class GvData - Base class for various raster and vector data containers.

Declared in module gview

Inheritance hierarchy:

gview.GvData
gtk.GtkData

Synopsis

class GvData(GtkData):
    def gview.GvData.__init__(self, _obj=None)
    def gview.GvData.changed(self) # Emit GvData changed signal.
    def gview.GvData.get_name(self) # Fetch the name of this GvData.
    def gview.GvData.get_parent(self) # Fetch parent GvData object.
    def gview.GvData.get_projection(self) # Fetch projection, if any.
    def gview.GvData.get_properties(self) # Get GvData properties (attributes) as a dictionary.
    def gview.GvData.get_property(self, name) # Get a GvData property.
    def gview.GvData.set_name(self, name) # Set the name of this GvData.
    def gview.GvData.set_projection(self, projection) # Set the projection.
    def gview.GvData.set_property(self, name, value) # Set a GvData property.

    # Inherited from gtk.GtkObject
    def gtk.GtkObject.__cmp__(self, other)
    def gtk.GtkObject.__getattr__(self, attr)
    def gtk.GtkObject.__getitem__(self, key)
    def gtk.GtkObject.__hash__(self)
    def gtk.GtkObject.__init__(self, _obj=None)
    def gtk.GtkObject.__setitem__(self, key, v)
    def gtk.GtkObject.connect(self, name, f, *extra)
    def gtk.GtkObject.connect(self, name, f, *extra)
    def gtk.GtkObject.connect_after(self, name, f, *extra)
    def gtk.GtkObject.connect_after(self, name, f, *extra)
    def gtk.GtkObject.connect_object(self, name, f, obj, *extra)
    def gtk.GtkObject.connect_object(self, name, f, obj, *extra)
    def gtk.GtkObject.connect_object_after(self, name, f, obj, *extra)
    def gtk.GtkObject.destroy(self, _obj=None)
    def gtk.GtkObject.disconnect(self, id)
    def gtk.GtkObject.emit(self, signal, *args)
    def gtk.GtkObject.emit_stop_by_name(self, sig)
    def gtk.GtkObject.flags(self, mask=None)
    def gtk.GtkObject.get_data(self, key)
    def gtk.GtkObject.remove_data(self, key)
    def gtk.GtkObject.set(self, dict)
    def gtk.GtkObject.set_data(self, key, value)
    def gtk.GtkObject.set_flags(self, flags)
    def gtk.GtkObject.signal_handler_block(self, id)
    def gtk.GtkObject.signal_handler_unblock(self, id)
    def gtk.GtkObject.signal_handlers_destroy(self)
    def gtk.GtkObject.unset_flags(self, flags)

    # Inherited from gtk.GtkData
    def gtk.GtkData.__init__(self, _obj=None)

Description

All GvDatas have a name string, common undo semantics, and changing/changed event notication semantics.

Signals:

changing: Indicates that the underlying data is going to be changed. This will trigger capture of an undo memento if undo is enabled for this object.
changed: Indicates that the underlying data has changed.

Note that the change_info for changing and changed varies depending on the particular type of object. In particular, GvRaster can carry the modified region, and shape containing objects can have a list of shapes.

gview.GvData.changed(self)

Emit GvData changed signal.

Send a notification that this data has changed, with a NULL change_info value.

gview.GvData.get_parent(self)

Fetch parent GvData object.

This is typically used to get the underlying GvData on which a GvLayer (which is also a GvData) depends.

gview.GvData.get_projection(self)

Fetch projection, if any.

The projection is normally expressed in OpenGIS Well Known Text format or an empty string if no value is available.

gview.GvData.get_properties(self)

Get GvData properties (attributes) as a dictionary.

The properties are returned as a Python dictionary. Note that changes to this dictionary are not applied back to the GvData.

gview.GvData.get_property(self, name)

Get a GvData property.

name: the key or name of the property being set. Should be a well behaved token (no spaces, equal signs, or colons).

NOTE: Returns None if property does not exist.

gview.GvData.set_projection(self, projection)

Set the projection.

This method won't actually modify the data geometry, only the interpretation of the geometry.

gview.GvData.set_property(self, name, value)

Set a GvData property.

name: the key or name of the property being set. Should be a well behaved token (no spaces, equal signs, or colons).
value: the value to be assigned. Any text is acceptable.