How to Remove Ctrl+L Key Binding from Pidgin

Posted October 27th, 2012 in Uncategorized
Removed 'Clear Scrollback' shortcut

Removed ‘Clear Scrollback’ shortcut

This would have to be far and away the most annoying ‘feature’ of Pidgin.

In just about every web browser, Ctrl+L is used to highlight the URL bar allowing easy navigation via the keyboard. In pidgin it’s used to clear the scrollback of the active window. As a web developer I’m always hitting Ctrl+L in the browser however every now and then I won’t take notice to which window is active on my desktop at the time and use it while Pidgin is active, clearing out the conversation I’m having with my contact at the time. Frustrating!

There was a bug post here about it but as usual the devs don’t particularly care and instead just pointed to their FAQ page. For convenience here’s how you remove the shortcut:

Open ~/.purple/accels and change

; (gtk_accel_path "<PurpleMain>/Tools/Preferences" "<Primary>p")

to

(gtk_accel_path "<main>/Conversation/Clear Scrollback" "")

Remember to remove the semicolon at the start of the line!

 

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Updating your Banner Slideshows Module

Posted September 3rd, 2012 in Lemonstand

One week from this post I will be publishing an update for my Banner Slideshows module for LemonStand which upgrades it to use the newly released Nivoslider 3. This will provide a few nice benefits however the implementation isn’t completely backwards compatible so your frontend code may need updating. Details inside.

What do I need to do?

Simply press the Update slideshow button on your slideshow page in the Administration:

Hit the update button indicated above

Hit the update button indicated above

Then remove your existing slideshow code on your sites frontend and follow the instructions on the marketplace page (to be updated when the module update is released) to add the new version.

How does this benefit me?

The biggest benefit is its new responsive design which resizes with your browser – making it easier to build sites that scale from a desktop monitor all the way down to a mobile phone. I’ve whipped up a live demo to see this feature in action. Open it up and resize your browser window. Notice the slideshow resizes with the window.

Also new in this version of the module is full HTML support for slide descriptions:

HTML support for slide descriptions

HTML support for slide descriptions

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Creating your first LemonStand Widget

Posted August 22nd, 2012 (Updated 1 Sep 2012) in Lemonstand

Creating custom widgets with the Widgets module for Lemonstand is a quick and painless process. Below, I’ll describe how to build a widget for Lemonstands Contact module. I’ll call this module Simple Contact Widget.

Download the completed module from my GitHub repo.

While this tutorial will go over everything you need to do to build a complete and working module, it would be very beneficial to also know the basics of module development, naming conventions and so on. Take a look at the documentation Developing LemonStand Modules if you haven’t already done so.

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Add Chrome Web Store Style Vertical Scroll Boxes To Your Site

Posted July 2nd, 2012 in Javascript

I really like the Chrome web store vertical scroll box functionality so figured I’d write up a tutorial post on how to add them to your site.

Demo

Hover over the boxes below.

Read on for the code!

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How to move WPMU domains

Posted May 31st, 2012 in Database, PHP

Here’s a very quick set of SQL snippets for updating a WPMU domain. This might be useful when building a site on a development domain before moving to a production one later on.

Firstly update the wp_blogs table:

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UPDATE wp_blogs SET domain='newdomain.com';

There will be a bunch of wp_options and wp_posts tables – one per site. Find all the tables:

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SHOW TABLES LIKE "%_options";
SHOW TABLES LIKE "%_posts";

and for each table, perform the following query:

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#_options tables
UPDATE <tablename> SET option_value=REPLACE(option_value, 'http://olddomain.com', 'http://newdomain.com');
#_posts tables
UPDATE <tablename> SET post_content=REPLACE(post_content, 'http://olddomain.com', 'http://newdomain.com');

This was enough to get the sites working for me. Additional tweaks are probably required afterwards – if you find anything let me know in the comments below.

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An Introduction to the HTML5 Pointer Lock and FullScreen APIs

Posted May 12th, 2012 in Javascript

Preface: These APIs are still quite new and subject to change. As of the time of writing, the following tutorial works in Chrome 18.0.1025.168. Firefox 12 supports full screen but not mouse lock.

I’ve been having a little play with some HTML5 features and worked up an example of Pointer Lock and Full Screen APIs. As it stands at the moment, pointer lock is tightly coupled with full screen, so you won’t be able to use it without first loading up full screen mode.

You’ll need to enable Enable Pointer Lock in about:flags in Chrome then restart the browser for mouse lock to work.

You may request full screen mode like so:

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element.requestFullScreen =
	element.requestFullScreen    ||
	element.mozRequestFullScreen ||
	element.webkitRequestFullScreen;
 
element.requestFullScreen(element.ALLOW_KEYBOARD_INPUT);

Once in full screen mode, pointer lock should become available:

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navigator.pointer = navigator.pointer || navigator.webkitPointer;
navigator.pointer.lock(element,
	function() {
		console.log('Pointer lock');
	},
	function() {
		console.log('No pointer lock');
	}
);

Note in the above two scripts, element is a DOM element

Check out the working demo here. I’ve also added some JS to determine the direction the locked pointer is travelling and output the data to the screen. View page source for details.

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Remove a PPA and roll back changes in Debian

Posted May 10th, 2012 in Linux

If you’re a Ubuntu user, you may be familiar with ppa-purge. It’s a handy little automated script to remove a PPA and roll back the version of any apps installed from that PPA. Debian doesn’t have this nicety by default but there’s a relatively simple way to get something close.

Firstly, remove your PPA from /etc/apt/sources.list or from the /etc/apt/sources.list.d/ directory.

Do an update:

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sudo apt-get update

Find any packages that are now obsolete:

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aptitude search '?obsolete'

For me this returned the following:

# aptitude search '?obsolete'
i A libmysqlclient18      - MySQL database client library                                                                           
i A mysql-client-5.5      - MySQL database client binaries                                                                          
i A mysql-server-5.5      - MySQL database server binaries and system database setup                                                
i A mysql-server-core-5.5 - MySQL database server binaries                                                                          
i A ruby-passenger        - Rails and Rack support for Apache2 and Nginx

Now just remove the listed packages with apt-get remove and reinstall as necessary. It’s not quite the automated tool that ppa-purge is, but it’s a pretty good start.

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A few handy Exim commands

Posted May 9th, 2012 in Linux

I’ve been getting alot of frozen messages with Exim and needed to find out what they were so figured I’d document a few handy commands for doing so:

List messages in queue:

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exim -bp

Show message header/body:

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exim -Mvh <id> #For header
exim -Mvb <id> #For body

Delete all messages in queue:

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exim -bp | exiqgrep -i | xargs exim -Mrm

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How to add an application to the ‘Other Applications’ list in Ubuntu

Posted May 6th, 2012 (Updated 9 May 2012) in Linux

It seems Gnome 3 removed the button allowing users to add specified applications into the ‘Other Applications’ list under ‘Open With’ in file properties. Until the functionality is restored, you can add applications manually by doing the below:

cp /usr/share/applications/gedit.desktop ~/.local/share/applications/your_app.desktop

Modify the contents of your_app.deskop to look something like the below:

[Desktop Entry]
Name=your_app
GenericName=Your App
Comment=Edit text files
Keywords=Plaintext;Write;
Exec=your_app %U
Terminal=false
Type=Application
StartupNotify=true
MimeType=text/plain;
Icon=accessories-text-editor
Categories=GNOME;GTK;Utility;TextEditor;
Actions=Window;Document;
X-Ubuntu-Gettext-Domain=your_app

You can copy any .desktop file from /usr/share/applications so pick the one that closest resembles the application you’re adding. Below you can see komodo added to mine:

Komodo has been added to my 'Open With' list
Komodo has been added to my ‘Open With’ list

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Change default ‘From’ email name from www-data in PHP

Posted April 19th, 2012 (Updated 22 Apr 2012) in Linux, PHP

I’ve been seeing up an Amazon EC-2 server with Debian Squeeze and used tasksel to install Web Server and Mail Server. Like all things debian, this worked pretty well after the installation completed and everything ‘just worked’ however I wasn’t happy with the default from name and email address assigned to emails sent by PHP – www-data <[email protected]>.

I discovered a quick and simple fix to change these defaults for all mail sent with PHP:

Open /etc/php5/apache2/php.ini and set

sendmail_path = '/usr/sbin/sendmail -t -i [email protected] -Fno-reply'

You can see a list of sendmail arguments and what they do here.

Restart apache and you’re good to go:

sudo service apache2 restart

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