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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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Envoyé par filipaillou
La zone sur laquelle tu dessines sera réinitialisé à partir du buffer puis il dessinera par dessus la figure en cours de dessin. Tant que ta figure n'est pas validé (si tu agrandit le rectangle par exemple) il redessinera la zone correspondante puis la figure temporaire par dessus.
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