Interactions

Happy New Year!

2012-01-10T20:47:00.001+01:00

Happy New Year to all readers of the blog! As I started this blog my originally idea was to write about the technologies I play around when I have some free time. Reading my posts you may realize that this is actually more GWT (Google Web Toolkit) blog that something else. I like to play with this technology and I will try to keep writing posts regarding GWT also during the new 2012 year, so

Custom GWT clickable cell with multiple images for CellTable

2011-11-04T10:39:00.001+01:00

I wrote already similar article here, which describes very well how to use images into custom created cell. Also there is a very nice tutorial describing how to create custom cells you can read from the official GWT documentation here. I’ve been asked from a visitor the my blog about use case where we do have more then one images into the custom cell and then he wants to know which image was

AbstractSafeHtmlCell and the events, for dummies

2011-10-26T19:15:00.001+02:00

I was playing around the possibility to extend AbstractSafeHtmlCell and create custom cell again, now with the GWT 2.4 and had a funny beginner problem. The issue was that I wanted to override the onBrowserEvent to handle click events. Everything was looking really good, but when I click on a cell into the custom column nothing happens. So I was hacking around to find out the problem without to

GWT Development with Activities and Places

2011-08-26T08:00:00.000+02:00

In GWT 2.1 the activities and places were introduced to allow you to use the browser history management. In the following versions this features where improved. I prepared this example already months ago but due to lack of time I was not able to post it until now. On the end of the article you will find a link with the source code! What is the use case? I have the following layout: This layout

Building GWT applications with JDeveloper

2011-08-11T12:49:00.001+02:00

I just post a article here about how to build GWT application using JDeveloper. This is just a start of set of topics I would like to post in the next weeks or months, so if you interested just take a look and let me know what you think. Also I plan to past some articles about building JSR-286 portlets using GWT as for the UI. So have a look and as usual I am always open for comments, questions

Using GWT configuration properties

2011-08-08T15:48:00.001+02:00

One of the commenters to the blog here bring me to the nice idea to use configuration properties to configure the linker instead of sub classing the linker. I found the idea very nice and decide to play around this feature. I did this example just to demonstrate what you can do to extend the linker, which I created in my previously articles to be able to use properties as well. First thing you

Blog feeds issue fixed

2011-07-28T09:02:00.001+02:00

First thank you very much to all of you subscribed to this blog. I had some problems with the feeds and there were not working properly in the last 2 months, but know looks like the issue is fixed! There are two links now which you can use, the old one: http://feeds.feedburner.com/TheE20Blog and now there is a new one: http://feeds.feedburner.com/blogspot/gGRuP The old one link will still work

Writing GWT Linker for offline applications – issues

2011-07-27T07:28:00.000+02:00

I was very surprised by the number of users visiting my last post regarding the GWT Linker which allows you to compile application manifest for offline support. There are also some issues reported, thank you very much about the feedbacks. Now I will try to keep it short, there is issue when you compile your application using the linker from my post HERE and then you run the application and open

Writing GWT Linker for offline applications – part 2

2011-06-30T11:09:00.001+02:00

NOTE: This article follows my previously post about linkers, which you can find HERE. It is really sad that there is not enough documentation about the GWT Linkers. It is a very powerful feature and gives you a lot of possibility, I do hope that in the next documentation this will change. As I tried to extend my linker, I found also some example into the GWT Code on the current trunk. I was very

GWT RPC + Apache Jackrabbit + OCM – extended example

2011-06-23T08:28:00.000+02:00

In my previously article, I wrote about how to pass Apache Jackrabbit OCM and pass the nodes to the client side. It works really well, so I wanted to go for more extended example, for example using some collections or aggregation like shown in the OCM example page. Very briefly overview of what you should do to get all this to work: NOTE: Read this article to see how I set-up the project fist.

GWT and Apache Jackrabbit JCR Object Content Mapping

2011-06-03T07:22:00.000+02:00

I was playing with Java Content Repository and Apache Jackrabbit and also some examples for Oracle UCM and JCR and since I work a lot with GWT in the last project I thought, why not using GWT with Jackrabbit OCM. There were not really examples in Internet about but several open source projects are using GWT and Apache Jackrabbit together. I wasn’t able to see pure implementation, something like

Writing GWT Linker for offline applications – part 1

2011-05-17T17:00:00.001+02:00

I was looking after the latest GWT 2.3 and I wanted to experiment with the local storage HTML5 features. It looks good but what would be more interesting if you can make your GWT application to work offline. Looking in internet for some documentation I realized that to make my GWT runs offline I may need to write a custom linker. So why actually linker? Basically first you do need to understand

Cool sites and tools for web-fans

2011-05-15T17:30:00.001+02:00

I suppose you also search in internet for new sites and tools you can use to support your work as web developer and make live easier or just to get faster to the point. In the last weeks I was looking for a tool which will allow me to fast sketch design, mockups and wireframes. I found very good one, which really works good for me. The name of the software is Balsamiq. It is very simple to work

GWT UiBinder.useSafeHtmlTemplates warning on compiling

2011-05-04T17:05:00.002+02:00

I just update to the GWT 2.3 version and every time I compile my project I get this error message: 1 [WARN] Configuration property UiBinder.useSafeHtmlTemplates is false! UiBinder SafeHtml integration is off, leaving your users more vulnerable to cross-site scripting attacks. This property will default to true in future releases of GWT. I start to hate that message so I check in internet but

Using GWT Menu Widget with UiBinder Templates

2011-04-07T20:54:00.001+02:00

Ok, we know how the MenuBar and the MenuItems are working normally but what about if I want to use them into my UiBinder Template. First step will be to create the UiBinder Template with MenuBar and the MenuItems you which. After you finish this step you should assign the ui:field to your MenuItem (s). This will allow us to attach the commands. After you finish your UiBinder should look similar

GWT Eclipse Plugin Update to version 2.2.1

2011-04-04T19:07:00.001+02:00

I was playing with some GWT examples today and the Eclipse alert me that there is a new update of the GWT Plugin to version 2.2.1. What was interesting that there is also update for the GWT SDK, just a new build as you can see from the screenshots bellow. Before: After the update: The new plugin version fixes some issues like for example the work with the UiBinders highlighting, but I wasn’t

Get UCM Folders and Content Items using CIS API

2011-04-01T18:33:00.000+02:00

You know one of this issues, it is very simple but you don't have it on top of your head and you have to look into the documentation for how to do it. Even if it's well documented it takes time and you just want to have a code snipped and use it into your application. One of this issues for example is reading the folders and the content items (documents) from UCM, when I develop some custom

Using GWT DockLayoutPanel in Model-View-Presenter custom activities

2011-04-01T18:28:00.000+02:00

Most of the MVP GWT examples are made using SimplePanel. In case you want to create something more complicated using the GWT 2.x layout system the simple panel will not work and you will get problems developing an designing your layouts. In my case I wanted to use the DockLayoutPanel and as I mention I wasn’t able to work with it. The problem was very simple to solve, you have to take care of the

GWT Browser Plugin offline installation

2011-03-25T11:02:00.001+01:00

In many cases you will be not able to install the GWT browser plugin from internet. For example if you work in company using some proxy to connect to internet. In most of the cases this affects the GWT IE plugin. Normally when you try to open the GWT development mode link, if the browser does not have the GWT Plugin installed, it shows a link where you can download the plugin. If for some reason

GWT: Passing by value or by reference!

2011-03-22T12:19:00.001+01:00

Maybe very common problem but most of the developers may forget about this developing with GWT. We know that the GWT client code will be compiled to JavaScript, HTML and so on but how the object references are handled. I made some examples and basically, what is best practice for Java is also best practice when you develop GWT. On JavaScript side you do have the same problem depending on if you

Custom GWT Clickable Cell with images

2011-03-20T20:14:00.001+01:00

Few days ago I had to create a custom clickable cell for the CellTable. The issue was to create a cell which shows file names together with the appropriated icon. For example, if we have a *.doc file then we should show also the icon of the file, the same also for excel or pdf files. It should look like this: How to proceed with this issue? I found the answer in some of the GWT examples and also

Configure OpenDS for Replication

2011-02-28T21:12:00.001+01:00

I was configuring OpenDS for an customer and was very surprise how easy is to configure replications for it. Basically we do have Master and Slave machine. The Slave machine will be the one where the data will be replicated. Regarding the OpenDS documentation you can configure the replication when you install your OpenDS LDAP Server but you can do it also when you have two separated stand-alone

Oracle UCM GET_SEARCH_RESULTS service with full text search

2011-02-17T19:38:00.000+01:00

Newly I was working on portlet which should be able to do full text search through the UCM documents and I was experimenting with the RIDC and also with the CIS API's. There are some ticks you may take care of, for example using quotes is a very special case and most of situations UCM will throw an exception if you not use them well. During my tests I was able to develop one solution which works

GWT 2.2 Released

2011-02-14T19:39:00.001+01:00

Very fast after the post I made last week, Google released the next version of GWT 2.2. What is interesting into this version is the new Google Plugin for Eclipse. It does have integrated lightweight version of the GWT Designer inside and works very well. I’ve just tested some functionalities, looks really promising and works very fast for me: Since this a lightweight version there are several

GWT 2.2 with column sorting CellTable

2011-02-10T21:24:00.002+01:00

Few weeks ago a posted an example how to make a sortable column in CellTable. Looking into the framework documentation, I found that there are some new features documented, which will be released in the next GWT version 2.2. This new documented features are Column Sorting and Controlling Column Widths. The CellTable will have build-in support for column sorting. When you call Column.setSortable(