358 lines
12 KiB
Python
358 lines
12 KiB
Python
# Relational
|
|
# Copyright (C) 2008 Salvo "LtWorf" Tomaselli
|
|
#
|
|
# Relational 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 3 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.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
# author Salvo "LtWorf" Tomaselli <tiposchi@tiscali.it>
|
|
from PyQt5 import QtCore, QtWidgets, QtWidgets
|
|
|
|
from relational import relation, parser, optimizer, rtypes
|
|
from relational.maintenance import user_interface
|
|
|
|
from relational_gui import about
|
|
from relational_gui import survey
|
|
from relational_gui import surveyForm
|
|
from relational_gui import maingui
|
|
|
|
|
|
class relForm(QtWidgets.QMainWindow):
|
|
|
|
def __init__(self, ui):
|
|
QtWidgets.QMainWindow.__init__(self)
|
|
self.About = None
|
|
self.Survey = None
|
|
self.undo = None # UndoQueue for queries
|
|
self.selectedRelation = None
|
|
self.ui = ui
|
|
self.qcounter = 1 # Query counter
|
|
self.user_interface = user_interface()
|
|
|
|
self.settings = QtCore.QSettings()
|
|
|
|
def checkVersion(self):
|
|
from relational import maintenance
|
|
online = maintenance.check_latest_version()
|
|
|
|
if 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 setMultiline(self, multiline):
|
|
self.multiline = multiline
|
|
self.settings.setValue('multiline', multiline)
|
|
self.ui.lineExpressionFrame.setVisible(not multiline)
|
|
self.ui.frmOptimizations.setVisible(not multiline)
|
|
self.ui.frmMultiLine.setVisible(multiline)
|
|
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
|
|
|
|
query = self.ui.txtQuery.text()
|
|
try:
|
|
result = optimizer.optimize_all(
|
|
query, self.user_interface.relations)
|
|
self.ui.txtQuery.setText(result)
|
|
except Exception as e:
|
|
self.error(e)
|
|
|
|
def resumeHistory(self, item):
|
|
itm = item.text().split(' = ', 1)
|
|
self.ui.txtResult.setText(itm[0])
|
|
self.ui.txtQuery.setText(itm[1])
|
|
|
|
def _run_multiline(self):
|
|
query = self.ui.txtMultiQuery.toPlainText()
|
|
self.settings.setValue('multiline/query', query)
|
|
|
|
try:
|
|
result = self.user_interface.multi_execute(query)
|
|
except Exception as e:
|
|
return self.error(e)
|
|
self.updateRelations() # update the list
|
|
self.selectedRelation = result
|
|
self.showRelation(self.selectedRelation)
|
|
|
|
def execute(self):
|
|
'''Executes the query'''
|
|
if self.multiline:
|
|
return self._run_multiline()
|
|
|
|
# Single line query
|
|
query = self.ui.txtQuery.text()
|
|
res_rel = self.ui.txtResult.text() # result relation's name
|
|
|
|
try:
|
|
self.selectedRelation = self.user_interface.execute(query, res_rel)
|
|
self.updateRelations() # update the list
|
|
self.showRelation(self.selectedRelation)
|
|
except Exception as e:
|
|
return self.error(e)
|
|
|
|
# Adds to history
|
|
item = u'%s = %s' % (
|
|
self.ui.txtResult.text(),
|
|
self.ui.txtQuery.text()
|
|
)
|
|
hitem = QtWidgets.QListWidgetItem(None, 0)
|
|
hitem.setText(item)
|
|
self.ui.lstHistory.addItem(hitem)
|
|
self.ui.lstHistory.setCurrentItem(hitem)
|
|
|
|
self.qcounter += 1
|
|
# Sets the result relation name to none
|
|
self.ui.txtResult.setText(u"_last%d" % self.qcounter)
|
|
|
|
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 in range(len(i)):
|
|
item.setText(j, i[j])
|
|
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) # Must be done in order to avoid too small columns
|
|
|
|
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 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)
|
|
finally:
|
|
return
|
|
|
|
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())
|
|
|
|
def restore_settings(self):
|
|
# self.settings.value('session_name','default').toString()
|
|
self.setMultiline(self.settings.value('multiline', 'false') == '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'))
|
|
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()
|