Merge branch 'master' of git.sugarlabs.org:turtleart/mainline

11 files changed, 94 insertions, 130 deletions

diff --git a/TurtleArt/taconstants.py b/TurtleArt/taconstants.py
index 43ae9bc..1cedaa3 100644
--- a/TurtleArt/taconstants.py
+++ b/TurtleArt/taconstants.py
@@ -344,7 +344,7 @@ MACROS = {
      [5, ['number', '0.1'], 0, 0, [4, None]],
      [6, 'kbinput', 0, 0, [4, None]]],
     'picturelist':
-    [[0, 'sandwichtop_no_label', 0, 0, [None, 1]],
+    [[0, ['sandwichclamp', 252], 0, 0, [None, 1, None]],
      [1, 'penup', 0, 0, [0, 2]],
      [2, 'setxy2', 0, 0, [1, 3, 4, 5]],
      [3, 'titlex', 0, 0, [2, None]],
@@ -361,12 +361,11 @@ MACROS = {
      [14, 'pendown', 0, 0, [11, 15]],
      [15, 'setscale', 0, 0, [14, 16, 17]],
      [16, ['number', '67'], 0, 0, [15, None]],
-     [17, 'list', 0, 0, [15, 18, 19, 20]],
+     [17, 'list', 0, 0, [15, 18, 19, None]],
      [18, ['string', '∙ '], 0, 0, [17, None]],
-     [19, ['string', '∙ '], 0, 0, [17, None]],
-     [20, 'sandwichbottom', 0, 0, [17, None]]],
+     [19, ['string', '∙ '], 0, 0, [17, None]]],
     'picture1x1a':
-    [[0, 'sandwichtop_no_label', 0, 0, [None, 1]],
+    [[0, ['sandwichclamp', 231], 0, 0, [None, 1, None]],
      [1, 'penup', 0, 0, [0, 2]],
      [2, 'setxy2', 0, 0, [1, 3, 4, 5]],
      [3, 'titlex', 0, 0, [2, None]],
@@ -383,11 +382,10 @@ MACROS = {
      [14, 'pendown', 0, 0, [11, 15]],
      [15, 'setscale', 0, 0, [14, 16, 17]],
      [16, ['number', '90'], 0, 0, [15, None]],
-     [17, 'showaligned', 0, 0, [15, 18, 19]],
-     [18, 'journal', 0, 0, [17, None]],
-     [19, 'sandwichbottom', 0, 0, [17, None]]],
+     [17, 'showaligned', 0, 0, [15, 18, None]],
+     [18, 'journal', 0, 0, [17, None]]],
     'picture2x2':
-    [[0, 'sandwichtop_no_label', 0, 0, [None, 1]],
+    [[0, ['sandwichclamp', 546], 0, 0, [None, 1, None]],
      [1, 'penup', 0, 0, [0, 2]],
      [2, 'setxy2', 0, 0, [1, 3, 4, 5]],
      [3, 'titlex', 0, 0, [2, None]],
@@ -425,11 +423,10 @@ MACROS = {
      [35, 'rightx', 0, 0, [34, None]],
      [36, 'bottomy', 0, 0, [34, None]],
      [37, 'pendown', 0, 0, [34, 38]],
-     [38, 'showaligned', 0, 0, [37, 39, 40]],
-     [39, 'journal', 0, 0, [38, None]],
-     [40, 'sandwichbottom', 0, 0, [38, None]]],
+     [38, 'showaligned', 0, 0, [37, 39, None]],
+     [39, 'journal', 0, 0, [38, None]]],
     'picture1x2':
-    [[0, 'sandwichtop_no_label', 0, 0, [None, 1]],
+    [[0, ['sandwichclamp', 546], 0, 0, [None, 1, None]],
      [1, 'penup', 0, 0, [0, 2]],
      [2, 'setxy2', 0, 0, [1, 3, 4, 5]],
      [3, 'titlex', 0, 0, [2, None]],
@@ -467,11 +464,10 @@ MACROS = {
      [35, 'rightx', 0, 0, [34, None]],
      [36, 'bottomy', 0, 0, [34, None]],
      [37, 'pendown', 0, 0, [34, 38]],
-     [38, 'showaligned', 0, 0, [37, 39, 40]],
-     [39, 'description', 0, 0, [38, None]],
-     [40, 'sandwichbottom', 0, 0, [38, None]]],
+     [38, 'showaligned', 0, 0, [37, 39, None]],
+     [39, 'description', 0, 0, [38, None]]],
     'picture2x1':
-    [[0, 'sandwichtop_no_label', 0, 0, [None, 1]],
+    [[0, ['sandwichclamp', 546], 0, 0, [None, 1, None]],
      [1, 'penup', 0, 0, [0, 2]],
      [2, 'setxy2', 0, 0, [1, 3, 4, 5]],
      [3, 'titlex', 0, 0, [2, None]],
@@ -509,11 +505,10 @@ MACROS = {
      [35, 'rightx', 0, 0, [34, None]],
      [36, 'bottomy', 0, 0, [34, None]],
      [37, 'pendown', 0, 0, [34, 38]],
-     [38, 'showaligned', 0, 0, [37, 39, 40]],
-     [39, 'description', 0, 0, [38, None]],
-     [40, 'sandwichbottom', 0, 0, [38, None]]],
+     [38, 'showaligned', 0, 0, [37, 39, None]],
+     [39, 'description', 0, 0, [38, None]]],
     'picture1x1':
-    [[0, 'sandwichtop_no_label', 0, 0, [None, 1]],
+    [[0, ['sandwichclamp', 336], 0, 0, [None, 1, None]],
      [1, 'penup', 0, 0, [0, 2]],
      [2, 'setxy2', 0, 0, [1, 3, 4, 5]],
      [3, 'titlex', 0, 0, [2, None]],
@@ -537,9 +532,8 @@ MACROS = {
      [21, 'rightx', 0, 0, [20, None]],
      [22, 'topy', 0, 0, [20, None]],
      [23, 'pendown', 0, 0, [20, 24]],
-     [24, 'showaligned', 0, 0, [23, 25, 26]],
-     [25, 'description', 0, 0, [24, None]],
-     [26, 'sandwichbottom', 0, 0, [24, None]]],
+     [24, 'showaligned', 0, 0, [23, 25, None]],
+     [25, 'description', 0, 0, [24, None]]],
     'reskin':
     [[0, 'skin', 0, 0, [None, 1, None]],
      [1, 'journal', 0, 0, [0, None]]]}
diff --git a/TurtleArt/taexportpython.py b/TurtleArt/taexportpython.py
index 76087ad..49bde06 100644
--- a/TurtleArt/taexportpython.py
+++ b/TurtleArt/taexportpython.py
@@ -33,7 +33,7 @@ from talogo import LogoCode
 from taprimitive import (ast_yield_true, Primitive, PyExportError,
                          value_to_ast)
 from tautils import (debug_output, find_group, find_top_block, get_stack_name)
-
+from tawindow import global_objects
 
 
 _SETUP_CODE_START = """\
@@ -66,10 +66,11 @@ def %s():
 """
 _START_STACK_START_ADD = """\
     tw.start_plugins()
+    global_objects = tw.get_global_objects()
 """
 _ACTION_STACK_PREAMBLE = """\
-    turtle = tw.turtles.get_active_turtle()
     turtles = tw.turtles
+    turtle = turtles.get_active_turtle()
     canvas = tw.canvas
     logo = tw.lc
 
@@ -83,7 +84,7 @@ PAT_IDENTIFIER_ILLEGAL_CHAR = re.compile("[^A-Za-z0-9_]")
 
 
 def save_python(tw):
-    """ Find all the action stacks and turn each into python code """
+    """ Find all the action stacks and turn each into Python code """
     all_blocks = tw.just_blocks()
     blocks_covered = set()
     tops_of_stacks = []
@@ -98,22 +99,23 @@ def save_python(tw):
     for block in tops_of_stacks:
         stack_name = get_stack_name(block)
         if stack_name:
-            pythoncode = _action_stack_to_python(block, tw.lc, name=stack_name)
+            pythoncode = _action_stack_to_python(block, tw, name=stack_name)
             snippets.append(pythoncode)
             snippets.append(linesep)
     snippets.append(_SETUP_CODE_END)
     return "".join(snippets)
 
-def _action_stack_to_python(block, lc, name="start"):
-    """ Turn a stack of blocks into python code
+def _action_stack_to_python(block, tw, name="start"):
+    """ Turn a stack of blocks into Python code
     name -- the name of the action stack (defaults to "start") """
+
     if isinstance(name, int):
         name = float(name)
     if not isinstance(name, basestring):
         name = str(name)
 
     # traverse the block stack and get the AST for every block
-    ast_list = _walk_action_stack(block, lc)
+    ast_list = _walk_action_stack(block, tw.lc)
     if not isinstance(ast_list[-1], ast.Yield):
         ast_list.append(ast_yield_true())
     action_stack_ast = ast.Module(body=ast_list)
@@ -126,6 +128,11 @@ def _action_stack_to_python(block, lc, name="start"):
     name_id = _make_identifier(name)
     if name == 'start':
         pre_preamble = _START_STACK_START_ADD
+        # TODO: only add the objects we are using
+        for k in global_objects.keys():
+            if k not in ['window', 'canvas', 'logo', 'turtles']:
+                pre_preamble += "    %s = global_objects['%s']\n" % (
+                    k.lower(), k)
     else:
         pre_preamble = ''
     generated_code = _indent(generated_code, 1)
@@ -255,5 +262,3 @@ def _indent(code, num_levels=1):
     for line in line_list:
         new_line_list.append(indentation + line)
     return linesep.join(new_line_list)
-
-
diff --git a/TurtleArt/talogo.py b/TurtleArt/talogo.py
index 2b297ef..1ee11f2 100644
--- a/TurtleArt/talogo.py
+++ b/TurtleArt/talogo.py
@@ -1054,6 +1054,17 @@ class LogoCode:
             gobject.idle_add(self.tw.send_event, event)
             os.remove(tmp_file)
 
+    def showlist(self, objects):
+        """ Display list of media objects """
+        x = (self.tw.turtles.get_active_turtle().get_xy()[0] /
+             self.tw.coord_scale)
+        y = (self.tw.turtles.get_active_turtle().get_xy()[1] /
+             self.tw.coord_scale)
+        for obj in objects:
+            self.tw.turtles.get_active_turtle().set_xy(x, y, pendown=False)
+            self.show(obj)
+            y -= int(self.tw.canvas.textsize * self.tw.lead)
+
     def show(self, obj, center=False):
         """ Show is the general-purpose media-rendering block. """
         # media
diff --git a/TurtleArt/taprimitive.py b/TurtleArt/taprimitive.py
index 112540a..3f922b4 100644
--- a/TurtleArt/taprimitive.py
+++ b/TurtleArt/taprimitive.py
@@ -33,7 +33,7 @@ from talogo import (LogoCode, logoerror, NegativeRootError)
 from taturtle import (Turtle, Turtles)
 from tatype import *
 from tautils import debug_output
-from tawindow import (global_objects, TurtleArtWindow)
+from tawindow import TurtleArtWindow, global_objects
 from util import ast_extensions
 
 
@@ -138,6 +138,14 @@ class Primitive(object):
             func_name = "logo.heap."
         elif self.wants_tawindow():
             func_name = "tw."
+        else:
+            results, plugin = self.wants_plugin()
+            if results:
+                for k in global_objects.keys():
+                    if k == plugin:
+                        func_name = k.lower() + '.'
+                        break
+
         # get the name of the function directly from the function itself
         func_name += self.func.__name__
         return func_name
@@ -290,6 +298,10 @@ class Primitive(object):
                 first_arg = global_objects["logo"].heap
             elif new_prim.wants_tawindow():
                 first_arg = global_objects["window"]
+            else:
+                result, plugin = new_prim.wants_plugin()
+                if result:
+                    first_arg = plugin
 
         # execute the actual function
         if first_arg is None:
@@ -556,6 +568,14 @@ class Primitive(object):
         as its first argument? """
         return self._wants(TurtleArtWindow)
 
+    def wants_plugin(self):
+        """Does this Primitive want to get a plugin instance as its first
+        argument? """
+        for obj in global_objects.keys():
+            if self._wants(global_objects[obj].__class__):
+                return True, obj
+        return False, None
+
     def wants_nothing(self):
         """ Does this Primitive want nothing as its first argument? I.e. does 
         it want to be passed all the arguments of the block and nothing 
@@ -727,7 +747,8 @@ class Primitive(object):
 
     @staticmethod
     def comment(text):
-        """ In 'snail' execution mode, display the comment. Else, do nothing. """
+        """In 'snail' execution mode, display the comment. Else, do
+        nothing."""
         tw = global_objects["window"]
         if not tw.hide and tw.step_time != 0:
             tw.showlabel('print', text)
diff --git a/TurtleArt/tawindow.py b/TurtleArt/tawindow.py
index 5d8f715..448dbf3 100644
--- a/TurtleArt/tawindow.py
+++ b/TurtleArt/tawindow.py
@@ -96,7 +96,8 @@ _UNFULLSCREEN_VISIBILITY_TIMEOUT = 2
 _PLUGIN_SUBPATH = 'plugins'
 _MACROS_SUBPATH = 'macros'
 
-global_objects = {}  # the global instances of single-instance classes
+# the global instances of single-instance classes
+global_objects = {}
 
 
 class TurtleArtWindow():
@@ -315,6 +316,9 @@ class TurtleArtWindow():
             self._init_plugins()
             self._setup_plugins()
 
+    def get_global_objects(self):
+        return global_objects
+
     def _lazy_init(self):
         self._init_plugins()
         self._setup_plugins()
@@ -388,10 +392,11 @@ class TurtleArtWindow():
             # Add the icon dir to the icon_theme search path
             self._add_plugin_icon_dir(os.path.join(self._get_plugin_home(),
                                                    plugin_dir))
+            # Add the plugin to the list of global objects
+            global_objects[plugin_class] = self.turtleart_plugins[-1]
         except Exception as e:
             debug_output('Failed to load %s: %s' % (plugin_class, str(e)),
                          self.running_sugar)
-            
 
     def _add_plugin_icon_dir(self, dirname):
         ''' If there is an icon subdir, add it to the search path. '''
diff --git a/plugins/accelerometer/accelerometer.py b/plugins/accelerometer/accelerometer.py
index 26aefd4..c364235 100644
--- a/plugins/accelerometer/accelerometer.py
+++ b/plugins/accelerometer/accelerometer.py
@@ -35,6 +35,7 @@ ACCELEROMETER_DEVICE = '/sys/devices/platform/lis3lv02d/position'
 class Accelerometer(Plugin):
 
     def __init__(self, parent):
+        Plugin.__init__(self)
         self._parent = parent
         if os.path.exists(ACCELEROMETER_DEVICE):
             self._status = True
diff --git a/plugins/audio_sensors/audio_sensors.py b/plugins/audio_sensors/audio_sensors.py
index 8d45395..1e0ed01 100644
--- a/plugins/audio_sensors/audio_sensors.py
+++ b/plugins/audio_sensors/audio_sensors.py
@@ -57,6 +57,7 @@ def _avg(array, abs_value=False):
 class Audio_sensors(Plugin):
 
     def __init__(self, parent):
+        Plugin.__init__(self)
         self._parent = parent
         self._status = True  # TODO: test for audio device
         # These flags are referenced by audiograb
diff --git a/plugins/camera_sensor/camera_sensor.py b/plugins/camera_sensor/camera_sensor.py
index 6509a88..585174c 100644
--- a/plugins/camera_sensor/camera_sensor.py
+++ b/plugins/camera_sensor/camera_sensor.py
@@ -39,6 +39,7 @@ from TurtleArt.taconstants import MEDIA_SHAPES, NO_IMPORT, SKIN_PATHS, \
 class Camera_sensor(Plugin):
 
     def __init__(self, parent):
+        Plugin.__init__(self)
         ''' Make sure there is a camera device '''
         self._parent = parent
         self._status = False
diff --git a/plugins/light_sensor/light_sensor.py b/plugins/light_sensor/light_sensor.py
index bd5655e..97ab6b6 100644
--- a/plugins/light_sensor/light_sensor.py
+++ b/plugins/light_sensor/light_sensor.py
@@ -35,6 +35,7 @@ LIGHT_SENSOR_DEVICE = '/sys/devices/platform/olpc-ols.0/level'
 class Light_sensor(Plugin):
 
     def __init__(self, parent):
+        Plugin.__init__(self)
         self._parent = parent
         if os.path.exists(LIGHT_SENSOR_DEVICE):
             self._status = True
diff --git a/plugins/rfid/rfid.py b/plugins/rfid/rfid.py
index de96a1f..1b3bc48 100644
--- a/plugins/rfid/rfid.py
+++ b/plugins/rfid/rfid.py
@@ -41,6 +41,7 @@ REGEXP_SERUSB = '\/org\/freedesktop\/Hal\/devices\/usb_device['\
 class Rfid(Plugin):
 
     def __init__(self, parent):
+        Plugin.__init__(self)
         self._parent = parent
         self._status = False
 
diff --git a/plugins/turtle_blocks_extras/turtle_blocks_extras.py b/plugins/turtle_blocks_extras/turtle_blocks_extras.py
index 9136a83..c900a3c 100644
--- a/plugins/turtle_blocks_extras/turtle_blocks_extras.py
+++ b/plugins/turtle_blocks_extras/turtle_blocks_extras.py
@@ -49,6 +49,7 @@ class Turtle_blocks_extras(Plugin):
     from Turtle Art """
 
     def __init__(self, turtle_window):
+        Plugin.__init__(self)
         self.tw = turtle_window
 
     def setup(self):
@@ -298,7 +299,6 @@ complete'))
                           help_string=_('resume playing video or audio'))
         self.tw.lc.def_prim('mediaplay', 0, self.tw.lc.media_play, True)
 
-        primitive_dictionary['speak'] = self._prim_speak
         palette.add_block('speak',
                           style='basic-style-1arg',
                           label=_('speak'),
@@ -306,7 +306,8 @@ complete'))
                           default=_('hello'),
                           help_string=_('speaks text'))
         self.tw.lc.def_prim('speak', 1,
-                            lambda self, x: primitive_dictionary['speak'](x))
+                            Primitive(self.prim_speak,
+                                      arg_descs=[ArgSlot(TYPE_STRING)]))
 
         primitive_dictionary['sinewave'] = self._prim_sinewave
         palette.add_block('sinewave',
@@ -734,6 +735,7 @@ module found in the Journal'))
                           help_string=_('loads a block'))
         self.tw.lc.def_prim('loadblock', 1,
                             Primitive(self.tw.prim_load_block,
+                                      export_me=False,
                                       arg_descs=[ArgSlot(TYPE_STRING)]))
 
         palette.add_block('loadblock2arg',
@@ -746,6 +748,7 @@ module found in the Journal'))
                           help_string=_('loads a block'))
         self.tw.lc.def_prim('loadblock2', 2,
                             Primitive(self.tw.prim_load_block,
+                                      export_me=False,
                                       arg_descs=[ArgSlot(TYPE_STRING),
                                                  ArgSlot(TYPE_OBJECT)]))
 
@@ -759,6 +762,7 @@ module found in the Journal'))
                           help_string=_('loads a block'))
         self.tw.lc.def_prim('loadblock3', 3,
                             Primitive(self.tw.prim_load_block,
+                                      export_me=False,
                                       arg_descs=[ArgSlot(TYPE_STRING),
                                                  ArgSlot(TYPE_OBJECT),
                                                  ArgSlot(TYPE_OBJECT)]))
@@ -772,6 +776,7 @@ module found in the Journal'))
                           help_string=_('selects a palette'))
         self.tw.lc.def_prim('loadpalette', 1,
                             Primitive(self.tw.prim_load_palette,
+                                      export_me=False,
                                       arg_descs=[ArgSlot(TYPE_STRING)]))
 
         palette.add_block('addturtle',
@@ -889,8 +894,9 @@ templates'),
                           label=_('Fullscreen').lower(),
                           prim_name='fullscreen',
                           help_string=_('hides the Sugar toolbars'))
-        self.tw.lc.def_prim('fullscreen', 0,
-                            lambda self: self.tw.set_fullscreen())
+        self.tw.lc.def_prim(
+            'fullscreen', 0,
+            Primitive(self.tw.set_fullscreen, export_me=False))
 
         primitive_dictionary['bulletlist'] = self._prim_list
         palette.add_block('list',
@@ -1128,12 +1134,6 @@ Journal objects'))
                                               chr(self.tw.keyboard))
         self.tw.keypress = ''
 
-    def _prim_list(self, blklist):
-        """ Expandable list block """
-        self._prim_showlist(blklist)
-        self.tw.lc.ireturn()
-        yield True
-
     def after_pop(self, *ignored_args):
         if self.tw.lc.update_values:
             if not self.tw.lc.heap:
@@ -1156,7 +1156,7 @@ Journal objects'))
         """ Save SVG to file """
         self.tw.save_as_image(name, svg=True)
 
-    def _prim_speak(self, text):
+    def prim_speak(self, text):
         """ Speak text """
         if type(text) == float and int(text) == text:
             text = int(text)
@@ -1267,88 +1267,11 @@ Journal objects'))
                 'see',
                 self.tw.turtles.get_active_turtle().get_color_index())
 
-    def _prim_show(self, string, center=False):
-        """ Show is the general-purpose media-rendering block. """
-        if type(string) == str or type(string) == unicode:
-            if string in ['media_', 'descr_', 'audio_', 'video_',
-                          'media_None', 'descr_None', 'audio_None',
-                          'video_None']:
-                pass
-            elif string[0:6] in ['media_', 'descr_', 'audio_', 'video_']:
-                self.tw.lc.filepath = None
-                self.tw.lc.pixbuf = None  # Camera writes directly to pixbuf
-                self.tw.lc.dsobject = None
-                if string[6:].lower() in media_blocks_dictionary:
-                    media_blocks_dictionary[string[6:].lower()]()
-                elif os.path.exists(string[6:]):  # is it a path?
-                    self.tw.lc.filepath = string[6:]
-                elif self.tw.running_sugar:  # is it a datastore object?
-                    from sugar.datastore import datastore
-                    try:
-                        self.tw.lc.dsobject = datastore.get(string[6:])
-                    except:
-                        debug_output("Couldn't find dsobject %s" %
-                                     (string[6:]), self.tw.running_sugar)
-                    if self.tw.lc.dsobject is not None:
-                        self.tw.lc.filepath = self.tw.lc.dsobject.file_path
-                if self.tw.lc.pixbuf is not None:
-                    self.tw.lc.insert_image(center=center, pixbuf=True)
-                elif self.tw.lc.filepath is None:
-                    if self.tw.lc.dsobject is not None:
-                        self.tw.showlabel(
-                            'nojournal',
-                            self.tw.lc.dsobject.metadata['title'])
-                    else:
-                        self.tw.showlabel('nojournal', string[6:])
-                    debug_output("Couldn't open %s" % (string[6:]),
-                                 self.tw.running_sugar)
-                elif string[0:6] == 'media_':
-                    self.tw.lc.insert_image(center=center)
-                elif string[0:6] == 'descr_':
-                    mimetype = None
-                    if self.tw.lc.dsobject is not None and \
-                       'mime_type' in self.tw.lc.dsobject.metadata:
-                        mimetype = self.tw.lc.dsobject.metadata['mime_type']
-                    description = None
-                    if self.tw.lc.dsobject is not None and \
-                       'description' in self.tw.lc.dsobject.metadata:
-                        description = self.tw.lc.dsobject.metadata[
-                            'description']
-                    self.tw.lc.insert_desc(mimetype, description)
-                elif string[0:6] == 'audio_':
-                    self.tw.lc.play_sound()
-                elif string[0:6] == 'video_':
-                    self.tw.lc.play_video()
-                if self.tw.lc.dsobject is not None:
-                    self.tw.lc.dsobject.destroy()
-            else:  # assume it is text to display
-                x, y = self.tw.lc.x2tx(), self.tw.lc.y2ty()
-                if center:
-                    y -= self.tw.canvas.textsize
-                self.tw.turtles.get_active_turtle().draw_text(string, x, y,
-                                         int(self.tw.canvas.textsize *
-                                             self.tw.lc.scale / 100.),
-                                         self.tw.canvas.width - x)
-        elif type(string) == float or type(string) == int:
-            string = round_int(string)
-            x, y = self.tw.lc.x2tx(), self.tw.lc.y2ty()
-            if center:
-                y -= self.tw.canvas.textsize
-            self.tw.turtles.get_active_turtle().draw_text(string, x, y,
-                                     int(self.tw.canvas.textsize *
-                                         self.tw.lc.scale / 100.),
-                                     self.tw.canvas.width - x)
-
-    def _prim_showlist(self, sarray):
-        """ Display list of media objects """
-        x = (self.tw.turtles.get_active_turtle().get_xy()[0] /
-             self.tw.coord_scale)
-        y = (self.tw.turtles.get_active_turtle().get_xy()[1] /
-             self.tw.coord_scale)
-        for s in sarray:
-            self.tw.turtles.get_active_turtle().set_xy(x, y, pendown=False)
-            self._prim_show(s)
-            y -= int(self.tw.canvas.textsize * self.tw.lead)
+    def _prim_list(self, blklist):
+        """ Expandable list block """
+        self.tw.lc.showlist(blklist)
+        self.tw.lc.ireturn()
+        yield True
 
     def after_time(self, elapsed_time):
         """ Update the label of the 'time' block after computing the new