/usr/lib/python2.7/dist-packages/chaco/tools/point_marker.py is in python-chaco 4.5.0-1.
This file is owned by root:root, with mode 0o644.
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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 81 82 83 84 85 86 87 88 | """ Defines the PointMarker tool class.
"""
from __future__ import with_statement
# Major library imports
from numpy import array, take, transpose
# Enthought library imports
from enable.api import BaseTool, ColorTrait
from traits.api import Enum, Float
class PointMarker(BaseTool):
""" This tool looks at an XY plot's index data source and draws a
line corresponding to the index indicated by the "selections" metadata.
"""
# The axis that this tool is parallel to.
axis = Enum("index", "value")
# This tool is visible (overrides BaseTool).
visible = True
# This tool is drawn as an overlay (overrides BaseTool).
draw_mode = "overlay"
# TODO:STYLE
# The color of the line.
color = ColorTrait("red")
# The width of the line, in pixels.
line_width = Float(1.0)
def draw(self, gc, view_bounds=None):
""" Draws this tool on a graphics context.
Implements BaseTool.
"""
# Draw the component in interactive mode
plot = self.component
if plot is not None:
# selections should be a list of indices on the datasource
indices = getattr(plot, self.axis).metadata["selections"]
if len(indices) == 0:
return
index_pts = take(plot.index.get_data(), indices)
value_pts = take(plot.value.get_data(), indices)
data_pts = transpose(array((index_pts, value_pts)))
screen_pts = plot.map_screen(data_pts)
if self.axis == "index":
if plot.orientation == "h":
self._draw_vertical_lines(gc, screen_pts)
else:
self._draw_horizontal_lines(gc, screen_pts)
else: # self.axis == "value"
if plot.orientation == "h":
self._draw_horizontal_lines(gc, screen_pts)
else:
self._draw_vertical_lines(gc, screen_pts)
return
#------------------------------------------------------------------------
# Private methods
#------------------------------------------------------------------------
def _draw_vertical_lines(self, gc, points):
with gc:
gc.set_stroke_color(self.color_)
for pt in points:
gc.move_to(int(pt[0])+0.5, self.component.y)
gc.line_to(int(pt[0])+0.5, self.component.y2)
gc.stroke_path()
return
def _draw_horizontal_lines(self, gc, points):
with gc:
gc.set_stroke_color(self.color_)
for pt in points:
gc.move_to(self.component.x, int(pt[1])+0.5)
gc.line_to(self.component.x2, int(pt[1])+0.5)
gc.stroke_path()
return
# EOF
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