On Wednesday 07 July 2010 01:50:06 am Mike Turchenkov wrote:
> Hello, thanks a lot for dabo!
>
> Say please should I use a separate bizobj for populating list(and also
> combo and dropdown)box with key-name pairs that are calculated from another
> table?
In general yes. I normally create a bizobj for my lists. There are other
ways - for example if you need to use the same table twice. But from what
I'm reading the other methods will not be needed. Just remember that you
will need a way to retrieve a dataset to populate the list.
>
> As for now, getNamesAndKeys(self) is in Test_TableBizobj.py, DataSource is
> test_table for form and listbox simultaneousely. And when ValueMode = key,
> then I get
>
> File
> "/usr/local/lib64/python2.5/site-packages/Dabo-0.9.2-py2.5.egg/dabo/ui/uiwx
>/dControlItemMixin.py", line 239, in _setKeyValue
> raise ValueError(_("Trying to set %s.Value to these invalid selections:
> %s") % (self.Name, invalidSelections))
> ValueError: Trying to set dComboBox.Value to these invalid selections: [3]
This error is common. What it most like means is you have not accounted for
the default key/string value of the list which is required. I use something
like the below code to populate a list.
def yourChoices(self):
# I requery my bizobj normally a small table
self.bizobj.requery()
# get the data
yourDS = self.bizobj.getDataSet()
#here I insure the default values of None and 0 are in the list
availableChoices=['<None>']
keyChoices=[0]
# now I populate the rest of the list
for row in yourDS:
availableChoices.append(row['name_1'])
keyChoices.append(row['pkid'])
return availableChoices,keyChoices
You can use the above code to directly populate the list control.
Or you can add a class which is a little more advanced:
class YourDropDown(dabo.ui.dDropdownList):
def update(self):
self.removeAll()
#note I'm calling the above form method next
self.Choices,self.Keys = self.Form.yourChoices()
self.super()
Below is my UI code to call my class instance:
mylist=YourDropDown(self, Width = 500, ValueMode = 'key', RegID = 'yourID',
DataSource = "tableName", DataField = "fieldName")
Now bind an event if needed:
mylist.bindEvent(dabo.dEvents.Hit, self._setFeeTime)
I have found that my forms open faster if I create an instance of a class on
Linux.
Johnf
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