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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 android.databinding.adapters;
import android.databinding.BindingAdapter;
import android.databinding.BindingMethod;
import android.databinding.BindingMethods;
import android.databinding.InverseBindingListener;
import android.databinding.InverseBindingMethod;
import android.databinding.InverseBindingMethods;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
@BindingMethods({
@BindingMethod(type = AdapterView.class, attribute = "android:onItemClick", method = "setOnItemClickListener"),
@BindingMethod(type = AdapterView.class, attribute = "android:onItemLongClick", method = "setOnItemLongClickListener"),
})
@InverseBindingMethods({
@InverseBindingMethod(type = AbsListView.class, attribute = "android:selectedItemPosition"),
})
public class AdapterViewBindingAdapter {
@BindingAdapter("android:selectedItemPosition")
public static void setSelectedItemPosition(AdapterView view, int position) {
if (view.getSelectedItemPosition() != position) {
view.setSelection(position);
}
}
@BindingAdapter(value = {"android:onItemSelected", "android:onNothingSelected",
"android:selectedItemPositionAttrChanged"}, requireAll = false)
public static void setOnItemSelectedListener(AdapterView view, final OnItemSelected selected,
final OnNothingSelected nothingSelected, final InverseBindingListener attrChanged) {
if (selected == null && nothingSelected == null && attrChanged == null) {
view.setOnItemSelectedListener(null);
} else {
view.setOnItemSelectedListener(
new OnItemSelectedComponentListener(selected, nothingSelected, attrChanged));
}
}
public static class OnItemSelectedComponentListener implements OnItemSelectedListener {
private final OnItemSelected mSelected;
private final OnNothingSelected mNothingSelected;
private final InverseBindingListener mAttrChanged;
public OnItemSelectedComponentListener(OnItemSelected selected,
OnNothingSelected nothingSelected, InverseBindingListener attrChanged) {
this.mSelected = selected;
this.mNothingSelected = nothingSelected;
this.mAttrChanged = attrChanged;
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (mSelected != null) {
mSelected.onItemSelected(parent, view, position, id);
}
if (mAttrChanged != null) {
mAttrChanged.onChange();
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
if (mNothingSelected != null) {
mNothingSelected.onNothingSelected(parent);
}
if (mAttrChanged != null) {
mAttrChanged.onChange();
}
}
}
public interface OnItemSelected {
void onItemSelected(AdapterView<?> parent, View view, int position, long id);
}
public interface OnNothingSelected {
void onNothingSelected(AdapterView<?> parent);
}
}
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