return value

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  03 March 2013
return value


I built a little class that builds a window with a textScrollList and two buttons (ok and cancel).
I would like to use this to let the user chose the value of a variable during another procedure, so this window should pop up and then return a value that is used outside the class.
I am still quite new to Classes and probably I am missing something, could someone help me on this?

class NamespaceChooser:
    def __init__(self, *args):

        spacer = 16 = "NamespaceChooser"
        self.title = "Chose namespace"

        # Begin creating the UI
        if (mc.window(, q=1, exists=1)): mc.deleteUI(
        self.window = mc.window(, title=self.title)

        self.form = mc.formLayout()
        self.textScroll = mc.textScrollList( numberOfRows=16, allowMultiSelection=False, append=['cat', 'dog', 'bee', 'horse'])
        self.okButton = mc.button(label='Ok', width=142, command=self.okButton)
        self.cancelButton = mc.button(label='Cancel', width=142, command=self.cancelButton)
        mc.formLayout(  self.form,
                                    (self.textScroll, 'top', spacer),
                                    (self.textScroll, 'left', spacer),
                                    (self.textScroll, 'right', spacer),
                                    (self.cancelButton, 'top', spacer, self.textScroll),
                                    (self.okButton, 'top', spacer, self.textScroll),
                                    (self.okButton, 'left', spacer, self.cancelButton)

        mc.window(self.window, e=1, w=300, h=280)
    def okButton(self, *args):
        myNamespace = mc.textScrollList(self.textScroll, q=True, si=True)
        print myNamespace
        return myNamespace
    def cancelButton(self, *args):
        print False
  03 March 2013
I think you need to use something like one of the modal dialogs so that it forces your calling process to wait for a response. (Sorry if I misunderstood your question). Your class window that you showed above, will sit there, and you could query the last button clicked in various ways, but your process will not wait while you click something.

Within standard maya ui commands you could use the layoutDialog. You'll need to look it up, but it goes something like this

import pymel.core as pm
 from functools import partial
 def my_process():
 	# prompt for something
 	returnCode = pm.layoutDialog(ui=partial(my_dialog, my_arg))
 	# now do something with the return code
 def my_dialog(my_arg):
 	# here is where you can create your layout and buttons
 	# This could be your class
 	parent = pm.setParent(q=True)
       # etc, etc...
       # and somewhere you need a button to dismiss the dialog
 	BTN = pm.button(p=parent)
 	BTN.setCommand(partial(my_dismiss_cmd, 'hello'))
 def my_dismiss_cmd(returnString):

Anyway thats the gist of it. Sorry about the pymel... cmds is probably similar, but I never use it.

  03 March 2013
Thanks David,

You are completely right. I was looking for a modal dialog
I was a little triky to make it work but now seems ok!

Thanks again.

Last edited by nookie : 03 March 2013 at 01:19 PM.
  03 March 2013
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