java - Eclipse plugin: menu button greyed out -


i'm trying create simple eclipse button based on org.eclipse.ui.commands, org.eclipse.ui.menus , org.eclipse.ui.handlers

but when debugging, button created greyed out: http://i.stack.imgur.com/rnpbz.png

here plugin.xml , loginhandler.java

plugin.xml

<?xml version="1.0" encoding="utf-8"?> <?eclipse version="3.4"?> <plugin>     <extension          point="org.eclipse.ui.views">       <category             name="server browsing"             id="com.abc.serverapi">       </category>       <view             name="server browser"             icon="icons/sample.gif"             category="com.abc.serverapi"             class="com.abc.serverapi.views.serverbrowser"             id="com.abc.serverapi.views.serverbrowser">       </view>    </extension>    <extension          point="org.eclipse.ui.perspectiveextensions">       <perspectiveextension             targetid="org.eclipse.jdt.ui.javaperspective">          <view                ratio="0.5"                relative="org.eclipse.ui.views.problemview"                relationship="right"                id="com.abc.serverapi.views.serverbrowser">          </view>       </perspectiveextension>    </extension>    <extension          point="org.eclipse.help.contexts">       <contexts             file="contexts.xml">       </contexts>    </extension>    <extension          point="org.eclipse.ui.commands">       <command             id="com.abc.serverapi.command.login"             name="open server login">       </command>    </extension>    <extension          point="org.eclipse.ui.handlers">       <handler             class="com.abc.serverapi.handler.loginhandler"             commandid="com.abc.serverapi.command.login">       </handler>    </extension>    <extension          point="org.eclipse.ui.menus">       <menucontribution             allpopups="false"             locationuri="menu:org.eclipse.ui.main.menu">          <menu                id="com.abc.serverapi.menu.login"                label="server login menu">             <command                   commandid="com.abc.serverapi.command.login"                   icon="icons/sample.gif"                   id="com.abc.serverapi.menu.openlogindialog"                   mnemonic="o"                   style="push">             </command>          </menu>       </menucontribution>    </extension>  </plugin>

and here command handler:

package com.abc.serverapi.handler;  import org.eclipse.core.commands.executionevent; import org.eclipse.core.commands.executionexception; import org.eclipse.core.commands.ihandler; import org.eclipse.core.commands.ihandlerlistener; import org.eclipse.jface.dialogs.messagedialog; import org.eclipse.ui.iworkbenchwindow; import org.eclipse.ui.handlers.handlerutil;  public class loginhandler implements ihandler {      @override     public void addhandlerlistener(ihandlerlistener handlerlistener) {         // todo auto-generated method stub      }      @override     public void dispose() {         // todo auto-generated method stub      }      @override     public object execute(executionevent event) throws executionexception {         iworkbenchwindow window = handlerutil.getactiveworkbenchwindowchecked(event);         messagedialog.openinformation(                 window.getshell(),                 "test",                 "hello, eclipse world");         return null;     }      @override     public boolean isenabled() {         // todo auto-generated method stub         return false;     }      @override     public boolean ishandled() {         // todo auto-generated method stub         return false;     }      @override     public void removehandlerlistener(ihandlerlistener handlerlistener) {         // todo auto-generated method stub      }  }

your isenabled() method in handler returning false - handler not enabled!

you can extend org.eclipse.core.commands.abstracthandler rather implementing of ihandler.


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