Catch exceptions when statechart can't be rendered

opengeode/Statechart.py

@@ -442,10 +442,14 @@ def render_statechart(scene, graphtree=None, keep_pos=False, dump_gfx=''):
     # Harmonize the size of states to avoid having huge composite state(s)
     # next to single, small states. Rule: there can't be a state with a size
     # that is less than a third of the biggest state.
-    min_width = float(max(node.attr.get('width', 0.0) or 0.0
-                    for node in graphtree['graph'].iternodes()))
-    min_height = float(max(node.attr.get('height', 0.0) or 0.0
-                    for node in graphtree['graph'].iternodes()))
+    try:
+        min_width = float(max(node.attr.get('width', 0.0) or 0.0
+                        for node in graphtree['graph'].iternodes()))
+        min_height = float(max(node.attr.get('height', 0.0) or 0.0
+                        for node in graphtree['graph'].iternodes()))
+    except ValueError as err:
+        LOG.debug(str(err))
+        min_width, min_height = 0, 0
     if min_width and min_height:
         for node in graphtree['graph'].iternodes():
             if node.attr['shape'] != 'record':

opengeode/opengeode.py

@@ -2010,15 +2010,15 @@ class OG_MainWindow(QtGui.QMainWindow, object):
                 scene = self.view.parent_scene[0][0]
             else:
                 scene = self.view.scene()
-            graph = scene.sdl_to_statechart()
             try:
+                graph = scene.sdl_to_statechart()
                 Statechart.render_statechart(self.statechart_scene,
                                              graph)
                 self.statechart_view.refresh()
                 self.statechart_view.fitInView(
                         self.statechart_scene.itemsBoundingRect(),
                         Qt.KeepAspectRatioByExpanding)
-            except (IOError, TypeError) as err:
+            except (AttributeError, IOError, TypeError) as err:
                 LOG.debug(str(err))
 
     @QtCore.Slot(ogAST.AST)
@@ -2298,12 +2298,12 @@ def export(ast, options):
             # Also save the statechart view of the current scene
             LOG.info('Saving statechart sc_{}.png'.format(process.processName))
             sc_scene = SDL_Scene(context='statechart')
-            graph = diagram.sdl_to_statechart()
             try:
+                graph = diagram.sdl_to_statechart()
                 Statechart.render_statechart(sc_scene, graph,
                                              dump_gfx=process.processName)
                 sc_scene.refresh()
-            except (IOError, TypeError) as err:
+            except (AttributeError, IOError, TypeError) as err:
                 LOG.debug(str(err))