label.java

用Java开发的、实现类似Visio功能的应用程序源码

/**
 *    $Id:Label.java $
 *
 *    Copyright 2004 ~ 2005  JingFei International Cooperation LTD. All rights reserved.
 *
 */
package com.jfimagine.jfgraph.shape.base;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Color;
import java.awt.geom.Rectangle2D;
import java.awt.geom.AffineTransform;
import java.awt.Font;
import java.awt.font.FontRenderContext;    
import java.awt.font.TextLayout;    
import java.awt.BasicStroke;
import java.awt.image.BufferedImage;
import java.awt.RenderingHints;


import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import com.jfimagine.jfdom.Document;
import com.jfimagine.jfdom.Element;

import com.jfimagine.utils.commonutil.CommonUtil; 
import com.jfimagine.utils.commonutil.Base64;

import com.jfimagine.jfgraph.shape.base.AbstractObject;
import com.jfimagine.jfgraph.shape.base.ShapeConst;
import com.jfimagine.jfgraph.shape.base.JFVersion;

import com.jfimagine.jfgraph.geom.GeomConst;
import com.jfimagine.jfgraph.geom.JFPoint;
import com.jfimagine.jfgraph.geom.Rect;
import com.jfimagine.jfgraph.shape.decorate.FontFormat;


/**
 * Label Class. A label is to label the text of a shape.
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.00 $
 */  
 public class Label extends AbstractObject {

   /**
    *   A XML string tag represents a jflabel
    */
   public  static final String	 XML_LABEL		="Label";

   /**
    *   A XML string tag represents the x coordinate offset of this label
    */
   public  static final String   XML_XOFFSET		="xOffset";
   /**
    *   A XML string tag represents the y coordinate offset of this label
    */
   public  static final String   XML_YOFFSET		="yOffset";
   /**
    *   A XML string tag represents the text of this label
    */
   public  static final String   XML_TEXT		="text";
   /**
    *   A XML string tag represents the if visible of this label
    */
   public  static final String   XML_VISIBLE		="visible";
   /**
    *   A XML string tag represents the if movable of this label
    */
   public  static final String   XML_MOVABLE		="movable";


   /**
    *   A point for x,y coordinates of the left-top corner of the label.
    */
   protected	JFPoint	m_labelPoint	=new JFPoint();

   /**
    *   Label text.
    */
   protected	String m_text		="";
   
   /**
    *   Label visible or invisible.
    */
   protected	boolean m_visible	=true;


   /**
    *   Label movable. e.g. Not movable in JFLabelLine.
    */
   protected	boolean m_movable	=true;

   /**
    *   A parent object of this label.
    */
   protected	AbstractObject	m_parent;


   /**
    *   A font format of this label.
    */
   protected	Font m_font	=new Font(FontFormat.FONTNAME_DEFAULT, Font.PLAIN, FontFormat.FONTSIZE_DEFAULT);


   /**
    *   Constructor for Label
    */
   public Label(){
   	setObjectType(ShapeConst.SHAPETYPE_LABEL);
   	setXMLTag(XML_LABEL);
   }	

   /**
    *   Constructor for Label
    */
   public Label(double x,double y){
   	setObjectType(ShapeConst.SHAPETYPE_LABEL);
   	setXMLTag(XML_LABEL);
   	m_labelPoint.setX(x);
   	m_labelPoint.setY(y);
   }	

   /**
    *   Constructor for Label
    */
   public Label(JFPoint pnt){
   	setObjectType(ShapeConst.SHAPETYPE_LABEL);
   	setXMLTag(XML_LABEL);
   	m_labelPoint.setValue(pnt);
   }	


   /**
    *   Get parent object of this label.
    *   @return parent object.
    */
   public	AbstractObject	getParent(){
   	return m_parent;
   }

   /**
    *   Set parent object of this label.
    *   @param A new parent object.
    */
   public void	setParent(AbstractObject obj){
   	m_parent	=obj;
   }


   /**
    *   Get the x offset of current label. <br>
    *
    *   @return  The x offset of current label.
    *
    */ 	
   public double getXOffset(){
   	return m_labelPoint.getX();
   }

   /**
    *   Set the x offset of current label. <br>
    *
    *   @param  xOffset The x offset of current label.
    *
    *   @return  No return.
    *
    */ 	
   public void setXOffset(double xOffset){
   	m_labelPoint.setX(xOffset);
   }


   /**
    *   Get the y offset of current label. <br>
    *
    *   @return  The y offset of current label.
    *
    */ 	
   public double getYOffset(){
   	return  m_labelPoint.getY();
   }

   /**
    *   Set the y offset of current label. <br>
    *
    *   @param  yOffset The y offset of current label.
    *
    */ 	
   public void setYOffset(double yOffset){
   	m_labelPoint.setY(yOffset);
   }


   /**
    *   Get the actual draw point of this label.
    *
    *   @param g A graphics context used to measure.
    *   @param useStrokeAndFill If use stroke and fill drawing format
    *   @return The actual draw point.
    *
    */ 	
   public JFPoint getDrawPoint(Graphics g,boolean useStrokeAndFill){

   	if (m_text==null || m_text.length()==0)
   		return new JFPoint();

   	Rectangle2D bounds	=getBounds2D(g); 
   	double zoom		=getZoomScale();
   	float x	=(float)((m_labelPoint.getX() * zoom -bounds.getWidth()/2) );
   	float y	=(float)((m_labelPoint.getY())* zoom);
   	if (useStrokeAndFill)
   		y	= (float)(y-bounds.getHeight());
   	
   	return new JFPoint(x,y);		
   }


   /**
    *   Get the point of current label. <br>
    *
    *   @return  The position of current label.
    *
    */ 	
   public JFPoint getLabelPoint(){
   	return m_labelPoint;
   }

   /**
    *   Set the point of current label. <br>
    *
    *   @param  pnt  The point of current label.
    *
    */ 	
   public void setLabelPoint(JFPoint pnt){
   	m_labelPoint.setValue(pnt);
   }

   /**
    *   Get if visible of current label. <br>
    *
    *   @return  True if visible, false otherwise.
    *
    */ 	
   public boolean getVisible(){
   	return m_visible;
   }

   /**
    *   Set the visible of current label. <br>
    *
    *   @param  visible A new visible state of current label.
    *
    */ 	
   public void setVisible(boolean visible){
   	m_visible	=visible;
   }


   /**
    *   Get if movable of current label. <br>
    *
    *   @return  True if movable, false otherwise.
    *
    */ 	
   public boolean getMovable(){
   	return m_movable;
   }

   /**
    *   Set the movable of current label. <br>
    *
    *   @param  movable A new movable state of current label.
    *
    */ 	
   public void setMovable(boolean movable){
   	m_movable	=movable;
   }


   /**
    *   Get the text of current label. <br>
    *
    *   @return  The text of current label.
    *
    */ 	
   public String getText(){
   	return m_text;
   }

   
   /**
    *   Set the text of current label. <br>
    *
    *   @param  text  The text of current label.
    *
    */ 	
   public void setText(String text){
   	if (text==null) text="";
   	m_text	=text;
   }

   /**
    *   Get the font of current label. <br>
    *
    *   @return  The font of current label.
    *
    */ 	
   public Font getFont(){
   	return m_font;
   }

   /**
    *   Get a zoomed font of current label. <br>
    *
    *   @return  A new zoomed font of current label.
    *
    */ 	
   public Font getZoomedFont(){
   	double zoom	=getZoomScale();
   	
   	if (zoom==1.0)
   		return m_font;
   	else
   		return new Font(m_font.getFontName(), m_font.getStyle(), (int)(m_font.getSize() * zoom));
   }


   /**
    *   Set the font of current label. <br>
    *
    *   @param  font  The font of current label.
    *
    */ 	
   public void setFont(Font aFont){
   	if (aFont==null)
   		m_font	=new Font(FontFormat.FONTNAME_DEFAULT, Font.PLAIN, 12);
   	else
   		m_font	=new Font(aFont.getFontName(), aFont.getStyle(), aFont.getSize());
   }

  
   
   /**
    *   Set the value of current label. <br>
    *
    *   @param  aLabel  A new label value.
    *
    */ 	
   public void setValue(Label aLabel){
   	if (aLabel!=null){
		m_labelPoint.setValue(aLabel.m_labelPoint);
		m_text		=aLabel.m_text;
		m_visible	=aLabel.m_visible;
		m_movable	=aLabel.m_movable;
		m_font		=new Font(aLabel.m_font.getFontName(),aLabel.m_font.getStyle(),aLabel.m_font.getSize());
	}
   }

   /**
    *   Get the bounds of this label.
    *
    *   @return The bounds rectangle of this label.
    *
    */