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

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

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/*******************************************************************************
 * Copyright (c) 2007, 2010 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 java.net.URL;
import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.internal.p2.ui.ProvUIMessages;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.browser.IWebBrowser;
import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
import org.eclipse.ui.dialogs.PropertyPage;
import org.eclipse.ui.statushandlers.StatusManager;

/**
 * PropertyPage that shows an IU's properties
 * 
 * @since 3.4
 */
public abstract class IUPropertyPage extends PropertyPage {

    protected Control createContents(Composite parent) {
        noDefaultAndApplyButton();
        IInstallableUnit iu = ProvUI.getAdapter(getElement(), IInstallableUnit.class);
        Control control;
        if (iu == null) {
            Label label = new Label(parent, SWT.DEFAULT);
            label.setText(ProvUIMessages.IUPropertyPage_NoIUSelected);
            control = label;
        }
        control = createIUPage(parent, iu);
        Dialog.applyDialogFont(parent);
        return control;
    }

    protected int computeWidthLimit(Control control, int nchars) {
        GC gc = new GC(control);
        gc.setFont(control.getFont());
        FontMetrics fontMetrics = gc.getFontMetrics();
        gc.dispose();
        return Dialog.convertWidthInCharsToPixels(fontMetrics, nchars);
    }

    protected int computeHeightLimit(Control control, int nchars) {
        GC gc = new GC(control);
        gc.setFont(control.getFont());
        FontMetrics fontMetrics = gc.getFontMetrics();
        gc.dispose();
        return Dialog.convertHeightInCharsToPixels(fontMetrics, nchars);
    }

    protected abstract Control createIUPage(Composite parent, IInstallableUnit iu);

    protected void showURL(URL url) {
        IWorkbenchBrowserSupport support = PlatformUI.getWorkbench().getBrowserSupport();
        try {
            IWebBrowser browser = support.getExternalBrowser();
            browser.openURL(url);
        } catch (PartInitException e) {
            ProvUI.handleException(e, ProvUIMessages.IUGeneralInfoPropertyPage_CouldNotOpenBrowser,
                    StatusManager.LOG | StatusManager.BLOCK);
        }
    }
}