글쓴이 :조신제 1998년 7월 25일 22:18:59
In Reply to: [에러] 메시지가 나는데요 한번만 더 부탁드립니다. posted by 최종철 on 1998년 7월 25일 21:13:36:
프린트 프로그램은 제가 잘 못 올려서 다시 올립니다.
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class PrintExample extends Frame {
private short last_x = 0, last_y = 0; // last click posistion
private Vector lines = new Vector(256,256); // store the scribble
private Properties printprefs = new Properties(); // store user preferences
public PrintExample() {
super("PrintExample");
// Add a print button.
this.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
Button b = new Button("Print");
this.add(b);
// Call the print() method when the button is clicked.
// Note anonymous class.
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { print(); }
});
// Exit when the user closes the window.
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) { System.exit(0); }
});
// Register other event types we're interested in -- for scribbling
enableEvents(AWTEvent.MOUSE_EVENT_MASK |
AWTEvent.MOUSE_MOTION_EVENT_MASK);
// Set our initial size and pop the window up.
this.setSize(400, 400);
this.show();
}
/** Redraw (or print) the scribble based on stored lines */
public void paint(Graphics g)
{
for(int i = 0; i < lines.size(); i++) {
Line l = (Line)lines.elementAt(i);
g.drawLine(l.x1, l.y1, l.x2, l.y2);
}
}
/** Print out the scribble */
void print() {
// Obtain a PrintJob and a Graphics object to use with it
Toolkit toolkit = this.getToolkit();
PrintJob job = toolkit.getPrintJob(this, "PrintExample", printprefs);
if (job == null) return; // If the user clicked Cancel in the print dialog
Graphics g = job.getGraphics();
// Give the output a larger top and left margin. Otherwise it will
// be scrunched up in the upper-left corner of the page.
g.translate(100, 100);
// Draw a border around the output area.
Dimension size = this.getSize();
g.drawRect(-1, -1, size.width+1, size.height+1);
// Set a clipping region so our scribbles don't go outside the border
// On-screen this happens automatically, but not on paper.
g.setClip(0, 0, size.width, size.height);
// Print this component and all components it contains
this.printAll(g); // Use print() if you don't want the button to show
// Finish up.
g.dispose(); // End the page
job.end(); // End the job
}
/** Called when the user clicks */
public void processMouseEvent(MouseEvent e)
{
if (e.getID() == MouseEvent.MOUSE_PRESSED) {
last_x = (short)e.getX(); // remember click position
last_y = (short)e.getY();
}
else super.processMouseEvent(e);
}
/** Called when the the user drags the mouse: does the scribbling */
public void processMouseMotionEvent(MouseEvent e)
{
if (e.getID() == MouseEvent.MOUSE_DRAGGED) {
Graphics g = getGraphics();
g.drawLine(last_x, last_y, e.getX(), e.getY()); // draw the line
lines.addElement(new Line(last_x, last_y, // and save the line
(short) e.getX(), (short)e.getY()));
last_x = (short) e.getX(); last_y = (short) e.getY();
}
else super.processMouseMotionEvent(e);
}
/** The main method. Create a PrintScribble() object and away we go! */
public static void main(String[] args)
{
PrintExample s = new PrintExample();
}
/** This nested toplevel helper class stores the coordinates
* of one line of the scribble. */
class Line {
public short x1, y1, x2, y2;
public Line(short x1, short y1, short x2, short y2) {
this.x1 = x1; this.y1 = y1; this.x2 = x2; this.y2 = y2;
}
}
}
CardLayout 프로그램은 제가 조금 손을 봤습니다.
고친 부분은 표시를 해 놓았어요..
import java.awt.* ;
import java.awt.event.* ;
public class CL extends java.applet.Applet
implements ActionListener {
CardLayout cl = new CardLayout();
Panel p, p1, p2, cards ;
public void init() {
setLayout(new BorderLayout()) ;
cards = new Panel() ;
p = new Panel();
add("North", p) ;
add("Center", cards) ;
//p = new Panel() ; <-- 이 부분 때문에 이벤트 처리하는 버튼이 출력되지 않았습니다.
p.add(new Label("Select Panel !!")) ;
Button button1 = new Button("Btn1");
button1.addActionListener(this); // listener에 등록을 해야 이벤트를 처리할 수가 있죠.
Button button2 = new Button("Btn2");
button2.addActionListener(this); // 위와 마찬가지..
p.add(button1) ;
p.add(button2) ;
// cards.setLayout(new CardLayout()) ; <-- 새롭게 CardLayout을 만들면 안되죠..
cards.setLayout(cl) ;
p1 = new Panel() ;
p1.setLayout(new GridLayout(2,2,10,10)) ;
p1.add(new Button("Label 1")) ;
p1.add(new Button("Label 2")) ;
p1.add(new Button("Label 3")) ;
p1.add(new Button("Label 4")) ;
cards.add("P1", p1) ;
p2 = new Panel() ;
p2.setLayout(new GridLayout(4,1,10,10)) ;
p2.add(new Button("Label 1")) ;
p2.add(new Button("Label 2")) ;
p2.add(new Button("Label 3")) ;
p2.add(new Button("Label 4")) ;
cards.add("P2", p2) ;
} // init
public void actionPerformed (ActionEvent e) {
if (e.getSource() instanceof Button) {
String label = ((Button)e.getSource()).getLabel() ;
if (label == "Btn1") { cl.show(cards, "P1") ; }
if (label == "Btn2") { cl.show(cards, "P2") ; }
} // instanceof Button
} // actionPerformed
} // top
수고 하세요...