Topic: Create checkboxes with loop? • RoboFont

This topic contains 5 replies, has 3 voices, and was last updated by frederik 7 years, 4 months ago.

Viewing 6 posts - 1 through 6 (of 6 total)

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June 12, 2013 at 12:37 #5570
Philipp
Participant
Hi,

this may be a basic Python-class question.

I´m trying to show a basic window with multiple checkboxes in it. Which works fine, when I add them manually with their own attribute (?). (Example: https://gist.github.com/axani/5764824 )

But when I try to create multiple checkboxes with a loop I get an Assertion Error, because “self.w.checkbox = …” is used repeatedly.
```
AssertionError: can't replace vanilla attribute
```
So how can I build “self.w.checkbox1 =…”, “self.w.checkbox2 = …”, etc. via a loop?
June 12, 2013 at 13:40 #5572
joanca
Participant
Probably there’s a better way of doing this, but at least, in the meantime, this works:
) sorry I don’t know how to format code properly in the forum :(
```
from vanilla import *
 
class checkboxWindow:
    
    def __init__(self):
        
        self.w = Window((400,400), 'SetOrganizer')
        
        for n in range(5):
        
            exec("self.w.checkBox%s = CheckBox((10, 10 + (25*n+1), -10, -10), 'Label', callback=self.checkBoxCallback, value=True)" % (n))
        
        self.w.open()
    
    def checkBoxCallback(self, sender):
        print sender.get(), sender.getTitle()
 
checkboxWindow()
```
June 12, 2013 at 14:40 #5577
frederik
Keymaster
a better way is to use setattr
```
for i in range(10):
    checkboxObject = Checkbox((10, 10, 10+30*i, 22), "label %s" % i)
    setattr(self.w, "checkBox_%s" % i, checkboxObject)
```
June 12, 2013 at 15:18 #5580
Philipp
Participant
joanca, frederik, thanks for your fast answers!

joancas suggestion works. Though I read often that
```
exec()
```
might be dangerous to use. Unfortunately I get an NameError with frederiks variant:
```
NameError: global name 'Checkbox' is not defined
```
This is my current code:
```
from vanilla import *

class setOrganizer():

    def __init__(self):
        self.w = Window((400,400), 'checkBoxWindow')
        
        for i in range(10):
            checkboxObject = Checkbox((10, 10, 10+30*i, 22), "label %s" % i)
            setattr(self.w, "checkBox_%s" % i, checkboxObject)

        self.w.open()
        
setOrganizer()
```
June 12, 2013 at 17:04 #5582

Philipp
Participant

Boing!

My mistake was a typo: It´s CheckBox, not Checkbox … Ah, the joys of programming!

Thanks for your help! :-)

June 12, 2013 at 21:04 #5583

frederik
Keymaster

sorry, its indeed CheckBox
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