def _deleteWidget_(self, widget):
"""
QT Slot to delete a widget from the layout.
Parameter :
- widget : The pysumo widget to delete.
"""
self.widgets.remove(widget.wrappedWidget)
widget.deleteLater()
QMenu = None
widgetType = type(widget.wrappedWidget)
if widgetType == TextEditor:
QMenu = self.menuTextEditorWidgets
elif widgetType == DocumentationWidget:
QMenu = self.menuDocumentationWidgets
elif widgetType == HierarchyWidget:
QMenu = self.menuHierarchyWidgets
elif widgetType == GraphWidget:
QMenu = self.menuGraphWidgets
if QMenu != None and len(QMenu.actions()) == 1:
QMenu.setEnabled(False)
if len(self.menuDelete.actions()) == 1:
self.menuDelete.setEnabled(False)
def contextMenuEvent(self, event):
"""
Create a nice looking popup menu.
"""
popup_menu = self.createStandardContextMenu()
cursor = self.textCursor()
cursor.select(cursor.WordUnderCursor)
self.setTextCursor(cursor)
if self.textCursor().hasSelection():
text = unicode(self.textCursor().selectedText())
if not self.dict.check(text):
spell_menu = QMenu('Suggestions')
for word in self.dict.suggest(text):
action = SpellAction(word, spell_menu)
action.correct.connect(self.correctWord)
spell_menu.addAction(action)
if len(spell_menu.actions()):
popup_menu.insertSeparator(popup_menu.actions()[0])
popup_menu.insertMenu(popup_menu.actions()[0], spell_menu)
popup_menu.exec_(event.globalPos())
def contextMenuEvent(self, event):
"""
Create a nice looking popup menu.
"""
popup_menu = self.createStandardContextMenu()
cursor = self.textCursor()
cursor.select(cursor.WordUnderCursor)
self.setTextCursor(cursor)
if self.textCursor().hasSelection():
text = unicode(self.textCursor().selectedText())
if not self.dict.check(text):
spell_menu = QMenu('Suggestions')
for word in self.dict.suggest(text):
action = SpellAction(word, spell_menu)
action.correct.connect(self.correctWord)
spell_menu.addAction(action)
if len(spell_menu.actions()):
popup_menu.insertSeparator(popup_menu.actions()[0])
popup_menu.insertMenu(popup_menu.actions()[0], spell_menu)
popup_menu.exec_(event.globalPos())
class Ui_MainWindow(QMainWindow):
"""Cette classe contient tous les widgets de notre application."""
defaultPalette = QPalette()
defaultPalette.setColor(QPalette.Base, QColor("#151515"))
defaultPalette.setColor(QPalette.Text, Qt.white)
def __init__(self):
super(Ui_MainWindow, self).__init__()
# initialise la GUI avec un exemple
self.text = "Ceci est un petit texte d'exemple."
# les variables sont en place, initialise la GUI
self.initUI()
# exécute l'exemple
self.orgText.setText(self.text)
self.encode_text(False)
self.logLab.setText(
u"Saisir du texte ou importer un fichier, puis pousser \n"
u"le bouton correspondant à l'opération souhaitée.")
def initUI(self):
"""Met en place les éléments de l'interface."""
# -+++++++------------------- main window -------------------+++++++- #
self.setWindowTitle(u"Encodage / Décodage de Huffman")
self.centerAndResize()
centralwidget = QWidget(self)
mainGrid = QGridLayout(centralwidget)
mainGrid.setColumnMinimumWidth(0, 450)
# -+++++++------------------ groupe analyse -----------------+++++++- #
analysGroup = QGroupBox(u"Analyse", centralwidget)
self.analysGrid = QGridLayout(analysGroup)
# ----------- groupe de la table des codes ---------- #
codeTableGroup = QGroupBox(u"Table des codes", analysGroup)
codeTableGrid = QGridLayout(codeTableGroup)
# un tableau pour les codes
self.codesTableModel = MyTableModel()
self.codesTable = QTableView(codeTableGroup)
self.codesTable.setModel(self.codesTableModel)
self.codesTable.setFont(QFont("Mono", 8))
self.codesTable.resizeColumnsToContents()
self.codesTable.setSortingEnabled(True)
codeTableGrid.addWidget(self.codesTable, 0, 0, 1, 1)
self.analysGrid.addWidget(codeTableGroup, 1, 0, 1, 1)
# ----------- label du ratio de compression ---------- #
self.ratioLab = QLabel(u"Ratio de compression: ", analysGroup)
font = QFont()
font.setBold(True)
font.setWeight(75)
font.setKerning(True)
self.ratioLab.setFont(font)
self.analysGrid.addWidget(self.ratioLab, 2, 0, 1, 1)
# -+++++++-------- groupe de la table de comparaison --------+++++++- #
self.compGroup = QGroupBox(analysGroup)
self.compGroup.setTitle(u"Comparaisons")
compGrid = QGridLayout(self.compGroup)
# un tableau pour le ratio
self.compTable = QTableWidget(self.compGroup)
sizePolicy = QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(
self.compTable.sizePolicy().hasHeightForWidth())
self.compTable.setSizePolicy(sizePolicy)
self.compTable.setBaseSize(QSize(0, 0))
font = QFont()
font.setWeight(50)
self.compTable.setFont(font)
self.compTable.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.compTable.setShowGrid(True)
self.compTable.setGridStyle(Qt.SolidLine)
# lignes / colonnes
self.compTable.setColumnCount(2)
self.compTable.setRowCount(3)
self.compTable.setVerticalHeaderItem(0, QTableWidgetItem("Taille (bits)"))
self.compTable.setVerticalHeaderItem(1, QTableWidgetItem("Entropie"))
self.compTable.setVerticalHeaderItem(2, QTableWidgetItem("Taille moy. (bits)"))
for i in range(2):
self.compTable.verticalHeaderItem(i).setTextAlignment(
Qt.AlignRight)
self.compTable.setHorizontalHeaderItem(0, QTableWidgetItem("ASCII"))
self.compTable.setHorizontalHeaderItem(1, QTableWidgetItem("Huffman"))
# nom des items
self.compTabASCIIMem = QTableWidgetItem()
self.compTable.setItem(0, 0, self.compTabASCIIMem)
self.compTabASCIIEnt = QTableWidgetItem()
self.compTable.setItem(1, 0, self.compTabASCIIEnt)
self.compTabASCIIAvg = QTableWidgetItem()
self.compTable.setItem(2, 0, self.compTabASCIIAvg)
self.compTabHuffMem = QTableWidgetItem()
self.compTable.setItem(0, 1, self.compTabHuffMem)
self.compTabHuffEnt = QTableWidgetItem()
self.compTable.setItem(1, 1, self.compTabHuffEnt)
self.compTabHuffAvg = QTableWidgetItem()
self.compTable.setItem(2, 1, self.compTabHuffAvg)
# parem du tableau
self.compTable.horizontalHeader().setCascadingSectionResizes(False)
self.compTable.verticalHeader().setVisible(True)
font = QFont("Mono", 8)
self.compTable.setFont(font)
compGrid.addWidget(self.compTable, 1, 0, 1, 1)
self.analysGrid.addWidget(self.compGroup, 0, 0, 1, 1)
mainGrid.addWidget(analysGroup, 0, 1, 1, 1)
# -+++++++----------------- groupe du texte -----------------+++++++- #
groupBox = QGroupBox(u"Texte", centralwidget)
textGrid = QGridLayout(groupBox)
# -+++++++------------- groupe du texte original ------------+++++++- #
orgTextGroup = QGroupBox(u"Texte original (Ctrl+T)", groupBox)
orgTextGrid = QGridLayout(orgTextGroup)
self.orgText = QTextEdit(orgTextGroup)
self.orgText.setPalette(self.defaultPalette)
orgTextGrid.addWidget(self.orgText, 0, 0, 1, 1)
textGrid.addWidget(orgTextGroup, 0, 0, 1, 2)
# -+++++++------------ groupe du texte compressé ------------+++++++- #
compressedTextGroup = QGroupBox(u"Texte compressé (Ctrl+H)", groupBox)
compressedTextGrid = QGridLayout(compressedTextGroup)
self.compressedText = QTextEdit(compressedTextGroup)
self.compressedText.setPalette(self.defaultPalette)
compressedTextGrid.addWidget(self.compressedText, 0, 0, 1, 1)
textGrid.addWidget(compressedTextGroup, 1, 0, 1, 2)
# -+++++++------------ groupe pour le texte ascii -----------+++++++- #
asciiTextGroup = QGroupBox(u"Texte ASCII", groupBox)
asciiTextGrid = QGridLayout(asciiTextGroup)
self.asciiText = QTextBrowser(asciiTextGroup)
self.asciiText.setPalette(self.defaultPalette)
asciiTextGrid.addWidget(self.asciiText, 0, 0, 1, 1)
textGrid.addWidget(asciiTextGroup, 2, 0, 1, 2)
# -+++++++-------------------- label de log -----------------+++++++- #
self.logLab = QLabel(analysGroup)
textGrid.addWidget(self.logLab, 3, 0, 1, 2)
# -+++++++----------- bouton pour encoder le texte ----------+++++++- #
self.encodeBut = QPushButton(groupBox)
self.encodeBut.setStatusTip(
u"Cliquez sur ce bouton pour encoder le texte original.")
self.encodeBut.setText(u"ENCODER")
self.encodeBut.clicked.connect(self.encode_text)
textGrid.addWidget(self.encodeBut, 4, 0, 1, 1)
# -+++++++----------- bouton pour décoder le texte ----------+++++++- #
self.decodeBut = QPushButton(groupBox)
self.decodeBut.setStatusTip(
u"Cliquez sur ce bouton pour décoder le texte compressé.")
self.decodeBut.setText(u"DÉCODER")
self.decodeBut.clicked.connect(self.decode_text)
textGrid.addWidget(self.decodeBut, 4, 1, 1, 1)
mainGrid.addWidget(groupBox, 0, 0, 1, 1)
self.setCentralWidget(centralwidget)
# -+++++++--------------- une barre de statut ---------------+++++++- #
self.setStatusBar(QStatusBar(self))
# -+++++++--------------------- le menu ---------------------+++++++- #
self.fileMenu = QMenu(u"Fichier")
self.fileMenu.addAction(u"Importer un texte...", self.open_text)
self.fileMenu.addAction(
u"Importer un texte encodé...", lambda: self.open_text(True))
self.fileMenu.addAction(u"Importer un dictionnaire...", self.open_dict)
self.fileMenu.addAction(u"Enregistrer le dictionnaire...", self.save_dict)
self.fileMenu.addAction(u"Quitter", self.close)
self.menuBar().addMenu(self.fileMenu)
QMetaObject.connectSlotsByName(self)
def open_text(self, compressed=False):
"""Ouvrir un fichier contenant un texte compressé ou non."""
fname, _ = QFileDialog.getOpenFileName(self, u'Ouvrir')
f = open(fname, 'r')
with f:
data = f.read()
if compressed:
self.compressedText.setText(data)
else:
self.orgText.setText(data)
def open_dict(self):
"""Ouvrir un dictionnaire de codes Huffman."""
fname, _ = QFileDialog.getOpenFileName(self, u'Ouvrir')
self.occ = {}
self.hCodes = {}
self.aCodes = {}
self.hCost = {}
self.aCost = {}
self.hCodes = create_dict_from_file(fname)
self.update_codes_table()
self.logLab.setText(u"Dictionnaire de Huffman importé.")
return self.hCodes
def save_dict(self):
"""Enregistrer le dictionnaire de codes Huffman."""
fname, _ = QFileDialog.getSaveFileName(self, "Enregistrer sous")
save_dict_to_file(fname, self.hCodes)
def make_tab_rows(self):
"""Génère le remplissage des lignes du tableau des codes."""
dictList = [self.occ, self.aCodes, self.hCodes, self.aCost, self.hCost]
tabList = []
charList = self.hCodes.keys() if self.hCodes else self.occ.keys()
for char in charList:
l = ["'" + char + "'"]
for dic in dictList:
try:
l.append(dic[char])
except KeyError:
l.append('')
tabList.append(l)
return tabList
def encode_text(self, wizard=True):
"""Encode le texte original."""
self.text = self.orgText.toPlainText().encode('utf-8')
if not self.text:
self.compressedText.setText(u"")
self.asciiText.setText(u"")
self.logLab.setText(
u"<font color=#A52A2A>Rien à compresser.</font>")
return
self.occ = {}
self.tree = ()
self.hCodes = {}
self.aCodes = {}
self.hCost = {}
self.aCost = {}
self.hSqueezed = []
self.aSqueezed = []
self.stringHSqueezed = ''
self.stringASqueezed = ''
if wizard:
self.launch_wizard(
EncodeWizard(self),
u"<font color=#008000>Compression achevée.</font>")
else:
self.make_occ()
self.make_tree()
self.make_codes()
self.make_cost()
self.make_encoded_text()
self.make_comp()
def decode_text(self, wizard=True):
"""Décode le texte compressé."""
self.codeString = str(
self.compressedText.toPlainText().replace(' ', ''))
if not self.codeString or not self.hCodes:
self.orgText.setText(u"")
self.asciiText.setText(u"")
if not self.codeString:
self.logLab.setText(
u"<font color=#A52A2A>Rien à décompresser.</font>")
if not self.hCodes:
self.logLab.setText(
u"<font color=#A52A2A>Dictionnaire indisponible pour la décompression.</font>")
return
self.text = ''
self.stringASqueezed = ''
if wizard:
self.launch_wizard(
DecodeWizard(self),
u"<font color=#008000>Texte décompressé.</font>")
else:
self.make_code_map()
self.make_decoded_text()
def launch_wizard(self, wizard, finishString):
"""Lance l'assistant d'en/décodage pour guider l'utilisateur.
Cache les options inaccessibles pendant l'assistant.
"""
self.logLab.setText(
u"<font color=#9E6A00>Opération en cours. "
u"Suivre les indications.</font>")
disItems = [self.orgText, self.compressedText, self.encodeBut,
self.decodeBut, self.fileMenu.actions()[1],
self.fileMenu.actions()[2], self.fileMenu.actions()[3]]
for item in disItems:
item.setEnabled(False)
self.compGroup.setVisible(False)
self.analysGrid.addWidget(wizard, 0, 0, 1, 1)
res = wizard.exec_()
if res:
self.logLab.setText(finishString)
else:
self.logLab.setText(
u"<font color=#A52A2A>Opération interrompue.</font>")
for item in disItems:
item.setEnabled(True)
self.compGroup.setVisible(True)
def update_ratio_lab(self):
"""Replace la valeur du label du ratio de compression."""
if not self.stringASqueezed:
val = '/'
else:
val = (len(self.stringHSqueezed.replace(' ', '')) /
float(len(self.stringASqueezed.replace(' ', ''))))
self.ratioLab.setText(unicode('Taux de compression: ' + str(val)))
def update_comp_table(self):
"""Met à jour le tableau de comparaison ASCII VS Huffman."""
self.compTabASCIIMem.setText(unicode(len(''.join(self.aSqueezed))))
self.compTabHuffMem.setText(unicode(len(''.join(self.hSqueezed))))
# entropie ?
self.compTabASCIIEnt.setText('0')
self.compTabHuffEnt.setText('0')
self.compTabASCIIAvg.setText(unicode(8))
self.compTabHuffAvg.setText(unicode(
average_code_length(self.hSqueezed)))
self.compTable.resizeColumnsToContents()
def update_codes_table(self, hlRow=[]):
"""Met à jour le tableau des codes et surligne les lignes de hlRow."""
self.codesTableModel.hlRow = hlRow
self.codesTableModel.emptyTable()
self.codesTableModel.fillTable(self.make_tab_rows())
self.codesTable.resizeColumnsToContents()
def centerAndResize(self):
"""Centre et redimmensionne le widget."""
screen = QDesktopWidget().screenGeometry()
self.resize(screen.width() / 1.6, screen.height() / 1.4)
size = self.geometry()
self.move(
(screen.width() - size.width()) / 2,
(screen.height() - size.height()) / 2)
#===================== METHODS FOR EN/DECODE WIZARDS =====================#
def make_encode_init(self):
self.compressedText.setText(unicode(self.stringHSqueezed))
self.asciiText.setText(unicode(self.stringASqueezed))
self.orgText.setTextColor(QColor(Qt.darkGreen))
self.orgText.setText(unicode(self.text.decode('utf-8')))
self.update_codes_table()
def make_occ(self):
self.orgText.setTextColor(QColor(Qt.white))
self.orgText.setText(unicode(self.text.decode('utf-8')))
self.occ = occurences(self.text)
self.update_codes_table([0, 1])
def make_tree(self):
self.tree = make_trie(self.occ)
self.update_codes_table()
def make_codes(self):
self.hCodes = make_codes(self.tree, {})
self.aCodes = make_ascii_codes(self.occ.keys(), {})
self.update_codes_table([2, 3])
def make_cost(self):
self.hCost = tree_cost(self.hCodes, self.occ)
self.aCost = tree_cost(self.aCodes, self.occ)
self.update_codes_table([4, 5])
def make_encoded_text(self):
self.hSqueezed = squeeze(self.text, self.hCodes)
self.aSqueezed = squeeze(self.text, self.aCodes)
self.stringHSqueezed = ' '.join(self.hSqueezed)
self.stringASqueezed = ' '.join(self.aSqueezed)
self.compressedText.setTextColor(QColor(Qt.darkGreen))
self.asciiText.setTextColor(QColor(Qt.darkYellow))
self.compressedText.setText(unicode(self.stringHSqueezed))
self.asciiText.setText(unicode(self.stringASqueezed))
self.update_codes_table()
def make_comp(self):
self.compressedText.setTextColor(QColor(Qt.white))
self.asciiText.setTextColor(QColor(Qt.white))
self.compressedText.setText(unicode(self.stringHSqueezed))
self.asciiText.setText(unicode(self.stringASqueezed))
self.update_codes_table()
self.update_comp_table()
self.update_ratio_lab()
def make_decode_init(self):
self.orgText.setText(unicode(self.text))
self.asciiText.setText(unicode(self.stringASqueezed))
self.compressedText.setTextColor(QColor(Qt.darkGreen))
self.compressedText.setText(self.compressedText.toPlainText())
def make_code_map(self):
self.compressedText.setTextColor(QColor(Qt.white))
self.compressedText.setText(self.compressedText.toPlainText())
self.orgText.setText(unicode(self.text))
self.asciiText.setText(unicode(self.stringASqueezed))
self.codeMap = dict(zip(self.hCodes.values(), self.hCodes.keys()))
self.update_codes_table([0, 3])
def make_decoded_text(self):
self.unSqueezed = unsqueeze(self.codeString, self.codeMap)
self.text = ''.join(self.unSqueezed)
self.orgText.setTextColor(QColor(Qt.darkGreen))
self.orgText.setText(unicode(self.text.decode('utf-8')))
self.asciiText.setText(unicode(self.stringASqueezed))
self.update_codes_table()
def make_ascii_decode(self):
self.orgText.setTextColor(QColor(Qt.white))
self.orgText.setText(unicode(self.text.decode('utf-8')))
self.aCodes = make_ascii_codes(self.codeMap.values(), {})
self.aSqueezed = squeeze(self.text, self.aCodes)
self.stringASqueezed = ' '.join(self.aSqueezed)
self.occ = occurences(self.text)
self.hCost = tree_cost(self.hCodes, self.occ)
self.aCost = tree_cost(self.aCodes, self.occ)
self.asciiText.setTextColor(QColor(Qt.darkGreen))
self.asciiText.setText(unicode(self.stringASqueezed))
self.update_codes_table([1, 2, 4, 5])