org.dawb.common.ui.image.IconUtils.java Source code

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Here is the source code for org.dawb.common.ui.image.IconUtils.java

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/*
 * Copyright (c) 2012 Diamond Light Source Ltd.
 *
 * 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
 */
package org.dawb.common.ui.image;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.geometry.PointList;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;

public class IconUtils {

    public static ImageDescriptor createIconDescriptor(String iconText) {

        final ImageData data = new ImageData(16, 16, 16, new PaletteData(0x7C00, 0x3E0, 0x1F));
        final Image image = new Image(Display.getCurrent(), data);

        final GC gc = new GC(image);

        gc.setForeground(ColorConstants.white);
        gc.fillRectangle(new Rectangle(0, 0, 16, 16));
        gc.setForeground(ColorConstants.darkGray);
        gc.setFont(new Font(Display.getCurrent(), new FontData("Dialog", 6, SWT.BOLD)));
        gc.drawText(iconText, 4, 2);

        gc.dispose();

        return new ImageDescriptor() {
            @Override
            public ImageData getImageData() {
                return image.getImageData();
            }
        };
    }

    public static ImageDescriptor createPenDescriptor(int penSize) {

        final ImageData data = new ImageData(16, 16, 16, new PaletteData(0x7C00, 0x3E0, 0x1F));
        final Image image = new Image(Display.getCurrent(), data);

        final GC gc = new GC(image);

        gc.setBackground(Display.getDefault().getActiveShell().getBackground());
        gc.fillRectangle(new Rectangle(0, 0, 16, 16));
        gc.setBackground(ColorConstants.gray);
        gc.fillRectangle(2, 2, penSize, penSize);

        gc.dispose();

        return new ImageDescriptor() {
            @Override
            public ImageData getImageData() {
                return image.getImageData();
            }
        };
    }

    /**
     * Icon for the actions to choose brush type.
     * @param size
     * @param shape
     * @param maskRGB
     * @return
     */
    public static ImageDescriptor getBrushIcon(int size, ShapeType shape, RGB maskRGB) {

        if (shape == ShapeType.NONE)
            return null;

        final ImageData data = new ImageData(16, 16, 16, new PaletteData(0x7C00, 0x3E0, 0x1F));
        final Image image = new Image(Display.getCurrent(), data);

        final GC gc = new GC(image);

        if (Display.getDefault() == null)
            return ImageDescriptor.createFromImage(image);
        if (Display.getDefault().getActiveShell() == null)
            return ImageDescriptor.createFromImage(image);
        gc.setBackground(Display.getDefault().getActiveShell().getBackground());
        gc.fillRectangle(new Rectangle(0, 0, 16, 16));
        gc.setForeground(ColorConstants.gray);
        gc.setLineWidth(2);
        if (maskRGB != null) {
            final Color maskColour = new Color(null, maskRGB);
            gc.setBackground(maskColour);
        }
        switch (shape) {
        case SQUARE:
            if (maskRGB != null)
                gc.fillRectangle(2, 2, size, size);
            gc.drawRectangle(2, 2, size, size);
            break;
        case TRIANGLE:
            final PointList pl = new PointList();
            pl.addPoint(2 + (size / 2), 2);
            pl.addPoint(2 + size, 2 + size);
            pl.addPoint(2, 2 + size);
            if (maskRGB != null)
                gc.fillPolygon(pl.toIntArray());
            gc.drawPolygon(pl.toIntArray());
            break;
        case CIRCLE:
            if (maskRGB != null)
                gc.fillOval(2, 2, size, size);
            gc.drawOval(2, 2, size, size);
            break;
        default:
            break;
        }

        gc.dispose();

        return new ImageDescriptor() {
            @Override
            public ImageData getImageData() {
                return image.getImageData();
            }
        };
    }

}