drawingboard.java

windows画图板.类似于windows自带的画图程序!

import java.awt.*;
import java.awt.event.*;
import java.awt.print.PageFormat;
import java.awt.print.Printable;

import javax.swing.*;
import java.util.ArrayList;

public class DrawingBoard extends JLabel implements MouseListener,
		MouseMotionListener, Printable {

	public static final int TOOL_LINE = 0;
	public static final int TOOL_RECT = 1;
	public static final int TOOL_OVAL = 2;
	public static final int TOOL_DIAMOND = 3;
	public static final int TOOL_PENCIL = 4;
	public static final int TOOL_ERASER = 5;
	public static final int TOOL_POLYGON = 6;
	public static final int TOOL_CLIPRECT = 7;
	public static final int TOOL_TEXT = 8;
	public static final int TOOL_ROUNDRECT = 9;
	public static final int TOOL_BRUSH = 10;
	public static final int TOOL_PENQIANG = 11;
	public static final int TOOL_QUSHE = 12;
	public static final int TOOL_CURVE = 13;
	public static final int TOOL_FANGDAJING = 14;
	public static final Stroke[] STROKES = new Stroke[] {
			new BasicStroke(1.0f), new BasicStroke(2.0f),
			new BasicStroke(5.0f), new BasicStroke(7.5f),
			new BasicStroke(10.0f) };
	public static final Stroke[] ERASER_STROKES = new Stroke[] {
			new BasicStroke(15.0f), new BasicStroke(20.0f),
			new BasicStroke(30.0f), new BasicStroke(50.0f),
			new BasicStroke(100.0f) };
	private ArrayList shapes;

	private IShape currentShape;

	private static int tool;

	protected static int strokeIndex, eraserIndex;

	@SuppressWarnings("unchecked")
	public DrawingBoard() {
		shapes = new ArrayList();
		tool = TOOL_LINE;
		currentShape = null;
		strokeIndex = 0;
		eraserIndex = 0;

		setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
		setOpaque(true);
		setForeground(Color.black);
		setBackground(Color.white);

		addMouseListener(this);
		addMouseMotionListener(this);
	}

	public void setTool(int t) {
		if (t < TOOL_LINE || t > TOOL_FANGDAJING)
			throw new IllegalArgumentException("Invaild Tool Specified!");
		tool = t;
	}
	public void clearBoard() {
		shapes.clear();
		repaint();
	}

	public String getShapes() {
		int size = shapes.size();
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < size; i++) {
			IShape shape = (IShape) shapes.get(i);
			buffer.append("\n");
			buffer.append(shape.getClass().getName());
			buffer.append("\t");
			buffer.append(shape.getShapeData());
		}
		return buffer.toString();
	}
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		int size = shapes.size();
		Graphics2D g2d = (Graphics2D) g;
		repaint();
		if(picture!=null){
		setIcon(new ImageIcon(picture));
		}
		for (int i = 0; i < size; i++) {
	    ((IShape) shapes.get(i)).draw(g2d);
		}
}
	public int print(Graphics g, PageFormat pf, int page) {
		return Printable.PAGE_EXISTS;
	}
	public void mousePressed(MouseEvent e) {
		if (e.getButton() == MouseEvent.BUTTON1) {
			mouseX = e.getXOnScreen();
			mouseY = e.getYOnScreen();
			switch (tool) {
			case TOOL_LINE:
				Panel.judgmentDraw = true;
				currentShape = new Line(Panel.shapeColor, STROKES[strokeIndex],
						e.getX(), e.getY());
				break;
			case TOOL_RECT:
				Panel.judgmentDraw = true;
				currentShape = new Rect(Panel.shapeColor, STROKES[strokeIndex],
						e.getX(), e.getY());
				break;
			case TOOL_OVAL:
				Panel.judgmentDraw = true;
				currentShape = new Oval(Panel.shapeColor, STROKES[strokeIndex],
						e.getX(), e.getY());
				break;
			case TOOL_DIAMOND:
				Panel.judgmentDraw = true;
				currentShape = new Diamond(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_PENCIL:
				Panel.judgmentDraw = true;
				currentShape = new PolyLine(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_ERASER:
				currentShape = new Eraser(this, ERASER_STROKES[eraserIndex], e
						.getX(), e.getY());
				break;
			case TOOL_POLYGON:
				Panel.judgmentDraw = true;
				currentShape = new PolyGon(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_CLIPRECT:
				currentShape = new ClipRect(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_TEXT:
				currentShape = new Text(Panel.shapeColor,
						MenuEventClass.drawBoarFont, e.getX(), e.getY());
				break;
			case TOOL_ROUNDRECT:
				Panel.judgmentDraw = true;
				currentShape = new RoundRect(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_BRUSH:
				Panel.judgmentDraw = true;
				currentShape = new Brush(Panel.shapeColor,
						StrokeComponent.stroke, e.getX(), e.getY());
				break;
			case TOOL_PENQIANG:
				Panel.judgmentDraw = true;
				currentShape = new PenQiang(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_QUSHE:
				Panel.judgmentDraw = true;
				currentShape = new QuShe(Panel.shapeColor,
						MenuEventClass.drawBoarFont, e.getX(), e.getY());
				break;
			case TOOL_CURVE:
				Panel.judgmentDraw = true;
				currentShape = new Curce(Panel.shapeColor,
						STROKES[strokeIndex], e.getX(), e.getY());
				break;
			case TOOL_FANGDAJING:
				MenuEventClass.isFDOrSX=true;
				if (MenuEventClass.isFDOrSX) {
					GraphicsEnvironment environment = GraphicsEnvironment
							.getLocalGraphicsEnvironment();
					GraphicsDevice screen = environment
							.getDefaultScreenDevice();
					try {
						Robot robot = new Robot(screen);
						FrameDesign.run(robot);
					} catch (AWTException k) {
						k.printStackTrace();
					}
				}
				Panel.drawCanvas.clearBoard();
				picture = FrameDesign.image;
				MenuEventClass.scale(picture, 2, MenuEventClass.isFDOrSX);
				break;
			}
			shapes.add(currentShape);
			repaint();
		} else if (e.getButton() == MouseEvent.BUTTON3 && currentShape != null) {
			currentShape.processCursorEvent(e, IShape.RIGHT_PRESSED);
			repaint();
		}
	}
	public void mouseDragged(MouseEvent e) {
		if (currentShape != null) {
			currentShape.processCursorEvent(e, IShape.CURSOR_DRAGGED);
			ctrlx = e.getX();
			ctrly = e.getY();
			repaint();
		}
	}
	public void mouseReleased(MouseEvent e) {
		if (e.getButton() == MouseEvent.BUTTON1 && currentShape != null) {
			currentShape.processCursorEvent(e, IShape.LEFT_RELEASED);
			currentShape = null;
			repaint();
		}
	}
	public void mouseClicked(MouseEvent e) {
	}
	public void mouseEntered(MouseEvent e) {
	}
	public void mouseExited(MouseEvent e) {
	}
	public void mouseMoved(MouseEvent e) {
	}
	protected static Image picture = null;
	protected static int mouseX;
	protected static int mouseY;
	protected static boolean quShe = false;
	protected static int ctrlx;
	protected static int ctrly;
}