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MultiDim.py
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MultiDim.py
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#
# MultiDim.py -- Multidimensional plugin for fits viewer
#
# Eric Jeschke (eric@naoj.org)
#
# Copyright (c) Eric R. Jeschke. All rights reserved.
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
from ginga.gtkw import GtkHelp, gtksel
import gtk
from ginga import AstroImage
from ginga.util import wcs
from ginga import GingaPlugin
class MultiDim(GingaPlugin.LocalPlugin):
def __init__(self, fv, fitsimage):
# superclass defines some variables for us, like logger
super(MultiDim, self).__init__(fv, fitsimage)
self.curhdu = 0
self.naxispath = []
def build_gui(self, container):
vbox1 = gtk.VBox()
self.msgFont = self.fv.getFont("sansFont", 14)
tw = gtk.TextView()
tw.set_wrap_mode(gtk.WRAP_WORD)
tw.set_left_margin(4)
tw.set_right_margin(4)
tw.set_editable(False)
tw.set_left_margin(4)
tw.set_right_margin(4)
tw.modify_font(self.msgFont)
self.tw = tw
fr = gtk.Frame(label=" Instructions ")
fr.set_shadow_type(gtk.SHADOW_ETCHED_OUT)
fr.set_label_align(0.1, 0.5)
fr.add(tw)
fr.show_all()
vbox1.pack_start(fr, padding=4, fill=True, expand=False)
fr = gtk.Frame(label="HDU")
fr.set_shadow_type(gtk.SHADOW_ETCHED_IN)
fr.set_label_align(0.5, 0.5)
captions = [("Num HDUs", 'label'), ("Choose HDU", 'spinbutton')]
w, b = GtkHelp.build_info(captions)
self.w.update(b)
self.w.numhdu = b.num_hdus
self.w.hdu = b.choose_hdu
self.w.hdu.set_tooltip_text("Choose which HDU to view")
if not gtksel.have_gtk3:
self.w.hdu.set_update_policy(gtk.UPDATE_DISCONTINUOUS)
self.w.hdu.connect('value-changed', self.set_hdu_cb)
fr.add(w)
vbox1.pack_start(fr, padding=4, fill=True, expand=False)
fr = gtk.Frame(label="NAXIS")
fr.set_shadow_type(gtk.SHADOW_ETCHED_IN)
fr.set_label_align(0.5, 0.5)
self.naxisfr = fr
vbox1.pack_start(fr, padding=4, fill=True, expand=False)
btns = gtk.HButtonBox()
btns.set_layout(gtk.BUTTONBOX_START)
btns.set_spacing(3)
btn = gtk.Button("Close")
btn.connect('clicked', lambda w: self.close())
btns.add(btn)
vbox1.pack_start(btns, padding=4, fill=True, expand=False)
vbox1.show_all()
cw = container.get_widget()
cw.pack_start(vbox1, padding=0, fill=True, expand=True)
def set_hdu_cb(self, w):
idx = int(w.get_value())
self.set_hdu(idx)
def _make_slider(self, lower, upper):
adj = gtk.Adjustment(lower=lower, upper=upper)
adj.set_value(lower)
scale = gtk.HScale(adj)
#scale.set_size_request(200, -1)
scale.set_digits(0)
scale.set_draw_value(True)
scale.set_value_pos(gtk.POS_BOTTOM)
# if not gtksel.have_gtk3:
# scale.set_update_policy(gtk.UPDATE_DISCONTINUOUS)
scale.add_mark(lower, gtk.POS_BOTTOM, "%d" % lower)
scale.add_mark(upper, gtk.POS_BOTTOM, "%d" % upper)
return scale
def _make_spin(self, lower, upper):
#adj = gtk.Adjustment(lower=lower, upper=upper)
adj = gtk.Adjustment()
adj.configure(lower, lower, upper, 1, 1, 0)
adj.set_value(lower)
scale = GtkHelp.SpinButton(adj)
scale.set_digits(0)
scale.set_wrap(True)
scale.set_snap_to_ticks(True)
# if not gtksel.have_gtk3:
# scale.set_update_policy(gtk.UPDATE_DISCONTINUOUS)
return scale
def build_naxis(self, dims):
# build a vbox of NAXIS controls
captions = [("NAXIS1", 'label'), ("NAXIS2", 'label')]
self.naxispath = []
for n in xrange(2, len(dims)):
self.naxispath.append(0)
key = 'naxis%d' % (n+1)
title = key.upper()
maxn = int(dims[n])
self.logger.debug("NAXIS%d=%d" % (n+1, maxn))
if maxn <= 1:
captions.append((title, 'label'))
else:
captions.append((title, 'label',
"Choose %s" % (title), 'spinbutton'))
w, b = GtkHelp.build_info(captions)
for n in xrange(0, len(dims)):
key = 'naxis%d' % (n+1)
lbl = b[key]
maxn = int(dims[n])
lbl.set_text("%d" % maxn)
slkey = 'choose_'+key
if b.has_key(slkey):
slider = b[slkey]
adj = slider.get_adjustment()
lower = 1
upper = maxn
adj.configure(lower, lower, upper, 1, 1, 0)
adj.set_value(lower)
slider.set_digits(0)
slider.set_wrap(True)
slider.set_snap_to_ticks(True)
slider.connect('value-changed', self.set_naxis_cb, n)
if not gtksel.have_gtk3:
slider.set_update_policy(gtk.UPDATE_DISCONTINUOUS)
# Add vbox of naxis controls to gui
try:
oldv = self.naxisfr.get_child()
self.naxisfr.remove(oldv)
except:
pass
self.naxisfr.add(w)
self.naxisfr.show_all()
def close(self):
chname = self.fv.get_channelName(self.fitsimage)
self.fv.stop_operation_channel(chname, str(self))
return True
def instructions(self):
buf = self.tw.get_buffer()
buf.set_text("""Use mouse wheel to choose HDU or axis of data cube.""")
self.tw.modify_font(self.msgFont)
def start(self):
self.instructions()
self.resume()
def pause(self):
pass
def resume(self):
self.redo()
def stop(self):
try:
self.fits_f.close()
except:
pass
self.fv.showStatus("")
def set_hdu(self, idx):
self.logger.debug("Loading fits hdu #%d" % (idx))
image = AstroImage.AstroImage(logger=self.logger)
try:
hdu = self.fits_f[idx-1]
dims = list(hdu.data.shape)
dims.reverse()
image.load_hdu(hdu)
image.set(path=self.path)
self.fitsimage.set_image(image)
self.build_naxis(dims)
self.curhdu = idx-1
self.logger.debug("hdu #%d loaded." % (idx))
except Exception, e:
errmsg = "Error loading fits hdu #%d: %s" % (
idx, str(e))
self.logger.error(errmsg)
self.fv.error(errmsg)
def set_naxis_cb(self, w, n):
idx = int(w.get_value()) - 1
self.logger.debug("naxis %d index is %d" % (n+1, idx+1))
image = AstroImage.AstroImage(logger=self.logger)
try:
hdu = self.fits_f[self.curhdu]
data = hdu.data
self.logger.debug("HDU #%d has naxis=%s" % (
self.curhdu+1, str(data.shape)))
# invert index
m = len(data.shape) - (n+1)
self.naxispath[m] = idx
self.logger.debug("m=%d naxispath=%s" % (m, str(self.naxispath)))
image.load_hdu(hdu, naxispath=self.naxispath)
image.set(path=self.path)
self.fitsimage.set_image(image)
self.logger.debug("NAXIS%d slice %d loaded." % (n+1, idx+1))
except Exception, e:
errmsg = "Error loading NAXIS%d slice %d: %s" % (
n+1, idx+1, str(e))
self.logger.error(errmsg)
self.fv.error(errmsg)
def redo(self):
image = self.fitsimage.get_image()
md = image.get_metadata()
path = md.get('path', None)
if path == None:
self.fv.show_error("Cannot open image: no value for metadata key 'path'")
return
#print "path=%s metadata: %s" % (path, str(md))
self.path = path
self.fits_f = wcs.pyfits.open(path, 'readonly')
lower = 1
upper = len(self.fits_f)
self.num_hdu = upper
## self.w.num_hdus.set_text("%d" % self.num_hdu)
self.logger.debug("there are %d hdus" % (upper))
self.w.numhdu.set_text("%d" % (upper))
adj = self.w.hdu.get_adjustment()
adj.configure(lower, lower, upper, 1, 1, 0)
self.w.hdu.set_sensitive(upper > 1)
## self.w.hdu.clear_marks()
## self.w.hdu.add_mark(lower, gtk.POS_BOTTOM, "%d" % lower)
## self.w.hdu.add_mark(upper, gtk.POS_BOTTOM, "%d" % upper)
self.set_hdu(lower)
def __str__(self):
return 'multidim'
#END