Plot handler#

The datalab.gui.plothandler module provides plot handlers for signal and image panels, that is, classes handling PlotPy plot items for representing signals and images.

Signal plot handler#

class datalab.gui.plothandler.SignalPlotHandler(panel: BaseDataPanel, plotwidget: PlotWidget)[source]#

Object handling signal plot items, plot dialogs, plot options

toggle_anti_aliasing(state: bool) → None[source]#

Toggle anti-aliasing

Parameters:: state – if True, enable anti-aliasing

get_plot_options() → PlotOptions[source]#: Return standard signal/image plot options

refresh_plot(what: str, update_items: bool = True, force: bool = False, only_visible: bool = True, only_existing: bool = False) → None[source]#

Refresh plot and configure datetime axis if needed.

This override adds automatic datetime axis configuration when at least one of the displayed signals has a datetime X-axis.

Parameters:

what – string describing the objects to refresh
update_items – if True, update the items
force – if True, force refresh even if auto refresh is disabled
only_visible – if True, only refresh visible items
only_existing – if True, only refresh existing items

add_shapes(oid: str, do_autoscale: bool = False) → None#: Add geometric shape items associated to computed results and annotations, for the object with the given uuid

cleanup_dataview() → None#: Clean up data view

clear() → None#: Clear plot items

get(key: str, default: TypePlotItem | None = None) → TypePlotItem | None#: Return item associated to object uuid. If the key is not found, default is returned if given, otherwise None is returned.

get_existing_oids() → list[str]#

Get existing object uuids.

Returns:: List of object uuids that have a plot item associated to them.

get_obj_from_item(item: TypePlotItem) → TypeObj | None#

Return object associated to plot item

Parameters:: item – plot item
Returns:: Object associated to plot item

reduce_shown_oids(oids: list[str]) → list[str]#

Reduce the number of shown objects to visible items only. The base implementation is to show only the first selected item if the option “Show first only” is enabled.

Parameters:: oids – list of object uuids
Returns:: Reduced list of object uuids

refresh_all_shape_items() → None#

Refresh all geometric shapes to apply new style parameters.

This method is called when shape/marker visualization settings are changed in the Settings dialog. It removes and recreates all shape items to apply the new parameters.

remove_all_shape_items() → None#: Remove all geometric shapes associated to result items

remove_item(oid: str) → None#: Remove plot item associated to object uuid

set_auto_refresh(auto_refresh: bool) → None#

Set auto refresh mode.

Parameters:: auto_refresh – if True, refresh plot items automatically

set_show_first_only(show_first_only: bool) → None#

Set show first only mode.

Parameters:: show_first_only – if True, show only the first selected item

toggle_result_label_visibility(show: bool) → None#

Toggle the visibility of all merged result labels on the plot.

Parameters:: show – True to show the labels, False to hide them

update_resultproperty_from_plot_item(item: LabelItem) → None#

Update result properties from merged label plot item.

When the merged results label is moved, update the stored position in the merged result adapter.

Parameters:: item – Merged results label item

Image plot handler#

class datalab.gui.plothandler.ImagePlotHandler(panel: BaseDataPanel, plotwidget: PlotWidget)[source]#

Object handling image plot items, plot dialogs, plot options

reduce_shown_oids(oids: list[str]) → list[str][source]#