Java by API/java.awt.event/MouseListener — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 20:43, 31 мая 2010
implements MouseListener
<source lang="java">
import java.awt.Container; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Point; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.MouseMotionListener; import javax.swing.JFrame; import javax.swing.JPanel; public class MainClass {
public static void main(String[] args) { JFrame aWindow = new JFrame(); aWindow.setBounds(200, 200, 200, 200); aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container content = aWindow.getContentPane(); content.add(new MouseMotionEvents()); aWindow.setVisible(true); }
} class MouseMotionEvents extends JPanel implements MouseListener,
MouseMotionListener { Point p; public MouseMotionEvents() { addMouseListener(this); addMouseMotionListener(this); } public void mouseClicked(MouseEvent me) { } public void mouseEntered(MouseEvent me) { } public void mouseExited(MouseEvent me) { } public void mousePressed(MouseEvent me) { p = me.getPoint(); repaint(); } public void mouseReleased(MouseEvent me) { p = null; repaint(); } public void mouseDragged(MouseEvent me) { p = me.getPoint(); repaint(); } public void mouseMoved(MouseEvent me) { } public void paint(Graphics g) { if (p != null) { Dimension d = getSize(); int xc = d.width / 2; int yc = d.height / 2; g.drawLine(xc, yc, p.x, p.y); } }
}
</source>