/usr/lib/python2.7/dist-packages/chaco/plot_component.py is in python-chaco 4.5.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | """ Defines the PlotComponent class.
"""
# Enthought library imports
from enable.api import Component
from enable.kiva_graphics_context import GraphicsContext
from traits.api import Bool, Instance, Str
DEFAULT_DRAWING_ORDER = ["background", "image", "underlay", "plot",
"selection", "border", "annotation", "overlay"]
class PlotComponent(Component):
"""
PlotComponent is the base class for all plot-related visual components.
It defines the various methods related to layout and tool handling,
which virtually every subclass uses or needs to be aware of.
Several of these top-level layout and draw methods have implementations
that must not be overridden; instead, subclasses implement various
protected stub methods.
"""
#------------------------------------------------------------------------
# Rendering control traits
#------------------------------------------------------------------------
# The order in which various rendering classes on this component are drawn.
# Note that if this component is placed in a container, in most cases
# the container's draw order is used, since the container calls
# each of its contained components for each rendering pass.
# Typically, the definitions of the layers are:
#
# 1. 'background': Background image, shading
# 2. 'image': A special layer for plots that render as images. This is in
# a separate layer since these plots must all render before non-image
# plots.
# 3. 'underlay': Axes and grids
# 4. 'plot': The main plot area itself
# 5. 'selection': Selected content are rendered above normal plot elements
# to make them stand out
# 6. 'border': Plot borders
# 7. 'annotation': Lines and text that are conceptually part of the "plot"
# but need to be rendered on top of everything else in the plot
# 8. 'overlay': Legends, selection regions, and other tool-drawn visual
# elements
draw_order = Instance(list, args=(DEFAULT_DRAWING_ORDER,))
# The default draw layer for Chaco plot components is the "plot" layer
draw_layer = Str("plot")
# Draw layers in **draw_order**? If False, use _do_draw() (for backwards
# compatibility).
use_draw_order = Bool(True)
def _use_draw_order_changed(self, old, new):
""" Handler to catch the case when someone is trying to use the
old-style drawing mechanism, which is now unsupported.
"""
if new == False:
raise RuntimeError("The old-style drawing mechanism is no longer " \
"supported in Chaco.")
|