Clarify distinction between UX views and parts

[lgpl/argeo-commons.git] / swt / org.argeo.cms.swt / src / org / argeo / cms / swt / widgets / SwtTreeView.java

diff --git a/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/SwtTreeView.java b/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/SwtTreeView.java
new file mode 100644 (file)
index 0000000..79543e9
--- /dev/null
+++ b/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/SwtTreeView.java
@@ -0,0 +1,90 @@
+package org.argeo.cms.swt.widgets;
+
+import java.util.List;
+
+import org.argeo.api.cms.ux.CmsIcon;
+import org.argeo.cms.swt.CmsSwtTheme;
+import org.argeo.cms.swt.CmsSwtUtils;
+import org.argeo.cms.ux.widgets.HierarchicalPart;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+
+/** View of a {@link HierarchicalPart} based on a {@link Tree}. */
+public class SwtTreeView<T> extends AbstractSwtView<T, T> {
+       private static final long serialVersionUID = -6247710601465713047L;
+
+       private final Tree tree;
+
+       private HierarchicalPart<T> hierarchicalPart;
+       private CmsSwtTheme theme;
+
+       public SwtTreeView(Composite parent, int style, HierarchicalPart<T> hierarchicalPart) {
+               super(parent, style, hierarchicalPart);
+               theme = CmsSwtUtils.getCmsTheme(parent);
+
+               tree = new Tree(this, SWT.BORDER);
+               tree.setLayoutData(CmsSwtUtils.fillAll());
+               this.hierarchicalPart = hierarchicalPart;
+
+               tree.addSelectionListener(selectionListener);
+       }
+
+       @SuppressWarnings("unchecked")
+       @Override
+       public void refresh() {
+               // TODO optimise
+               for (TreeItem rootItem : tree.getItems()) {
+                       rootItem.dispose();
+               }
+
+               List<T> rootItems = hierarchicalPart.getChildren(hierarchicalPart.getInput());
+               for (T child : rootItems) {
+                       addTreeItem(null, child);
+               }
+
+               tree.addListener(SWT.Expand, event -> {
+                       final TreeItem root = (TreeItem) event.item;
+                       TreeItem[] items = root.getItems();
+                       for (TreeItem item : items) {
+                               if (item.getData() != null) {
+                                       return;
+                               }
+                               item.dispose();
+                       }
+
+                       List<T> children = hierarchicalPart.getChildren((T) root.getData());
+                       for (T child : children) {
+                               addTreeItem(root, child);
+                       }
+               });
+
+               CmsSwtUtils.fill(tree);
+
+       }
+
+       protected TreeItem addTreeItem(TreeItem parent, T data) {
+               TreeItem item = parent == null ? new TreeItem(tree, SWT.NONE) : new TreeItem(parent, SWT.NONE);
+               item.setData(data);
+               String txt = hierarchicalPart.getText(data);
+               if (txt != null)
+                       item.setText(hierarchicalPart.getText(data));
+               CmsIcon icon = hierarchicalPart.getIcon(data);
+               if (icon != null) {
+                       Image image = theme.getSmallIcon(icon);
+                       item.setImage(image);
+               }
+               // TODO optimize
+               List<T> grandChildren = hierarchicalPart.getChildren(data);
+               if (grandChildren.size() != 0)
+                       new TreeItem(item, SWT.NONE);
+               return item;
+       }
+
+       protected Tree getTree() {
+               return tree;
+       }
+
+}