net.sf.jmoney.copier.actions.CutSessionAction.java Source code

Introduction

Here is the source code for net.sf.jmoney.copier.actions.CutSessionAction.java

Source

/*
*
*  JMoney - A Personal Finance Manager
*  Copyright (c) 2004 Nigel Westbury <westbury@users.sourceforge.net>
*
*
*  This program is free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  You should have received a copy of the GNU General Public License
*  along with this program; if not, write to the Free Software
*  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/

package net.sf.jmoney.copier.actions;

import net.sf.jmoney.JMoneyPlugin;
import net.sf.jmoney.copier.CopierPlugin;
import net.sf.jmoney.model2.DatastoreManager;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.WorkbenchException;

/**
 * Our sample action implements workbench action delegate.
 * The action proxy will be created by the workbench and
 * shown in the UI. When the user tries to use the action,
 * this delegate will be created and execution will be 
 * delegated to it.
 * @see IWorkbenchWindowActionDelegate
 */
public class CutSessionAction implements IWorkbenchWindowActionDelegate {
    private IWorkbenchWindow window;

    /**
     * The constructor.
     */
    public CutSessionAction() {
    }

    /**
     * The action has been activated. The argument of the
     * method represents the 'real' action sitting
     * in the workbench UI.
     * @see IWorkbenchWindowActionDelegate#run
     */
    public void run(IAction action) {
        DatastoreManager sessionManager = JMoneyPlugin.getDefault().getSessionManager();

        if (sessionManager == null) {
            MessageDialog waitDialog = new MessageDialog(window.getShell(), "Menu item unavailable", null, // accept the default window icon
                    "No session is open.  "
                            + "This action is used to copy session data from one session to another.  "
                            + "You must first use this action to save the contents of the current session.  "
                            + "You must then open another session and then select the 'Paste Contents' action.  "
                            + "The contents of the session will then be copied into the new session.",
                    MessageDialog.ERROR, new String[] { IDialogConstants.OK_LABEL }, 0);
            waitDialog.open();
            return;
        }

        // We call canClose now so that we are sure
        // that we can later close the session without
        // further user input.  If the user does not
        // provide at this time all the information required
        // to close the session then we terminate the operation
        // now.
        if (!sessionManager.canClose(window)) {
            return;
        }

        // Save the session in a static location.
        // The session is left open so that we can
        // later read the data from it.
        CopierPlugin.setSessionManager(sessionManager);

        /*
         * Close this window but leave the session open.
         * 
         * This ensures that the session cannot be closed before
         * it is pasted into the new location.
         */
        // TODO: There is a problem with this.  If the session is
        // never pasted then it is never closed.  Better may be to
        // leave the window open, requiring the user to create a
        // target session in another window, and giving an error if
        // a paste is done after the source session was closed.
        try {
            window.getActivePage().close();
            window.openPage(null);
        } catch (WorkbenchException e) {
            // TODO: Uncomment this when this becomes a handler
            //         throw new ExecutionException("Workbench exception occured while closing window.", e); //$NON-NLS-1$
        }
    }

    /**
     * Selection in the workbench has been changed. We 
     * can change the state of the 'real' action here
     * if we want, but this can only happen after 
     * the delegate has been created.
     * @see IWorkbenchWindowActionDelegate#selectionChanged
     */
    public void selectionChanged(IAction action, ISelection selection) {
    }

    /**
     * We can use this method to dispose of any system
     * resources we previously allocated.
     * @see IWorkbenchWindowActionDelegate#dispose
     */
    public void dispose() {
    }

    /**
     * We will cache window object in order to
     * be able to provide parent shell for the message dialog.
     * @see IWorkbenchWindowActionDelegate#init
     */
    public void init(IWorkbenchWindow window) {
        this.window = window;
    }
}