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undoredo_system.py
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undoredo_system.py
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#Crappy Undo/Redo system
#Hey it works tho
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
class special_QLineEdit(QtGui.QLineEdit):
def __init__(self, parent=None):
self.previous_text = ""
self.ignore_undoredo_action = False
self.parent = parent
self.ignoreBrowseButtonSet = False
super(special_QLineEdit, self).__init__(parent)
#Disable standard context menu
self.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
def setText(self, text):
if self.ignoreBrowseButtonSet == True:
self.ignoreBrowseButtonSet = False
else:
self.previous_text = text
#emit our special signal
self.emit(QtCore.SIGNAL("undoredoUpdateSignal"), text)
super(special_QLineEdit, self).setText(text)
##Override the QLineEdit standard shortcuts and use global ones
def event(self, event):
if event.type() == QtCore.QEvent.ShortcutOverride:
return False
return QtGui.QLineEdit.event(self, event)
def customContextMenu(self, pos):
self.window().ui.menu_Edit.popup(self.mapToGlobal(pos))
class undoredo_item_QLineEdit(object):
def __init__(self, element):
self.element = element
self.prevtext = element.previous_text
self.curtext = element.text()
self.savedOn = False
#Get current tab
self.tab = element.window().ui.tabWidget.currentIndex()
#set current listwidget if necessary
self.current_listwidget = None
self.current_listwidget_row = 0
if self.tab == 2:
self.current_listwidget = element.window().ui.WLGwatchlistItemsList
self.current_listwidget_row = self.current_listwidget.currentRow()
elif self.tab == 3:
self.current_listwidget = element.window().ui.avoidlistItemsList
self.current_listwidget_row = element.window().ui.avoidlistItemsList.currentRow()
def execute(self, prev_item):
#Initiate undo or redo op
#Change tab, listwidget item if necessary, and set focus
self.element.window().ui.tabWidget.setCurrentIndex(self.tab)
if self.current_listwidget is not None:
self.current_listwidget.setCurrentRow(self.current_listwidget_row)
self.element.setFocus(QtCore.Qt.OtherFocusReason)
#Create our inverse object
inverse_obj = undoredo_item_QLineEdit(self.element)
#Update obj with new prevtext
self.element.setText(self.prevtext)
#set new prevtext
self.element.previous_text = prev_item.prevtext
#Set focus with OtherFocusReason (7)
self.element.setFocus(7)
return inverse_obj
class special_QTextEdit(QtGui.QPlainTextEdit):
def __init__(self, parent=None):
self.ignore_undoredo_action = False
self.parent = parent
super(special_QTextEdit, self).__init__(parent)
self.previous_text = self.toPlainText()
#Disable standard context menu
self.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
#Override the QTextEdit standard shortcuts and use global ones
def event(self, event):
if event.type() == QtCore.QEvent.ShortcutOverride:
return False
return QtGui.QPlainTextEdit.event(self, event)
def customContextMenu(self, pos):
self.window().ui.menu_Edit.popup(self.mapToGlobal(pos))
def setPlainText(self, text, ignore=True):
self.ignore_undoredo_action = ignore
self.previous_text = text
super(special_QTextEdit, self).setPlainText(text)
class undoredo_item_QTextEdit(object):
def __init__(self, element):
self.element = element
self.prevtext = element.previous_text
self.curtext = element.toPlainText()
self.savedOn = False
#Get current tab
self.tab = element.window().ui.tabWidget.currentIndex()
#set current listwidget if necessary
self.current_listwidget = None
self.current_listwidget_row = 0
if self.tab == 2:
self.current_listwidget = element.window().ui.WLGwatchlistItemsList
self.current_listwidget_row = self.current_listwidget.currentRow()
elif self.tab == 3:
self.current_listwidget = element.window().ui.avoidlistItemsList
self.current_listwidget_row = element.window().ui.avoidlistItemsList.currentRow()
def execute(self, prev_item):
#Initiate undo or redo op
#Change tab, listwidget item if necessary, and set focus
self.element.window().ui.tabWidget.setCurrentIndex(self.tab)
if self.current_listwidget is not None:
self.current_listwidget.setCurrentRow(self.current_listwidget_row)
self.element.setFocus(QtCore.Qt.OtherFocusReason)
#Create our inverse object
inverse_obj = undoredo_item_QTextEdit(self.element)
#Update obj with new prevtext
self.element.setPlainText(self.prevtext)
#set new prevtext
self.element.previous_text = prev_item.prevtext
#Set focus with OtherFocusReason (7)
self.element.setFocus(7)
#Set cursor position to the end
cursor = QtGui.QTextCursor(self.element.textCursor())
cursor.movePosition(QtGui.QTextCursor.End)
self.element.setTextCursor(cursor)
#return new stack item
return inverse_obj
class special_QCheckBox(QtGui.QCheckBox):
def __init__(self, parent=None):
self.ignore_undoredo_action = False
self.parent = parent
super(special_QCheckBox, self).__init__(parent)
self.previous_state = self.checkState()
def setCheckState(self, state):
self.previous_state = state
super(special_QCheckBox, self).setCheckState(state)
class undoredo_item_QCheckBox(object):
def __init__(self, element):
self.element = element
self.prevstate = element.previous_state
self.curstate = element.checkState()
self.savedOn = False
#Get current tab
self.tab = element.window().ui.tabWidget.currentIndex()
#set current listwidget if necessary
self.current_listwidget = None
self.current_listwidget_row = 0
if self.tab == 2:
self.current_listwidget = element.window().ui.WLGwatchlistItemsList
self.current_listwidget_row = self.current_listwidget.currentRow()
elif self.tab == 3:
self.current_listwidget = element.window().ui.avoidlistItemsList
self.current_listwidget_row = element.window().ui.avoidlistItemsList.currentRow()
def execute(self, prev_item):
#Initiate undo or redo op
#Change tab, listwidget item if necessary, and set focus
self.element.window().ui.tabWidget.setCurrentIndex(self.tab)
if self.current_listwidget is not None:
self.current_listwidget.setCurrentRow(self.current_listwidget_row)
self.element.setFocus(QtCore.Qt.OtherFocusReason)
#Create our inverse object
inverse_obj = undoredo_item_QCheckBox(self.element)
#Update obj with new prevstate
self.element.setCheckState(self.prevstate)
#set new prevstate
self.element.previous_state = prev_item.prevstate
#update watchlist
if self.tab == 2:
self.element.window().ui.guiActions.saveAllWatchlistItems()
elif self.tab == 3:
self.element.window().ui.guiActions.saveAllAvoidlistItems()
#Set focus with OtherFocusReason (7)
self.element.setFocus(7)
#return new stack item
return inverse_obj
class special_QComboBox(QtGui.QComboBox):
def __init__(self, parent=None):
self.ignore_undoredo_action = False
self.parent = parent
super(special_QComboBox, self).__init__(parent)
self.previous_state = self.currentIndex()
def setCurrentIndex(self, index):
self.previous_state = index
super(special_QComboBox, self).setCurrentIndex(index)
class undoredo_item_QComboBox(object):
def __init__(self, element):
self.element = element
self.prevstate = element.previous_state
self.curstate = element.currentIndex()
self.savedOn = False
#Get current tab
self.tab = element.window().ui.tabWidget.currentIndex()
#set current listwidget if necessary
self.current_listwidget = None
self.current_listwidget_row = 0
if self.tab == 2:
self.current_listwidget = element.window().ui.WLGwatchlistItemsList
self.current_listwidget_row = self.current_listwidget.currentRow()
elif self.tab == 3:
self.current_listwidget = element.window().ui.avoidlistItemsList
self.current_listwidget_row = element.window().ui.avoidlistItemsList.currentRow()
def execute(self, prev_item):
#Initiate undo or redo op
#Change tab, listwidget item if necessary, and set focus
self.element.window().ui.tabWidget.setCurrentIndex(self.tab)
if self.current_listwidget is not None:
self.current_listwidget.setCurrentRow(self.current_listwidget_row)
self.element.setFocus(QtCore.Qt.OtherFocusReason)
#Create our inverse object
inverse_obj = undoredo_item_QComboBox(self.element)
#Update obj with new prevstate
self.element.setCurrentIndex(self.prevstate)
#set new prevstate
self.element.previous_state = prev_item.prevstate
#return new stack item
return inverse_obj
class special_QSpinBox(QtGui.QSpinBox):
def __init__(self, parent=None):
self.ignore_undoredo_action = False
self.parent = parent
super(special_QSpinBox, self).__init__(parent)
self.previous_value = self.value()
self.firstSet = True
#Disable standard context menu
self.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
#Override the QTextEdit standard shortcuts and use global ones
def event(self, event):
if event.type() == QtCore.QEvent.ShortcutOverride:
return False
return QtGui.QSpinBox.event(self, event)
def customContextMenu(self, pos):
self.window().ui.menu_Edit.popup(self.mapToGlobal(pos))
def setValue(self, newval):
self.previous_value = newval
super(special_QSpinBox, self).setValue(newval)
class undoredo_item_QSpinBox(object):
def __init__(self, element, is_list_widget=None):
self.element = element
self.prevstate = element.previous_value
self.curstate = element.value()
self.savedOn = False
#Get current tab
self.tab = element.window().ui.tabWidget.currentIndex()
def execute(self, prev_item):
#Initiate undo or redo op
#Change tab and set focus
self.element.window().ui.tabWidget.setCurrentIndex(self.tab)
self.element.setFocus(QtCore.Qt.OtherFocusReason)
#Create our inverse object
inverse_obj = undoredo_item_QSpinBox(self.element)
#Update obj with new prevstate
self.element.setValue(self.prevstate)
#set new prevstate
self.element.previous_value = prev_item.prevstate
#return new stack item
return inverse_obj
class special_QListWidget(QtGui.QListWidget):
def __init__(self, parent=None):
self.ignore_undoredo_action = False
self.parent = parent
super(special_QListWidget, self).__init__(parent)
class undoredo_item_QListWidget(object):
def __init__(self, element, item, set_row, op=None):
self.element = element
self.savedOn = False
self.item = item
self.op = op
#Get current tab
self.tab = element.window().ui.tabWidget.currentIndex()
#set current listwidget
self.current_listwidget = element
self.current_listwidget_row = set_row
def execute(self, prev_item):
#Initiate undo or redo op
#Change tab
self.element.window().ui.tabWidget.setCurrentIndex(self.tab)
#Add or remove item from list
if self.op == "add":
iop = "rem"
#Remove and save the removed item for our inverse_obj
inverse_item = self.element.takeItem(self.current_listwidget_row)
#Set focus to whatever item is below us if possible
if self.element.count() == self.current_listwidget_row:
self.element.setCurrentRow(self.current_listwidget_row-1)
else:
self.element.setCurrentRow(self.current_listwidget_row)
elif self.op == "rem":
iop = "add"
inverse_item = self.item
self.element.insertItem(self.current_listwidget_row, self.item)
#Set focus to new item
self.element.setCurrentItem(self.item)
#Create our inverse object
inverse_obj = undoredo_item_QListWidget(self.element, inverse_item, self.current_listwidget_row, op=iop)
#return new stack item
return inverse_obj
class undoRedoSystem(object):
def __init__(self, context):
self.context = context
self.MW = self.context.MainWindow
self.undo_stack = []
self.redo_stack = []
def setupSlots(self):
#Here we do a simple type comparison to determine which cmd_ object to use for our undo/redo system
for section, element_list in self.context.SettingsManager.guiDefaults.iteritems():
for element in element_list:
#In the future, use self.context.findChild(QtCore.QObject, "myObjectName")
#If you dont have context for the mainWindow context use element.window().ui
live_element = eval("self.context.%s" % element)
#Set up our connections
if "special_QLineEdit" in str(type(live_element)):
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("textChanged(QString)")), self.new_undoredo_QLineEdit)
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("customContextMenuRequested(QPoint)")), live_element.customContextMenu)
elif "special_QTextEdit" in str(type(live_element)):
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("textChanged()")), self.new_undoredo_QTextEdit)
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("customContextMenuRequested(QPoint)")), live_element.customContextMenu)
elif "special_QCheckBox" in str(type(live_element)):
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.new_undoredo_QCheckBox)
elif "special_QComboBox" in str(type(live_element)):
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("currentIndexChanged(int)")), self.new_undoredo_QComboBox)
elif "special_QSpinBox" in str(type(live_element)):
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("valueChanged(int)")), self.new_undoredo_QSpinBox)
QtCore.QObject.connect(live_element, QtCore.SIGNAL(_fromUtf8("customContextMenuRequested(QPoint)")), live_element.customContextMenu)
def reset(self):
self.undo_stack = []
self.context.actionUndo.setEnabled(False)
self.redo_stack = []
self.context.actionRedo.setEnabled(False)
def undo(self):
#pop last stack item and execute it, then set the return obj
try:
op_item = self.undo_stack.pop(-1)
except:
return
new_stack_item = op_item.execute(op_item)
self.redo_stack.append(new_stack_item)
#Disable undo action if we are out of undo items
if len(self.undo_stack) == 0:
self.context.actionUndo.setEnabled(False)
#Enable redo action
self.context.actionRedo.setEnabled(True)
def redo(self):
#Same as above
try:
op_item = self.redo_stack.pop(-1)
except:
return
new_stack_item = op_item.execute(op_item)
self.undo_stack.append(new_stack_item)
#Disable redo action if we are out of redo items
if len(self.redo_stack) == 0:
self.context.actionRedo.setEnabled(False)
#Enable undo action
self.context.actionUndo.setEnabled(True)
def add_undo_item(self, stack_item):
self.undo_stack.append(stack_item)
self.context.actionUndo.setEnabled(True)
#Clear out redo history since we have now changed
self.redo_stack = []
self.context.actionRedo.setEnabled(False)
def new_undoredo_QLineEdit(self):
element = self.MW.sender()
if element.ignore_undoredo_action == True:
element.ignore_undoredo_action = False
return
if element.text() == element.previous_text:
return
stack_item = undoredo_item_QLineEdit(element)
self.add_undo_item(stack_item)
element.previous_text = element.text()
def new_undoredo_QTextEdit(self):
element = self.MW.sender()
if element.ignore_undoredo_action == True:
element.ignore_undoredo_action = False
return
if element.toPlainText() == element.previous_text:
return
stack_item = undoredo_item_QTextEdit(element)
self.add_undo_item(stack_item)
element.previous_text = element.toPlainText()
def new_undoredo_QCheckBox(self):
element = self.MW.sender()
if element.ignore_undoredo_action == True:
element.ignore_undoredo_action = False
return
if element.checkState() == element.previous_state:
return
stack_item = undoredo_item_QCheckBox(element)
self.add_undo_item(stack_item)
element.previous_state = element.checkState()
def new_undoredo_QComboBox(self):
element = self.MW.sender()
if element.ignore_undoredo_action == True:
element.ignore_undoredo_action = False
return
if element.currentIndex() == element.previous_state:
return
stack_item = undoredo_item_QComboBox(element)
self.add_undo_item(stack_item)
element.previous_state = element.currentIndex()
def new_undoredo_QSpinBox(self):
element = self.MW.sender()
if element.ignore_undoredo_action == True:
element.ignore_undoredo_action = False
if element.firstSet == True:
element.firstSet = False
else:
return
if element.value() == element.previous_value:
return
stack_item = undoredo_item_QSpinBox(element)
self.add_undo_item(stack_item)
element.previous_value = element.value()
def new_undoredo_QListWidget(self, element, item, op=None):
if element.ignore_undoredo_action == True:
element.ignore_undoredo_action = False
if element.firstSet == True:
element.firstSet = False
else:
return
stack_item = undoredo_item_QListWidget(element, item, element.currentRow(), op=op)
self.add_undo_item(stack_item)