org.eclipse.equinox.internal.p2.ui.dialogs.InstalledIUGroup.java Source code

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Here is the source code for org.eclipse.equinox.internal.p2.ui.dialogs.InstalledIUGroup.java

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/*******************************************************************************
 *  Copyright (c) 2007, 2011 IBM Corporation and others.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 * 
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.equinox.internal.p2.ui.dialogs;

import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.internal.p2.ui.ProvUIProvisioningListener;
import org.eclipse.equinox.internal.p2.ui.model.ProfileElement;
import org.eclipse.equinox.internal.p2.ui.viewers.*;
import org.eclipse.equinox.p2.ui.ProvisioningUI;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.widgets.*;

/**
 * An InstalledIUGroup is a reusable UI component that displays the
 * IU's in a given profile.
 * 
 * @since 3.4
 */
public class InstalledIUGroup extends StructuredIUGroup {

    private String profileId;

    /**
     * Create a group that represents the installed IU's.
     * 
     * @param parent the parent composite for the group
     * @param font The font to use for calculating pixel sizes.  This font is
     * not managed by the receiver.
     * @param profileId the id of the profile whose content is being shown.
     * @param columnConfig the columns to be shown
     */
    public InstalledIUGroup(ProvisioningUI ui, final Composite parent, Font font, String profileId,
            IUColumnConfig[] columnConfig) {
        super(ui, parent, font, columnConfig);
        if (profileId == null)
            this.profileId = ui.getProfileId();
        else
            this.profileId = profileId;
        createGroupComposite(parent);
    }

    protected StructuredViewer createViewer(Composite parent) {
        // Table of installed IU's
        TreeViewer installedIUViewer = new TreeViewer(parent,
                SWT.MULTI | SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);

        // Filters and sorters before establishing content, so we don't refresh unnecessarily.
        IUComparator comparator = new IUComparator(IUComparator.IU_NAME);
        comparator.useColumnConfig(getColumnConfig());
        installedIUViewer.setComparator(comparator);
        installedIUViewer.setComparer(new ProvElementComparer());

        // Now the content.
        installedIUViewer.setContentProvider(new DeferredQueryContentProvider());

        // Now the visuals, columns before labels.
        setTreeColumns(installedIUViewer.getTree());
        installedIUViewer.setLabelProvider(new IUDetailsLabelProvider(null, getColumnConfig(), null));

        // Input last.
        installedIUViewer.setInput(getInput());

        final StructuredViewerProvisioningListener listener = new StructuredViewerProvisioningListener(
                getClass().getName(), installedIUViewer,
                ProvUIProvisioningListener.PROV_EVENT_IU | ProvUIProvisioningListener.PROV_EVENT_PROFILE,
                getProvisioningUI().getOperationRunner());
        ProvUI.getProvisioningEventBus(getProvisioningUI().getSession()).addListener(listener);
        installedIUViewer.getControl().addDisposeListener(new DisposeListener() {
            public void widgetDisposed(DisposeEvent e) {
                ProvUI.getProvisioningEventBus(getProvisioningUI().getSession()).removeListener(listener);
            }
        });
        return installedIUViewer;
    }

    private void setTreeColumns(Tree tree) {
        IUColumnConfig[] columns = getColumnConfig();
        tree.setHeaderVisible(true);

        for (int i = 0; i < columns.length; i++) {
            TreeColumn tc = new TreeColumn(tree, SWT.NONE, i);
            tc.setResizable(true);
            tc.setText(columns[i].getColumnTitle());
            tc.setWidth(columns[i].getWidthInPixels(tree));
        }
    }

    Object getInput() {
        ProfileElement element = new ProfileElement(null, profileId);
        return element;
    }

    /**
     * Get the viewer used to represent the installed IU's
     */
    public StructuredViewer getStructuredViewer() {
        return super.getStructuredViewer();
    }

    public Control getDefaultFocusControl() {
        return super.getDefaultFocusControl();
    }
}