[java] pb repaint() et update()

Marsh Posté le 06-12-2005 à 13:15:41

Salut a tous!!

Je fais appel à votre aide rapidement, je suis tout nouveau dans la prog java.
Je suis sur un programme qui doit me dessiner des triangles lorsque je clique sur la souris a tel endroit de l ecran.
Le triangle se dessine comme il faut la ou je clique pas de pb, mais seulement lorsque je clique sur un autre endroit le nouveau triangle se dessine
mais l ancien disparait.
J'ai regardé un peu partout sur google et j ai trouvé que ça se passait au niveau de la methode repaint() qui appelle la methode update qui efface l ecran a chaque fois.
Il faut donc que je redefinisse cette methode update() mais je ne sais pas comment.

j ai essayé de la mettre a plusieur endroit dans le programme mais ça marche toujours pas...ça me fait peter un cable...pour un truc aussi con...!!
Voici mon programme.
Ne faites pas attention a la classe pieces...

Code :

package triomino;
import javax.swing.*;
import java.awt.*;
import javax.swing.event.MouseInputListener;
import java.awt.event.MouseEvent;
/**
* <p>Titre : TRIOMINO++</p>
*/
public class UI extends JFrame {
JPanel contentPane;
JLabel label;
static int GridSpace = 150;
Piece Triangle = new Piece();
private Point clickPoint, cursorPoint;
public void creerUI() {
CoordinateArea coordinateArea = new CoordinateArea(this, Triangle);
contentPane.add(coordinateArea);
label = new JLabel();
resetLabel();
contentPane.add(label);
//Align the left edges of the components.
coordinateArea.setAlignmentX(Component.LEFT_ALIGNMENT);
label.setAlignmentX(Component.LEFT_ALIGNMENT); //redundant
}
public UI() {
try {
setDefaultCloseOperation(EXIT_ON_CLOSE);
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}
public void updateCursorLocation(int x, int y) {
if (x < 0 || y < 0) {
cursorPoint = null;
updateLabel();
return;
}
if (cursorPoint == null) {
cursorPoint = new Point();
}
cursorPoint.x = x;
cursorPoint.y = y;
updateLabel();
}
public void updateClickPoint(Point p) {
clickPoint = p;
updateLabel();
}
public void resetLabel() {
cursorPoint = null;
updateLabel();
}
protected void updateLabel() {
String text = "";
if ((clickPoint == null) && (cursorPoint == null)) {
text = "cliquer ou bouger le curseur dans la zone ";
} else {
if (clickPoint != null) {
text += "Le Dernier clique etait au ("
+ clickPoint.x + ", " + clickPoint.y + " ). ";
}
if (cursorPoint != null) {
text += "Le curseur est au ("
+ cursorPoint.x + ", " + cursorPoint.y + " ). ";
}
}
label.setText(text);
}
public static class CoordinateArea extends JComponent implements
MouseInputListener {
Point point = null;
UI controller;
Dimension preferredSize = new Dimension(400, 500);
Color gridColor;
Piece Triangle;
public CoordinateArea(UI controller, Piece Triangle) {
this.controller = controller;
this.Triangle = Triangle;
//Add a border of 5 pixels at the left and bottom,
//and 1 pixel at the top and right.
setBorder(BorderFactory.createMatteBorder(1, 5, 5, 1,
Color.BLUE));
addMouseListener(this);
addMouseMotionListener(this);
setBackground(Color.DARK_GRAY);
setOpaque(true);
}
public void update(Graphics g) {
paint(g);
}
public Dimension getPreferredSize() {
return preferredSize;
}
protected void paintComponent(Graphics g) {
//Paint background if we're opaque.
if (isOpaque()) {
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
}
//Paint 20x20 grid.
g.setColor(Color.GRAY);
drawGrid(g, GridSpace);
//If user has chosen a point, paint a small dot on top.
if (point != null) {
g.setColor(getForeground());
g.fillRect(point.x - 3, point.y - 3, 7, 7);
DessinerTriangle(g);
}
}
//Draws a 20x20 grid using the current color.
private void drawGrid(Graphics g, int gridSpace) {
Insets insets = getInsets();
int firstX = insets.left;
int firstY = insets.top;
int lastX = getWidth() - insets.right;
int lastY = getHeight() - insets.bottom;
//Draw vertical lines.
int x = firstX;
while (x < lastX) {
g.drawLine(x, firstY, x, lastY);
x += gridSpace;
}
//Draw horizontal lines.
int y = firstY;
while (y < lastY) {
g.drawLine(firstX, y, lastX, y);
y += gridSpace;
}
}
//Methods required by the MouseInputListener interface.
public void mouseClicked(MouseEvent e) {
int x = e.getX();
int y = e.getY();
if (point == null) {
point = new Point(x, y);
} else {
point.x = x;
point.y = y;
}
controller.updateClickPoint(point);
repaint();
}
public void DessinerTriangle(Graphics g) {
int[] X = new int[3];
int[] Y = new int[3];
X[0] = (point.x / GridSpace) % GridSpace * GridSpace;
X[1] = (point.x / GridSpace) % GridSpace * GridSpace;
X[2] = (point.x / GridSpace) % GridSpace * GridSpace + GridSpace;
Y[0] = (point.y / GridSpace) % GridSpace * GridSpace;
Y[1] = (point.y / GridSpace) % GridSpace * GridSpace + GridSpace;
Y[2] = (point.y / GridSpace) % GridSpace * GridSpace + GridSpace;
//Triangle.pivoterAGauche();
//Triangle.setX(X);
//Triangle.setY(Y);
g.setColor(Color.red);
g.drawPolygon(X, Y, 3);
g.fillPolygon(X, Y, 3);
}
public void mouseMoved(MouseEvent e) {
controller.updateCursorLocation(e.getX(), e.getY());
}
public void mouseExited(MouseEvent e) {
controller.resetLabel();
}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mousePressed(MouseEvent e) {}
public void mouseDragged(MouseEvent e) {}
}
/**
* Initialisation du composant.
*
* @throws java.lang.Exception
*/
private void jbInit() throws Exception {
contentPane = (JPanel) getContentPane();
contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.PAGE_AXIS));
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setSize(new Dimension(600, 500));
setTitle("TRIOMINO++" );
}
private class Piece {
/**
* Définition des coordonnées du triangle en fonction de
* la position courante de la souris.
*/
private int[] X = new int[3];
private int[] Y = new int[3];
private int[] Chiffre = new int[3];
Piece(int[] x, int[] y) {
X = x;
Y = y;
}
Piece() {
}
public void setChiffre(int[] chiffre) {
Chiffre = chiffre;
}
public void setX(int[] x) {
X = x;
}
public void setY(int[] y) {
Y = y;
}
public int[] getChiffre(int[] chiffre) {
return Chiffre;
}
public void pivoterADroite() {
int aux = X[0];
X[0] = X[1];
X[1] = X[2];
X[2] = aux;
aux = Y[0];
Y[0] = Y[1];
Y[1] = Y[2];
Y[2] = aux;
aux = Chiffre[0];
Chiffre[0] = Chiffre[1];
Chiffre[1] = Chiffre[2];
Chiffre[2] = aux;
}
public void pivoterAGauche() {
int aux = X[0];
X[0] = X[2];
X[2] = X[1];
X[1] = aux;
aux = Y[0];
Y[0] = Y[2];
Y[2] = Y[1];
Y[1] = aux;
aux = Chiffre[0];
Chiffre[0] = Chiffre[2];
Chiffre[2] = Chiffre[1];
Chiffre[1] = aux;
}
}
}

Message édité par sebounet le 08-12-2005 à 13:46:12

Marsh Posté le 06-12-2005 à 13:15:41

Marsh Posté le 07-12-2005 à 16:51:11

reponse courte:

Code :

public void update(Graphics _g) { paint(_g); }

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