Synthuse version 1.0.5

base version by ejakubowski

src/org/synthuse/DragTarget.java

@@ -0,0 +1,167 @@
+/*
+ * Copyright 2014, Synthuse.org
+ * Released under the Apache Version 2.0 License.
+ *
+ * last modified by ejakubowski
+*/
+
+package org.synthuse;
+
+import java.awt.Cursor;
+import java.awt.Point;
+import java.awt.Toolkit;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.dnd.DragSource;
+import java.awt.dnd.DragSourceAdapter;
+import java.awt.dnd.DragSourceDragEvent;
+import java.awt.dnd.DragSourceMotionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.image.BufferedImage;
+
+import javax.activation.ActivationDataFlavor;
+import javax.activation.DataHandler;
+import javax.imageio.ImageIO;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.TransferHandler;
+
+
+public class DragTarget extends JLabel  {
+
+	public static String CUSTOM_ICON_RESOURCE = "/org/synthuse/img/bullseye-logo-th32x32.png";
+	
+	private static final long serialVersionUID = 1L;
+	
+	public static interface dragEvents {
+		void dragStarted(JComponent c);
+		void dragMouseMoved(int x, int y);
+		void dropped(JComponent c);
+	}
+	public dragEvents events = new dragEvents() {
+		public void dragStarted(JComponent c) {
+			
+		}
+		public void dragMouseMoved(int x, int y) {
+			
+		}
+		public void dropped(JComponent c) {
+			
+		}
+	};
+	
+	public DragTarget() {
+		
+		this.setTransferHandler(new CustomTransferHandler());
+		
+		this.addMouseListener(new MouseAdapter(){
+	        public void mousePressed(MouseEvent e)
+	        {
+	            JComponent comp = (JComponent)e.getSource();
+	            TransferHandler handler = comp.getTransferHandler();
+	            //c.setOpaque(true);
+	            handler.exportAsDrag(comp, e, TransferHandler.MOVE);
+	        }			
+		});
+	}
+	
+	@SuppressWarnings("serial")
+	class CustomTransferHandler extends TransferHandler {
+		//private final JWindow window = new JWindow();
+		private final DataFlavor localObjectFlavor;
+		private final JLabel label = new JLabel();
+		//public Cursor blankCursor = null;
+		public Cursor customCursor = null;
+		
+		public CustomTransferHandler () {
+			//System.out.println("CustomTransferHandler");
+			localObjectFlavor = new ActivationDataFlavor(DragTarget.class, DataFlavor.javaJVMLocalObjectMimeType, "JLabel");
+			//label = DragTarget.this;
+			//window.add(label);
+			//window.setAlwaysOnTop(true);
+			//window.setBackground(new Color(0,true));
+			// Create a new blank cursor.
+			//BufferedImage cursorImg = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
+			//blankCursor = Toolkit.getDefaultToolkit().createCustomCursor(cursorImg, new Point(0, 0), "blank cursor");
+			try {
+				BufferedImage image = ImageIO.read(SynthuseDlg.class.getResourceAsStream(CUSTOM_ICON_RESOURCE));
+				customCursor = Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(15, 16), "custom cursor");
+			} catch (Exception e1) {
+				e1.printStackTrace();
+			}
+
+			
+			DragSource.getDefaultDragSource().addDragSourceMotionListener(new DragSourceMotionListener() {
+				@Override
+				public void dragMouseMoved(DragSourceDragEvent e) {
+					events.dragMouseMoved(e.getLocation().x, e.getLocation().y);
+					//Point pt = e.getLocation();
+					//pt.translate(-9, -9); // offset
+					//window.setLocation(pt);
+					//e.getDragSourceContext().setCursor(customCursor);//DragSource.DefaultLinkDrop
+				}
+			});
+			
+			DragSource.getDefaultDragSource().addDragSourceListener(new DragSourceAdapter() {
+				@Override
+				public void dragEnter(DragSourceDragEvent e) {
+					e.getDragSourceContext().setCursor(customCursor);//DragSource.DefaultLinkDrop
+					//System.out.println("dragEnter");
+				}
+			});
+			
+		}
+		
+		@Override 
+		protected Transferable createTransferable(JComponent c) {
+			//System.out.println("createTransferable");
+			//JLabel l = (JLabel)c;
+			//String text = l.getText();
+			final DataHandler dh = new DataHandler(c, localObjectFlavor.getMimeType());
+			return dh;
+			//return new StringSelection("");
+		}
+		
+		@Override 
+		public boolean canImport(TransferSupport support) {
+			return true;
+		}
+		
+		@Override 
+		public boolean importData(TransferSupport support) {
+			System.out.println("importData");
+			return true;
+		}
+		
+		@Override 
+		public int getSourceActions(JComponent c) {
+			//System.out.println("getSourceActions");
+			events.dragStarted(c);
+			JLabel p = (JLabel)c;
+			label.setIcon(p.getIcon());
+			//label.setText(p.draggingLabel.getText());
+			//window.pack();
+			//Point pt = p.getLocation();
+			//SwingUtilities.convertPointToScreen(pt, p);
+			//window.setLocation(pt);
+			//window.setVisible(true);
+			return MOVE;
+		}
+		
+		@Override 
+		protected void exportDone(JComponent c, Transferable data, int action) {
+			//System.out.println("exportDone");
+			events.dropped(c);
+			JLabel src = (JLabel)c;
+			if(action == TransferHandler.MOVE) {
+				src.remove(src);
+				src.revalidate();
+				src.repaint();
+			}
+			src = null;
+			//window.setVisible(false);
+			//window.dispose();
+		}
+	}
+}