# -*- coding: utf-8 -*-

# ***************************************************************************
# *                                                                         *
# *   Copyright (c) 2017 sliptonic <shopinthewoods@gmail.com>               *
# *                                                                         *
# *   This program is free software; you can redistribute it and/or modify  *
# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
# *   as published by the Free Software Foundation; either version 2 of     *
# *   the License, or (at your option) any later version.                   *
# *   for detail see the LICENCE text file.                                 *
# *                                                                         *
# *   This program is distributed in the hope that it will be useful,       *
# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
# *   GNU Library General Public License for more details.                  *
# *                                                                         *
# *   You should have received a copy of the GNU Library General Public     *
# *   License along with this program; if not, write to the Free Software   *
# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
# *   USA                                                                   *
# *                                                                         *
# ***************************************************************************

import FreeCAD
import FreeCADGui
import PathScripts.PathLog as PathLog
import importlib

from PathScripts.PathGeom import PathGeom
from PySide import QtCore, QtGui

__title__ = "Path UI helper and utility functions"
__author__ = "sliptonic (Brad Collette)"
__url__ = "http://www.freecadweb.org"
__doc__ = "A collection of helper and utility functions for the Path GUI."

if False:
    PathLog.setLevel(PathLog.Level.DEBUG, PathLog.thisModule())
    PathLog.trackModule(PathLog.thisModule())
else:
    PathLog.setLevel(PathLog.Level.INFO, PathLog.thisModule())

def updateInputField(obj, prop, widget, onBeforeChange = None):
    '''updateInputField(obj, prop, widget) ... helper function to update obj's property named prop with the value from widget, if it has changed.'''
    value = FreeCAD.Units.Quantity(widget.text()).Value
    attr = getattr(obj, prop)
    attrValue = attr.Value if hasattr(attr, 'Value') else attr
    if not PathGeom.isRoughly(attrValue, value):
        PathLog.debug("updateInputField(%s, %s): %.2f -> %.2f" % (obj.Label, prop, getattr(obj, prop), value))
        if onBeforeChange:
            onBeforeChange(obj)
        setattr(obj, prop, value)
        return True
    return False

class QuantitySpinBox:
    def __init__(self, widget, obj, propName, onBeforeChange=None):
        self.obj = obj
        self.widget = widget
        self.prop = propName
        self.onBeforeChange = onBeforeChange
        if hasattr(obj, propName):
            widget.setProperty('unit', getattr(self.obj, self.prop).getUserPreferred()[2])
            widget.setProperty('binding', "%s.%s" % (obj.Name, propName))
            self.valid = True
        else:
            self.valid = False

    def expression(self):
        if self.valid:
            return self.widget.property('expression')
        return False

    def updateSpinBox(self, quantity=None):
        if self.valid:
            if quantity is None:
                quantity = getattr(self.obj, self.prop)
            self.widget.setProperty('rawValue', quantity.Value)

    def updateProperty(self):
        if self.valid:
            return updateInputField(self.obj, self.prop, self.widget, self.onBeforeChange)
        return None