Hello,
I don't know how to get numeric data from my model to my GUI, if they
aren't floats but decimal.Decimal. In the following example the last
column of the view and the last QLineEdit of the form both stay empty.
The model data are printed to the console and it can be seen that the
model contains the correct data for the last column and that they have
the right type. But the GUI doesn't show them. What should I change?
Thanks for hints,
Sibylle
# modeltest.py
import sys
import decimal
import datetime
from PyQt4 import QtCore
from PyQt4 import QtGui
RAWDATA = [(1, "First", datetime.date(2012, 7, 15), 1.25,
decimal.Decimal(2.5)),
(2, "Second", datetime.date(2011, 6, 10), 3.77,
decimal.Decimal(7.54)),
(3, "Third", datetime.date(2010, 5, 27), 5.03,
decimal.Decimal(10.06))]
class MyDialog(QtGui.QDialog):
def __init__(self, data, parent=None):
super(MyDialog, self).__init__(parent)
self.myModel = self.setupModel(data)
self.showModelData()
view = self.setupView()
form = self.setupForm()
view.selectionModel().currentRowChanged.connect(
self.mapper.setCurrentModelIndex)
layout = QtGui.QVBoxLayout()
layout.addWidget(view)
layout.addWidget(form)
self.setLayout(layout)
#self.mapper.toFirst()
view.selectRow(0)
def setupModel(self, data):
md = QtGui.QStandardItemModel(len(data), 5)
md.setHorizontalHeaderLabels(["Int", "String", "Date", "Float",
"Decimal"])
for (i, row) in enumerate(data):
# Integer
item = QtGui.QStandardItem()
item.setData(row[0], QtCore.Qt.EditRole)
md.setItem(i, 0, item)
# String
md.setItem(i, 1, QtGui.QStandardItem(row[1]))
item = QtGui.QStandardItem()
# First try: use datetime.date as is. Result:
# Date column in view empty, QDateEdit shows 1.1.2000
# item.setData(row[2], QtCore.Qt.EditRole)
# Second try: convert to QDate via string
dt = QtCore.QDate.fromString(row[2].isoformat(),
QtCore.Qt.ISODate)
item.setData(dt, QtCore.Qt.EditRole)
md.setItem(i, 2, item)
# Float
item = QtGui.QStandardItem()
item.setData(row[3], QtCore.Qt.EditRole)
md.setItem(i, 3, item)
# Decimal
item = QtGui.QStandardItem()
item.setData(row[4], QtCore.Qt.EditRole)
md.setItem(i, 4, item)
return md
def setupView(self):
view = QtGui.QTableView()
view.setModel(self.myModel)
view.setAlternatingRowColors(True)
view.setSelectionMode(QtGui.QTableView.SingleSelection)
view.setSelectionBehavior(QtGui.QTableView.SelectRows)
view.resizeColumnsToContents()
return view
def setupForm(self):
# set up the widgets
intBox = QtGui.QSpinBox()
strEdit = QtGui.QLineEdit()
dateEdit = QtGui.QDateEdit()
floatEdit = QtGui.QLineEdit()
decEdit = QtGui.QLineEdit()
# set up the mapper
self.mapper = QtGui.QDataWidgetMapper(self)
self.mapper.setModel(self.myModel)
self.mapper.addMapping(intBox, 0)
self.mapper.addMapping(strEdit, 1)
self.mapper.addMapping(dateEdit, 2)
self.mapper.addMapping(floatEdit, 3)
self.mapper.addMapping(decEdit, 4)
# set up the layout
form = QtGui.QWidget()
layout = QtGui.QFormLayout()
layout.addRow("Int:", intBox)
layout.addRow("String:", strEdit)
layout.addRow("Date:", dateEdit)
layout.addRow("Float:", floatEdit)
layout.addRow("Decimal:", decEdit)
form.setLayout(layout)
return form
def showModelData(self):
print("--- Model data: ---")
for i in range(self.myModel.rowCount()):
inr = self.myModel.data(self.myModel.index(i, 0))
desc = self.myModel.data(self.myModel.index(i, 1))
day = self.myModel.data(self.myModel.index(i, 2))
fl = self.myModel.data(self.myModel.index(i, 3))
dec = self.myModel.data(self.myModel.index(i, 4))
print("{0}: {1} / {2}, {3}, {4} ({5})".format(inr, desc,
day, fl,
dec, type(dec)))
print("--- End of model data ---")
app = QtGui.QApplication(sys.argv)
dia = MyDialog(RAWDATA)
dia.show()
app.exec_()
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