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I want have a context menu (right-click) that allows to toggle different states of the clicked object.

In the plugin.xml, I already have a popup menu with commands entries such as:

<command
   commandId="...switchDistanceCommand"
   label="30s"
   style="toggle">
      <parameter
         name="...switchDistanceMillis"
         value="30000">
      </parameter>
</command>

and a command:

<extension
        point="org.eclipse.ui.commands">
     <command
           id="....switchDistanceCommand"
           name="Switch Distance">
           <commandParameter
                 id="....switchDistanceMillis"
                 name="Seconds"
                 optional="false">
           </commandParameter>
     </command>
</extension>

The handler:

<handler
       class="....SwitchDistanceHandler"
       commandId="....switchDistanceCommand">
</handler>

The handler class SwitchDistanceHandler checks which objects are selected an calls a method on them to switch their state (adding or removing the parametrized value to a List).

So far so good...

However, I want to have my menu entries work as checkboxes (as style="toggle") indicates. Every tutorial on this issue (such as this one) explains how to add a state to command by adding the following code to the plugin.xml:

<state 
     class="org.eclipse.ui.handlers.RegistryToggleState:true" 
     id="org.eclipse.ui.commands.toggleState"> 
</state>

But this will only give me only one global state for this command, I want to read the state(s) from the clicked objects? How can I do this?

Edit 1: Copied the wrong code snipped from the tutorial. Also I tried to implement an own class that extends the State class (as RegistryToggleState does). But I could not figure out how to return a state from this class.

Edit 2: I found a workaround. It does not solve the proposed problem but it works for me.

moe
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1 Answers1

0

Workaround

This is not exactly a solution to the problem because it does not use any state objects. But it works fine for me: Following the advice from this question I implemented IElementUpdater in my Handler. In the updateElement method, I fetched the selected element(s) from the element object and called element.setChecked()accordingly.

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moe
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