class GvPqueryLayer - Point Query Layer

Declared in module gview

Inheritance hierarchy:

gview.GvPqueryLayer
  gview.GvShapesLayer
    gview.GvShapeLayer
      gview.GvLayer
        gview.GvData
          gtk.GtkData

Synopsis

class GvPqueryLayer(GvShapesLayer):
    def gview.GvPqueryLayer.__init__(self, _obj=None)
    def gview.GvPqueryLayer.launch_properties(self)

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

    # Inherited from gview.GvShapesLayer
    def gview.GvShapesLayer.__init__(self, shapes=None, _obj=None)
    def gview.GvShapesLayer.launch_properties(self)

    # Inherited from gview.GvShapeLayer
    def gview.GvShapeLayer.__init__(self, _obj=None)
    def gview.GvShapeLayer.get_selected(self) # Get list of currently selected objects.
    def gview.GvShapeLayer.set_color(self, color) # Set the drawing color.

    # Inherited from gview.GvLayer
    def gview.GvLayer.__init__(self, _obj=None)
    def gview.GvLayer.display_change(self) # Send a display property notification.
    def gview.GvLayer.extents(self) # Return extents of layer.
    def gview.GvLayer.is_visible(self) # Check if layer is visible.
    def gview.GvLayer.launch_properties(self) # Launch a properties panel for this layer.
    def gview.GvLayer.reproject(self, projection) # Attempt to change view projection.
    def gview.GvLayer.set_visible(self, visible) # Set layer visibility.

    # 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 gview.GvData
    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.

Description

This layer is intended to only hold points, but this isn't strictly enforced. For each point in this layer, coordinate and/or raster values are displayed beside the point.

The following properties have special interpretation for a GvPqueryLayer. Note that modifying these properties does not automatically trigger a display-change signal ... please call display_change() manually.

_point_color: RGBA value used for point and text color.
_point_size: Size of point cross hairs in screen pixels
_pixel_mode: One of "off" or "on" indicating if pixel raster values should be displayed for each query point.
_coordinate_mode: One of "off", "raster", "georef", or "latlong" indicating what coordinate system the coordinates should be displayed in (or skipped for off).

Note that the above property values can also be set on individual shapes to override drawing style on a per-shape basis.

gview.GvShapeLayer.get_selected(self)

Get list of currently selected objects.

The list of shape id's is returned as a list.

gview.GvShapeLayer.set_color(self, color)

Set the drawing color.

This method is deprecated.

gview.GvLayer.extents(self)

Return extents of layer.

The extents are returned as a tuple (xmin,ymin,xmax,ymax).

gview.GvLayer.launch_properties(self)

Launch a properties panel for this layer.

Returns the dialog object, or None if none can be created.

gview.GvLayer.reproject(self, projection)

Attempt to change view projection.

Currently this only works for rasters, but eventually it will modify the display projection of any kind of GvLayer.

Returns 0 on failure, or non-zero on success.

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.