/usr/lib/python2.7/dist-packages/ginga/rv/plugins/Zoom.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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 | #
# Zoom.py -- Zoom plugin for Ginga reference viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
import time
from ginga.gw import Widgets, Viewers
from ginga.misc import Bunch
from ginga import GingaPlugin
class Zoom(GingaPlugin.GlobalPlugin):
def __init__(self, fv):
# superclass defines some variables for us, like logger
super(Zoom, self).__init__(fv)
self.zoomimage = None
self.default_radius = 30
self.default_zoom = 3
self.zoom_x = 0
self.zoom_y = 0
self.t_abszoom = True
self.zoomtask = fv.get_timer()
self.zoomtask.set_callback('expired', self.showzoom_timer_cb)
self.fitsimage_focus = None
self.update_time = time.time()
# read preferences for this plugin
prefs = self.fv.get_preferences()
self.settings = prefs.createCategory('plugin_Zoom')
self.settings.addDefaults(zoom_radius=self.default_radius,
zoom_amount=self.default_zoom,
zoom_cmap_name=None,
zoom_imap_name=None,
refresh_interval=0.02,
rotate_zoom_image=True)
self.settings.load(onError='silent')
self.zoom_radius = self.settings.get('zoom_radius', self.default_radius)
self.zoom_amount = self.settings.get('zoom_amount', self.default_zoom)
self.refresh_interval = self.settings.get('refresh_interval', 0.02)
self.zoom_rotate = self.settings.get('rotate_zoom_image', False)
self.copy_attrs = ['transforms', 'cutlevels', 'rotation']
if (self.settings.get('zoom_cmap_name', None) is None and
self.settings.get('zoom_imap_name', None) is None):
self.copy_attrs.append('rgbmap')
self._wd = 200
self._ht = 200
fv.add_callback('add-channel', self.add_channel)
fv.add_callback('channel-change', self.focus_cb)
def build_gui(self, container):
vbox, sw, orientation = Widgets.get_oriented_box(container,
fill=True,
scrolled=False)
vbox.set_border_width(4)
vbox.set_spacing(2)
# Uncomment to debug; passing parent logger generates too
# much noise in the main logger
#zi = Viewers.CanvasView(logger=self.logger)
zi = Viewers.CanvasView(logger=None)
zi.set_desired_size(self._wd, self._ht)
zi.enable_autozoom('off')
zi.enable_autocuts('off')
#zi.set_scale_limits(0.001, 1000.0)
zi.zoom_to(self.default_zoom)
settings = zi.get_settings()
settings.getSetting('zoomlevel').add_callback('set',
self.zoomset, zi)
zi.set_bg(0.4, 0.4, 0.4)
zi.show_pan_mark(True)
cmname = self.settings.get('zoom_cmap_name', None)
if cmname is not None:
zi.set_color_map(cmname)
imname = self.settings.get('zoom_imap_name', None)
if imname is not None:
zi.set_intensity_map(imname)
# for debugging
zi.set_name('zoomimage')
self.zoomimage = zi
bd = zi.get_bindings()
bd.enable_zoom(False)
bd.enable_pan(False)
bd.enable_cmap(False)
iw = Viewers.GingaViewerWidget(zi)
iw.resize(self._wd, self._ht)
vpaned = Widgets.Splitter(orientation=orientation)
vpaned.add_widget(iw)
vbox2 = Widgets.VBox()
captions = (("Zoom Radius:", 'label', 'Zoom Radius', 'hscale'),
("Zoom Amount:", 'label', 'Zoom Amount', 'hscale'),
)
w, b = Widgets.build_info(captions, orientation=orientation)
self.w.update(b)
vbox2.add_widget(w, stretch=0)
self.w.zoom_radius.set_limits(1, 300, incr_value=1)
self.w.zoom_radius.set_value(self.zoom_radius)
self.w.zoom_radius.add_callback('value-changed', self.set_radius_cb)
self.w.zoom_radius.set_tracking(True)
self.w.zoom_amount.set_limits(-20, 30, incr_value=1)
self.w.zoom_amount.set_value(self.zoom_amount)
self.w.zoom_amount.add_callback('value-changed', self.set_amount_cb)
self.w.zoom_amount.set_tracking(True)
captions = (("Zoom:", 'label', 'Zoom', 'label'),
("Relative Zoom", 'checkbutton'),
("Refresh Interval", 'label',
'Refresh Interval', 'spinbutton'),
("Defaults", 'button'),
)
w, b = Widgets.build_info(captions, orientation=orientation)
self.w.update(b)
b.zoom.set_text(self.fv.scale2text(zi.get_scale()))
b.relative_zoom.set_state(not self.t_abszoom)
b.relative_zoom.add_callback("activated", self.set_absrel_cb)
b.defaults.add_callback("activated", lambda w: self.set_defaults())
b.refresh_interval.set_limits(0, 200, incr_value=1)
b.refresh_interval.set_value(int(self.refresh_interval * 1000))
b.refresh_interval.add_callback('value-changed', self.set_refresh_cb)
row = Widgets.HBox()
row.add_widget(w, stretch=0)
row.add_widget(Widgets.Label(''), stretch=1)
vbox2.add_widget(row, stretch=0)
# stretch
spacer = Widgets.Label('')
vbox2.add_widget(spacer, stretch=1)
vpaned.add_widget(vbox2)
#vpaned.add_widget(Widgets.Label(''))
vbox.add_widget(vpaned, stretch=1)
#vbox.add_widget(Widgets.Label(''), stretch=1)
container.add_widget(sw, stretch=1)
def prepare(self, fitsimage):
fitssettings = fitsimage.get_settings()
zoomsettings = self.zoomimage.get_settings()
# TODO: should we add our own canvas instead?
fitsimage.add_callback('motion', self.motion_cb)
for name in ['cuts']:
fitssettings.getSetting(name).add_callback('set',
self.cutset_cb, fitsimage)
fitsimage.add_callback('transform', self.transform_cb)
fitssettings.copySettings(zoomsettings, ['rot_deg'])
fitssettings.getSetting('rot_deg').add_callback('set', self.rotate_cb, fitsimage)
fitssettings.getSetting('zoomlevel').add_callback('set',
self.zoomset_cb, fitsimage)
def add_channel(self, viewer, chinfo):
self.prepare(chinfo.fitsimage)
def start(self):
names = self.fv.get_channel_names()
for name in names:
chinfo = self.fv.get_channel(name)
self.add_channel(self.fv, chinfo)
# CALLBACKS
def update_zoomviewer(self, channel):
fitsimage = channel.fitsimage
self.fitsimage_focus = fitsimage
# Reflect transforms, colormap, etc.
fitsimage.copy_attributes(self.zoomimage, self.copy_attrs)
def redo(self, channel, image):
fitsimage = channel.fitsimage
if fitsimage != self.fv.getfocus_viewer():
return True
self.update_zoomviewer(channel)
def focus_cb(self, viewer, channel):
self.update_zoomviewer(channel)
# Match cut-levels to the ones in the "main" image
def cutset_cb(self, setting, value, fitsimage):
if fitsimage != self.fitsimage_focus:
return True
loval, hival = value
self.zoomimage.cut_levels(loval, hival)
return True
def transform_cb(self, fitsimage):
if fitsimage != self.fitsimage_focus:
return True
flip_x, flip_y, swap_xy = fitsimage.get_transforms()
self.zoomimage.transform(flip_x, flip_y, swap_xy)
return True
def rotate_cb(self, setting, deg, fitsimage):
if fitsimage != self.fitsimage_focus:
return True
if not self.zoom_rotate:
return True
self.zoomimage.rotate(deg)
return True
def _zoomset(self, fitsimage, zoomlevel):
if fitsimage != self.fitsimage_focus:
return True
if self.t_abszoom:
# Did user set to absolute zoom?
myzoomlevel = self.zoom_amount
else:
# Amount of zoom is a relative amount
myzoomlevel = zoomlevel + self.zoom_amount
self.logger.debug("zoomlevel=%d myzoom=%d" % (
zoomlevel, myzoomlevel))
self.zoomimage.zoom_to(myzoomlevel)
text = self.fv.scale2text(self.zoomimage.get_scale())
return True
def zoomset_cb(self, setting, zoomlevel, fitsimage):
"""This method is called when a main FITS widget changes zoom level.
"""
fac_x, fac_y = fitsimage.get_scale_base_xy()
fac_x_me, fac_y_me = self.zoomimage.get_scale_base_xy()
if (fac_x != fac_x_me) or (fac_y != fac_y_me):
alg = fitsimage.get_zoom_algorithm()
self.zoomimage.set_zoom_algorithm(alg)
self.zoomimage.set_scale_base_xy(fac_x, fac_y)
return self._zoomset(self.fitsimage_focus, zoomlevel)
# LOGIC
def set_radius(self, val):
self.logger.debug("Setting radius to %d" % val)
self.zoom_radius = val
fitsimage = self.fitsimage_focus
if fitsimage is None:
return True
image = fitsimage.get_image()
wd, ht = image.get_size()
data_x, data_y = wd // 2, ht // 2
self.showxy(fitsimage, data_x, data_y)
def showxy(self, fitsimage, data_x, data_y):
# Cut and show zoom image in zoom window
self.zoom_x, self.zoom_y = data_x, data_y
image = fitsimage.get_image()
if image is None:
# No image loaded into this channel
return True
# If this is a new source, then update our widget with the
# attributes of the source
if self.fitsimage_focus != fitsimage:
chname = self.fv.get_channel_name(fitsimage)
channel = self.fv.get_channel(chname)
self.focus_cb(self.fv, channel)
# If the refresh interval has expired then update the zoom image;
# otherwise (re)set the timer until the end of the interval.
cur_time = time.time()
elapsed = cur_time - self.update_time
if elapsed > self.refresh_interval:
# cancel timer
self.zoomtask.clear()
self.showzoom(image, data_x, data_y)
else:
# store needed data into the timer
self.zoomtask.data.setvals(image=image,
data_x=data_x, data_y=data_y)
# calculate delta until end of refresh interval
period = self.refresh_interval - elapsed
# set timer
self.zoomtask.cond_set(period)
return True
def motion_cb(self, fitsimage, button, data_x, data_y):
# TODO: pass _canvas_ and cut from that
self.showxy(fitsimage, data_x, data_y)
return False
def showzoom_timer_cb(self, timer):
data = timer.data
self.showzoom(data.image, data.data_x, data.data_y)
def showzoom(self, image, data_x, data_y):
# cut out detail area and set the zoom image
data, x1, y1, x2, y2 = image.cutout_radius(int(data_x), int(data_y),
self.zoom_radius)
self.update_time = time.time()
self.fv.gui_do(self.zoomimage.set_data, data)
def set_amount_cb(self, widget, val):
"""This method is called when 'Zoom Amount' control is adjusted.
"""
self.zoom_amount = val
zoomlevel = self.fitsimage_focus.get_zoom()
self._zoomset(self.fitsimage_focus, zoomlevel)
def set_absrel_cb(self, w, val):
self.t_abszoom = not val
zoomlevel = self.fitsimage_focus.get_zoom()
return self._zoomset(self.fitsimage_focus, zoomlevel)
def set_defaults(self):
self.t_abszoom = True
self.w.relative_zoom.set_state(not self.t_abszoom)
self.w.zoom_radius.set_value(self.default_radius)
self.w.zoom_amount.set_value(self.default_zoom)
self.zoomimage.zoom_to(self.default_zoom)
def zoomset(self, setting, zoomlevel, fitsimage):
text = self.fv.scale2text(self.zoomimage.get_scale())
self.w.zoom.set_text(text)
def set_radius_cb(self, w, val):
self.set_radius(val)
def set_refresh_cb(self, w, val):
self.refresh_interval = val / 1000.0
self.logger.debug("Setting refresh time to %.4f sec" % (
self.refresh_interval))
def __str__(self):
return 'zoom'
#END
|