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/*
* Copyright (C) 2013 The CyanogenMod 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.launcher3;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.content.Context;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
public class AppDrawerScrubber extends LinearLayout {
private final int SCRUBBER_INDICATOR_DISPLAY_DURATION = 200;
private final float SCRUBBER_INDICATOR_DISPLAY_TRANSLATIONY = 20f;
private AppDrawerListAdapter mAdapter;
private RecyclerView mListView;
private TextView mScrubberIndicator;
private SeekBar mSeekBar;
private String[] mSections;
private LinearLayoutManager mLayoutManager;
public AppDrawerScrubber(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public AppDrawerScrubber(Context context) {
super(context);
init(context);
}
public void updateSections() {
mSections = (String[]) mAdapter.getSections();
mSeekBar.setMax(mSections.length - 1);
}
public void setSource(RecyclerView listView) {
mListView = listView;
mAdapter = (AppDrawerListAdapter) listView.getAdapter();
mLayoutManager = (LinearLayoutManager) listView.getLayoutManager();
}
public void setScrubberIndicator(TextView scrubberIndicator) {
mScrubberIndicator = scrubberIndicator;
}
private boolean isReady() {
return mListView != null &&
mAdapter != null &&
mSections != null;
}
private void init(Context context) {
LayoutInflater.from(context).inflate(R.layout.scrub_layout, this);
mSeekBar = (SeekBar) findViewById(R.id.scrubber);
mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, final int progress, boolean fromUser) {
if (!isReady()) {
return;
}
resetScrubber();
String section = String.valueOf(mSections[progress]);
if (mScrubberIndicator != null) {
float translateX = (progress * seekBar.getWidth()) / mSections.length;
translateX -= (mScrubberIndicator.getWidth() / 6); // offset for alignment
mScrubberIndicator.setTranslationX(translateX);
mScrubberIndicator.setText(section);
}
mLayoutManager.scrollToPositionWithOffset(
mAdapter.getPositionForSection(progress), 0);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
resetScrubber();
if (mScrubberIndicator != null) {
mScrubberIndicator.setAlpha(1f);
mScrubberIndicator.setVisibility(View.VISIBLE);
}
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
resetScrubber();
if (mScrubberIndicator != null) {
mScrubberIndicator.animate().alpha(0f).translationYBy(20f)
.setDuration(200).setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mScrubberIndicator.setVisibility(View.INVISIBLE);
}
});
}
}
private void resetScrubber() {
if (mScrubberIndicator != null) {
mScrubberIndicator.animate().cancel();
mScrubberIndicator.setTranslationY(0f);
}
}
});
}
}
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