mypanel.java

Java画板

	     */
	    public void addShape( Object element) {
	        shapes.add( element );
	        undo.clear();
	      } 
	    
	    /**
	     * 保存文件时获取相关数据
	     * @return
	     */
	    public String getShapes() {
	        int size = shapes.size();
	        StringBuffer buffer = new StringBuffer();
	        for (int i=0; i<size; i++) {
	            MyShape shape = (MyShape) shapes.get(i);
	            if(shape.isImage())
	            {
	              ((CusImage)shape).setSaveImage();
	            }
	            buffer.append("\n");
	            buffer.append(shape.getClass().getName());
	            buffer.append("\t");
	            buffer.append(shape.getShapeData());
	        }
	        return buffer.toString();
	    }
	    
	    /**
	     * 打开文件时设置图片的相关数据
	     * @param list
	     * @throws Exception
	     */
	    public void setShapes(ArrayList list) throws Exception {
	        try {
	            int size = list.size();
	            for (int i=0; i<size; i++) {
	                String[] split2 = ((String) list.get(i)).split("\t");
	                MyShape shape;
	                if (split2[0].equals("test.paint.Line")) {
	                    shape = new Line();
	                } else if (split2[0].equals("test.paint.Rect")) {
	                    shape = new Rect();
	                } else if (split2[0].equals("test.paint.Oval")) {
	                    shape = new Oval();
	                } else if (split2[0].equals("test.paint.Diamond")) {
	                    shape = new Diamond();
	                } else if (split2[0].equals("test.paint.PolyLine")) {
	                    shape = new PolyLine();
	                } else if (split2[0].equals("test.paint.Eraser")) {
	                    shape = new Eraser(this);
	                } else if (split2[0].equals("test.paint.Word")) {
	                    shape = new Word();
	                } else if (split2[0].equals("test.paint.RoundRect")){
	                	shape = new RoundRect();
	                	
	                } 
	                else {
	                    throw new Exception("Invalid Shape Data!");
	                }
	                shape.setShapeData(split2[1]);
	                list.set(i, shape);
	            }
	            shapes = list;
	            repaint();
	        } catch (Exception e) {
	            e.printStackTrace();
	            throw e;
	        }
	    }
	    
	  
	    protected void paintComponent(Graphics g) {
	        super.paintComponent(g);
	        int size = shapes.size();
	        Graphics2D g2d = (Graphics2D) g;
	        for (int i=0; i<size; i++) {
	            ((MyShape) shapes.get(i)).draw(g2d);
	        }
	    }
	    
	    /**
	     * 松开鼠标时产生的事件
	     */
	    public void mousePressed(MouseEvent e) {
	        if (e.getButton() == MouseEvent.BUTTON1 ) {
	            switch (tool) {
	                case TOOL_LINE:
	                	flag=0;
	                    currentShape = new Line(this.getForeground(), 
	                                STROKES[strokeIndex], e.getX(), e.getY());
	                    break;
	                case TOOL_RECT:
	                	flag=0;
	                    currentShape = new Rect(this.getForeground(), 
	                                STROKES[strokeIndex], e.getX(), e.getY(), m );
	                    break;
	                case TOOL_OVAL:
	                	flag=0;
	                    currentShape = new Oval(this.getForeground(), 
	                                STROKES[strokeIndex], e.getX(), e.getY(), m );
	                    break;
	                case TOOL_DIAMOND:
	                	flag=0;
	                    currentShape = new Diamond(this.getForeground(), 
	                                STROKES[strokeIndex], e.getX(), e.getY(),m );
	                    break;
	                case TOOL_PENCIL:
	                	flag=0;
	                    currentShape = new PolyLine(this.getForeground(), 
	                                STROKES[strokeIndex], e.getX(), e.getY(),0,1 );
	                    break;
	                case TOOL_ERASER:
	                	flag=0;
	                    currentShape = new Eraser(this, ERASER_STROKES[eraserIndex], 
	                                            e.getX(), e.getY() );
	                    break;
	                case TOOL_POLYGON:
                        point.addPoint( e.getX(), e.getY() );
	                	if(flag==0)
	                	{
	                		 
	                		 currentShape = new Line(this.getForeground(), 
		                                STROKES[strokeIndex], e.getX(), e.getY());
	                		 flag++;
	                		 s1=e.getX();
	                		 s2=e.getY();
	                		 j=1;
	                		 
	                	}
	                	else
	                	{
	                		if(j!=0)
	                		{
	                			float t1 = Math.abs( e.getX() - s1 );
	                			float t2 = Math.abs( e.getY() - s2 );
	                		    if(t1 <= 3 && t2 <= 3)
	                		    {
	                		    	flag=0;
	                		    	j=0;
	                		    	
	                            }
	                		                    		    
	                		   	
	                			int i=shapes.size()-1;
	                		    int x=( (MyShape) shapes.get(i)).getX();
	                		    int y=( (MyShape) shapes.get(i)).getY();
	                		    currentShape = new Line(this.getForeground(), 
	                                STROKES[strokeIndex], x, y, e.getX(), e.getY());
	                		    
	                		   
	                		}
	                		
	                	}
	                	
	                	break;
	                case TOOL_WORD:
	                	flag=0;
	                	currentShape = new Word(this.getForeground(),
	                			 STROKES[strokeIndex], e.getX(), e.getY(), x1, x2, x3, temp );
	                	break;
	                case TOOL_SQUARE1:
	                	flag=0;
	                	currentShape = new PolyLine(this.getForeground(), 
	                			STROKES[2], e.getX(), e.getY(), 0,1 );
	                	break;
	                case TOOL_SQUARE2:
	                	flag=0;
	                	currentShape = new PolyLine(this.getForeground(), 
	                			STROKES[4], e.getX(), e.getY(),0, 1 );
	                	break;
	                	
	                case TOOL_SQUARE3:
	                	flag=0;
	                	currentShape = new PolyLine(this.getForeground(), 
	                			STROKES[5], e.getX(), e.getY(), 0,1 );
	                	break;
	                	
	                case TOOL_CIRCLE1:
	                	flag=0;
	                	currentShape = new PolyLine(this.getForeground(),
	                			STROKES[strokeIndex], e.getX(), e.getY(), 4, 0 );
	                	break;
	                	
	                case TOOL_CIRCLE2:
	                	flag=0;
	                	currentShape = new PolyLine(this.getForeground(),
	                			STROKES[strokeIndex], e.getX(), e.getY(), 10, 0 );
	                	break;
	                	
	                case TOOL_CIRCLE3:
	                	flag=0;
	                	currentShape = new PolyLine(this.getForeground(),
	                			STROKES[strokeIndex], e.getX(), e.getY(), 18, 0 );
	                	break;
	                case TOOL_FILL:
	                	flag=0;
	                	shapeID=getIntersectsShape(e.getX(), e.getY(), 1, 1);
	                	if (shapeID!= -1) 
	        		           fillShape( shapeID, Color.black );
	                	 fillShape( shapeID, this.getForeground() );
	                	 currentShape = (MyShape) shapes.get( shapeID );
	                	
	                    break;
	                case TOOL_ROUNDRECT:
	                	flag = 0;
	                	currentShape = new RoundRect(this.getForeground(),STROKES[strokeIndex],e.getX(),e.getY(),m);
	                	break;
	                	
	                	
	            }
	            shapes.add(currentShape);
	            repaint();
	        } else if (e.getButton() == MouseEvent.BUTTON3 && currentShape != null) {
	            currentShape.processCursorEvent(e, MyShape.RIGHT_PRESSED);
	            repaint();
	        }
	    }
	    
	    public void mouseDragged(MouseEvent e) {
	        if (currentShape != null) {
	            currentShape.processCursorEvent(e, MyShape.CURSOR_DRAGGED);
	            repaint();
	        }
	    }
	    
	    public void mouseReleased(MouseEvent e) {
	        if (e.getButton() == MouseEvent.BUTTON1 && currentShape != null) {
	            currentShape.processCursorEvent(e, MyShape.LEFT_RELEASED);
	            currentShape = null;
	            repaint();
	        }
	    }
	    
	    public int getID()
	    {
	    	return shapeID;
	    }
	    
	    public void mouseClicked(MouseEvent e) {}
	    public void mouseEntered(MouseEvent e) {}
	    public void mouseExited(MouseEvent e) {}
	    public void mouseMoved(MouseEvent e) {}
}