A problem using the slider control (posible duplicate email)

"Sommer, Chuck" <[email protected]> Mon, 20 Apr 2009 10:56:21 -0400

Newsgroups	gmane.comp.python.pythoncard
Message-ID	<[email protected]>

I have created a Python-Card application that uses a Spinner and a Slider to control the same value.  When I update the Spinner, I want the Slider updated, and when I update the Slider I want the spinner updated.  

My first attempt to synchronize these 2 objects resulted in something that when I worked the slider, the slider never released the mouse and I had to kill the application.  I modified the slider to send a "command" and I now have a working program.

In the broken version I used the event
    def on_gainPotSlider2_mouseUp(self,event):

In the working version I use the command
    def on_sliderAction_command(self,event):


This example, on startup prior to any PythonCard code executing,
uses the console input to decide which version of the program to run.

So gang, what did I do wrong the first time?

Thanks Chuck

Chuck Sommer
Insight Technology Inc.
[email protected]
Tel: 603-551-6283
Cell: 603-234-2306
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spinner_slider.rsrc.py (application/octet-stream, 736 B)

{'application':{'type':'Application',
          'name':'Template',
    'backgrounds': [
    {'type':'Background',
          'name':'bgTemplate',
          'title':'Standard Template with no menus',
          'size':(400, 300),

         'components': [

{'type':'Slider', 
    'name':'gainPotSlider2', 
    'position':(17, 43), 
    'command':u'sliderAction', 
    'labels':False, 
    'layout':'horizontal', 
    'max':255, 
    'min':0, 
    'tickFrequency':0, 
    'ticks':False, 
    'value':0, 
    },

{'type':'Spinner', 
    'name':'gainPotSpinner1', 
    'position':(10, 10), 
    'max':255, 
    'min':0, 
    'value':0, 
    },

] # end components
} # end background
] # end backgrounds
} }

spinner_slider.py (application/octet-stream, 2.3 KB)

#!/usr/bin/python

"""
__version__ = "$Revision: 1.3 $"
__date__ = "$Date: 2004/04/14 02:38:47 $"
"""

from PythonCard import model

class MyBackground(model.Background):

    def on_initialize(self, event):
        # if you have any initialization
        # including sizer setup, do it here
        self.potVal = 80
        self.components.gainPotSpinner1.value = self.potVal
        self.components.gainPotSlider2.value = self.potVal
        pass

    # when the text in the spinner is updated, 
    #      update the value of self.potVal and
    #      update the slider and redraw it
    def on_gainPotSpinner1_textUpdate(self, event):
        self.potVal = self.components.gainPotSpinner1.value
        self.components.gainPotSlider2.value = self.potVal
        self.components.gainPotSlider2.redraw()


class MyBackground_mouseUp(MyBackground):
    '''Example that uses the mouseUp event on gainPotSlider2
        to update self.Val and the gainPotSpinner1'''
    # when the mouse is released in the spinner is released, 
    #      update the value of self.potVal and
    #      update the spinner and redraw it
    def on_gainPotSlider2_mouseUp(self,event):
        self.potVal = self.components.gainPotSlider2.value
        self.components.gainPotSpinner1.value = self.potVal
        self.components.gainPotSpinner1.redraw()


class MyBackground_sliderAction_command(MyBackground):
    '''Example that uses the command ("sliderAction") of gainPotSlider2
        to update self.Val and the gainPotSpinner1'''
    # when the slider has an action (command)
    #      update the value of self.potVal and
    #      update the spinner and redraw it
    def on_sliderAction_command(self,event):
        self.potVal = self.components.gainPotSlider2.value
        self.components.gainPotSpinner1.value = self.potVal
        self.components.gainPotSpinner1.redraw()


if __name__ == '__main__':
    myInputString = raw_input('''
         1 = broken example (all others = working example)  ? ''')
    if((len(myInputString) > 0) and (myInputString[0] == '1')):
        print "executing the broken example"
        app = model.Application(MyBackground_mouseUp)
    else:
        print "executing the fixed example"
        app = model.Application(MyBackground_sliderAction_command)

    app.MainLoop()