org.eclipse.equinox.internal.p2.ui.discovery.wizards.DiscoveryResources.java Source code

Introduction

Here is the source code for org.eclipse.equinox.internal.p2.ui.discovery.wizards.DiscoveryResources.java

Source

/*******************************************************************************
 * Copyright (c) 2010 Tasktop Technologies 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:
 *     Tasktop Technologies - initial API and implementation
 *******************************************************************************/

package org.eclipse.equinox.internal.p2.ui.discovery.wizards;

import java.net.URL;
import org.eclipse.equinox.internal.p2.discovery.AbstractCatalogSource;
import org.eclipse.equinox.internal.p2.discovery.model.Icon;
import org.eclipse.equinox.internal.p2.ui.discovery.DiscoveryImages;
import org.eclipse.equinox.internal.p2.ui.discovery.DiscoveryUi;
import org.eclipse.jface.resource.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.Display;

/**
 * @author Steffen Pingel
 */
public class DiscoveryResources {

    private final ResourceManager resourceManager;

    private final FontDescriptor h1FontDescriptor;

    private final Display display;

    private final FontDescriptor h2FontDescriptor;

    private final RGB disabledColorDescriptor;

    public DiscoveryResources(Display display) {
        this.display = display;
        this.resourceManager = new LocalResourceManager(JFaceResources.getResources(display));
        this.h1FontDescriptor = createFontDescriptor(SWT.BOLD, 1.35f);
        this.h2FontDescriptor = createFontDescriptor(SWT.BOLD, 1.25f);
        this.disabledColorDescriptor = new RGB(0x69, 0x69, 0x69);
    }

    public Cursor getHandCursor() {
        return display.getSystemCursor(SWT.CURSOR_HAND);
    }

    private FontDescriptor createFontDescriptor(int style, float heightMultiplier) {
        Font baseFont = JFaceResources.getDialogFont();
        FontData[] fontData = baseFont.getFontData();
        FontData[] newFontData = new FontData[fontData.length];
        for (int i = 0; i < newFontData.length; i++) {
            newFontData[i] = new FontData(fontData[i].getName(), (int) (fontData[i].getHeight() * heightMultiplier),
                    fontData[i].getStyle() | style);
        }
        return FontDescriptor.createFrom(newFontData);
    }

    public void dispose() {
        resourceManager.dispose();
    }

    public Font getHeaderFont() {
        return resourceManager.createFont(h1FontDescriptor);
    }

    public Font getSmallHeaderFont() {
        return resourceManager.createFont(h2FontDescriptor);
    }

    public Image getInfoImage() {
        return resourceManager.createImage(DiscoveryImages.MESSAGE_INFO);
    }

    public Image getIconImage(AbstractCatalogSource discoverySource, Icon icon, int dimension, boolean fallback) {
        String imagePath;
        switch (dimension) {
        case 64:
            imagePath = icon.getImage64();
            if (imagePath != null || !fallback) {
                break;
            }
        case 48:
            imagePath = icon.getImage48();
            if (imagePath != null || !fallback) {
                break;
            }
        case 32:
            imagePath = icon.getImage32();
            break;
        default:
            throw new IllegalArgumentException();
        }
        if (imagePath != null && imagePath.length() > 0) {
            URL resource = discoverySource.getResource(imagePath);
            if (resource != null) {
                ImageDescriptor descriptor = ImageDescriptor.createFromURL(resource);
                return resourceManager.createImage(descriptor);
            }
        }
        return null;
    }

    public Color getGradientBeginColor() {
        return DiscoveryUi.getCommonsColors().getGradientBegin();
    }

    public Color getGradientEndColor() {
        return DiscoveryUi.getCommonsColors().getGradientEnd();
    }

    public Color getColorDisabled() {
        return resourceManager.createColor(disabledColorDescriptor);
    }

    public Image getUpdateImage() {
        return resourceManager.createImage(DiscoveryImages.IU_UPDATABLE);
    }

}