Napisałem MouseMotionListener
dla JPanel
ale ja się w tym gubię w tym, jak go używać.
Klasa detektora dobrze działa po dodaniu do ramki za pomocą aWindow.add(new MouseMotionEvents())
ale gdy próbuję dodać go do paska za pomocą content.add(new MouseMotionEvents())
to nie działa. Jestem nowy w свинге i JComponent
z, nie mógł by ktoś mi dać kilka rad?
public class test {
public static void main(String[] args) {
JFrame aWindow = new JFrame();
aWindow.setBounds(600, 600, 600, 600);
aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel content = new JPanel();
content.add(new MouseMotionEvents());
aWindow.add(content);
aWindow.setVisible(true);
}
}
class MouseMotionEvents extends JPanel implements MouseListener,
MouseMotionListener {
Point p;
Point r;
public MouseMotionEvents() {
addMouseListener(this);
addMouseMotionListener(this);
}
public void mouseClicked(MouseEvent me) {
// p = me.getPoint();
// repaint();
}
public void mouseEntered(MouseEvent me) {
}
public void mouseExited(MouseEvent me) {
}
public void mousePressed(MouseEvent me) {
p = me.getPoint();
// repaint();
}
public void mouseReleased(MouseEvent me) {
r = me.getPoint();
repaint();
}
public void mouseDragged(MouseEvent me) {
r = me.getPoint();
repaint();
}
public void mouseMoved(MouseEvent me) {
}
public void paint(Graphics g) {
if (p != null && r != null) {
Dimension d = getSize();
int xc = d.width / 2;
int yc = d.height / 2;
if(p.getX()-r.getX()>0 && p.getY()-r.getY()>0){
g.drawRect((int)p.getX(), (int)p.getY(), (int)(p.getX()-r.getX()), (int)(p.getY()-r.getY()));
}
if(p.getX()-r.getX()>0 && p.getY()-r.getY()<0){
g.drawRect((int)p.getX(), (int)p.getY(), (int)(p.getX()-r.getX()), (int)(-p.getY()+r.getY()));
}
if(p.getX()-r.getX()<0 && p.getY()-r.getY()>0){
g.drawRect((int)p.getX(), (int)p.getY(), (int)(-p.getX()+r.getX()), (int)(p.getY()-r.getY()));
}
if(p.getX()-r.getX()<0 && p.getY()-r.getY()<0){
g.drawRect((int)p.getX(), (int)p.getY(), (int)(-p.getX()+r.getX()), (int)(-p.getY()+r.getY()));
}
}
}
}