53 lines
1.9 KiB
Java
53 lines
1.9 KiB
Java
/*
|
|
* Copyright 2017 Martijn Brekhof. All rights reserved.
|
|
*
|
|
* 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 org.xbmc.kore.ui.behaviors;
|
|
|
|
import android.content.Context;
|
|
|
|
import androidx.annotation.NonNull;
|
|
import androidx.coordinatorlayout.widget.CoordinatorLayout;
|
|
import androidx.core.view.ViewCompat;
|
|
import android.util.AttributeSet;
|
|
import android.view.View;
|
|
|
|
public class FadeOutOnVerticalScrollBehavior extends CoordinatorLayout.Behavior {
|
|
|
|
private int maxScroll = 0;
|
|
private int currentScroll;
|
|
|
|
public FadeOutOnVerticalScrollBehavior(Context context, AttributeSet attrs) {
|
|
super(context, attrs);
|
|
}
|
|
|
|
@Override
|
|
public boolean onStartNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull View child, @NonNull View directTargetChild, @NonNull View target, int axes, int type) {
|
|
if ( axes == ViewCompat.SCROLL_AXIS_VERTICAL ) {
|
|
if (maxScroll == 0)
|
|
maxScroll = child.getHeight();
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public void onNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull View child, @NonNull View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) {
|
|
currentScroll += dyConsumed;
|
|
child.setAlpha((float) ((maxScroll - currentScroll) / (double) maxScroll));
|
|
}
|
|
}
|