[Kde-java] Questions about KCommandHistory

[Maik Schulz]

Hi all,

I'm trying to use KCommands in my application to allow for undo/redo 
operations. However, I'm not getting very far when I follow the directions 
from the API documentation:

1. KCommands don't get executed automatically when I add them to the 
KCommandHistory
2. The undo/redo items in the edit menu remain unchanged, i.e. deactivated


Could someone please point out to me what I'm doing wrong? I included the 
relevant code snippets at the end of this email.

Thanks in advance,
-Maik

This is my KApplication class:

public class PJBoxManagerApp extends KMainWindow {
	PJBoxManagerApp() {
		super( null, "PJBox Manager" );
		m_view = new PJBoxManagerView(this);
		[...]
		setCentralWidget(m_view);
		[...]
	}
}

And here is the class for the central widget:

//frmWidget has been generated by juic and extends QWidget
public class PJBoxManagerView extends frmWidget {
	KCommandHistory commandHistory;

	public PJBoxManagerView(QWidget parent) {
		super(parent);
		[...]
		commandHistory = new 
KCommandHistory(((KMainWindow)parent).actionCollection(), true);
		[...]
	}

	//this is a method that handles a user action
	public void editRemove() {
		KCommand command = new RemoveNode(tr("Remove Node"), this);

		//setting the execute parameter to true doesn't help
		commandHistory.addCommand(command);

		//I have to manually call execute, otherwise it isn't even executed
		command.execute();
	}
}

And here is the Command class:

public class RemoveNode extends KCommand {
	private PJBoxManagerView controller;
	private String name;

	public RemoveNode(String name, PJBoxManagerView controller) {
		super(RemoveNode.class);
		this.name = name;
		this.controller = controller;
	}

	public String name() {
		return name;
	}
	
	public void execute() {
		System.out.println("execute " + name);
	}
	
	public void unexecute() {
		System.out.println("unexecute " + name);
	}
}