layermenu.java

JaNet: Java Neural Network Toolkit resume: A well documented toolkit for designing and training, a

////////////////////////////////////////////////////////////////////////////////////  
//  
//  Copyright (C) 1996 L.  Patocchi & W.Gander
//
//  This program is free  software;  you can  redistribute  it and/or  modify it
//  under the terms of the GNU General  Public  License as published by the Free
//  Software  Foundation;  either  version 2 of the License, or (at your option)
//  any later version.
//
//  This program is  distributed in the hope that it will be useful, but WITHOUT
//  ANY  WARRANTY;  without  even the implied  warranty  of  MERCHANTABILITY  or
//  FITNESS FOR A PARTICULAR  PURPOSE.  See the GNU General  Public  License for
//  more details.
//
//  You should have received a copy of the GNU General Public License along with
//  this program; if not, write to the Free Software  Foundation, Inc., 675 Mass
//  Ave, Cambridge, MA 02139, USA.
//
//  Contacts:
//  
//    Project Supervisor
//      W.Hett       [e-mail]
//  
//    Authors
//      W.Gander     [e-mail]
//      L.Patocchi   [e-mail]
//
//  Documentation can be found at:
//
//      http://www.isbiel.ch/Projects/janet/index.html
//
////////////////////////////////////////////////////////////////////////////////////
//
// File : layerMenu.java
//
package jaNet.backprop.gui;

import java.awt.*;
import java.util.*;

class layerMenu extends Window{
	private Frame 			dearParentFrame;
	private Component 		dearParentComponent;
	public  int				myX, myY;
	public  int				width, height;
	public 	int				horizontalInset;
	public 	int				verticalInset;
	public	int				xPositionWithInc, yPositionWithInc;
	
	// components
	private String 			menuLabel;
	private int				menuLabelWidth, menuLabelHeight;
	private Vector 			menuItems;
	
	private int				currentSelection;
	
	private boolean			iHadMove = false;

	public layerMenu(Frame frame, Component component, String label){
		super(frame);
		dearParentFrame 	= frame;
		dearParentComponent = component;
		
		menuLabel 			= label;
		menuLabelWidth		= getStringWidth(dearParentComponent.getGraphics(),menuLabel);
		menuLabelHeight		= getStringHeight(dearParentComponent.getGraphics());
		
		horizontalInset		= 5;
		verticalInset		= 2;
		
		width = menuLabelWidth + 2*horizontalInset +2;
		if(width < 75) width = 75;
		height = menuLabelHeight + 2*verticalInset +2;
		if(height < 20) height = 20;
		
		currentSelection = -1;
		
		menuItems = new Vector();
	}

	public void show(int x, int y, String label){
		Graphics g = dearParentFrame.getGraphics();
		menuLabel 			= label;
		menuLabelWidth		= getStringWidth(g,menuLabel);
		menuLabelHeight		= getStringHeight(g);

		xPositionWithInc 	= x;
		yPositionWithInc	= y;

		// recompute position
		myX = x;
		myY = y ;
		Component temp = dearParentComponent;
		while(temp != null){
			myX += temp.location().x;
			myY += temp.location().y;
			temp = temp.getParent();
		}
		myX -= dearParentFrame.insets().left;
		myY -= + menuLabelHeight + 2*verticalInset +2;
		move(myX, myY);
		
		// recompute size
		for(int i=0; i<menuItems.size(); i++)
			if(getItem(i).getLabelWidth(g)+ 2*horizontalInset +2 > width) width = getItem(i).getLabelWidth(g)+ 2*horizontalInset +2;
		height = menuLabelHeight + 2*verticalInset +2;
		if(height < 20) height = 20;
		for(int i=0; i<menuItems.size(); i++)
			height += getItem(i).getHeight(); 
		resize(width, height);

		super.show(); 
	}

	public void update(Graphics g){
		paint(g);
		move(myX, myY);

	}

	public  void paint(Graphics g){
		int 		w = size().width;
		int 		h = size().height;
		Font 		tempFont = g.getFont();
		
		move(myX, myY);
		int y=0;
		
		// create an image to avoid flicks
		Image image = createImage(w, h);
		Graphics g2 = image.getGraphics();
		
		g2.setColor(Color.lightGray);
		g2.fill3DRect(0,0, width   , height  ,true);
		g2.setColor(Color.black);
		g2.setFont(new Font("Helvetica",Font.BOLD , 12));
		g2.drawString(menuLabel, (width-menuLabelWidth)/2, menuLabelHeight );
		g2.setFont(tempFont);
		y = menuLabelHeight+ 2*verticalInset +2;
		for (int i=0; i<menuItems.size(); i++){
			y += getItem(i).drawMenuItem(g2,y, width);
		}
		
		g.drawImage(image,  0,0, this);
	}

	public boolean handleEvent(Event event) {	
		// what a terrible hack for WindowShit
		if(event.id == Event.MOUSE_UP){
			if(iHadMove) return dearParentComponent.handleEvent(event);
			return true;
		}
		if(event.id == Event.MOUSE_DRAG) iHadMove = true;
		
		// pass only UP or DRAG
		if(event.id == Event.MOUSE_UP || event.id == Event.MOUSE_DRAG)
			return dearParentComponent.handleEvent(event);
		
		return super.handleEvent(event);
	}

	public boolean handlePrivateEvent(Event event) {
		move(myX, myY);

    	if (event.id == Event.MOUSE_DRAG) {
			int x = event.x - xPositionWithInc;
			int y = event.y - yPositionWithInc;
			
			//System.out.println(""+x+" , "+y);
			
			if (x<0 || x > width){
				if (currentSelection != -1){
					getItem(currentSelection).deselect();
					currentSelection = -1;
					repaint();
				}
				return super.handleEvent(event);;
			}
			for (int i=0; i<menuItems.size(); i++){
				if (getItem(i).isSelectable(y)){
					if (i != currentSelection){
						if (currentSelection != -1) getItem(currentSelection).deselect();
						currentSelection = i;
						getItem(currentSelection).select();
						repaint();
					}
					return super.handleEvent(event);;
				}
			}
			if (currentSelection != -1){
				getItem(currentSelection).deselect();
				currentSelection = -1;
				repaint();
			}

			
		}
		
    	return true;
	}

	public int countItems(){
		return menuItems.size();
	}

	public layerMenuItem getItem(int index){
		return (layerMenuItem)menuItems.elementAt(index);
	}
	
	public int getSelection(){
		return currentSelection;
	}
	
	public void add(layerMenuItem menuItem){
		menuItems.addElement(menuItem);
	}
	
	public layerMenuItem add(String label){
		layerMenuItem menuItem = new layerMenuItem(label);
		add(menuItem);
		return menuItem;
	}

	public void addSeparator(){
		layerMenuItem menuItem = new layerMenuItem();
		add(menuItem);
	}
  
	public int getStringWidth(Graphics g, String str){
		FontMetrics fm = g.getFontMetrics(g.getFont());
        return fm.stringWidth(str);
	}
	public int getStringHeight(Graphics g){
		FontMetrics fm = g.getFontMetrics(g.getFont());
        return fm.getHeight();
	}
	public synchronized void remove(MenuComponent item){
		int index = menuItems.indexOf(item);
		if (index >= 0) remove(index);
	}
	
	public synchronized void remove(int index){
		layerMenuItem dummy = getItem(index);
		menuItems.removeElementAt(index);
	}


}