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wx.lib.agw.persist.persistencemanager.PersistenceManager¶PersistenceManager: global aspects of persistent windows.
Provides support for automatically saving and restoring object properties to persistent storage.
This class is the central element of wxPython persistence framework, see the Persistent Object Overview in the __init__.py file for its overview.
This is a singleton class and its unique instance can be retrieved using
PersistenceManager.Get() method.
Methods Summary¶Default class constructor. |
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Adds a name to the |
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Globally disables restoring the persistent properties (enabled by default). |
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Globally disables saving the persistent properties (enabled by default). |
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Method used by the persistent objects to restore the data. |
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Method used by the persistent objects to save the data. |
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Globally enables restoring the persistent properties (enabled by default). |
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Globally enables saving the persistent properties (enabled by default). |
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Checks if the object is registered and return the associated |
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Returns the persistent configuration handler for |
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Returns a correctly formatted key name for the object obj and keyName parameters. |
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Returns the |
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Returns a default persistent option directory for |
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Returns the persistent configuration file for |
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Returns the persistent key name inside the configuration file for |
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This method returns |
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Register an object with the manager. |
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Recursively registers and restore the state of the input window and of |
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Restores the state of an object. |
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Recursively restore the state of the input window and of |
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Check if we should restore the widget value, if so pass it to |
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Convenience method, all the action is done in |
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Saves the state of an object. |
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Combines both |
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Check if we persist the widget value, if so pass it to |
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Convenience method, all the action is done in |
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Sets the persistent configuration handler for |
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Sets the |
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Sets the persistent configuration file for |
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Sets the persistent key name inside the configuration file for |
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Unregister the object, this is called by |
Class API¶
Inheritance diagram for class PersistenceManager:
PersistenceManager(object)¶PersistenceManager: global aspects of persistent windows.
Provides support for automatically saving and restoring object properties to persistent storage.
This class is the central element of wxPython persistence framework, see the Persistent Object Overview in the __init__.py file for its overview.
This is a singleton class and its unique instance can be retrieved using
PersistenceManager.Get() method.
__init__(self)¶Default class constructor.
This method should not be called directly: you should use the object
obtained by PersistenceManager.Get() and assign manager styles, custom
configuration files and custom configuration handlers using the appropriate
methods in this class.
Interesting attributes you can set for this class are:
configFile: the persistent configuration file for PersistenceManager,
a custom file name to which FileConfig will access to store and
retrieve UI settings;
configKey: the persistent key name inside the configuration file for
PersistenceManager;
customConfigHandler: the persistent configuration handler for PersistenceManager;
this attribute is an object capable of saving/restoring UI settings. This
can be a cPickle object or a ConfigObj one, for example.
style: a combination of the following values:
Flag name |
Description |
|---|---|
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If a toplevel window has an AUI manager associated, the manager will save and restore its AUI perspective |
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If set, the manager will save items selections in list and tree controls |
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If set, control values will be persisted. This is handy for e.g. applications using a database, where the data (control value) is persisted in the database and persisting it with PM again would only cause confusion. |
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Same as |
Note
An individual window can also set the variable persistValue to
indicate that its value should be saved/restored even so the style
PM_PERSIST_CONTROL_VALUE is not set.
Note
UI settings are stored as dictionaries key <=> tuple: the tuple value contains two items. The first is the value type (i.e., float, int, bool etc…) while the second is the actual key value.
AddBadDefaultName(self, name)¶Adds a name to the BAD_DEFAULT_NAMES constant.
name – a string specifying the control’s default name.
DisableRestoring(self)¶Globally disables restoring the persistent properties (enabled by default).
Note
By default, restoring properties in Restore is enabled but this
function allows to disable it. This is mostly useful for testing.
DisableSaving(self)¶Globally disables saving the persistent properties (enabled by default).
Note
By default, saving properties in Save is enabled but the program
may wish to disable if, for example, it detects that it is running on a
system which shouldn’t be modified in any way and so configuration file
(or Windows registry) shouldn’t be written to.
DoRestoreValue(self, obj, keyName)¶Method used by the persistent objects to restore the data.
By default this method simply use FileConfig but this behaviour may be
overridden by passing a custom config handler in the PersistenceManager
constructor.
obj – an instance of PersistentObject;
keyName – a string specifying the key name.
DoSaveValue(self, obj, keyName, value)¶Method used by the persistent objects to save the data.
By default this method simply use FileConfig but this behaviour may be
overridden by passing a custom configuration handler in the PersistenceManager
constructor.
obj – an instance of PersistentObject;
keyName – a string specifying the key name;
value – the value to store in the configuration file.
EnableRestoring(self)¶Globally enables restoring the persistent properties (enabled by default).
Note
By default, restoring properties in Restore is enabled but this
function allows to disable it. This is mostly useful for testing.
EnableSaving(self)¶Globally enables saving the persistent properties (enabled by default).
Note
By default, saving properties in Save is enabled but the program
may wish to disable if, for example, it detects that it is running on a
system which shouldn’t be modified in any way and so configuration file
(or Windows registry) shouldn’t be written to.
Find(self, window)¶Checks if the object is registered and return the associated PersistentObject
if it is or None otherwise.
window – an instance of wx.Window.
GetConfigurationHandler(self)¶Returns the persistent configuration handler for PersistenceManager.
GetKey(self, obj, keyName)¶Returns a correctly formatted key name for the object obj and keyName parameters.
obj – an instance of PersistentObject;
keyName – a string specifying the key name.
GetManagerStyle(self)¶Returns the PersistenceManager style.
See also
SetManagerStyle for a list of possible styles.
GetPersistenceDirectory(self)¶Returns a default persistent option directory for PersistenceManager.
Note
The return value of this method is not used if you are using your own
custom configuration handler (i.e., by using ConfigObj/ConfigParser/cPickle etc…)
or if you have specified a custom configuration file to use with FileConfig.
GetPersistenceFile(self)¶Returns the persistent configuration file for PersistenceManager.
Note
The return value of this method is not used if you are using your own custom configuration handler (i.e., by using ConfigObj/ConfigParser/cPickle etc…).
GetPersistenceKey(self)¶Returns the persistent key name inside the configuration file for PersistenceManager.
Note
The return value of this method is not used if you are using your own custom configuration handler (i.e., by using ConfigObj/ConfigParser/cPickle etc…).
HasRestored(self)¶This method returns True if any of the windows managed by
PersistenceManager has had its settings restored.
True if any window was restored, False otherwise.
New in version 0.9.7.
Register(self, window, persistenceHandler=None)¶Register an object with the manager.
window – an instance of wx.Window;
persistenceHandler – if not None, this should a custom handler derived
from AbstractHandler.
Note
Note that registering the object doesn’t do anything except allowing to call
Restore for it later. If you want to register the object and restore its
properties, use RegisterAndRestore.
Note
The manager takes ownership of the PersistentObject and will delete it when
it is unregistered.
RegisterAndRestore(self, window)¶Combines both Register and Restore calls.
window – an instance of wx.Window.
RegisterAndRestoreAll(self, window, children=None)¶Recursively registers and restore the state of the input window and of all of its children.
window – an instance of wx.Window;
children – list of children of the input window, on first call it is equal to None.
Restore(self, window)¶Restores the state of an object.
window – an instance of wx.Window.
True if the object properties were restored or False if nothing
was found to restore or the saved settings were invalid.
Note
This methods does nothing if DisableRestoring was called.
RestoreAll(self, window, children=None)¶Recursively restore the state of the input window and of all of its children.
window – an instance of wx.Window;
children – list of children of the input window, on first call it is equal to None.
RestoreCtrlValue(self, obj, keyName)¶Check if we should restore the widget value, if so pass it to DoRestoreValue,
this method checks the style PM_PERSIST_CONTROL_VALUE and if if it is
not set it will also check the variable persistValue of the individual
window.
obj – an instance of PersistentObject;
keyName – a string specifying the key name.
RestoreValue(self, obj, keyName)¶Convenience method, all the action is done in DoRestoreValue.
obj – an instance of PersistentObject;
keyName – a string specifying the key name.
Save(self, window)¶Saves the state of an object.
window – an instance of wx.Window.
Note
This methods does nothing if DisableSaving was called.
SaveAndUnregister(self, window=None)¶Combines both Save and Unregister calls.
window – an instance of wx.Window. If it is None, all the
windows previously registered are saved and then unregistered.
SaveCtrlValue(self, obj, keyName, value)¶Check if we persist the widget value, if so pass it to DoSaveValue,
this method checks the style PM_PERSIST_CONTROL_VALUE and if it is not
set it will also check the variable persistValue of the individual
window.
obj – an instance of PersistentObject;
keyName – a string specifying the key name;
value – the value to store in the configuration file.
SaveValue(self, obj, keyName, value)¶Convenience method, all the action is done in DoSaveValue.
obj – an instance of PersistentObject;
keyName – a string specifying the key name;
value – the value to store in the configuration file.
SetConfigurationHandler(self, handler)¶Sets the persistent configuration handler for PersistenceManager.
handler – an object capable of saving/restoring UI settings. This can be a cPickle object or a ConfigObj one, for example.
Note
UI settings are stored as dictionaries key <=> tuple: the tuple value contains two items. The first is the value type (i.e., float, int, bool etc…) while the second is the actual key value.
SetManagerStyle(self, style)¶Sets the PersistenceManager style.
style – a combination of the following values:
Flag name |
Description |
|---|---|
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If a toplevel window has an AUI manager associated, the manager will save and restore its AUI perspective |
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If set, the manager will save items selections in list and tree controls |
|
If set, control values will be persisted. This is handy for e.g. applications using a database, where the data (control value) is persisted in the database and persisting it with PM again would only cause confusion. |
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Same as |
SetPersistenceFile(self, fileName)¶Sets the persistent configuration file for PersistenceManager.
fileName – the file name where to store the persistent options.
Note
Calling this method has no influence if you are using your own custom configuration handler (i.e., by using ConfigObj/ConfigParser/cPickle etc…).
SetPersistenceKey(self, key)¶Sets the persistent key name inside the configuration file for PersistenceManager.
key – a short meaningful name for your unique preferences key.
Note
Calling this method has no influence if you are using your own custom configuration handler (i.e., by using ConfigObj/ConfigParser/cPickle etc…).
Unregister(self, window)¶Unregister the object, this is called by PersistenceManager itself so there is
usually no need to do it explicitly.
window – an instance of wx.Window, which must have been previously
registered with Register.
Note
For the persistent windows this is done automatically (via SaveAndUnregister)
when the window is destroyed so you only need to call this function explicitly if you
are using custom persistent objects or if you want to prevent the object properties
from being saved.
Note
This deletes the associated PersistentObject.
HasRestoredProp¶This property returns True if any of the windows managed by
PersistenceManager has had its settings restored.
True if any window was restored, False otherwise.
New in version 0.9.7.