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/*
* Copyright (C) 2020 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.documentsui;
import static androidx.core.util.Preconditions.checkNotNull;
import androidx.recyclerview.selection.SelectionTracker;
import androidx.recyclerview.selection.SelectionTracker.SelectionObserver;
/**
* A controller that listens to selection changes and controls profile tabs behavior.
*/
public class ProfileTabsController extends SelectionObserver<String> {
private static final String TAG = "ProfileTabsController";
private final SelectionTracker<String> mSelectionMgr;
private final ProfileTabsAddons mProfileTabsAddons;
public ProfileTabsController(
SelectionTracker<String> selectionMgr,
ProfileTabsAddons profileTabsAddons) {
mSelectionMgr = checkNotNull(selectionMgr);
mProfileTabsAddons = checkNotNull(profileTabsAddons);
}
@Override
public void onSelectionChanged() {
onSelectionUpdated();
}
@Override
public void onSelectionRestored() {
onSelectionUpdated();
}
private void onSelectionUpdated() {
mProfileTabsAddons.setEnabled(mSelectionMgr.getSelection().isEmpty());
}
}
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