Understanding MVC in a QAbstractTableModel - model-view-controller

Question

I have some data which are represented by a class of my own ; to fix the ideas I give an example.
class MyOwnModel():
def __init__(self, name="", number=0):
self.name = name
self.number = number
I then have a list of such instances, that I want to represent in a QTableView.
li = [MyOwnModel("a", 1), MyOwnModel("b", 2)]
Then I see two strategies to make a QTableView from that :
change MyOwnModel so that it subclasses QAbstractTableModel
build a new QAbstractTableModel which mimics MyOwnModel in a way that its attributes are for instance two QString and connect the dataChanged signal to a function which updates the instance of MyOwnModel
I am not completely satisfied with any of these, but I have no other idea for the moment.
Which one is the most suitable to my problem ? (I have a more complex class in practice but I would like to use the same framework)

Answer 1

As stated in the comment, your model is your list of object. You should subclass QAbstractTableModel to use this list.
Here's my code snippet for this:
import sys
import signal
import PyQt4.QtCore as PCore
import PyQt4.QtGui as PGui
class OneRow(PCore.QObject):
def __init__(self):
self.column0="text in column 0"
self.column1="text in column 1"
class TableModel(PCore.QAbstractTableModel):
def __init__(self):
super(TableModel,self).__init__()
self.myList=[]
def addRow(self,rowObject):
row=len(self.myList)
self.beginInsertRows(PCore.QModelIndex(),row,row)
self.myList.append(rowObject)
self.endInsertRows()
#number of row
def rowCount(self,QModelIndex):
return len(self.myList)
#number of columns
def columnCount(self,QModelIndex):
return 2
#Define what do you print in the cells
def data(self,index,role):
row=index.row()
col=index.column()
if role==PCore.Qt.DisplayRole:
if col==0:
return str( self.myList[row].column0)
if col==1:
return str( self.myList[row].column1)
#Rename the columns
def headerData(self,section,orientation,role):
if role==PCore.Qt.DisplayRole:
if orientation==PCore.Qt.Horizontal:
if section==0:
return str("Column 1")
elif section==1:
return str("Column 2")
if __name__=='__main__':
PGui.QApplication.setStyle("plastique")
app=PGui.QApplication(sys.argv)
#Model
model=TableModel()
model.addRow(OneRow())
model.addRow(OneRow())
#View
win=PGui.QTableView()
win.setModel(model)
#to be able to close wth ctrl+c
signal.signal(signal.SIGINT, signal.SIG_DFL)
#to avoid warning when closing
win.setAttribute(PCore.Qt.WA_DeleteOnClose)
win.show()
sys.exit(app.exec_())
Each element of myList is a row in the table.