This function provides a way to cancel the effects of the zoom on a particular Stroke. - Java 2D Graphics

Java examples for 2D Graphics:Stroke

  1. HOME
  2. Java
  3. 2D Graphics
  4. Stroke

Description

This function provides a way to cancel the effects of the zoom on a particular Stroke.

Demo Code

/*//from  www. j a  v a2 s. c  o  m
 * iReport - Visual Designer for JasperReports.
 * Copyright (C) 2002 - 2009 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of iReport.
 *
 * iReport is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * iReport 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with iReport. If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.awt.BasicStroke;

import java.awt.Stroke;

public class Main {
    /**
     * This function provides a way to cancel the effects of the zoom on a particular Stroke.
     * All the stroke values (as line width, dashes, etc...) are divided by the zoom factor.
     * This allow to have essentially a fixed Stroke independent by the zoom.
     * The returned Stroke is a copy.
     * Remember to restore the right stroke in the graphics when done.
     * 
     * It works only with instances of BasicStroke
     * 
     * zoom is the zoom factor.
     */
    public static Stroke getInvertedZoomedStroke(Stroke stroke, double zoom) {
        if (stroke == null || !(stroke instanceof BasicStroke))
            return stroke;

        BasicStroke bs = (BasicStroke) stroke;
        float[] dashArray = bs.getDashArray();

        float[] newDashArray = null;
        if (dashArray != null) {
            newDashArray = new float[dashArray.length];
            for (int i = 0; i < newDashArray.length; ++i) {
                newDashArray[i] = (float) (dashArray[i] / zoom);
            }
        }

        BasicStroke newStroke = new BasicStroke(
                (float) (bs.getLineWidth() / zoom), bs.getEndCap(),
                bs.getLineJoin(), bs.getMiterLimit(),
                //(float)(bs.getMiterLimit() / zoom),
                newDashArray, (float) (bs.getDashPhase() / zoom));
        return newStroke;
    }
}

Related Tutorials