de.openali.odysseus.chart.framework.util.img.ChartTooltipPainter.java Source code

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Here is the source code for de.openali.odysseus.chart.framework.util.img.ChartTooltipPainter.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 *
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 *
 *  and
 *
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *
 *  ---------------------------------------------------------------------------*/
package de.openali.odysseus.chart.framework.util.img;

import java.awt.Insets;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;

import de.openali.odysseus.chart.framework.model.mapper.IAxisConstants.ALIGNMENT;
import de.openali.odysseus.chart.framework.model.style.IAreaStyle;
import de.openali.odysseus.chart.framework.model.style.IStyleConstants.FONTSTYLE;
import de.openali.odysseus.chart.framework.model.style.IStyleConstants.FONTWEIGHT;
import de.openali.odysseus.chart.framework.model.style.impl.ColorFill;
import de.openali.odysseus.chart.framework.model.style.impl.TextStyle;
import de.openali.odysseus.chart.framework.util.ChartUtilities;
import de.openali.odysseus.chart.framework.util.StyleUtils;

/**
 * @author kimwerner
 */
public class ChartTooltipPainter {
    private final IChartLabelRenderer m_labelRenderer;

    public ChartTooltipPainter(final IChartLabelRenderer labelRenderer) {
        m_labelRenderer = labelRenderer;
    }

    public ChartTooltipPainter() {
        final TitleTypeBean titleType = new TitleTypeBean(null);
        titleType.setInsets(new Insets(2, 2, 2, 2));
        titleType.setRotation(0);
        final FontData fontData = JFaceResources.getTextFont().getFontData()[0];
        final Display display = ChartUtilities.getDisplay();
        final RGB rgbFill = display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
        final RGB rgbText = display.getSystemColor(SWT.COLOR_INFO_FOREGROUND).getRGB();
        titleType.setTextStyle(new TextStyle(fontData.getHeight(), fontData.getName(), rgbText, rgbFill,
                FONTSTYLE.NORMAL, FONTWEIGHT.NORMAL, ALIGNMENT.LEFT, 255, true));

        m_labelRenderer = new GenericChartLabelRenderer(titleType);
        final IAreaStyle borderStyle = StyleUtils.getDefaultAreaStyle();
        borderStyle.getStroke().setColor(new RGB(0, 0, 0));
        borderStyle.getStroke().setWidth(1);
        borderStyle.setFill(new ColorFill(rgbFill));
        m_labelRenderer.setBorderStyle(borderStyle);
    }

    public IChartLabelRenderer getLabelRenderer() {
        return m_labelRenderer;
    }

    public void paint(final GC gcw, final Point mousePos) {
        final IChartLabelRenderer labelRenderer = getLabelRenderer();

        final Rectangle toolsize = labelRenderer.getSize();
        if (toolsize.width == 0 || toolsize.height == 0)
            return;

        final Rectangle clippRect = gcw.getClipping();
        /*
         * Positionieren der Tooltip-Box: der ideale Platz liegt 3 Pixel rechts ber dem Mauszeiger. Wenn rechts nicht
         * gengend Platz ist, dann wird er nach links verschoben. Der Startpunkt soll dabei immer im sichtbaren Bereich
         * liegen.
         */
        ALIGNMENT posX = ALIGNMENT.LEFT;
        ALIGNMENT posY = ALIGNMENT.BOTTOM;
        int offsetX = 10/* Pixel */;
        int offsetY = -10/* Pixel */;

        final boolean mirrorX = toolsize.width + offsetX + mousePos.x > clippRect.x + clippRect.width;
        final boolean mirrorY = toolsize.height - offsetY - mousePos.y > clippRect.y;
        if (mirrorX) {
            posX = ALIGNMENT.RIGHT;
            offsetX = -3;
        }

        if (mirrorY) {
            posY = ALIGNMENT.TOP;
            offsetY = 3;
            if (toolsize.width < offsetX + mousePos.x) {
                posX = ALIGNMENT.RIGHT;
                offsetX = -3;
            }
        }

        final TitleTypeBean titleTypeBean = labelRenderer.getTitleTypeBean();

        titleTypeBean.setTextAnchorX(posX);
        titleTypeBean.setTextAnchorY(posY);

        titleTypeBean.setInsets(new Insets(5, 10, 5, 10));

        labelRenderer.paint(gcw, new Point(mousePos.x + offsetX, mousePos.y + offsetY));
    }

    public void setTooltip(final String tooltip) {
        getLabelRenderer().getTitleTypeBean().setLabel(tooltip);
    }
}