def _update_slice_graphs(self, event=None):
if event is None:
return
x, y = plotutils.mouse_event_to_coordinates(self._overview, event)
if not x:
return
x, y = int(x), int(y)
if x < 0 or x >= self._data.shape[0] \
or y < 0 or y >= self._data.shape[1]:
return
self._vertical_curve.setData(y=self._data[x, ...])
self._horizontal_curve.setData(y=self._data[..., y])
def _update_cursor_info(self, event=None):
x, y, value = float('nan'), float('nan'), float('nan')
if event:
x, y = plotutils.mouse_event_to_coordinates(self._overview, event)
if not x:
return
x, y = int(x), int(y)
if x >= 0 and x < self._data.shape[0] \
and y >= 0 and y < self._data.shape[1]:
value = self._data[x, y]
legend = ['x = {0}'.format(x), 'y = {0}'.format(y),
'value = {0:.5g}'.format(value)]
self._info.update_entry(_CURSOR_GROUP, '<br/>'.join(legend))
def _update_values_info(self, event=None):
"""Update info text on mouse move event.
Uses proxy to reduce number of events.
"""
if event:
x, y = plotutils.mouse_event_to_coordinates(self._plot, event)
if not x:
return
values = [plotutils.get_data_item_value(di, x)
for di in self._plot.listDataItems()]
else:
values = len(self._plot.listDataItems())*[float('nan')]
self._update_info(_VALUE_GROUP, values)