/usr/lib/python2.7/dist-packages/chaco/shell/session.py is in python-chaco 4.4.1-1.2.
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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 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | """ Defines the PlotSession class.
"""
# Enthoght library imports
from chaco.array_plot_data import ArrayPlotData
from chaco.default_colormaps import *
from traits.api import Any, Bool, Dict, HasTraits, Instance, Int, \
List, Property, Trait, Str
# Local, relative imports
from plot_window import PlotWindow
from preferences import Preferences
class PlotSession(HasTraits):
"""
Encapsulates all of the session-level globals, including preferences,
windows, etc.
"""
# The preferences object in effect for this session.
prefs = Instance(Preferences, args=())
# The list of currently active windows.
windows = List(PlotWindow)
# A dict mapping names to windows.
window_map = Dict(Str, PlotWindow)
# The current hold state.
hold = Bool(False)
# The session holds a single ArrayPlotData instance to which it adds unnamed
# arrays that are provided to various plotting commands.
data = Instance(ArrayPlotData, args=())
#------------------------------------------------------------------------
# "active" pointers
#------------------------------------------------------------------------
# The index of the active window.
active_window_index = Trait(None, None, Int)
# The active window.
active_window = Property
# The active colormap.
colormap = Trait(jet, Any)
def new_window(self, name=None, title=None, is_image=False):
"""Creates a new window and returns the index into the **windows** list
for the new window.
"""
new_win = PlotWindow(
is_image=is_image,
size=(self.prefs.window_width, self.prefs.window_height),
bgcolor=self.prefs.bgcolor,
image_default_origin=self.prefs.image_default_origin,
)
new_win.data = self.data
new_win.get_container().data = self.data
new_win.session = self
if title is not None:
new_win.set_title(title)
elif name != None:
new_win.set_title(name)
else:
new_win.set_title(self.prefs.default_window_name)
self.windows.append(new_win)
if name != None:
self.window_map[name] = new_win
return len(self.windows)-1
def get_window(self, ident):
""" Retrieves a window either by index or by name """
if isinstance(ident, basestring):
return self.window_map.get(ident, None)
elif type(ident) == int and ident < len(self.windows):
return self.windows[ident]
else:
return None
def del_window(self, ident):
""" Deletes the specified window.
Parameters
----------
ident : string or number
The name of the window in **window_map**, or the index of the
window in **windows**.
"""
if isinstance(ident, basestring):
if ident in self.window_map:
win = self.window_map[ident]
del self.window_map[ident]
else:
return
elif type(ident) == int:
if ident >= len(self.windows):
print "No such window %d." % ident
win = self.windows.pop(ident)
if len(self.windows) == 0:
self.active_window = None
elif self.active_window_index >= ident:
self.active_window_index -= 1
if win in self.window_map.values():
# we have to go through the whole dict and remove all keys
# that correspond to the deleted window
for k, v in self.window_map.items():
if v == win:
del self.window_map[k]
else:
return
def _get_active_window(self):
if self.active_window_index is not None:
return self.windows[self.active_window_index]
else:
return None
def _set_active_window(self, win):
if win in self.windows:
self.active_window_index = self.windows.index(win)
elif win is None:
self.active_window_index = None
else:
raise RuntimeError, "That window is not part of this session."
def _colormap_changed(self):
plots = []
for w in self.windows:
container = w.get_container()
for vals in container.plots.values():
plots.extend(vals)
for p in plots:
if hasattr(p, "color_mapper"):
p.color_mapper = self.colormap(p.color_mapper.range)
p.invalidate_draw()
p.request_redraw()
elif hasattr(p, "colors"):
if isinstance(p.colors, basestring) or \
isinstance(p.colors, AbstractColormap):
p.colors = color_map_dict[self.colormap]
# EOF
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