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bo-graduation/venv/lib/python3.7/site-packages/matplotlib/backend_tools.py

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"""
Abstract base classes define the primitives for Tools.
These tools are used by `matplotlib.backend_managers.ToolManager`
:class:`ToolBase`
Simple stateless tool
:class:`ToolToggleBase`
Tool that has two states, only one Toggle tool can be
active at any given time for the same
`matplotlib.backend_managers.ToolManager`
"""
from enum import IntEnum
import logging
import re
import time
from types import SimpleNamespace
from weakref import WeakKeyDictionary
import numpy as np
from matplotlib import rcParams
from matplotlib._pylab_helpers import Gcf
import matplotlib.cbook as cbook
_log = logging.getLogger(__name__)
class Cursors(IntEnum): # Must subclass int for the macOS backend.
"""Backend-independent cursor types."""
HAND, POINTER, SELECT_REGION, MOVE, WAIT = range(5)
cursors = Cursors # Backcompat.
# Views positions tool
_views_positions = 'viewpos'
class ToolBase:
"""
Base tool class
A base tool, only implements `trigger` method or not method at all.
The tool is instantiated by `matplotlib.backend_managers.ToolManager`
Attributes
----------
toolmanager : `matplotlib.backend_managers.ToolManager`
ToolManager that controls this Tool
figure : `FigureCanvas`
Figure instance that is affected by this Tool
name : str
Used as **Id** of the tool, has to be unique among tools of the same
ToolManager
"""
default_keymap = None
"""
Keymap to associate with this tool
**String**: List of comma separated keys that will be used to call this
tool when the keypress event of *self.figure.canvas* is emitted
"""
description = None
"""
Description of the Tool
**String**: If the Tool is included in the Toolbar this text is used
as a Tooltip
"""
image = None
"""
Filename of the image
**String**: Filename of the image to use in the toolbar. If None, the
*name* is used as a label in the toolbar button
"""
def __init__(self, toolmanager, name):
cbook._warn_external(
'The new Tool classes introduced in v1.5 are experimental; their '
'API (including names) will likely change in future versions.')
self._name = name
self._toolmanager = toolmanager
self._figure = None
@property
def figure(self):
return self._figure
@figure.setter
def figure(self, figure):
self.set_figure(figure)
@property
def canvas(self):
if not self._figure:
return None
return self._figure.canvas
@property
def toolmanager(self):
return self._toolmanager
def _make_classic_style_pseudo_toolbar(self):
"""
Return a placeholder object with a single `canvas` attribute.
This is useful to reuse the implementations of tools already provided
by the classic Toolbars.
"""
return SimpleNamespace(canvas=self.canvas)
def set_figure(self, figure):
"""
Assign a figure to the tool
Parameters
----------
figure : `Figure`
"""
self._figure = figure
def trigger(self, sender, event, data=None):
"""
Called when this tool gets used
This method is called by
`matplotlib.backend_managers.ToolManager.trigger_tool`
Parameters
----------
event : `Event`
The Canvas event that caused this tool to be called
sender : object
Object that requested the tool to be triggered
data : object
Extra data
"""
pass
@property
def name(self):
"""Tool Id"""
return self._name
def destroy(self):
"""
Destroy the tool
This method is called when the tool is removed by
`matplotlib.backend_managers.ToolManager.remove_tool`
"""
pass
class ToolToggleBase(ToolBase):
"""
Toggleable tool
Every time it is triggered, it switches between enable and disable
Parameters
----------
``*args``
Variable length argument to be used by the Tool
``**kwargs``
`toggled` if present and True, sets the initial state of the Tool
Arbitrary keyword arguments to be consumed by the Tool
"""
radio_group = None
"""Attribute to group 'radio' like tools (mutually exclusive)
**String** that identifies the group or **None** if not belonging to a
group
"""
cursor = None
"""Cursor to use when the tool is active"""
default_toggled = False
"""Default of toggled state"""
def __init__(self, *args, **kwargs):
self._toggled = kwargs.pop('toggled', self.default_toggled)
ToolBase.__init__(self, *args, **kwargs)
def trigger(self, sender, event, data=None):
"""Calls `enable` or `disable` based on `toggled` value"""
if self._toggled:
self.disable(event)
else:
self.enable(event)
self._toggled = not self._toggled
def enable(self, event=None):
"""
Enable the toggle tool
`trigger` calls this method when `toggled` is False
"""
pass
def disable(self, event=None):
"""
Disable the toggle tool
`trigger` call this method when `toggled` is True.
This can happen in different circumstances
* Click on the toolbar tool button
* Call to `matplotlib.backend_managers.ToolManager.trigger_tool`
* Another `ToolToggleBase` derived tool is triggered
(from the same `ToolManager`)
"""
pass
@property
def toggled(self):
"""State of the toggled tool"""
return self._toggled
def set_figure(self, figure):
toggled = self.toggled
if toggled:
if self.figure:
self.trigger(self, None)
else:
# if no figure the internal state is not changed
# we change it here so next call to trigger will change it back
self._toggled = False
ToolBase.set_figure(self, figure)
if toggled:
if figure:
self.trigger(self, None)
else:
# if there is no figure, trigger won't change the internal
# state we change it back
self._toggled = True
class SetCursorBase(ToolBase):
"""
Change to the current cursor while inaxes
This tool, keeps track of all `ToolToggleBase` derived tools, and calls
set_cursor when a tool gets triggered
"""
def __init__(self, *args, **kwargs):
ToolBase.__init__(self, *args, **kwargs)
self._idDrag = None
self._cursor = None
self._default_cursor = cursors.POINTER
self._last_cursor = self._default_cursor
self.toolmanager.toolmanager_connect('tool_added_event',
self._add_tool_cbk)
# process current tools
for tool in self.toolmanager.tools.values():
self._add_tool(tool)
def set_figure(self, figure):
if self._idDrag:
self.canvas.mpl_disconnect(self._idDrag)
ToolBase.set_figure(self, figure)
if figure:
self._idDrag = self.canvas.mpl_connect(
'motion_notify_event', self._set_cursor_cbk)
def _tool_trigger_cbk(self, event):
if event.tool.toggled:
self._cursor = event.tool.cursor
else:
self._cursor = None
self._set_cursor_cbk(event.canvasevent)
def _add_tool(self, tool):
"""Set the cursor when the tool is triggered."""
if getattr(tool, 'cursor', None) is not None:
self.toolmanager.toolmanager_connect('tool_trigger_%s' % tool.name,
self._tool_trigger_cbk)
def _add_tool_cbk(self, event):
"""Process every newly added tool."""
if event.tool is self:
return
self._add_tool(event.tool)
def _set_cursor_cbk(self, event):
if not event:
return
if not getattr(event, 'inaxes', False) or not self._cursor:
if self._last_cursor != self._default_cursor:
self.set_cursor(self._default_cursor)
self._last_cursor = self._default_cursor
elif self._cursor:
cursor = self._cursor
if cursor and self._last_cursor != cursor:
self.set_cursor(cursor)
self._last_cursor = cursor
def set_cursor(self, cursor):
"""
Set the cursor
This method has to be implemented per backend
"""
raise NotImplementedError
class ToolCursorPosition(ToolBase):
"""
Send message with the current pointer position
This tool runs in the background reporting the position of the cursor
"""
def __init__(self, *args, **kwargs):
self._idDrag = None
ToolBase.__init__(self, *args, **kwargs)
def set_figure(self, figure):
if self._idDrag:
self.canvas.mpl_disconnect(self._idDrag)
ToolBase.set_figure(self, figure)
if figure:
self._idDrag = self.canvas.mpl_connect(
'motion_notify_event', self.send_message)
def send_message(self, event):
"""Call `matplotlib.backend_managers.ToolManager.message_event`"""
if self.toolmanager.messagelock.locked():
return
message = ' '
if event.inaxes and event.inaxes.get_navigate():
try:
s = event.inaxes.format_coord(event.xdata, event.ydata)
except (ValueError, OverflowError):
pass
else:
artists = [a for a in event.inaxes._mouseover_set
if a.contains(event) and a.get_visible()]
if artists:
a = cbook._topmost_artist(artists)
if a is not event.inaxes.patch:
data = a.get_cursor_data(event)
if data is not None:
data_str = a.format_cursor_data(data)
if data_str is not None:
s = s + ' ' + data_str
message = s
self.toolmanager.message_event(message, self)
class RubberbandBase(ToolBase):
"""Draw and remove rubberband"""
def trigger(self, sender, event, data):
"""Call `draw_rubberband` or `remove_rubberband` based on data"""
if not self.figure.canvas.widgetlock.available(sender):
return
if data is not None:
self.draw_rubberband(*data)
else:
self.remove_rubberband()
def draw_rubberband(self, *data):
"""
Draw rubberband
This method must get implemented per backend
"""
raise NotImplementedError
def remove_rubberband(self):
"""
Remove rubberband
This method should get implemented per backend
"""
pass
class ToolQuit(ToolBase):
"""Tool to call the figure manager destroy method"""
description = 'Quit the figure'
default_keymap = rcParams['keymap.quit']
def trigger(self, sender, event, data=None):
Gcf.destroy_fig(self.figure)
class ToolQuitAll(ToolBase):
"""Tool to call the figure manager destroy method"""
description = 'Quit all figures'
default_keymap = rcParams['keymap.quit_all']
def trigger(self, sender, event, data=None):
Gcf.destroy_all()
class ToolEnableAllNavigation(ToolBase):
"""Tool to enable all axes for toolmanager interaction"""
description = 'Enable all axes toolmanager'
default_keymap = rcParams['keymap.all_axes']
def trigger(self, sender, event, data=None):
if event.inaxes is None:
return
for a in self.figure.get_axes():
if (event.x is not None and event.y is not None
and a.in_axes(event)):
a.set_navigate(True)
class ToolEnableNavigation(ToolBase):
"""Tool to enable a specific axes for toolmanager interaction"""
description = 'Enable one axes toolmanager'
default_keymap = (1, 2, 3, 4, 5, 6, 7, 8, 9)
def trigger(self, sender, event, data=None):
if event.inaxes is None:
return
n = int(event.key) - 1
if n < len(self.figure.get_axes()):
for i, a in enumerate(self.figure.get_axes()):
if (event.x is not None and event.y is not None
and a.in_axes(event)):
a.set_navigate(i == n)
class _ToolGridBase(ToolBase):
"""Common functionality between ToolGrid and ToolMinorGrid."""
_cycle = [(False, False), (True, False), (True, True), (False, True)]
def trigger(self, sender, event, data=None):
ax = event.inaxes
if ax is None:
return
try:
x_state, x_which, y_state, y_which = self._get_next_grid_states(ax)
except ValueError:
pass
else:
ax.grid(x_state, which=x_which, axis="x")
ax.grid(y_state, which=y_which, axis="y")
ax.figure.canvas.draw_idle()
@staticmethod
def _get_uniform_grid_state(ticks):
"""
Check whether all grid lines are in the same visibility state.
Returns True/False if all grid lines are on or off, None if they are
not all in the same state.
"""
if all(tick.gridline.get_visible() for tick in ticks):
return True
elif not any(tick.gridline.get_visible() for tick in ticks):
return False
else:
return None
class ToolGrid(_ToolGridBase):
"""Tool to toggle the major grids of the figure"""
description = 'Toggle major grids'
default_keymap = rcParams['keymap.grid']
def _get_next_grid_states(self, ax):
if None in map(self._get_uniform_grid_state,
[ax.xaxis.minorTicks, ax.yaxis.minorTicks]):
# Bail out if minor grids are not in a uniform state.
raise ValueError
x_state, y_state = map(self._get_uniform_grid_state,
[ax.xaxis.majorTicks, ax.yaxis.majorTicks])
cycle = self._cycle
# Bail out (via ValueError) if major grids are not in a uniform state.
x_state, y_state = (
cycle[(cycle.index((x_state, y_state)) + 1) % len(cycle)])
return (x_state, "major" if x_state else "both",
y_state, "major" if y_state else "both")
class ToolMinorGrid(_ToolGridBase):
"""Tool to toggle the major and minor grids of the figure"""
description = 'Toggle major and minor grids'
default_keymap = rcParams['keymap.grid_minor']
def _get_next_grid_states(self, ax):
if None in map(self._get_uniform_grid_state,
[ax.xaxis.majorTicks, ax.yaxis.majorTicks]):
# Bail out if major grids are not in a uniform state.
raise ValueError
x_state, y_state = map(self._get_uniform_grid_state,
[ax.xaxis.minorTicks, ax.yaxis.minorTicks])
cycle = self._cycle
# Bail out (via ValueError) if minor grids are not in a uniform state.
x_state, y_state = (
cycle[(cycle.index((x_state, y_state)) + 1) % len(cycle)])
return x_state, "both", y_state, "both"
class ToolFullScreen(ToolToggleBase):
"""Tool to toggle full screen"""
description = 'Toggle fullscreen mode'
default_keymap = rcParams['keymap.fullscreen']
def enable(self, event):
self.figure.canvas.manager.full_screen_toggle()
def disable(self, event):
self.figure.canvas.manager.full_screen_toggle()
class AxisScaleBase(ToolToggleBase):
"""Base Tool to toggle between linear and logarithmic"""
def trigger(self, sender, event, data=None):
if event.inaxes is None:
return
ToolToggleBase.trigger(self, sender, event, data)
def enable(self, event):
self.set_scale(event.inaxes, 'log')
self.figure.canvas.draw_idle()
def disable(self, event):
self.set_scale(event.inaxes, 'linear')
self.figure.canvas.draw_idle()
class ToolYScale(AxisScaleBase):
"""Tool to toggle between linear and logarithmic scales on the Y axis"""
description = 'Toggle scale Y axis'
default_keymap = rcParams['keymap.yscale']
def set_scale(self, ax, scale):
ax.set_yscale(scale)
class ToolXScale(AxisScaleBase):
"""Tool to toggle between linear and logarithmic scales on the X axis"""
description = 'Toggle scale X axis'
default_keymap = rcParams['keymap.xscale']
def set_scale(self, ax, scale):
ax.set_xscale(scale)
class ToolViewsPositions(ToolBase):
"""
Auxiliary Tool to handle changes in views and positions
Runs in the background and should get used by all the tools that
need to access the figure's history of views and positions, e.g.
* `ToolZoom`
* `ToolPan`
* `ToolHome`
* `ToolBack`
* `ToolForward`
"""
def __init__(self, *args, **kwargs):
self.views = WeakKeyDictionary()
self.positions = WeakKeyDictionary()
self.home_views = WeakKeyDictionary()
ToolBase.__init__(self, *args, **kwargs)
def add_figure(self, figure):
"""Add the current figure to the stack of views and positions"""
if figure not in self.views:
self.views[figure] = cbook.Stack()
self.positions[figure] = cbook.Stack()
self.home_views[figure] = WeakKeyDictionary()
# Define Home
self.push_current(figure)
# Make sure we add a home view for new axes as they're added
figure.add_axobserver(lambda fig: self.update_home_views(fig))
def clear(self, figure):
"""Reset the axes stack"""
if figure in self.views:
self.views[figure].clear()
self.positions[figure].clear()
self.home_views[figure].clear()
self.update_home_views()
def update_view(self):
"""
Update the view limits and position for each axes from the current
stack position. If any axes are present in the figure that aren't in
the current stack position, use the home view limits for those axes and
don't update *any* positions.
"""
views = self.views[self.figure]()
if views is None:
return
pos = self.positions[self.figure]()
if pos is None:
return
home_views = self.home_views[self.figure]
all_axes = self.figure.get_axes()
for a in all_axes:
if a in views:
cur_view = views[a]
else:
cur_view = home_views[a]
a._set_view(cur_view)
if set(all_axes).issubset(pos):
for a in all_axes:
# Restore both the original and modified positions
a._set_position(pos[a][0], 'original')
a._set_position(pos[a][1], 'active')
self.figure.canvas.draw_idle()
def push_current(self, figure=None):
"""
Push the current view limits and position onto their respective stacks
"""
if not figure:
figure = self.figure
views = WeakKeyDictionary()
pos = WeakKeyDictionary()
for a in figure.get_axes():
views[a] = a._get_view()
pos[a] = self._axes_pos(a)
self.views[figure].push(views)
self.positions[figure].push(pos)
def _axes_pos(self, ax):
"""
Return the original and modified positions for the specified axes
Parameters
----------
ax : (matplotlib.axes.AxesSubplot)
The axes to get the positions for
Returns
-------
limits : (tuple)
A tuple of the original and modified positions
"""
return (ax.get_position(True).frozen(),
ax.get_position().frozen())
def update_home_views(self, figure=None):
"""
Make sure that self.home_views has an entry for all axes present in the
figure
"""
if not figure:
figure = self.figure
for a in figure.get_axes():
if a not in self.home_views[figure]:
self.home_views[figure][a] = a._get_view()
def refresh_locators(self):
"""Redraw the canvases, update the locators"""
for a in self.figure.get_axes():
xaxis = getattr(a, 'xaxis', None)
yaxis = getattr(a, 'yaxis', None)
zaxis = getattr(a, 'zaxis', None)
locators = []
if xaxis is not None:
locators.append(xaxis.get_major_locator())
locators.append(xaxis.get_minor_locator())
if yaxis is not None:
locators.append(yaxis.get_major_locator())
locators.append(yaxis.get_minor_locator())
if zaxis is not None:
locators.append(zaxis.get_major_locator())
locators.append(zaxis.get_minor_locator())
for loc in locators:
loc.refresh()
self.figure.canvas.draw_idle()
def home(self):
"""Recall the first view and position from the stack"""
self.views[self.figure].home()
self.positions[self.figure].home()
def back(self):
"""Back one step in the stack of views and positions"""
self.views[self.figure].back()
self.positions[self.figure].back()
def forward(self):
"""Forward one step in the stack of views and positions"""
self.views[self.figure].forward()
self.positions[self.figure].forward()
class ViewsPositionsBase(ToolBase):
"""Base class for `ToolHome`, `ToolBack` and `ToolForward`"""
_on_trigger = None
def trigger(self, sender, event, data=None):
self.toolmanager.get_tool(_views_positions).add_figure(self.figure)
getattr(self.toolmanager.get_tool(_views_positions),
self._on_trigger)()
self.toolmanager.get_tool(_views_positions).update_view()
class ToolHome(ViewsPositionsBase):
"""Restore the original view lim"""
description = 'Reset original view'
image = 'home'
default_keymap = rcParams['keymap.home']
_on_trigger = 'home'
class ToolBack(ViewsPositionsBase):
"""Move back up the view lim stack"""
description = 'Back to previous view'
image = 'back'
default_keymap = rcParams['keymap.back']
_on_trigger = 'back'
class ToolForward(ViewsPositionsBase):
"""Move forward in the view lim stack"""
description = 'Forward to next view'
image = 'forward'
default_keymap = rcParams['keymap.forward']
_on_trigger = 'forward'
class ConfigureSubplotsBase(ToolBase):
"""Base tool for the configuration of subplots"""
description = 'Configure subplots'
image = 'subplots'
class SaveFigureBase(ToolBase):
"""Base tool for figure saving"""
description = 'Save the figure'
image = 'filesave'
default_keymap = rcParams['keymap.save']
class ZoomPanBase(ToolToggleBase):
"""Base class for `ToolZoom` and `ToolPan`"""
def __init__(self, *args):
ToolToggleBase.__init__(self, *args)
self._button_pressed = None
self._xypress = None
self._idPress = None
self._idRelease = None
self._idScroll = None
self.base_scale = 2.
self.scrollthresh = .5 # .5 second scroll threshold
self.lastscroll = time.time()-self.scrollthresh
def enable(self, event):
"""Connect press/release events and lock the canvas"""
self.figure.canvas.widgetlock(self)
self._idPress = self.figure.canvas.mpl_connect(
'button_press_event', self._press)
self._idRelease = self.figure.canvas.mpl_connect(
'button_release_event', self._release)
self._idScroll = self.figure.canvas.mpl_connect(
'scroll_event', self.scroll_zoom)
def disable(self, event):
"""Release the canvas and disconnect press/release events"""
self._cancel_action()
self.figure.canvas.widgetlock.release(self)
self.figure.canvas.mpl_disconnect(self._idPress)
self.figure.canvas.mpl_disconnect(self._idRelease)
self.figure.canvas.mpl_disconnect(self._idScroll)
def trigger(self, sender, event, data=None):
self.toolmanager.get_tool(_views_positions).add_figure(self.figure)
ToolToggleBase.trigger(self, sender, event, data)
def scroll_zoom(self, event):
# https://gist.github.com/tacaswell/3144287
if event.inaxes is None:
return
if event.button == 'up':
# deal with zoom in
scl = self.base_scale
elif event.button == 'down':
# deal with zoom out
scl = 1/self.base_scale
else:
# deal with something that should never happen
scl = 1
ax = event.inaxes
ax._set_view_from_bbox([event.x, event.y, scl])
# If last scroll was done within the timing threshold, delete the
# previous view
if (time.time()-self.lastscroll) < self.scrollthresh:
self.toolmanager.get_tool(_views_positions).back()
self.figure.canvas.draw_idle() # force re-draw
self.lastscroll = time.time()
self.toolmanager.get_tool(_views_positions).push_current()
class ToolZoom(ZoomPanBase):
"""Zoom to rectangle"""
description = 'Zoom to rectangle'
image = 'zoom_to_rect'
default_keymap = rcParams['keymap.zoom']
cursor = cursors.SELECT_REGION
radio_group = 'default'
def __init__(self, *args):
ZoomPanBase.__init__(self, *args)
self._ids_zoom = []
def _cancel_action(self):
for zoom_id in self._ids_zoom:
self.figure.canvas.mpl_disconnect(zoom_id)
self.toolmanager.trigger_tool('rubberband', self)
self.toolmanager.get_tool(_views_positions).refresh_locators()
self._xypress = None
self._button_pressed = None
self._ids_zoom = []
return
def _press(self, event):
"""Callback for mouse button presses in zoom-to-rectangle mode."""
# If we're already in the middle of a zoom, pressing another
# button works to "cancel"
if self._ids_zoom != []:
self._cancel_action()
if event.button == 1:
self._button_pressed = 1
elif event.button == 3:
self._button_pressed = 3
else:
self._cancel_action()
return
x, y = event.x, event.y
self._xypress = []
for i, a in enumerate(self.figure.get_axes()):
if (x is not None and y is not None and a.in_axes(event) and
a.get_navigate() and a.can_zoom()):
self._xypress.append((x, y, a, i, a._get_view()))
id1 = self.figure.canvas.mpl_connect(
'motion_notify_event', self._mouse_move)
id2 = self.figure.canvas.mpl_connect(
'key_press_event', self._switch_on_zoom_mode)
id3 = self.figure.canvas.mpl_connect(
'key_release_event', self._switch_off_zoom_mode)
self._ids_zoom = id1, id2, id3
self._zoom_mode = event.key
def _switch_on_zoom_mode(self, event):
self._zoom_mode = event.key
self._mouse_move(event)
def _switch_off_zoom_mode(self, event):
self._zoom_mode = None
self._mouse_move(event)
def _mouse_move(self, event):
"""Callback for mouse moves in zoom-to-rectangle mode."""
if self._xypress:
x, y = event.x, event.y
lastx, lasty, a, ind, view = self._xypress[0]
(x1, y1), (x2, y2) = np.clip(
[[lastx, lasty], [x, y]], a.bbox.min, a.bbox.max)
if self._zoom_mode == "x":
y1, y2 = a.bbox.intervaly
elif self._zoom_mode == "y":
x1, x2 = a.bbox.intervalx
self.toolmanager.trigger_tool(
'rubberband', self, data=(x1, y1, x2, y2))
def _release(self, event):
"""Callback for mouse button releases in zoom-to-rectangle mode."""
for zoom_id in self._ids_zoom:
self.figure.canvas.mpl_disconnect(zoom_id)
self._ids_zoom = []
if not self._xypress:
self._cancel_action()
return
last_a = []
for cur_xypress in self._xypress:
x, y = event.x, event.y
lastx, lasty, a, _ind, view = cur_xypress
# ignore singular clicks - 5 pixels is a threshold
if abs(x - lastx) < 5 or abs(y - lasty) < 5:
self._cancel_action()
return
# detect twinx, twiny axes and avoid double zooming
twinx, twiny = False, False
if last_a:
for la in last_a:
if a.get_shared_x_axes().joined(a, la):
twinx = True
if a.get_shared_y_axes().joined(a, la):
twiny = True
last_a.append(a)
if self._button_pressed == 1:
direction = 'in'
elif self._button_pressed == 3:
direction = 'out'
else:
continue
a._set_view_from_bbox((lastx, lasty, x, y), direction,
self._zoom_mode, twinx, twiny)
self._zoom_mode = None
self.toolmanager.get_tool(_views_positions).push_current()
self._cancel_action()
class ToolPan(ZoomPanBase):
"""Pan axes with left mouse, zoom with right"""
default_keymap = rcParams['keymap.pan']
description = 'Pan axes with left mouse, zoom with right'
image = 'move'
cursor = cursors.MOVE
radio_group = 'default'
def __init__(self, *args):
ZoomPanBase.__init__(self, *args)
self._idDrag = None
def _cancel_action(self):
self._button_pressed = None
self._xypress = []
self.figure.canvas.mpl_disconnect(self._idDrag)
self.toolmanager.messagelock.release(self)
self.toolmanager.get_tool(_views_positions).refresh_locators()
def _press(self, event):
if event.button == 1:
self._button_pressed = 1
elif event.button == 3:
self._button_pressed = 3
else:
self._cancel_action()
return
x, y = event.x, event.y
self._xypress = []
for i, a in enumerate(self.figure.get_axes()):
if (x is not None and y is not None and a.in_axes(event) and
a.get_navigate() and a.can_pan()):
a.start_pan(x, y, event.button)
self._xypress.append((a, i))
self.toolmanager.messagelock(self)
self._idDrag = self.figure.canvas.mpl_connect(
'motion_notify_event', self._mouse_move)
def _release(self, event):
if self._button_pressed is None:
self._cancel_action()
return
self.figure.canvas.mpl_disconnect(self._idDrag)
self.toolmanager.messagelock.release(self)
for a, _ind in self._xypress:
a.end_pan()
if not self._xypress:
self._cancel_action()
return
self.toolmanager.get_tool(_views_positions).push_current()
self._cancel_action()
def _mouse_move(self, event):
for a, _ind in self._xypress:
# safer to use the recorded button at the _press than current
# button: # multiple button can get pressed during motion...
a.drag_pan(self._button_pressed, event.key, event.x, event.y)
self.toolmanager.canvas.draw_idle()
class ToolHelpBase(ToolBase):
description = 'Print tool list, shortcuts and description'
default_keymap = rcParams['keymap.help']
image = 'help.png'
@staticmethod
def format_shortcut(key_sequence):
"""
Converts a shortcut string from the notation used in rc config to the
standard notation for displaying shortcuts, e.g. 'ctrl+a' -> 'Ctrl+A'.
"""
return (key_sequence if len(key_sequence) == 1 else
re.sub(r"\+[A-Z]", r"+Shift\g<0>", key_sequence).title())
def _format_tool_keymap(self, name):
keymaps = self.toolmanager.get_tool_keymap(name)
return ", ".join(self.format_shortcut(keymap) for keymap in keymaps)
def _get_help_entries(self):
return [(name, self._format_tool_keymap(name), tool.description)
for name, tool in sorted(self.toolmanager.tools.items())
if tool.description]
def _get_help_text(self):
entries = self._get_help_entries()
entries = ["{}: {}\n\t{}".format(*entry) for entry in entries]
return "\n".join(entries)
def _get_help_html(self):
fmt = "<tr><td>{}</td><td>{}</td><td>{}</td></tr>"
rows = [fmt.format(
"<b>Action</b>", "<b>Shortcuts</b>", "<b>Description</b>")]
rows += [fmt.format(*row) for row in self._get_help_entries()]
return ("<style>td {padding: 0px 4px}</style>"
"<table><thead>" + rows[0] + "</thead>"
"<tbody>".join(rows[1:]) + "</tbody></table>")
class ToolCopyToClipboardBase(ToolBase):
"""Tool to copy the figure to the clipboard"""
description = 'Copy the canvas figure to clipboard'
default_keymap = rcParams['keymap.copy']
def trigger(self, *args, **kwargs):
message = "Copy tool is not available"
self.toolmanager.message_event(message, self)
default_tools = {'home': ToolHome, 'back': ToolBack, 'forward': ToolForward,
'zoom': ToolZoom, 'pan': ToolPan,
'subplots': 'ToolConfigureSubplots',
'save': 'ToolSaveFigure',
'grid': ToolGrid,
'grid_minor': ToolMinorGrid,
'fullscreen': ToolFullScreen,
'quit': ToolQuit,
'quit_all': ToolQuitAll,
'allnav': ToolEnableAllNavigation,
'nav': ToolEnableNavigation,
'xscale': ToolXScale,
'yscale': ToolYScale,
'position': ToolCursorPosition,
_views_positions: ToolViewsPositions,
'cursor': 'ToolSetCursor',
'rubberband': 'ToolRubberband',
'help': 'ToolHelp',
'copy': 'ToolCopyToClipboard',
}
"""Default tools"""
default_toolbar_tools = [['navigation', ['home', 'back', 'forward']],
['zoompan', ['pan', 'zoom', 'subplots']],
['io', ['save', 'help']]]
"""Default tools in the toolbar"""
def add_tools_to_manager(toolmanager, tools=default_tools):
"""
Add multiple tools to `ToolManager`
Parameters
----------
toolmanager : ToolManager
`backend_managers.ToolManager` object that will get the tools added
tools : {str: class_like}, optional
The tools to add in a {name: tool} dict, see `add_tool` for more
info.
"""
for name, tool in tools.items():
toolmanager.add_tool(name, tool)
def add_tools_to_container(container, tools=default_toolbar_tools):
"""
Add multiple tools to the container.
Parameters
----------
container : Container
`backend_bases.ToolContainerBase` object that will get the tools added
tools : list, optional
List in the form
[[group1, [tool1, tool2 ...]], [group2, [...]]]
Where the tools given by tool1, and tool2 will display in group1.
See `add_tool` for details.
"""
for group, grouptools in tools:
for position, tool in enumerate(grouptools):
container.add_tool(tool, group, position)