/usr/lib/python2.7/dist-packages/chaco/plot_canvas.py is in python-chaco 4.4.1-1.2.
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 75 76 77 78 79 80 | # Enthought library imports
from enable.api import Canvas
from traits.api import Instance, Tuple
# Local, relative chaco imports
from plot_containers import DEFAULT_DRAWING_ORDER
class PlotCanvas(Canvas):
""" The PlotCanvas is basically like Canvas, but we inherit some behaviors
from PlotComponent as well. Some methods are redefined in here to
explicitly make sure we get the right dispatch order.
"""
#-------------------------------------------------------------------------
# Public traits
#-------------------------------------------------------------------------
# Default size to use for resizable components placed onto us.
default_component_size = Tuple(200, 200)
#-------------------------------------------------------------------------
# Inherited traits
#-------------------------------------------------------------------------
# Explicitly use the Chaco drawing order instead of the Enable one
draw_order = Instance(list, args=(DEFAULT_DRAWING_ORDER,))
# Redefine the enable-level set of layers to use "plot" instead
# of "mainlayer". This is the same thing that BasePlotContainer does.
container_under_layers = Tuple("background", "image", "underlay", "plot")
# Override the definition from Component
use_backbuffer = False
#-------------------------------------------------------------------------
# Inherited methods
#-------------------------------------------------------------------------
def draw(self, gc, view_bounds=None, mode="default"):
if self.view_bounds is None:
self.view_bounds = view_bounds
if self.layout_needed:
self.do_layout()
self._draw(gc, view_bounds, mode)
def _dispatch_draw(self, layer, gc, view_bounds, mode):
Canvas._dispatch_draw(self, layer, gc, view_bounds, mode)
def get_preferred_size(self, components=None):
""" Returns the size (width,height) that is preferred for this
components.
"""
if self.view_bounds is not None:
x, y, x2, y2 = self.view_bounds
else:
x, y, x2, y2 = self._bounding_box
return (x2 - x + 1, y2 - y + 1)
def _do_layout(self):
for component in self.components + self.underlays + self.overlays:
if not self._should_layout(component):
continue
bounds = list(component.outer_bounds)
pref_size = list(component.get_preferred_size())
if "h" in component.resizable:
if pref_size[0] > 0:
bounds[0] = pref_size[0]
else:
bounds[0] = self.default_component_size[0]
if "v" in component.resizable:
if pref_size[1] > 0:
bounds[1] = pref_size[1]
else:
bounds[1] = self.default_component_size[1]
component.outer_bounds = bounds
for component in self.components + self.underlays + self.overlays:
component.do_layout()
return
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