/usr/lib/python2.7/dist-packages/chaco/svg_graphics_context.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 63 64 65 66 67 68 69 70 71 72 73 74 | """ Defines the PlotGraphicsContext class.
"""
from __future__ import with_statement
from kiva.svg import GraphicsContext
class SVGGraphicsContext(GraphicsContext):
""" A Kiva graphics context, which facilitates rendering plots and plot
components into an offscreen or memory buffer.
Its only real difference from a Kiva graphics context is that this
class correctly offsets the coordinate frame by (0.5, 0.5) and increases
the actual size of the image by 1 pixel in each dimension. When rendering
into on-screen windows through Enable, this transformation step is handled
by Enable.
"""
# FIXME: Right now this does not resize correctly. (But you shouldn't
# resize your GC, anyway!)
def __init__(self, size_or_ary, dpi=72.0, *args, **kw):
scale = dpi / 72.0
if type(size_or_ary) in (list, tuple) and len(size_or_ary) == 2:
size_or_ary = (size_or_ary[0]*scale + 1, size_or_ary[1]*scale + 1)
super(SVGGraphicsContext, self).__init__(size_or_ary, *args, **kw)
self.translate_ctm(0.5, 0.5)
self.scale_ctm(scale, scale)
return
def render_component(self, component, container_coords=False):
""" Renders the given component.
Parameters
----------
component : Component
The component to be rendered.
container_coords : Boolean
Whether to use coordinates of the component's container
Description
-----------
If *container_coords* is False, then the (0,0) coordinate of this
graphics context corresponds to the lower-left corner of the
component's **outer_bounds**. If *container_coords* is True, then the
method draws the component as it appears inside its container, i.e., it
treats (0,0) of the graphics context as the lower-left corner of the
container's outer bounds.
"""
x, y = component.outer_position
if not container_coords:
x = -x
y = -y
# Compute the new x and y scale from the translation
width, height = self.width(), self.height()
width_scale = (width - x) / float(width)
height_scale = (height - y) / float(height)
with self:
self.translate_ctm(x, y)
self.scale_ctm(width_scale, height_scale)
component.draw(self, view_bounds=(0, 0, width, height))
return
def clip_to_rect(self, x, y, width, height):
""" Offsets the coordinate frame by (0.5, 0.5) and increases the actual
size of the image by 1 pixel in each dimension.
Overrides Kiva GraphicsContext.
"""
GraphicsContext.clip_to_rect(self, x-0.5, y-0.5, width+1, height+1)
# EOF
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