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Input validation - decoration / visual feedback - howto [message #1049212]

Thu, 25 April 2013 10:10

Eclipse User

The RAP Examples Demo includes input fields with ClientScripting, giving what it describes as 'visual feedback' on fields:

http://rap.eclipsesource.com/rapdemo/examples#input

Note how the "digits only" example gives you an orange background and also a small red 'X' graphic on its top left.

Could someone please explain (better, give an example), on how the 'X' graphic is provided?
Is this done in JavaScript with ClientScripting, or is that image put in by explicit logic (with a Label widget) on the RAP server side using Java code?

Thanks, John

[Updated on: Thu, 25 April 2013 10:11] by Moderator

Re: Input validation - decoration / visual feedback - howto [message #1049812 is a reply to message #1049212]

Fri, 26 April 2013 05:51

Eclipse User

Hi

> Is this done in JavaScript with ClientScripting, or is that image put in
> by explicit logic (with a Label widget) on the RAP server side?

The examples on the "input"[1] page are Java-only, see here[2], line 108.

On the "validation" page [3] we also use ClientScripting for faster
feedback, except on the first field. Find the Java
(ValidationExamplePage.java) and JavaScript code here[4].

You can also import the Examples demo from your target platform[5] to
view the code, but the bundle with the "validation" page is in the
ClientScripting repository[6].

To show that decorator by ClientScripting is not possible in 2.0
(without dirty tricks), but probably will be in 2.1. (The issue is that
the script can only access the widget that fires the event.)

Hope that helps :-)

Greetings,
Tim

[1] http://rap.eclipsesource.com/rapdemo/examples#input
[2]
http://git.eclipse.org/c/rap/org.eclipse.rap.git/tree/examples/org.eclipse.rap.examples.pages/src/org/eclipse/rap/examples/pages/InputExamplePage.java?id=2.0.0-R-20130205
[3] http://rap.eclipsesource.com/rapdemo/examples#validation
[4]
http://git.eclipse.org/c/rap/incubator/org.eclipse.rap.incubator.clientscripting.git/tree/bundles/org.eclipse.rap.demo.clientscripting/src/org/eclipse/rap/demo/clientscripting/internal
[5]
http://eclipse.org/rap/developers-guide/devguide.php?topic=examples.html&version=2.0
[6] http://eclipse.org/rap/incubator/
--
Tim Buschtöns

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

Re: Input validation - decoration / visual feedback - howto [message #1049886 is a reply to message #1049812]

Fri, 26 April 2013 08:02

Eclipse User

Thanks Tim.
Java-only is good - I wasn't aware of the jface.fieldassist ControlDecoration and FieldDecoration classes, so I think you've pointed me in the right direction.
I cannot get it working in my own application, but it is most likely just me doing something silly... I shall persevere.
Everything builds and runs ok, but I just don't see the images appear... must be me I guess...
Cheers, John

Re: Input validation - decoration / visual feedback - howto [message #1051861 is a reply to message #1049886]

Mon, 29 April 2013 05:48

Eclipse User

Once again, thanks Tim, all is working now, with custom decorations in SWT and RAP.
I just wonder when Tabris will support them... do you happen to know, or shall I ask on their Forum?
Cheers, John

Re: Input validation - decoration / visual feedback - howto [message #1051943 is a reply to message #1051861]

Mon, 29 April 2013 08:02

Eclipse User

Hi.

> I just wonder when Tabris will support them... do you happen to know, or
> shall I ask on their Forum?

It's currently not planned, but feel free to open a feature request:
https://github.com/eclipsesource/tabris/issues

Greetings,
Tim

--
Tim Buschtöns

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

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