Eclipse plugin : disable/enable dynamically an action from main menubar



I have implemented a eclipse plugin (on indigo, 3.7.2) that provide a new icon in the bar menu.

This new action is fully initialized few seconds after eclipse startup (some configuration files are loaded from my maven repository).

I'm trying to disable this action until my activator finish initalization.

<strong>What I'm looking for</strong>

Before initialization

<img src="https://i.stack.imgur.com/xPdSH.png" alt="Disabled">

After initialization

<img src="https://i.stack.imgur.com/Vspof.png" alt="Enabled">

<strong>What I've already done</strong>

I added an enablement test on my action. My action will be enabled only if my plugin is activated.

<extension point="org.eclipse.ui.actionSets"> <actionSet label="Action Set" visible="true" id="com.eclipse.plugins.extarcheytpe.actionSet"> <action class="com.eclipse.plugins.extarchetype.actions.ShortcutsAction" icon="src/main/resources/icons/generic_box_16x16.png" id="com.eclipse.plugins.extarcheytpe.actions.ShortcutsAction" label="Shortcuts List" style="pulldown" toolbarPath="Shortcuts" tooltip="Shortcuts"> <enablement> <pluginState id="com.eclipse.plugins.extarchetype" value="activated"> </pluginState> </enablement> </action> </actionSet> </extension> [...] <extension point="org.eclipse.ui.startup"> <startup class="com.eclipse.plugins.extarchetype.Startup"> </startup> </extension>

I defined a startup class, where ignite() method initialize my plugin configuration :

public class Startup implements org.eclipse.ui.IStartup{ @Override public void earlyStartup() { try { Activator.getDefault().ignite(); Activator.getDefault().setChanged(); Activator.getDefault().notifyObservers(); } catch (Exception e) { e.printStackTrace(); } } }

I implemented an observing design pattern between my action and my activator (to notify the initialization end).

public class ShortcutsAction extends Action implements IWorkbenchWindowPulldownDelegate, IMenuCreator, IObserver { private IAction action; private Menu menu; public boolean enabled = false; public ShortcutsAction() { super(); Activator.getDefault().addObserver(this); } @Override public void selectionChanged(IAction action, ISelection selection) { // Change action object instance at first selection if (action != this.action) { this.action = action; } // If property enabled is true, enable this action if (enabled) { action.setEnabled(true); } else { action.setEnabled(false); } } [...] @Override public void update(IObservable obs, Object obj) { this.enabled = true; ConsoleHandler.logInfo("Shortcut enabled"); action.setEnabled(true); } }


I got what I was looking for :

<ol> <li>At loading, my action is disabled</li> <li>Since my plugin is initialized, my action is enabled</li> </ol>

Thank you.


<objectState> and <objectClass> test the state and class of the currently selected objects <strong>not</strong> the action handler class.

I think you would have to use <systemProperty> to check a property that you set. Or use the selectionChanged method to enable the IAction.

The selectionChanged method is part of the IActionDelegate interface that you are indirectly implementing with IWorkbenchWindowPulldownDelegate:

public void selectionChanged(IAction action, ISelection selection)

The action parameter is the actual action, call action.setEnabled(true) to enable the action.


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