http://stackoverflow.com/questions/11453256

# -*- coding: utf-8 -*-
#imports:
import os
import platform
import sys
from PyQt4 import QtCore, QtGui
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from newchilddlg import NewChildDlg

#version:
__version__ = "1.0.0"


class MainWindow(QtGui.QMainWindow):

    COLUMNS = (
        'am', 'courtdate', 'board_number', 'namesurname', 'fathersname',
        'mothersname', 'birthday', 'placeofbirth', 'nationality', 'address',
        'tel', 'job', 'praxis', 'dayofdoing', 'placeofdoing'
    )

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)

        #Window size:
        self.resize(800,600)
        self.centralwidget = QtGui.QWidget(self)
        self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)

        #Table Widget:
        self.tableWidget = QtGui.QTableWidget(self.centralwidget)
        self.vBar = self.tableWidget.verticalScrollBar()
        self._vBar_lastVal = self.vBar.value()
        self.horizontalLayout.addWidget(self.tableWidget)
        self.vBar.valueChanged.connect(self.scrollbarChanged)
        self.tableWidget.setGridStyle(QtCore.Qt.SolidLine)
        self.tableWidget.setRowCount(100)
        self.tableWidget.setColumnCount(15)

        for i in xrange(15):
            item = QtGui.QTableWidgetItem()
            self.tableWidget.setHorizontalHeaderItem(i, item)

        self.tableWidget.horizontalHeader().setDefaultSectionSize(140)
        self.tableWidget.horizontalHeader().setHighlightSections(True)
        self.tableWidget.horizontalHeader().setStretchLastSection(False)
        self.tableWidget.verticalHeader().setDefaultSectionSize(30)
        self.tableWidget.verticalHeader().setStretchLastSection(False)
        self.horizontalLayout.addWidget(self.tableWidget)
        self.setCentralWidget(self.centralwidget)

        #Window Title:
        self.setWindowTitle(self.tr("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
        self.tableWidget.setSortingEnabled(False)

        #Collumns'names:
        item = self.tableWidget.horizontalHeaderItem(0)
        item.setText(self.tr("MainWindow", "Α.Μ.", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(1)
        item.setText(self.tr("MainWindow", "Ημερομηνία Δικάσιμου", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(2)
        item.setText(self.tr("MainWindow", "Αριθμός Πινακίου", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(3)
        item.setText(self.tr("MainWindow", "Ονοματεπώνυμο", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(4)
        item.setText(self.tr("MainWindow", "Όνομα Πατρός", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(5)
        item.setText(self.tr("MainWindow", "Όνομα Μητρός", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(6)
        item.setText(self.tr("MainWindow", "Ημερομηνία Γέννησης", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(7)
        item.setText(self.tr("MainWindow", "Τόπος Γέννησης", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(8)
        item.setText(self.tr("MainWindow", "Εθνικότητα", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(9)
        item.setText(self.tr("MainWindow", "Διεύθυνση Κατοικίας", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(10)
        item.setText(self.tr("MainWindow", "Τηλέφωνο", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(11)
        item.setText(self.tr("MainWindow", "Επάγγελμα-Ιδιότητα", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(12)
        item.setText(self.tr("MainWindow", "Πράξη", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(13)
        item.setText(self.tr("MainWindow", "Ημερομηνία Τέλεσης", None, QtGui.QApplication.UnicodeUTF8))
        item = self.tableWidget.horizontalHeaderItem(14)
        item.setText(self.tr("MainWindow", "Τόπος Τέλεσης", None, QtGui.QApplication.UnicodeUTF8))

        #menubar:
        self.menubar = QtGui.QMenuBar(self)
        self.menubar.setEnabled(True)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menuFile = self.menubar.addMenu("&File")
        self.menuFile.setSizeIncrement(QtCore.QSize(0, 0))
        self.menuEdit = self.menubar.addMenu("&Edit")
        self.setMenuBar(self.menubar)
        self.menuFile.setTitle(self.tr("MainWindow", "File", None, QtGui.QApplication.UnicodeUTF8))
        self.menuEdit.setTitle(self.tr("MainWindow", "Edit", None, QtGui.QApplication.UnicodeUTF8))

        #Creating Action filenewchild:
        self.filenewchild = self.createAction("&Εισαγωγή Ανηλίκου", self.doupdate, "Ctrl+C", "" ,"Εισαγωγή Δεδομέων Ανηλίκου")
        self.menuFile.addAction(self.filenewchild)
        self.filenewchild.setText(self.tr("MainWindow", "Εισαγωγή Ανηλίκου", None, QtGui.QApplication.UnicodeUTF8))

        # initialize the data structure
        self.children = dict(
            am = [],
            courtdate = [],
            board_number = [],
            namesurname = [],
            fathersname = [],
            mothersname = [],
            birthday = [],
            placeofbirth = [],
            nationality = [],
            address = [],
            tel = [],
            job = [],
            praxis = [],
            dayofdoing = [],
            placeofdoing = [],
        )

        #Adding objects from lists to the Table Widget:
        self.updatetable()


    # Growing rows while scrolling down....
    def scrollbarChanged(self, val):
        bar = self.vBar
        minVal, maxVal = bar.minimum(), bar.maximum()
        avg = (minVal+maxVal)/2
        rowCount = self.tableWidget.rowCount()
        if val > self._vBar_lastVal and val >= avg:
            self.tableWidget.insertRow(rowCount)
        elif val < self._vBar_lastVal:
            lastRow = rowCount-30
            empty = True
            for col in xrange(self.tableWidget.columnCount()):
                item = self.tableWidget.item(lastRow, col)
                if item and item.text():
                    empty=False
                    break
            if empty:
                self.tableWidget.removeRow(lastRow)
        self._vBar_lastVal = val


    #A function to help us create Actions faster:
    def createAction(self,text, slot=None, shortcut=None, icon=None,
                     tip=None, checkable=False, signal="triggered()"):
        action = QAction(text, self)
        if icon is not None:
            action.setIcon(QIcon(":/%s.png" % icon))
        if shortcut is not None:
            action.setShortcut(shortcut)
        if tip is not None:
            action.setToolTip(tip)
        if slot is not None:
            self.connect(action, SIGNAL(signal), slot)
        if checkable:
            action.setCheckable(True)
        return action


    #A function that updates the table:
    def updatetable(self):
        self.tableWidget.clear()
        for col, col_name in enumerate(self.COLUMNS):
            col_object = self.children[col_name]
            for row, value in enumerate(col_object):
                newItem = QtGui.QTableWidgetItem(value)
                self.tableWidget.setItem(row, col, newItem)

    #Handles NewChildDlg actions:
    def doupdate(self):
        d = NewChildDlg(self)
        if d.exec_():
            text = d.lineEdit.text()
            self.am.append(text)
            self.updatetable()

#Main loop:
if __name__ == '__main__':
    app = QApplication(sys.argv)
    myapp = MainWindow()
    myapp.show()
    sys.exit(app.exec_())