merge constraints dialog branch

src/mustic/gui/MainFrame.java

@@ -1353,7 +1353,7 @@ public class MainFrame extends JFrame {
 		menuItemConfig.setText(Messages.getString("MainFrame.11"));
 		menuItemQuit.setText(Messages.getString("MainFrame.12"));
 		menuItemClustering.setText(Messages.getString("MainFrame.14"));
-	    menuItemData.setText(Messages.getString("MainFrame.010"));
+		menuItemData.setText(Messages.getString("MainFrame.010"));
 		menuItemSegmentation.setText(Messages.getString("MainFrame.17"));
 		menuItemROI.setText(Messages.getString("MainFrame.21"));
 		menuItemRoiEval.setText(Messages.getString("MainFrame.22"));
@@ -1415,7 +1415,7 @@ public class MainFrame extends JFrame {
 		JPanel westPanel = new JPanel(new BorderLayout());
 
 		/** Panel West : default */
-		// Cereation of the Project Tree Interface for datas
+		// Creation of the Project Tree Interface for datas
 		JPanel treeDataPanel = new JPanel(new BorderLayout());
 		JScrollPane treeDataScrollPane = new JScrollPane(this.mDataProjectTree);
 		treeDataScrollPane.setPreferredSize(new Dimension(180, 100));
@@ -1425,7 +1425,7 @@ public class MainFrame extends JFrame {
 		sif_treeDataPanel.setPreferredSize(new Dimension(160, 50));
 		sif_treeDataPanel.add(treeDataPanel);
 		
-		// Cereation of the Project Tree Interface for images
+		// Creation of the Project Tree Interface for images
 		JPanel treeImagePanel = new JPanel(new BorderLayout());
 		JScrollPane treeImageScrollPane = new JScrollPane(this.mImageProjectTree);
 		treeImageScrollPane.setPreferredSize(new Dimension(180, 100));
@@ -1442,7 +1442,7 @@ public class MainFrame extends JFrame {
 		sif_infosPanel.setPreferredSize(new Dimension(160, 180));
 		sif_infosPanel.add(this.infosPanel);
 
-		// Creation of the Bitd View Interface
+		// Creation of the Bird View Interface
 		this.birdPanel = new JPanel(new BorderLayout());
 		this.birdPanel.setPreferredSize(new Dimension(160, 100));
 
@@ -1480,7 +1480,7 @@ public class MainFrame extends JFrame {
 		// =============== Creation of the Desktop ================
 		JPanel panel_desktop = new JPanel(new BorderLayout());
 		panel_desktop.setOpaque(false);
-		panel_desktop.setBorder(Borders.DIALOG_BORDER);
+		panel_desktop.setBorder(Borders.DIALOG);
 		panel_desktop.add(this.desktop);
 
 		sif_desktop = new SimpleInternalFrame(Messages.getString("MainFrame.72")); //$NON-NLS-1$
@@ -1494,7 +1494,7 @@ public class MainFrame extends JFrame {
 
 		JPanel panel = new JPanel(new BorderLayout());
 		panel.setOpaque(false);
-		panel.setBorder(Borders.DIALOG_BORDER);
+		panel.setBorder(Borders.DIALOG);
 		panel.add(pane);
 
 		// =============== Creation of the Progress Panel => South
@@ -1529,6 +1529,37 @@ public class MainFrame extends JFrame {
 		// Selection par defaut
 		this.birdPanel.requestFocus();
 	}
+
+	//TODO to remove	
+	// method for resizing an image while keeping aspect ratio
+	private static BufferedImage resizeImage(BufferedImage originalImage, int type, int frameWidth, int frameHeight) {
+
+		double height = originalImage.getHeight();
+		double width = originalImage.getWidth();
+		int newWidth, newHeight;
+
+		// if image size smaller than window size, do not resize
+		if (height < frameHeight && width < frameWidth) {
+			newWidth = (int) width;
+			newHeight = (int) height;
+		}
+		// else resize
+		else {
+			double scaleX = (frameWidth / width);
+			double scaleY = (frameHeight / height);
+			double scale = Math.min(scaleX, scaleY);
+			newWidth = (int) (width * scale);
+			newHeight = (int) (height * scale);
+		}
+
+		BufferedImage resizedImage = new BufferedImage(newWidth, newHeight, type);
+		Graphics2D g = resizedImage.createGraphics();
+		g.drawImage(originalImage, 0, 0, newWidth, newHeight, null);
+		g.dispose();
+
+		return resizedImage;
+	}
+
 	
 	// 20120309_MBH-Test-Fin
 	/**
@@ -1548,7 +1579,7 @@ public class MainFrame extends JFrame {
 		JPanel westPanel = new JPanel(new BorderLayout());
 
 		/** Panel West : default */
-		// Cereation of the Project Tree Interface for datas
+		// Creation of the Project Tree Interface for datas
 		JPanel treeDataPanel = new JPanel(new BorderLayout());
 		JScrollPane treeDataScrollPane = new JScrollPane(this.mDataProjectTree);
 		treeDataScrollPane.setPreferredSize(new Dimension(180, 100));
@@ -1558,7 +1589,7 @@ public class MainFrame extends JFrame {
 		sif_treeDataPanel.setPreferredSize(new Dimension(160, 50));
 		sif_treeDataPanel.add(treeDataPanel);
 		
-		// Cereation of the Project Tree Interface for images
+		// Creation of the Project Tree Interface for images
 		JPanel treeImagePanel = new JPanel(new BorderLayout());
 		JScrollPane treeImageScrollPane = new JScrollPane(this.mImageProjectTree);
 		treeImageScrollPane.setPreferredSize(new Dimension(180, 100));
@@ -1567,6 +1598,7 @@ public class MainFrame extends JFrame {
 		sif_treeImagePanel = new SimpleInternalFrame(Messages.getString("MainFrame.691")); //$NON-NLS-1$
 		sif_treeImagePanel.setPreferredSize(new Dimension(160, 50));
 		sif_treeImagePanel.add(treeImagePanel);
+		
 
 		// Creation of the Informations Panel Interface
 		this.infosPanel = new JPanel(new BorderLayout());
@@ -1575,7 +1607,7 @@ public class MainFrame extends JFrame {
 		sif_infosPanel.setPreferredSize(new Dimension(160, 180));
 		sif_infosPanel.add(this.infosPanel);
 
-		// Creation of the Bitd View Interface
+		// Creation of the Bird View Interface
 		this.birdPanel = new JPanel(new BorderLayout());
 		this.birdPanel.setPreferredSize(new Dimension(160, 100));
 
@@ -1595,7 +1627,7 @@ public class MainFrame extends JFrame {
 		JSplitPane pane4 = Factory.createStrippedSplitPane(JSplitPane.VERTICAL_SPLIT, 
 				pane3, sif_birdPanel, 1f);
 		pane3.setOpaque(false);
-
+		
 		westPanel.add(pane4, BorderLayout.CENTER);
 		/** End of operation => Panel West : default */
 
@@ -1615,7 +1647,7 @@ public class MainFrame extends JFrame {
 		// =============== Creation of the Desktop ================
 		JPanel panel_desktop = new JPanel(new BorderLayout());
 		panel_desktop.setOpaque(false);
-		panel_desktop.setBorder(Borders.DIALOG_BORDER);
+		panel_desktop.setBorder(Borders.DIALOG);
 		panel_desktop.add(this.desktop);
 
 		sif_desktop = new SimpleInternalFrame(Messages.getString("MainFrame.72")); //$NON-NLS-1$
@@ -1629,7 +1661,7 @@ public class MainFrame extends JFrame {
 
 		JPanel panel = new JPanel(new BorderLayout());
 		panel.setOpaque(false);
-		panel.setBorder(Borders.DIALOG_BORDER);
+		panel.setBorder(Borders.DIALOG);
 		panel.add(pane);
 
 		// =============== Creation of the Progress Panel => South

src/mustic/gui/dialog/classifier/ConstraintsColor.java

+package mustic.gui.dialog.classifier;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.GridLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.Vector;
+import javax.swing.BorderFactory;
+import javax.swing.JButton;
+import javax.swing.JColorChooser;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.ScrollPaneConstants;
+import javax.swing.border.EtchedBorder;
+import javax.swing.border.TitledBorder;
+
+/**
+ * Dialog that allows the user to change the color of the constraints
+ */
+public class ConstraintsColor extends JDialog {
+
+	private static final long serialVersionUID = 1L;
+
+	/** constraints colors */
+	private Color 					mustLinkColor 			 			= new Color(124, 252, 0);
+	private Color 					cannotLinkColor 					= new Color(255, 0, 255);
+	private Vector<Color> 			labelConstraintColor 				= new Vector<Color>();
+
+	/** constraints buttons */
+	private JButton 				jb_mustLinkChooseColor 				= new JButton();
+	private JButton 				jb_cannotLinkChooseColor 			= new JButton();
+	private Vector<JButton> 		jb_labelConstraintClassChooseColor	= new Vector<JButton>();
+
+	/** dynamic JPanel Colors of Label Constraints Classes*/
+	JPanel 									labelColorConstraintPanel			= new JPanel(new GridLayout(0,1));
+
+	private ConstraintsSelectionDialog		dialog = null;
+
+	/**
+	 * @brief Constructor dialog window that allows the user to change the color of the constraints 
+	 * @param d
+	 * @param colorML
+	 * @param colorCL
+	 * @param colorVectorLabel
+	 */
+	public ConstraintsColor(ConstraintsSelectionDialog d, Color colorML, Color colorCL, Vector<Color> colorVectorLabel) {
+		this.dialog = d;
+		this.mustLinkColor = colorML;
+		this.cannotLinkColor = colorCL;
+		this.labelConstraintColor = colorVectorLabel;
+
+		//buttons action listeners that allow the user to choose the color of the constraint
+		jb_cannotLinkChooseColor.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				chooseCannotLinkColor(); 
+			}
+		});
+
+		jb_mustLinkChooseColor.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				chooseMustLinkColor();
+			}
+
+		});
+
+		// creates the panel for the label constraints
+		for(int i=0; i<dialog.getClassCounter(); i++) {
+			JButton jb = new JButton();
+			jb_labelConstraintClassChooseColor.add(jb);
+			jb_labelConstraintClassChooseColor.get(i).putClientProperty("index", i);
+			jb_labelConstraintClassChooseColor.get(i).setBackground(labelConstraintColor.get(i));
+			createLabelColorConstraintsPanel(i);
+		}
+
+		this.setTitle("Choose Constraints Colors");
+
+		chooseConstraintColors();
+
+	}
+
+	/**
+	 * Add the last created label constraint class name(number) and its color
+	 * button to the panel labelColorConstraintPanel. The button allows user to
+	 * choose the label constraint class color.
+	 **/
+	protected void createLabelColorConstraintsPanel(int index) {
+
+		JPanel classNameButtonPanel = new JPanel(new GridLayout(1, 2));
+		classNameButtonPanel.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
+
+		classNameButtonPanel.add(new JLabel("Class "+ (index+1) + ":"));
+		jb_labelConstraintClassChooseColor.get(index).addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent event) {
+
+				JButton lblClassColorButtonClicked = (JButton) event.getSource();
+				int buttonIndex = (int) lblClassColorButtonClicked.getClientProperty("index");
+				chooseLabelClassColor(buttonIndex);
+			}
+		});
+		classNameButtonPanel.add(jb_labelConstraintClassChooseColor.get(index));
+
+		labelColorConstraintPanel.add(classNameButtonPanel);
+	}
+
+	/** Opens a JDialog for choosing the Constraints Colors*/
+	protected void chooseConstraintColors() {
+		JPanel constraintsPanel=new JPanel(new BorderLayout());
+		JPanel mlConstraintsPanel=new JPanel();
+		JPanel clConstraintsPanel=new JPanel();
+		JPanel mlclConstraintsPanel=new JPanel(new GridLayout(2,1));
+		JPanel supportPanel=new JPanel(new BorderLayout());
+		supportPanel.add(labelColorConstraintPanel,BorderLayout.NORTH);
+
+		JScrollPane lblConstraintsPane=new JScrollPane(supportPanel,ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
+		TitledBorder lblcBorder=BorderFactory.createTitledBorder( BorderFactory.createEtchedBorder(EtchedBorder.LOWERED),"Label Constraints Color",TitledBorder.LEFT,TitledBorder.TOP);
+		lblConstraintsPane.setBorder(lblcBorder);
+
+		// must-link constraints panel
+		mlConstraintsPanel.setLayout(new BorderLayout());
+		TitledBorder mlcBorder=BorderFactory.createTitledBorder( BorderFactory.createEtchedBorder(EtchedBorder.LOWERED),"Must-Link Constraints Color",TitledBorder.LEFT,TitledBorder.TOP);
+		mlConstraintsPanel.setBorder(mlcBorder);
+		mlConstraintsPanel.add(jb_mustLinkChooseColor,BorderLayout.CENTER);
+		mlclConstraintsPanel.add(mlConstraintsPanel);
+
+		// cannot-link constraints panel
+		clConstraintsPanel.setLayout(new BorderLayout());
+		TitledBorder clcBorder=BorderFactory.createTitledBorder( BorderFactory.createEtchedBorder(EtchedBorder.LOWERED),"Cannot-Link Constraints Color",TitledBorder.LEFT,TitledBorder.TOP);
+		clConstraintsPanel.setBorder(clcBorder);
+		clConstraintsPanel.add(jb_cannotLinkChooseColor,BorderLayout.CENTER);
+		mlclConstraintsPanel.add(clConstraintsPanel);
+
+
+		// button panel
+		JPanel buttonPanel=new JPanel();
+		JButton ok = new JButton("OK");// update color changes on ok, update only fields that have changed
+		ok.addActionListener( new ActionListener() {
+			@Override public void actionPerformed(ActionEvent event) {
+				dialog.setColorML(mustLinkColor);
+				dialog.setColorCL(cannotLinkColor);
+				dialog.setColorLabels(labelConstraintColor);
+				ConstraintsColor.this.dispose();
+			}
+		});
+
+		
+		// exit dialog on cancel
+		JButton cancel = new JButton("Cancel");
+		cancel.addActionListener( new ActionListener() {
+			public void actionPerformed(ActionEvent event) {
+				ConstraintsColor.this.dispose();
+			}
+		});
+
+		jb_mustLinkChooseColor.setBackground(mustLinkColor);
+		jb_cannotLinkChooseColor.setBackground(cannotLinkColor);
+
+		buttonPanel.add(ok);		
+		buttonPanel.add(cancel);	
+
+		constraintsPanel.add(mlclConstraintsPanel,BorderLayout.NORTH);
+		constraintsPanel.add(lblConstraintsPane,BorderLayout.CENTER);
+		constraintsPanel.add(buttonPanel,BorderLayout.SOUTH);
+
+		this.add(constraintsPanel,BorderLayout.CENTER);
+
+		this.setPreferredSize(new Dimension(270, 270));
+		this.pack();
+		this.setLocationRelativeTo(null);
+		this.setModal(true);
+		this.setVisible(true);
+
+	}
+
+	/**
+	 * Color Chooser for Must-Link constraints\n Sets the temporary color and
+	 * button indicating the chosen color.
+	 */
+	protected void chooseMustLinkColor() {
+		mustLinkColor = JColorChooser.showDialog(this,"Must-Link Color Chooser",Color.red);
+		this.jb_mustLinkChooseColor.setBackground(mustLinkColor);
+	}
+
+	/**
+	 * Color Chooser for Cannot-Link constraints\n Sets the temporary color and
+	 * button indicating the chosen color.
+	 **/
+	protected void chooseCannotLinkColor() {
+		this.cannotLinkColor = JColorChooser.showDialog(this, "Cannot-Link Color Chooser", //$NON-NLS-1$
+				cannotLinkColor);
+		this.jb_cannotLinkChooseColor.setBackground(cannotLinkColor);
+
+	}
+
+	/**
+	 * Color Chooser for a Label constraint of the class "classID" \n Sets the
+	 * temporary color and button indicating the chosen color for the class.
+	 **/
+	protected void chooseLabelClassColor(int indexClass) {
+
+		Color lblCColorTemp = JColorChooser.showDialog(this, "Label Class Color Chooser", Color.red); //$NON-NLS-1$
+		this.labelConstraintColor.set(indexClass, lblCColorTemp);
+		this.jb_labelConstraintClassChooseColor.get(indexClass).setBackground(lblCColorTemp);
+	}
+
+}

src/mustic/gui/dialog/classifier/messages_en.properties

@@ -62,5 +62,8 @@ ConstraintsSelectionDialog.526=Export
 ConstraintsSelectionDialog.53=Unknown file format for import
 ConstraintsSelectionDialog.54=Error
 ConstraintsSelectionDialog.55=Cancel
+ConstraintsSelectionDialog.56=Constraints Colors
+ConstraintsSelectionDialog.57=Hide Constraints
+ConstraintsSelectionDialog.58=Zoom Box
 ConstraintsSelectionDialog.7=Image
 ConstraintsSelectionDialog.8=Constraint selection

src/mustic/gui/dialog/classifier/messages_fr.properties

@@ -62,5 +62,7 @@ ConstraintsSelectionDialog.526=Export
 ConstraintsSelectionDialog.53=Format de fichier inconnu lors de l'import
 ConstraintsSelectionDialog.54=Erreur
 ConstraintsSelectionDialog.55=Annuler
+ConstraintsSelectionDialog.56=Couleurs de contraintes
+ConstraintsSelectionDialog.57=Cacher les contraintes
 ConstraintsSelectionDialog.7=Image
 ConstraintsSelectionDialog.8=Slection des contraintes

src/mustic/gui/tools/ZoomBoxPanel.java

+package mustic.gui.tools;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.image.BufferedImage;
+
+import javax.swing.JPanel;
+
+/**
+ * Creates a zoom box over a displayed image 
+ * 
+ * @author Marija Kirandjiska
+ *
+ */
+public class ZoomBoxPanel extends JPanel{
+
+	/**	 */
+	private static final long 					serialVersionUID = 1L;
+
+	private Point 								zoomPoint;	
+	private Zoomable 							dialog;
+	private float 								zoomMin          = 1.5f;
+	private float 								zoom 			 = 2.0f;	
+	private final float 						zoomStep         = 0.1f;
+	private final int 							zoomAreaAdd      = 5;
+	private final int 							zoomAreaMin      = 50;
+	private final int 							zoomAreaMax      = 300;
+	private int 								zoomArea         = 120;
+	private boolean 							zoomBoxEnabled   = false;  
+
+	public ZoomBoxPanel(Zoomable dialog, float zoom, int zoomArea) {
+		this(dialog);
+		this.zoom = zoom;
+		this.zoomArea = zoomArea;
+
+	}
+
+	public ZoomBoxPanel(Zoomable dialog) {
+		this.dialog = dialog;
+		addMouseMotionListener(new MouseAdapter() {
+			@Override
+			public void mouseMoved(MouseEvent e) {
+				zoomPoint = e.getPoint(); 
+				// method paintComponent() called
+				repaint();	
+
+			}
+		});
+
+		addMouseListener(new MouseAdapter() {
+			@Override
+			public void mouseEntered(MouseEvent e) {
+				// method paintComponent() called
+				repaint();		     
+			}
+
+			@Override
+			public void mouseExited(MouseEvent e) {
+				zoomPoint = null;
+				// method paintComponent() called
+				repaint();
+			}
+
+		});
+	}
+
+	/**
+	 * This method paints the image and the zoom box.
+	 * If the mouse point is out of the image bounds the zoom box is not displayed
+	 */
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		if (dialog.getDisplayedImage() != null) {
+			Graphics2D g2d = (Graphics2D) g.create();
+			Point offset = getOffset();
+			g2d.drawImage(dialog.getDisplayedImage(), offset.x, offset.y, this);
+			if (zoomBoxEnabled && zoomPoint != null) {				     
+				BufferedImage zoomBuffer = updateBuffer(zoomPoint);      
+				if (zoomBuffer != null) {
+					Rectangle bounds = getZoomBounds();
+					Rectangle imgBounds = getImageBounds();
+					if(zoomPoint.x > imgBounds.x && zoomPoint.x < offset.x + imgBounds.width && zoomPoint.y > offset.y && zoomPoint.y < offset.y + imgBounds.height) {
+						g2d.drawImage(zoomBuffer, bounds.x, bounds.y, this);
+						g2d.setColor(Color.RED);
+						g2d.draw(bounds);				            
+					}
+				}
+			}
+			g2d.dispose();
+		}
+	}
+
+	/**
+	 * Getter of the zoom box visibility 
+	 * @return true if the zoom box is enabled, 
+	 * 		   false otherwise
+	 */
+	public boolean zoomBoxEnabled() {
+		return zoomBoxEnabled;
+	}
+
+	/**
+	 * Setter for the visibility of the zoom box.
+	 */
+	public void setZoomBoxEnabled(boolean zoomBoxEnabled) {
+		this.zoomBoxEnabled = zoomBoxEnabled;
+		repaint();
+	}
+
+	/**
+	 * Setter for the rate of zoom in the zoom box.
+	 */
+	public void setZoom(float zoom) {
+		this.zoom = zoom;
+		repaint();
+	}
+
+	/**
+	 * Zoom in the zoom box.
+	 */
+	public void zoomInBox() {
+		this.zoom += zoomStep;
+		repaint();
+	}
+
+	/**
+	 * Zoom out of the zoom box.
+	 */
+	public void zoomOutBox() {
+		if (this.zoom - this.zoomStep > zoomMin ) {
+			this.zoom -= this.zoomStep;
+		}
+		repaint();
+	}
+
+
+	/**
+	 * Increase the zoom box area by ZOOM_AREA_ADD.
+	 */
+	public void increaseZoomBoxArea() {
+		if(this.zoomArea + this.zoomAreaAdd <= zoomAreaMax) {
+			this.zoomArea += this.zoomAreaAdd;
+		}
+		repaint();
+	}
+
+
+	/**
+	 * Decrease the zoom box area by ZOOM_AREA_ADD.
+	 */
+	public void decreaseZoomBoxArea() {
+		if (this.zoomArea - this.zoomAreaAdd >= zoomAreaMin) {
+			this.zoomArea -= this.zoomAreaAdd;
+		}
+		repaint();
+	}
+
+
+	/**          
+	 * @return the offset of the image displayed in the panel
+	 */
+	protected Point getOffset() {
+		if (dialog.getDisplayedImage() == null) {
+			return new Point(0, 0);
+		}
+
+		int x = (getWidth() - dialog.getDisplayedImage().getWidth()) / 2;
+		int y = (getHeight() - dialog.getDisplayedImage().getHeight()) / 2;
+		return new Point(x, y);
+	}
+
+	/**
+	 * @return the bounds around the image displayed in the panel
+	 */
+	protected Rectangle getImageBounds() {
+		Rectangle bounds = new Rectangle(0, 0, 0, 0);
+		if (dialog.getDisplayedImage() != null) {
+			bounds.setLocation(getOffset());
+			bounds.setSize(dialog.getDisplayedImage().getWidth(), dialog.getDisplayedImage().getHeight());
+		} 
+		return bounds;
+	}
+
+	/**
+	 * This method creates the zoomed image around the mouse point.
+	 * 
+	 * @param p
+	 *           mouse point coordinates relative to the panel
+	 *
+	 * @return the zoomed image that fits the zoom box
+	 */
+	protected BufferedImage updateBuffer(Point p) {
+		if (zoomPoint == null) {
+			return null;
+		}
+
+		Rectangle bounds = getZoomBounds(); 
+		Point offset = getOffset(); 	
+		Image scaled;
+
+		// coordinates relative to image
+		bounds.x = bounds.x - offset.x;
+		bounds.y = bounds.y - offset.y;
+
+		// if out of bounds
+		if (bounds.x < 0 || bounds.y < 0 || bounds.width <= 0 || bounds.height <= 0) { 
+			return null; 
+		}
+
+		BufferedImage zoomBuffer = new BufferedImage(bounds.width, bounds.height, BufferedImage.TYPE_INT_ARGB); 
+		Graphics2D g2d = zoomBuffer.createGraphics();
+
+
+		scaled = dialog.getMatchingImage(bounds.x, bounds.y, bounds.width, bounds.height, zoom);
+
+		// if the zoom box is within image area
+		if(bounds.width == zoomArea && bounds.height == zoomArea) {
+			int srcx = (scaled.getWidth(null)-bounds.width)/2;
+			int srcy = (scaled.getHeight(null)-bounds.height)/2;
+			g2d.drawImage(scaled, 0,0, bounds.width, bounds.height, srcx, srcy, srcx +bounds.width, srcy + bounds.height, this);
+		}
+		// if the zoom box intersects with image area 
+		else {
+
+			// mouse point coordinates relative to image
+			int p1x = p.x - offset.x;
+			int p1y = p.y - offset.y;
+
+			int p2x;
+			int p2y;
+
+			// left
+			if(bounds.x == 0) {	
+				// mouse point coordinates relative to subimage 
+				p2x = p1x;
+				p2y = p1y - bounds.y;
+			}
+
+			// down
+			else if(bounds.y + bounds.height == dialog.getDisplayedImage().getHeight()) {     	
+				// mouse point coordinates relative to subimage 
+				p2x = p1x - bounds.x;
+				p2y = p1y - bounds.y;
+			}
+
+			// right
+			else if(bounds.x + bounds.width == dialog.getDisplayedImage().getWidth()) {
+
+				// mouse point coordinates relative to subimage
+				p2x = p1x - bounds.x;
+				p2y = p1y - bounds.y;
+			}   
+			// up
+			else {
+
+				// mouse point coordinates relative to subimage
+				p2x = p1x - bounds.x;
+				p2y = p1y;
+			}
+
+			// mouse point coordinates relative to zoomed subimage
+			int p3x = (int) (p2x*zoom);
+			int p3y = (int) (p2y*zoom);
+
+			// top left point of cropped area of the zoomed image
+			int p4x = p3x - (p2x);
+			int p4y = p3y - (p2y);
+
+			// specify the area of the zoomed image that needs to be drawn over the zoom box area 
+			g2d.drawImage(scaled, 0,0, bounds.width, bounds.height, p4x, p4y, p4x + bounds.width, p4y + bounds.height, this); 
+		}
+
+		g2d.dispose();
+		return zoomBuffer; 
+	}
+
+	/**
+	 * @return the bounds around the zoom box relative to the panel
+	 */
+	protected Rectangle getZoomBounds() {
+		Rectangle bounds = null;
+		if (zoomPoint != null && dialog.getDisplayedImage() != null) {
+
+			// zoom area created in such way so that mouse point is centered in the zoom box
+			int xPos = zoomPoint.x - (zoomArea / 2);
+			int yPos = zoomPoint.y - (zoomArea / 2);
+
+			Rectangle zoomBounds = new Rectangle(xPos, yPos, zoomArea, zoomArea);
+			Rectangle imageBounds = getImageBounds();
+
+			// create the zoom box as intersection of the image bounds and zoom bounds
+			bounds = imageBounds.intersection(zoomBounds);
+
+		}
+		return bounds;
+	}
+
+}
+

src/mustic/gui/tools/Zoomable.java

+package mustic.gui.tools;
+
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+
+/**
+ * Allow an object that displays a BufferedImage to add a ZoomBox to
+ * the BufferedImage
+ * 
+ * @author Marija Kirandjiska
+ *
+ */
+public interface Zoomable {
+	
+	/**
+	 * Return the image displayed by the object
+	 * 
+	 * @return the image
+	 */