eclipse/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/SwtHierarchicalPart.java

   1 package org.argeo.cms.swt.widgets;
   2
   3 import java.util.List;
   4
   5 import org.argeo.api.cms.ux.CmsIcon;
   6 import org.argeo.cms.swt.CmsSwtUtils;
   7 import org.argeo.cms.ux.widgets.HierarchicalPart;
   8 import org.eclipse.swt.SWT;
   9 import org.eclipse.swt.widgets.Composite;
  10 import org.eclipse.swt.widgets.Tree;
  11 import org.eclipse.swt.widgets.TreeItem;
  12
  13 /** {@link HierarchicalPart} implementation based on a {@link Tree}. */
  14 public class SwtHierarchicalPart<T> extends AbstractSwtPart<T, T> {
  15         private static final long serialVersionUID = -6247710601465713047L;
  16
  17         private final Tree tree;
  18
  19         private HierarchicalPart<T> hierarchicalPart;
  20
  21         public SwtHierarchicalPart(Composite parent, int style, HierarchicalPart<T> hierarchicalPart) {
  22                 super(parent, style, hierarchicalPart);
  23                 tree = new Tree(this, SWT.BORDER);
  24                 tree.setLayoutData(CmsSwtUtils.fillAll());
  25                 this.hierarchicalPart = hierarchicalPart;
  26
  27                 tree.addSelectionListener(selectionListener);
  28         }
  29
  30         @Override
  31         public void refresh() {
  32                 // TODO optimise
  33                 // tree.clearAll(true);
  34
  35                 for (TreeItem rootItem : tree.getItems()) {
  36                         rootItem.dispose();
  37                 }
  38
  39                 List<T> rootItems = hierarchicalPart.getChildren(hierarchicalPart.getInput());
  40                 for (T child : rootItems) {
  41                         TreeItem childItem = addTreeItem(null, child);
  42 //                      List<T> grandChildren = hierarchicalPart.getChildren(child);
  43 //                      for (T grandChild : grandChildren) {
  44 //                              addTreeItem(childItem, grandChild);
  45 //                      }
  46                 }
  47 //              tree.addListener(SWT.SetData, event -> {
  48 //                      TreeItem item = (TreeItem) event.item;
  49 //                      TreeItem parentItem = item.getParentItem();
  50 //                      if (parentItem == null) {
  51 //                              refreshRootItem(item);
  52 //                      } else {
  53 //                              refreshItem(parentItem, item);
  54 //                      }
  55 //              });
  56 //              tree.setItemCount(getRootItemCount());
  57
  58                 tree.addListener(SWT.Expand, event -> {
  59                         final TreeItem root = (TreeItem) event.item;
  60                         TreeItem[] items = root.getItems();
  61                         for (TreeItem item : items) {
  62                                 if (item.getData() != null) {
  63 //                                      List<T> grandChildren = hierarchicalPart.getChildren((T) item.getData());
  64 //                                      for (T grandChild : grandChildren) {
  65 //                                              addTreeItem(item, grandChild);
  66 //                                      }
  67                                         return;
  68                                 }
  69                                 item.dispose();
  70                         }
  71
  72                         List<T> children = hierarchicalPart.getChildren((T) root.getData());
  73                         for (T child : children) {
  74                                 TreeItem childItem = addTreeItem(root, child);
  75 //                              List<T> grandChildren = hierarchicalPart.getChildren(child);
  76 //                              for (T grandChild : grandChildren) {
  77 //                                      addTreeItem(childItem, grandChild);
  78 //                              }
  79                         }
  80                 });
  81
  82                 CmsSwtUtils.fill(tree);
  83
  84         }
  85
  86         protected TreeItem addTreeItem(TreeItem parent, T data) {
  87                 TreeItem item = parent == null ? new TreeItem(tree, SWT.NONE) : new TreeItem(parent, SWT.NONE);
  88                 item.setData(data);
  89                 String txt = hierarchicalPart.getText(data);
  90                 if (txt != null)
  91                         item.setText(hierarchicalPart.getText(data));
  92                 CmsIcon icon = hierarchicalPart.getIcon(data);
  93                 // TODO optimize
  94                 List<T> grandChildren = hierarchicalPart.getChildren(data);
  95                 if (grandChildren.size() != 0)
  96                         new TreeItem(item, SWT.NONE);
  97                 return item;
  98 //if(icon!=null)
  99 //      item.setImage(null);
 100         }
 101
 102         protected Tree getTree() {
 103                 return tree;
 104         }
 105
 106 }