FADING_EDGE_STRENGTH_START = 1.0f;
private int mScrollPosition;
public TimelineRow(Context context) {
this(context, null);
}
public TimelineRow(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TimelineRow(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void resetScroll() {
getLayoutManager().scrollToPosition(0);
}
/** Returns the current scroll position */
public int getScrollOffset() {
return Math.abs(mScrollPosition);
}
/** Scrolls horizontally to the given position. */
public void scrollTo(int scrollOffset, boolean smoothScroll) {
int dx =
(scrollOffset - getScrollOffset())
* (getLayoutDirection() == LAYOUT_DIRECTION_LTR ? 1 : -1);
if (smoothScroll) {
smoothScrollBy(dx, 0);
} else {
scrollBy(dx, 0);
}
}
@Override
public void onRtlPropertiesChanged(int layoutDirection) {
super.onRtlPropertiesChanged(layoutDirection);
// Reset scroll
if (isAttachedToWindow()) {
scrollTo(getScrollOffset(), false);
}
}
@Override
public void onScrolled(int dx, int dy) {
if (dx == 0 && dy == 0) {
mScrollPosition = 0;
} else {
mScrollPosition += dx;
}
}
@Override
protected float getLeftFadingEdgeStrength() {
return (getLayoutDirection() == LAYOUT_DIRECTION_LTR) ? FADING_EDGE_STRENGTH_START : 0;
}
@Override
protected float getRightFadingEdgeStrength() {
return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? FADING_EDGE_STRENGTH_START : 0;
}
}
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