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"""
.. _slider_bar_widget_example:
Slider Bar Widget
~~~~~~~~~~~~~~~~~
The slider widget can be enabled and disabled by the
:func:`pyvista.Plotter.add_slider_widget` and
:func:`pyvista.Plotter.clear_slider_widgets` methods respectively.
This is one of the most versatile widgets as it can control a value that can
be used for just about anything.
"""
# sphinx_gallery_start_ignore
# widgets do not work in interactive examples
from __future__ import annotations
PYVISTA_GALLERY_FORCE_STATIC_IN_DOCUMENT = True
# sphinx_gallery_end_ignore
# sphinx_gallery_thumbnail_number = 1
##############################################################################
# One helper method we've added is the
# :func:`pyvista.Plotter.add_mesh_threshold` method which leverages the
# slider widget to control a thresholding value.
import pyvista as pv
from pyvista import examples
mesh = examples.download_knee_full()
p = pv.Plotter()
p.add_mesh_threshold(mesh)
p.show()
# %%
# After interacting with the scene, the threshold mesh is available as:
p.threshold_meshes
##############################################################################
# And here is a screen capture of a user interacting with this
#
# .. image:: ../../images/gifs/slider-widget-threshold.gif
# %%
# Custom Callback
# +++++++++++++++
#
# Or you could leverage a custom callback function that takes a single value
# from the slider as its argument to do something like control the resolution
# of a mesh. Again note the use of the ``name`` argument in ``add_mesh``:
p = pv.Plotter()
def create_mesh(value):
res = int(value)
sphere = pv.Sphere(phi_resolution=res, theta_resolution=res)
p.add_mesh(sphere, name='sphere', show_edges=True)
p.add_slider_widget(create_mesh, [5, 100], title='Resolution')
p.show()
##############################################################################
# And here is a screen capture of a user interacting with this
#
# .. image:: ../../images/gifs/slider-widget-resolution.gif
|
