/usr/lib/python2.7/dist-packages/ginga/rv/plugins/PlotTable.py is in python-ginga 2.6.1-2.
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# PlotTable.py -- Table plotting plugin for Ginga reference viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
import numpy as np
from ginga.GingaPlugin import LocalPlugin
from ginga.gw import Widgets, Plot
from ginga.table.AstroTable import AstroTable
from ginga.util import plots
class PlotTable(LocalPlugin):
"""A plugin to display basic plot for any two selected columns
in a table.
"""
def __init__(self, fv, fitsimage):
# superclass defines some variables for us, like logger
super(PlotTable, self).__init__(fv, fitsimage)
self._idxname = '_idx'
# To store all active table info
self.tab = None
self.cols = []
self._idx = []
# To store selected columns names of active table
self.x_col = ''
self.y_col = ''
# Plugin preferences
prefs = self.fv.get_preferences()
self.settings = prefs.createCategory('plugin_PlotTable')
self.settings.addDefaults(linewidth=1,
linestyle='-',
linecolor='blue',
markersize=6,
markerwidth=0.5,
markerstyle='o',
markercolor='red',
show_marker=True,
x_index=1,
y_index=2,
file_suffix='.png')
self.settings.load(onError='silent')
self.gui_up = False
def build_gui(self, container):
top = Widgets.VBox()
top.set_border_width(4)
# Make the cuts plot
vbox, sw, orientation = Widgets.get_oriented_box(container)
vbox.set_margins(4, 4, 4, 4)
vbox.set_spacing(2)
msg_font = self.fv.get_font('sansFont', 12)
tw = Widgets.TextArea(wrap=True, editable=False)
tw.set_font(msg_font)
self.tw = tw
fr = Widgets.Expander('Instructions')
fr.set_widget(tw)
vbox.add_widget(fr, stretch=0)
# Add Tab Widget
nb = Widgets.TabWidget(tabpos='top')
vbox.add_widget(nb, stretch=1)
self.tab_plot = plots.Plot(logger=self.logger,
width=400, height=400)
self.plot = Plot.PlotWidget(self.tab_plot)
self.plot.resize(400, 400)
ax = self.tab_plot.add_axis()
ax.grid(True)
# Add plot to its tab
vbox_plot = Widgets.VBox()
vbox_plot.add_widget(self.plot, stretch=1)
nb.add_widget(vbox_plot, title='Plot')
captions = (('X:', 'label', 'x_combo', 'combobox'),
('Y:', 'label', 'y_combo', 'combobox'),
('Log X', 'checkbutton', 'Log Y', 'checkbutton',
'Show Marker', 'checkbutton'),
('X Low:', 'label', 'x_lo', 'entry'),
('X High:', 'label', 'x_hi', 'entry'),
('Y Low:', 'label', 'y_lo', 'entry'),
('Y High:', 'label', 'y_hi', 'entry'),
('Save', 'button'))
w, b = Widgets.build_info(captions, orientation=orientation)
self.w.update(b)
# Controls for X-axis column listing
combobox = b.x_combo
combobox.add_callback('activated', self.x_select_cb)
self.w.xcombo = combobox
combobox.set_tooltip('Select a column to plot on X-axis')
# Controls for Y-axis column listing
combobox = b.y_combo
combobox.add_callback('activated', self.y_select_cb)
self.w.ycombo = combobox
combobox.set_tooltip('Select a column to plot on Y-axis')
b.log_x.set_state(self.tab_plot.logx)
b.log_x.add_callback('activated', self.log_x_cb)
b.log_x.set_tooltip('Plot X-axis in log scale')
b.log_y.set_state(self.tab_plot.logy)
b.log_y.add_callback('activated', self.log_y_cb)
b.log_y.set_tooltip('Plot Y-axis in log scale')
b.x_lo.add_callback('activated', lambda w: self.set_xlim_cb())
b.x_lo.set_tooltip('Set X lower limit')
b.x_hi.add_callback('activated', lambda w: self.set_xlim_cb())
b.x_hi.set_tooltip('Set X upper limit')
b.y_lo.add_callback('activated', lambda w: self.set_ylim_cb())
b.y_lo.set_tooltip('Set Y lower limit')
b.y_hi.add_callback('activated', lambda w: self.set_ylim_cb())
b.y_hi.set_tooltip('Set Y upper limit')
b.show_marker.set_state(self.settings.get('show_marker', True))
b.show_marker.add_callback('activated', self.set_marker_cb)
b.show_marker.set_tooltip('Mark data points')
# Button to save plot
self.save_plot = b.save
self.save_plot.set_tooltip('Save table plot')
self.save_plot.add_callback('activated', lambda w: self.save_cb())
self.save_plot.set_enabled(False)
vbox2 = Widgets.VBox()
vbox2.add_widget(w, stretch=0)
vbox.add_widget(vbox2, stretch=0)
top.add_widget(sw, stretch=1)
btns = Widgets.HBox()
btns.set_border_width(4)
btns.set_spacing(3)
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)
container.add_widget(top, stretch=1)
self.gui_up = True
def _set_combobox(self, attrname, vals, default=0):
"""Populate combobox with given list."""
combobox = getattr(self.w, attrname)
for val in vals:
combobox.append_text(val)
if default > len(vals):
default = 0
val = vals[default]
combobox.show_text(val)
return val
def instructions(self):
self.tw.set_text("""Select columns from drop-down menus to plot. Click Save to save plot out to file.""") # noqa
def redo(self):
"""This is called when a new image arrives or the data in the
existing image changes.
"""
self.clear()
tab = self.channel.get_current_image()
if not isinstance(tab, AstroTable):
return
# Generate column indices
self.tab = tab.get_data()
self._idx = np.arange(len(self.tab))
# Populate combobox with table column names
self.cols = [self._idxname] + self.tab.colnames
self.x_col = self._set_combobox(
'xcombo', self.cols, default=self.settings.get('x_index', 1))
self.y_col = self._set_combobox(
'ycombo', self.cols, default=self.settings.get('y_index', 2))
# Automatically plot first two columns
self.plot_two_columns(reset_xlimits=True, reset_ylimits=True)
def clear(self):
"""Clear plot and combo boxes."""
self.clear_data()
self.clear_plot()
def clear_data(self):
"""Clear comboboxes and columns."""
self.tab = None
self.cols = []
self._idx = []
self.x_col = ''
self.y_col = ''
self.w.xcombo.clear()
self.w.ycombo.clear()
self.w.x_lo.set_text('')
self.w.x_hi.set_text('')
self.w.y_lo.set_text('')
self.w.y_hi.set_text('')
def clear_plot(self):
"""Clear plot display."""
self.tab_plot.clear()
self.tab_plot.draw()
self.save_plot.set_enabled(False)
def plot_two_columns(self, reset_xlimits=False, reset_ylimits=False):
"""Simple line plot for two selected columns."""
self.clear_plot()
if self.tab is None: # No table data to plot
return
plt_kw = {
'lw': self.settings.get('linewidth', 1),
'ls': self.settings.get('linestyle', '-'),
'color': self.settings.get('linecolor', 'blue'),
'ms': self.settings.get('markersize', 6),
'mew': self.settings.get('markerwidth', 0.5),
'mfc': self.settings.get('markercolor', 'red')}
plt_kw['mec'] = plt_kw['mfc']
try:
x_data, y_data, marker = self._get_plot_data()
self.tab_plot.plot(
x_data, y_data,
xtitle=self._get_label('x'), ytitle=self._get_label('y'),
marker=marker, **plt_kw)
if reset_xlimits:
self.set_ylim_cb()
self.set_xlimits_widgets()
if reset_ylimits:
self.set_xlim_cb()
self.set_ylimits_widgets()
if not (reset_xlimits or reset_ylimits):
self.set_xlim_cb(redraw=False)
self.set_ylim_cb()
except Exception as e:
self.logger.error(str(e))
else:
self.save_plot.set_enabled(True)
def set_xlimits_widgets(self, set_min=True, set_max=True):
"""Populate axis limits GUI with current plot values."""
xmin, xmax = self.tab_plot.ax.get_xlim()
if set_min:
self.w.x_lo.set_text('{0}'.format(xmin))
if set_max:
self.w.x_hi.set_text('{0}'.format(xmax))
def set_ylimits_widgets(self, set_min=True, set_max=True):
"""Populate axis limits GUI with current plot values."""
ymin, ymax = self.tab_plot.ax.get_ylim()
if set_min:
self.w.y_lo.set_text('{0}'.format(ymin))
if set_max:
self.w.y_hi.set_text('{0}'.format(ymax))
def _get_plot_data(self):
"""Extract only good data point for plotting."""
_marker_type = self.settings.get('markerstyle', 'o')
if self.x_col == self._idxname:
x_data = self._idx
else:
x_data = self.tab[self.x_col].data
if self.y_col == self._idxname:
y_data = self._idx
else:
y_data = self.tab[self.y_col].data
if self.tab.masked:
if self.x_col == self._idxname:
x_mask = np.ones_like(self._idx, dtype=np.bool)
else:
x_mask = ~self.tab[self.x_col].mask
if self.y_col == self._idxname:
y_mask = np.ones_like(self._idx, dtype=np.bool)
else:
y_mask = ~self.tab[self.y_col].mask
mask = x_mask & y_mask
x_data = x_data[mask]
y_data = y_data[mask]
if len(x_data) > 1:
i = np.argsort(x_data) # Sort X-axis to avoid messy line plot
x_data = x_data[i]
y_data = y_data[i]
if not self.w.show_marker.get_state():
_marker_type = None
return x_data, y_data, _marker_type
def _get_label(self, axis):
"""Return plot label for column for the given axis."""
if axis == 'x':
colname = self.x_col
else: # y
colname = self.y_col
if colname == self._idxname:
label = 'Index'
else:
col = self.tab[colname]
if col.unit:
label = '{0} ({1})'.format(col.name, col.unit)
else:
label = col.name
return label
def x_select_cb(self, w, index):
"""Callback to set X-axis column."""
try:
self.x_col = self.cols[index]
except IndexError as e:
self.logger.error(str(e))
else:
self.plot_two_columns(reset_xlimits=True)
def y_select_cb(self, w, index):
"""Callback to set Y-axis column."""
try:
self.y_col = self.cols[index]
except IndexError as e:
self.logger.error(str(e))
else:
self.plot_two_columns(reset_ylimits=True)
def log_x_cb(self, w, val):
"""Toggle linear/log scale for X-axis."""
self.tab_plot.logx = val
self.plot_two_columns()
def log_y_cb(self, w, val):
"""Toggle linear/log scale for Y-axis."""
self.tab_plot.logy = val
self.plot_two_columns()
def set_xlim_cb(self, redraw=True):
"""Set plot limit based on user values."""
try:
xmin = float(self.w.x_lo.get_text())
except Exception:
set_min = True
else:
set_min = False
try:
xmax = float(self.w.x_hi.get_text())
except Exception:
set_max = True
else:
set_max = False
if set_min or set_max:
self.tab_plot.draw()
self.set_xlimits_widgets(set_min=set_min, set_max=set_max)
if not (set_min and set_max):
self.tab_plot.ax.set_xlim(xmin, xmax)
if redraw:
self.tab_plot.draw()
def set_ylim_cb(self, redraw=True):
"""Set plot limit based on user values."""
try:
ymin = float(self.w.y_lo.get_text())
except Exception:
set_min = True
else:
set_min = False
try:
ymax = float(self.w.y_hi.get_text())
except Exception:
set_max = True
else:
set_max = False
if set_min or set_max:
self.tab_plot.draw()
self.set_ylimits_widgets(set_min=set_min, set_max=set_max)
if not (set_min and set_max):
self.tab_plot.ax.set_ylim(ymin, ymax)
if redraw:
self.tab_plot.draw()
def set_marker_cb(self, w, val):
"""Toggle show/hide data point markers."""
self.plot_two_columns()
def save_cb(self):
"""Save plot to file."""
# This just defines the basename.
# Extension has to be explicitly defined or things can get messy.
target = Widgets.SaveDialog(title='Save plot').get_path()
plot_ext = self.settings.get('file_suffix', '.png')
# Save cancelled
if not target:
return
if not target.endswith(plot_ext):
target += plot_ext
# TODO: This can be a user preference?
fig_dpi = 100
try:
fig = self.tab_plot.get_figure()
fig.savefig(target, dpi=fig_dpi)
except Exception as e:
self.logger.error(str(e))
else:
self.logger.info('Table plot saved as {0}'.format(target))
def start(self):
self.instructions()
self.resume()
def resume(self):
# turn off any mode user may be in
self.modes_off()
self.redo()
def close(self):
self.fv.stop_local_plugin(self.chname, str(self))
self.gui_up = False
return True
def __str__(self):
return 'plottable'
# Replace module docstring with config doc for auto insert by Sphinx.
# In the future, if we need the real docstring, we can append instead of
# overwrite.
from ginga.util.toolbox import generate_cfg_example # noqa
__doc__ = generate_cfg_example('plugin_PlotTable', package='ginga')
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