[email protected] schrieb:
Simon Hibbs <[email protected]> writes:
I've written a stock portfolio tracker in pyqt4. The main window which
is a QAbstractTableModel has an Update button. When I click it, the
program gets new stock prices and updates the data in the table.
My problem is that the data displayed in the table doesn't update until
the window loses and regains focus....
If you're loading the data into the database directly using SQL, then QT
won't be aware of the change. You could tryusing
QSqlRelationalTableModel.setData() to push the data into the model. It's
described here:
Thanks for the reply.
I'm not using SQL.
I get updated prices for stocks from Yahoo. That changes the stuff
being displayed.
The init method is like this:
class MyTableModel(QAbstractTableModel):
def __init__(self, datain, headerdata, parent=None, *args):
QAbstractTableModel.__init__(self, parent, *args)
self.arraydata = datain
self.headerdata = headerdata
and the init method gets called like this;
tm = MyTableModel(self.tabledata, header, self)
My problem is getting new data from tabledata into the display.
The init above works but later on from a shortcut I
tabledata and do:
tm.changeData(self.tabledata)
and changeData does:
def changeData(self, datain):
self.emit(SIGNAL("LayoutAboutToBeChanged()"))
self.arraydata = datain
self.emit(SIGNAL("LayoutChanged()"))
I also tried changing the word "Layout" to "Data" but neither
causes the table to update after the shortcut.
If I unfocus and focus the window it does update.
So I think I'm getting the data into the table, it's just not
repainting itself.
The data method for the table looks like this:
def data(self, index, role):
if not index.isValid():
return QVariant()
elif role == Qt.TextAlignmentRole:
if (index.column() == 0):
return Qt.AlignLeft
return Qt.AlignRight
elif role == Qt.BackgroundColorRole:
symbol = self.arraydata[index.row()][0]
if symbol == "$" :
return QVariant(QColor(0xEE, 0xFF, 0xEE))
shares = self.arraydata[index.row()][1]
if shares == '0' :
return QVariant(QColor('wheat'))
if symbol[0] == '^' :
return QVariant(QColor(0xEE, 0xEE, 0xF5))
if index.row() == len(self.arraydata) - 1 :
return QVariant(QColor('lightgray'))
return QVariant()
elif role == Qt.TextColorRole:
content = self.arraydata[index.row()][index.column()]
if content != 0 and str(content)[0] == '-' :
return QVariant(QColor('red'))
return QVariant()
elif role != Qt.DisplayRole:
return QVariant()
return QVariant(self.arraydata[index.row()][index.column()])
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Try
self.dataChanged.emit(self.createIndex(0, 0),
self.createIndex(self.rowCount(0), self.columnCount(0)))
respectively
self.emit(SIGNAL("DataChanged(QModelIndex,QModelIndex)"),
self.createIndex(0, 0), self.createIndex(self.rowCount(0)),
self.columnCount(0))
in your changeData Method to update all data in your QTableView.
If you change number of rows and/or columns, keep the LayoutChanged()
SIGNALs.
Felix Schmidt
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