java - Use ClickHandler with a native Javascript object? -

-

In Javascript, I am creating a SVG shape and adding a click handler to it like this: 

  var rect = document.createElementNS ('http://www.w3.org/2000/svg','rect'); Rect.addEventListener ('Click', myClickHandler, Incorrect);

This works great, I'm trying to create an overlay restore class in GWT. If possible, I would like to do something like this: 

  public class SVGRAct javascript object {public resident Zero AddClickHandler (ClickHandler handler) / * - {addEventListener ('click', handler, false); } - * /; }

In this way I can pass a 'normal' GWT handler to this class, and can use it as a standalone other GWT UI element. I'm not sure how to do the clickhandler object in the implementation of the original Javascript of the object, though how?

Thanks

Because you pass ClickEvent Requires ClickHandler.onClick and it has a problem getting it from JavaScript (AFAICT) - I will go with a slightly different, more "normal" approach:

Create a simple callback interface: 

  public interface callback {void execute (); }

You can pass it directly and call it like this:

{AddEventListener ('click', function () {callback. @ Path.to.your.package.Clallback :: execute () ();}, Incorrect); } - * /;

Or create an intermediate step: 

  Public Zero addClickHandler (callback callback) {_addClickHandler (getCallback (callback)); } Private Original Zero _addClickHandler (JavaScript Object Callback) / * - {addEventListener ('click', callback, wrong); } - * /; // It can be moved to a better location Private Static Javascript Object Mill Callback (Callback Callback) / * - {Return Function () {callback. @ Path.to.your.package.Callback :: execute () (); }; } - * /;

And, of course, you will use it like this: 

  SVGRect svg = getMeSVGRect (); Svg.addClickHandler (new callback () {@Override public void execute () {// some stuff}}); Personally, I like the second solution - when it is more code, I like keeping my original / JSN methods private (unless it is an overlay object or something like this) and the code is more readable and less error prone (There is no need to use the Flickr syntax to call java functions from inside native / jnsani code).

Comments

Post a Comment

Popular posts from this blog

oracle - The fastest way to check if some records in a database table? -

-
I have a big table to work with. I have to see that there are some records whose parent_id is equal to my passing value. Currently I do this by implementing "my_table using select count (*) where parent_id =: id"; If the result> 0, it means that they exist. Because this is a very large table, and I do not care what the actual number of records present, I just want to know if it exists, so I think count (*) Bit is disabled. How do I apply this requirement most quickly? I'm using Oracle 10. # Tips for Hibernation & amp; Tricks It suggests writing in such a way: Integer number = (integer) session .createQuery ("Select Count (*) to ...."). UniqueResult (); I do not know what is the magic of the unique rule? Why does it fast? To compare, select "1 from mytable where parent_id = passId and rowrum", which is more efficient? If you are not interested in the number of records, then there is an EXISTS query one: Select 'y'
Read more

php - multilevel menu with multilevel array -

-
Just ask someone to solve this problem? I want to create a multilevel menu I can not find the right solution generated with multilevel array, it always gets an array_push error My study came from the original idea But still my Can not match the need. This is my MySQL [code] ----- --------------------- --------------- | ID | PARENT_ID | Name | Link | Seq | 1 | 0 | Dashboad | Dashboard / | 1 | 2 | 0 | Menu 1 | Menu 1 / | 2 | 3 | 0 | Menu 2 | Menu 2 / | 3 | 4 | 0 | Menu 3 | Menu 3 / | 4 | 5 | 2 | Joint Add / | 1 | 6 | 3 | Joint Add / | 1 | 7 | 2 | Edit | Edit / | 2 | 8 | 4 | Joint Add / | 1 ------------------------------------------ [/ Code] I want to do something like this in my array array ('dashboard' = & gt; array ('id' = & gt; '' 'Dame' = & gt; 'Dashboard', 'Title' = & gt; 'Dashboard', 'MatchMin' = & gt; Base_URL (). 'Dashboard /', 'Active' => = & Gt; NULL), &
Read more

jQuery UI: Datepicker month format -

-
I am trying to change the format of the month that shows in the popup (not in the date that the picker actually I do not have any choice anywhere to do this, do I like to use a sub-string () or something else? What I normally display is Trying to change: Class = "ui-datepicker-title"> January & lt; / span & gt; ... & lt; / div & gt; Div>
Read more