| /* |
| * Copyright (C) 2012 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.widget; |
| |
| import android.util.ValueModel; |
| |
| /** |
| * An interface for editors of simple values. Classes implementing this interface are normally |
| * UI controls (subclasses of {@link android.view.View View}) that can provide a suitable |
| * user interface to display and edit values of the specified type. This interface is |
| * intended to describe editors for simple types, like {@code boolean}, {@code int} or |
| * {@code String}, where the values themselves are immutable. |
| * <p> |
| * For example, {@link android.widget.CheckBox CheckBox} implements |
| * this interface for the Boolean type as it is capable of providing an appropriate |
| * mechanism for displaying and changing the value of a Boolean property. |
| * |
| * @param <T> the value type that this editor supports |
| */ |
| public interface ValueEditor<T> { |
| /** |
| * Return the last value model that was set. If no value model has been set, the editor |
| * should return the value {@link android.util.ValueModel#EMPTY}. |
| * |
| * @return the value model |
| */ |
| public ValueModel<T> getValueModel(); |
| |
| /** |
| * Sets the value model for this editor. When the value model is set, the editor should |
| * retrieve the value from the value model, using {@link android.util.ValueModel#get()}, |
| * and set its internal state accordingly. Likewise, when the editor's internal state changes |
| * it should update the value model by calling {@link android.util.ValueModel#set(T)} |
| * with the appropriate value. |
| * |
| * @param valueModel the new value model for this editor. |
| */ |
| public void setValueModel(ValueModel<T> valueModel); |
| } |