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| package labs;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
class Clock {
private int hours;
private int minutes;
public Clock(int hours, int minutes) {
this.setHours(hours);
this.setMinutes(minutes);
}
public void setMinutes(int minutes) {
this.minutes = minutes % 60;
}
public int getMinutes() {
return minutes;
}
public void setHours(int hours) {
this.hours = hours % 24;
}
public int getHours() {
return hours;
}
}
public class ClockPanel extends JPanel {
private Clock clock;
public ClockPanel(Clock сlock) {
setDoubleBuffered(true);
setPreferredSize(new Dimension(600, 400));
setClock(сlock);
}
@Override
public void paint(Graphics g) {
super.paint(g);
if (clock != null) {
drawClock(g, clock);
}
}
/**
* Метод рисует на канве круг с заданным центром, радиусом и цветом
* @param g канва
* @param color цвет круга
* @param center центр круга
* @param radius радиус круга
*/
private void drawCircle(Graphics g, Point center, int radius) {
g.setColor(Color.RED);
g.fillOval(center.x - radius / 2, center.y - radius / 2, radius, radius);
}
public Point convertCoordinatesToPanel(Point point) {
Point O = new Point(getSize().width / 2, getSize().height / 2);
return new Point(O.x + point.x, O.y - point.y);
}
private Point getEndPoint(double angle, int radius) {
Point O = new Point(getSize().width / 2, getSize().height / 2);
int x = (int) (O.x + radius * Math.cos(angle));
int y = (int) (O.y - radius * Math.sin(angle));
return new Point(x, y);
}
private void drawClock(Graphics g, Clock сlock) {
Point O = new Point(getSize().width / 2, getSize().height / 2);
int radiusClock = Math.min(O.x, O.y) - 20;
int radiusMinute = radiusClock - 10;
int radiusHour = radiusMinute - 20;
double angle;
for (int i = 1; i < 13; i++) {
angle = Math.PI / 2 - i * Math.PI / 6;
Point point = getEndPoint(angle, radiusClock);
drawCircle(g, point, 8);
}
angle = Math.PI / 2 - (clock.getHours() + clock.getMinutes() / 60.0) * Math.PI / 6;
Point point = getEndPoint(angle, radiusHour);
g.setColor(Color.GREEN);
g.drawLine(O.x, O.y, point.x, point.y);
angle = Math.PI / 2 - clock.getMinutes() * Math.PI / 30;
point = getEndPoint(angle, radiusMinute);
g.setColor(Color.GRAY);
g.drawLine(O.x, O.y, point.x, point.y);
}
public Clock getClock() {
return clock;
}
public void setClock(Clock clock) {
this.clock = clock;
}
public static void main(String[] args) throws Exception {
JFrame f = new JFrame("Часики");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new BorderLayout());
final ClockPanel clockPanel = new ClockPanel(new Clock(0, 0));
clockPanel.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 2));
f.add(clockPanel, BorderLayout.CENTER);
JPanel controlPanel = new JPanel();
controlPanel.setBorder(BorderFactory.createTitledBorder("Настройки"));
controlPanel.setLayout(new GridLayout(2, 2, 6, 6));
JButton but = (JButton) controlPanel.add(new JButton("Часы +1"));
but.putClientProperty("plus", true);
ActionListener alHours = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JButton b = (JButton) e.getSource();
boolean plus = ((Boolean) b.getClientProperty("plus")).booleanValue();
clockPanel.getClock().setHours(clockPanel.getClock().getHours() + (plus ? 1 : -1));
clockPanel.repaint();
}
};
but.addActionListener(alHours);
but = (JButton) controlPanel.add(new JButton("Часы -1"));
but.putClientProperty("plus", false);
but.addActionListener(alHours);
but = (JButton) controlPanel.add(new JButton("Минуты +1"));
but.putClientProperty("plus", true);
ActionListener alMinutes = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JButton b = (JButton) e.getSource();
boolean plus = ((Boolean) b.getClientProperty("plus")).booleanValue();
clockPanel.getClock().setMinutes(clockPanel.getClock().getMinutes() + (plus ? 1 : -1));
clockPanel.repaint();
}
};
but.addActionListener(alMinutes);
but = (JButton) controlPanel.add(new JButton("Минуты -1"));
but.putClientProperty("plus", false);
but.addActionListener(alMinutes);
f.add(controlPanel, BorderLayout.SOUTH);
f.pack();
f.setVisible(true);
}
} |
(
Сообщение было отмечено Lyubov63 как решение
