drawpen.java

用java写的简单的画图程序

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * DrawPen.java
 *
 * Created on 2009-5-5, 8:34:06
 */

package pen;

import java.awt.Graphics;
import java.awt.Point;
import java.util.ArrayList;

/**
 *
 * @author Administrator
 */
public class DrawPen extends javax.swing.JPanel {
    private ArrayList<Path> paths = new ArrayList<Path>();
    private Path path;
    private Main m;
    /** Creates new form DrawPen */
    public DrawPen(Main m) {
        initComponents();
        this.m = m;
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        for (Path path : paths) {
            path.draw(g);
        }
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        addMouseListener(new java.awt.event.MouseAdapter() {
            public void mousePressed(java.awt.event.MouseEvent evt) {
                formMousePressed(evt);
            }
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                formMouseReleased(evt);
            }
        });
        addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
            public void mouseDragged(java.awt.event.MouseEvent evt) {
                formMouseDragged(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents

    private void formMousePressed(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_formMousePressed
        path = new Path(new ArrayList<Point>(), m.getC(), m.getT());
        path.addPoint(evt.getPoint());
    }//GEN-LAST:event_formMousePressed

    private void formMouseReleased(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_formMouseReleased
        paths.add(path);
    }//GEN-LAST:event_formMouseReleased

    private void formMouseDragged(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_formMouseDragged

        System.out.println(evt.getButton());
        if (evt.getModifiers()==evt.BUTTON1_MASK){
             path.addPoint(evt.getPoint());
             path.draw(this.getGraphics());
             System.out.println("kkk");
        }
        if(evt.getButton()==1){

        }
       
    }//GEN-LAST:event_formMouseDragged


    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables

}