ui/BreadCrumbsBar.java

   1
   2 package be.nikiroo.utils.ui;
   3
   4 import java.awt.BorderLayout;
   5 import java.awt.Dimension;
   6 import java.awt.event.ActionEvent;
   7 import java.awt.event.ActionListener;
   8 import java.awt.event.ComponentAdapter;
   9 import java.awt.event.ComponentEvent;
  10 import java.util.ArrayList;
  11 import java.util.List;
  12
  13 import javax.swing.AbstractAction;
  14 import javax.swing.BoxLayout;
  15 import javax.swing.JPanel;
  16 import javax.swing.JPopupMenu;
  17 import javax.swing.JToggleButton;
  18 import javax.swing.SwingWorker;
  19 import javax.swing.event.PopupMenuEvent;
  20 import javax.swing.event.PopupMenuListener;
  21
  22 public class BreadCrumbsBar<T> extends ListenerPanel {
  23         private class BreadCrumb extends JPanel {
  24                 private JToggleButton button;
  25                 private JToggleButton down;
  26
  27                 public BreadCrumb(final DataNode<T> node) {
  28                         this.setLayout(new BorderLayout());
  29
  30                         if (!node.isRoot()) {
  31                                 button = new JToggleButton(node.toString());
  32                                 button.addActionListener(new ActionListener() {
  33                                         @Override
  34                                         public void actionPerformed(ActionEvent e) {
  35                                                 button.setSelected(false);
  36                                                 if (!node.isRoot()) {
  37                                                         // TODO: allow clicking on root? option?
  38                                                         setSelectedNode(node);
  39                                                 }
  40                                         }
  41                                 });
  42
  43                                 this.add(button, BorderLayout.CENTER);
  44                         }
  45
  46                         if ((node.isRoot() && node.getChildren().isEmpty())
  47                                         || !node.getChildren().isEmpty()) {
  48                                 // TODO allow an image or ">", viewer
  49                                 down = new JToggleButton(">");
  50                                 final JPopupMenu popup = new JPopupMenu();
  51
  52                                 for (final DataNode<T> child : node.getChildren()) {
  53                                         popup.add(new AbstractAction(child.toString()) {
  54                                                 private static final long serialVersionUID = 1L;
  55
  56                                                 @Override
  57                                                 public void actionPerformed(ActionEvent e) {
  58                                                         setSelectedNode(child);
  59                                                 }
  60                                         });
  61                                 }
  62
  63                                 down.addActionListener(new ActionListener() {
  64                                         @Override
  65                                         public void actionPerformed(ActionEvent ev) {
  66                                                 if (down.isSelected()) {
  67                                                         popup.show(down, 0, down.getBounds().height);
  68                                                 } else {
  69                                                         popup.setVisible(false);
  70                                                 }
  71                                         }
  72                                 });
  73
  74                                 popup.addPopupMenuListener(new PopupMenuListener() {
  75                                         @Override
  76                                         public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
  77                                         }
  78
  79                                         @Override
  80                                         public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
  81                                                 down.setSelected(false);
  82                                         }
  83
  84                                         @Override
  85                                         public void popupMenuCanceled(PopupMenuEvent e) {
  86                                         }
  87                                 });
  88
  89                                 this.add(down, BorderLayout.EAST);
  90                         }
  91                 }
  92         }
  93
  94         static public final String CHANGE_ACTION = "change";
  95
  96         private boolean vertical;
  97         private DataNode<T> node;
  98         private List<BreadCrumb> crumbs = new ArrayList<BreadCrumb>();
  99
 100         public BreadCrumbsBar(final DataTree<T> tree) {
 101                 vertical = true; // to force an update
 102                 setVertical(false);
 103
 104                 addComponentListener(new ComponentAdapter() {
 105                         @Override
 106                         public void componentResized(ComponentEvent e) {
 107                                 super.componentResized(e);
 108                                 synchronized (crumbs) {
 109                                         for (BreadCrumb crumb : crumbs) {
 110                                                 setCrumbSize(crumb);
 111                                         }
 112                                 }
 113                         }
 114                 });
 115
 116                 setSelectedNode(new DataNode<T>(null, null));
 117
 118                 new SwingWorker<DataNode<T>, Void>() {
 119                         @Override
 120                         protected DataNode<T> doInBackground() throws Exception {
 121                                 tree.loadData();
 122                                 return tree.getRoot();
 123                         }
 124
 125                         @Override
 126                         protected void done() {
 127                                 try {
 128                                         DataNode<T> node = get();
 129
 130                                         setSelectedNode(null);
 131                                         BreadCrumbsBar.this.node = node;
 132                                         addCrumb(node);
 133
 134                                         // TODO: option?
 135                                         if (node.size() > 0) {
 136                                                 setSelectedNode(node.getChildren().get(0));
 137                                         } else {
 138                                                 revalidate();
 139                                                 repaint();
 140                                         }
 141                                 } catch (Exception e) {
 142                                         e.printStackTrace();
 143                                 }
 144                         }
 145                 }.execute();
 146         }
 147
 148         public void setVertical(boolean vertical) {
 149                 if (vertical != this.vertical) {
 150                         synchronized (crumbs) {
 151                                 this.vertical = vertical;
 152
 153                                 for (BreadCrumb crumb : crumbs) {
 154                                         this.remove(crumb);
 155                                 }
 156
 157                                 if (vertical) {
 158                                         this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
 159                                 } else {
 160                                         this.setLayout(new WrapLayout(WrapLayout.LEADING));
 161                                 }
 162
 163                                 for (BreadCrumb crumb : crumbs) {
 164                                         this.add(crumb);
 165                                         setCrumbSize(crumb);
 166                                 }
 167                         }
 168
 169                         this.revalidate();
 170                         this.repaint();
 171                 }
 172         }
 173
 174         public DataNode<T> getSelectedNode() {
 175                 return node;
 176         }
 177
 178         public void setSelectedNode(DataNode<T> node) {
 179                 if (this.node == node) {
 180                         return;
 181                 }
 182
 183                 synchronized (crumbs) {
 184                         // clear until common ancestor (can clear all!)
 185                         while (this.node != null && !this.node.isParentOf(node)) {
 186                                 this.node = this.node.getParent();
 187                                 this.remove(crumbs.remove(crumbs.size() - 1));
 188                         }
 189
 190                         // switch root if needed and possible
 191                         if (this.node == null && node != null) {
 192                                 this.node = node.getRoot();
 193                                 addCrumb(this.node);
 194                         }
 195
 196                         // re-create until node
 197                         while (node != null && this.node != node) {
 198                                 DataNode<T> ancestorOrNode = node;
 199                                 for (DataNode<T> child : this.node.getChildren()) {
 200                                         if (child.isParentOf(node))
 201                                                 ancestorOrNode = child;
 202                                 }
 203
 204                                 this.node = ancestorOrNode;
 205                                 addCrumb(this.node);
 206                         }
 207                 }
 208
 209                 this.revalidate();
 210                 this.repaint();
 211
 212                 fireActionPerformed(CHANGE_ACTION);
 213         }
 214
 215         private void addCrumb(DataNode<T> node) {
 216                 BreadCrumb crumb = new BreadCrumb(node);
 217                 this.crumbs.add(crumb);
 218                 setCrumbSize(crumb);
 219                 this.add(crumb);
 220         }
 221
 222         private void setCrumbSize(BreadCrumb crumb) {
 223                 if (vertical) {
 224                         crumb.setMaximumSize(new Dimension(this.getWidth(),
 225                                         crumb.getMinimumSize().height));
 226                 } else {
 227                         crumb.setMaximumSize(null);
 228                 }
 229         }
 230 }