pyvista.plotting.widgets.WidgetHelper.add_box_widget

WidgetHelper.add_box_widget(

callback,

bounds=None,

factor=1.25,

rotation_enabled: bool = True,

color=None,

use_planes: bool = False,

outline_translation: bool = True,

pass_widget: bool = False,

interaction_event='end',

)

Add a box widget to the scene.

This is useless without a callback function. You can pass a callable function that takes a single argument, the PolyData box output from this widget, and performs a task with that box.

Parameters:

callbackcallable()

The method called every time the box is updated. This has two options: Take a single argument, the PolyData box (default) or if use_planes=True, then it takes a single argument of the plane collection as a vtkPlanes object.

boundstuple(float)

Length 6 tuple of the bounding box where the widget is placed.

factorfloat, optional

An inflation factor to expand on the bounds when placing.

rotation_enabledbool, optional

If False, the box widget cannot be rotated and is strictly orthogonal to the Cartesian axes.

colorColorLike, optional

Either a string, rgb sequence, or hex color string. Defaults to pyvista.global_theme.font.color.

use_planesbool, optional

Changes the arguments passed to the callback to the planes that make up the box.

outline_translationbool, optional

If False, the box widget cannot be translated and is strictly placed at the given bounds.

pass_widgetbool, optional

If True, the widget will be passed as the last argument of the callback.

interaction_eventvtk.vtkCommand.EventIds, str, optional

The VTK interaction event to use for triggering the callback. Accepts either the strings 'start', 'end', 'always' or a vtk.vtkCommand.EventIds.

Changed in version 0.38.0: Now accepts either strings or vtk.vtkCommand.EventIds.

Returns:

vtk.vtkBoxWidget

Box widget.

Examples

Shows an interactive box that is used to resize and relocate a sphere.

>>> import pyvista as pv
>>> import numpy as np
>>> plotter = pv.Plotter()
>>> def simulate(widget):
...     bounds = widget.bounds
...     new_center = np.array(
...         [
...             (bounds[0] + bounds[1]) / 2,
...             (bounds[2] + bounds[3]) / 2,
...             (bounds[4] + bounds[5]) / 2,
...         ]
...     )
...     new_radius = (
...         min(
...             (bounds[1] - bounds[0]) / 2,
...             (bounds[3] - bounds[2]) / 2,
...             (bounds[5] - bounds[4]) / 2,
...         )
...         - 0.3
...     )
...     sphere = pv.Sphere(new_radius, new_center)
...     _ = plotter.add_mesh(sphere, name="Sphere")
...
>>> _ = plotter.add_box_widget(callback=simulate)
>>> plotter.show()

Static Scene

Interactive Scene