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/*
* Copyright (C) 2014 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.graphics.Typeface;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.android.systemui.R;
import java.util.Objects;
public class SegmentedButtons extends LinearLayout {
private static final int LABEL_RES_KEY = R.id.label;
private static final Typeface REGULAR = Typeface.create("sans-serif", Typeface.NORMAL);
private static final Typeface MEDIUM = Typeface.create("sans-serif-medium", Typeface.NORMAL);
private final Context mContext;
private final LayoutInflater mInflater;
private final SpTexts mSpTexts;
private Callback mCallback;
private Object mSelectedValue;
public SegmentedButtons(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
mInflater = LayoutInflater.from(mContext);
setOrientation(HORIZONTAL);
mSpTexts = new SpTexts(mContext);
}
public void setCallback(Callback callback) {
mCallback = callback;
}
public Object getSelectedValue() {
return mSelectedValue;
}
public void setSelectedValue(Object value, boolean fromClick) {
if (Objects.equals(value, mSelectedValue)) return;
mSelectedValue = value;
for (int i = 0; i < getChildCount(); i++) {
final TextView c = (TextView) getChildAt(i);
final Object tag = c.getTag();
final boolean selected = Objects.equals(mSelectedValue, tag);
c.setSelected(selected);
c.setTypeface(selected ? MEDIUM : REGULAR);
}
fireOnSelected(fromClick);
}
public void addButton(int labelResId, int contentDescriptionResId, Object value) {
final Button b = (Button) mInflater.inflate(R.layout.segmented_button, this, false);
b.setTag(LABEL_RES_KEY, labelResId);
b.setText(labelResId);
b.setContentDescription(getResources().getString(contentDescriptionResId));
final LayoutParams lp = (LayoutParams) b.getLayoutParams();
if (getChildCount() == 0) {
lp.leftMargin = lp.rightMargin = 0; // first button has no margin
}
b.setLayoutParams(lp);
addView(b);
b.setTag(value);
b.setOnClickListener(mClick);
Interaction.register(b, new Interaction.Callback() {
@Override
public void onInteraction() {
fireInteraction();
}
});
mSpTexts.add(b);
}
public void updateLocale() {
for (int i = 0; i < getChildCount(); i++) {
final Button b = (Button) getChildAt(i);
final int labelResId = (Integer) b.getTag(LABEL_RES_KEY);
b.setText(labelResId);
}
}
private void fireOnSelected(boolean fromClick) {
if (mCallback != null) {
mCallback.onSelected(mSelectedValue, fromClick);
}
}
private void fireInteraction() {
if (mCallback != null) {
mCallback.onInteraction();
}
}
private final View.OnClickListener mClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
setSelectedValue(v.getTag(), true /* fromClick */);
}
};
public interface Callback extends Interaction.Callback {
void onSelected(Object value, boolean fromClick);
}
}
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