Changeset 528

Timestamp:

11/08/09 12:31:46 (2 years ago)

Author:

octorian

Message:

Saving of folder expansion state for the home screen

File:

• trunk/LogicMail/src/org/logicprobe/LogicMail/ui/MailHomeScreen.java (modified) (4 diffs)

trunk/LogicMail/src/org/logicprobe/LogicMail/ui/MailHomeScreen.java

@@ -62 +62 @@
 import org.logicprobe.LogicMail.model.MailboxNodeListener;
 import org.logicprobe.LogicMail.model.Node;
+import org.logicprobe.LogicMail.util.DataStoreFactory;
+import org.logicprobe.LogicMail.util.Serializable;
+import org.logicprobe.LogicMail.util.SerializableHashtable;
 
 /**
@@ -261 +264 @@
                 generateMailTree();
                 populateMailTree(mailTreeRootNode);
-        }
-        
+                loadScreenMetadata();
+        }
+
         private void generateMailTree() {
                 mailTreeRootNode = new TreeNode(null, 0);
@@ -426 +430 @@
          */
         public boolean onClose() {
+                saveScreenMetadata();
                 // Roundabout kludge for now
                 ((StandardScreen)screen).tryShutdownApplication();
@@ -673 +678 @@
                 return accountNode;
         }
+        
+        private void loadScreenMetadata() {
+                DataStoreFactory.getMetadataStore().load();
+        SerializableHashtable folderMetadata;
+        folderMetadata =
+                (SerializableHashtable)DataStoreFactory.getMetadataStore().getNamedObject(
+                                this.getClass().toString());
+
+        if(folderMetadata != null) {
+            int curNode = treeField.nextNode(0, 0, true);
+            Object cookie;
+            Object value;
+            Vector actions = new Vector();
+            
+            // Walk the folder tree and build a depth-first list of
+            // nodes we need to set the expansion state for
+            while(curNode > 0) {
+                if(treeField.getFirstChild(curNode) != -1) {
+                    cookie = treeField.getCookie(curNode);
+                    if(cookie instanceof TreeNode) {
+                        String key = getTreeNodeKey((TreeNode)cookie);
+                        value = folderMetadata.get(key);
+                        if(value instanceof Boolean) {
+                            actions.addElement(new Object[] { new Integer(curNode), value } );
+                        }
+                    }
+                }
+                curNode = treeField.nextNode(curNode, 0, true);
+            }
+            
+            // Iterate backwards across the results from above, and set
+            // the appropriate node expansion states.  This approach is
+            // necessary so complex trees will be configured properly.
+            Object[] action;
+            for(int i = actions.size() - 1; i >= 0; i--) {
+                action = (Object[])actions.elementAt(i);
+                treeField.setExpanded(((Integer)action[0]).intValue(), ((Boolean)action[1]).booleanValue());
+            }
+        }
+        treeField.setCurrentNode(treeField.getFirstChild(0));
+                
+        }
+        
+        private void saveScreenMetadata() {
+        SerializableHashtable folderMetadata = new SerializableHashtable();
+        int curNode = treeField.nextNode(0, 0, true);
+        Object cookie;
+        while(curNode > 0) {
+            if(treeField.getFirstChild(curNode) != -1) {
+                cookie = treeField.getCookie(curNode);
+                if(cookie instanceof TreeNode) {
+                        String key = getTreeNodeKey((TreeNode)cookie);
+                    folderMetadata.put(
+                            key,
+                            new Boolean(treeField.getExpanded(curNode)));
+                }
+            }
+            curNode = treeField.nextNode(curNode, 0, true);
+        }
+        
+        DataStoreFactory.getMetadataStore().putNamedObject(
+                        this.getClass().toString(), folderMetadata);
+        DataStoreFactory.getMetadataStore().save();
+        }
+
+        private static String getTreeNodeKey(TreeNode treeNode) {
+                Node node = treeNode.node;
+                String key;
+                if(node instanceof Serializable) {
+                        key = Long.toString(((Serializable)node).getUniqueId());
+                }
+                else {
+                        key = node.toString();
+                }
+                return key;
+        }
 }