diff options
Diffstat (limited to 'src/com/android/launcher3/settings/PreferenceHighlighter.java')
-rw-r--r-- | src/com/android/launcher3/settings/PreferenceHighlighter.java | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/com/android/launcher3/settings/PreferenceHighlighter.java b/src/com/android/launcher3/settings/PreferenceHighlighter.java new file mode 100644 index 000000000..4ed4cf113 --- /dev/null +++ b/src/com/android/launcher3/settings/PreferenceHighlighter.java @@ -0,0 +1,127 @@ +/* + * Copyright (C) 2018 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.launcher3.settings; + +import static androidx.core.graphics.ColorUtils.setAlphaComponent; + +import android.animation.Animator; +import android.animation.AnimatorListenerAdapter; +import android.animation.ObjectAnimator; +import android.animation.ValueAnimator; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.Paint; +import android.util.Property; +import android.view.View; + +import com.android.launcher3.util.Themes; + +import androidx.recyclerview.widget.RecyclerView; +import androidx.recyclerview.widget.RecyclerView.ItemDecoration; +import androidx.recyclerview.widget.RecyclerView.State; +import androidx.recyclerview.widget.RecyclerView.ViewHolder; + +/** + * Utility class for highlighting a preference + */ +public class PreferenceHighlighter extends ItemDecoration implements Runnable { + + private static final Property<PreferenceHighlighter, Integer> HIGHLIGHT_COLOR = + new Property<PreferenceHighlighter, Integer>(Integer.TYPE, "highlightColor") { + + @Override + public Integer get(PreferenceHighlighter highlighter) { + return highlighter.mHighlightColor; + } + + @Override + public void set(PreferenceHighlighter highlighter, Integer value) { + highlighter.mHighlightColor = value; + highlighter.mRv.invalidateItemDecorations(); + } + }; + + private static final long HIGHLIGHT_DURATION = 15000L; + private static final long HIGHLIGHT_FADE_OUT_DURATION = 500L; + private static final long HIGHLIGHT_FADE_IN_DURATION = 200L; + private static final int END_COLOR = setAlphaComponent(Color.WHITE, 0); + + private final Paint mPaint = new Paint(); + private final RecyclerView mRv; + private final int mIndex; + + private boolean mHighLightStarted = false; + private int mHighlightColor = END_COLOR; + + + public PreferenceHighlighter(RecyclerView rv, int index) { + mRv = rv; + mIndex = index; + } + + @Override + public void run() { + mRv.addItemDecoration(this); + mRv.smoothScrollToPosition(mIndex); + } + + @Override + public void onDraw(Canvas c, RecyclerView parent, State state) { + ViewHolder holder = parent.findViewHolderForAdapterPosition(mIndex); + if (holder == null) { + return; + } + if (!mHighLightStarted && state.getRemainingScrollVertical() != 0) { + // Wait until scrolling stopped + return; + } + + if (!mHighLightStarted) { + // Start highlight + int colorTo = setAlphaComponent(Themes.getColorAccent(mRv.getContext()), 66); + ObjectAnimator anim = ObjectAnimator.ofArgb(this, HIGHLIGHT_COLOR, END_COLOR, colorTo); + anim.setDuration(HIGHLIGHT_FADE_IN_DURATION); + anim.setRepeatMode(ValueAnimator.REVERSE); + anim.setRepeatCount(4); + anim.addListener(new AnimatorListenerAdapter() { + @Override + public void onAnimationEnd(Animator animation) { + removeHighlight(); + } + }); + anim.start(); + mHighLightStarted = true; + } + + View view = holder.itemView; + mPaint.setColor(mHighlightColor); + c.drawRect(0, view.getY(), parent.getWidth(), view.getY() + view.getHeight(), mPaint); + } + + private void removeHighlight() { + ObjectAnimator anim = ObjectAnimator.ofArgb( + this, HIGHLIGHT_COLOR, mHighlightColor, END_COLOR); + anim.setDuration(HIGHLIGHT_FADE_OUT_DURATION); + anim.setStartDelay(HIGHLIGHT_DURATION); + anim.addListener(new AnimatorListenerAdapter() { + @Override + public void onAnimationEnd(Animator animation) { + mRv.removeItemDecoration(PreferenceHighlighter.this); + } + }); + anim.start(); + } +} |