Store a copy of params in CurveCommand._add_to_command_stack.

[hooke.git] / hooke / plugin / curve.py

diff --git a/hooke/plugin/curve.py b/hooke/plugin/curve.py
index 931dca3e69ef6e033da4d034ea28467c32263ec2..b287ee4fa11bd5ad96f10de2269c6523ebd81bad 100644 (file)
--- a/hooke/plugin/curve.py
+++ b/hooke/plugin/curve.py
@@ -41,15 +41,20 @@ from .playlist import current_playlist_callback
 
 # Define common or complicated arguments
 
-def current_curve_callback(hooke, command, argument, value):
+def current_curve_callback(hooke, command, argument, value, load=True):
     if value != None:
         return value
     playlist = current_playlist_callback(hooke, command, argument, value)
-    curve = playlist.current()
+    curve = playlist.current(load=load)
     if curve == None:
         raise Failure('No curves in %s' % playlist)
     return curve
 
+def unloaded_current_curve_callback(hooke, command, argument, value):
+    return current_curve_callback(
+        hooke=hooke, command=command, argument=argument, value=value,
+        load=False)
+
 CurveArgument = Argument(
     name='curve', type='curve', callback=current_curve_callback,
     help="""
@@ -132,7 +137,7 @@ class CurveCommand (Command):
                 pass  # no need to place duplicate calls on the stack.
             else:
                 curve.command_stack.append(CommandMessage(
-                        self.name, params))
+                        self.name, dict(params)))
 
 
 class BlockCommand (CurveCommand):
@@ -446,7 +451,7 @@ Name of the new column for storing the difference (without units, defaults to
 
     def _run(self, hooke, inqueue, outqueue, params):
         self._add_to_command_stack(params)
-        params = self.__setup_params(hooke=hooke, params=params)
+        params = self._setup_params(hooke=hooke, params=params)
         data_A = self._get_column(hooke=hooke, params=params,
                                   block_name='block A',
                                   column_name='column A')
@@ -459,7 +464,7 @@ Name of the new column for storing the difference (without units, defaults to
                          column_name='output column',
                          values=out)
 
-    def __setup_params(self, hooke, params):
+    def _setup_params(self, hooke, params):
         curve = self._curve(hooke, params)
         if params['block A'] == None:
             params['block A'] = curve.data[0].info['name']
@@ -521,7 +526,7 @@ central differencing.
 
     def _run(self, hooke, inqueue, outqueue, params):
         self._add_to_command_stack(params)
-        params = self.__setup_params(hooke=hooke, params=params)
+        params = self._setup_params(hooke=hooke, params=params)
         x_data = self._get_column(hooke=hooke, params=params,
                                   column_name='x column')
         f_data = self._get_column(hooke=hooke, params=params,
@@ -532,7 +537,7 @@ central differencing.
                          column_name='output column',
                          values=d)
 
-    def __setup_params(self, hooke, params):
+    def _setup_params(self, hooke, params):
         curve = self._curve(hooke, params)
         x_name,x_unit = split_data_label(params['x column'])
         f_name,f_unit = split_data_label(params['f column'])
@@ -586,7 +591,7 @@ Otherwise, the chunks are end-to-end, and not overlapping.
 
     def _run(self, hooke, inqueue, outqueue, params):
         self._add_to_command_stack(params)
-        params = self.__setup_params(hooke=hooke, params=params)
+        params = self._setup_params(hooke=hooke, params=params)
         data = self._get_column(hooke=hooke, params=params)
         bounds = params['bounds']
         if bounds != None:
@@ -610,7 +615,7 @@ Otherwise, the chunks are end-to-end, and not overlapping.
                          values=power)
         outqueue.put(b)
 
-    def __setup_params(self, hooke, params):
+    def _setup_params(self, hooke, params):
         if params['output block'] in self._block_names(hooke, params):
             raise Failure('output block %s already exists in %s.'
                           % (params['output block'],
@@ -634,6 +639,11 @@ class ClearStackCommand (CurveCommand):
         super(ClearStackCommand, self).__init__(
             name='clear curve command stack',
             help=self.__doc__, plugin=plugin)
+        i,arg = [(i,arg) for i,arg in enumerate(self.arguments)
+                 if arg.name == 'curve'][0]
+        arg = copy.copy(arg)
+        arg.callback = unloaded_current_curve_callback
+        self.arguments[i] = arg
 
     def _run(self, hooke, inqueue, outqueue, params):
         curve = self._curve(hooke, params)