[PyQt] QComboBox and QVariant in pyqt4 ?

[Ingmar Steen]

On Nov 7, 2007 5:07 PM, alteo_gange <romanocaldoni at free.fr> wrote:
> Hi,
>
> I try to include an personal identify (or key) in ComboBox items. I've thought
> to use QVariant:
>
> ------------------------------------
>
> #!/usr/bin/python
> # -*- coding: Utf-8 -*-
>
> import sys
> from PyQt4.QtGui import *
> from PyQt4.QtCore import *
>
> class Widget(QWidget):
>         def __init__(self):
>                 QWidget.__init__(self)
>
>                 hbox=QHBoxLayout()
>                 combo = QComboBox()
>                 lst=[("a",0),("b",1),("c",2),("d",3),("e",4)]
>                 for i in lst:
>                         combo.addItem(i[0],QVariant(i[1]))
>                 hbox.addWidget(combo)
>                 self.connect(combo,SIGNAL("activated(QString, QVariant"),self.changeItem)
>                 self.setLayout(hbox)
>
>         def changeItem(self,i,j):
>                 print i,j
>
> app = QApplication(sys.argv)
> main = Widget()
> main.show()
> sys.exit(app.exec_())
>
> -------------------------------------
>
> But it doesn't work. changeItem() is never called because of the
> signal "activated(QString, QVariant)".
>
> QComboBox and QVariant in pyqt4: Is this possible?
>
> --
> alteo_gange

Hi

You can use the activated(int) signal instead and then look up the
userdata with QComboBox.itemData(int).

#!/usr/bin/python
# -*- coding: Utf-8 -*-

import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *

class Widget(QWidget):
       def __init__(self):
               QWidget.__init__(self)

               hbox=QHBoxLayout()
               self.combo = combo = QComboBox()
               lst=[("a",0),("b",1),("c",2),("d",3),("e",4)]
               for i in lst:
                       combo.addItem(i[0],QVariant(i[1]))
               hbox.addWidget(combo)
               self.connect(combo,SIGNAL("activated(int)"),self.changeItem)
               self.setLayout(hbox)

       def changeItem(self,i):
               print self.combo.itemData(i).toInt()[0]

app = QApplication(sys.argv)
main = Widget()
main.show()
sys.exit(app.exec_())

Ingmar