/usr/lib/python3/dist-packages/ginga/rv/plugins/Cursor.py is in python3-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o644.
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# Cursor.py -- Cursor plugin for Ginga viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
import platform
import numpy
from ginga import GingaPlugin, toolkit
from ginga.misc import Bunch
from ginga.gw import Widgets, Readout
from ginga.ImageView import ImageViewNoDataError
class Cursor(GingaPlugin.GlobalPlugin):
def __init__(self, fv):
# superclass defines some variables for us, like logger
super(Cursor, self).__init__(fv)
prefs = self.fv.get_preferences()
self.settings = prefs.createCategory('plugin_Cursor')
self.settings.addDefaults(share_readout=True)
self.settings.load(onError='silent')
fv.add_callback('add-channel', self.add_channel_cb)
fv.add_callback('delete-channel', self.delete_channel_cb)
fv.add_callback('field-info', self.field_info_cb)
# TODO: let this become OUR setting
self.share_readout = self.fv.settings.get('share_readout', True)
self.readout = None
def _build_readout(self):
readout = Readout.Readout(-1, 24)
# NOTE: Special hack for certain platforms, otherwise the font
# on the readout is too small
macos_ver = platform.mac_ver()[0]
if len(macos_ver) > 0:
# Mac OS X
readout.set_font('monaco 16')
elif toolkit.get_family().startswith('gtk'):
# Gtk
readout.set_font('fixed 14')
else:
readout.set_font('fixed 11')
return readout
def build_gui(self, container):
if self.share_readout:
self.readout = self._build_readout()
rw = self.readout.get_widget()
container.add_widget(rw, stretch=0)
channel = self.fv.get_channel_info()
if channel is not None:
self.focus_cb(channel.fitsimage, True)
def add_channel_cb(self, viewer, channel):
fi = channel.fitsimage
fi.add_callback('focus', self.focus_cb)
if not self.share_readout:
readout = self._build_readout()
readout.fitsimage = fi
rw = readout.get_widget()
channel.container.add_widget(rw, stretch=0)
else:
# shared readout
readout = self.readout
channel.extdata.readout = readout
def delete_channel_cb(self, viewer, channel):
chname = channel.name
self.logger.debug("deleting channel %s" % (chname))
def start(self):
## names = self.fv.get_channel_names()
## for name in names:
## channel = self.fv.get_channel_info(name)
## self.add_channel_cb(self.fv, channel)
pass
def readout_config(self, fitsimage, image, readout):
self.logger.debug("configuring readout (%s)" % (str(readout)))
# Configure readout for this image.
# Get and store the sizes of the fields necessary to display
# all X, Y coords as well as values.
if image is None:
return True
try:
width, height = fitsimage.get_data_size()
except ImageViewNoDataError as exc: # table
self.logger.debug(str(exc))
return
# Set size of coordinate areas (4 is "." + precision 3)
readout.maxx = len(str(width)) + 4
readout.maxy = len(str(height)) + 4
minval, maxval = image.get_minmax()
readout.maxv = max(len(str(minval)), len(str(maxval)))
return True
def redo(self, channel, image):
readout = channel.extdata.readout
self.readout_config(channel.fitsimage, image, readout)
def change_readout(self, channel, fitsimage):
if (self.share_readout) and (self.readout is not None):
self.logger.debug("configuring readout")
self.readout.fitsimage = fitsimage
image = fitsimage.get_image()
if image is not None:
self.readout_config(fitsimage, image, self.readout)
self.logger.debug("configured readout")
else:
# Get this channel's readout (if any)
self.readout = channel.extdata.get('readout', None)
def focus_cb(self, fitsimage, tf):
if (not tf) or fitsimage is None:
return
chname = self.fv.get_channel_name(fitsimage)
channel = self.fv.get_channel(chname)
self.change_readout(channel, fitsimage)
def field_info_cb(self, viewer, channel, info):
readout = self.readout
if readout is None:
return
fitsimage = channel.fitsimage
## self.logger.debug("fitsimage: %s readout.fitsimage: %s" % (
## str(fitsimage), str(readout.fitsimage)))
if readout.fitsimage != fitsimage:
self.change_readout(channel, fitsimage)
if self.readout is None:
return
readout = self.readout
# If this is a multiband image, then average the values
# for the readout
value = info.value
if isinstance(value, numpy.ndarray):
avg = numpy.average(value)
value = avg
# Update the readout
px_x = "%.3f" % info.x
px_y = "%.3f" % info.y
maxx = max(readout.maxx, len(str(px_x)))
if maxx > readout.maxx:
readout.maxx = maxx
maxy = max(readout.maxy, len(str(px_y)))
if maxy > readout.maxy:
readout.maxy = maxy
maxv = max(readout.maxv, len(str(value)))
if maxv > readout.maxv:
readout.maxv = maxv
if 'ra_txt' in info:
text = "%1.1s: %-14.14s %1.1s: %-14.14s X: %-*.*s Y: %-*.*s Value: %-*.*s" % (
info.ra_lbl, info.ra_txt, info.dec_lbl, info.dec_txt,
maxx, maxx, px_x, maxy, maxy, px_y, maxv, maxv, value)
else:
text = "%1.1s: %-14.14s %1.1s: %-14.14s X: %-*.*s Y: %-*.*s Value: %-*.*s" % (
'', '', '', '',
maxx, maxx, px_x, maxy, maxy, px_y, maxv, maxv, value)
readout.set_text(text)
def __str__(self):
return 'cursor'
#END
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