selection.java

用Java开发的、实现类似Visio功能的应用程序源码

   			Port port	=((AbstractShape)obj).pickPort(x,y);
   			if (port!=null)
   				return port;
   		}
   	}
   	return null;
   }

 	   
   /**
    *   Remove a port from this selection.
    *   @param port A port to be removed.
    *
    */ 	
   public boolean removePort(Port port){
   	AbstractObject obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj	=(AbstractObject)it.next();
   		if (obj!=null && obj instanceof AbstractShape){
   			if (((AbstractShape)obj).removePort(port))
   				return true;
   		}
   	}
   	return false;
   }

   /**
    *   Get all the arrow format of objects in this selection.
    * 
    *   @return  The arrow format.
    *
    */ 	
   public Arrow getArrow(){
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj	=(AbstractShape)it.next();
   		Arrow arrow	=obj.getArrow();
   		if (arrow!=null)
   			return arrow;
   	}
   	return null;
   }

   /**
    *   Set all the arrow format of object in this selection.
    *
    *   @param arrow  A new arrow format object.
    *
    */ 	
   public void setArrow(Arrow arrow){
   	if (arrow==null)
   		return;
   		
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj	=(AbstractShape)it.next();
   		obj.setArrow(arrow);
   	}
   }



   /**
    *   Get all the line format of objects in this selection.
    * 
    *   @return  The line format.
    *
    */ 	
   public LineFormat getLineFormat(){
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj			=(AbstractShape)it.next();
   		LineFormat lineFormat	=obj.getLineFormat();
   		if (lineFormat!=null)
   			return lineFormat;
   	}
   	return null;
   }


   /**
    *   Set the line format of objects in this selection.
    *
    *   @param lineFormat A new line format.
    *
    */ 	
   public void setLineFormat(LineFormat lineFormat){
   	if (lineFormat==null)
   		return;
   		
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj			=(AbstractShape)it.next();
   		obj.setLineFormat(lineFormat);
   	}
   }


   /**
    *   Get all the fill format of objects in this selection.
    * 
    *   @return  The fill format.
    *
    */ 	
   public FillFormat getFillFormat(){
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj			=(AbstractShape)it.next();
   		FillFormat fillFormat	=obj.getFillFormat();
   		if (fillFormat!=null)
   			return fillFormat;
   	}
   	return null;
   }


   /**
    *   Set the fill format of objects in this selection.
    *
    *   @param fillFormat A new fill format.
    *
    */ 	
   public void setFillFormat(FillFormat fillFormat){
   	if (fillFormat==null)
   		return;
   		
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj			=(AbstractShape)it.next();
   		obj.setFillFormat(fillFormat);
   	}
   }



   /**
    *   Get all the font format of objects in this selection.
    * 
    *   @return  The font format.
    *
    */ 	
   public FontFormat getFontFormat(){
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj			=(AbstractShape)it.next();
   		FontFormat fontFormat	=obj.getFontFormat();
   		if (fontFormat!=null)
   			return fontFormat;
   	}
   	return null;
   }


   /**
    *   Set the font format of objects in this selection.
    *
    *   @param fontFormat A new font format.
    *
    */ 	
   public void setFontFormat(FontFormat fontFormat){
   	if (fontFormat==null)
   		return;
   		
   	AbstractShape obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj			=(AbstractShape)it.next();
   		obj.setFontFormat(fontFormat);
   	}
   }



  /**
    *   Flip objects of current selection. We make a up-down flip here.
    *   @return the flip baseY coordinate.
    */ 	
  public double flipObjects(){
    	Rect rect	=getBounds();
    	double baseX	=rect.getX() + rect.getWidth()/2;
    	double baseY	=rect.getY() + rect.getHeight()/2;
    	Iterator it	=m_objectList.getList().iterator();
    	while (it!=null && it.hasNext()){
    		Object obj	=it.next();
    		if (obj!=null && obj instanceof AbstractShape){
    			AbstractShape shape	=(AbstractShape)obj;
    			if (!shape.isDisableMotion()){
    				shape.flipBy(baseY);
    			}
    		}
    	}
    	return baseY;
  }

   
  /**
    *   Mirror objects of current selection. We make a left-right mirror here.
    *   @return the mirror baseX coordinate.
    */ 	
  public double mirrorObjects(){
    	Rect rect	=getBounds();
    	double baseX	=rect.getX() + rect.getWidth()/2;
    	double baseY	=rect.getY() + rect.getHeight()/2;
    	Iterator it	=m_objectList.getList().iterator();
    	while (it!=null && it.hasNext()){
    		Object obj	=it.next();
    		if (obj!=null && obj instanceof AbstractShape){
    			AbstractShape shape	=(AbstractShape)obj;
    			if (!shape.isDisableMotion()){
    				shape.mirrorBy(baseX);
    			}
    		}
    	}
    	return baseX;
  }

      

  /**
    *   Move current selection by a new offset.
    * 
    *   @param x, y A new moving offset.
    */ 	
  public void moveBy(double x, double y){
   	AbstractObject obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj	=(AbstractObject)it.next();
   		if (obj!=null && obj instanceof AbstractShape){
   			AbstractShape shape	=(AbstractShape)obj;
   			if (!shape.isDisableMotion()){
   				shape.moveBy(x,y);
   			}
   		}
   	}
  }
  
  
  /**
    *   Get a move offset(x,y) from source position to destination position.
    * 
    *   @param oldx,oldy Source position of this selection.
    *   @param newx,newy Destination position of this selection.
    *
    *   @return The move offset point.
    *
    */ 	
  public JFPoint getMovePos(double oldx, double oldy, double newx, double newy){
	

	GridFormat gridFormat	=m_drawCanvas.getGridFormat();
	
	double xOffset		=newx-oldx;
	double yOffset		=newy-oldy;
	
	if (!gridFormat.getSnapToGrid()){
		return new JFPoint(xOffset,yOffset);
	}else{
		Rect bounds	=getBounds();
		double x	=bounds.getX()+xOffset;
		double y	=bounds.getY()+yOffset;
		
		JFPoint snapPos =gridFormat.getSnapPos(x,y);
		
		return new JFPoint(snapPos.getX()-bounds.getX(),snapPos.getY()-bounds.getY());
	}
  	
  }


  /**
    *   Move current selection at a new position
    * 
    *   @param x, y A new position.
    *   @param g		Graphics context to draw selections.
    *
    */ 	
  public void moveTo(double x, double y,Graphics g){

  	Graphics2D g2	=(Graphics2D)g;
 	g2.setXORMode(Color.white);
 	//if moved already, then re-draw it to eliminate the xor shape.
  	if (!m_lastPoint.equals(m_originalPoint,true)){
  		draw(g,true);
  	}

	JFPoint movePos =getMovePos(m_lastPoint.getX(),m_lastPoint.getY(),x,y);
	
	//draw a new xor shape of selection(but avoided to draw on original position).  	
  	moveBy(movePos.getX(),movePos.getY());

	//avoid drawing on the original position.
  	if (!m_originalPoint.equals(x,y,true)){
  		draw(g,true);
  	}
	
	//save the new position.
  	m_lastPoint.setX(x);
  	m_lastPoint.setY(y);
  }



  /**
    *   get first object in selection.
    */ 	
  public AbstractShape getFirstObj(){
 	AbstractObject obj=null;
	try{
	   	obj = m_objectList.getByIndex(0);
	   	if (obj==null || !(obj instanceof AbstractShape))
	   		return null;
	}catch(Exception e){
		return null;
	}
	return (AbstractShape)obj;
  }

  /**
    *   get current dragging object.
    */ 	
  private AbstractShape getDraggingObj(){
 	//get the current shape,only one shape in selection while in node dragging state.
 	return getFirstObj();
  }

   /**
    *   Get internal label of one shape in the selection that intersects with point pnt.
    * 
    *   @param  pnt A JFPoint used to test intersection.
    *   @param  g  A graphics text used necessary in label intersection operation.
    *   @return Internal label of current shape.
    *
    */ 	
   public Label  labelIntersects(Graphics g,JFPoint pnt){
   	AbstractObject obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj	=(AbstractObject)it.next();
   		if (obj!=null && obj instanceof AbstractShape){
   			Label label	=((AbstractShape)obj).labelIntersects(g,pnt);
   			if (label!=null)
   				return label;
   		}
   	}
   	return null;
   }

  /**
    *   Drag current label.
    * 
    *   @param lastx, lasty Last mouse position.
    *   @param newx, newy New mouse position.
    *
    *   @param g	Graphics context to draw selections.
    *
    */ 	
  public void dragLabel(double lastx, double lasty, double newx, double newy,Graphics g){
  	Label moveLabel=getMoveLabel();
	if (moveLabel==null)
		return;

  	Graphics2D g2	=(Graphics2D)g;
 	g2.setXORMode(Color.white);

	if ((int)lastx!=(int)newx || (int)lasty!=(int)newy)
		moveLabel.drawPicked(g,true);
				
	moveLabel.moveBy(newx-lastx,newy-lasty);
 
 	if ((int)lastx!=(int)newx || (int)lasty!=(int)newy)
		moveLabel.drawPicked(g,true);
  }



   /**
    *   Get which node of one shape in the selection that intersects with point pnt.
    * 
    *   @param  pnt A JFPoint used to test intersection.
    *   @param  usage Purpose to get a node intersected, e.g. move or rotate. 
    *
    *   @return A node of current shape.
    *
    */ 	
   public Node  nodeIntersects(JFPoint pnt,int usage){
   	AbstractObject obj;
   	Iterator it=m_objectList.getList().iterator();
   	while (it!=null && it.hasNext()){
   		obj	=(AbstractObject)it.next();
   		if (obj!=null && obj instanceof AbstractShape){
   			Node node	=((AbstractShape)obj).nodeIntersects(pnt,usage);
   			if (node!=null)
   				return node;
   		}
   	}