class QAliasList(QtGui.QTreeWidget):
"""
QAliasList just inherits from QListView to have a customized
list and items
"""
#signals
aliasUpdated = pyqtSignal(Alias)
aliasRemoved = pyqtSignal(str)
highlightModule = pyqtSignal(int)
def __init__(self, controller, panel, parent=None):
""" QAliasList(parent: QWidget) -> QAliasTable
"""
QtGui.QTreeWidget.__init__(self, parent)
self.setSizePolicy(QtGui.QSizePolicy.Expanding,
QtGui.QSizePolicy.Expanding)
self.setRootIsDecorated(False)
self.panel = panel
self.aliases = Bidict()
self.alias_widgets = {}
self.current_item = None
self.controller = controller
self.header().setStretchLastSection(True)
self.setHeaderLabels(QtCore.QStringList() << "Position" << "Name" << "Type")
self.itemSelectionChanged.connect(self.setPreviousSelected)
self.connect(self,
QtCore.SIGNAL("currentItemChanged(QTreeWidgetItem*,QTreeWidgetItem*)"),
self.currentAliasChanged)
self.previousSelected = -1
@pyqtSlot()
def setPreviousSelected(self):
if len(self.selectedItems()) == 1:
item = self.selectedItems()[0]
self.previousSelected = self.indexOfTopLevelItem(item)
else:
self.previousSelected = -1
def processCellChanges(self, row, col):
""" processCellChanges(row: int, col: int) -> None
Event handler for capturing when the contents in a cell changes
"""
item = self.item(row, col)
if col == 0:
old_alias = item.alias.alias
new_alias = str(item.text())
if new_alias in self.aliases.keys():
QtGui.QMessageBox.warning(self,
"VisMashup",
"""Label name %s already exists.
Please type a different name. """ %
new_alias)
item.setText(old_alias)
return
elif new_alias == '':
del self.aliases[old_alias]
wdgt = self.cellWidget(row, 1)
del self.alias_widgets[wdgt]
item.alias.alias = ''
self.removeRow(row)
wdgt.deleteLater()
self.updateRowNumbers()
else:
self.aliases[new_alias] = self.aliases[old_alias]
del self.aliases[old_alias]
item.alias.alias = new_alias
elif col == 1:
wdgt = self.cellWidget(row,col)
if wdgt is not None:
item.alias.value = wdgt.contents()
self.aliasUpdated.emit(item.alias)
def currentAliasChanged(self, current, previous):
if current:
if ((previous is not None and current.alias != previous.alias) or
previous is None):
self.highlightModule.emit(current.alias.component.vtmid)
else:
self.highlightModule.emit(-1)
def _getOtherParameterInfo(self, pipeline, id, ptype):
parameter = pipeline.db_get_object(ptype,id)
return (parameter.type, parameter.strValue, 1, parameter.pos)
def createAliasItem(self, alias):
""" createAliasRow( alias: core.mashup.Alias) -> AliasItem
Creates a row in the list
"""
alias.pos = self.topLevelItemCount()
labels = QtCore.QStringList() << str(alias.component.pos) << str(alias.name) << \
str(alias.component.type)
item = QAliasListItem(self, alias, labels)
item.setFlags(QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable )
return alias
def populateFromMashup(self, mashupController):
#print "populateFromMashup ", self , self.previousSelected
if self.controller != mashupController:
self.controller = mashupController
self.itemSelectionChanged.disconnect(self.setPreviousSelected)
self.aliases = {}
self.alias_cache = {}
self.alias_widgets = {}
self.clear()
mashup = self.controller.currentMashup
if len(mashup.alias_list) > 0:
for alias in mashup.alias_list:
alias = self.createAliasItem(copy.copy(alias))
self.aliases[alias.name] = alias
if (self.previousSelected > -1 and
self.previousSelected < self.topLevelItemCount()):
item = self.topLevelItem(self.previousSelected)
self.setItemSelected(item, True)
self.itemSelectionChanged.connect(self.setPreviousSelected)
def updatePosNumbers(self):
new_order = []
for idx in range(self.topLevelItemCount()):
item = self.topLevelItem(idx)
new_order.append(item.alias.component.pos)
item.setText(0,str(idx))
return new_order
def moveItemToNewPos(self, old, new):
"""moveItemToNewPos(old:int, new:int) -> None
Move item from pos old to pos new
"""
self.itemSelectionChanged.disconnect(self.panel.updateInspector)
item = self.takeTopLevelItem(old)
self.insertTopLevelItem(new,item)
self.clearSelection()
new_order = self.updatePosNumbers()
self.setItemSelected(item, True)
self.itemSelectionChanged.connect(self.panel.updateInspector)
self.controller.reorderAliases(new_order)
def keyPressEvent(self, event):
""" keyPressEvent(event: QKeyEvent) -> None
Capture 'Del', 'Backspace' for deleting aliases
"""
if (event.key() in [QtCore.Qt.Key_Backspace, QtCore.Qt.Key_Delete]):
self.removeCurrentAlias()
@pyqtSlot(bool)
def removeCurrentAlias(self, checked=False):
item = self.currentItem()
name = item.alias.name
res = show_question("Mashups",
"Are you sure do you want to remove '%s' from the mashup?"%name,
[YES_BUTTON, NO_BUTTON], NO_BUTTON)
if res == YES_BUTTON:
old_alias = item.alias.name
del self.aliases[old_alias]
pos = self.indexOfTopLevelItem(item)
self.takeTopLevelItem(pos)
self.updatePosNumbers()
if pos < self.topLevelItemCount() -1:
new_item = self.topLevelItem(pos)
else:
new_item = self.topLevelItem(pos-1)
self.setCurrentItem(new_item)
self.aliasRemoved.emit(name)
class QAliasList(QtGui.QTreeWidget):
"""
QAliasList just inherits from QListView to have a customized
list and items
"""
#signals
aliasUpdated = pyqtSignal(Alias)
aliasRemoved = pyqtSignal(str)
highlightModule = pyqtSignal(int)
def __init__(self, controller, panel, parent=None):
""" QAliasList(parent: QWidget) -> QAliasTable
"""
QtGui.QTreeWidget.__init__(self, parent)
self.setSizePolicy(QtGui.QSizePolicy.Expanding,
QtGui.QSizePolicy.Expanding)
self.setRootIsDecorated(False)
self.panel = panel
self.aliases = Bidict()
self.alias_widgets = {}
self.current_item = None
self.controller = controller
self.header().setStretchLastSection(True)
self.setHeaderLabels(
QtCore.QStringList() << "Position" << "Name" << "Type")
self.itemSelectionChanged.connect(self.setPreviousSelected)
self.connect(
self,
QtCore.SIGNAL(
"currentItemChanged(QTreeWidgetItem*,QTreeWidgetItem*)"),
self.currentAliasChanged)
self.previousSelected = -1
@pyqtSlot()
def setPreviousSelected(self):
if len(self.selectedItems()) == 1:
item = self.selectedItems()[0]
self.previousSelected = self.indexOfTopLevelItem(item)
else:
self.previousSelected = -1
def processCellChanges(self, row, col):
""" processCellChanges(row: int, col: int) -> None
Event handler for capturing when the contents in a cell changes
"""
item = self.item(row, col)
if col == 0:
old_alias = item.alias.alias
new_alias = str(item.text())
if new_alias in self.aliases.keys():
QtGui.QMessageBox.warning(
self, "VisMashup", """Label name %s already exists.
Please type a different name. """ %
new_alias)
item.setText(old_alias)
return
elif new_alias == '':
del self.aliases[old_alias]
wdgt = self.cellWidget(row, 1)
del self.alias_widgets[wdgt]
item.alias.alias = ''
self.removeRow(row)
wdgt.deleteLater()
self.updateRowNumbers()
else:
self.aliases[new_alias] = self.aliases[old_alias]
del self.aliases[old_alias]
item.alias.alias = new_alias
elif col == 1:
wdgt = self.cellWidget(row, col)
if wdgt is not None:
item.alias.value = wdgt.contents()
self.aliasUpdated.emit(item.alias)
def currentAliasChanged(self, current, previous):
if current:
if ((previous is not None and current.alias != previous.alias)
or previous is None):
self.highlightModule.emit(current.alias.component.vtmid)
else:
self.highlightModule.emit(-1)
def _getOtherParameterInfo(self, pipeline, id, ptype):
parameter = pipeline.db_get_object(ptype, id)
return (parameter.type, parameter.strValue, 1, parameter.pos)
def createAliasItem(self, alias):
""" createAliasRow( alias: core.mashup.Alias) -> AliasItem
Creates a row in the list
"""
alias.pos = self.topLevelItemCount()
labels = QtCore.QStringList() << str(alias.component.pos) << str(alias.name) << \
str(alias.component.type)
item = QAliasListItem(self, alias, labels)
item.setFlags(QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable)
return alias
def populateFromMashup(self, mashupController):
#print "populateFromMashup ", self , self.previousSelected
if self.controller != mashupController:
self.controller = mashupController
self.itemSelectionChanged.disconnect(self.setPreviousSelected)
self.aliases = {}
self.alias_cache = {}
self.alias_widgets = {}
self.clear()
mashup = self.controller.currentMashup
if len(mashup.alias_list) > 0:
for alias in mashup.alias_list:
alias = self.createAliasItem(copy.copy(alias))
self.aliases[alias.name] = alias
if (self.previousSelected > -1
and self.previousSelected < self.topLevelItemCount()):
item = self.topLevelItem(self.previousSelected)
self.setItemSelected(item, True)
self.itemSelectionChanged.connect(self.setPreviousSelected)
def updatePosNumbers(self):
new_order = []
for idx in range(self.topLevelItemCount()):
item = self.topLevelItem(idx)
new_order.append(item.alias.component.pos)
item.setText(0, str(idx))
return new_order
def moveItemToNewPos(self, old, new):
"""moveItemToNewPos(old:int, new:int) -> None
Move item from pos old to pos new
"""
self.itemSelectionChanged.disconnect(self.panel.updateInspector)
item = self.takeTopLevelItem(old)
self.insertTopLevelItem(new, item)
self.clearSelection()
new_order = self.updatePosNumbers()
self.setItemSelected(item, True)
self.itemSelectionChanged.connect(self.panel.updateInspector)
self.controller.reorderAliases(new_order)
def keyPressEvent(self, event):
""" keyPressEvent(event: QKeyEvent) -> None
Capture 'Del', 'Backspace' for deleting aliases
"""
if (event.key() in [QtCore.Qt.Key_Backspace, QtCore.Qt.Key_Delete]):
self.removeCurrentAlias()
@pyqtSlot(bool)
def removeCurrentAlias(self, checked=False):
item = self.currentItem()
name = item.alias.name
res = show_question(
"Mashups",
"Are you sure do you want to remove '%s' from the mashup?" % name,
[YES_BUTTON, NO_BUTTON], NO_BUTTON)
if res == YES_BUTTON:
old_alias = item.alias.name
del self.aliases[old_alias]
pos = self.indexOfTopLevelItem(item)
self.takeTopLevelItem(pos)
self.updatePosNumbers()
if pos < self.topLevelItemCount() - 1:
new_item = self.topLevelItem(pos)
else:
new_item = self.topLevelItem(pos - 1)
self.setCurrentItem(new_item)
self.aliasRemoved.emit(name)
