[SOLVED] pyqt4 qtablewidget / select and/or highlight other cells when one is clicked.

sharky · 02-22-2015, 12:19 AM

Using python 2.7.6 and QT 4.8.6
Mint Linux 17.1

Using qtablewidget with 16 rows and 4 colums. Need to automatically select other specific cells in the table when one of the cells is selected.

The row of the selection needs to be selected plus 6 more cells in the column.

Have not found any code examples that select a cell. All examples I have found assume that all selections are made manually.

Any help would be appreciated.

Cheers,

sharky · 02-22-2015, 12:39 PM

Any suggestions would help. To get me started if someone can explain how to simply select a cell would be great.

norobro · 02-22-2015, 02:33 PM

One way to do this is with a delegate. You can highlight items with QItemDelegate.paint().

I cobbled this example together by translating from C++, so TIFWIW:

Code:

#!/usr/bin/python
import sys
from PyQt4.Qt import *

class MyTable(QTableWidget):
    def __init__(self,  *args):
        QTableWidget.__init__(self, *args)
        self.setmydata()
        self.itemSelectionChanged.connect(self.slot)
        self.setItemDelegate(delegate(self))
        
    def slot(self):
        self.viewport().update()
        
    def setmydata(self):
        for row in range(0,16):
            for col in range(0,4):
                newitem = QTableWidgetItem(QString("row %1, col %2").arg(row+1).arg(col+1))
                if row == 0 and col == 0:
                    newitem.setText("click me")
                self.setItem(row, col, newitem)

class delegate(QItemDelegate):                
    def __init__(self,parent):
        super(delegate,self).__init__(parent)
        self.selectionmodel = parent.selectionModel()
        
    def paint(self,painter,option,index):
        if index == index.model().index(12,3) or index == index.model().index(13,1): 
        #if index.row() == 12 and index.column() == 3:
            if self.selectionmodel.isSelected(index.sibling(0,0)):
                painter.fillRect(option.rect, QColor(68, 171, 230))
        painter.drawText(option.rect, Qt.AlignCenter, index.data().toString())

def main(args):
    app = QApplication(args)
    table = MyTable(16, 4)
    table.resize(500,600)
    table.show()
    sys.exit(app.exec_())
    
if __name__=="__main__":
    main(sys.argv)

Hope this helps.

sharky · 02-23-2015, 11:37 AM

This is helpful. Is there also a way to set the other cells to selected?

Regards,

Quote:

Originally Posted by norobro

One way to do this is with a delegate. You can highlight items with QItemDelegate.paint().

I cobbled this example together by translating from C++, so TIFWIW:

Code:

#!/usr/bin/python
import sys
from PyQt4.Qt import *

class MyTable(QTableWidget):
    def __init__(self,  *args):
        QTableWidget.__init__(self, *args)
        self.setmydata()
        self.itemSelectionChanged.connect(self.slot)
        self.setItemDelegate(delegate(self))
        
    def slot(self):
        self.viewport().update()
        
    def setmydata(self):
        for row in range(0,16):
            for col in range(0,4):
                newitem = QTableWidgetItem(QString("row %1, col %2").arg(row+1).arg(col+1))
                if row == 0 and col == 0:
                    newitem.setText("click me")
                self.setItem(row, col, newitem)

class delegate(QItemDelegate):                
    def __init__(self,parent):
        super(delegate,self).__init__(parent)
        self.selectionmodel = parent.selectionModel()
        
    def paint(self,painter,option,index):
        if index == index.model().index(12,3) or index == index.model().index(13,1): 
        #if index.row() == 12 and index.column() == 3:
            if self.selectionmodel.isSelected(index.sibling(0,0)):
                painter.fillRect(option.rect, QColor(68, 171, 230))
        painter.drawText(option.rect, Qt.AlignCenter, index.data().toString())

def main(args):
    app = QApplication(args)
    table = MyTable(16, 4)
    table.resize(500,600)
    table.show()
    sys.exit(app.exec_())
    
if __name__=="__main__":
    main(sys.argv)

Hope this helps.

norobro · 02-23-2015, 12:24 PM

Quote:

Originally Posted by sharky

Is there also a way to set the other cells to selected?

Sure. Make the following change in paint():

Code:

#painter.fillRect(option.rect, QColor(68, 171, 230))
self.selectionmodel.select(index, QItemSelectionModel.Select)