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"""

============

Tool Manager

============

This example demonstrates how to:

* Modify the Toolbar

* Create tools

* Add tools

* Remove tools

Using `matplotlib.backend_managers.ToolManager`

"""

import matplotlib.pyplot as plt

plt.rcParams['toolbar'] = 'toolmanager'

from matplotlib.backend_tools import ToolBase, ToolToggleBase

class ListTools(ToolBase):

"""List all the tools controlled by the `ToolManager`."""

# keyboard shortcut

default_keymap = 'm'

description = 'List Tools'

def trigger(self, *args, **kwargs):

print('_' * 80)

print("{0:12} {1:45} {2}".format(

'Name (id)', 'Tool description', 'Keymap'))

print('-' * 80)

tools = self.toolmanager.tools

for name in sorted(tools):

if not tools[name].description:

continue

keys = ', '.join(sorted(self.toolmanager.get_tool_keymap(name)))

print("{0:12} {1:45} {2}".format(

name, tools[name].description, keys))

print('_' * 80)

print("Active Toggle tools")

print("{0:12} {1:45}".format("Group", "Active"))

print('-' * 80)

for group, active in self.toolmanager.active_toggle.items():

print("{0:12} {1:45}".format(str(group), str(active)))

class GroupHideTool(ToolToggleBase):

"""Show lines with a given gid."""

default_keymap = 'S'

description = 'Show by gid'

default_toggled = True

def __init__(self, *args, gid, **kwargs):

self.gid = gid

super().__init__(*args, **kwargs)

def enable(self, *args):

self.set_lines_visibility(True)

def disable(self, *args):

self.set_lines_visibility(False)

def set_lines_visibility(self, state):

for ax in self.figure.get_axes():

for line in ax.get_lines():

if line.get_gid() == self.gid:

line.set_visible(state)

self.figure.canvas.draw()

fig = plt.figure()

plt.plot([1, 2, 3], gid='mygroup')

plt.plot([2, 3, 4], gid='unknown')

plt.plot([3, 2, 1], gid='mygroup')

# Add the custom tools that we created

fig.canvas.manager.toolmanager.add_tool('List', ListTools)

fig.canvas.manager.toolmanager.add_tool('Show', GroupHideTool, gid='mygroup')

# Add an existing tool to new group `foo`.

# It can be added as many times as we want

fig.canvas.manager.toolbar.add_tool('zoom', 'foo')

# Remove the forward button

fig.canvas.manager.toolmanager.remove_tool('forward')

# To add a custom tool to the toolbar at specific location inside

# the navigation group

fig.canvas.manager.toolbar.add_tool('Show', 'navigation', 1)

plt.show()

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