Programas Gráficos - Programa Base 2D

Programas Gráficos - Programa Base 2D - Prof. Lucio Mauro Braga Machado
Março - 2015
1 Criar a classe Ponto
public class Ponto {
private double x;
private double y;
private boolean pu;
public Ponto(double x,double y, boolean pu){
this.x=x;
this.y=y;
this.pu=pu;
}
public Ponto(){
}
}
2 Encapsular os campos da classe
3 Criar a classe Desenho
import java.awt.Dimension;
import java.awt.Graphics;
import java.util.Vector;
public class Desenho {
private double xwmax, xwmin, ywmax, ywmin, xvmax, xvmin, yvmax, yvmin;
private double xmax, ymax, xcoord, ycoord, xd, yd, mx, my;
Vector desenho = new Vector();
public void setMundo(double x1, double y1, double x2, double y2) {
xwmax = x2;
ywmax = y2;
xwmin = x1;
ywmin = y1;
}
public void setDimension(Dimension d){
xmax=d.width;
ymax=d.height;
}
public double getMouseX(){
return mx;
}
public double getMouseY(){
return my;
}
public void setMouse(int x,int y){
mx =(((x-xvmin) / ((xvmax - xvmin) / (xwmax - xwmin))) + xwmin) / xmax;
my =(((y-yvmin) / ((yvmax - yvmin) / (ywmax - ywmin))) + ywmin) / ymax;
}
public void setViewPort(double x1, double y1, double x2, double y2) {
xvmax = x2;
yvmax = y2;
xvmin = x1;
yvmin = y1;
}
private void mapCoord(double x, double y) {
double xv =(((x-xwmin) * ((xvmax - xvmin) / (xwmax - xwmin))) + xvmin);
double yv =(((y-ywmin) * ((yvmax - yvmin) / (ywmax - ywmin))) + yvmin);
xd = xv * xmax;
yd = yv * ymax;
}
private void linhaAte(Graphics g, double x, double y) {
double xi, yi;
mapCoord(xcoord, ycoord);
xi = xd;
yi = yd;
mapCoord(x, y);
g.drawLine((int) xi, (int) yi, (int) xd, (int) yd);
xcoord = x;
ycoord = y;
}
private void movaPara(Graphics g, double x, double y, boolean pu) {
if (pu) {
xcoord = x;
ycoord = y;
} else {
linhaAte(g, x, y);
}
}
public void desenha(Graphics g) {
Ponto p;
for (int i = 0; i < desenho.size(); i++) {
p = (Ponto) desenho.get(i);
movaPara(g, p.getX(), p.getY(), p.isPu());
}
}
public void triangulo() {
desenho.addElement(new Ponto(10d, 9d, true));
desenho.addElement(new Ponto(9d, 11d, false));
desenho.addElement(new Ponto(11d, 11d, false));
desenho.addElement(new Ponto(10d, 9d, false));
}
public void quadrado(){
desenho.addElement(new Ponto(11, 9, true));
desenho.addElement(new Ponto(9, 9, false));
desenho.addElement(new Ponto(9, 11, false));
desenho.addElement(new Ponto(11, 11, false));
desenho.addElement(new Ponto(11, 9, false));
}
public void translada(double dx, double dy) {
Ponto p;
for (int i = 0; i < desenho.size(); i++) {
p = (Ponto) desenho.get(i);
p.setX(p.getX() + dx);
p.setY(p.getY() + dy);
desenho.set(i, p);
}
}
public void rotaciona(double ang) {
Ponto p;
for (int i = 0; i < desenho.size(); i++) {
p = (Ponto) desenho.get(i);
double xx = p.getX();
double yy = p.getY();
p.setX(xx * Math.cos(ang) + yy * (-Math.sin(ang)));
p.setY(xx * Math.sin(ang) + yy * Math.cos(ang));
desenho.set(i, p);
}
}
public void deforma(boolean maior) {
Ponto p;
for (int i = 0; i < desenho.size(); i++) {
if (maior) {
p = (Ponto) desenho.get(i);
p.setX(((p.getX() - mx) * 0.1) + p.getX());
p.setY(((p.getY() - my) * 0.1) + p.getY());
desenho.set(i, p);
} else {
p = (Ponto) desenho.get(i);
p.setX(p.getX() - ((p.getX() - mx) * 0.1));
p.setY(p.getY() - ((p.getY() - my) * 0.1));
desenho.set(i, p);
}
}
}
}
4 Criar a classe Painel que herda JPanel e implementa ActionListener
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.GroupLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Painel extends JPanel implements ActionListener {
JButton bSair;
JFrame tela;
Desenho desenho = new Desenho();
double mx, my;
public Painel(int largura, final int altura, JFrame t) {
tela = t;
setFocusable(true);
setDoubleBuffered(true);
setSize(largura, altura);
inicializa();
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
int tecla = e.getKeyCode();
Color cor = tela.getForeground();
tela.setForeground(tela.getBackground());
desenho.desenha(tela.getGraphics());
System.out.println(tecla);
switch (tecla) {
case KeyEvent.VK_LEFT:
desenho.translada(-1, 0);
break;
case KeyEvent.VK_UP:
desenho.translada(0, -1);
break;
case KeyEvent.VK_RIGHT:
desenho.translada(1, 0);
break;
case KeyEvent.VK_DOWN:
desenho.translada(0, 1);
break;
case KeyEvent.VK_W:
mx = desenho.getMouseX();
my = desenho.getMouseY();
desenho.translada(-mx, -my);
desenho.rotaciona(0.1);
desenho.translada(mx, my);
break;
case KeyEvent.VK_Q:
mx = desenho.getMouseX();
my = desenho.getMouseY();
desenho.translada(-mx, -my);
desenho.rotaciona(-0.1);
desenho.translada(mx, my);
break;
case KeyEvent.VK_A:
desenho.deforma(true);
break;
case KeyEvent.VK_S:
desenho.deforma(false);
break;
}
tela.setForeground(cor);
desenho.desenha(tela.getGraphics());
}
});
this.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
int x = e.getX();
int y = e.getY();
desenho.setMouse(x, y);
}
});
}
@Override
public void actionPerformed(ActionEvent e) {
repaint();
}
private void inicializa() {
setBackground(Color.black);
setForeground(Color.white);
bSair = new JButton();
bSair.setText("Sair");
GroupLayout layout = new GroupLayout(tela.getContentPane());
tela.getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING,
layout.createSequentialGroup()
.addGap(0, 327, Short.MAX_VALUE)
.addComponent(bSair)));
layout.setVerticalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(bSair)
.addGap(0, 277, Short.MAX_VALUE)));
bSair.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
tela.dispose();
}
});
desenho.setMundo(0, 0, 20, 20);
desenho.setViewPort(0, 0, 1, 1);
desenho.triangulo();
}
@Override
public void paint(Graphics g) {
Dimension dim = this.getSize();
desenho.setDimension(dim);
desenho.desenha(g);
}
}
5 Crie a classe Tela que herda JFrame
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;
public class Tela extends JFrame{
public Tela() {
setBackground(Color.black);
setForeground(Color.white);
setUndecorated(true);
Toolkit toolkit = java.awt.Toolkit.getDefaultToolkit();
Dimension scrSize = toolkit.getScreenSize();
setSize(scrSize.width, scrSize.height);
add(new Painel(scrSize.width, scrSize.height, this));
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
new Tela();
}
}