From 6b2f65861c9a87e8ac75eb63cfac7639f1762680 Mon Sep 17 00:00:00 2001
From: Tomeu Vizoso <tomeu@sugarlabs.org>
Date: Mon, 16 Feb 2009 19:54:43 +0000
Subject: Update connections after every move

---
diff --git a/thoughtview.py b/thoughtview.py
index eeae9e8..809d1ac 100644
--- a/thoughtview.py
+++ b/thoughtview.py
@@ -39,6 +39,7 @@ class ThoughtView(Box):
         self._handles.append(self.new_thought_handle)
         
         self.id = thought_id
+        self.line_to_parent = None
         self._name = name
         self._color = color
 
diff --git a/view.py b/view.py
index 029f3da..afe5568 100644
--- a/view.py
+++ b/view.py
@@ -113,18 +113,27 @@ class MindMapView(GtkView):
 
         raise ValueError('Rect %r and line %r dont intersect!' % (rect, line,))
 
-    def _connect_items(self, parent_view, thought_view):
-        line = Line()
-        self.canvas.add(line)
-
+    def _update_connection(self, parent_view, thought_view):
         handle_tool = tool.ConnectHandleTool()
 
+        if thought_view.line_to_parent is None:
+            line = Line()
+            self.canvas.add(line)
+            thought_view.line_to_parent = line
+        else:
+            line = thought_view.line_to_parent
+            line_handle = line.handles()[0]
+            handle_tool.disconnect(self, line, line_handle)
+            handle_tool.disconnect(self, line, line.opposite(line_handle))
+
         start, end = self._calculate_ports(thought_view, parent_view)
 
         line_handle = line.handles()[0]
         handle_tool.connect(self, line, line_handle, start)
         handle_tool.connect(self, line, line.opposite(line_handle), end)
 
+        self.canvas.request_update(line)
+
     def __row_changed_cb(self, model, path, iter):
         row = model[iter]
         #logging.debug('__row_changed_cb %r' % ((row[0], row[1], row[2], row[3], row[4],),))
@@ -133,17 +142,20 @@ class MindMapView(GtkView):
         if thought_view is None:
             thought_view = ThoughtView(row[0], row[1], row[2], row[3], row[4])
             self.canvas.add(thought_view)
-
-            if row.parent is not None:
-                parent_view = self._get_thought_by_id(row.parent[0])
-                gobject.idle_add(lambda: self._connect_items(parent_view,
-                                                             thought_view))
         else:
             thought_view.name = row[1]
             thought_view.set_position(row[2], row[3])
             thought_view.color = row[4]
 
-            self.canvas.request_update(thought_view)
+        self.canvas.request_update(thought_view)
+
+        if row.parent is not None:
+            parent_view = self._get_thought_by_id(row.parent[0])
+            self._update_connection(parent_view, thought_view)
+
+        for child in row.iterchildren():
+            child_view = self._get_thought_by_id(child[0])
+            self._update_connection(thought_view, child_view)
 
     def __row_deleted_cb(self, model, path):
         logging.debug('__row_deleted_cb %r' % path)
--
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