| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hivegui.table; |
| 16 | |
| 17 | import java.util.Arrays; |
| 18 | |
| 19 | import javax.swing.event.ListSelectionEvent; |
| 20 | import javax.swing.event.ListSelectionListener; |
| 21 | |
| 22 | import net.sourceforge.hiveevents.Channel; |
| 23 | import net.sourceforge.hiveevents.ChannelImpl; |
| 24 | import net.sourceforge.hiveevents.Consumer; |
| 25 | |
| 26 | /** |
| 27 | * @author Jean-Francois Poilpret |
| 28 | */ |
| 29 | public class TableSelectionHandler<T> |
| 30 | { |
| 31 | public TableSelectionHandler(BeanTable<T> table, TableContribution contrib) |
| 32 | { |
| 33 | _table = table; |
| 34 | _beanClass = _table.getDataListModel().getRowClass(); |
| 35 | _selectionMode = contrib.getSelectionMode(); |
| 36 | _table.setSelectionMode(_selectionMode.value()); |
| 37 | _selection = contrib.getSelectionEvent(); |
| 38 | if (_selection != null) |
| 39 | { |
| 40 | initSelectionChannel(); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | @SuppressWarnings("unchecked") |
| 45 | public void addSelectionConsumer(int priority, Consumer consumer) |
| 46 | { |
| 47 | createSelectionChannel(); |
| 48 | _selection.registerPushConsumer(priority, consumer); |
| 49 | } |
| 50 | |
| 51 | @SuppressWarnings("unchecked") |
| 52 | private void createSelectionChannel() |
| 53 | { |
| 54 | if (_selection == null) |
| 55 | { |
| 56 | _selection = new ChannelImpl( "BeanTable.SelectionChannel", |
| 57 | Integer.MAX_VALUE, |
| 58 | _beanClass, |
| 59 | false); |
| 60 | initSelectionChannel(); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | private void initSelectionChannel() |
| 65 | { |
| 66 | if (_selection != null) |
| 67 | { |
| 68 | ListSelectionListener listener = null; |
| 69 | switch (_selectionMode) |
| 70 | { |
| 71 | case Single: |
| 72 | listener = new SingleSelectionListener(); |
| 73 | break; |
| 74 | |
| 75 | case Interval: |
| 76 | case Multiple: |
| 77 | listener = new MultipleSelectionListener(); |
| 78 | break; |
| 79 | |
| 80 | default: |
| 81 | // No other possible value |
| 82 | break; |
| 83 | } |
| 84 | _table.getSelectionModel().addListSelectionListener(listener); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | private class SingleSelectionListener implements ListSelectionListener |
| 89 | { |
| 90 | @SuppressWarnings("unchecked") |
| 91 | public void valueChanged(ListSelectionEvent e) |
| 92 | { |
| 93 | int selected = _table.getSelectedRow(); |
| 94 | if (selected != _lastSelection) |
| 95 | { |
| 96 | Object row = null; |
| 97 | if (selected > -1) |
| 98 | { |
| 99 | row = _table.getDataListModel().getRow(selected); |
| 100 | } |
| 101 | _lastSelection = selected; |
| 102 | _selection.push(row); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | private int _lastSelection = -1; |
| 107 | } |
| 108 | |
| 109 | private class MultipleSelectionListener implements ListSelectionListener |
| 110 | { |
| 111 | @SuppressWarnings("unchecked") |
| 112 | public void valueChanged(ListSelectionEvent e) |
| 113 | { |
| 114 | int[] selected = _table.getSelectedRows(); |
| 115 | if (!Arrays.equals(selected, _lastSelection)) |
| 116 | { |
| 117 | Object[] rows = EMPTY; |
| 118 | if (selected.length > 0) |
| 119 | { |
| 120 | DataListModel<T> model = _table.getDataListModel(); |
| 121 | rows = new Object[selected.length]; |
| 122 | for (int i = 0; i < selected.length; i++) |
| 123 | { |
| 124 | rows[i] = model.getRow(selected[i]); |
| 125 | } |
| 126 | } |
| 127 | _lastSelection = selected; |
| 128 | _selection.push(rows); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | private int[] _lastSelection = new int[0]; |
| 133 | } |
| 134 | |
| 135 | private Channel _selection; |
| 136 | private final Class<T> _beanClass; |
| 137 | private final SelectionMode _selectionMode; |
| 138 | private final BeanTable<T> _table; |
| 139 | |
| 140 | static final private Object[] EMPTY = new Object[0]; |
| 141 | } |