Hello,
New PySide user here with an issue that my app/script crashes sometimes when
QTableWidget.clear() is called. It is reproducible but I can't understand why
it crashes when it does.
The script fills the table with data from an array that meet some criteria. I
select a cell/ row and press a button that causes all the data from the
selected row to be written to a file. Then the table is cleared and re-filled
with a new set of data. If I select a certain cell from certain sets, the
crash occurs. But selecting the same cell in other sets doesn't cause the
crash. Selecting a different cell in the same row/ same set as 'crasher
selection' can prevent the crash. Crashes occur perhaps about 2% of the time.
I can't understand why it occurs, but then again I know very little about Qt
and its MVC classes.
Here is some code:
The window:
from PySide import QtCore, QtGui
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayoutWidget = QtGui.QWidget(self.centralwidget)
self.verticalLayoutWidget.setGeometry(QtCore.QRect(170, 20, 160, 80))
self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
self.verticalLayout = QtGui.QVBoxLayout(self.verticalLayoutWidget)
self.verticalLayout.setMargin(0)
self.verticalLayout.setObjectName("verticalLayout")
self.tableWidget = QtGui.QTableWidget(self.centralwidget)
self.tableWidget.setGeometry(QtCore.QRect(10, 110, 781, 451))
self.tableWidget.setObjectName("tableWidget")
self.tableWidget.setColumnCount(0)
self.tableWidget.setRowCount(0)
The app:
def main():
array1 = numpy.loadtxt(open("aa_count.csv"), delimiter=',', dtype={'names'
:('dh', 'ds', 'count' ), 'formats': ('f4', 'f4', 'i4' ) } )
array2 = numpy.loadtxt(open("aa_full.csv"), delimiter=',', dtype={'names'
:('id', 'dh', 'ds', 'name1', 'name2', 'name3', 'name4' ), 'formats': ('i4',
'f4', 'f4', 'S2', 'S2', 'S2', 'S2' ) } )
writer1 = csv.writer(open("aa_prime.csv", "wb"), dialect = 'excel' )
app = QApplication(sys.argv)
frame = MainWindow(dataArray = array2, dataCounts = array1,
outWriter=writer1)
frame.show()
app.exec_()
The Window Class
class MainWindow( QMainWindow, Ui_MainWindow):
def __init__(self, parent= None, dataArray=None, dataCounts = None,
outWriter = None):
super( MainWindow,self).__init__(parent)
self.setupUi(self)
self.outWriter = outWriter
self.dataArray = dataArray
self.dataCounts = dataCounts
self.dataCountRow = 0
self.tableWidget.setColumnCount( 7 )
#filling the table
def showGroup(self):
self.tableWidget.clear()
self.tableWidget.setHorizontalHeaderLabels( self.dataArray.dtype.names
)
dhval = self.dataCounts[self.dataCountRow ] ['dh']
dsval = self.dataCounts[self.dataCountRow ] ['ds']
activeRows = self.dataArray[ (self.dhs == dhval) * (self.dss == dsval)
]
self.rowNumber.setText( str( self.dataCountRow + 1 ) )
irow = 0
for rowX in activeRows:
if not self.filterRow( rowX):
irow += 1
self.tableWidget.setRowCount( irow )
irow = 0
for rowX in activeRows:
if not self.filterRow( rowX):
self.tableWidget.setItem( irow, 0,
QTableWidgetItem(self.tr(str( rowX[0] ))) )
self.tableWidget.setItem( irow, 1,
QTableWidgetItem(self.tr(str( rowX[1] ))) )
self.tableWidget.setItem( irow, 2,
QTableWidgetItem(self.tr(str( rowX[2] ))) )
self.tableWidget.setItem( irow, 3,
QTableWidgetItem(self.tr(str( rowX[3] ))) )
self.tableWidget.setItem( irow, 4,
QTableWidgetItem(self.tr(str( rowX[4] ))) )
self.tableWidget.setItem( irow, 5,
QTableWidgetItem(self.tr(str( rowX[5] ))) )
self.tableWidget.setItem( irow, 6,
QTableWidgetItem(self.tr(str( rowX[6] ))) )
irow += 1
self.tableWidget.setFocus()
#getting the data out of the table
def acceptSelectedRow(self):
import pdb
# pdb.set_trace()
item = self.tableWidget.currentItem()
if item and item.row() >= 0:
rowNum = item.row()
rows = []
for col in xrange(self.tableWidget.columnCount() ):
it = self.tableWidget.item( rowNum, col)
rows.append( it.text() )
if self.outWriter:
self.outWriter.writerow ( rows )
item = None
self.nextGroup()
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