oneclickzoomouttool.java

geotools的源码

package uk.ac.leeds.ccg.geotools;
import java.awt.Cursor;
/**
 * OneClickZoomInTool is a simple alternative to the zoom tool that zooms out on a point.
 * 
 *
 * @since 0.7.9.0 22 November 2000
 * @author James Macgill JM
 */
public class OneClickZoomOutTool extends SimpleTool{
   
    double percent = 20;
		static boolean DEBUG=false;
		static String DBC="OZO ";

   
    /**
     * Returns the default cursor type for this tool.
     * In this instance, a HAND_CURSOR.
     * @author James Macgill
     * @since 0.7.9.0 22 November 2000
     * @return Cursor the default cursor for this tool
     */
    public Cursor getCursor(){
        return  new Cursor(Cursor.HAND_CURSOR);
    }
    
    /**
     * Sets the amount that the zoom is changed by when the tool is activeted.
     * @since 0.7.9.0 22 November 2000
     * @param percent The new zoom change amount
     */
    public void setAmmount(double percent){
        this.percent = percent;
    }
    
    /**
     * called when a mouse button has been clciked.
     * The view is centered on the point of the click and zoomed out.
     * 
     * @author James Macgill
     * @since 0.7.9.0 22 November 2000
     */
    public void click(){     
				if(DEBUG)System.out.println(DBC+"Zooming out by "+percent);
        context.zoomOutOnPoint(mouse.getMapPoint(),percent);
        super.click();//clean up
    }
    public int getRubberBandShape(){
        return NONE;
    }
    
     /**
   * provides a short name for this tool.
   * The name should be suitable for inclusion in a menu or on a button.
   *
   * @author James Macgill JM
   * @since 0.7.9 November 23 2000
   * @return String The name of this tool.
   */
   public String getName(){
    return "Zoom Out";
   }
   
   /**
   * provides a description for this tool.
   * The description should briefly describe the purpose of the dool
   *
   * @author James Macgill JM
   * @since 0.7.9 November 23 2000
   * @return String A description of this tool.
   */
   public String getDescription(){
    return "Centers the map on selected point and zooms out";
   }
}