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# Authors: Eric Larson <larson.eric.d@gmail.com>
#
# License: Simplified BSD
from contextlib import contextmanager
from ..utils import _pl
from .backends._utils import _pixmap_to_ndarray
class _MNEQtBrowserScraper:
def __repr__(self):
return '<MNEQtBrowserScraper>'
def __call__(self, block, block_vars, gallery_conf):
import mne_qt_browser
from sphinx_gallery.scrapers import figure_rst
if gallery_conf['builder_name'] != 'html':
return ''
img_fnames = list()
inst = None
n_plot = 0
for gui in list(mne_qt_browser._browser_instances):
try:
scraped = getattr(gui, '_scraped', False)
except Exception: # super __init__ not called, perhaps stale?
scraped = True
if scraped:
continue
gui._scraped = True # monkey-patch but it's easy enough
n_plot += 1
img_fnames.append(next(block_vars['image_path_iterator']))
pixmap, inst = _mne_qt_browser_screenshot(gui, inst)
pixmap.save(img_fnames[-1])
# child figures
for fig in gui.mne.child_figs:
# For now we only support Selection
if not hasattr(fig, 'channel_fig'):
continue
fig = fig.channel_fig
img_fnames.append(next(block_vars['image_path_iterator']))
fig.savefig(img_fnames[-1])
gui.close()
del gui, pixmap
if not len(img_fnames):
return ''
for _ in range(2):
inst.processEvents()
return figure_rst(
img_fnames, gallery_conf['src_dir'],
f'Raw plot{_pl(n_plot)}')
@contextmanager
def _screenshot_mode(browser):
browser.mne.toolbar.setVisible(False)
browser.statusBar().setVisible(False)
try:
yield
finally:
browser.mne.toolbar.setVisible(True)
browser.statusBar().setVisible(True)
def _mne_qt_browser_screenshot(browser, inst=None, return_type='pixmap'):
from mne_qt_browser._pg_figure import QApplication
if getattr(browser, 'load_thread', None) is not None:
if browser.load_thread.isRunning():
browser.load_thread.wait(30000)
if inst is None:
inst = QApplication.instance()
# processEvents to make sure our progressBar is updated
with _screenshot_mode(browser):
for _ in range(2):
inst.processEvents()
pixmap = browser.grab()
assert return_type in ('pixmap', 'ndarray')
if return_type == 'ndarray':
return _pixmap_to_ndarray(pixmap)
else:
return pixmap, inst
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