McLeran Consulting LLC

Pros and Cons gets great review

2010-07-27T05:06:00.001-07:00

Check out the pros and cons review:

http://www.theiphoneappreview.com/07/pros-and-cons-your-iphone-decision-maker/

2010-06-19T08:25:00.000-07:00

Furious George 1.1 is available on the iTunes app store: http://itunes.apple.com/us/app/furious-george/id330076612?mt=8

Furious George 1.1 adds a feature where you can shake your iPhone/iPod Touch to make George extra furious. Earn more points for defending yourself against his poo and hitting him with weapons.

ProsAndCons Available

2010-06-03T13:59:00.001-07:00

ProsAndCons is now available on the iTunes App Store. ProsAndCons is a utility to help you make a decision about whether or not to take an action. You enter an action title and then process to enter weighted pros and cons. Touch the equals button to have the app calculate the end result. The app will display a plus-sign if the pros outweigh the cons and a minus sign if the cons outweigh the pros. It will display a question mark if the pros and cons are equal.

Tkinter tip

2010-05-04T08:57:00.000-07:00

If you're like me, you have struggled with Tkinter's Key event handler in that the consequences of the event have not yet happened when your code is executing within the handler. I dealt with it by delaying my response to the Key event using root.after(delay, handler). A small example:

import Tkinter

from Tkinter import *

root = Tk()

class GUI(object):
    def __init__(self, root):
        self.root = root

        self.entryStringVar = StringVar()
        self.entry = Entry(root, textvariable = self.entryStringVar)
        self.entry.grid(row = 0, column = 0, sticky = N + S + E + W)
        self.entry.bind("", self.key)

        self.button = Button(root, text = 'Test')
        self.button.configure(state = DISABLED)
        self.button.grid(row = 1, column = 0, sticky = N + S + E + W)

    def key(self, event):
        if len(self.entryStringVar.get()) > 0:
            self.button.configure(state = NORMAL)
        else:
            self.button.configure(state = DISABLED)

gui = GUI(root)
root.mainloop()

The above code will create a simple GUI which is always one key press behind in terms of the Button's enabled state. After 1 key press, the Button is not enabled because the length of the textvariable has not yet changed:

The solution is to use root.after. I have changed the code to the new implementation below and now the button behaves as desired:

import Tkinter

from Tkinter import *

root = Tk()

class GUI(object):
    def __init__(self, root):
        self.root = root

        self.entryStringVar = StringVar()
        self.entry = Entry(root, textvariable = self.entryStringVar)
        self.entry.grid(row = 0, column = 0, sticky = N + S + E + W)
        self.entry.bind("", self.key)

        self.button = Button(root, text = 'Test')
        self.button.configure(state = DISABLED)
        self.button.grid(row = 1, column = 0, sticky = N + S + E + W)

    def key(self, event):
        self.root.after(1, self.setButtonStatus)

    def setButtonStatus(self):
        if len(self.entryStringVar.get()) > 0:
            self.button.configure(state = NORMAL)
        else:
            self.button.configure(state = DISABLED)

gui = GUI(root)
root.mainloop()

Now when the 1st key is pressed, the key event handler delays the setting of the Button's status for 1 ms to allow the key event to be fully processed before checking the textvariable's length:

Hope you find this tip helpful.

Regards,

Dan McLeran

Furious George Demo Video

2009-09-22T22:44:00.000-07:00

Furous George

2009-09-21T19:37:00.000-07:00

Furious George is now available on the iTunes app store!
http://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/browserRedirect?url=itms%253A%252F%252Fax.itunes.apple.com%252FWebObjects%252FMZStore.woa%252Fwa%252FviewSoftware%253Fid%253D330076612%2526mt%253D8

Furious George Release Date Upcoming

2009-08-31T10:08:00.003-07:00

Furious George will be released for the iPhone and iPod Touch soon....