Source Code : Zoom Demo

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Zoom Demo

import java.awt.*;

import javax.swing.*;

import no.geosoft.cc.geometry.Geometry;
import no.geosoft.cc.graphics.*;



/**
 * G demo program. Demonstrates:
 *
 * <ul>
 *   <li> The effect of using world coordinates
 *   <li> Default zoom interaction
 * </ul>
 * 
 * @author <a href="mailto:jacob.dreyer@geosoft.no">Jacob Dreyer</a>
 */   
public class Demo1a extends JFrame
{
  public Demo1a()
  {
    super ("G Graphics Library - Demo 1a");    
    setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
    
    // Create the graphic canvas
    GWindow window = new GWindow(new Color (210, 235, 255));
    getContentPane().add (window.getCanvas());
    
    // Create scene with default viewport and world extent settings
    GScene scene = new GScene (window);
    scene.setWorldExtent (0.0, 0.0, 1.0, 1.0);

    // Create the graphics object and add to the scene
    GObject object = new HelloWorld();
    scene.add (object);

    pack();
    setSize (new Dimension (500, 500));
    setVisible (true);

    window.startInteraction (new ZoomInteraction (scene));
  }


  
  /**
   * Defines the geometry and presentation for the sample
   * graphic object.
   */   
  public class HelloWorld extends GObject
  {
    private GSegment star_;
    
    
    public HelloWorld()
    {
      star_ = new GSegment();
      GStyle starStyle = new GStyle();
      starStyle.setForegroundColor (new Color (255, 0, 0));
      starStyle.setBackgroundColor (new Color (255, 255, 0));
      starStyle.setLineWidth (3);
      setStyle (starStyle);
      addSegment (star_);
      
      GText text = new GText ("HelloWorld", GPosition.MIDDLE);
      GStyle textStyle = new GStyle();
      textStyle.setForegroundColor (new Color (100, 100, 150));
      textStyle.setBackgroundColor (null);
      textStyle.setFont (new Font ("Dialog", Font.BOLD, 48));
      text.setStyle (textStyle);
      star_.setText (text);
    }
    

  
    /**
     * This method is called whenever the canvas needs to redraw this
     * object. For efficiency, prepare as much of the graphic object
     * up front (such as sub object, segment and style setup) and
     * set geometry only in this method.
     */
    public void draw()
    {
      star_.setGeometryXy (Geometry.createStar (0.5, 0.5, 0.4, 0.2, 15));
    }
  }
  


  public static void main (String[] args)
  {
    new Demo1a();
  }
}

           
       

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