box_edit

from bokeh.models import BoxEditTool, ColumnDataSource
from bokeh.plotting import figure, show

p = figure(x_range=(0, 10), y_range=(0, 10), width=400, height=400,
           title="Box Edit Tool")

source = ColumnDataSource(
    data=dict(
        x=[5, 2, 8],
        y=[5, 7, 8],
        width=[2, 1, 2],
        height=[2, 1, 1.5],
        color=["red", "red", "red"],
        alpha=[0.3, 0.3, 0.3],
    ),
    default_values = dict(
        color="green",
        alpha=0.5,
    ),
)

r = p.rect("x", "y", "width", "height", color="color", alpha="alpha", source=source)

draw_tool = BoxEditTool(renderers=[r], default_overrides=dict(alpha=0.8))
p.add_tools(draw_tool)
p.toolbar.active_drag = draw_tool

show(p)