apple script daily change desktop background

I am looking to have the following...

*Applescript change my desktop background

*Have the change done daily (per week)

I tend to look at my screens too long sometimes.

I would just have 7 colors jpgs for the script to run from.


I am not a Apple Script guy... just php.

So I am looking at ways to do this automated on startup.


Thanks!
seawordAsked:
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AGoodKeenManCommented:
In leopard this is available in System Preferences -> Desktop, however I suspect it is not in Tiger, so try the following script. Copy and paste the text below into "Applescript Editor", change the pathToImages variable to where ever your folder of images is and save the script where ever you like. Then in iCal setup a new event and set the alarm to run this script once a day.
-- Applescript to randomly change Desktop picture
-- Note does not check if file is an image
 
set pathToImages to "Library:Desktop Pictures:Nature"
 
tell application "Finder"
	if folder pathToImages of startup disk exists then
		try
			set desktop picture to some file in folder pathToImages of startup disk
		on error
			return 0
		end try
	end if
end tell

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seawordAuthor Commented:
Thanks, i just want to keep it all in action script though....

I use a different day management software for my work.


I was hoping that you might know of an " IF THEN" statement for applescript.

That way the script could just check the OS date and time.

SO I would have conditionals for the time and days.

That way I could edit the file myself.


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AGoodKeenManCommented:
Having an applescript looping all day is not an ideal solution. With ical you can schedule the script to run at a certain time of the day and repeat when ever and as often as you like.
Another idea might be to run the shell script below from a cron job.
You can read more about setting up a cron job here:
http://www.macosxhints.com/article.php?story=2001020700163714
#!/bin/sh -
#
# cron job to run applescript
 
osascript /path/to/script

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seawordAuthor Commented:
The script would only be run once at startup.

i guess a cron job would work as well...


can you give an example of how I could do an IF THEN conditional in applescript?
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AGoodKeenManCommented:
I should have thought of this earlier, you can run a script at login. Just add the script below to the login items for your user account.

You can edit theHours and theMinutes variables to suit your timing requirements. (currently set to 1:30am)


-- Applescript to randomly change Desktop image once a day
-- Does not check if file is an image
 
property lastTimeRun : ""
set pathToImages to "Library:Desktop Pictures:Nature"
set theHours to 1 -- must be less then 24
set theMinutes to 30 -- must be less than 60
 
tell application "Finder"
	set theDate to current date
	
	-- Check if the script has already been run today
	set today to date string of theDate
	if lastTimeRun is not today then
		
		--Check to see if it is time to run the script today
		set currentHours to (hours of (theDate))
		set currentMinutes to (minutes of (theDate))
		if (currentMinutes e theMinutes) and (currentHours e theHours) then
			set lastTimeRun to today
			if folder pathToImages of startup disk exists then
				try
					set desktop picture to some file in folder pathToImages of startup disk
				on error
					return 0
				end try
			end if
		end if
	end if
end tell

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AGoodKeenManCommented:
It looks like line 19 has some encoding problems, replace it with the one below (hopefully).
if (currentMinutes >= theMinutes) and (currentHours >= theHours) then

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seawordAuthor Commented:
Thank you for taking time to help me.

I actually looked into 10.5.6 and the improvements they made to scripting.

The bridge (python / C / JS / ruby) is huge.

Thank again.  
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