| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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.intellij.util.ui.table; |
| |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.awt.*; |
| import java.util.List; |
| |
| /** |
| * @author Aleksey Pivovarov |
| */ |
| public abstract class ComponentsListFocusTraversalPolicy extends FocusTraversalPolicy { |
| @Override |
| public Component getComponentAfter(Container aContainer, Component aComponent) { |
| final List<Component> components = getOrderedComponents(); |
| int i = components.indexOf(aComponent); |
| if (i != -1) { |
| i++; |
| if (i >= components.size()) { |
| i = 0; |
| } |
| return components.get(i); |
| } |
| return null; |
| } |
| |
| @Override |
| public Component getComponentBefore(Container aContainer, Component aComponent) { |
| final List<Component> components = getOrderedComponents(); |
| int i = components.indexOf(aComponent); |
| if (i != -1) { |
| i--; |
| if (i == -1) { |
| i = components.size() - 1; |
| } |
| return components.get(i); |
| } |
| return null; |
| } |
| |
| @Override |
| public Component getFirstComponent(Container aContainer) { |
| final List<Component> components = getOrderedComponents(); |
| return components.isEmpty() ? null : components.get(0); |
| } |
| |
| @Override |
| public Component getLastComponent(Container aContainer) { |
| final List<Component> components = getOrderedComponents(); |
| return components.isEmpty() ? null : components.get(components.size() - 1); |
| } |
| |
| @Override |
| public Component getDefaultComponent(Container aContainer) { |
| final List<Component> components = getOrderedComponents(); |
| return components.isEmpty() ? null : components.get(0); |
| } |
| |
| @NotNull |
| protected abstract List<Component> getOrderedComponents(); |
| } |