don't abort the initialization of the memory analyzer plugin, if guppy is missing

* show a descriptive message in the plugin's dialog instead
* change the "broken plugin" message to "broken or dependency missing"


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@1246 bbaffbd6-741e-11dd-a85d-61de82d9cad9

share/ui/memory_analyzer.ui

@@ -23,6 +23,11 @@
         <property name="visible">True</property>
         <property name="orientation">vertical</property>
         <property name="spacing">4</property>
+        <child>
+          <object class="GtkVBox" id="MemoryAnalyzerDataBox">
+            <property name="visible">True</property>
+            <property name="orientation">vertical</property>
+            <property name="spacing">3</property>
             <child>
               <object class="GtkScrolledWindow" id="scrolledwindow1">
                 <property name="visible">True</property>
@@ -94,7 +99,7 @@
                 </child>
               </object>
               <packing>
-            <property name="position">1</property>
+                <property name="position">0</property>
               </packing>
             </child>
             <child>
@@ -108,6 +113,23 @@
               <packing>
                 <property name="expand">False</property>
                 <property name="fill">False</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="position">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkLabel" id="MemoryAnalyzerBrokenLabel">
+            <property name="visible">True</property>
+            <property name="label" translatable="yes">The memory analyzer requires the Python module &lt;i&gt;guppy&lt;/i&gt;, but it seems to be missing.</property>
+            <property name="use_markup">True</property>
+            <property name="justify">center</property>
+            <property name="wrap">True</property>
+          </object>
+          <packing>
             <property name="position">2</property>
           </packing>
         </child>

src/pycam/Plugins/MemoryAnalyzer.py

@@ -24,9 +24,13 @@ along with PyCAM.  If not, see <http://www.gnu.org/licenses/>.
 import StringIO
 import csv
 import gobject
-import guppy
+# guppy will be imported later
+#import guppy
 
 import pycam.Plugins
+import pycam.Utils.log
+
+_log = pycam.Utils.log.get_logger()
 
 
 class MemoryAnalyzer(pycam.Plugins.PluginBase):
@@ -64,6 +68,15 @@ class MemoryAnalyzer(pycam.Plugins.PluginBase):
             self.model = self.gui.get_object("MemoryAnalyzerModel")
             # window state
             self._window_position = None
+            # check if "heapy" is available - this disables all widgets
+            try:
+                import guppy
+            except ImportError:
+                self._guppy = None
+                self.gui.get_object("MemoryAnalyzerDataBox").hide()
+            else:
+                self._guppy = guppy
+                self.gui.get_object("MemoryAnalyzerBrokenLabel").hide()
             self.register_gtk_handlers(self._gtk_handlers)
         return True
 
@@ -105,7 +118,9 @@ class MemoryAnalyzer(pycam.Plugins.PluginBase):
         gobject.idle_add(self._refresh_data_in_background)
 
     def _refresh_data_in_background(self):
-        memory_state = guppy.hpy().heap()
+        if not self._guppy:
+            return
+        memory_state = self._guppy.hpy().heap()
         for row in memory_state.stat.get_rows():
             item = (row.name, row.count, row.size / 1024, row.size / row.count)
             self.model.append(item)

src/pycam/Plugins/__init__.py

@@ -223,8 +223,9 @@ class PluginManager(object):
                     mod = imp.load_module(full_mod_name, mod_file,
                             mod_filename, mod_desc)
                 except ImportError:
-                    _log.info("Skipping broken plugin %s" % os.path.join(
-                            directory, filename))
+                    _log.info(("Skipping plugin %s (broken or " + \
+                            "dependencies missing)") % \
+                            os.path.join(directory, filename))
                     continue
                 for attr in dir(mod):
                     item = getattr(mod, attr)