Ubuntu 11.10 - Show Desktop Keyboard Shortcut

I couldn't find the keyboard shortcut / hotkey for minimising all windows. Turns out it was renamed to "Hide all normal windows". This can be found in Keyboard settings, under the Shortcuts tab.

Ubuntu 10.04 Lucid - notify-send in crontab not working

Alternative title: How to harness Ubuntu's black notification bubbles to set yourself repeating reminders

I recently found the wonderful command notify-send, which you can use to create those black Ubuntu notifications in the top right of the screen e.g. notify-send "Message Title" "This is my message." (you may need to install libnotify-bin). I then tried to shove this in my crontab to remind me to do stuff (e.g. take a short break every hour) but it didn't work.

Turns out that from the crontab, you have to tell it which DISPLAY to use, and luckily this turned out to be quite simply. All you need to do is add this prefix: DISPLAY=:0.0. So my crontab now looks like this:

# m h dom mon dow command
0 * * * * DISPLAY=:0.0 notify-send "Have a break" "Have a Kit Kat"

Ubuntu 10.04 Lucid - Keyboard Shortcut to move window to other monitor (output)

I have a dual-monitor setup, and have always wanted to be able to move a window to another screen using a keyboard shortcut / hotkey. Turns out it is really easy:

CCSM (Compiz Comfig Settings Manager) > Put > Put to next output

I set it to <Ctrl><Alt>Enter

jQuery slideDown() doesn't work on elements with CSS min-height

jQuery v1.6.2

I have an empty div with min-height defined in the CSS. When I use jQuery's slideDown() on it, it doesn't work - the div just instantly appears. Here is the workaround:

var myMinHeight = myElement.css("minHeight");
myElement.css({minHeight: 0}).animate({height: myMinHeight}, "fast", function() {
   $(this).css({minHeight: "", height: ""});
});

First we grab the CSS min-height value. Then we overide it, setting it to 0, and animate our div to the given min-height. At this point, we have what we want, but our CSS is messed up (e.g. say our CSS min-height was originally 120px, now our div will have a fixed height of 120px). This means if we add more content to the div, it cannot grow like we want it to (the very reason we were using min-height in the first place). The solution is simply to reset jQuery's inline style values (see line 3), after which it seamlessly reverts to your original CSS values.


REFERENCES
http://docs.jquery.com/Tutorials:Getting_Around_The_Minimum_Height_Glitch
http://jsfiddle.net/jitter/mLHb9/1/

Google Chrome on Ubuntu 11.04 Natty - Your profile could not be opened correctly

For me this was due to ghost chrome processes still running. Close chrome, and type:

ps aux | grep chrome

I had output like this:

16660 ?        00:00:15 chrome
16666 ?        00:00:00 chrome
16668 ?        00:00:00 chrome
18159 ?        00:00:11 chrome
18165 ?        00:00:00 chrome
18167 ?        00:00:00 chrome

Then kill em all!!! e.g. to kill the first one (process id 16660), type:

kill 16660

Then when you restart chrome, it should be able to load your profile properly again.

Load event for Google Maps Javascript API V3

Use this JavaScript event listener to know when your Google Map finishes initialising.

google.maps.event.addListener(map, 'idle', function() {
   ...
});

REFERENCES
http://code.google.com/p/gmaps-api-issues/issues/detail?id=1516

Android 2.2 Froyo - Only Enable Auto-Sync when Connected to WiFi

I achieved this using an app called Tasker (currently £4).

1) New profile: on the Tasker homepage, click the plus icon to create a new profile, and don't bother entering a name.

2) Choose the context: go State > Net > WiFi Connected and click the green tick icon to confirm.

3) Select task: you then have to create a task to run when this context is active. There should be a "Task Selection" popup, and you need to click New Task, and again you don't need to bother with a name. Then you should be on the Edit Task page. Click the plus icon to add an action > select Net > AutoSync > Select On and accept. Finally, finish the task by clicking the tick icon.

4) Repeat steps 1-3 for the AutoSync Off task i.e. set the context to be WiFi Connected, but then check Invert on the next page, and set the Task to be AutoSync Off.

That's it - your AutoSync should turn on when you connect to a WiFi network, and off again when you disconnect.


Alternative Apps
-Locale (with a plugin) - expensive at over £6
-AutoSync Account Activator - FREE, and looks good (though I haven't tested it), but too fine-grained controls (i.e. must set individual sync rules for each sync account rather than just overall enable/disable Auto-Sync, ALSO must select specific WiFi networks as triggers, rather than just overall "WiFi connected")
-Toggle Settings - FREE, but not very intuitive interface - I gave up quite quickly.

If anyone can figure out how to achieve this behaviour using a free app, then please let me know in the comments!