자바 예제
MouseMotionListener 이용해보자
1. 마우스에 별모양 따라 다니는 예제
import java.awt.*;
import java.awt.event.*;
class GraphicsEx2 extends Frame implements MouseMotionListener {
int x = 0;
int y = 0;
public static void main(String[] args) {
new GraphicsEx2("Graphics2");
}
public GraphicsEx2(String title){
super(title);
addMouseMotionListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we){
System.exit(0);
}
});
// Frame 을 (100, 100) 의 위치에 width 500, heigth 500 크기로 보이게한다.
setBounds(100, 100, 500, 500);
setVisible(true);
}
public void paint(Graphics g ){
g.drawString("마우스를 웁직여보세요." ,10, 50);
g.drawString("*" , x,y);
}
public void update(Graphics g){
paint(g);
}
public void mouseMoved(MouseEvent me){
x = me.getX();
y = me.getY();
repaint();
}
public void mouseDragged(MouseEvent me){}
} |
2. 버튼을 누르면 별로 그림을 그릴수있는 예제
import java.awt.*;
import java.awt.event.*;
class GraphicsEx4 extends Frame implements MouseMotionListener {
int x =0;
int y = 0;
Image img = null;
Graphics gImg = null;
public static void main(String args[]){
new GraphicsEx4("Graphics");
}
public GraphicsEx4(String title){
super(title);
addMouseMotionListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we){
System.exit(0);
}
});
//frame (100, 100, 500, 500);
setBounds(100,100, 500,500);
setVisible(true);
img = createImage(500, 500);
gImg = img.getGraphics();
gImg.drawString("왼쪽버튼을 누른 채로 마우스를 움직여보세요" , 10, 50);
repaint();
}
public void paint(Graphics g){
if(img!=null)
g.drawImage(img , 0 , 0, this); //가상화면에 그려진 그림을 Frame에 복사
}
public void mouseMoved(MouseEvent me){}
public void mouseDragged(MouseEvent me){
if(me.getModifiersEx()==MouseEvent.BUTTON1_DOWN_MASK){
x = me.getX();
y = me.getY();
gImg.drawString("*" ,x,y);
repaint();
}
}
} |
3. 마우스를 누르면 선으로 그림을 그릴수 있는 예제 import java.awt.*;
import java.awt.event.*;
class GraphicsEx5 extends Frame implements MouseMotionListener {
int x =0;
int y =0;
Image img = null;
Graphics gImg = null;
public static void main(String args[]){
new GraphicsEx5("Graphics");
}
public GraphicsEx5(String title){
super(title);
addMouseMotionListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we){
System.exit(0);
}
});
setBounds(100,100,500,500);
setVisible(true);
img = createImage(500,500);
gImg = img.getGraphics();/ gImg.drawString("왼쪽버튼을 누른채로 마우스를 움직여 보세요 ." , 10 ,50);
repaint();
}
public void paint(Graphics g){
if(img== null) return ;
g.drawImage(img, 0, 0, this);
}
public void mouseMoved(MouseEvent me){
x = me.getX();
y = me.getY();
}
public void mouseDragged(MouseEvent me){
if(me.getModifiersEx() != MouseEvent.BUTTON1_DOWN_M-*ASK) return ;
gImg.drawLine(x,y, me.getX(), me.getY());
x = me.getX();
y = me.getY();
repaint();
}
} |