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#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This file incorporates work covered by the following license notice:
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed
# with this work for additional information regarding copyright
# ownership. The ASF licenses this file to you under the Apache
# License, Version 2.0 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.apache.org/licenses/LICENSE-2.0 .
#
import traceback
import uno
from abc import ABCMeta, abstractmethod
from com.sun.star.util import Date
from com.sun.star.util import Time
from datetime import datetime
'''
DataAware objects are used to live-synchronize UI and DataModel/DataObject.
It is used as listener on UI events, to keep the DataObject up to date.
This class, as a base abstract class, sets a frame of functionality,
delegating the data Object get/set methods to a Value object,
and leaving the UI get/set methods abstract.
Note that event listening is *not* a part of this model.
the updateData() or updateUI() methods should be programmatically called.
in child classes, the updateData() will be bound to UI event calls.
<br><br>
This class holds references to a Data Object and a Value object.
The Value object "knows" how to get and set a value from the
Data Object.
'''
class DataAware(object):
__metaclass__ = ABCMeta
'''
creates a DataAware object for the given data object and Value object.
@param dataObject_
@param value_
'''
def __init__(self, dataObject_, field_):
self._dataObject = dataObject_
self._field = field_
'''
sets the given value to the UI control
@param newValue the value to set to the ui control.
'''
@abstractmethod
def setToUI (self,newValue):
pass
'''
gets the current value from the UI control.
@return the current value from the UI control.
'''
@abstractmethod
def getFromUI (self):
pass
'''
updates the UI control according to the
current state of the data object.
'''
def updateUI(self):
try:
data = getattr(self._dataObject, self._field)
except Exception:
data = uno.invoke(self._dataObject, "get" + self._field, ())
ui = self.getFromUI()
if data is not ui:
try:
self.setToUI(data)
except Exception:
traceback.print_exc()
'''
updates the DataObject according to
the current state of the UI control.
'''
def updateData(self):
useUno = False
try:
try:
data = getattr(self._dataObject, self._field)
except Exception:
useUno = True
data = uno.invoke(self._dataObject, "get" + self._field, ())
ui = self.getFromUI()
if data is not ui:
if isinstance(ui,Date):
d = datetime(ui.Year, ui.Month, ui.Day)
ui = d.strftime('%d/%m/%y')
elif isinstance(ui,Time):
t = datetime(1, 1, 1, ui.Hours, ui.Minutes)
ui = t.strftime('%H:%M')
if useUno:
uno.invoke(self._dataObject, "set" + self._field, (ui,))
else:
if isinstance(ui,tuple):
#Listbox Element
ui = ui[0]
setattr(self._dataObject, self._field, ui)
except Exception:
traceback.print_exc()
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