/usr/lib/python2.7/dist-packages/ginga/rv/plugins/Header.py is in python-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o644.
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# Header.py -- Image header plugin for Ginga viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
from collections import OrderedDict
from ginga import GingaPlugin
from ginga.misc import Bunch
from ginga.gw import Widgets
class Header(GingaPlugin.GlobalPlugin):
def __init__(self, fv):
# superclass defines some variables for us, like logger
super(Header, self).__init__(fv)
self._image = None
self.active = None
self.info = None
self.columns = [('Keyword', 'key'),
('Value', 'value'),
('Comment', 'comment'),
]
prefs = self.fv.get_preferences()
self.settings = prefs.createCategory('plugin_Header')
self.settings.addDefaults(sortable=False,
color_alternate_rows=True,
max_rows_for_col_resize=5000)
self.settings.load(onError='silent')
fv.add_callback('add-channel', self.add_channel)
fv.add_callback('delete-channel', self.delete_channel)
fv.add_callback('channel-change', self.focus_cb)
def build_gui(self, container):
nb = Widgets.StackWidget()
self.nb = nb
container.add_widget(nb, stretch=1)
def _create_header_window(self, info):
vbox = Widgets.VBox()
vbox.set_margins(2, 2, 2, 2)
color_alternate = self.settings.get('color_alternate_rows', True)
table = Widgets.TreeView(auto_expand=True,
use_alt_row_color=color_alternate)
self.table = table
table.setup_table(self.columns, 1, 'key')
vbox.add_widget(table, stretch=1)
# create sort toggle
cb = Widgets.CheckBox("Sortable")
cb.add_callback('activated', lambda w, tf: self.set_sortable_cb(info))
hbox = Widgets.HBox()
hbox.add_widget(cb, stretch=0)
hbox.add_widget(Widgets.Label(''), stretch=1)
vbox.add_widget(hbox, stretch=0)
# toggle sort
if self.settings.get('sortable', False):
cb.set_state(True)
info.setvals(widget=vbox, table=table, sortw=cb)
return vbox
def set_header(self, info, image):
if self._image == image:
# we've already handled this header
return
self.logger.debug("setting header")
header = image.get_header()
table = info.table
is_sorted = info.sortw.get_state()
tree_dict = OrderedDict()
keys = list(header.keys())
if is_sorted:
keys.sort()
for key in keys:
card = header.get_card(key)
# tree_dict[key] = Bunch.Bunch(key=card.key,
# value=str(card.value),
# comment=card.comment,
# __terminal__=True)
tree_dict[key] = card
table.set_tree(tree_dict)
# Resize column widths
n_rows = len(tree_dict)
if n_rows < self.settings.get('max_rows_for_col_resize', 5000):
table.set_optimal_column_widths()
self.logger.debug("Resized columns for {0} row(s)".format(n_rows))
self.logger.debug("setting header done ({0})".format(is_sorted))
self._image = image
def add_channel(self, viewer, channel):
chname = channel.name
info = Bunch.Bunch(chname=chname)
sw = self._create_header_window(info)
self.nb.add_widget(sw)
# index = self.nb.index_of(sw)
info.setvals(widget=sw)
channel.extdata._header_info = info
def delete_channel(self, viewer, channel):
chname = channel.name
self.logger.debug("deleting channel %s" % (chname))
info = channel.extdata._header_info
widget = info.widget
self.nb.remove(widget, delete=True)
self.active = None
self.info = None
def focus_cb(self, viewer, channel):
chname = channel.name
if self.active != chname:
if not channel.extdata.has_key('_header_info'):
self.add_channel(viewer, channel)
info = channel.extdata._header_info
widget = info.widget
index = self.nb.index_of(widget)
self.nb.set_index(index)
self.active = chname
self.info = info
image = channel.get_current_image()
if image is None:
return
self.set_header(self.info, image)
def start(self):
names = self.fv.get_channel_names()
for name in names:
channel = self.fv.get_channel(name)
self.add_channel(self.fv, channel)
def redo(self, channel, image):
"""This is called when buffer is modified."""
self._image = None # Skip cache checking in set_header()
chname = channel.name
info = channel.extdata._header_info
self.set_header(info, image)
def set_sortable_cb(self, info):
self._image = None
channel = self.fv.get_channel(info.chname)
image = channel.get_current_image()
self.set_header(info, image)
def __str__(self):
return 'header'
# END
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