140 lines
6.2 KiB
Python
140 lines
6.2 KiB
Python
# -*- coding: utf-8 -*-
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# ***************************************************************************
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# * *
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# * Copyright (c) 2017 sliptonic <shopinthewoods@gmail.com> *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * This program is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Library General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with this program; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************
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import FreeCAD
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import FreeCADGui
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import PathScripts.PathLog as PathLog
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import PySide
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from PathScripts.PathGeom import PathGeom
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__title__ = "Path UI helper and utility functions"
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__author__ = "sliptonic (Brad Collette)"
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__url__ = "http://www.freecadweb.org"
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__doc__ = "A collection of helper and utility functions for the Path GUI."
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def translate(context, text, disambig=None):
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return PySide.QtCore.QCoreApplication.translate(context, text, disambig)
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if False:
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PathLog.setLevel(PathLog.Level.DEBUG, PathLog.thisModule())
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PathLog.trackModule(PathLog.thisModule())
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else:
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PathLog.setLevel(PathLog.Level.INFO, PathLog.thisModule())
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def _getProperty(obj, prop):
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o = obj
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attr = obj
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for name in prop.split('.'):
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o = attr
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if not hasattr(o, name):
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break
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attr = getattr(o, name)
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if o == attr:
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PathLog.warning(translate('PathGui', "%s has no property %s (%s))") % (obj.Label, prop, name))
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return (None, None, None)
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#PathLog.debug("found property %s of %s (%s: %s)" % (prop, obj.Label, name, attr))
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return(o, attr, name)
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def getProperty(obj, prop):
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'''getProperty(obj, prop) ... answer obj's property defined by its canonical name.'''
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o, attr, name = _getProperty(obj, prop)
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return attr
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def setProperty(obj, prop, value):
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'''setProperty(obj, prop, value) ... set the property value of obj's property defined by its canonical name.'''
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o, attr, name = _getProperty(obj, prop)
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if o and name:
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setattr(o, name, value)
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def updateInputField(obj, prop, widget, onBeforeChange=None):
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'''updateInputField(obj, prop, widget) ... update obj's property prop with the value of widget.
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The property's value is only assigned if the new value differs from the current value.
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This prevents onChanged notifications where the value didn't acutally change.
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Gui::InputField and Gui::QuantitySpinBox widgets are supported - and the property can
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be of type Quantity or Float.
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If onBeforeChange is specified it is called before a new value is assigned to the property.
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Returns True if a new value was assigned, False otherwise (new value is the same as the current).
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'''
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value = FreeCAD.Units.Quantity(widget.text()).Value
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attr = getProperty(obj, prop)
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attrValue = attr.Value if hasattr(attr, 'Value') else attr
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if not PathGeom.isRoughly(attrValue, value):
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PathLog.debug("updateInputField(%s, %s): %.2f -> %.2f" % (obj.Label, prop, attr, value))
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if onBeforeChange:
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onBeforeChange(obj)
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setProperty(obj, prop, value)
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return True
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return False
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class QuantitySpinBox:
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'''Controller class to interface a Gui::QuantitySpinBox.
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The spin box gets bound to a given property and supports update in both directions.
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QuatitySpinBox(widget, obj, prop, onBeforeChange=None)
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widget ... expected to be reference to a Gui::QuantitySpinBox
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obj ... document object
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prop ... canonical name of the (sub-) property
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onBeforeChange ... an optional callback being executed before the value of the property is changed
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'''
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def __init__(self, widget, obj, prop, onBeforeChange=None):
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self.obj = obj
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self.widget = widget
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self.prop = prop
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self.onBeforeChange = onBeforeChange
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attr = getProperty(self.obj, self.prop)
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if attr is not None:
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if hasattr(attr, 'Value'):
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widget.setProperty('unit', attr.getUserPreferred()[2])
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widget.setProperty('binding', "%s.%s" % (obj.Name, prop))
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self.valid = True
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else:
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PathLog.warning(translate('PathGui', "Cannot find property %s of %s") % (prop, obj.Label))
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self.valid = False
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def expression(self):
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'''expression() ... returns the expression if one is bound to the property'''
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if self.valid:
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return self.widget.property('expression')
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return ''
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def updateSpinBox(self, quantity=None):
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'''updateSpinBox(quantity=None) ... update the display value of the spin box.
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If no value is provided the value of the bound property is used.
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quantity can be of type Quantity or Float.'''
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if self.valid:
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if quantity is None:
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quantity = getProperty(self.obj, self.prop)
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value = quantity.Value if hasattr(quantity, 'Value') else quantity
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self.widget.setProperty('rawValue', value)
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def updateProperty(self):
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'''updateProperty() ... update the bound property with the value from the spin box'''
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if self.valid:
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return updateInputField(self.obj, self.prop, self.widget, self.onBeforeChange)
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return None
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