You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
424 lines
12 KiB
Python
424 lines
12 KiB
Python
5 years ago
|
import logging
|
||
|
|
|
||
|
|
import matplotlib.cbook as cbook
|
||
|
|
import matplotlib.widgets as widgets
|
||
|
|
from matplotlib.rcsetup import validate_stringlist
|
||
|
|
import matplotlib.backend_tools as tools
|
||
|
|
|
||
|
|
_log = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
|
||
|
|
class ToolEvent:
|
||
|
|
"""Event for tool manipulation (add/remove)."""
|
||
|
|
def __init__(self, name, sender, tool, data=None):
|
||
|
|
self.name = name
|
||
|
|
self.sender = sender
|
||
|
|
self.tool = tool
|
||
|
|
self.data = data
|
||
|
|
|
||
|
|
|
||
|
|
class ToolTriggerEvent(ToolEvent):
|
||
|
|
"""Event to inform that a tool has been triggered."""
|
||
|
|
def __init__(self, name, sender, tool, canvasevent=None, data=None):
|
||
|
|
ToolEvent.__init__(self, name, sender, tool, data)
|
||
|
|
self.canvasevent = canvasevent
|
||
|
|
|
||
|
|
|
||
|
|
class ToolManagerMessageEvent:
|
||
|
|
"""
|
||
|
|
Event carrying messages from toolmanager.
|
||
|
|
|
||
|
|
Messages usually get displayed to the user by the toolbar.
|
||
|
|
"""
|
||
|
|
def __init__(self, name, sender, message):
|
||
|
|
self.name = name
|
||
|
|
self.sender = sender
|
||
|
|
self.message = message
|
||
|
|
|
||
|
|
|
||
|
|
class ToolManager:
|
||
|
|
"""
|
||
|
|
Manager for actions triggered by user interactions (key press, toolbar
|
||
|
|
clicks, ...) on a Figure.
|
||
|
|
|
||
|
|
Attributes
|
||
|
|
----------
|
||
|
|
figure : `Figure`
|
||
|
|
keypresslock : `widgets.LockDraw`
|
||
|
|
`LockDraw` object to know if the `canvas` key_press_event is locked
|
||
|
|
messagelock : `widgets.LockDraw`
|
||
|
|
`LockDraw` object to know if the message is available to write
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, figure=None):
|
||
|
|
_log.warning('Treat the new Tool classes introduced in v1.5 as '
|
||
|
|
'experimental for now, the API will likely change in '
|
||
|
|
'version 2.1 and perhaps the rcParam as well')
|
||
|
|
|
||
|
|
self._key_press_handler_id = None
|
||
|
|
|
||
|
|
self._tools = {}
|
||
|
|
self._keys = {}
|
||
|
|
self._toggled = {}
|
||
|
|
self._callbacks = cbook.CallbackRegistry()
|
||
|
|
|
||
|
|
# to process keypress event
|
||
|
|
self.keypresslock = widgets.LockDraw()
|
||
|
|
self.messagelock = widgets.LockDraw()
|
||
|
|
|
||
|
|
self._figure = None
|
||
|
|
self.set_figure(figure)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def canvas(self):
|
||
|
|
"""Canvas managed by FigureManager."""
|
||
|
|
if not self._figure:
|
||
|
|
return None
|
||
|
|
return self._figure.canvas
|
||
|
|
|
||
|
|
@property
|
||
|
|
def figure(self):
|
||
|
|
"""Figure that holds the canvas."""
|
||
|
|
return self._figure
|
||
|
|
|
||
|
|
@figure.setter
|
||
|
|
def figure(self, figure):
|
||
|
|
self.set_figure(figure)
|
||
|
|
|
||
|
|
def set_figure(self, figure, update_tools=True):
|
||
|
|
"""
|
||
|
|
Bind the given figure to the tools.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
figure : `.Figure`
|
||
|
|
update_tools : bool
|
||
|
|
Force tools to update figure
|
||
|
|
"""
|
||
|
|
if self._key_press_handler_id:
|
||
|
|
self.canvas.mpl_disconnect(self._key_press_handler_id)
|
||
|
|
self._figure = figure
|
||
|
|
if figure:
|
||
|
|
self._key_press_handler_id = self.canvas.mpl_connect(
|
||
|
|
'key_press_event', self._key_press)
|
||
|
|
if update_tools:
|
||
|
|
for tool in self._tools.values():
|
||
|
|
tool.figure = figure
|
||
|
|
|
||
|
|
def toolmanager_connect(self, s, func):
|
||
|
|
"""
|
||
|
|
Connect event with string *s* to *func*.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
s : String
|
||
|
|
Name of the event
|
||
|
|
|
||
|
|
The following events are recognized
|
||
|
|
|
||
|
|
- 'tool_message_event'
|
||
|
|
- 'tool_removed_event'
|
||
|
|
- 'tool_added_event'
|
||
|
|
|
||
|
|
For every tool added a new event is created
|
||
|
|
|
||
|
|
- 'tool_trigger_TOOLNAME`
|
||
|
|
Where TOOLNAME is the id of the tool.
|
||
|
|
|
||
|
|
func : function
|
||
|
|
Function to be called with signature
|
||
|
|
def func(event)
|
||
|
|
"""
|
||
|
|
return self._callbacks.connect(s, func)
|
||
|
|
|
||
|
|
def toolmanager_disconnect(self, cid):
|
||
|
|
"""
|
||
|
|
Disconnect callback id *cid*.
|
||
|
|
|
||
|
|
Example usage::
|
||
|
|
|
||
|
|
cid = toolmanager.toolmanager_connect('tool_trigger_zoom', onpress)
|
||
|
|
#...later
|
||
|
|
toolmanager.toolmanager_disconnect(cid)
|
||
|
|
"""
|
||
|
|
return self._callbacks.disconnect(cid)
|
||
|
|
|
||
|
|
def message_event(self, message, sender=None):
|
||
|
|
"""Emit a `ToolManagerMessageEvent`."""
|
||
|
|
if sender is None:
|
||
|
|
sender = self
|
||
|
|
|
||
|
|
s = 'tool_message_event'
|
||
|
|
event = ToolManagerMessageEvent(s, sender, message)
|
||
|
|
self._callbacks.process(s, event)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def active_toggle(self):
|
||
|
|
"""Currently toggled tools."""
|
||
|
|
return self._toggled
|
||
|
|
|
||
|
|
def get_tool_keymap(self, name):
|
||
|
|
"""
|
||
|
|
Get the keymap associated with the specified tool.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
name : str
|
||
|
|
Name of the Tool.
|
||
|
|
|
||
|
|
Returns
|
||
|
|
-------
|
||
|
|
list : list of keys associated with the Tool
|
||
|
|
"""
|
||
|
|
|
||
|
|
keys = [k for k, i in self._keys.items() if i == name]
|
||
|
|
return keys
|
||
|
|
|
||
|
|
def _remove_keys(self, name):
|
||
|
|
for k in self.get_tool_keymap(name):
|
||
|
|
del self._keys[k]
|
||
|
|
|
||
|
|
def update_keymap(self, name, *keys):
|
||
|
|
"""
|
||
|
|
Set the keymap to associate with the specified tool.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
name : str
|
||
|
|
Name of the Tool.
|
||
|
|
keys : keys to associate with the Tool
|
||
|
|
"""
|
||
|
|
|
||
|
|
if name not in self._tools:
|
||
|
|
raise KeyError('%s not in Tools' % name)
|
||
|
|
|
||
|
|
self._remove_keys(name)
|
||
|
|
|
||
|
|
for key in keys:
|
||
|
|
for k in validate_stringlist(key):
|
||
|
|
if k in self._keys:
|
||
|
|
cbook._warn_external('Key %s changed from %s to %s' %
|
||
|
|
(k, self._keys[k], name))
|
||
|
|
self._keys[k] = name
|
||
|
|
|
||
|
|
def remove_tool(self, name):
|
||
|
|
"""
|
||
|
|
Remove tool named *name*.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
name : str
|
||
|
|
Name of the Tool.
|
||
|
|
"""
|
||
|
|
|
||
|
|
tool = self.get_tool(name)
|
||
|
|
tool.destroy()
|
||
|
|
|
||
|
|
# If is a toggle tool and toggled, untoggle
|
||
|
|
if getattr(tool, 'toggled', False):
|
||
|
|
self.trigger_tool(tool, 'toolmanager')
|
||
|
|
|
||
|
|
self._remove_keys(name)
|
||
|
|
|
||
|
|
s = 'tool_removed_event'
|
||
|
|
event = ToolEvent(s, self, tool)
|
||
|
|
self._callbacks.process(s, event)
|
||
|
|
|
||
|
|
del self._tools[name]
|
||
|
|
|
||
|
|
def add_tool(self, name, tool, *args, **kwargs):
|
||
|
|
"""
|
||
|
|
Add *tool* to `ToolManager`.
|
||
|
|
|
||
|
|
If successful, adds a new event ``tool_trigger_{name}`` where
|
||
|
|
``{name}`` is the *name* of the tool; the event is fired everytime the
|
||
|
|
tool is triggered.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
name : str
|
||
|
|
Name of the tool, treated as the ID, has to be unique.
|
||
|
|
tool : class_like, i.e. str or type
|
||
|
|
Reference to find the class of the Tool to added.
|
||
|
|
|
||
|
|
Notes
|
||
|
|
-----
|
||
|
|
args and kwargs get passed directly to the tools constructor.
|
||
|
|
|
||
|
|
See Also
|
||
|
|
--------
|
||
|
|
matplotlib.backend_tools.ToolBase : The base class for tools.
|
||
|
|
"""
|
||
|
|
|
||
|
|
tool_cls = self._get_cls_to_instantiate(tool)
|
||
|
|
if not tool_cls:
|
||
|
|
raise ValueError('Impossible to find class for %s' % str(tool))
|
||
|
|
|
||
|
|
if name in self._tools:
|
||
|
|
cbook._warn_external('A "Tool class" with the same name already '
|
||
|
|
'exists, not added')
|
||
|
|
return self._tools[name]
|
||
|
|
|
||
|
|
tool_obj = tool_cls(self, name, *args, **kwargs)
|
||
|
|
self._tools[name] = tool_obj
|
||
|
|
|
||
|
|
if tool_cls.default_keymap is not None:
|
||
|
|
self.update_keymap(name, tool_cls.default_keymap)
|
||
|
|
|
||
|
|
# For toggle tools init the radio_group in self._toggled
|
||
|
|
if isinstance(tool_obj, tools.ToolToggleBase):
|
||
|
|
# None group is not mutually exclusive, a set is used to keep track
|
||
|
|
# of all toggled tools in this group
|
||
|
|
if tool_obj.radio_group is None:
|
||
|
|
self._toggled.setdefault(None, set())
|
||
|
|
else:
|
||
|
|
self._toggled.setdefault(tool_obj.radio_group, None)
|
||
|
|
|
||
|
|
# If initially toggled
|
||
|
|
if tool_obj.toggled:
|
||
|
|
self._handle_toggle(tool_obj, None, None, None)
|
||
|
|
tool_obj.set_figure(self.figure)
|
||
|
|
|
||
|
|
self._tool_added_event(tool_obj)
|
||
|
|
return tool_obj
|
||
|
|
|
||
|
|
def _tool_added_event(self, tool):
|
||
|
|
s = 'tool_added_event'
|
||
|
|
event = ToolEvent(s, self, tool)
|
||
|
|
self._callbacks.process(s, event)
|
||
|
|
|
||
|
|
def _handle_toggle(self, tool, sender, canvasevent, data):
|
||
|
|
"""
|
||
|
|
Toggle tools, need to untoggle prior to using other Toggle tool.
|
||
|
|
Called from trigger_tool.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
tool : Tool object
|
||
|
|
sender : object
|
||
|
|
Object that wishes to trigger the tool
|
||
|
|
canvasevent : Event
|
||
|
|
Original Canvas event or None
|
||
|
|
data : Object
|
||
|
|
Extra data to pass to the tool when triggering
|
||
|
|
"""
|
||
|
|
|
||
|
|
radio_group = tool.radio_group
|
||
|
|
# radio_group None is not mutually exclusive
|
||
|
|
# just keep track of toggled tools in this group
|
||
|
|
if radio_group is None:
|
||
|
|
if tool.name in self._toggled[None]:
|
||
|
|
self._toggled[None].remove(tool.name)
|
||
|
|
else:
|
||
|
|
self._toggled[None].add(tool.name)
|
||
|
|
return
|
||
|
|
|
||
|
|
# If the tool already has a toggled state, untoggle it
|
||
|
|
if self._toggled[radio_group] == tool.name:
|
||
|
|
toggled = None
|
||
|
|
# If no tool was toggled in the radio_group
|
||
|
|
# toggle it
|
||
|
|
elif self._toggled[radio_group] is None:
|
||
|
|
toggled = tool.name
|
||
|
|
# Other tool in the radio_group is toggled
|
||
|
|
else:
|
||
|
|
# Untoggle previously toggled tool
|
||
|
|
self.trigger_tool(self._toggled[radio_group],
|
||
|
|
self,
|
||
|
|
canvasevent,
|
||
|
|
data)
|
||
|
|
toggled = tool.name
|
||
|
|
|
||
|
|
# Keep track of the toggled tool in the radio_group
|
||
|
|
self._toggled[radio_group] = toggled
|
||
|
|
|
||
|
|
def _get_cls_to_instantiate(self, callback_class):
|
||
|
|
# Find the class that corresponds to the tool
|
||
|
|
if isinstance(callback_class, str):
|
||
|
|
# FIXME: make more complete searching structure
|
||
|
|
if callback_class in globals():
|
||
|
|
callback_class = globals()[callback_class]
|
||
|
|
else:
|
||
|
|
mod = 'backend_tools'
|
||
|
|
current_module = __import__(mod,
|
||
|
|
globals(), locals(), [mod], 1)
|
||
|
|
|
||
|
|
callback_class = getattr(current_module, callback_class, False)
|
||
|
|
if callable(callback_class):
|
||
|
|
return callback_class
|
||
|
|
else:
|
||
|
|
return None
|
||
|
|
|
||
|
|
def trigger_tool(self, name, sender=None, canvasevent=None, data=None):
|
||
|
|
"""
|
||
|
|
Trigger a tool and emit the ``tool_trigger_{name}`` event.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
name : str
|
||
|
|
Name of the tool.
|
||
|
|
sender : object
|
||
|
|
Object that wishes to trigger the tool
|
||
|
|
canvasevent : Event
|
||
|
|
Original Canvas event or None
|
||
|
|
data : Object
|
||
|
|
Extra data to pass to the tool when triggering
|
||
|
|
"""
|
||
|
|
tool = self.get_tool(name)
|
||
|
|
if tool is None:
|
||
|
|
return
|
||
|
|
|
||
|
|
if sender is None:
|
||
|
|
sender = self
|
||
|
|
|
||
|
|
self._trigger_tool(name, sender, canvasevent, data)
|
||
|
|
|
||
|
|
s = 'tool_trigger_%s' % name
|
||
|
|
event = ToolTriggerEvent(s, sender, tool, canvasevent, data)
|
||
|
|
self._callbacks.process(s, event)
|
||
|
|
|
||
|
|
def _trigger_tool(self, name, sender=None, canvasevent=None, data=None):
|
||
|
|
"""Actually trigger a tool."""
|
||
|
|
tool = self.get_tool(name)
|
||
|
|
|
||
|
|
if isinstance(tool, tools.ToolToggleBase):
|
||
|
|
self._handle_toggle(tool, sender, canvasevent, data)
|
||
|
|
|
||
|
|
# Important!!!
|
||
|
|
# This is where the Tool object gets triggered
|
||
|
|
tool.trigger(sender, canvasevent, data)
|
||
|
|
|
||
|
|
def _key_press(self, event):
|
||
|
|
if event.key is None or self.keypresslock.locked():
|
||
|
|
return
|
||
|
|
|
||
|
|
name = self._keys.get(event.key, None)
|
||
|
|
if name is None:
|
||
|
|
return
|
||
|
|
self.trigger_tool(name, canvasevent=event)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def tools(self):
|
||
|
|
"""A dict mapping tool name -> controlled tool."""
|
||
|
|
return self._tools
|
||
|
|
|
||
|
|
def get_tool(self, name, warn=True):
|
||
|
|
"""
|
||
|
|
Return the tool object, also accepts the actual tool for convenience.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
name : str, ToolBase
|
||
|
|
Name of the tool, or the tool itself
|
||
|
|
warn : bool, optional
|
||
|
|
If this method should give warnings.
|
||
|
|
"""
|
||
|
|
if isinstance(name, tools.ToolBase) and name.name in self._tools:
|
||
|
|
return name
|
||
|
|
if name not in self._tools:
|
||
|
|
if warn:
|
||
|
|
cbook._warn_external("ToolManager does not control tool "
|
||
|
|
"%s" % name)
|
||
|
|
return None
|
||
|
|
return self._tools[name]
|