[Python] How to manipulate a text file that is displayed in a QListView.

Dimitrius

I made a PyQt interface where I select a text file on my computer and it is displayed in a QListView.
Now what I want to do is edit this text file (. Txt) into this QListView (Delete and add data) using python.
Any idea?

My code:
@# -- coding: utf-8 --

Form implementation generated from reading ui file 'modelo.ui'

Created: Wed Feb 19 15:04:23 2014

by: PyQt4 UI code generator 4.10.3

WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
from PyQt4 import QtCore, QtGui
import sys
import os
from PyQt4 import QtCore, QtGui
from Tkinter import *
import tkFileDialog
import Tkconstants
from PyQt4 import QtGui as qt

try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s

try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)

class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName(_fromUtf8("Form"))
Form.resize(582, 409)
self.listView = QtGui.QListView(Form)
self.listView.setGeometry(QtCore.QRect(10, 40, 561, 351))
self.listView.setObjectName(_fromUtf8("listView"))
self.splitter = QtGui.QSplitter(Form)
self.splitter.setGeometry(QtCore.QRect(20, 10, 113, 22))
self.splitter.setOrientation(QtCore.Qt.Horizontal)
self.splitter.setObjectName(_fromUtf8("splitter"))
self.label = QtGui.QLabel(self.splitter)
self.label.setObjectName(_fromUtf8("label"))
self.toolButton = QtGui.QToolButton(self.splitter)
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap(_fromUtf8("../../../Users/Dimitrius/Desktop/7547_128x128.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
self.toolButton.setIcon(icon)
self.toolButton.setObjectName(_fromUtf8("toolButton"))

    self.retranslateUi(Form)
    QtCore.QMetaObject.connectSlotsByName(Form)

def retranslateUi(self, Form):
    Form.setWindowTitle(_translate("Form", "Form", None))
    self.label.setText(_translate("Form", "Selecionar modelo:", None))
    self.toolButton.setText(_translate("Form", "...", None))

class myclass(QtGui.QMainWindow):
def init(self):
QtGui.QMainWindow.init(self)
self.ui = Ui_Form()
self.ui.setupUi(self)

criei um atributo que irah mante o nome do arquivo

self._nome_do_arquivo = ""

     QtCore.QObject.connect(self.ui.toolButton, QtCore.SIGNAL('clicked()'), self.slot1)

def slot1(self):
fileName = qt.QFileDialog.getOpenFileName(self, "Open Data File", "", "txt data files (*.txt)")

guardei o nome do arquivo no atributo

self._nome_do_arquivo = fileName
print fileName
self.leitura()

  #pass

def leitura(self):
lstModelo = QtGui.QStandardItemModel()
#lstModelo.clear()

abri o arquivo

with open(self._nome_do_arquivo, 'r+') as txt:

carreguei o conteúdo do arquivo para txt

for linha in txt:
# cada linha será impressa
strItem = QtGui.QStandardItem(linha)
lstModelo.appendRow(strItem)
# print linha

adiciona o buffer de dados para o componente de tela

     self.ui.listView.setModel( lstModelo )

if name == 'main':
import sys
from PyQt4 import QtCore

app = QtGui.QApplication(sys.argv)
av = myclass() 
lstModelo = QtGui.QStandardItemModel()
av.ui.listView.setModel( lstModelo )

av.show()
sys.exit(app.exec_())

@

SGaist

Hi,

Do you mean directly edit the file ? Or just update it at some point ?

Dimitrius

I really want to update it, because sometimes I will need to add or drop a line in the middle file (which will be the case Paths).

SGaist

Then you can add the add/remove logic to your view plus a save button that will "dump" your model content overwriting the file

Dimitrius

But what is the code that I can use to remove and save?

SGaist

removeRow to remove a row of text.

And to save take the other way of loading, go trough each row of your model and write its content to a QFile