1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.util;
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3 |
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4 | import java.util.Arrays;
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5 |
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6 | import javax.swing.JList;
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7 | import javax.swing.JTable;
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8 | import javax.swing.ListModel;
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9 | import javax.swing.ListSelectionModel;
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10 | import javax.swing.table.TableModel;
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11 |
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12 | import org.openstreetmap.josm.data.ReorderableModel;
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13 |
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14 | /**
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15 | * Defines a list/table model that can be reordered.
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16 | * @param <T> item type
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17 | * @since 15226
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18 | */
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19 | public interface ReorderableTableModel<T> extends ReorderableModel<T> {
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20 |
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21 | /**
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22 | * Returns the selection model.
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23 | * @return the selection model (never null)
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24 | * @see JList#getSelectionModel()
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25 | * @see JTable#getSelectionModel()
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26 | */
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27 | ListSelectionModel getSelectionModel();
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28 |
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29 | /**
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30 | * Returns the number of rows in the list/table.
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31 | * @return the number of rows in the list/table
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32 | * @see ListModel#getSize()
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33 | * @see TableModel#getRowCount()
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34 | */
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35 | int getRowCount();
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36 |
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37 | /**
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38 | * Returns an array of all of the selected indices in the selection model, in increasing order.
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39 | * @return an array of all of the selected indices in the selection model, in increasing order
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40 | */
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41 | default int[] getSelectedIndices() {
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42 | return TableHelper.getSelectedIndices(getSelectionModel());
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43 | }
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44 |
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45 | /**
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46 | * Checks that the currently selected range of rows can be moved by a number of positions.
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47 | * @param delta negative or positive delta
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48 | * @return {@code true} if rows can be moved
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49 | */
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50 | default boolean canMove(int delta) {
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51 | return canMove(delta, this::getRowCount, getSelectedIndices());
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52 | }
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53 |
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54 | /**
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55 | * Checks that the currently selected range of rows can be moved up.
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56 | * @return {@code true} if rows can be moved up
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57 | */
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58 | default boolean canMoveUp() {
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59 | return canMoveUp(getSelectedIndices());
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60 | }
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61 |
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62 | /**
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63 | * Checks that a range of rows can be moved up.
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64 | * @param rows indexes of rows to move up
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65 | * @return {@code true} if rows can be moved up
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66 | */
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67 | default boolean canMoveUp(int... rows) {
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68 | return canMoveUp(this::getRowCount, rows);
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69 | }
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70 |
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71 | /**
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72 | * Checks that the currently selected range of rows can be moved down.
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73 | * @return {@code true} if rows can be moved down
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74 | */
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75 | default boolean canMoveDown() {
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76 | return canMoveDown(getSelectedIndices());
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77 | }
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78 |
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79 | /**
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80 | * Checks that a range of rows can be moved down.
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81 | * @param rows indexes of rows to move down
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82 | * @return {@code true} if rows can be moved down
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83 | */
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84 | default boolean canMoveDown(int... rows) {
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85 | return canMoveDown(this::getRowCount, rows);
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86 | }
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87 |
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88 | /**
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89 | * Move up selected rows, if possible.
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90 | * @return {@code true} if the move was performed
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91 | * @see #canMoveUp
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92 | */
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93 | default boolean moveUp() {
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94 | return moveUp(getSelectedIndices());
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95 | }
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96 |
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97 | /**
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98 | * Move up selected rows, if possible.
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99 | * @param selectedRows rows to move up
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100 | * @return {@code true} if the move was performed
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101 | * @see #canMoveUp
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102 | */
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103 | default boolean moveUp(int... selectedRows) {
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104 | return move(-1, selectedRows);
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105 | }
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106 |
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107 | /**
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108 | * Move down selected rows, if possible.
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109 | * @return {@code true} if the move was performed
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110 | * @see #canMoveDown
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111 | */
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112 | default boolean moveDown() {
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113 | return moveDown(getSelectedIndices());
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114 | }
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115 |
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116 | /**
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117 | * Move down selected rows by 1 position, if possible.
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118 | * @param selectedRows rows to move down
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119 | * @return {@code true} if the move was performed
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120 | * @see #canMoveDown
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121 | */
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122 | default boolean moveDown(int... selectedRows) {
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123 | return move(1, selectedRows);
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124 | }
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125 |
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126 | /**
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127 | * Move selected rows by any number of positions, if possible.
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128 | * @param delta negative or positive delta
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129 | * @param selectedRows rows to move
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130 | * @return {@code true} if the move was performed
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131 | * @see #canMove
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132 | */
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133 | default boolean move(int delta, int... selectedRows) {
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134 | if (!canMove(delta, this::getRowCount, selectedRows))
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135 | return false;
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136 | if (!doMove(delta, selectedRows))
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137 | return false;
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138 | final ListSelectionModel selectionModel = getSelectionModel();
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139 | TableHelper.setSelectedIndices(selectionModel, Arrays.stream(selectedRows).map(i -> i + delta));
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140 | return true;
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141 | }
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142 | }
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