Clean PyQt selection comboBox

MRAB python at mrabarnett.plus.com
Thu Nov 5 16:37:49 CET 2009


Threader Slash wrote:
> Hello Everybody, 8)
> 
> I am using Qt and need to build a selection comboBox -- e.g.:
> http://www.java2s.com/Tutorial/VBImages/ComboBoxSelectionEventAddValue.PNG .
> 
> The problem is - after one choice was made, and the code run, for the 
> next time the user select a different choice, both, the present and all 
> past choices run. See what I mean: ;(
> 
> Code:
> 
> selected color - blue
> we are on runBlue
> 
> selected color - red
> we are on runBlue
> we are on runRed
> 
> 
> Here is the code:
> 
> .........................................
> QtCore.QObject.connect(self.selectComboBox, 
> 			QtCore.SIGNAL("currentIndexChanged(QString)"), 
> 			self.combo_activateInput)   
> .........................................
> 
> def combo_activateInput(self):
>         color=unicode(self.selectComboBox.currentText())
>         if(color == "blue"):
>             print "selected color - blue"
>             QtCore.QObject.connect(self.okButton, QtCore.SIGNAL("clicked()"), self.combo_runBlue)
> 
>         if(color == "red"):
>             print "selected color - red"
>             QtCore.QObject.connect(self.okButton, QtCore.SIGNAL("clicked()"), self.combo_runRed)               
>         if(color == "yellow"):
> 
>             print "selected color - yellow"
>             QtCore.QObject.connect(self.okButton, QtCore.SIGNAL("clicked()"), self.combo_runYellow)
>         del color 
> .........................................
> 
> def combo_runBlue(self):
>         print "we are on runBlue"
> 
> def combo_runRed(self):
>         print "we are on runRed"
> 
> def combo_runYellow(self):
>         print "we are on runYellow"
> 
> I run "del color" to clean the content returned by 
> selectComboBox.currentText, but it didn't clean the content indeed.
> 
"del color" doesn't "clean the content", it just says "forget this
name", in this case "forget the local variable called 'color'".

> So, any suggestion? All comments and suggestions are highly appreciated. 
> :D :D :D
> 
The ".connect" method connects something each time it's called. If you
call it multiple times then multiple things will be connected.

Try using ".disconnect" to disconnect what you no longer want connected.



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