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#!/usr/bin/env python3
# qtvcp
#
# Copyright (c) 2018 Chris Morley <chrisinnanaimo@hotmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# 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 General Public License for more details.
#
#################################################################################
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QStackedWidget, QLayout
from collections import OrderedDict
from qtvcp.widgets.widget_baseclass import _HalWidgetBase
from qtvcp import logger
# Instantiate the libraries with global reference
# LOG is for running code logging
LOG = logger.getLogger(__name__)
# Force the log level for this module
# LOG.setLevel(logger.INFO) # One of DEBUG, INFO, WARNING, ERROR, CRITICAL
class WidgetSwitcher(QStackedWidget, _HalWidgetBase):
widgetChanged = pyqtSignal(int)
def __init__(self, parent=None):
super(WidgetSwitcher, self).__init__(parent)
self._widgetNames = OrderedDict()
self._current_object = None
self._current_number = 0
# do this now so we have a reference to all the widets
# through QTVCP_INSTANCE
def _hal_init(self):
wlist = self.property("widget_list")
if wlist is None:
LOG.warning('No widget names found for switching.')
else:
for i in wlist:
LOG.debug('Widget specified in list: {}'.format(i))
self.register_widget(i, self.QTVCP_INSTANCE_)
# check for enough pages - need one for default and one for each widget.
total = len(self._widgetNames)
count = self.count()
if count < total +1:
LOG.error('Not enough pages for widget total +1, widget count = {} page count = {}'.format(total,count))
# add the widget info so switcher will know what to switch
# makes a list of: widget object, widget's layout, position in the layout
def register_widget(self, name, object):
layout, position = self.search(object[name])
self._widgetNames[name] = [object[name], layout, position]
LOG.debug( 'registering: {} {} {}'.format(name,layout,position))
# find the layout and position that the widget is in
def search(self, widget):
for i in widget.parent().findChildren(QLayout):
if i.indexOf(widget) > -1:
#print i.layout(), widget.objectName(), i.objectName()
return i.layout(), i.indexOf(widget)
print(widget.parent())
LOG.error('No layout found for {}'.format(widget))
return widget.parent(),None
# Show the widgets based on a reference number
# -1 will return to default layout
def show_id_widget(self, number):
#print 'requested:',number
if number == 0:
self.show_default()
return
for n, i in enumerate(self._widgetNames):
obj = self._widgetNames[i]
num = n+1
if num == number:
#print 'switch to ',obj[0],' tp ',self.widget(num).layout().objectName()
#print num, self.widget(num).objectName(),self.widget(num).layout()
if self.widget(num).layout() is None:
LOG.error('''Cannot move widget '{}' to widget '{}', No layout found in '{}'
'''.format( obj[0].objectName(),self.widget(num).objectName(), self.widget(num).objectName()))
else:
self.widget(num).layout().addWidget(obj[0])
self.setCurrentIndex(num)
self._current_object = obj
self._current_number = num
self.widgetChanged.emit(num)
else:
#print 'replace',obj[0],' into ',obj[1]
obj[1].addWidget(obj[0])
obj[0].show()
#print '\n'
# show widget based on object name (a string)
def show_named_widget(self, name):
for num, i in enumerate(self._widgetNames):
obj = self._widgetNames[i]
if i == name:
self.addWidget(obj[0])
self.setCurrentWidget(obj[0])
self._current_object = obj
self._current_number = num
self.widgetChanged.emit(num)
else:
try:
obj[1].addWidget(obj[0])
except:
obj[0].setParent(obj[1])
obj[0].show()
# show the stacked widget as originally laid out (hopefully)
# This will set the stacked widget to display the first page
# which is index 0
def show_default(self):
for i in self._widgetNames:
obj = self._widgetNames[i]
if obj[2] is None:
obj[0].setParent(obj[1])
obj[0].show()
continue
obj[1].insertWidget(obj[2], obj[0])
obj[0].show()
self.setCurrentIndex(0)
self._current_object = None
self._current_number = 0
self.widgetChanged.emit(0)
def show_next(self):
total = len(self._widgetNames)
next = self._current_number + 1
if next > total:
next = 0
self.show_id_widget(next)
def get_current_object(self):
return self._current_object
def get_current_number(self):
return self._current_number
##############################
# required class boiler code #
##############################
def __getitem__(self, item):
return getattr(self, item)
def __setitem__(self, item, value):
return setattr(self, item, value)
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