wx.dataview.DataViewItemObjectMapper¶This class provides a mechanism for mapping between Python objects and the
DataViewItem objects used by the DataViewModel for tracking the items in
the view. The ID used for the item is the id() of the Python object. Use
ObjectToItem to create a DataViewItem using a Python object as its ID,
and use ItemToObject to fetch that Python object again later for a given
DataViewItem.
By default a regular dictionary is used to implement the ID to object
mapping. Optionally a WeakValueDictionary can be useful when there will be
a high turnover of objects and maintaining an extra reference to the
objects would be unwise. If weak references are used then the objects
associated with data items must be weak-referenceable. (Things like
stock lists and dictionaries are not.) See UseWeakRefs.
This class is used in PyDataViewModel as a mixin for convenience.
Class Hierarchy¶
Inheritance diagram for class DataViewItemObjectMapper:

Methods Summary¶Retrieve the object that was used to create an item. |
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Create a |
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Switch to or from using a weak value dictionary for keeping the |
Class API¶wx.dataview.DataViewItemObjectMapper(object)¶This class provides a mechanism for mapping between Python objects and the
DataViewItem objects used by the DataViewModel for tracking the items in
the view. The ID used for the item is the id() of the Python object. Use
ObjectToItem to create a DataViewItem using a Python object as its ID,
and use ItemToObject to fetch that Python object again later for a given
DataViewItem.
By default a regular dictionary is used to implement the ID to object
mapping. Optionally a WeakValueDictionary can be useful when there will be
a high turnover of objects and maintaining an extra reference to the
objects would be unwise. If weak references are used then the objects
associated with data items must be weak-referenceable. (Things like
stock lists and dictionaries are not.) See UseWeakRefs.
This class is used in PyDataViewModel as a mixin for convenience.
__init__(self)¶ItemToObject(self, item)¶Retrieve the object that was used to create an item.
ObjectToItem(self, obj)¶Create a DataViewItem for the object, and remember the ID–>obj mapping.
UseWeakRefs(self, flag)¶Switch to or from using a weak value dictionary for keeping the ID to object map.