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/*
* Copyright (C) 2017 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 android.support.car.drawer;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.car.R;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
/**
* Re-usable {@link RecyclerView.ViewHolder} for displaying items in the
* {@link android.support.car.drawer.CarDrawerAdapter}.
*/
public class DrawerItemViewHolder extends RecyclerView.ViewHolder {
private final ImageView mIcon;
private final TextView mTitle;
private final TextView mText;
private final ImageView mEndIcon;
DrawerItemViewHolder(View view) {
super(view);
mIcon = view.findViewById(R.id.icon);
if (mIcon == null) {
throw new IllegalArgumentException("Icon view cannot be null!");
}
mTitle = view.findViewById(R.id.title);
if (mTitle == null) {
throw new IllegalArgumentException("Title view cannot be null!");
}
// Next two are optional and may be null.
mText = view.findViewById(R.id.text);
mEndIcon = view.findViewById(R.id.end_icon);
}
/** Returns the view that should be used to display the main icon. */
@NonNull
public ImageView getIcon() {
return mIcon;
}
/** Returns the view that will display the main title. */
@NonNull
public TextView getTitle() {
return mTitle;
}
/** Returns the view that is used for text that is smaller than the title text. */
@Nullable
public TextView getText() {
return mText;
}
/** Returns the icon that is displayed at the end of the view. */
@Nullable
public ImageView getEndIcon() {
return mEndIcon;
}
/**
* Sets the listener that will be notified when the view held by this ViewHolder has been
* clicked. Passing {@code null} will clear any previously set listeners.
*/
void setItemClickListener(@Nullable DrawerItemClickListener listener) {
itemView.setOnClickListener(listener != null
? v -> listener.onItemClick(getAdapterPosition())
: null);
}
}
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