Easy firing click event from code in GWT

Firing native events in GWT can be a real pain. If you need to fire a click event when the user press ENTER (or any other key that you want to work like CLICK) on any custom-made element, theoretically you should use:

*DomEvent.fireNativeEvent(com.google.gwt.dom.client.NativeEvent, com.google.gwt.event.shared.HasHandlers) * Minimal code (without required parameters) linked with this approach: NativeEvent event = Document.get().createChangeEvent();
DomEvent.fireNativeEvent(event, this);
public final NativeEvent createClickEvent(int detail, int screenX, int screenY, int clientX, int clientY, boolean ctrlKey, boolean altKey, boolean shiftKey, boolean metaKey) This is the place where native JSNI approach is much more clearer: public static native void click(Element element)/*-{
element.click();
}-*/;

This approach is very useful for custom made buttons that for some reason can not extend basic Button class. In any other case try not to simulate “user actions” in your handlers. Launch designated business methods instead.

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New HTTP Logger Grails plugin

I've wrote a new Grails plugin - httplogger. It logs:

  • request information (url, headers, cookies, method, body),
  • grails dispatch information (controller, action, parameters),
  • response information (elapsed time and body).

It is mostly useful for logging your REST traffic. Full HTTP web pages can be huge to log and generally waste your space. I suggest to map all of your REST controllers with the same path in UrlMappings, e.g. /rest/ and configure this plugin with this path.

Here is some simple output just to give you a taste of it.

17:16:00,331 INFO  filters.LogRawRequestInfoFilter  - 17:16:00,340 INFO  filters.LogRawRequestInfoFilter  - 17:16:00,342 INFO  filters.LogGrailsUrlsInfoFilter  - 17:16:00,731 INFO  filters.LogOutputResponseFilter  - >> #1 returned 200, took 405 ms.
17:16:00,745 INFO filters.LogOutputResponseFilter - >> #1 responded with '{count:0}'
17:18:55,799 INFO  filters.LogRawRequestInfoFilter  - 17:18:55,799 INFO  filters.LogRawRequestInfoFilter  - 17:18:55,800 INFO  filters.LogRawRequestInfoFilter  - 17:18:55,801 INFO  filters.LogOutputResponseFilter  - >> #2 returned 404, took 3 ms.
17:18:55,802 INFO filters.LogOutputResponseFilter - >> #2 responded with ''

Official plugin information can be found on Grails plugins website here: http://grails.org/plugins/httplogger or you can browse code on github: TouK/grails-httplogger.

Cross-platform mobile apps – possible or not?

What is Titanium and how it works. Titanium is an open-source solution for cross-platform, almost-native mobile app development. It has its own MVC, JavaScript and XML-based framework Alloy. Titanium is based on assumption, that each app can be divided into two parts: UI, which is platform-specific part and application core – business logic, common to all […]What is Titanium and how it works. Titanium is an open-source solution for cross-platform, almost-native mobile app development. It has its own MVC, JavaScript and XML-based framework Alloy. Titanium is based on assumption, that each app can be divided into two parts: UI, which is platform-specific part and application core – business logic, common to all […]