zoomout.java

来自「Java生成PDF Java生成PDF Java生成PDF」· Java 代码 · 共 38 行

// $Id: ZoomOut.java,v 1.9 2007/11/07 05:16:49 mike Exp $

package org.faceless.pdf2.viewer2.feature;

import org.faceless.pdf2.viewer2.*;
import org.faceless.pdf2.*;
import javax.swing.*;
import java.awt.event.*;

/**
 * Create a button which zooms the document out to the next level.
 * The name of this feature is "ZoomOut".
 * <p><i>This code is copyright the Big Faceless Organization. You're welcome to use, modify and distribute it in any form in your own projects, provided those projects continue to make use of the Big Faceless PDF library.</i></p>
 * @since 2.8
 */
public class ZoomOut extends ViewerWidget
{
    public ZoomOut() {
        super("ZoomOut");
        setButton("Navigation", "resources/icons/ZoomOut.png", "tt.ZoomOut");
        setMenu("View\tZoom\tZoomOut");
    }

    public void action(ViewerEvent event) {
        PDFViewer viewer = event.getViewer();
        JComboBox zoomlevel = (JComboBox)viewer.getNamedComponent("ZoomLevel");
        float currentzoom = event.getDocumentPanel().getZoom();
        for (int i=zoomlevel.getItemCount()-1;i>=0;i--) {
            String s = (String)zoomlevel.getItemAt(i);
            float thiszoom = Float.parseFloat(s.substring(0, s.length()-1))/100;
            if (thiszoom<currentzoom) {
                zoomlevel.setSelectedItem(s);
                break;
            }
        }
    }
}