- Now uses generated GUI
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@279 014f5005-505e-4b48-8d0a-63407b615a7c
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LtWorf
261
relational_gui/guihandler.py
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261
relational_gui/guihandler.py
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# -*- coding: utf-8 -*-
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# Relational
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# Copyright (C) 2008 Salvo "LtWorf" Tomaselli
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#
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# Relational is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# author Salvo "LtWorf" Tomaselli <tiposchi@tiscali.it>
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from PyQt4 import QtCore, QtGui
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from relational import relation, parser, optimizer
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import sys
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import about
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import survey
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import os
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import surveyForm
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import maingui
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class relForm(QtGui.QMainWindow):
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def __init__(self,ui):
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QtGui.QMainWindow.__init__(self)
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self.About=None
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self.Survey=None
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self.relations={} #Dictionary for relations
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self.undo=None #UndoQueue for queries
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self.selectedRelation=None
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self.ui=ui
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def load_query(self,*index):
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self.ui.txtQuery.setText(self.savedQ.itemData(index[0]).toString())
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def undoOptimize(self):
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'''Undoes the optimization on the query, popping one item from the undo list'''
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if self.undo!=None:
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self.ui.txtQuery.setText(self.undo)
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def optimize(self):
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'''Performs all the possible optimizations on the query'''
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self.undo=self.ui.txtQuery.text() #Storing the query in undo list
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result=optimizer.optimize_all(str(self.ui.txtQuery.text().toUtf8()),self.relations)
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self.ui.txtQuery.setText(QtCore.QString.fromUtf8(result))
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#self.txtQuery.setText(result)
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def execute(self):
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'''Executes the query'''
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try:
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#self.ui.lstAttributes.addItem (j)
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#Converting string to utf8 and then from qstring to normal string
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query=str(self.ui.txtQuery.text().toUtf8())
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expr=parser.parse(query)#Converting expression to python code
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print query,"-->" , expr #Printing debug
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result=eval(expr,self.relations) #Evaluating the expression
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#self.undo.insert(len(self.undo),self.txtQuery.text()) #Storing the query in undo list
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res_rel=str(self.ui.txtResult.text())#result relation's name
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self.ui.txtResult.setText("") #Sets the result relation name to none
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if len(res_rel)==0: #If no name is set use the default last_
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res_rel="last_"
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self.relations[res_rel]=result #Add the relation to the dictionary
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self.updateRelations() #update the list
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self.selectedRelation=result
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self.showRelation(self.selectedRelation) #Show the result in the table
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except Exception, e:
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print e
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QtGui.QMessageBox.information(None,QtGui.QApplication.translate("Form", "Error"),"%s\n%s" % (QtGui.QApplication.translate("Form", "Check your query!"),e.__str__()) )
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def showRelation(self,rel):
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'''Shows the selected relation into the table'''
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self.ui.table.clear()
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if rel==None: #No relation to show
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self.ui.table.setColumnCount(1)
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self.ui.table.headerItem().setText(0,"Empty relation")
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return
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self.ui.table.setColumnCount(len(rel.header.attributes))
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#Set content
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for i in rel.content:
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item = QtGui.QTreeWidgetItem()
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for j in range(len(i)):
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item.setText(j, i[j])
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self.ui.table.addTopLevelItem(item)
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#Sets columns
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for i in range(len(rel.header.attributes)):
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self.ui.table.headerItem().setText(i,rel.header.attributes[i])
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self.ui.table.resizeColumnToContents(i) #Must be done in order to avoid too small columns
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def printRelation(self,*rel):
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for i in rel:
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self.selectedRelation=self.relations[str(i.text().toUtf8())]
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self.showRelation(self.selectedRelation)
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def showAttributes(self,*other):
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'''Shows the attributes of the selected relation'''
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for i in other:
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rel=str(i.text().toUtf8())
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self.ui.lstAttributes.clear()
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for j in self.relations[rel].header.attributes:
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self.ui.lstAttributes.addItem (j)
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def updateRelations(self):
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self.ui.lstRelations.clear()
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for i in self.relations:
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if i != "__builtins__":
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self.ui.lstRelations.addItem(i)
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def saveRelation(self):
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filename = QtGui.QFileDialog.getSaveFileName(self,QtGui.QApplication.translate("Form", "Save Relation"),"",QtGui.QApplication.translate("Form", "Relations (*.csv)"))
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filename=str(filename.toUtf8()) #Converts QString to string
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if (len(filename)==0):#Returns if no file was selected
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return
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if (not filename.endswith(".csv")):#Adds extension if needed
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filename+=".csv"
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for i in self.ui.lstRelations.selectedItems():
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self.ui.relations[str(i.text().toUtf8())].save(filename)
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return
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def unloadRelation(self):
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for i in self.ui.lstRelations.selectedItems():
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del self.relations[str(i.text().toUtf8())]
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self.updateRelations()
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def showSurvey(self):
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if self.Survey==None:
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self.Survey=surveyForm.surveyForm()
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ui = survey.Ui_Form()
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self.Survey.setUi(ui)
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ui.setupUi(self.Survey)
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self.Survey.setDefaultValues()
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self.Survey.show()
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def showAbout(self):
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if self.About==None:
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self.About = QtGui.QDialog()
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ui = about.Ui_Dialog()
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ui.setupUi(self.About)
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self.About.show()
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def loadRelation(self,filename=None,name=None):
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'''Loads a relation. Without parameters it will ask the user which relation to load,
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otherwise it will load filename, giving it name.
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It shouldn't be called giving filename but not giving name.'''
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#Asking for file to load
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if filename==None:
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filename = QtGui.QFileDialog.getOpenFileName(self,QtGui.QApplication.translate("Form", "Load Relation"),"",QtGui.QApplication.translate("Form", "Relations (*.csv);;Old Relations (*.tlb);;Text Files (*.txt);;All Files (*)"))
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#Default relation's name
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f=str(filename.toUtf8()).split('/') #Split the full path
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defname=f[len(f)-1].lower() #Takes only the lowercase filename
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else:
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f=filename.split('/') #Split the full path
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defname=f[len(f)-1].lower() #Takes only the lowercase filename
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if len(defname)==0:
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return
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use_csv=True
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if defname.endswith(".tlb"):
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defname=defname[:-4]
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use_csv=False #Old format, not using csv
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if (defname.endswith(".csv")): #removes the extension
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defname=defname[:-4]
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if name==None: #Prompt dialog to insert name for the relation
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res=QtGui.QInputDialog.getText(self, QtGui.QApplication.translate("Form", "New relation"),QtGui.QApplication.translate("Form", "Insert the name for the new relation"),
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QtGui.QLineEdit.Normal,defname)
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if res[1]==False or len(res[0])==0:
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return
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#Patch provided by Angelo 'Havoc' Puglisi
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self.relations[str(res[0].toUtf8())]=relation.relation(str(filename.toUtf8()),use_csv)
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else: #name was decided by caller
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self.relations[name]=relation.relation(filename)
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self.updateRelations()
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def insertTuple(self):
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'''Shows an input dialog and inserts the inserted tuple into the selected relation'''
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res=QtGui.QInputDialog.getText(self, QtGui.QApplication.translate("Form", "New relation"),QtGui.QApplication.translate("Form", "Insert the values, comma separated"),
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QtGui.QLineEdit.Normal,"")
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if res[1]==False:
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return
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t=[]
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for i in str(res[0].toUtf8()).split(","):
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t.append(i.strip())
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if self.selectedRelation!=None and self.selectedRelation.insert(t) > 0:
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self.showRelation(self.selectedRelation)
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return
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def deleteTuple(self):
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'''Shows an input dialog and removes the tuples corresponding to the condition.'''
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res=QtGui.QInputDialog.getText(self, QtGui.QApplication.translate("Form", "New relation"),QtGui.QApplication.translate("Form", "Remove tuples: insert where condition"),
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QtGui.QLineEdit.Normal,"")
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if res[1]==False:
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return
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if self.selectedRelation!=None and self.selectedRelation.delete(str(res[0].toUtf8())) > 0:
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self.showRelation(self.selectedRelation)
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return
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def addProduct(self):
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self.addSymbolInQuery(u"*")
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def addDifference(self):
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self.addSymbolInQuery(u"-")
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def addUnion(self):
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self.addSymbolInQuery(u"ᑌ")
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def addIntersection(self):
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self.addSymbolInQuery(u"ᑎ")
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def addDivision(self):
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self.addSymbolInQuery(u"÷")
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def addOLeft(self):
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self.addSymbolInQuery(u"ᐅLEFTᐊ")
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def addJoin(self):
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self.addSymbolInQuery(u"ᐅᐊ")
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def addORight(self):
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self.addSymbolInQuery(u"ᐅRIGHTᐊ")
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def addOuter(self):
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self.addSymbolInQuery(u"ᐅFULLᐊ")
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def addProjection(self):
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self.addSymbolInQuery(u"π")
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def addSelection(self):
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self.addSymbolInQuery(u"σ")
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def addRename(self):
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self.addSymbolInQuery(u"ρ")
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def addArrow(self):
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self.addSymbolInQuery(u"➡")
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def addSymbolInQuery(self,symbol):
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self.ui.txtQuery.insert(symbol)
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self.ui.txtQuery.setFocus()
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def q_main():
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import sys
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app = QtGui.QApplication(sys.argv)
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Form = RelForm()
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ui = maingui.Ui_MainWindow()
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ui.setupUi(Form)
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Form.setupUi(ui)
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Form.show()
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sys.exit(app.exec_())
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if __name__ == "__main__":
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q_main()
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