package draganddrop;

import org.gnu.gdk.DragContext;
import org.gnu.gtk.Button;
import org.gnu.gtk.ButtonBox;
import org.gnu.gtk.ButtonBoxStyle;
import org.gnu.gtk.DestDefaults;
import org.gnu.gtk.Entry;
import org.gnu.gtk.Gtk;
import org.gnu.gtk.GtkStockItem;
import org.gnu.gtk.HButtonBox;
import org.gnu.gtk.Label;
import org.gnu.gtk.SelectionData;
import org.gnu.gtk.TargetEntry;
import org.gnu.gtk.TargetFlags;
import org.gnu.gtk.VBox;
import org.gnu.gtk.Widget;
import org.gnu.gtk.Window;
import org.gnu.gtk.WindowType;
import org.gnu.gtk.event.ButtonEvent;
import org.gnu.gtk.event.ButtonListener;
import org.gnu.gtk.event.DragDestinationListener;
import org.gnu.gtk.event.LifeCycleEvent;
import org.gnu.gtk.event.LifeCycleListener;

/**
 * An example of using drag and drop in applications
 */
public class DnDExample3 implements DragDestinationListener{

	final private Window win;

	private Label info;

	/**
	 * Create the main window
	 */
	private DnDExample3(){

		win = new Window( WindowType.TOPLEVEL );
		win.setBorderWidth(25);
		win.setTitle("Java-Gnome Drag and Drop Example");
		win.addListener(new LifeCycleListener() {
			public void lifeCycleEvent(LifeCycleEvent event) {}
			public boolean lifeCycleQuery(LifeCycleEvent event) {
				if (event.isOfType(LifeCycleEvent.Type.DESTROY) || 
						event.isOfType(LifeCycleEvent.Type.DELETE)) {
						Gtk.mainQuit();
				}
				return false;
			}
		});


		VBox vb = new VBox( false, 25 );
		win.add(vb);

		info = new Label("Drag things (e.g. files from nautilus) into the frame below");
		info.setLineWrap(true);
		vb.packStart(info, false, false, 0);

//		Frame ddFrame = new Frame("Drag and Drop frame");
//		ddFrame.setShadow( ShadowType.OUT );
		Entry ddFrame = new Entry();
		vb.packStart( ddFrame, true, true, 0);

	

		/*
		 * Set the frame up so that it may receive drag and drop events of the
		 * specified types from any application.
 		 * The final integers of TargetEntry are used only in this application -
		 * They exist as it is faster to compare integers than strings when
		 * handling drop events.
		 */
		ddFrame.addListener( (DragDestinationListener) this );
		ddFrame.setDragDestination( DestDefaults.ALL,
				new TargetEntry[] {
					new TargetEntry( "text/uri-list", TargetFlags.NO_RESTRICTION, 1),
					new TargetEntry( "text/x-moz-url", TargetFlags.NO_RESTRICTION, 2),
					new TargetEntry( "UTF8_STRING", TargetFlags.NO_RESTRICTION, 3),
					new TargetEntry( "STRING", TargetFlags.NO_RESTRICTION, 4),
					new TargetEntry( "application/x-color", TargetFlags.NO_RESTRICTION, 5),
					new TargetEntry( "property/bgimage", TargetFlags.NO_RESTRICTION, 6),

				},
				org.gnu.gdk.DragAction.COPY );
		

		Button close = new Button( GtkStockItem.CLOSE );
		close.addListener( new ButtonListener(){
			public void buttonEvent( ButtonEvent event ){
				if (event.isOfType( ButtonEvent.Type.CLICK )){
					win.hide();
					Gtk.mainQuit();
				}
			}
		});
		ButtonBox bb = new HButtonBox();
		bb.setLayout( ButtonBoxStyle.END );
		bb.add(close);
		vb.packStart( bb, false, false, 0);
		

		win.showAll();
	}

	/**
	 * Called when items are dragged into the frame
	 * implements the DragDestinationListener interface. 
	 */
	public void dataReceived(Widget widget, DragContext dc, SelectionData data, int targetInfo) {
		System.out.println("Drag Data Received");
		System.out.println("ID: "+targetInfo);
		System.out.println( "length: "+data.getLength() );
		System.out.println( data.getText() );
	}



	/**
	 * Initialise gtk, create the application, start the main graphics loop
	 */
	public static void main( String[] args ){
		Gtk.init(args);
		DnDExample3 instance = new DnDExample3();
		Gtk.main();
	}	

}