diff options
Diffstat (limited to 'modules/extensions_framework')
| -rw-r--r-- | modules/extensions_framework/__init__.py | 371 | ||||
| -rw-r--r-- | modules/extensions_framework/ui.py | 337 | ||||
| -rw-r--r-- | modules/extensions_framework/util.py | 232 | ||||
| -rw-r--r-- | modules/extensions_framework/validate.py | 213 |
4 files changed, 1153 insertions, 0 deletions
diff --git a/modules/extensions_framework/__init__.py b/modules/extensions_framework/__init__.py new file mode 100644 index 00000000..df815eb3 --- /dev/null +++ b/modules/extensions_framework/__init__.py @@ -0,0 +1,371 @@ +# -*- coding: utf8 -*- +# +# ***** BEGIN GPL LICENSE BLOCK ***** +# +# -------------------------------------------------------------------------- +# Blender 2.5 Extensions Framework +# -------------------------------------------------------------------------- +# +# Authors: +# Doug Hammond +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, see <http://www.gnu.org/licenses/>. +# +# ***** END GPL LICENCE BLOCK ***** +# +import time + +import bpy + +from extensions_framework.ui import EF_OT_msg +bpy.utils.register_class(EF_OT_msg) +del EF_OT_msg + +def log(str, popup=False, module_name='EF'): + """Print a message to the console, prefixed with the module_name + and the current time. If the popup flag is True, the message will + be raised in the UI as a warning using the operator bpy.ops.ef.msg. + + """ + print("[%s %s] %s" % + (module_name, time.strftime('%Y-%b-%d %H:%M:%S'), str)) + if popup: + bpy.ops.ef.msg( + msg_type='WARNING', + msg_text=str + ) + + +added_property_cache = {} + +def init_properties(obj, props, cache=True): + """Initialise custom properties in the given object or type. + The props list is described in the declarative_property_group + class definition. If the cache flag is False, this function + will attempt to redefine properties even if they have already been + added. + + """ + + if not obj in added_property_cache.keys(): + added_property_cache[obj] = [] + + for prop in props: + try: + if cache and prop['attr'] in added_property_cache[obj]: + continue + + if prop['type'] == 'bool': + t = bpy.props.BoolProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","options","subtype","update"]} + elif prop['type'] == 'bool_vector': + t = bpy.props.BoolVectorProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","options","subtype","size", + "update"]} + elif prop['type'] == 'collection': + t = bpy.props.CollectionProperty + a = {k: v for k,v in prop.items() if k in ["ptype","name", + "description","default","options"]} + a['type'] = a['ptype'] + del a['ptype'] + elif prop['type'] == 'enum': + t = bpy.props.EnumProperty + a = {k: v for k,v in prop.items() if k in ["items","name", + "description","default","options","update"]} + elif prop['type'] == 'float': + t = bpy.props.FloatProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","min","max","soft_min","soft_max", + "step","precision","options","subtype","unit","update"]} + elif prop['type'] == 'float_vector': + t = bpy.props.FloatVectorProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","min","max","soft_min","soft_max", + "step","precision","options","subtype","size","update"]} + elif prop['type'] == 'int': + t = bpy.props.IntProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","min","max","soft_min","soft_max", + "step","options","subtype","update"]} + elif prop['type'] == 'int_vector': + t = bpy.props.IntVectorProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","min","max","soft_min","soft_max", + "options","subtype","size","update"]} + elif prop['type'] == 'pointer': + t = bpy.props.PointerProperty + a = {k: v for k,v in prop.items() if k in ["ptype", "name", + "description","options","update"]} + a['type'] = a['ptype'] + del a['ptype'] + elif prop['type'] == 'string': + t = bpy.props.StringProperty + a = {k: v for k,v in prop.items() if k in ["name", + "description","default","maxlen","options","subtype", + "update"]} + else: + continue + + setattr(obj, prop['attr'], t(**a)) + + added_property_cache[obj].append(prop['attr']) + except KeyError: + # Silently skip invalid entries in props + continue + +class declarative_property_group(bpy.types.PropertyGroup): + """A declarative_property_group describes a set of logically + related properties, using a declarative style to list each + property type, name, values, and other relevant information. + The information provided for each property depends on the + property's type. + + The properties list attribute in this class describes the + properties present in this group. + + Some additional information about the properties in this group + can be specified, so that a UI can be generated to display them. + To that end, the controls list attribute and the visibility dict + attribute are present here, to be read and interpreted by a + property_group_renderer object. + See extensions_framework.ui.property_group_renderer. + + """ + + ef_initialised = False + + """This property tells extensions_framework which bpy.type(s) + to attach this PropertyGroup to. If left as an empty list, + it will not be attached to any type, but its properties will + still be initialised. The type(s) given in the list should be + a string, such as 'Scene'. + + """ + ef_attach_to = [] + + @classmethod + def initialise_properties(cls): + """This is a function that should be called on + sub-classes of declarative_property_group in order + to ensure that they are initialised when the addon + is loaded. + the init_properties is called without caching here, + as it is assumed that any addon calling this function + will also call ef_remove_properties when it is + unregistered. + + """ + + if not cls.ef_initialised: + for property_group_parent in cls.ef_attach_to: + if property_group_parent is not None: + prototype = getattr(bpy.types, property_group_parent) + if not hasattr(prototype, cls.__name__): + init_properties(prototype, [{ + 'type': 'pointer', + 'attr': cls.__name__, + 'ptype': cls, + 'name': cls.__name__, + 'description': cls.__name__ + }], cache=False) + + init_properties(cls, cls.properties, cache=False) + cls.ef_initialised = True + + return cls + + @classmethod + def register_initialise_properties(cls): + """As ef_initialise_properties, but also registers the + class with RNA. Note that this isn't a great idea + because it's non-trivial to unregister the class, unless + you keep track of it yourself. + """ + + bpy.utils.register_class(cls) + cls.initialise_properties() + return cls + + @classmethod + def remove_properties(cls): + """This is a function that should be called on + sub-classes of declarative_property_group in order + to ensure that they are un-initialised when the addon + is unloaded. + + """ + + if cls.ef_initialised: + prototype = getattr(bpy.types, cls.__name__) + for prop in cls.properties: + if hasattr(prototype, prop['attr']): + delattr(prototype, prop['attr']) + + for property_group_parent in cls.ef_attach_to: + if property_group_parent is not None: + prototype = getattr(bpy.types, property_group_parent) + if hasattr(prototype, cls.__name__): + delattr(prototype, cls.__name__) + + cls.ef_initialised = False + + return cls + + + """This list controls the order of property layout when rendered + by a property_group_renderer. This can be a nested list, where each + list becomes a row in the panel layout. Nesting may be to any depth. + + """ + controls = [] + + """The visibility dict controls the visibility of properties based on + the value of other properties. See extensions_framework.validate + for test syntax. + + """ + visibility = {} + + """The enabled dict controls the enabled state of properties based on + the value of other properties. See extensions_framework.validate + for test syntax. + + """ + enabled = {} + + """The alert dict controls the alert state of properties based on + the value of other properties. See extensions_framework.validate + for test syntax. + + """ + alert = {} + + """The properties list describes each property to be created. Each + item should be a dict of args to pass to a + bpy.props.<?>Property function, with the exception of 'type' + which is used and stripped by extensions_framework in order to + determine which Property creation function to call. + + Example item: + { + 'type': 'int', # bpy.props.IntProperty + 'attr': 'threads', # bpy.types.<type>.threads + 'name': 'Render Threads', # Rendered next to the UI + 'description': 'Number of threads to use', # Tooltip text in the UI + 'default': 1, + 'min': 1, + 'soft_min': 1, + 'max': 64, + 'soft_max': 64 + } + + """ + properties = [] + + def draw_callback(self, context): + """Sub-classes can override this to get a callback when + rendering is completed by a property_group_renderer sub-class. + + """ + + pass + + @classmethod + def get_exportable_properties(cls): + """Return a list of properties which have the 'save_in_preset' key + set to True, and hence should be saved into preset files. + + """ + + out = [] + for prop in cls.properties: + if 'save_in_preset' in prop.keys() and prop['save_in_preset']: + out.append(prop) + return out + + def reset(self): + """Reset all properties in this group to the default value, + if specified""" + for prop in self.properties: + pk = prop.keys() + if 'attr' in pk and 'default' in pk and hasattr(self, prop['attr']): + setattr(self, prop['attr'], prop['default']) + +class Addon(object): + """A list of classes registered by this addon""" + static_addon_count = 0 + + addon_serial = 0 + addon_classes = None + bl_info = None + + BL_VERSION = None + BL_IDNAME = None + + def __init__(self, bl_info=None): + self.addon_classes = [] + self.bl_info = bl_info + + # Keep a count in case we have to give this addon an anonymous name + self.addon_serial = Addon.static_addon_count + Addon.static_addon_count += 1 + + if self.bl_info: + self.BL_VERSION = '.'.join(['%s'%v for v in self.bl_info['version']]).lower() + self.BL_IDNAME = self.bl_info['name'].lower() + '-' + self.BL_VERSION + else: + # construct anonymous name + self.BL_VERSION = '0' + self.BL_IDNAME = 'Addon-%03d'%self.addon_serial + + def addon_register_class(self, cls): + """This method is designed to be used as a decorator on RNA-registerable + classes defined by the addon. By using this decorator, this class will + keep track of classes registered by this addon so that they can be + unregistered later in the correct order. + + """ + self.addon_classes.append(cls) + return cls + + def register(self): + """This is the register function that should be exposed in the addon's + __init__. + + """ + for cls in self.addon_classes: + bpy.utils.register_class(cls) + if hasattr(cls, 'ef_attach_to'): cls.initialise_properties() + + def unregister(self): + """This is the unregister function that should be exposed in the addon's + __init__. + + """ + for cls in self.addon_classes[::-1]: # unregister in reverse order + if hasattr(cls, 'ef_attach_to'): cls.remove_properties() + bpy.utils.unregister_class(cls) + + def init_functions(self): + """Returns references to the three functions that this addon needs + for successful class registration management. In the addon's __init__ + you would use like this: + + addon_register_class, register, unregister = Addon().init_functions() + + """ + + return self.register, self.unregister diff --git a/modules/extensions_framework/ui.py b/modules/extensions_framework/ui.py new file mode 100644 index 00000000..4f24d873 --- /dev/null +++ b/modules/extensions_framework/ui.py @@ -0,0 +1,337 @@ +# -*- coding: utf8 -*- +# +# ***** BEGIN GPL LICENSE BLOCK ***** +# +# -------------------------------------------------------------------------- +# Blender 2.5 Extensions Framework +# -------------------------------------------------------------------------- +# +# Authors: +# Doug Hammond +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, see <http://www.gnu.org/licenses/>. +# +# ***** END GPL LICENCE BLOCK ***** +# +import bpy + +from extensions_framework.validate import Logician + +class EF_OT_msg(bpy.types.Operator): + """An operator to show simple messages in the UI""" + bl_idname = 'ef.msg' + bl_label = 'Show UI Message' + msg_type = bpy.props.StringProperty(default='INFO') + msg_text = bpy.props.StringProperty(default='') + def execute(self, context): + self.report({self.properties.msg_type}, self.properties.msg_text) + return {'FINISHED'} + +def _get_item_from_context(context, path): + """Utility to get an object when the path to it is known: + _get_item_from_context(context, ['a','b','c']) returns + context.a.b.c + No error checking is performed other than checking that context + is not None. Exceptions caused by invalid path should be caught in + the calling code. + + """ + + if context is not None: + for p in path: + context = getattr(context, p) + return context + +class property_group_renderer(bpy.types.Panel): + """Mix-in class for sub-classes of bpy.types.Panel. This class + will provide the draw() method which implements drawing one or + more property groups derived from + extensions_framework.declarative_propery_group. + The display_property_groups list attribute describes which + declarative_property_groups should be drawn in the Panel, and + how to extract those groups from the context passed to draw(). + + """ + + """The display_property_groups list attribute specifies which + custom declarative_property_groups this panel should draw, and + where to find that property group in the active context. + Example item: + ( ('scene',), 'myaddon_property_group') + In this case, this renderer will look for properties in + context.scene.myaddon_property_group to draw in the Panel. + + """ + display_property_groups = [] + + def draw(self, context): + """Sub-classes should override this if they need to display + other (object-related) property groups. super().draw(context) + can be a useful call in those cases. + + """ + for property_group_path, property_group_name in \ + self.display_property_groups: + ctx = _get_item_from_context(context, property_group_path) + property_group = getattr(ctx, property_group_name) + for p in property_group.controls: + self.draw_column(p, self.layout, ctx, context, + property_group=property_group) + property_group.draw_callback(context) + + def check_visibility(self, lookup_property, property_group): + """Determine if the lookup_property should be drawn in the Panel""" + vt = Logician(property_group) + if lookup_property in property_group.visibility.keys(): + if hasattr(property_group, lookup_property): + member = getattr(property_group, lookup_property) + else: + member = None + return vt.test_logic(member, + property_group.visibility[lookup_property]) + else: + return True + + def check_enabled(self, lookup_property, property_group): + """Determine if the lookup_property should be enabled in the Panel""" + et = Logician(property_group) + if lookup_property in property_group.enabled.keys(): + if hasattr(property_group, lookup_property): + member = getattr(property_group, lookup_property) + else: + member = None + return et.test_logic(member, + property_group.enabled[lookup_property]) + else: + return True + + def check_alert(self, lookup_property, property_group): + """Determine if the lookup_property should be in an alert state in the Panel""" + et = Logician(property_group) + if lookup_property in property_group.alert.keys(): + if hasattr(property_group, lookup_property): + member = getattr(property_group, lookup_property) + else: + member = None + return et.test_logic(member, + property_group.alert[lookup_property]) + else: + return False + + def is_real_property(self, lookup_property, property_group): + for prop in property_group.properties: + if prop['attr'] == lookup_property: + return prop['type'] not in ['text', 'prop_search'] + + return False + + def draw_column(self, control_list_item, layout, context, + supercontext=None, property_group=None): + """Draw a column's worth of UI controls in this Panel""" + if type(control_list_item) is list: + draw_row = False + + found_percent = None + for sp in control_list_item: + if type(sp) is float: + found_percent = sp + elif type(sp) is list: + for ssp in [s for s in sp if self.is_real_property(s, property_group)]: + draw_row = draw_row or self.check_visibility(ssp, + property_group) + else: + draw_row = draw_row or self.check_visibility(sp, + property_group) + + next_items = [s for s in control_list_item if type(s) in [str, list]] + if draw_row and len(next_items) > 0: + if found_percent is not None: + splt = layout.split(percentage=found_percent) + else: + splt = layout.row(True) + for sp in next_items: + col2 = splt.column() + self.draw_column(sp, col2, context, supercontext, + property_group) + else: + if self.check_visibility(control_list_item, property_group): + + for current_property in property_group.properties: + if current_property['attr'] == control_list_item: + current_property_keys = current_property.keys() + + sub_layout_created = False + if not self.check_enabled(control_list_item, property_group): + last_layout = layout + sub_layout_created = True + + layout = layout.row() + layout.enabled = False + + if self.check_alert(control_list_item, property_group): + if not sub_layout_created: + last_layout = layout + sub_layout_created = True + layout = layout.row() + layout.alert = True + + if 'type' in current_property_keys: + if current_property['type'] in ['int', 'float', + 'float_vector', 'string']: + layout.prop( + property_group, + control_list_item, + text = current_property['name'], + expand = current_property['expand'] \ + if 'expand' in current_property_keys \ + else False, + slider = current_property['slider'] \ + if 'slider' in current_property_keys \ + else False, + toggle = current_property['toggle'] \ + if 'toggle' in current_property_keys \ + else False, + icon_only = current_property['icon_only'] \ + if 'icon_only' in current_property_keys \ + else False, + event = current_property['event'] \ + if 'event' in current_property_keys \ + else False, + full_event = current_property['full_event'] \ + if 'full_event' in current_property_keys \ + else False, + emboss = current_property['emboss'] \ + if 'emboss' in current_property_keys \ + else True, + ) + if current_property['type'] in ['enum']: + if 'use_menu' in current_property_keys and \ + current_property['use_menu']: + layout.prop_menu_enum( + property_group, + control_list_item, + text = current_property['name'] + ) + else: + layout.prop( + property_group, + control_list_item, + text = current_property['name'], + expand = current_property['expand'] \ + if 'expand' in current_property_keys \ + else False, + slider = current_property['slider'] \ + if 'slider' in current_property_keys \ + else False, + toggle = current_property['toggle'] \ + if 'toggle' in current_property_keys \ + else False, + icon_only = current_property['icon_only'] \ + if 'icon_only' in current_property_keys \ + else False, + event = current_property['event'] \ + if 'event' in current_property_keys \ + else False, + full_event = current_property['full_event'] \ + if 'full_event' in current_property_keys \ + else False, + emboss = current_property['emboss'] \ + if 'emboss' in current_property_keys \ + else True, + ) + if current_property['type'] in ['bool']: + layout.prop( + property_group, + control_list_item, + text = current_property['name'], + toggle = current_property['toggle'] \ + if 'toggle' in current_property_keys \ + else False, + icon_only = current_property['icon_only'] \ + if 'icon_only' in current_property_keys \ + else False, + event = current_property['event'] \ + if 'event' in current_property_keys \ + else False, + full_event = current_property['full_event'] \ + if 'full_event' in current_property_keys \ + else False, + emboss = current_property['emboss'] \ + if 'emboss' in current_property_keys \ + else True, + ) + elif current_property['type'] in ['operator']: + args = {} + for optional_arg in ('text', 'icon'): + if optional_arg in current_property_keys: + args.update({ + optional_arg: current_property[optional_arg], + }) + layout.operator( current_property['operator'], **args ) + + elif current_property['type'] in ['menu']: + args = {} + for optional_arg in ('text', 'icon'): + if optional_arg in current_property_keys: + args.update({ + optional_arg: current_property[optional_arg], + }) + layout.menu(current_property['menu'], **args) + + elif current_property['type'] in ['text']: + layout.label( + text = current_property['name'] + ) + + elif current_property['type'] in ['template_list']: + layout.template_list( + current_property['src'](supercontext, context), + current_property['src_attr'], + current_property['trg'](supercontext, context), + current_property['trg_attr'], + rows = 4 \ + if not 'rows' in current_property_keys \ + else current_property['rows'], + maxrows = 4 \ + if not 'rows' in current_property_keys \ + else current_property['rows'], + type = 'DEFAULT' \ + if not 'list_type' in current_property_keys \ + else current_property['list_type'] + ) + + elif current_property['type'] in ['prop_search']: + layout.prop_search( + current_property['trg'](supercontext, + context), + current_property['trg_attr'], + current_property['src'](supercontext, + context), + current_property['src_attr'], + text = current_property['name'], + ) + + elif current_property['type'] in ['ef_callback']: + getattr(self, current_property['method'])(supercontext) + else: + layout.prop(property_group, control_list_item) + + if sub_layout_created: + layout = last_layout + + # Fire a draw callback if specified + if 'draw' in current_property_keys: + current_property['draw'](supercontext, context) + + break diff --git a/modules/extensions_framework/util.py b/modules/extensions_framework/util.py new file mode 100644 index 00000000..124ab5e7 --- /dev/null +++ b/modules/extensions_framework/util.py @@ -0,0 +1,232 @@ +# -*- coding: utf8 -*- +# +# ***** BEGIN GPL LICENSE BLOCK ***** +# +# -------------------------------------------------------------------------- +# Blender 2.5 Extensions Framework +# -------------------------------------------------------------------------- +# +# Authors: +# Doug Hammond +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software Foundation, +# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +# ***** END GPL LICENCE BLOCK ***** +# +import configparser +import datetime +import os +import tempfile +import threading + +import bpy + +"""List of possibly appropriate paths to load/save addon config from/to""" +config_paths = [] +if bpy.utils.user_resource('CONFIG', '') != "": config_paths.append(bpy.utils.user_resource('CONFIG', '', create=True)) +if bpy.utils.user_resource('SCRIPTS', '') != "": config_paths.append(bpy.utils.user_resource('SCRIPTS', '', create=True)) +# want to scan other script paths in reverse order, since the user path comes last +sp = [p for p in bpy.utils.script_paths() if p != ''] +sp.reverse() +config_paths.extend(sp) + +"""This path is set at the start of export, so that calls to +path_relative_to_export() can make all exported paths relative to +this one. +""" +export_path = ''; + +def path_relative_to_export(p): + """Return a path that is relative to the export path""" + global export_path + p = filesystem_path(p) + ep = os.path.dirname(export_path) + + if os.sys.platform[:3] == "win": + # Prevent an error whereby python thinks C: and c: are different drives + if p[1] == ':': p = p[0].lower() + p[1:] + if ep[1] == ':': ep = ep[0].lower() + ep[1:] + + try: + relp = os.path.relpath(p, ep) + except ValueError: # path on different drive on windows + relp = p + + return relp.replace('\\', '/') + +def filesystem_path(p): + """Resolve a relative Blender path to a real filesystem path""" + if p.startswith('//'): + pout = bpy.path.abspath(p) + else: + pout = os.path.realpath(p) + + return pout.replace('\\', '/') + +# TODO: - somehow specify TYPES to get/set from config + +def find_config_value(module, section, key, default): + """Attempt to find the configuration value specified by string key + in the specified section of module's configuration file. If it is + not found, return default. + + """ + global config_paths + fc = [] + for p in config_paths: + if os.path.exists(p) and os.path.isdir(p) and os.access(p, os.W_OK): + fc.append( '/'.join([p, '%s.cfg' % module])) + + if len(fc) < 1: + print('Cannot find %s config file path' % module) + return default + + cp = configparser.SafeConfigParser() + + cfg_files = cp.read(fc) + if len(cfg_files) > 0: + try: + val = cp.get(section, key) + if val == 'true': + return True + elif val == 'false': + return False + else: + return val + except: + return default + else: + return default + +def write_config_value(module, section, key, value): + """Attempt to write the configuration value specified by string key + in the specified section of module's configuration file. + + """ + global config_paths + fc = [] + for p in config_paths: + if os.path.exists(p) and os.path.isdir(p) and os.access(p, os.W_OK): + fc.append( '/'.join([p, '%s.cfg' % module])) + + if len(fc) < 1: + raise Exception('Cannot find a writable path to store %s config file' % + module) + + cp = configparser.SafeConfigParser() + + cfg_files = cp.read(fc) + + if not cp.has_section(section): + cp.add_section(section) + + if value == True: + cp.set(section, key, 'true') + elif value == False: + cp.set(section, key, 'false') + else: + cp.set(section, key, value) + + if len(cfg_files) < 1: + cfg_files = fc + + fh=open(cfg_files[0],'w') + cp.write(fh) + fh.close() + + return True + +def scene_filename(): + """Construct a safe scene filename, using 'untitled' instead of ''""" + filename = os.path.splitext(os.path.basename(bpy.data.filepath))[0] + if filename == '': + filename = 'untitled' + return bpy.path.clean_name(filename) + +def temp_directory(): + """Return the system temp directory""" + return tempfile.gettempdir() + +def temp_file(ext='tmp'): + """Get a temporary filename with the given extension. This function + will actually attempt to create the file.""" + tf, fn = tempfile.mkstemp(suffix='.%s'%ext) + os.close(tf) + return fn + +class TimerThread(threading.Thread): + """Periodically call self.kick(). The period of time in seconds + between calling is given by self.KICK_PERIOD, and the first call + may be delayed by setting self.STARTUP_DELAY, also in seconds. + self.kick() will continue to be called at regular intervals until + self.stop() is called. Since this is a thread, calling self.join() + may be wise after calling self.stop() if self.kick() is performing + a task necessary for the continuation of the program. + The object that creates this TimerThread may pass into it data + needed during self.kick() as a dict LocalStorage in __init__(). + + """ + STARTUP_DELAY = 0 + KICK_PERIOD = 8 + + active = True + timer = None + + LocalStorage = None + + def __init__(self, LocalStorage=dict()): + threading.Thread.__init__(self) + self.LocalStorage = LocalStorage + + def set_kick_period(self, period): + """Adjust the KICK_PERIOD between __init__() and start()""" + self.KICK_PERIOD = period + self.STARTUP_DELAY + + def stop(self): + """Stop this timer. This method does not join()""" + self.active = False + if self.timer is not None: + self.timer.cancel() + + def run(self): + """Timed Thread loop""" + while self.active: + self.timer = threading.Timer(self.KICK_PERIOD, self.kick_caller) + self.timer.start() + if self.timer.isAlive(): self.timer.join() + + def kick_caller(self): + """Intermediary between the kick-wait-loop and kick to allow + adjustment of the first KICK_PERIOD by STARTUP_DELAY + + """ + if self.STARTUP_DELAY > 0: + self.KICK_PERIOD -= self.STARTUP_DELAY + self.STARTUP_DELAY = 0 + + self.kick() + + def kick(self): + """Sub-classes do their work here""" + pass + +def format_elapsed_time(t): + """Format a duration in seconds as an HH:MM:SS format time""" + + td = datetime.timedelta(seconds=t) + min = td.days*1440 + td.seconds/60.0 + hrs = td.days*24 + td.seconds/3600.0 + + return '%i:%02i:%02i' % (hrs, min%60, td.seconds%60) diff --git a/modules/extensions_framework/validate.py b/modules/extensions_framework/validate.py new file mode 100644 index 00000000..d9cee8fd --- /dev/null +++ b/modules/extensions_framework/validate.py @@ -0,0 +1,213 @@ +# -*- coding: utf8 -*- +# +# ***** BEGIN GPL LICENSE BLOCK ***** +# +# -------------------------------------------------------------------------- +# Blender 2.5 Extensions Framework +# -------------------------------------------------------------------------- +# +# Authors: +# Doug Hammond +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, see <http://www.gnu.org/licenses/>. +# +# ***** END GPL LICENCE BLOCK ***** +# +""" +Pure logic and validation class. + +By using a Subject object, and a dict of described logic tests, it +is possible to arrive at a True or False result for various purposes: +1. Data validation +2. UI control visibility + +A Subject can be any object whose members are readable with getattr() : +class Subject(object): + a = 0 + b = 1 + c = 'foo' + d = True + e = False + f = 8 + g = 'bar' + + +Tests are described thus: + +Use the special list types Logic_AND and Logic_OR to describe +combinations of values and other members. Use Logic_Operator for +numerical comparison. + +With regards to Subject, each of these evaluate to True: +TESTA = { + 'a': 0, + 'c': Logic_OR([ 'foo', 'bar' ]), + 'd': Logic_AND([True, True]), + 'f': Logic_AND([8, {'b': 1}]), + 'e': {'b': Logic_Operator({'gte':1, 'lt':3}) }, + 'g': Logic_OR([ 'baz', Logic_AND([{'b': 1}, {'f': 8}]) ]) +} + +With regards to Subject, each of these evaluate to False: +TESTB = { + 'a': 'foo', + 'c': Logic_OR([ 'bar', 'baz' ]), + 'd': Logic_AND([ True, 'foo' ]), + 'f': Logic_AND([9, {'b': 1}]), + 'e': {'b': Logic_Operator({'gte':-10, 'lt': 1}) }, + 'g': Logic_OR([ 'baz', Logic_AND([{'b':0}, {'f': 8}]) ]) +} + +With regards to Subject, this test is invalid +TESTC = { + 'n': 0 +} + +Tests are executed thus: +S = Subject() +L = Logician(S) +L.execute(TESTA) + +""" + +class Logic_AND(list): + pass +class Logic_OR(list): + pass +class Logic_Operator(dict): + pass + +class Logician(object): + """Given a subject and a dict that describes tests to perform on + its members, this class will evaluate True or False results for + each member/test pair. See the examples below for test syntax. + + """ + + subject = None + def __init__(self, subject): + self.subject = subject + + def get_member(self, member_name): + """Get a member value from the subject object. Raise exception + if subject is None or member not found. + + """ + if self.subject is None: + raise Exception('Cannot run tests on a subject which is None') + + return getattr(self.subject, member_name) + + def test_logic(self, member, logic, operator='eq'): + """Find the type of test to run on member, and perform that test""" + + if type(logic) is dict: + return self.test_dict(member, logic) + elif type(logic) is Logic_AND: + return self.test_and(member, logic) + elif type(logic) is Logic_OR: + return self.test_or(member, logic) + elif type(logic) is Logic_Operator: + return self.test_operator(member, logic) + else: + # compare the value, I think using Logic_Operator() here + # allows completeness in test_operator(), but I can't put + # my finger on why for the minute + return self.test_operator(member, + Logic_Operator({operator: logic})) + + def test_operator(self, member, value): + """Execute the operators contained within value and expect that + ALL operators are True + + """ + + # something in this method is incomplete, what if operand is + # a dict, Logic_AND, Logic_OR or another Logic_Operator ? + # Do those constructs even make any sense ? + + result = True + for operator, operand in value.items(): + operator = operator.lower().strip() + if operator in ['eq', '==']: + result &= member==operand + if operator in ['not', '!=']: + result &= member!=operand + if operator in ['lt', '<']: + result &= member<operand + if operator in ['lte', '<=']: + result &= member<=operand + if operator in ['gt', '>']: + result &= member>operand + if operator in ['gte', '>=']: + result &= member>=operand + if operator in ['and', '&']: + result &= member&operand + if operator in ['or', '|']: + result &= member|operand + if operator in ['len']: + result &= len(member)==operand + # I can think of some more, but they're probably not useful. + + return result + + def test_or(self, member, logic): + """Member is a value, logic is a set of values, ANY of which + can be True + + """ + result = False + for test in logic: + result |= self.test_logic(member, test) + + return result + + def test_and(self, member, logic): + """Member is a value, logic is a list of values, ALL of which + must be True + + """ + result = True + for test in logic: + result &= self.test_logic(member, test) + + return result + + def test_dict(self, member, logic): + """Member is a value, logic is a dict of other members to + compare to. All other member tests must be True + + """ + result = True + for other_member, test in logic.items(): + result &= self.test_logic(self.get_member(other_member), test) + + return result + + def execute(self, test): + """Subject is an object, test is a dict of {member: test} pairs + to perform on subject's members. Wach key in test is a member + of subject. + + """ + + for member_name, logic in test.items(): + result = self.test_logic(self.get_member(member_name), logic) + print('member %s is %s' % (member_name, result)) + +# A couple of name aliases +class Validation(Logician): + pass +class Visibility(Logician): + pass |