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app/src/main/java/com/hippo/nimingban/widget/MarqueeReplyView.java
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| /* | ||
| * Copyright 2016 Hippo Seven | ||
| * | ||
| * 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. | ||
| */ | ||
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| package com.hippo.nimingban.widget; | ||
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| /* | ||
| * Created by Hippo on 12/5/2016. | ||
| */ | ||
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| import android.content.Context; | ||
| import android.graphics.Canvas; | ||
| import android.util.AttributeSet; | ||
| import android.view.LayoutInflater; | ||
| import android.view.View; | ||
| import android.widget.TextSwitcher; | ||
| import android.widget.ViewSwitcher; | ||
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| import com.hippo.nimingban.R; | ||
| import com.hippo.nimingban.client.data.Reply; | ||
| import com.hippo.yorozuya.MathUtils; | ||
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| public class MarqueeReplyView extends TextSwitcher { | ||
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| private Reply[] mReplies; | ||
| private int mIndex; | ||
| private boolean mCanUpdate; | ||
| private boolean mShouldUpdate; | ||
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| private final Runnable mInvalidateTask = new Runnable() { | ||
| @Override | ||
| public void run() { | ||
| mShouldUpdate = true; | ||
| invalidate(); | ||
| } | ||
| }; | ||
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| private final ViewSwitcher.ViewFactory mReplyViewFactory = new ViewSwitcher.ViewFactory() { | ||
| @Override | ||
| public View makeView() { | ||
| return LayoutInflater.from(getContext()).inflate( | ||
| R.layout.item_list_reply, MarqueeReplyView.this, false); | ||
| } | ||
| }; | ||
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| public MarqueeReplyView(Context context) { | ||
| super(context); | ||
| init(); | ||
| } | ||
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| public MarqueeReplyView(Context context, AttributeSet attrs) { | ||
| super(context, attrs); | ||
| init(); | ||
| } | ||
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| private void init() { | ||
| setWillNotDraw(false); | ||
| setFactory(mReplyViewFactory); | ||
| } | ||
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| private boolean canMarquee() { | ||
| return mReplies != null && mReplies.length > 0; | ||
| } | ||
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| private long getMarqueeInterval() { | ||
| return MathUtils.random(3000, 5001); | ||
| } | ||
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| private void nextMarquee() { | ||
| stopMarquee(); | ||
| if (canMarquee()) { | ||
| mCanUpdate = true; | ||
| postDelayed(mInvalidateTask, getMarqueeInterval()); | ||
| } | ||
| } | ||
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| private void stopMarquee() { | ||
| mCanUpdate = false; | ||
| removeCallbacks(mInvalidateTask); | ||
| } | ||
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| public void setReplies(Reply[] replies) { | ||
| mReplies = replies; | ||
| mIndex = 0; | ||
| mCanUpdate = false; | ||
| mShouldUpdate = false; | ||
| if (replies != null && replies.length > 0) { | ||
| setCurrentText(replies[0].getNMBDisplayContent()); | ||
| } else { | ||
| setCurrentText(null); | ||
| } | ||
| nextMarquee(); | ||
| } | ||
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| @Override | ||
| protected void onDraw(Canvas canvas) { | ||
| super.onDraw(canvas); | ||
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| if (mCanUpdate && mShouldUpdate && canMarquee()) { | ||
| mIndex = (mIndex + 1) % mReplies.length; | ||
| setText(mReplies[mIndex].getNMBDisplayContent()); | ||
| nextMarquee(); | ||
| } | ||
| mShouldUpdate = false; | ||
| } | ||
| } |
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