wireguard-android/app/src/main/java/com/wireguard/android/BindingAdapters.java
Samuel Holland 353028420b Add an adapter for binding an ObservableList to a LinearLayout
EditTexts do not work in ListViews.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-08-22 23:10:35 -05:00

104 lines
4.4 KiB
Java

package com.wireguard.android;
import android.databinding.BindingAdapter;
import android.databinding.ObservableList;
import android.databinding.adapters.ListenerUtil;
import android.graphics.Typeface;
import android.text.InputFilter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
/**
* Static methods for use by generated code in the Android data binding library.
*/
@SuppressWarnings("unused")
public final class BindingAdapters {
@BindingAdapter({"items", "layout"})
public static <T> void setItems(final LinearLayout view,
final ObservableList<T> oldList, final int oldLayoutId,
final ObservableList<T> newList, final int newLayoutId) {
if (oldList == newList && oldLayoutId == newLayoutId)
return;
ItemChangeListener<T> listener = ListenerUtil.getListener(view, R.id.item_change_listener);
// If the layout changes, any existing listener must be replaced.
if (listener != null && oldList != null && oldLayoutId != newLayoutId) {
listener.setList(null);
listener = null;
}
// Avoid adding a listener when there is no new list or layout.
if (newList == null || newLayoutId == 0)
return;
if (listener == null) {
listener = new ItemChangeListener<>(view, newLayoutId);
ListenerUtil.trackListener(view, listener, R.id.item_change_listener);
}
// Either the list changed, or this is an entirely new listener because the layout changed.
listener.setList(newList);
}
@BindingAdapter({"items", "layout"})
public static <T> void setItems(final ListView view,
final ObservableList<T> oldList, final int oldLayoutId,
final ObservableList<T> newList, final int newLayoutId) {
// Remove any existing binding when there is no new list or layout.
if (newList == null || newLayoutId == 0) {
view.setAdapter(null);
return;
}
// The ListAdapter interface is not generic, so this cannot be checked.
@SuppressWarnings("unchecked")
ObservableListAdapter<T> adapter = (ObservableListAdapter<T>) view.getAdapter();
// If the layout changes, any existing adapter must be replaced.
if (newLayoutId != oldLayoutId)
adapter = null;
// Add a new binding if there was none, or if it must be replaced due to a layout change.
if (adapter == null) {
view.setAdapter(new ObservableListAdapter<>(view.getContext(), newLayoutId, newList));
} else if (newList != oldList) {
// Changing the list only requires modifying the existing adapter.
adapter.setList(newList);
}
}
@BindingAdapter({"items", "layout"})
public static <K extends Comparable<K>, V> void setItems(
final ListView view,
final ObservableSortedMap<K, V> oldMap, final int oldLayoutId,
final ObservableSortedMap<K, V> newMap, final int newLayoutId) {
// Remove any existing binding when there is no new map or layout.
if (newMap == null || newLayoutId == 0) {
view.setAdapter(null);
return;
}
// The ListAdapter interface is not generic, so this cannot be checked.
@SuppressWarnings("unchecked")
ObservableMapAdapter<K, V> adapter = (ObservableMapAdapter<K, V>) view.getAdapter();
// If the layout changes, any existing adapter must be replaced.
if (newLayoutId != oldLayoutId)
adapter = null;
// Add a new binding if there was none, or if it must be replaced due to a layout change.
if (adapter == null) {
view.setAdapter(new ObservableMapAdapter<>(view.getContext(), newLayoutId, newMap));
} else if (newMap != oldMap) {
// Changing the list only requires modifying the existing adapter.
adapter.setMap(newMap);
}
}
@BindingAdapter({"filter"})
public static void setFilter(final TextView view, final InputFilter filter) {
view.setFilters(new InputFilter[]{filter});
}
@BindingAdapter({"android:textStyle"})
public static void setTextStyle(final TextView view, final Typeface typeface) {
view.setTypeface(typeface);
}
private BindingAdapters() {
// Prevent instantiation.
}
}