def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.About = None
self.Survey = None
self.undo = None # UndoQueue for queries
self.undo_program = None
self.selectedRelation = None
self.ui = maingui.Ui_MainWindow()
self.user_interface = UserInterface()
self.history_current_line = None
# Creates the UI
self.ui.setupUi(self)
# Setting fonts for symbols
f = QtGui.QFont()
size = f.pointSize()
if sys.platform.startswith('win'):
winFont = 'Cambria'
symbolFont = 'Segoe UI Symbol'
increment = 4
else:
winFont = f.family()
symbolFont = f.family()
increment = 2
font = QtGui.QFont(winFont, size + increment)
sfont = QtGui.QFont(symbolFont)
self.ui.lstHistory.setFont(font)
self.ui.txtMultiQuery.setFont(font)
self.ui.txtQuery.setFont(font)
self.ui.groupOperators.setFont(font)
self.ui.cmdClearMultilineQuery.setFont(sfont)
self.ui.cmdClearQuery.setFont(sfont)
self.settings = QtCore.QSettings()
self._restore_settings()
# Shortcuts
shortcuts = (
(self.ui.lstRelations, QtGui.QKeySequence.Delete,
self.unloadRelation),
(self.ui.lstRelations, 'Space',
lambda: self.printRelation(self.ui.lstRelations.currentItem())),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToNextLine,
self.next_history),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToPreviousLine,
self.prev_history),
)
self.add_shortcuts(shortcuts)
def optimize_program(code: str, rels: Dict[str, Relation]) -> str:
'''
Optimize an entire program, composed by multiple expressions
and assignments.
'''
lines = code.split('\n')
context: Dict[str, Node] = {}
last_res = None
for line in lines:
# skip comments or empty lines
line = line.strip()
if line.startswith(';') or not line:
continue
res, query = UserInterface.split_query(line)
last_res = res
parsed = tree(query)
_replace_leaves(parsed, context)
context[res] = parsed
if last_res is None:
return ''
node = optimize_all(context[last_res], rels, tostr=False)
return querysplit.split(node, rels)
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.About = None
self.Survey = None
self.undo = None # UndoQueue for queries
self.undo_program = None
self.selectedRelation = None
self.ui = maingui.Ui_MainWindow()
self.user_interface = UserInterface()
self.history_current_line = None
# Creates the UI
self.ui.setupUi(self)
# Setting fonts for symbols
f = QtGui.QFont()
size = f.pointSize()
if sys.platform.startswith('win'):
winFont = 'Cambria'
symbolFont = 'Segoe UI Symbol'
increment = 4
else:
winFont = f.family()
symbolFont = f.family()
increment = 2
font = QtGui.QFont(winFont, size + increment)
sfont = QtGui.QFont(symbolFont)
self.ui.lstHistory.setFont(font)
self.ui.txtMultiQuery.setFont(font)
self.ui.txtQuery.setFont(font)
self.ui.groupOperators.setFont(font)
self.ui.cmdClearMultilineQuery.setFont(sfont)
self.ui.cmdClearQuery.setFont(sfont)
self.settings = QtCore.QSettings()
self._restore_settings()
# Shortcuts
shortcuts = (
(self.ui.lstRelations, QtGui.QKeySequence.Delete, self.unloadRelation),
(self.ui.lstRelations, 'Space', lambda: self.printRelation(self.ui.lstRelations.currentItem())),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToNextLine, self.next_history),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToPreviousLine, self.prev_history),
)
self.add_shortcuts(shortcuts)
def optimize_program(code, rels: ContextDict):
'''
Optimize an entire program, composed by multiple expressions
and assignments.
'''
lines = code.split('\n')
context = {} # type: ContextDict
for line in lines:
line = line.strip()
if line.startswith(';') or not line:
continue
res, query = UserInterface.split_query(line)
last_res = res
parsed = tree(query)
optimizations.replace_leaves(parsed, context)
context[res] = parsed
node = optimize_all(context[last_res], rels, tostr=False)
return querysplit.split(node, rels)
class relForm(QtWidgets.QMainWindow):
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.About = None
self.Survey = None
self.undo = None # UndoQueue for queries
self.selectedRelation = None
self.ui = maingui.Ui_MainWindow()
self.user_interface = UserInterface()
self.history_current_line = None
# Creates the UI
self.ui.setupUi(self)
# Setting fonts for symbols
f = QtGui.QFont()
size = f.pointSize()
if sys.platform.startswith('win'):
winFont = 'Cambria'
symbolFont = 'Segoe UI Symbol'
increment = 4
else:
winFont = f.family()
symbolFont = f.family()
increment = 2
font = QtGui.QFont(winFont, size + increment)
sfont = QtGui.QFont(symbolFont)
self.ui.lstHistory.setFont(font)
self.ui.txtMultiQuery.setFont(font)
self.ui.txtQuery.setFont(font)
self.ui.groupOperators.setFont(font)
self.ui.cmdClearMultilineQuery.setFont(sfont)
self.ui.cmdClearQuery.setFont(sfont)
self.settings = QtCore.QSettings()
self._restore_settings()
# Shortcuts
shortcuts = (
(self.ui.lstRelations, QtGui.QKeySequence.Delete,
self.unloadRelation),
(self.ui.lstRelations, 'Space',
lambda: self.printRelation(self.ui.lstRelations.currentItem())),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToNextLine,
self.next_history),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToPreviousLine,
self.prev_history),
)
self.add_shortcuts(shortcuts)
def next_history(self):
if self.ui.lstHistory.currentRow() + 1 == self.ui.lstHistory.count(
) and self.history_current_line:
self.ui.txtQuery.setText(self.history_current_line)
self.history_current_line = None
elif self.history_current_line:
self.ui.lstHistory.setCurrentRow(self.ui.lstHistory.currentRow() +
1)
self.resumeHistory(self.ui.lstHistory.currentItem())
def prev_history(self):
if self.history_current_line is None:
self.history_current_line = self.ui.txtQuery.text()
if self.ui.lstHistory.currentItem() is None:
return
if not self.ui.lstHistory.currentItem().text(
) != self.ui.txtQuery.text():
self.ui.lstHistory.setCurrentRow(
self.ui.lstHistory.currentRow() - 1)
elif self.ui.lstHistory.currentRow() > 0:
self.ui.lstHistory.setCurrentRow(self.ui.lstHistory.currentRow() -
1)
self.resumeHistory(self.ui.lstHistory.currentItem())
def add_shortcuts(self, shortcuts):
for widget, shortcut, slot in shortcuts:
action = QtWidgets.QAction(self)
action.triggered.connect(slot)
action.setShortcut(QtGui.QKeySequence(shortcut))
# I couldn't find the constant
action.setShortcutContext(0)
widget.addAction(action)
def checkVersion(self):
from relational import maintenance
online = maintenance.check_latest_version()
if online is None:
r = QtWidgets.QApplication.translate("Form", "Network error")
elif online > version:
r = QtWidgets.QApplication.translate(
"Form", "New version available online: %s." % online)
elif online == version:
r = QtWidgets.QApplication.translate("Form",
"Latest version installed.")
else:
r = QtWidgets.QApplication.translate(
"Form", "You are using an unstable version.")
QtWidgets.QMessageBox.information(
self, QtWidgets.QApplication.translate("Form", "Version"), r)
def setHistoryShown(self, history_shown):
self.history_shown = history_shown
self.settings.setValue('history_shown', history_shown)
self.ui.lstHistory.setVisible(history_shown)
self.ui.actionShow_history.setChecked(history_shown)
def setMultiline(self, multiline):
self.multiline = multiline
self.settings.setValue('multiline', multiline)
if multiline:
index = 0
else:
index = 1
self.ui.stackedWidget.setCurrentIndex(index)
self.ui.actionMulti_line_mode.setChecked(multiline)
def load_query(self, *index):
self.ui.txtQuery.setText(self.savedQ.itemData(index[0]).toString())
def undoOptimize(self):
'''Undoes the optimization on the query, popping one item from the undo list'''
if self.undo != None:
self.ui.txtQuery.setText(self.undo)
def optimize(self):
'''Performs all the possible optimizations on the query'''
self.undo = self.ui.txtQuery.text() # Storing the query in undo list
res_rel, query = self.user_interface.split_query(
self.ui.txtQuery.text(), None)
try:
trace = []
result = optimizer.optimize_all(query,
self.user_interface.relations,
debug=trace)
print('==== Optimization steps ====')
print(query)
print('\n'.join(trace))
print('========')
if res_rel:
result = '%s = %s' % (res_rel, result)
self.ui.txtQuery.setText(result)
except Exception as e:
self.error(e)
def resumeHistory(self, item):
if item is None:
return
itm = item.text()
self.ui.txtQuery.setText(itm)
def execute(self):
# Show the 'Processing' frame
self.ui.stackedWidget.setCurrentIndex(2)
QtCore.QCoreApplication.processEvents()
try:
'''Executes the query'''
if self.multiline:
query = self.ui.txtMultiQuery.toPlainText()
self.settings.setValue('multiline/query', query)
else:
query = self.ui.txtQuery.text()
try:
self.selectedRelation = self.user_interface.multi_execute(
query)
except Exception as e:
return self.error(e)
finally:
self.updateRelations() # update the list
self.showRelation(self.selectedRelation)
if not self.multiline:
# Last in history
item = self.ui.lstHistory.item(self.ui.lstHistory.count() - 1)
if item is None or item.text() != query:
# Adds to history if it is not already the last
hitem = QtWidgets.QListWidgetItem(None, 0)
hitem.setText(query)
self.ui.lstHistory.addItem(hitem)
self.ui.lstHistory.setCurrentItem(hitem)
finally:
# Restore the normal frame
self.setMultiline(self.multiline)
def showRelation(self, rel):
'''Shows the selected relation into the table'''
self.ui.table.clear()
if rel == None: # No relation to show
self.ui.table.setColumnCount(1)
self.ui.table.headerItem().setText(0, "Empty relation")
return
self.ui.table.setColumnCount(len(rel.header))
# Set content
for i in rel.content:
item = QtWidgets.QTreeWidgetItem()
for j, k in enumerate(i):
item.setText(j, k)
self.ui.table.addTopLevelItem(item)
# Sets columns
for i, attr in enumerate(rel.header):
self.ui.table.headerItem().setText(i, attr)
self.ui.table.resizeColumnToContents(i)
def printRelation(self, item):
self.selectedRelation = self.user_interface.relations[item.text()]
self.showRelation(self.selectedRelation)
def showAttributes(self, item):
'''Shows the attributes of the selected relation'''
rel = item.text()
self.ui.lstAttributes.clear()
for j in self.user_interface.relations[rel].header:
self.ui.lstAttributes.addItem(j)
def updateRelations(self):
self.ui.lstRelations.clear()
for i in self.user_interface.relations:
if i != "__builtins__":
self.ui.lstRelations.addItem(i)
def saveRelation(self):
if self.selectedRelation is None:
r = QtWidgets.QApplication.translate("Form",
"Select a relation first.")
QtWidgets.QMessageBox.information(
self, QtWidgets.QApplication.translate("Form", "Error"), r)
return
filename = QtWidgets.QFileDialog.getSaveFileName(
self, QtWidgets.QApplication.translate("Form",
"Save Relation"), "",
QtWidgets.QApplication.translate("Form", "Relations (*.csv)"))[0]
if (len(filename) == 0): # Returns if no file was selected
return
self.selectedRelation.save(filename)
def unloadRelation(self):
for i in self.ui.lstRelations.selectedItems():
del self.user_interface.relations[i.text()]
self.updateRelations()
def newSession(self):
self.user_interface.session_reset()
self.updateRelations()
def editRelation(self):
from relational_gui import creator
for i in self.ui.lstRelations.selectedItems():
result = creator.edit_relation(
self.user_interface.get_relation(i.text()))
if result != None:
self.user_interface.set_relation(i.text(), result)
self.updateRelations()
def error(self, exception):
print(exception)
QtWidgets.QMessageBox.information(
None, QtWidgets.QApplication.translate("Form", "Error"),
str(exception))
def promptRelationName(self):
while True:
res = QtWidgets.QInputDialog.getText(
self, QtWidgets.QApplication.translate("Form", "New relation"),
QtWidgets.QApplication.translate(
"Form", "Insert the name for the new relation"),
QtWidgets.QLineEdit.Normal, '')
if res[1] == False: # or len(res[0]) == 0:
return None
name = res[0]
if not rtypes.is_valid_relation_name(name):
r = QtWidgets.QApplication.translate(
"Form",
str("Wrong name for destination relation: %s." % name))
QtWidgets.QMessageBox.information(
self, QtWidgets.QApplication.translate("Form", "Error"), r)
continue
return name
def newRelation(self):
from relational_gui import creator
result = creator.edit_relation()
if result == None:
return
name = self.promptRelationName()
try:
self.user_interface.relations[name] = result
self.updateRelations()
except Exception as e:
self.error(e)
def closeEvent(self, event):
self.save_settings()
event.accept()
def save_settings(self):
self.settings.setValue('maingui/geometry', self.saveGeometry())
self.settings.setValue('maingui/windowState', self.saveState())
self.settings.setValue('maingui/splitter',
self.ui.splitter.saveState())
self.settings.setValue('maingui/relations',
self.user_interface.session_dump())
def _restore_settings(self):
self.user_interface.session_restore(
self.settings.value('maingui/relations'))
self.updateRelations()
self.setMultiline(self.settings.value('multiline', 'false') == 'true')
self.setHistoryShown(
self.settings.value('history_shown', 'true') == 'true')
self.ui.txtMultiQuery.setPlainText(
self.settings.value('multiline/query', ''))
try:
self.restoreGeometry(self.settings.value('maingui/geometry'))
self.restoreState(self.settings.value('maingui/windowState'))
self.ui.splitter.restoreState(
self.settings.value('maingui/splitter'))
except:
pass
def showSurvey(self):
if self.Survey == None:
self.Survey = surveyForm.surveyForm()
ui = survey.Ui_Form()
self.Survey.setUi(ui)
ui.setupUi(self.Survey)
self.Survey.setDefaultValues()
self.Survey.show()
def showAbout(self):
if self.About == None:
self.About = QtWidgets.QDialog()
ui = about.Ui_Dialog()
ui.setupUi(self.About)
self.About.show()
def loadRelation(self, filenames=None):
'''Loads a relation. Without parameters it will ask the user which relation to load,
otherwise it will load filename, giving it name.
It shouldn't be called giving filename but not giving name.'''
# Asking for file to load
if not filenames:
f = QtWidgets.QFileDialog.getOpenFileNames(
self, QtWidgets.QApplication.translate("Form",
"Load Relation"), "",
QtWidgets.QApplication.translate(
"Form",
"Relations (*.csv);;Text Files (*.txt);;All Files (*)"))
filenames = f[0]
for f in filenames:
# Default relation's name
name = self.user_interface.suggest_name(f)
if name is None:
name = self.promptRelationName()
if name is None:
continue
try:
self.user_interface.load(f, name)
except Exception as e:
self.error(e)
continue
self.updateRelations()
def addProduct(self):
self.addSymbolInQuery(parser.PRODUCT)
def addDifference(self):
self.addSymbolInQuery(parser.DIFFERENCE)
def addUnion(self):
self.addSymbolInQuery(parser.UNION)
def addIntersection(self):
self.addSymbolInQuery(parser.INTERSECTION)
def addDivision(self):
self.addSymbolInQuery(parser.DIVISION)
def addOLeft(self):
self.addSymbolInQuery(parser.JOIN_LEFT)
def addJoin(self):
self.addSymbolInQuery(parser.JOIN)
def addORight(self):
self.addSymbolInQuery(parser.JOIN_RIGHT)
def addOuter(self):
self.addSymbolInQuery(parser.JOIN_FULL)
def addProjection(self):
self.addSymbolInQuery(parser.PROJECTION)
def addSelection(self):
self.addSymbolInQuery(parser.SELECTION)
def addRename(self):
self.addSymbolInQuery(parser.RENAME)
def addArrow(self):
self.addSymbolInQuery(parser.ARROW)
def addSymbolInQuery(self, symbol):
if self.multiline:
self.ui.txtMultiQuery.insertPlainText(symbol)
self.ui.txtMultiQuery.setFocus()
else:
self.ui.txtQuery.insert(symbol)
self.ui.txtQuery.setFocus()
class relForm(QtWidgets.QMainWindow):
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.About = None
self.Survey = None
self.undo = None # UndoQueue for queries
self.undo_program = None
self.selectedRelation = None
self.ui = maingui.Ui_MainWindow()
self.user_interface = UserInterface()
self.history_current_line = None
# Creates the UI
self.ui.setupUi(self)
# Setting fonts for symbols
f = QtGui.QFont()
size = f.pointSize()
if sys.platform.startswith('win'):
winFont = 'Cambria'
symbolFont = 'Segoe UI Symbol'
increment = 4
else:
winFont = f.family()
symbolFont = f.family()
increment = 2
font = QtGui.QFont(winFont, size + increment)
sfont = QtGui.QFont(symbolFont)
self.ui.lstHistory.setFont(font)
self.ui.txtMultiQuery.setFont(font)
self.ui.txtQuery.setFont(font)
self.ui.groupOperators.setFont(font)
self.ui.cmdClearMultilineQuery.setFont(sfont)
self.ui.cmdClearQuery.setFont(sfont)
self.settings = QtCore.QSettings()
self._restore_settings()
# Shortcuts
shortcuts = (
(self.ui.lstRelations, QtGui.QKeySequence.Delete, self.unloadRelation),
(self.ui.lstRelations, 'Space', lambda: self.printRelation(self.ui.lstRelations.currentItem())),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToNextLine, self.next_history),
(self.ui.txtQuery, QtGui.QKeySequence.MoveToPreviousLine, self.prev_history),
)
self.add_shortcuts(shortcuts)
def next_history(self):
if self.ui.lstHistory.currentRow() + 1 == self.ui.lstHistory.count() and self.history_current_line:
self.ui.txtQuery.setText(self.history_current_line)
self.history_current_line = None
elif self.history_current_line:
self.ui.lstHistory.setCurrentRow(self.ui.lstHistory.currentRow()+1)
self.resumeHistory(self.ui.lstHistory.currentItem())
def prev_history(self):
if self.history_current_line is None:
self.history_current_line = self.ui.txtQuery.text()
if self.ui.lstHistory.currentItem() is None:
return
if not self.ui.lstHistory.currentItem().text() != self.ui.txtQuery.text():
self.ui.lstHistory.setCurrentRow(self.ui.lstHistory.currentRow()-1)
elif self.ui.lstHistory.currentRow() > 0:
self.ui.lstHistory.setCurrentRow(self.ui.lstHistory.currentRow()-1)
self.resumeHistory(self.ui.lstHistory.currentItem())
def add_shortcuts(self, shortcuts):
for widget,shortcut,slot in shortcuts:
action = QtWidgets.QAction(self)
action.triggered.connect(slot)
action.setShortcut(QtGui.QKeySequence(shortcut))
# I couldn't find the constant
action.setShortcutContext(0)
widget.addAction(action)
def checkVersion(self):
from relational import maintenance
online = maintenance.check_latest_version()
if online is None:
r = QtWidgets.QApplication.translate("Form", "Network error")
elif online > version:
r = QtWidgets.QApplication.translate(
"Form", "New version available online: %s." % online)
elif online == version:
r = QtWidgets.QApplication.translate(
"Form", "Latest version installed.")
else:
r = QtWidgets.QApplication.translate(
"Form", "You are using an unstable version.")
QtWidgets.QMessageBox.information(
self, QtWidgets.QApplication.translate("Form", "Version"), r)
def setHistoryShown(self, history_shown):
self.history_shown = history_shown
self.settings.setValue('history_shown', history_shown)
self.ui.lstHistory.setVisible(history_shown)
self.ui.actionShow_history.setChecked(history_shown)
def setMultiline(self, multiline):
self.multiline = multiline
self.settings.setValue('multiline', multiline)
if multiline:
index = 0
else:
index = 1
self.ui.stackedWidget.setCurrentIndex(index)
self.ui.actionMulti_line_mode.setChecked(multiline)
def load_query(self, *index):
self.ui.txtQuery.setText(self.savedQ.itemData(index[0]).toString())
def undoOptimize(self):
'''Undoes the optimization on the query, popping one item from the undo list'''
if self.undo != None:
self.ui.txtQuery.setText(self.undo)
def undoOptimizeProgram(self):
if self.undo_program:
self.ui.txtMultiQuery.setPlainText(self.undo_program)
def optimizeProgram(self):
self.undo_program = self.ui.txtMultiQuery.toPlainText()
result = optimizer.optimize_program(
self.ui.txtMultiQuery.toPlainText(),
self.user_interface.relations
)
self.ui.txtMultiQuery.setPlainText(result)
def optimize(self):
'''Performs all the possible optimizations on the query'''
self.undo = self.ui.txtQuery.text() # Storing the query in undo list
res_rel,query = self.user_interface.split_query(self.ui.txtQuery.text(),None)
try:
trace = []
result = optimizer.optimize_all(
query,
self.user_interface.relations,
debug=trace
)
print('==== Optimization steps ====')
print(query)
print('\n'.join(trace))
print('========')
if res_rel:
result = '%s = %s' % (res_rel, result)
self.ui.txtQuery.setText(result)
except Exception as e:
self.error(e)
def resumeHistory(self, item):
if item is None:
return
itm = item.text()
self.ui.txtQuery.setText(itm)
def execute(self):
# Show the 'Processing' frame
self.ui.stackedWidget.setCurrentIndex(2)
QtCore.QCoreApplication.processEvents()
try:
'''Executes the query'''
if self.multiline:
query = self.ui.txtMultiQuery.toPlainText()
self.settings.setValue('multiline/query', query)
else:
query = self.ui.txtQuery.text()
if not query.strip():
return
try:
self.selectedRelation = self.user_interface.multi_execute(query)
except Exception as e:
return self.error(e)
finally:
self.updateRelations() # update the list
self.showRelation(self.selectedRelation)
if not self.multiline:
# Last in history
item = self.ui.lstHistory.item(self.ui.lstHistory.count() - 1)
if item is None or item.text() != query:
# Adds to history if it is not already the last
hitem = QtWidgets.QListWidgetItem(None, 0)
hitem.setText(query)
self.ui.lstHistory.addItem(hitem)
self.ui.lstHistory.setCurrentItem(hitem)
finally:
# Restore the normal frame
self.setMultiline(self.multiline)
def showRelation(self, rel):
'''Shows the selected relation into the table'''
self.ui.table.clear()
if rel is None: # No relation to show
self.ui.table.setColumnCount(1)
self.ui.table.headerItem().setText(0, "Empty relation")
return
self.ui.table.setColumnCount(len(rel.header))
# Set content
for i in rel.content:
item = QtWidgets.QTreeWidgetItem()
for j,k in enumerate(i):
item.setText(j, k)
self.ui.table.addTopLevelItem(item)
# Sets columns
for i, attr in enumerate(rel.header):
self.ui.table.headerItem().setText(i, attr)
self.ui.table.resizeColumnToContents(i)
def printRelation(self, item):
self.selectedRelation = self.user_interface.relations[item.text()]
self.showRelation(self.selectedRelation)
def showAttributes(self, item):
'''Shows the attributes of the selected relation'''
rel = item.text()
self.ui.lstAttributes.clear()
for j in self.user_interface.relations[rel].header:
self.ui.lstAttributes.addItem(j)
def updateRelations(self):
self.ui.lstRelations.clear()
for i in self.user_interface.relations:
if i != "__builtins__":
self.ui.lstRelations.addItem(i)
def saveRelation(self):
if not self.ui.lstRelations.selectedItems():
r = QtWidgets.QApplication.translate(
"Form", "Select a relation first."
)
QtWidgets.QMessageBox.information(
self, QtWidgets.QApplication.translate("Form", "Error"), r
)
return
filename = QtWidgets.QFileDialog.getSaveFileName(
self, QtWidgets.QApplication.translate("Form", "Save Relation"),
"",
QtWidgets.QApplication.translate("Form", "Relations (*.csv)")
)[0]
if (len(filename) == 0): # Returns if no file was selected
return
relname = self.ui.lstRelations.selectedItems()[0].text()
self.user_interface.relations[relname].save(filename)
def unloadRelation(self):
for i in self.ui.lstRelations.selectedItems():
del self.user_interface.relations[i.text()]
self.updateRelations()
def newSession(self):
self.user_interface.session_reset()
self.updateRelations()
def editRelation(self):
from relational_gui import creator
for i in self.ui.lstRelations.selectedItems():
result = creator.edit_relation(
self.user_interface.get_relation(i.text())
)
if result != None:
self.user_interface.set_relation(i.text(), result)
self.updateRelations()
def error(self, exception):
print (exception)
QtWidgets.QMessageBox.information(
None, QtWidgets.QApplication.translate("Form", "Error"),
str(exception)
)
def promptRelationName(self):
while True:
res = QtWidgets.QInputDialog.getText(
self,
QtWidgets.QApplication.translate("Form", "New relation"),
QtWidgets.QApplication.translate(
"Form", "Insert the name for the new relation"),
QtWidgets.QLineEdit.Normal, ''
)
if res[1] == False: # or len(res[0]) == 0:
return None
name = res[0]
if not rtypes.is_valid_relation_name(name):
r = QtWidgets.QApplication.translate(
"Form", str(
"Wrong name for destination relation: %s." % name)
)
QtWidgets.QMessageBox.information(
self, QtWidgets.QApplication.translate("Form", "Error"), r
)
continue
return name
def newRelation(self):
from relational_gui import creator
result = creator.edit_relation()
if result is None:
return
name = self.promptRelationName()
try:
self.user_interface.relations[name] = result
self.updateRelations()
except Exception as e:
self.error(e)
def closeEvent(self, event):
self.save_settings()
event.accept()
def save_settings(self):
self.settings.setValue('maingui/geometry', self.saveGeometry())
self.settings.setValue('maingui/windowState', self.saveState())
self.settings.setValue('maingui/splitter', self.ui.splitter.saveState())
self.settings.setValue('maingui/relations', self.user_interface.session_dump())
def _restore_settings(self):
self.user_interface.session_restore(self.settings.value('maingui/relations'))
self.updateRelations()
self.setMultiline(self.settings.value('multiline', 'false') == 'true')
self.setHistoryShown(self.settings.value('history_shown', 'true') == 'true')
self.ui.txtMultiQuery.setPlainText(
self.settings.value('multiline/query', ''))
try:
self.restoreGeometry(self.settings.value('maingui/geometry'))
self.restoreState(self.settings.value('maingui/windowState'))
self.ui.splitter.restoreState(self.settings.value('maingui/splitter'))
except:
pass
def showSurvey(self):
if self.Survey is None:
self.Survey = surveyForm.surveyForm()
ui = survey.Ui_Form()
self.Survey.setUi(ui)
ui.setupUi(self.Survey)
self.Survey.setDefaultValues()
self.Survey.show()
def showAbout(self):
if self.About is None:
self.About = QtWidgets.QDialog()
ui = about.Ui_Dialog()
ui.setupUi(self.About)
self.About.show()
def loadRelation(self, filenames=None):
'''Loads a relation. Without parameters it will ask the user which relation to load,
otherwise it will load filename, giving it name.
It shouldn't be called giving filename but not giving name.'''
# Asking for file to load
if not filenames:
f = QtWidgets.QFileDialog.getOpenFileNames(
self,
QtWidgets.QApplication.translate("Form", "Load Relation"),
"",
QtWidgets.QApplication.translate(
"Form",
"Relations (*.csv);;Text Files (*.txt);;All Files (*)"
)
)
filenames = f[0]
for f in filenames:
# Default relation's name
name = self.user_interface.suggest_name(f)
if name is None:
name = self.promptRelationName()
if name is None:
continue
try:
self.user_interface.load(f, name)
except Exception as e:
self.error(e)
continue
self.updateRelations()
def addProduct(self):
self.addSymbolInQuery(parser.PRODUCT)
def addDifference(self):
self.addSymbolInQuery(parser.DIFFERENCE)
def addUnion(self):
self.addSymbolInQuery(parser.UNION)
def addIntersection(self):
self.addSymbolInQuery(parser.INTERSECTION)
def addDivision(self):
self.addSymbolInQuery(parser.DIVISION)
def addOLeft(self):
self.addSymbolInQuery(parser.JOIN_LEFT)
def addJoin(self):
self.addSymbolInQuery(parser.JOIN)
def addORight(self):
self.addSymbolInQuery(parser.JOIN_RIGHT)
def addOuter(self):
self.addSymbolInQuery(parser.JOIN_FULL)
def addProjection(self):
self.addSymbolInQuery(parser.PROJECTION)
def addSelection(self):
self.addSymbolInQuery(parser.SELECTION)
def addRename(self):
self.addSymbolInQuery(parser.RENAME)
def addArrow(self):
self.addSymbolInQuery(parser.ARROW)
def addSymbolInQuery(self, symbol):
if self.multiline:
self.ui.txtMultiQuery.insertPlainText(symbol)
self.ui.txtMultiQuery.setFocus()
else:
self.ui.txtQuery.insert(symbol)
self.ui.txtQuery.setFocus()