Simulation thread control developed.

src/Mod/Ship/CMakeLists.txt

@@ -43,6 +43,8 @@ SET(ShipIcons_SRCS
 	Icons/SimCreateIco.xpm
 	Icons/SimRunIco.png
 	Icons/SimRunIco.xpm
+	Icons/SimStopIco.png
+	Icons/SimStopIco.xpm
 	Icons/Tank.png
 	Icons/Tank.xcf
 	Icons/Tank.xpm

src/Mod/Ship/InitGui.py

@@ -42,7 +42,7 @@ class ShipWorkbench ( Workbench ):
             msg = Translator.translate("pyOpenCL not installed, ship simulations disabled\n")
             App.Console.PrintWarning(msg)
         else:
-            list = ["Ship_CreateSim", "Ship_RunSim"]
+            list = ["Ship_CreateSim", "Ship_RunSim", "Ship_StopSim"]
             self.appendToolbar("Simulation",list)
         
         # Menu
@@ -55,7 +55,7 @@ class ShipWorkbench ( Workbench ):
         except ImportError:
             pass
         else:
-            list = ["Ship_CreateSim", "Ship_RunSim"]
+            list = ["Ship_CreateSim", "Ship_RunSim", "Ship_StopSim"]
             self.appendToolbar("Simulation",list)
 
 Gui.addWorkbench(ShipWorkbench())

src/Mod/Ship/Makefile.am

@@ -44,6 +44,8 @@ nobase_data_DATA = \
 	Icons/SimCreateIco.xpm \
 	Icons/SimRunIco.png \
 	Icons/SimRunIco.xpm \
+	Icons/SimStopIco.png \
+	Icons/SimStopIco.xpm \
 	Icons/Tank.png \
 	Icons/Tank.xcf \
 	Icons/Tank.xpm \

src/Mod/Ship/ShipGui.py

@@ -144,6 +144,18 @@ class RunSim:
         ToolTip  = str(Translator.translate('Run a simulation'))
         return {'Pixmap' : IconPath, 'MenuText': MenuText, 'ToolTip': ToolTip} 
 
+class StopSim: 
+    def Activated(self):
+        import simRun
+        simRun.stop()
+
+    def GetResources(self):
+        from shipUtils import Paths, Translator
+        IconPath = Paths.iconsPath() + "/SimStopIco.png"
+        MenuText = str(Translator.translate('Stop active simulation'))
+        ToolTip  = str(Translator.translate('Stop active simulation'))
+        return {'Pixmap' : IconPath, 'MenuText': MenuText, 'ToolTip': ToolTip} 
+
 FreeCADGui.addCommand('Ship_LoadExample', LoadExample())
 FreeCADGui.addCommand('Ship_CreateShip', CreateShip())
 FreeCADGui.addCommand('Ship_OutlineDraw', OutlineDraw())
@@ -154,3 +166,4 @@ FreeCADGui.addCommand('Ship_CreateTank', CreateTank())
 FreeCADGui.addCommand('Ship_GZ', GZ())
 FreeCADGui.addCommand('Ship_CreateSim', CreateSim())
 FreeCADGui.addCommand('Ship_RunSim', RunSim())
+FreeCADGui.addCommand('Ship_StopSim', StopSim())

src/Mod/Ship/simRun/Simulation.py

@@ -35,7 +35,18 @@ from FreeCAD import Part, Base, Vector
 # Ship design module
 from shipUtils import Paths, Translator, Math
 
+class Singleton(type):
+    def __init__(cls, name, bases, dct):
+        cls.__instance = None
+        type.__init__(cls, name, bases, dct)
+ 
+    def __call__(cls, *args, **kw):
+        if cls.__instance is None:
+            cls.__instance = type.__call__(cls, *args,**kw)
+        return cls.__instance
+
 class FreeCADShipSimulation(threading.Thread):
+    __metaclass__ = Singleton
     def __init__ (self, device, endTime, output, FSmesh, waves):
         """ Thread constructor.
         @param device Device to use.
@@ -45,6 +56,8 @@ class FreeCADShipSimulation(threading.Thread):
         @param waves Waves parameters (A,T,phi,heading)
         """
         threading.Thread.__init__(self)
+        # Setup as stopped
+        self.active  = False
         # Build OpenCL context and command queue
         self.device  = device
         self.context = cl.Context(devices=[self.device])
@@ -58,8 +71,25 @@ class FreeCADShipSimulation(threading.Thread):
     def run(self):
         """ Runs the simulation.
         """
+        self.active = True
         # Perform work here
+        while self.active:
             print("Im thread, Im running...")
-        time.sleep(2)
+            time.sleep(1)
             # ...
-        print("Im thread, I end!")
+            print("Im thread, step done!")
+        # Set thread as stopped (and prepare it to restarting)
+        self.active = False
+        threading.Event().set()
+        threading.Thread.__init__(self)
+
+    def stop(self):
+        """ Call to stop execution.
+        """
+        self.active = False
+        
+    def isRunning(self):
+        """ Report thread state
+        @return True if thread is running, False otherwise.
+        """
+        return self.active

src/Mod/Ship/simRun/TaskPanel.py

@@ -33,6 +33,8 @@ import SimInstance
 from shipUtils import Paths, Translator
 from Simulation import FreeCADShipSimulation as Sim
 
+import time
+
 class TaskPanel:
     def __init__(self):
         self.ui  = Paths.modulePath() + "/simRun/TaskPanel.ui"
@@ -184,3 +186,18 @@ def createTask():
         Gui.Control.closeDialog(panel)
         return None
     return panel
+
+def stopSimulation():
+    try:
+        simulator = Sim()
+        if not simulator.isRunning():
+            msg = Translator.translate("Simulation already stopped\n")
+            App.Console.PrintWarning(msg)
+            return
+    except:
+        msg = Translator.translate("Any active simulation to stop!\n")
+        App.Console.PrintError(msg)
+        return
+    simulator.stop()
+    msg = Translator.translate("Simulation will stop at the end of actual iteration\n")
+    App.Console.PrintMessage(msg)

src/Mod/Ship/simRun/__init__.py

@@ -34,3 +34,7 @@ import TaskPanel
 def load():
     """ Loads the tool """
     TaskPanel.createTask()
+
+def stop():
+    """ Stops the simulation """
+    TaskPanel.stopSimulation()