eclipse plugin - disable menu based on value of a preference variable -

-

i have menu item xyz. have preference page mypref has check box , couple of text fields. when check box in mypref check, want menu xyz enabled else should disabled. there way achieve this.

yes, way exist.

1). create entry in ipreferencestore - class extends abstractuiplugin , following:

ipreferencestore store = iextendabstractuiplugin.getdefault()       .getpreferencestore();

then store value reflect checkbox state:

preferencestore.setvalue("xyzmenupreference", false); // if disabled

or 

preferencestore.setvalue("xyzmenupreference", true); // if enabled

2). create property tester extention plugin.xml:

<extension point="org.eclipse.core.expressions.propertytesters">   <propertytester      class="org.xyz.propertytester"      id="org.xyz.propertytester"      type="java.lang.object"      namespace="org.xyz"      properties="xyzmenu">   </propertytester> </extension>

3). when declaring menu handler in plugin.xml should add following:

<handler  class="your-menu-handler-class"  commandid="your-command-id">      <enabledwhen>      <with variable="selection">                          <test property="org.xyz.xyzmenu" value="true" forcepluginactivation="true"/>       </with>       </enabledwhen>            </handler>

4). need class "org.xyz.propertytester" (as defined in plugin.xml) extend org.eclipse.core.expressions.propertytester , override method test(<some args>) must check property value:

if (property.equals("xyzmenu"){    ipreferencestore store = iextendabstractuiplugin.getdefault()                     .getpreferencestore();    return store.getboolean("xyzmenupreference"); }

5). after add change listener checkbox , use re-evaluate visibility of menu item:

ievaluationservice service = (ievaluationservice) platformui    .getworkbench().getservice(ievaluationservice.class); service.requestevaluation("org.xyz.xyzmenu");

it force method test() org.xyz.propertytester class called , enable menu item if preference "xyzmenupreference" set true.

upd.

namespace - unique id determining name space properties added properties - comma separated list of properties provided property tester

this official eclipse tutorial can feel free define namespace , property name, should use in point 5.


Comments

Post a Comment

Popular posts from this blog

html5 - What is breaking my page when printing? -

-
Image
i have questioner , don't know why when printing it's creating break before first question. live demo (link) i able resolve issue removing fieldset container had wrapped in.. having fieldset element causing of fields grouped together, , since not fit on first page, being pushed second page. removing fieldset element, able firefox print first 2 questions on page 1 identically chrome. it seems not new problem firefox , fieldset not playing nice found old bugzilla ticket 2008 has persisted , still being commented on in 2014 (link) if retaining fieldset important, found solution else came here (link) <script type='text/javascript'> $(window).bind('beforeprint', function(){ $('fieldset').each( function(item) { $(this).replacewith($('<div class="fieldset">' + this.innerhtml + '</div>')); } ) }); $(window).bind(...
Read more

c# - must be a non-abstract type with a public parameterless constructor in redis -

-
when save object, got below error must non-abstract type public parameterless constructor in order use parameter 't' in generic type or method 'servicestack.redis.redisclient.store<t>(t) redisclass.getinstnace().store(msg); // error here redisclass.getinstnace().save(); as third party's class, can not edit how save object? could create wrapper around third party object call constructor, store wrapper? e.g. public class mywrapper { public thirdpartyobject thirdpartyinstance { get; set; } public mywrapper() { thirdpartyinstance = new thirdpartyobject("constructors"); } }
Read more

ajax - PHP/JSON Login script (Twitter style) not setting sessions -

-
i'm having trouble getting twitter style login work properly, reason gets stuck at session_register("useremail"); session_register("userpass"); and doesn't redirect after it. if enter wrong account data, works , appropriate error message pops up. this full code: <?php if(empty($_post['email']) || empty($_post['password'])) { die(msg(0,"all fields required")); } if(!(preg_match("/^[\.a-z0-9_\-\+]+[@][a-z0-9_\-]+([.][a-z0-9_\-]+)+[a-z]{1,4}$/", $_post['email']))) die(msg(0,"you haven't provided valid e-mail")); $host="localhost"; $username="root"; $password="x"; $db_name="x"; $tbl_name="x"; mysql_connect("$host", "$username", "$password")or die("cannot connect"); mysql_select_db("$db_name")or die("cannot select db"); $useremail=$_post['email']; $userpass=...
Read more