com.bdaum.zoom.ui.internal.widgets.PSWTSectionBreak.java Source code

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Here is the source code for com.bdaum.zoom.ui.internal.widgets.PSWTSectionBreak.java

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/*
 * This file is part of the ZoRa project: http://www.photozora.org.
 *
 * ZoRa is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * ZoRa is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ZoRa; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * (c) 2009 Berthold Daum  
 */

package com.bdaum.zoom.ui.internal.widgets;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.TextLayout;
import org.eclipse.swt.graphics.TextStyle;
import org.eclipse.swt.graphics.Transform;
import org.eclipse.swt.widgets.Display;
import org.piccolo2d.extras.swt.PSWTCanvas;

import com.bdaum.zoom.cat.model.group.slideShow.SlideImpl;
import com.bdaum.zoom.core.Constants;

public class PSWTSectionBreak extends ZPSWTImage {

    private static final long serialVersionUID = -5539327360971870974L;
    private final SlideImpl slide;
    private final PSWTCanvas canvas;

    public PSWTSectionBreak(PSWTCanvas canvas, SlideImpl slide) {
        super(canvas, createSectionImage(canvas, slide));
        this.canvas = canvas;
        this.slide = slide;
    }

    private static Image createSectionImage(PSWTCanvas canvas, SlideImpl slide) {
        Display display = canvas.getDisplay();
        Rectangle bounds = display.getPrimaryMonitor().getBounds();
        int mx = Math.max(bounds.width, bounds.height);
        double fac = 640d / mx;
        int w = (int) (bounds.width * fac);
        int h = (int) (bounds.height * fac);
        Image image = new Image(display, w, h);
        int tw, th, tx, ty;
        int iw, ih, ix, iy;
        switch (slide.getLayout()) {
        case Constants.SLIDE_THUMBNAILS_LEFT:
            tw = w * 4 / 10;
            th = h * 8 / 10;
            tx = w / 2;
            ty = h / 10;
            iw = w * 3 / 10;
            ih = th;
            ix = w / 10;
            iy = ty;
            break;
        case Constants.SLIDE_THUMBNAILS_RIGHT:
            tw = w * 4 / 10;
            th = h * 8 / 10;
            tx = w / 10;
            ty = h / 10;
            iw = w * 3 / 10;
            ih = th;
            ix = w * 6 / 10;
            iy = ty;
            break;
        case Constants.SLIDE_THUMBNAILS_TOP:
            tw = w * 8 / 10;
            th = h * 4 / 10;
            tx = w / 10;
            ty = h / 2;
            iw = tw;
            ih = h * 3 / 10;
            ix = tx;
            iy = h / 10;
            break;
        case Constants.SLIDE_THUMBNAILS_BOTTOM:
            tw = w * 8 / 10;
            th = h * 4 / 10;
            tx = w / 10;
            ty = h / 10;
            iw = tw;
            ih = h * 3 / 10;
            ix = tx;
            iy = h * 6 / 10;
            break;
        default:
            tw = w * 8 / 10;
            th = h * 8 / 10;
            tx = w / 10;
            ty = h / 10;
            iw = ih = ix = iy = 0;
            break;
        }
        GC gc = new GC(image);
        gc.setBackground(canvas.getBackground());
        gc.fillRectangle(0, 0, w, h);
        gc.setLineWidth(3);
        gc.setForeground(canvas.getForeground());
        gc.drawRectangle(0, 0, w - 1, h - 1);
        TextLayout layout = new TextLayout(display);
        StringBuilder sb = new StringBuilder();
        if (slide.getCaption() != null)
            sb.append(slide.getCaption());
        int boldLength = sb.length();
        if (slide.getDescription() != null && !slide.getDescription().isEmpty()) {
            if (sb.length() > 0)
                sb.append("\n\n"); //$NON-NLS-1$
            sb.append(slide.getDescription());
        }
        layout.setText(sb.toString());
        layout.setStyle(new TextStyle(JFaceResources.getBannerFont(), null, null), 0, boldLength);
        layout.setWidth(tw);
        Rectangle b = layout.getBounds();
        float f = Math.max(0.1f, (float) Math.sqrt((float) b.height / th));
        layout.setWidth((int) (tw * f));
        b = layout.getBounds();
        f = 1f / Math.max((float) b.height / th, (float) b.width / tw);
        Transform t = new Transform(display);
        t.translate(tx, ty);
        t.scale(f, f);
        gc.setTransform(t);
        layout.draw(gc, 0, 0);
        layout.dispose();
        gc.setTransform(null);
        t.dispose();
        int s = Math.max(ih, iw) / 10;
        gc.setBackground(canvas.getForeground());
        switch (slide.getLayout()) {
        case Constants.SLIDE_THUMBNAILS_RIGHT:
        case Constants.SLIDE_THUMBNAILS_LEFT:
            for (int i = 0; i < 5; i++) {
                int y = i * 2 * s + s / 2 + iy;
                for (int j = 0; j < 3; j++)
                    gc.fillRectangle(j * 2 * s + s + ix, y, s, s);
            }
            break;
        case Constants.SLIDE_THUMBNAILS_TOP:
        case Constants.SLIDE_THUMBNAILS_BOTTOM:
            int y = s + iy;
            for (int i = 0; i < 6; i++)
                gc.fillRectangle(i * 18 * s / 10 + ix, y, s, s);
            break;
        }
        gc.dispose();
        return image;
    }

    @Override
    public Image getImage() {
        Image image = super.getImage();
        if (image.isDisposed())
            setImage(image = createSectionImage(canvas, slide));
        return image;
    }

}