draw2d 在Figure上绘图

野性酷女 2023-09-29 09:21 27阅读 0赞

#### draw2d 在Figure上绘图 ####

*  圆形
 *  方形
 *  背景色颜色
 *  边框颜色
 *  根据坐标画线

## 圆形 ##

//设置圆形
    		Ellipse ellipse =new Ellipse();
    		//20 ,20 代表x和y ；50,50代表宽高
    		ellipse.setBounds(new Rectangle(20,20,50,50));
    		//设置不显示 
    		ellipse.setVisible(false);
    		add(ellipse);

## 方形 ##

//设置方形
    		RectangleFigure rectangleFigure = new RectangleFigure();
    		rectangleFigure.setBounds(new Rectangle(20,20,50,50));
    		add(rectangleFigure);

## 背景色颜色 ##

List<?> figureChildren = f.getChildren();
    for (Object object : figureChildren ) {
        
    	if (object instanceof Ellipse || object instanceof RectangleFigure) {
        
    			((IFigure)object).setBackgroundColor(new Color(null, 颜色的RGB对象);
    					}
    				}

## 边框颜色 ##

for (Object object : figureChildren ) {
        
    					if (object instanceof Ellipse || 
    					object instanceof RectangleFigure) {
        
    					//设置前景色
    						((IFigure)object).setForegroundColor(
    						new Color(null, 
    						Converter.Int2RGB(Long.parseLong(evt.getNewValue()+""))));
    						
    						((IFigure)object).setBorder(
    						new 
    LineBorder(Converter.Int2Color(Long.parseLong(evt.getNewValue()+"")), 5) );
    					}
    				}

## 根据坐标画线 ##

//重写paintFigure方法
    	@Override
    	public void paintFigure(Graphics graphics) {
        
    	super.paintFigure(graphics);
    		drawWave(graphics);
    }
    //设置坐标
    protected void drawWave(Graphics graphics){
        
    		//线颜色
    		setForegroundColor(ColorConstants.red);
    		//线宽度
    		graphics.setLineWidth(mPenWidth);
    		Rectangle bounds = getBounds().getCopy();
    		if (bounds.width == 0) {
        
    			return;
    		}
    		int index = getParent().getChildren().indexOf(this);
    		
    		graphics.setAntialias(SWT.ON);
    		
    		PointList points = new PointList();
    		double w = 2 * Math.PI / bounds.width;
    		double offset = (index * 10 ) * Math.PI / 180.0;
    		//折线，只需要折角位置和第一个点和最后一个点位置
    		if (mStyle == Diagram.STYLE_LINE_BROKEN) {
        
    			double[] p = new double[]{
        0,  ((Math.PI/2 + offset) / w) , ((Math.PI/2*3 + offset) / w), bounds.width};
    			//第一个点
    			int first = (int) ((Math.sin(w * p[0] - offset)*bounds.height/2) + bounds.height/2);
    			points.addPoint((int) (bounds.x + p[0]), bounds.y + first);
    			points.addPoint((int) (bounds.x + p[1]), bounds.y + bounds.height);
    			points.addPoint((int) (bounds.x + p[2]), bounds.y + 0);
    			int last = (int) ((Math.sin(w * p[3] - offset)*bounds.height/2) + bounds.height/2);
    			points.addPoint((int) (bounds.x + p[3]), bounds.y + last);
    		} else {
        
    		//曲线，需要设置每个点的位置
    			for(int i = 0; i <= bounds.width; i += 1){
        
    				int funy = (int) (Math.sin(w * i - offset)*bounds.height/2);
    			    int y = funy + bounds.y + bounds.height/2;
    			    int x = bounds.x + i;
    			   points.addPoint(x, y);
    		    }
    		}
    		graphics.drawPolyline(points);
    		
    	}