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| Drag and Draw Demo | |
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import java.io.File;
import java.awt.*;
import javax.swing.*;
import no.geosoft.cc.geometry.Geometry;
import no.geosoft.cc.graphics.*;
/**
* G demo program. Demonstrates:
*
* <ul>
* <li>Simple image handling
* <li>Simple drawing interaction
* </ul>
*
* @author <a href="mailto:[email protected]">Jacob Dreyer</a>
*/
public class Demo10 extends JFrame
implements GInteraction
{
private GScene scene_;
private GSegment route_;
private int[] xy_;
public Demo10 (String imageFileName)
{
super ("G Graphics Library - Demo 10");
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
getContentPane().setLayout (new BorderLayout());
getContentPane().add (new JLabel ("Draw line on map using mouse button 1"),
BorderLayout.NORTH);
// Create the graphic canvas
GWindow window = new GWindow();
getContentPane().add (window.getCanvas(), BorderLayout.CENTER);
// Create scane with default viewport and world extent settings
scene_ = new GScene (window);
// Create a graphic object
GObject object = new TestObject (imageFileName);
scene_.add (object);
pack();
setSize (new Dimension (500, 500));
setVisible (true);
window.startInteraction (this);
}
public void event (GScene scene, int event, int x, int y)
{
switch (event) {
case GWindow.BUTTON1_DOWN :
xy_ = new int[] {x, y};
route_.setGeometry (xy_);
scene_.refresh();
break;
case GWindow.BUTTON1_DRAG :
int[] a = new int[xy_.length + 2];
System.arraycopy (xy_, 0, a, 0, xy_.length);
a[a.length-2] = x;
a[a.length-1] = y;
xy_ = a;
route_.setGeometry (xy_);
scene_.refresh();
break;
}
}
/**
* Defines the geometry and presentation for a sample
* graphic object.
*/
private class TestObject extends GObject
{
private GSegment segment_;
TestObject (String imageFileName)
{
segment_ = new GSegment();
addSegment (segment_);
GImage image = new GImage (new File (imageFileName));
image.setPositionHint (GPosition.SOUTHEAST);
segment_.setImage (image);
route_ = new GSegment();
addSegment (route_);
GStyle routeStyle = new GStyle();
routeStyle.setForegroundColor (new Color (255, 0, 0));
routeStyle.setLineWidth (4);
routeStyle.setAntialiased (true);
route_.setStyle (routeStyle);
}
public void draw()
{
segment_.setGeometry (0, 0);
route_.setGeometry (xy_);
}
}
public static void main (String[] args)
{
//if (args.length != 1) {
//System.out.println ("Provide an image file name");
// System.exit (0);
// }
//new Demo10 (args[0]);
new Demo10 ("logo.png");
}
}
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| |  G-SimpleDragAndDraw.zip( 224 k) | | Related examples in the same category |
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