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Viewing changes to config/DisplayConfigger.py

  • Committer: Robert Pastierovic
  • Date: 2007-10-07 10:08:42 UTC
  • Revision ID: pastierovic@gmail.com-20071007100842-fdvp2vzmqgh1j87k
merged 0.3x branch and basic documentation and some other changes

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config/DisplayConfigger.py
 
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from ConfigDialog import ConfigDialog
 
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from StateSaver import StateSaver
 
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from utils.datatypes import *
 
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class DisplayConfigger(ConfigDialog):
 
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    """
 
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      Configuration Dialog for the displays. This class handles loading / saving
 
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      the configuration.
 
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    """
 
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    def __init__(self, ident, path):
 
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        # init the StateSaver
 
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        self.__backend = StateSaver(ident + "CONFIG")
 
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        # may we save already, or is it too early?
 
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        self.__may_save = False
 
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        # ID for storing the configuration
 
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        self.__ident = ident
 
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        # the scripting environment with which the config interacts
 
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        self.__scripting_environment = None
 
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        ConfigDialog.__init__(self, path)
 
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        self.set_property("title", _("Configuration"))
 
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    #
 
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    # Sets the scripting environment to be used.
 
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    #
 
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    def set_scripting_environment(self, script):
 
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        self.__scripting_environment = script
 
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        self._set_setter(self.__setter_wrapper)
 
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        self._set_getter(self.__scripting_environment.get_value)
 
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        self._set_caller(self.__scripting_environment.call_function)
 
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    #
 
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    # Wraps the config setter handler to include saving config.
 
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    #
 
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    def __setter_wrapper(self, key, value, datatype):
 
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        assert key
 
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        self.__scripting_environment.set_value(key, value)
 
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        # save config, but not too early
 
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        if (self.__may_save):
 
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            rep = dtype_repr(datatype, value)
 
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            self.__backend.set_key(key, (rep, dtype_name(datatype)))
 
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    #
 
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    # Build preferences and put elements into the scripting environment
 
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    #
 
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    def build(self, items):
 
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        ConfigDialog.build(self, items)
 
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        for c in self.get_config_items():
 
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            ident = c.get_prop("id")
 
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            if (ident):
 
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                self.__scripting_environment.add_element("Prefs", ident, c)
 
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    #
 
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    # Loads the initial configuration.
 
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    #
 
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    def load_config(self):
 
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        # read stored configuration
 
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        for key in self.__backend.list():
 
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            if (key.endswith("_TYPE")): continue
 
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            rep, dtype = self.__backend.get_key(key)
 
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            datatype = dtype_get_type(dtype)
 
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            value = dtype_build(datatype, rep)
 
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            try:
 
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                self.__setter_wrapper(key, value, None)
 
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            except:
 
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                log("Couldn't pass arguments (%s, %s) to setter."
 
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                    % (key, value))
 
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        # have the children update themselves
 
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        for c in self.get_config_items(): c.update()
 
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    #
 
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    # Removes the configuration.
 
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    #
 
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    def remove_config(self):
 
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        self.__backend.remove()
 
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    def show(self):
 
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        self.__may_save = True
 
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        ConfigDialog.show(self)