Jonathan Saggau's Blog

Some software is, in my experience, not quite WYSIWYG when it comes to the final printed output so I have gotten into the habit of viewing a PDF in preview before I actually send a document to my printer. This has saved many trees.

Apple makes it fairly easy to do this. Just command-P and click on the weird-looking PDF button to get the drop down menu to select "Open PDF In Preview."

I would like to see most every print job automatically open in preview without needing to take my hands off of the keyboard. One can make this happen with a little bit of effort, some help from Folder Actions, and a little piece of free third-party software. Here's how I do it.

First, download and install Cups PDF per the instructions on its home page. This will create a printer and driver that dumps a pdf file into ~/Desktop/cups-pdf/. Set your default printer to CUPS-PDF.

Next, you will setup a folder action on the ~/Desktop/cups-pdf/ to open each file that gets dumped in there in preview. I keep my folder actions scripts in ~/Desktop/Folder\ Actions/, so I put the following applescript (derived from a similar script that ships with Leopard) there.

  
(*
add - new item alert

This Folder Action handler is triggered whenever items are added to the attached folder.

The script will display an alert containing the number of items added and offering the user

the option to reveal the added items in Finder.

Copyright © 2002–2007 Apple Inc.

You may incorporate this Apple sample code into your program(s) without

restriction.  This Apple sample code has been provided "AS IS" and the

responsibility for its operation is yours.  You are not permitted to

redistribute this Apple sample code as "Apple sample code" after having

made changes.  If you're going to redistribute the code, we require

that you make it clear that the code was descended from Apple sample

code, but that you've made changes.

*)

property dialog_timeout : 5 -- set the amount of time before dialogs auto-answer.

on adding folder items to this_folder after receiving added_items

	try

		tell application "Finder"

			--get the name of the folder

			set the folder_name to the name of this_folder

		end tell

		

		-- find out how many new items have been placed in the folder

		set the item_count to the number of items in the added_items

		--create the alert string

		set alert_message to ("Folder Actions Alert:" & return & return) as Unicode text

		if the item_count is greater than 1 then

			set alert_message to alert_message & (the item_count as text) & " new items have "

		else

			set alert_message to alert_message & "One new item has "

		end if

		set alert_message to alert_message & "been placed in folder " & «data utxt201C» & the folder_name & «data utxt201D» & "."

		set the alert_message to (the alert_message & return & return & "Would you like to view the added items?")

		

		display dialog the alert_message buttons {"Yes", "No"} default button 1 with icon 1 giving up after dialog_timeout

		set the user_choice to the button returned of the result

		

		if user_choice is "Yes" then

			tell application "Preview"

				--fire it up

				activate

				--open the items

				open the added_items

			end tell

		end if

	end try

end adding folder items to

Ctrl (or right) click the cups-pdf folder, Enable Folder Actions, then Configure Folder Actions via the contextual menues seen below.

When you select "Configure Folder Actions" you'll set the script that runs every time a new file is added to that folder to the one above.

Now every time you hit command - P to print in a application, you'll hit enter to print to your default CUPS-PDF printer, which will write a PDF to the cups-pdf folder on your desktop. The folder action will then pop-up this window (for five seconds).

All you have to do is hit enter.

So! Every time I print I hit command - P, enter, wait a sec, enter. Instant preview.

Posted by jonmarimba at 02:41 AM | Permalink | Comments (0) | TrackBacks (0)

I need an NSNumberFormatter subclass for a PyObjC project I'm working on that reformats an NSNumber to hours:minutes:seconds. Thinking I've seen this before (and kind of hoping that there was some voodoo I was missing somewhere to make this simple), I decided to poke around in applications that deal with time. After a little head-scratching, I was reminded of that most useful time-tracking and invoicing application I've grown to love called Billable (Zorn!). On this screenshot (from the Clickable Bliss site) we see a field labeled "Time Spent:" with a "Start" button next to it. Thinking to myself, "I want that formatter!" I fired up F-Script Anywhere, injected it into Billable and dug down until I was the class name for the formatter. Time to pray to google. Ah! Zorn! You beautiful helpful coding-type person. You've pasted it for us. Thank you! Now all that is left is to pythonify it. (I made a few modifications to the behavior, but it's the same general idea)

#
#  CBTimeLengthFormatter.py
#  PuppyTracker
#
#  Created by Jonathan Saggau on 12/3/07.
#  Copyright (c) 2007 __MyCompanyName__. All rights reserved.


from Foundation import *
from math import floor

#modified from http://paste.lisp.org/display/21854
class CBTimeLengthFormatter(NSNumberFormatter):

    def stringForObjectValue_(self, anObject):
        if (not (anObject.isKindOfClass_(NSNumber))):
            return(None)
            
        if (anObject.intValue() <= 0):
            return("00:00:00")
        intval = int(floor(anObject))
        
        hours = intval / (60*60)
        minutes = (intval - (hours * 60 * 60)) / 60
        seconds = intval - (minutes * 60) - (hours * 60 * 60)
        string = "%02i:%02i:%02i" %((hours), (minutes), (seconds))
        return(string)
    
    def getObjectValue_forString_errorDescription_(self, objVal, inString, err):
        """Take a string like "00:00:00" and turns it into a NSNumber and returns YES
           Also able to handle 10:10 (as 10 minutes, 10 seconds) and 10 (as 10 seconds)"""
        
        string = NSString.stringWithString_(inString)
        
        #catch for nil or empty string
        if (string == None or string.isEqualToString_("")):
            return True, 0, None
        
        stringList = string.split(":")
        #make seconds first, instead of hours
        stringList.reverse()
        
        #turn each into an integer, filtering out empty strings
        try:
            stringList = [int(each) for each in stringList if each is not u'']
            
        #if we can't make any part of this into an int, bail
        except ValueError, e:
            return False, 0, None
        
        #make sure we have Seconds, Hours, Minutes by padding the list with zeros
        #in case we have (say) Seconds, Hours only
        while ( len(stringList) < 3):
            stringList.append(0)
        
                        #sec            #min               #hour
        timeInSeconds = stringList[0] + stringList[1]*60 + stringList[2]*60*60
        return True, timeInSeconds, None

Posted by jonmarimba at 01:09 PM | Permalink