/usr/lib/python2.7/dist-packages/ginga/rv/plugins/LineProfile.py is in python-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# LineProfile.py -- LineProfile plugin for Ginga reference viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
from ginga import GingaPlugin
from ginga.gw import Widgets, Plot
from ginga.util import plots
import numpy as np
class LineProfile(GingaPlugin.LocalPlugin):
def __init__(self, fv, fitsimage):
super(LineProfile, self).__init__(fv, fitsimage)
self.image = None
self.layertag = 'lineprofile-canvas'
self.raster_file = False
self.pan2mark = False
self.wd = None
self.ht = None
self.selected_axis = None
self.hbox_axes = None
self.dc = self.fv.get_draw_classes()
canvas = self.dc.DrawingCanvas()
canvas.set_callback('cursor-down', self.btndown_cb)
canvas.set_callback('cursor-up', self.update)
canvas.setSurface(self.fitsimage)
self.canvas = canvas
# For "marks" feature
self.mark_radius = 10
self.mark_style = 'cross'
self.mark_color = 'purple'
self.select_color = 'cyan'
self.marks = ['None']
self.mark_index = 0
self.mark_selected = None
self.tw = None
self.mark_data_x = [None]
self.mark_data_y = [None]
self.gui_up = False
def build_gui(self, container):
top = Widgets.VBox()
top.set_border_width(4)
vbox, sw, orientation = Widgets.get_oriented_box(container)
vbox.set_margins(4, 4, 4, 4)
vbox.set_spacing(2)
self.msg_font = self.fv.get_font("sansFont", 12)
tw = Widgets.TextArea(wrap=True, editable=False)
tw.set_font(self.msg_font)
self.tw = tw
fr = Widgets.Expander("Instructions")
vbox2 = Widgets.VBox()
vbox2.add_widget(tw)
vbox2.add_widget(Widgets.Label(''), stretch=1)
fr.set_widget(vbox2)
vbox.add_widget(fr, stretch=0)
self.plot = plots.Plot(logger=self.logger,
width=400, height=300)
ax = self.plot.add_axis()
ax.grid(False)
w = Plot.PlotWidget(self.plot)
w.resize(400, 300)
vbox.add_widget(w, stretch=0)
fr = Widgets.Frame("Axes controls")
self.hbox_axes = Widgets.HBox()
self.hbox_axes.set_border_width(4)
self.hbox_axes.set_spacing(1)
fr.set_widget(self.hbox_axes)
vbox.add_widget(fr, stretch=0)
btns = Widgets.HBox()
btns.set_border_width(4)
btns.set_spacing(4)
# control for selecting a mark
cbox2 = Widgets.ComboBox()
for tag in self.marks:
cbox2.append_text(tag)
if self.mark_selected is None:
cbox2.set_index(0)
else:
cbox2.show_text(self.mark_selected)
cbox2.add_callback('activated', self.mark_select_cb)
self.w.marks = cbox2
cbox2.set_tooltip("Select a mark")
btns.add_widget(cbox2, stretch=0)
btn1 = Widgets.CheckBox("Pan to mark")
btn1.set_state(self.pan2mark)
btn1.add_callback('activated', self.pan2mark_cb)
btn1.set_tooltip("Pan follows selected mark")
btns.add_widget(btn1)
btns.add_widget(Widgets.Label(''), stretch=1)
btn2 = Widgets.Button("Delete")
self.del_btn = btn2
btn2.add_callback('activated', lambda w: self.clear_mark_cb())
btn2.set_tooltip("Delete selected mark")
btn2.set_enabled(False)
btns.add_widget(btn2, stretch=0)
btn3 = Widgets.Button("Delete All")
self.del_all_btn = btn3
btn3.add_callback('activated', lambda w: self.clear_all())
btn3.set_tooltip("Clear all marks")
btn3.set_enabled(False)
btns.add_widget(btn3, stretch=0)
vbox2 = Widgets.VBox()
vbox2.add_widget(btns, stretch=0)
vbox2.add_widget(Widgets.Label(''), stretch=1)
fr = Widgets.Frame("Mark controls")
fr.set_widget(vbox2)
vbox.add_widget(fr, stretch=1)
# scroll bars will allow lots of content to be accessed
top.add_widget(sw, stretch=1)
# A button box that is always visible at the bottom
btns = Widgets.HBox()
btns.set_spacing(3)
# Add a close button for the convenience of the user
btn = Widgets.Button("Close")
btn.add_callback('activated', lambda w: self.close())
btns.add_widget(btn, stretch=0)
btns.add_widget(Widgets.Label(''), stretch=1)
top.add_widget(btns, stretch=0)
# Add our GUI to the container
container.add_widget(top, stretch=1)
self.gui_up = True
self.build_axes()
def build_axes(self):
if (not self.gui_up) or (self.hbox_axes is None):
return
self.hbox_axes.remove_all()
self.selected_axis = None
self.clear_plot()
image = self.fitsimage.get_image()
if image is not None:
# Add Checkbox widgets
# `image.naxispath` returns only mdim axes
for i in range(1, len(image.naxispath)+3):
chkbox = Widgets.CheckBox('NAXIS%d' % i)
self.hbox_axes.add_widget(chkbox)
# Disable axes for 2D images
if len(image.naxispath) <= 0:
chkbox.set_enabled(False)
else:
# Add callback
self.axes_callback_handler(chkbox, i)
def axes_callback_handler(self, chkbox, pos):
chkbox.add_callback('activated',
lambda w, tf: self.axis_toggle_cb(w, tf, pos))
def axis_toggle_cb(self, w, tf, pos):
children = self.hbox_axes.get_children()
# Deactivate previously selected axis
if self.selected_axis is not None:
children[self.selected_axis-1].set_state(False)
# Check if the old axis has been clicked
if pos == self.selected_axis:
self.selected_axis = None
self.clear_plot()
else:
self.selected_axis = pos
children[pos-1].set_state(tf)
self.redraw_mark()
def instructions(self):
self.tw.set_text("""Select an axis and pick a point using the cursor. Left-click to mark position.
Use MultiDim to change step values of axes.""")
def close(self):
self.fv.stop_local_plugin(self.chname, str(self))
self.gui_up = False
return True
def start(self):
self.instructions()
# insert layer if it is not already
try:
obj = self.fitsimage.get_object_by_tag(self.layertag)
except KeyError:
# Add canvas layer
self.fitsimage.add(self.canvas, tag=self.layertag)
self.resume()
def pause(self):
self.canvas.ui_setActive(False)
def resume(self):
self.canvas.ui_setActive(True)
self.redo()
def stop(self):
self.canvas.ui_setActive(False)
try:
self.fitsimage.delete_object_by_tag(self.layertag)
except:
pass
def redo(self):
# Get image being shown
self.image = self.fitsimage.get_image()
if self.image is None:
return
self.build_axes()
self.wd, self.ht = self.image.get_size()
self.redraw_mark()
def _plot(self, mark=None):
# Transpose array for easier slicing
mddata = self.image.get_mddata().T
naxes = mddata.ndim
if self.selected_axis:
axis_data = self.get_axis(self.selected_axis)
slice_obj = self._slice(naxes, mk=mark)
self.clear_plot()
self.plot.plot(axis_data, mddata[slice_obj])
def _slice(self, naxes, mk):
# Build N-dim slice
slice_obj = [0] * naxes
# For axes 1 and 2
if mk is not None:
slice_obj[0] = self.mark_data_x[mk]
slice_obj[1] = self.mark_data_y[mk]
# For axis > 3
for i in range(2, naxes):
slice_obj[i] = self.image.revnaxis[i-2] + 1
# Slice selected axis
slice_obj[self.selected_axis-1] = slice(None, None, None)
return slice_obj
def get_axis(self, i):
try:
header = self.image.get_header()
axis = header.get('CRVAL%d' % i) + \
np.arange(0, header.get('NAXIS%d' % i), 1) * \
header.get('CDELT%d' % i)
return axis
except Exception as e:
errmsg = "Error loading axis %d: %s" % (i, str(e))
self.logger.error(errmsg)
self.fv.error(errmsg)
def clear_plot(self):
self.plot.clear()
self.plot.fig.canvas.draw()
### MARK FEATURE LOGIC ###
def btndown_cb(self, canvas, event, data_x, data_y):
# Disable plotting for 2D images
image = self.fitsimage.get_image()
if len(image.naxispath) <= 0:
return
# Exclude points outside boundaries
if not 0 <= data_x < self.wd or not 0 <= data_y < self.ht:
self.clear_plot()
return
if not self.mark_selected:
self.mark_data_x.append(data_x)
self.mark_data_y.append(data_y)
self.add_mark(data_x, data_y)
self.del_btn.set_enabled(True)
self.del_all_btn.set_enabled(True)
return True
def update(self, canvas, event, data_x, data_y):
tag = self.mark_selected
if tag is None:
return
idx = int(tag.strip('mark'))
obj = self.canvas.get_object_by_tag(tag)
obj.move_to(data_x+5, data_y)
canvas.redraw(whence=3)
# Exclude points outside boundaries
if not 0 <= data_x < self.wd or not 0 <= data_y < self.ht:
self.clear_plot()
# Clear mark data
self.mark_data_x[idx] = None
self.mark_data_y[idx] = None
return
self.mark_data_x[idx] = data_x
self.mark_data_y[idx] = data_y
self.redraw_mark()
return True
def add_mark(self, data_x, data_y, radius=None, color=None, style=None):
if not radius:
radius = self.mark_radius
if not color:
color = self.mark_color
if not style:
style = self.mark_style
self.logger.debug("Setting mark at %d,%d" % (data_x, data_y))
self.mark_index += 1
tag = 'mark%d' % (self.mark_index)
tag = self.canvas.add(self.dc.CompoundObject(
self.dc.Point(data_x, data_y, self.mark_radius,
style=style, color=color,
linestyle='solid'),
self.dc.Text(data_x + 10, data_y, "%d" % (self.mark_index),
color=color)),
tag=tag)
self.marks.append(tag)
self.w.marks.append_text(tag)
self.select_mark(tag, pan=False)
def select_mark(self, tag, pan=True):
# deselect the current selected mark, if there is one
if self.mark_selected is not None:
try:
obj = self.canvas.get_object_by_tag(self.mark_selected)
obj.setAttrAll(color=self.mark_color)
except:
# old object may have been deleted
pass
self.mark_selected = tag
if tag is None:
self.w.marks.show_text('None')
self.canvas.redraw(whence=3)
return
self.w.marks.show_text(tag)
obj = self.canvas.get_object_by_tag(tag)
obj.setAttrAll(color=self.select_color)
if self.pan2mark and pan:
self.fitsimage.panset_xy(obj.objects[0].x, obj.objects[0].y)
self.canvas.redraw(whence=3)
self.redraw_mark()
def redraw_mark(self):
if self.mark_selected is None:
return
idx = int(self.mark_selected.strip('mark'))
self._plot(mark=idx)
def mark_select_cb(self, w, index):
tag = self.marks[index]
if index == 0:
tag = None
self.clear_plot()
self.del_btn.set_enabled(False)
else:
self.del_btn.set_enabled(True)
self.select_mark(tag)
def pan2mark_cb(self, w, val):
self.pan2mark = val
def clear_mark_cb(self):
tag = self.mark_selected
if tag is None:
return
idx = int(tag.strip('mark'))
self.canvas.delete_object_by_tag(tag)
self.w.marks.delete_alpha(tag)
self.marks.remove(tag)
self.w.marks.set_index(0)
self.mark_selected = None
self.clear_plot()
self.mark_data_x[idx] = None
self.mark_data_y[idx] = None
self.del_btn.set_enabled(False)
if len(self.marks) == 1:
self.del_all_btn.set_enabled(False)
def clear_all(self):
self.canvas.delete_all_objects()
for name in self.marks:
self.w.marks.delete_alpha(name)
self.marks = ['None']
self.w.marks.append_text('None')
self.w.marks.set_index(0)
self.mark_index = 0
self.mark_selected = None
self.mark_data_x = [None]
self.mark_data_y = [None]
self.clear_plot()
self.del_btn.set_enabled(False)
self.del_all_btn.set_enabled(False)
def __str__(self):
return 'lineprofile'
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