dabo framework dependancies

[Paul McNett]

Peter Decker wrote:
> On 5/22/07, daniel gadenne <daniel.gadenne at caramail.fr> wrote:
> 
>> I'm considering moving over to dabo for wxpython development.
>> However I do not write traditional database applications
>> à la foxpro (I'm a 20 years user of fox...) anymore.
>> Only xml-fed applications.
>>
>> I'm a bit hesitant to jump onboard since dabo seemns to carry
>> over its own lot of database connectivity dependancy.
>>
>> Can you reasonably use dabo for plain datafree application?
> 
> That's exactly how I use it. I write apps that don't use database
> servers, and don't have any database programs installed. I just want
> the dabo.ui stuff, since it makes wxPython so easy to work with.

Dabo has three main modules: db, biz, and ui, and an overarching 
application object. Every class descends from an abstract dObject. For 
database apps, you'd typically set some connection information in the db 
layer, put all your business code in the biz layer, and define your GUI 
in the (you guessed it) ui layer. You can certainly do what Peter has 
done and only use the ui layer and application object. I've done this 
myself and if I ever had to code a non-database UI that's probably what 
I'd do, too. Although I have to admit I can't really picture an 
application that doesn't need to save data. Here's a simple example that 
puts up a textbox:

"""
import dabo
dabo.ui.loadUI("wx")

app = dabo.dApp()
app.setup()

frm = app.MainForm
tb = dabo.ui.dTextBox(frm, Value="Type in here", FontBold=True)

app.start()
"""

You can easily define your own subclasses, too:

"""
import dabo
dabo.ui.loadUI("wx")

class MyRadioList(dabo.ui.dRadioList):
   def initProperties(self):
     self.Choices = ["Snakes", "Bees", "Fishes"]

   def onHit(self, evt):
     print "Radio choice '%s' selected." % self.Value

app = dabo.dApp()
app.setup()
frm = app.MainForm
rl = MyRadioList(frm)
app.start()
"""

So, yes, you can reasonably use Dabo even if you have no traditional 
database in the mix.

-- 
pkm ~ http://paulmcnett.com