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/*
* Copyright (C) 2015 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.systemui.volume;
import android.content.Context;
import android.content.res.Resources;
import android.util.ArrayMap;
import android.util.TypedValue;
import android.view.View;
import android.view.View.OnAttachStateChangeListener;
import android.widget.TextView;
/**
* Capture initial sp values for registered textviews, and update properly when configuration
* changes.
*/
public class SpTexts {
private final Context mContext;
private final ArrayMap<TextView, Integer> mTexts = new ArrayMap<>();
public SpTexts(Context context) {
mContext = context;
}
public int add(final TextView text) {
if (text == null) return 0;
final Resources res = mContext.getResources();
final float fontScale = res.getConfiguration().fontScale;
final float density = res.getDisplayMetrics().density;
final float px = text.getTextSize();
final int sp = (int)(px / fontScale / density);
mTexts.put(text, sp);
text.addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
@Override
public void onViewDetachedFromWindow(View v) {
}
@Override
public void onViewAttachedToWindow(View v) {
setTextSizeH(text, sp);
}
});
return sp;
}
public void update() {
if (mTexts.isEmpty()) return;
mTexts.keyAt(0).post(mUpdateAll);
}
private void setTextSizeH(TextView text, int sp) {
text.setTextSize(TypedValue.COMPLEX_UNIT_SP, sp);
}
private final Runnable mUpdateAll = new Runnable() {
@Override
public void run() {
for (int i = 0; i < mTexts.size(); i++) {
setTextSizeH(mTexts.keyAt(i), mTexts.valueAt(i));
}
}
};
}
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