/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.systemui.volume;
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import android.content.Context;
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import android.graphics.Typeface;
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import android.util.AttributeSet;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.widget.Button;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import com.android.systemui.R;
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import java.util.Objects;
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public class SegmentedButtons extends LinearLayout {
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private static final int LABEL_RES_KEY = R.id.label;
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private static final Typeface REGULAR = Typeface.create("sans-serif", Typeface.NORMAL);
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private static final Typeface MEDIUM = Typeface.create("sans-serif-medium", Typeface.NORMAL);
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private final Context mContext;
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protected final LayoutInflater mInflater;
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private final ConfigurableTexts mConfigurableTexts;
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private Callback mCallback;
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protected Object mSelectedValue;
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public SegmentedButtons(Context context, AttributeSet attrs) {
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super(context, attrs);
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mContext = context;
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mInflater = LayoutInflater.from(mContext);
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setOrientation(HORIZONTAL);
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mConfigurableTexts = new ConfigurableTexts(mContext);
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}
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public void setCallback(Callback callback) {
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mCallback = callback;
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}
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public Object getSelectedValue() {
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return mSelectedValue;
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}
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public void setSelectedValue(Object value, boolean fromClick) {
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if (Objects.equals(value, mSelectedValue)) return;
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mSelectedValue = value;
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for (int i = 0; i < getChildCount(); i++) {
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final TextView c = (TextView) getChildAt(i);
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final Object tag = c.getTag();
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final boolean selected = Objects.equals(mSelectedValue, tag);
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c.setSelected(selected);
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setSelectedStyle(c, selected);
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}
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fireOnSelected(fromClick);
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}
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protected void setSelectedStyle(TextView textView, boolean selected) {
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textView.setTypeface(selected ? MEDIUM : REGULAR);
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}
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public Button inflateButton() {
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return (Button) mInflater.inflate(R.layout.segmented_button, this, false);
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}
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public void addButton(int labelResId, int contentDescriptionResId, Object value) {
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final Button b = inflateButton();
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b.setTag(LABEL_RES_KEY, labelResId);
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b.setText(labelResId);
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b.setContentDescription(getResources().getString(contentDescriptionResId));
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final LayoutParams lp = (LayoutParams) b.getLayoutParams();
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if (getChildCount() == 0) {
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lp.leftMargin = lp.rightMargin = 0; // first button has no margin
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}
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b.setLayoutParams(lp);
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addView(b);
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b.setTag(value);
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b.setOnClickListener(mClick);
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Interaction.register(b, new Interaction.Callback() {
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@Override
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public void onInteraction() {
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fireInteraction();
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}
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});
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mConfigurableTexts.add(b, labelResId);
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}
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public void update() {
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mConfigurableTexts.update();
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}
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private void fireOnSelected(boolean fromClick) {
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if (mCallback != null) {
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mCallback.onSelected(mSelectedValue, fromClick);
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}
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}
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private void fireInteraction() {
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if (mCallback != null) {
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mCallback.onInteraction();
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}
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}
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private final View.OnClickListener mClick = new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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setSelectedValue(v.getTag(), true /* fromClick */);
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}
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};
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public interface Callback extends Interaction.Callback {
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void onSelected(Object value, boolean fromClick);
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}
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}
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