Introduce activity monitor FlatCAMProcess.py.

FlatCAMProcess.py

@@ -1,4 +1,7 @@
 from FlatCAMGUI import FlatCAMActivityView
+from PyQt4 import QtCore
+import weakref
+
 
 class FCProcess(object):
 
@@ -8,7 +11,11 @@ class FCProcess(object):
         }
         self.descr = descr
 
+    def __del__(self):
+        self.done()
+
     def done(self):
+        print "FCProcess.done()"
         for fcn in self.callbacks["done"]:
             fcn(self)
 
@@ -34,40 +41,74 @@ class FCProcessContainer(object):
 
     def add(self, proc):
 
-        self.procs.append(proc)
+        self.procs.append(weakref.ref(proc))
 
     def new(self, descr):
         proc = FCProcess(descr)
+
         proc.connect(self.on_done, event="done")
 
-    def on_done(self, proc):
+        # if proc not in self.procs:
+        #     self.procs.append(proc)
+        self.add(proc)
+
+        self.on_change(proc)
+
+        return proc
+
+    def on_change(self, proc):
         pass
 
+    def on_done(self, proc):
+        self.remove(proc)
+
     def remove(self, proc):
 
-        if proc in self.procs:
-            self.procs.remove(proc)
+        to_be_removed = []
+
+        for pref in self.procs:
+            if pref() == proc or pref() is None:
+                to_be_removed.append(pref)
+
+        for pref in to_be_removed:
+            self.procs.remove(pref)
 
 
-class FCVisibleProcessContainer(FCProcessContainer):
+class FCVisibleProcessContainer(QtCore.QObject, FCProcessContainer):
+    something_changed = QtCore.pyqtSignal()
 
     def __init__(self, view):
         assert isinstance(view, FlatCAMActivityView)
 
-        super(FCVisibleProcessContainer, self).__init__()
+        #super(FCVisibleProcessContainer, self).__init__()
+        FCProcessContainer.__init__(self)
+        QtCore.QObject.__init__(self)
 
         self.view = view
 
+        self.something_changed.connect(self.update_view)
+
     def on_done(self, proc):
+        print "FCVisibleProcessContainer.on_done()"
         super(FCVisibleProcessContainer, self).on_done(proc)
 
-        self.update_view()
+        #self.update_view()
+        self.something_changed.emit()
+
+    def on_change(self, proc):
+        print "FCVisibleProcessContainer.on_change()"
+        super(FCVisibleProcessContainer, self).on_change(proc)
+
+        #self.update_view()
+        self.something_changed.emit()
 
     def update_view(self):
-
+        print "FCVisibleProcessContainer.update_view()"
         if len(self.procs) == 0:
             self.view.set_idle()
+
         elif len(self.procs) == 1:
-            self.view.set_busy(self.procs[0].status_msg())
+            self.view.set_busy(self.procs[0]().status_msg())
+
         else:
             self.view.set_busy("%d processes running." % len(self.procs))