com.amazonaws.eclipse.ec2.ui.securitygroups.SecurityGroupView.java Source code

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Here is the source code for com.amazonaws.eclipse.ec2.ui.securitygroups.SecurityGroupView.java

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/*
 * Copyright 2008-2011 Amazon Technologies, Inc. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at:
 * 
 *    http://aws.amazon.com/apache2.0
 *
 * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES 
 * OR CONDITIONS OF ANY KIND, either express or implied. See the 
 * License for the specific language governing permissions and 
 * limitations under the License. 
 */

package com.amazonaws.eclipse.ec2.ui.securitygroups;

import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.part.ViewPart;

import com.amazonaws.eclipse.core.preferences.AccountPreferenceChangeRefreshListener;
import com.amazonaws.eclipse.core.preferences.PreferenceChangeRefreshListener;
import com.amazonaws.eclipse.core.regions.DefaultRegionChangeRefreshListener;
import com.amazonaws.eclipse.core.ui.IRefreshable;
import com.amazonaws.eclipse.ec2.ui.StatusBar;

/**
 * View to display security groups and their permission.
 */
public class SecurityGroupView extends ViewPart implements IRefreshable {

    private SecurityGroupSelectionComposite securityGroupSelectionComposite;
    private PermissionsComposite permissionsComposite;

    /**
     * Listener for AWS account preference changes (such as access key or secret
     * access key) that require this view to be refreshed.
     */
    private final PreferenceChangeRefreshListener accountPreferenceChangeRefreshListener = new AccountPreferenceChangeRefreshListener(
            this);

    /**
     * Listener for EC2 preference changes (such as current region) that require
     * this view to be refreshed.
     */
    private final PreferenceChangeRefreshListener ec2PreferenceChangeRefreshListener = new DefaultRegionChangeRefreshListener(
            this);

    /* (non-Javadoc)
     * @see org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
     */
    @Override
    public void createPartControl(Composite parent) {
        GridLayout layout = new GridLayout(1, false);
        layout.marginWidth = 0;
        layout.marginHeight = 0;
        layout.verticalSpacing = 2;
        parent.setLayout(layout);

        StatusBar statusBar = new StatusBar(parent);
        statusBar.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        SashForm sashForm = new SashForm(parent, SWT.HORIZONTAL);
        sashForm.setLayoutData(new GridData(GridData.FILL_BOTH));

        securityGroupSelectionComposite = new SecurityGroupSelectionComposite(sashForm);
        permissionsComposite = new PermissionsComposite(sashForm);

        securityGroupSelectionComposite.setListener(statusBar);

        /*
         * The security group table and the permissions table need to communicate with
         * each other when certain events happen.  It'd be a little nicer to have them
         * isolated from each other with some sort of event/listener, but for now we
         * can simply have them be aware of each other.
         */
        securityGroupSelectionComposite.setPermissionsComposite(permissionsComposite);
        permissionsComposite.setSecurityGroupComposite(securityGroupSelectionComposite);

        sashForm.setWeights(new int[] { 50, 50 });

        securityGroupSelectionComposite.addSelectionListener(new SelectionListener() {
            public void widgetDefaultSelected(SelectionEvent e) {
            }

            public void widgetSelected(SelectionEvent e) {
                permissionsComposite.refreshPermissions();
            }
        });

        contributeToActionBars();
    }

    /*
     * @see org.eclipse.ui.part.WorkbenchPart#dispose()
     */
    @Override
    public void dispose() {
        if (accountPreferenceChangeRefreshListener != null) {
            accountPreferenceChangeRefreshListener.stopListening();
        }

        if (ec2PreferenceChangeRefreshListener != null) {
            ec2PreferenceChangeRefreshListener.stopListening();
        }

        super.dispose();
    }

    private void contributeToActionBars() {
        IActionBars bars = getViewSite().getActionBars();
        fillLocalToolBar(bars.getToolBarManager());
    }

    private void fillLocalToolBar(IToolBarManager manager) {
        manager.add(securityGroupSelectionComposite.getRefreshSecurityGroupsAction());
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.part.WorkbenchPart#setFocus()
     */
    @Override
    public void setFocus() {
    }

    /* (non-Javadoc)
     * @see com.amazonaws.eclipse.ec2.ui.IRefreshable#refreshData()
     */
    public void refreshData() {
        if (securityGroupSelectionComposite != null) {
            securityGroupSelectionComposite.getRefreshSecurityGroupsAction().run();
        }
    }

}