//	Author: C Dare-Edwards
//	
//	cdare-edwards@mcsoftware.com.au
//	
//  Copyright Conrad Dare-Edwards   
//
//  The copyright to the computer program (s) herein
//  is the property of Conrad Dare-Edwards. The program (s)
//  may be used and/or copied only with the written 
//  permission of Conrad Dare-Edwards or in accordance 
//  with the terms and conditions stipulated in the 
//  agreement/contract under which the program (s) have
//  been supplied.

import java.awt.*;
import java.awt.image.ImageObserver;
import TreeControl;

public class Item  extends java.lang.Object  
{
	
	// constants for activate
	static final int ACT_DBCLICK = 1;
	static final int ACT_CLICK = 2;
	static final int ACT_HIGHLIGHT = 3;

	static final int DRAW_FULL = 1;
	static final int DRAW_HIGHLIGHT = 2;
	static final int DRAW_CLEAR = 4;
	static final int DRAW_SECONDIMAGE = 8;
	
	// varibles
	String m_title;	// text string object title
	Image m_icon;	// displayed icon
	Image m_highlightIcon; // second image for hightlighting

	ItemAction m_action; // activation object

	Rectangle m_rect;	// drawing area

	////////////////////////////////////////////////
	// 	public Item( String title )
	// construction
	public Item( String title )
	{
		m_title = title;

		// if( m_title == null ) m_title = "";
		m_rect = new Rectangle();
	}

/* constructors that are not used removed to reduce code sixe

   public Item( String title, Image icon )
	{
		m_title = title;
		m_icon = icon;
		m_rect = new Rectangle();
	}

	public Item( String title, Image icon, ItemAction action)
	{
		m_title = title;
		m_icon = icon;
		m_action = action;
		m_rect = new Rectangle();
	}
*/
	//////////////////////////////////////////////////
	// 	public Item( Item item )
	// copy constructor
	// note action is a reference copy any changes will effect both items
	public Item( Item item )
	{
		m_title = item.getTitle();
		m_icon = item.getIcon();
		m_action = item.getAction();
		m_rect = new Rectangle();
		m_rect.equals( item.getRect() );
		m_highlightIcon = item.getHighlightIcon();
	}


	//////////////////////////////////////////////////
	// 	public void draw( Graphics g, ImageObserver ob, int highlight )
	//  draw ourselves onto the screen
	//	DRAW_FULL			complete redraw
	//  DRAW_HIGHLIGHT		redraw with highlight colors
	//  DRAW_CLEAR			redraw clearing highlight
	//  DRAW_SECONDIMAGE	additional flag to display highlight image	
	public void draw( Graphics g, TreeControl ob, int highlight )
	{
		int offsetx = m_rect.x;
		int offsety = m_rect.y;

		// if not a full redraw then we need to clear out backrground
		if ( (highlight & DRAW_CLEAR) > 0 || (highlight & DRAW_HIGHLIGHT) > 0  )
		{
			ob.clearRect( g, m_rect );
		}

		// if icon draw icon
		if( m_icon != null )
		{
			Image item_icon = m_icon; 
	
			int image_width = item_icon.getWidth( ob );
			int image_height = item_icon.getHeight( ob );

			// only bother if we have vaild image sizes
			if( image_width > 0 && image_height > 0 )
			{

				if( m_highlightIcon != null && (highlight & DRAW_HIGHLIGHT) >0 )
					item_icon = m_highlightIcon;

				// centre icon verticaly
				offsety += ((m_rect.height - image_height)/2); 

				// draw icon
				g.drawImage( item_icon, offsetx, offsety, ob);

				// shift offset to compensate for image
				offsetx += image_width;
			}
		}

		// change color if highlighted
		if( (highlight & DRAW_HIGHLIGHT) >0 && m_title.length() != 0)
		{	
			g.setColor( ob.m_highColour ); // red
			
			g.fillRect( 
				offsetx, 
				m_rect.y, 
				(m_rect.width - (offsetx - m_rect.x)), 
				m_rect.height );
			
			g.setColor( ob.m_highTextColour );
		}
		else // setup colors for defualt draw
		{
			g.setColor( ob.m_textColour );
		}

		offsety = m_rect.y;
		offsetx += 2;
		
		// draw title text
		offsety += ((m_rect.height - (g.getFontMetrics()).getHeight()) /2 );
		offsety += (g.getFontMetrics()).getAscent();

		g.drawString(m_title, offsetx, offsety );
	}

	//////////////////////////////////////////////////
	// 	public boolean activate( int activate_type, Event )
	// activate item into some form of action input
	// doesn't use the Event object 
	public boolean activate( int activate_type, Event event )
	{
		if( m_action != null )
		{
			m_action.showStatus();  // activate status bar

			if( activate_type == ACT_CLICK || activate_type == ACT_DBCLICK )
				m_action.showDocument(); // load url
		}

		return false;	// no redraw
	}

	//////////////////////////////////////////////////
	// 	public Item hitTest( int x, int y )
	// does x,y fall within the rectangle
	public Item hitTest( int x, int y )
	{
		if( m_rect.inside( x,y ) )
			return this;
		else return null;
	}

	//////////////////////////////////////////////////
	//	public Rectangle layout( int x, int y )
	// layout item for redawing
	public Rectangle layout( int x, int y )
	{
		m_rect.move(x,y);
		return m_rect;
	}

	//////////////////////////////////////////////////
	// 	public void initalise( FontMetrics fm, ImageObserver ob )
	// computes the widht and height of item
	// intalise drawing area this should be called after 
	// construction and after any changes to title or icon
	public void initalise( FontMetrics fm, ImageObserver ob )
	{
		// find width and setup
		int width = 4;
		int height = 0;

		if( m_icon != null )
		{
			width += m_icon.getWidth( ob );
			height = m_icon.getHeight( ob );
		}
		
		width += fm.stringWidth( m_title );
		
		int fontHeight = (fm.getLeading() + fm.getMaxAscent() + fm.getMaxDescent());

		if( height < fontHeight ) 
				height = fontHeight; 

		// set rectangle
		m_rect.width = width;
		m_rect.height = height;
	}

	//////////////////////////////////////////////////
	// 	public Rectangle getRect(  )
	// get the drwing area rectangle 
	public Rectangle getRect(  )
	{
		return m_rect;
	}

	//////////////////////////////////////////////////
	// 	public int getWidth() 
	// get width in pixels of item
	public int getWidth() 
	{ 
		return m_rect.width; 
	}

	//////////////////////////////////////////////////
	// 	public int getHeight() 
	// get height in pixels of item
	public int getHeight() 
	{ 
		return m_rect.height; 
	}

	//////////////////////////////////////////////////
	// 	public String getTitle( )
	// get item title
	public String getTitle( )
	{
		return m_title;	
	}

	//////////////////////////////////////////////////
	// 	public void setTitle( String title )
	// change title to somthing else
	public void setTitle( String title )
	{
		m_title = title;	
	}

	//////////////////////////////////////////////////
	//	public ItemAction getAction( )
	// get action 
	public ItemAction getAction( )
	{
		return m_action;
	}

	//////////////////////////////////////////////////
	//	public void setAction( ItemAction action )
	// set action
	public void setAction( ItemAction action )
	{
		m_action = action;
	}

	//////////////////////////////////////////////////
	//	public Image getIcon( )
	// get item icon
	public Image getIcon( )
	{
		return m_icon;	
	}

	//////////////////////////////////////////////////
	//	public void setIcon( Image icon )
	// change icon to somthing else
	public void setIcon( Image icon )
	{
		m_icon = icon;	
	}

	//////////////////////////////////////////////////
	// public Image getHighlightIcon( )
	// get second image
	public Image getHighlightIcon( )
	{
		return m_highlightIcon;	
	}

	//////////////////////////////////////////////////
	// 	public void setHighlightIcon( Image icon )
	//  change second image 
	public void setHighlightIcon( Image icon )
	{
		m_highlightIcon = icon;	
	}


} // end item