GridBox#

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import panel as pn
pn.extension()

The GridBox is a list-like layout (unlike GridSpec) that wraps objects into a grid according to the specified nrows and ncols parameters. It has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which make it possible to interactively update and modify the layout.

Parameters:#

For layout and styling related parameters see the customization user guide.

  • ncols (int): Number of columns after which to wrap

  • nrows (int): Number of rows after which to wrap

  • objects (list): The list of objects to display in the WidgetBox. Should not generally be modified directly except when replaced in its entirety.


A GridBox layout can either be instantiated as empty and populated after the fact or using a list of objects provided as positional arguments. If the objects are not already panel components they will each be converted to one using the pn.panel conversion method. Depending on the number of items and the specified ncols/nrows the layout will reflow the content:

import random

rcolor = lambda: "#%06x" % random.randint(0, 0xFFFFFF)

box = pn.GridBox(*[pn.pane.HTML(background=rcolor(), width=50, height=50) for i in range(24)], ncols=6)
box

In general it is preferred to modify layouts only through the provided methods and avoid modifying the objects parameter directly. The one exception is when replacing the list of objects entirely, otherwise it is recommended to use the methods on the WidgetBox itself to ensure that the rendered views of the GridBox are rerendered in response to the change. As a simple example we might add an additional widget to the box using the append method:

color = pn.pane.HTML(background=rcolor(), width=50, height=50)
box[5] = color

In addition to modifying the GridBox through methods and __setitem__ syntax we can also dynamically reflow the contents by changing the ncols or nrows parameters:

box.ncols = 4

To see the effect in a statically rendered page, we will display the box a second time:

box

In general a GridBox does not have to be given a width, height or sizing_mode, allowing it to adapt to the size of its contents.

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Download this notebook from GitHub (right-click to download).