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import java.awt.*;
import java.util.Vector;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* Dessin.java
*
* Created on 5 janv. 2009, 11:04:53
*/
/**
*
* @author x
*/
public class Dessin extends javax.swing.JPanel {
Vector figuresList;
int figure;
Point start;
/** Creates new form Dessin */
public Dessin() {
initComponents();
figuresList = new Vector();
start = new Point();
}
public void paintComponent(Graphics g){
super.paintComponent(g);
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">
private void initComponents() {
setBackground(new java.awt.Color(255, 255, 255));
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>
private void formMouseDragged(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
//dessin à main levée
if (figure == 1){
Trace t = (Trace)figuresList.lastElement();
t.add(evt.getX(), evt.getY());
t.draw(this.getGraphics());
}
//Rectangle à dessiner
else if (figure == 2){
repaint();
draw(this.getGraphics());
Rect r = new Rect(Color.BLACK,start.x, start.y,
evt.getX(), evt.getY());
r.draw(this.getGraphics());
this.getGraphics().dispose();
}
}
private void formMousePressed(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
if (figure == 1){
figuresList.add(new Trace(Color.BLACK));
}
else if(figure == 2){
start.x = evt.getX();
start.y = evt.getY();
}
}
private void formMouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
if(figure == 2){
figuresList.add(new Rect(Color.BLACK,
start.x, start.y, evt.getX(), evt.getY() ));
repaint();
}
}
public void draw(Graphics g){
Figure f;
for(int i = 0 ; i < figuresList.size() ; i++) {
f = (Figure)figuresList.elementAt(i);
f.draw(g);
}
}
// Variables declaration - do not modify
// End of variables declaration
}
abstract class Figure {
abstract void draw(Graphics g);
}
/**
*
* @author x
*/
class Trace extends Figure {
Color c;
Vector pointsArray;
Trace(Color c) {
this.c = c;
pointsArray = new Vector();
}
void add(int x, int y) {
pointsArray.addElement(new Point(x , y));
}
Point elementAt(int n) {
if (pointsArray.capacity() < n) return null;
return (Point) pointsArray.elementAt(n);
}
int nbPoints() {
return pointsArray.size();
}
void draw(Graphics g) {
int n = nbPoints();
if(n <= 1) return;
g.setColor(c);
int x_last = elementAt(0).x;
int y_last = elementAt(0).y;
int x,y;
for(int i = 1 ; i < n ; i++) {
x = elementAt(i).x;
y = elementAt(i).y;
g.drawLine(x_last, y_last, x, y);
x_last = x;
y_last = y;
}
}
}
class Rect extends Figure{
Color c;
Point p1, p2;
Rect(Color c, int x1, int y1, int x2, int y2) {
this.c = c;
p1 = new Point(x1, y1);
p2 = new Point(x2, y2);
}
void draw(Graphics g) {
int x, y, width, height;
g.setColor(c);
x = Math.min(p1.x, p2.x);
y = Math.min(p1.y, p2.y);
width = Math.abs(p1.x - p2.x);
height = Math.abs(p1.y - p2.y);
g.drawRect(x, y, width, height);
}
} |
Dessin de forme géométrique, problèmes d'incompréhension avec repaint() etc
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