| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to you 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 org.apache.pivot.wtk; |
| |
| import org.apache.pivot.beans.DefaultProperty; |
| import org.apache.pivot.collections.Sequence; |
| import org.apache.pivot.util.ListenerList; |
| import org.apache.pivot.util.Vote; |
| |
| /** |
| * Container that can be expanded or collapsed to respectively show or hide its |
| * content. A rollup has a heading component that is always visible, and when |
| * the user expands the rollup, its content component will be shown beneath the |
| * heading. |
| */ |
| @DefaultProperty("content") |
| public class Rollup extends Container { |
| private static class RollupListenerList extends WTKListenerList<RollupListener> implements |
| RollupListener { |
| @Override |
| public void headingChanged(Rollup rollup, Component previousHeading) { |
| for (RollupListener listener : this) { |
| listener.headingChanged(rollup, previousHeading); |
| } |
| } |
| |
| @Override |
| public void contentChanged(Rollup rollup, Component previousContent) { |
| for (RollupListener listener : this) { |
| listener.contentChanged(rollup, previousContent); |
| } |
| } |
| |
| @Override |
| public void collapsibleChanged(Rollup rollup) { |
| for (RollupListener listener : this) { |
| listener.collapsibleChanged(rollup); |
| } |
| } |
| } |
| |
| private static class RollupStateListenerList extends WTKListenerList<RollupStateListener> |
| implements RollupStateListener { |
| @Override |
| public Vote previewExpandedChange(Rollup rollup) { |
| Vote vote = Vote.APPROVE; |
| |
| for (RollupStateListener listener : this) { |
| vote = vote.tally(listener.previewExpandedChange(rollup)); |
| } |
| |
| return vote; |
| } |
| |
| @Override |
| public void expandedChangeVetoed(Rollup rollup, Vote reason) { |
| for (RollupStateListener listener : this) { |
| listener.expandedChangeVetoed(rollup, reason); |
| } |
| } |
| |
| @Override |
| public void expandedChanged(Rollup rollup) { |
| for (RollupStateListener listener : this) { |
| listener.expandedChanged(rollup); |
| } |
| } |
| } |
| |
| private Component heading = null; |
| private Component content = null; |
| |
| private boolean expanded = true; |
| private boolean collapsible = true; |
| |
| private RollupListenerList rollupListeners = new RollupListenerList(); |
| private RollupStateListenerList rollupStateListeners = new RollupStateListenerList(); |
| |
| public Rollup() { |
| this(false, null); |
| } |
| |
| public Rollup(boolean expanded) { |
| this(expanded, null); |
| } |
| |
| public Rollup(Component content) { |
| this(false, content); |
| } |
| |
| public Rollup(boolean expanded, Component content) { |
| this.expanded = expanded; |
| |
| installSkin(Rollup.class); |
| |
| if (content != null) { |
| setContent(content); |
| } |
| } |
| |
| public Component getHeading() { |
| return heading; |
| } |
| |
| public void setHeading(Component heading) { |
| Component previousHeading = this.heading; |
| |
| if (heading != previousHeading) { |
| // Remove any previous heading component |
| this.heading = null; |
| |
| if (previousHeading != null) { |
| remove(previousHeading); |
| } |
| |
| // Set the new heading component |
| if (heading != null) { |
| add(heading); |
| } |
| |
| this.heading = heading; |
| |
| rollupListeners.headingChanged(this, previousHeading); |
| } |
| } |
| |
| public Component getContent() { |
| return content; |
| } |
| |
| public void setContent(Component content) { |
| Component previousContent = this.content; |
| |
| if (content != previousContent) { |
| // Remove any previous content component |
| this.content = null; |
| |
| if (previousContent != null) { |
| remove(previousContent); |
| } |
| |
| // Set the new content component |
| if (content != null) { |
| add(content); |
| } |
| |
| this.content = content; |
| |
| rollupListeners.contentChanged(this, previousContent); |
| } |
| } |
| |
| public boolean isExpanded() { |
| return expanded; |
| } |
| |
| public void setExpanded(boolean expanded) { |
| if (expanded != this.expanded) { |
| Vote vote = rollupStateListeners.previewExpandedChange(this); |
| |
| if (vote == Vote.APPROVE) { |
| this.expanded = expanded; |
| rollupStateListeners.expandedChanged(this); |
| } else { |
| rollupStateListeners.expandedChangeVetoed(this, vote); |
| } |
| } |
| } |
| |
| public boolean isCollapsible() { |
| return collapsible; |
| } |
| |
| public void setCollapsible(boolean collapsible) { |
| if (this.collapsible != collapsible) { |
| this.collapsible = collapsible; |
| rollupListeners.collapsibleChanged(this); |
| } |
| } |
| |
| @Override |
| public Sequence<Component> remove(int index, int count) { |
| for (int i = index, n = index + count; i < n; i++) { |
| Component component = get(i); |
| if (component == heading || component == content) { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| // Call the base method to remove the components |
| return super.remove(index, count); |
| } |
| |
| public ListenerList<RollupListener> getRollupListeners() { |
| return rollupListeners; |
| } |
| |
| public ListenerList<RollupStateListener> getRollupStateListeners() { |
| return rollupStateListeners; |
| } |
| } |