use lazy updates for memory analyzer plugin

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@1238 bbaffbd6-741e-11dd-a85d-61de82d9cad9

share/ui/memory_analyzer.ui

@@ -22,7 +22,7 @@
       <object class="GtkVBox" id="dialog-vbox1">
         <property name="visible">True</property>
         <property name="orientation">vertical</property>
-        <property name="spacing">2</property>
+        <property name="spacing">4</property>
         <child>
           <object class="GtkScrolledWindow" id="scrolledwindow1">
             <property name="visible">True</property>
@@ -97,6 +97,20 @@
             <property name="position">1</property>
           </packing>
         </child>
+        <child>
+          <object class="GtkLabel" id="MemoryAnalyzerLoadingLabel">
+            <property name="visible">True</property>
+            <property name="label" translatable="yes">Updating memory usage data ...</property>
+            <attributes>
+              <attribute name="style" value="italic"/>
+            </attributes>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">2</property>
+          </packing>
+        </child>
         <child internal-child="action_area">
           <object class="GtkHButtonBox" id="dialog-action_area1">
             <property name="visible">True</property>

src/pycam/Plugins/MemoryAnalyzer.py

@@ -21,6 +21,7 @@ along with PyCAM.  If not, see <http://www.gnu.org/licenses/>.
 """
 
 
+import gobject
 import guppy
 
 import pycam.Plugins
@@ -92,9 +93,16 @@ class MemoryAnalyzer(pycam.Plugins.PluginBase):
         return True
 
     def refresh_memory_analyzer(self, widget=None):
-        memory_state = guppy.hpy().heap()
         self.model.clear()
+        self.gui.get_object("MemoryAnalyzerLoadingLabel").show()
+        self.gui.get_object("MemoryAnalyzerRefreshButton").set_sensitive(False)
+        gobject.idle_add(self._refresh_data_in_background)
+
+    def _refresh_data_in_background(self):
+        memory_state = 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)
+        self.gui.get_object("MemoryAnalyzerRefreshButton").set_sensitive(True)
+        self.gui.get_object("MemoryAnalyzerLoadingLabel").hide()