Feeds

How to hack a Sony Reader

Inside the Linux-based e-book viewer

Reducing security risks from open source software

More tweaks

You’re not limited to simply altering the text that appears on some of the screens - you can actually add additional functions, though this is where things start to become somewhat less straightforward.

For a simple tweak, look at the applicationStart.xml file. You’ll see definitions near the top for the different keys, for example:

<string key="6" do="doDigit" />

for the non-numeric keys, there are entries such as:

<boolean key="0x27" do="doCenter"/>
<boolean key="0x27-hold" do="doCenter"/>

Assigning a global built-in function to one of these keys is achieved by changing the value of the do parameter. A popular tweak uses the long press on the centre of the navigation button to shut the Reader down, though you could equally choose to use it to much the audio. Just change the do= value to doDeviceShutdown or doMute if you prefer.

More complex customisations tend to rely on adding extra code in the main.xml file. Look through, and you’ll see that there’s a group tag for the different screens, as for the About screen that we tinkered with earlier. The <code> tag allows you to define specific functions for that page, each within its own <function> tag.

Look, for example, at the PAGE_GROUP, where you’ll find a function with the id “pageChanged” which updates the bottom of the screen with the current page of the current book. A similar function is found in menus.

And another popular hack adds a clock to the bottom of the screen. A call to this.shd_clock() is added at the bottom of “pageChanged”. Then, a new function shd_clock is defined, using a function tag, which starts like this:

<function id="shd_clock"><![CDATA[
var time = new Date();
var show = "";

It goes on to checks the preferences for clock display, and shows the time in the appropriate format, each time the page is changed. A companion function on the About screen uses the 0 key to toggle the clock display between off, 12 and 24 hour. It begins by using doDigit, then checking if the 0 key was pressed, and setting a preferences option appropriately.

Securing Web Applications Made Simple and Scalable

More from The Register

next story
Child diagnosed as allergic to iPad
Apple's fondleslab is the tablet dermatitis sufferers won't want to take
Microsoft takes on Chromebook with low-cost Windows laptops
Redmond's chief salesman: We're taking 'hard' decisions
For Lenovo US, 8-inch Windows tablets are DEAD – long live 8-inch Windows tablets
Reports it's killing off smaller slabs are greatly exaggerated
Cheer up, Nokia fans. It can start making mobes again in 18 months
The real winner of the Nokia sale is *drumroll* ... Nokia
Seventh-gen SPARC silicon will accelerate Oracle databases
Uncle Larry's mutually-optimised stack to become clearer in August
EU dons gloves, pokes Google's deals with Android mobe makers
El Reg cops a squint at investigatory letters
prev story

Whitepapers

Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.