Source code for qtpyvcp.actions

import os
import sys
from qtpy.QtWidgets import QAction, QPushButton, QCheckBox, QSlider, QSpinBox, QComboBox, QDial

import machine_actions as machine
import program_actions as program
import spindle_actions as spindle
import coolant_actions as coolant
import tool_actions as tool

# Set up logging
from qtpyvcp.utilities import logger
LOG = logger.getLogger(__name__)

IN_DESIGNER = os.getenv('DESIGNER', False)

[docs]class InvalidAction(Exception): pass
[docs]def bindWidget(widget, action): """Binds a widget to an action. Args: widget (QWidget) : The widget to bind the action too. Typically `widget` is a QPushButton, QCheckBox, QComboBox, QSlider or QAction instance. action (str) : The string identifier of the action to bind the widget to, in the format ``action_class.action_name:arg1, arg2 ...``. Example: A QPushButton or QCheckBox would typically be bound to an action that does not take an argument, for example ``machine.power.toggle``:: bindWidget(widget, 'machine.power.toggle') But it is possible to specify an argument by appending an ':' followed by the argument value. For example we can bind a QPushButton so that it homes the X axis when the button is pressed:: bindWidget(widget, 'machine.home.axis:x') Widgets such as QSliders and QComboBoxs that have a value associated with them can also be bound to a action, and the value will automatically be passed to the action. For example we can bind a QSLider to the ``spindle.0.override`` action:: bindWidget(widget, 'spindle.0.override') """ action, sep, args = str(action).partition(':') action = action.replace('-', '_') kwargs = {} prev_item = '' method = sys.modules[__name__] for item in action.split('.'): if item.isdigit(): kwargs[prev_item] = int(item) continue try: method = getattr(method, item) except(AttributeError, KeyError): if IN_DESIGNER: return else: raise InvalidAction("Could not get action method: %s" % item) prev_item = item if method is None or not callable(method): if IN_DESIGNER: return else: raise InvalidAction('Method is not callable: %s' % method) if args != '': # make a list out of comma separated args args = args.replace(' ', '').split(',') # convert numbers to int and unicode to str args = [int(arg) if arg.isdigit() else str(arg) for arg in args] if isinstance(widget, QAction): widget.triggered.connect(lambda: method(*args, **kwargs)) # should be able to do widget.triggered[()] # if it is a toggle action make the menu item checkable if action.endswith('toggle'): widget.setCheckable(True) elif isinstance(widget, QPushButton) or isinstance(widget, QCheckBox): if action.startswith('machine.jog.axis'): widget.pressed.connect(lambda: method(*args, **kwargs)) widget.released.connect(lambda: method(*args, speed=0, **kwargs)) else: widget.clicked.connect(lambda: method(*args, **kwargs)) elif isinstance(widget, QSlider) or isinstance(widget, QSpinBox) or isinstance(widget, QDial): widget.valueChanged.connect(method) elif isinstance(widget, QComboBox): widget.activated[str].connect(method) else: raise InvalidAction('Can\'t bind action "{}" to unsupported widget type "{}"' .format(action, widget.__class__.__name__)) try: # Set the initial widget OK state and update on changes method.ok(*args, widget=widget, **kwargs) method.bindOk(*args, widget=widget, **kwargs) except Exception as e: msg = "%s raised while trying to bind '%s' action to '%s'" % \ (e.message, action, widget) raise InvalidAction, msg, sys.exc_info()[2]