plotpanel.java

这是无线传感器网络用的操作系统tinyos-1.1.0,未来的世界将是它呵

            maxY=maxY+Math.ceil(0.02*(maxY-minY));
        }
    }


    /**
     *    Moves the window to include this point.
     *
     *    @param x x balue of point.
     *    @param y x balue of point.
     */
    public void includePoint(double x, double y) {
/*        if(x<getMinX()){
            setMaxX(getMaxX()-(getMinX()-x)+1);
            setMinX(x-1);
        }
        if(x>getMaxX()){
            setMinX(getMinX()+(x-getMaxX())-1);
            setMaxX(x+1);
        }
        if(y<getMinY()){
            setMaxY(getMaxY()-(getMinY()-y)+1);
            setMinY(y-1);
        }
        if(y>getMaxY()){
            setMinY(getMinY()+(y-getMaxY())-1);
            setMaxY(y+1);
        }*/
        if(x<getMinX()){
            setMaxX(getMaxX()-(getMinX()-x)-1);
            setMinX(x-1);
        }
        if(x>getMaxX()){
            setMinX(getMinX()+(x-getMaxX()+1));
            setMaxX(x+1);
        }
        if(y<getMinY()){
            setMaxY(getMaxY()-(getMinY()-y)-1);
            setMinY(y-1);
        }
        if(y>getMaxY()){
            setMinY(getMinY()+(y-getMaxY())+1);
            setMaxY(y+1);
        }
    }


    /**
     *    Toggles anti-aliasing on/off
     */
    public void setAntiAliasing (boolean antiAliasing) {
        this.antiAliasing = antiAliasing;
    }

    /**
     *    Toggles fit to screen on/off
     */
    public void setFitToScreen (boolean f) {
        this.fitToScreen = f;
    }

	private String double2String (double d) {
		return "" + (Math.round(d*1000.0)/1000.0);
	}
	
	private void updateData() {
		screenWidth = getWidth() - BORDER_LX - BORDER_RX;
		screenHeight = getHeight() - BORDER_TY - BORDER_BY;
		maxWidth = maxX - minX;
		maxHeight = maxY - minY;
	}
	
	private void drawAxis (Graphics2D g, boolean printGrid) {
		int count = 0;
		double step = (maxX - minX) / 10.0;

		for (double x = minX; x <= maxX; x += step, count++) {
			g.drawLine(worldToScreenX(x), screenHeight + BORDER_TY,
			           worldToScreenX(x), screenHeight + BORDER_TY - 3);
			String val = double2String(x);
			String printedVal = val.substring(0, val.length() < 5 ? val.length() : 5);
			int fontWidth = (int)(g.getFontMetrics().getStringBounds (printedVal, g).getWidth());
			if (screenWidth > 400 ||
			    (screenWidth > 140 && screenWidth <= 200 && count % 3 == 2) ||
			    (screenWidth > 200 && count % 2 == 1) ||
			    (screenWidth > 80 && screenWidth <= 140 && count % 4 == 3) )
				g.drawString(printedVal,
				             worldToScreenX(x) - fontWidth / 2,
				             screenHeight + BORDER_TY + fontHeight - 3);
			if (printGrid && worldToScreenX(x) != BORDER_LX + screenWidth - 1) {
				g.setColor(Color.gray);
				g.drawLine(worldToScreenX(x),
				           screenHeight + BORDER_TY - 3,
				           worldToScreenX(x), BORDER_TY);
				g.setColor(Color.black);
			}
		}				
		
		count = 0;
        if(maxY - minY>0)
            step = (maxY - minY) / 10.0;
		for (double y = minY; y <= maxY; y += step, count++) {
			g.drawLine(BORDER_LX, worldToScreenY(y),
			           BORDER_LX + 3, worldToScreenY(y));
			String val = double2String(y);
			String printedVal = val.substring(0, val.length() < 5 ? val.length() : 5);
			
			int fontWidth = (int)(g.getFontMetrics().getStringBounds (printedVal, g).getWidth());
			if (screenHeight > 60 && (screenHeight > 240 || count%2 == 1)) {
				if (y == minY)
					g.drawString(printedVal, BORDER_LX - fontWidth - 2, worldToScreenY(y));
				else
					g.drawString(printedVal, BORDER_LX - fontWidth - 2, worldToScreenY(y) + fontHeight/2 - 3);
			}
			if (printGrid && worldToScreenY(y) != BORDER_TY + 1) {
				g.setColor(Color.gray);
				g.drawLine(BORDER_LX+3, worldToScreenY(y),
				           screenWidth + BORDER_LX,
				           worldToScreenY(y));
				g.setColor(Color.black);
			}

		}				
		g.drawLine(BORDER_LX, screenHeight + BORDER_TY, BORDER_LX + screenWidth, screenHeight + BORDER_TY);
		g.drawLine(BORDER_LX, BORDER_TY, BORDER_LX, screenHeight + BORDER_TY);
		g.drawLine(screenWidth + BORDER_LX, BORDER_TY, screenWidth + BORDER_LX, screenHeight + BORDER_TY);
		g.drawLine(BORDER_LX, BORDER_TY, screenWidth + BORDER_LX, BORDER_TY);
		
		drawOrigin(g);
	}
	
	private int worldToScreenY(double y) {
		return screenHeight + BORDER_TY - (int)((y - minY) * ((double)screenHeight) / maxHeight);
	}

	private int worldToScreenX(double x) {
		return BORDER_LX + (int)((x - minX) * ((double)screenWidth) / maxWidth);
	}

	private double screenToWorldX(int x) {
		return (double)(x - BORDER_LX) / ((double)screenWidth / maxWidth) + minX;
	}

	private double screenToWorldY(int y) {
		return (double)(-y + BORDER_TY + screenHeight) / ((double)screenHeight / maxHeight) + minY;
	}

	
	private void drawOrigin(Graphics2D g) {
		double scaleWidth = (double)(screenWidth) / maxWidth;
		double scaleHeight = ((double)screenHeight)/maxHeight;
		float[] dashPattern = { 3, 8 };
		g.setStroke(new BasicStroke(1, BasicStroke.CAP_BUTT,
                                  BasicStroke.JOIN_MITER, 10,
                                  dashPattern, 0));
		if (maxX > 0.0 && minX < 0.0)
			g.drawLine(BORDER_LX + (int)((0.0 - minX) * scaleWidth),
			           screenHeight + BORDER_TY - 3,
			           BORDER_LX + (int)((0.0 - minX) * scaleWidth), BORDER_TY);
		if (maxY > 0.0 && minY < 0.0)
			g.drawLine(BORDER_LX, worldToScreenY(0),
			           BORDER_LX + screenWidth, worldToScreenY(0));
		g.setStroke(new BasicStroke());
	}
	
	private void plotFunction (Graphics2D g, Function f, Color c) {
		if(c==null)
            g.setColor(Color.blue);
        else
            g.setColor(c);

        int lastX = Integer.MIN_VALUE;
        int lastY = Integer.MIN_VALUE;

        if(f instanceof EmpiricalFunction){
            int x,y;
            EmpiricalFunction ef = (EmpiricalFunction)f;
            Enumeration e = ef.points.elements();
            while(e.hasMoreElements()){
                EmpiricalFunction.PlotPoint p = (EmpiricalFunction.PlotPoint)e.nextElement();
                if(tv==null || p.timeout==-1 || p.timeout>(int)(tv.getTosTime()*1000)){
                    if(p.color!=null)
                        g.setColor(p.color);

                    x = worldToScreenX(p.x);
                    y = worldToScreenY(p.y);
                    if(ef.plotStyle.equalsIgnoreCase("lines") || ef.plotStyle.equalsIgnoreCase("both")){
                        if(lastX!=Integer.MIN_VALUE && lastY!=Integer.MIN_VALUE){
                            if(lastX>=BORDER_LX && lastX<=getWidth()-BORDER_RX && lastY>=BORDER_TY && lastY<=getHeight()-BORDER_BY &&
                                x>=BORDER_LX && x<=getWidth()-BORDER_RX && y>=BORDER_TY && y<=getHeight()-BORDER_BY){
                                   g.drawLine(lastX,lastY,x,y);
                            }
                            //if old points are not within the box, extrapolate
    /*                        else{
                                if(lastX<BORDER_LX){
                                }
                                else if(lastX>screenWidth+BORDER_RX){
                                }
                                else if(lastY>BORDER_BY){
                                }
                                else if(lastY<screenHeight+BORDER_TY){
                                }
                                else if(x<BORDER_LX){
                                }
                                else if(x>screenWidth+BORDER_RX){
                                }
                                else if(y>BORDER_BY){
                                }
                                else if(y<screenHeight+BORDER_TY){
                                }
                            }
                            g.drawLine(lastX,lastY,x,y);*/
                        }
                    }

                    else if(ef.plotStyle.equalsIgnoreCase("dots") || ef.plotStyle.equalsIgnoreCase("both")){
                        x = worldToScreenX(p.x-p.radius);
                        y = worldToScreenY(p.y+p.radius);
                        System.out.println("p.x= " + p.x + "; p.radius = " + p.radius + "; radius = " + Math.abs(worldToScreenX(p.radius*2)-worldToScreenX(0)) + ";  x = " + x);
                        System.out.println("p.y= " + p.y + "; p.radius = " + p.radius + "; radius = " + Math.abs(worldToScreenY(p.radius*2)-worldToScreenY(0)) + ";  y = " + y);
                        if(x>BORDER_LX && x<screenWidth &&y>BORDER_TY && y<screenHeight)
                            g.fillOval(x,y,Math.abs(worldToScreenX(p.radius*2)-worldToScreenX(0)),Math.abs(worldToScreenY(p.radius*2)-worldToScreenY(0)));
                    }
                    if(p.label!=null)
                        g.drawString(p.label,x,y);

                    //doing this here because it crashes if we do it in repaint, which
                    //happens too often
                    if(fitToScreen){
                        if(p.x>maxX) maxX=p.x+Math.ceil(0.02*(maxX-minX));
                        if(p.x<minX) minX=p.x-Math.ceil(0.02*(maxX-minX));
                        if(p.y>maxY) maxY=p.y+Math.ceil(0.02*(maxY-minY));
                        if(p.y<minY) minY=p.y-Math.ceil(0.02*(maxY-minY));
                    }
                    lastX=x;lastY=y;
                }
            }
        }
		else{
            double step = (-minX + maxX) / (screenWidth-2);
            lastX = BORDER_LX+1;
            lastY = screenHeight + BORDER_TY - (int)((f.f(minX) - minY)/maxHeight*((double)screenHeight));

            for (double x = minX; x < maxX; x += step) {
                double y = f.f(x);
                int pixX = BORDER_LX + 1 + (int)((x - minX)/maxWidth*((double)screenWidth));
                int pixY = BORDER_TY + screenHeight - (int)((y - minY)/maxHeight*((double)screenHeight));


                // Keep curve inside the box
                // Make it look better for functions like tan() (ie steep curves)
                if (pixY > BORDER_TY && pixY < screenHeight + BORDER_TY && lastY >= screenHeight + BORDER_TY)
                    lastY = screenHeight + BORDER_TY - 1;
                else if (pixY > BORDER_TY && pixY < screenHeight + BORDER_TY && lastY <= BORDER_TY)
                    lastY = BORDER_TY + 1;
                if (pixY <= BORDER_TY && lastY > BORDER_TY + 1)
                    pixY = BORDER_TY + 1;
                else if (pixY >= screenHeight + BORDER_TY && lastY < screenHeight + BORDER_TY - 1)
                    pixY = screenHeight + BORDER_TY - 1;
                if (lastY <= BORDER_TY)
                    lastY = BORDER_TY + 1;
                else if (lastY >= screenHeight + BORDER_TY)
                    lastY = screenHeight + BORDER_TY - 1;

                if (pixY > BORDER_TY && pixY < screenHeight + BORDER_TY &&
                    lastY > BORDER_TY && lastY < screenHeight + BORDER_TY)
                    g.drawLine(lastX, lastY, pixX, pixY);

                lastX = pixX;
                lastY = pixY;
            }
        }
    }
	
	private void printDescriptions (Graphics2D g) {
		int x = screenWidth + BORDER_LX + 20;
		int y = BORDER_TY + 10;
		int z;

		for (int i = 0; i < functionList.size(); i++) {
			if (((String)descriptionList.get(i)).length() > 0) {
				String descr = (String)descriptionList.get(i);
				g.setColor((Color)colorList.get(i));
				g.fillRect(x, y, 5, 5);
				g.setColor(Color.black);
				if ((int)(g.getFontMetrics().getStringBounds (descr, g).getWidth()) > BORDER_RX - 25) {
					int len2 = 0;
					for (z = 0; z < descr.length(); y += fontHeight) {
						int len = Math.min(descr.length()-z, 2);
						while ((int)(g.getFontMetrics().getStringBounds (descr.substring(z, z+len), g).getWidth())
						       < BORDER_RX - 25 && len2 != len) {
							len2 = len;
							if (descr.charAt (z+len-1) == ' ')
								len++;
							
							while (len+z < descr.length() && descr.charAt (z+len-1) != ' ')
								len++;
						}
						g.drawString(descr.substring(z, z+len2), x + 9, y + 5);
						z += len2;
					}
				} else {
					g.drawString(descr, x + 9, y + 5);
					y += fontHeight;
				}
			}
		}
	}
	
	public void paint(Graphics g) {
		//Image screen = new Image(getWidth(), getHeight());
		Graphics2D g2d = (Graphics2D)g;
		g2d.setFont(new Font("SansSerif", Font.PLAIN, 10));
		fontHeight = (int)(g.getFontMetrics().getStringBounds ("0132465789", g).getHeight());
		cursorPosition.setBackground(getBackground());
		super.paintComponent (g);
		
		if (antiAliasing)
			g2d.addRenderingHints(AALIAS);
		updateData();
		g.setColor(Color.black);
		drawAxis(g2d, true);

		for (int i = 0; i < functionList.size(); i++)
			plotFunction (g2d, (Function)functionList.get(i), (Color)colorList.get(i));
/*        if (fitToScreen)
            this.FitToScreen();*/
		printDescriptions(g2d);
	}

}