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1 /*
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2 CCmI Editor - A Collaborative Cross-Modal Diagram Editing Tool
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3
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4 Copyright (C) 2011 Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)
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5
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6 This program is free software: you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation, either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 */
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19 package uk.ac.qmul.eecs.ccmi.checkboxtree;
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20
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21 import java.awt.Component;
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22
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23 import javax.swing.BorderFactory;
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24 import javax.swing.JCheckBox;
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25 import javax.swing.JTree;
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26 import javax.swing.tree.DefaultTreeCellRenderer;
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27
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28
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29 /**
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30 * A tree cell renderer which renders {@code CheckBoxTreeNode} objects like a {@code JCheckBox}:
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31 * thick box (showing whether the node is selected or not) followed by a label (same label it would
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32 * appear with a default {@code DefaultTreeCellRenderer}.
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33 *
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34 */
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35 @SuppressWarnings("serial")
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36 public class CheckBoxTreeCellRenderer extends DefaultTreeCellRenderer {
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37
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38 public CheckBoxTreeCellRenderer(){
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39 checkBox = new JCheckBox();
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40 checkBox.setBorder(BorderFactory.createLineBorder(this.getBorderSelectionColor()));
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41 }
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42 /**
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43 * Returns the {@code Component} that the renderer uses to draw the value
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44 *
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45 * @throws ClassCastException if {@code value} is not an instance of {@code CheckoxTreeNode}
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46 * @see javax.swing.tree.TreeCellRenderer#getTreeCellRendererComponent(JTree, Object, boolean, boolean, boolean, int, boolean)
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47 * @return the {@code Component} that the renderer uses to draw the value
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48 */
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49 @Override
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50 public Component getTreeCellRendererComponent(JTree tree,
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51 Object value,
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52 boolean selected,
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53 boolean expanded,
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54 boolean leaf,
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55 int row,
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56 boolean hasFocus){
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57
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58 CheckBoxTreeNode treeNode = (CheckBoxTreeNode)value;
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59 if(!treeNode.isSelectable())
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60 return super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
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61
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62 checkBox.setSelected(treeNode.isSelected());
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63 checkBox.setText(value.toString());
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64 if(selected){
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65 checkBox.setBackground(getBackgroundSelectionColor());
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66 checkBox.setBorderPainted(true);
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67 }else{
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68 checkBox.setBackground(getBackgroundNonSelectionColor());
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69 checkBox.setBorderPainted(false);
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70 }
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71 return checkBox;
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72 }
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73
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74 private JCheckBox checkBox;
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75 }
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