Tammet – 24. oktoober 2005, kell 09:50

2005-10-24T09:50:01Z

Uus lehekülg

<pre>
// A simple window containing a working button, plus some text fields
// doing some drawing when you push the button

// NB! We have several layers in visual app here, each containing the lower ones:
// - frame (JFrame, ie a window)
// - toppanel (ordinary JPanel) with BorderLayout
// - buttonpanel (ordinary Jpanel), at NORTH
// - drawpanel (our DrawPanel, which is a variation of JPanel class), at CENTER

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class guiexample {

// creates a small window with a text and a button in it
public static void main(String[] args) {

// create new frame

JFrame frame = new guiexampleFrame();

// Set a window look-and-feel
try {
UIManager.setLookAndFeel
// ("javax.swing.plaf.metal.MetalLookAndFeel");
// ("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
SwingUtilities.updateComponentTreeUI(frame);
frame.pack();
} catch (Exception exc) {
System.err.println("Could not load given LookAndFeel!");
}

// react to window close, pack stuff, show out
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400,400);
frame.setLocation(200,200);
//frame.pack(); // give a suitable size to window automatically
frame.setVisible(true); // make window visible
//panel.updateState(); // refresh panel
}

}

class guiexampleFrame extends JFrame {

guiexampleFrame frame;
JPanel toppanel;
JPanel buttonpanel;
examplecanvas drawpanel;
JPanel buttonpanel2;
JTextField textfield1, textfield2;

guiexampleFrame() {

// create a new window and panels

toppanel = new JPanel();
buttonpanel = new JPanel();
buttonpanel2 = new JPanel();

// Create and add two text fields to button panel
//JTextField
textfield1 = new JTextField(10);
//JTextField
textfield2 = new JTextField(10);

drawpanel = new examplecanvas
(textfield1,textfield2);

// set layouts and colors of panels

buttonpanel.setLayout(new FlowLayout());
buttonpanel.setBackground(Color.blue);
toppanel.setLayout(new BorderLayout());
toppanel.setBackground(Color.green);

buttonpanel2.setLayout(new GridLayout(2,1));

// create and add components

// create a label widget with text, put on button panel
JLabel label = new JLabel("Hi!");
buttonpanel.add(label);

buttonpanel.add(textfield1);
buttonpanel.add(textfield2);

// Create and add a button to button panel
JButton button = new JButton("Press me, please!");
buttonpanel.add(button);

button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
drawpanel.repaint();
}
});

JButton button2 = new JButton("Ohoo");
JButton button3 = new JButton("Ehee");
buttonpanel2.add(button2);
buttonpanel2.add(button3);

// add button and drawpanels to toppanel
toppanel.add(BorderLayout.NORTH,buttonpanel);
toppanel.add(BorderLayout.WEST,buttonpanel2);
toppanel.add(BorderLayout.CENTER,drawpanel);

// add toppanel to the window
this.getContentPane().add(toppanel);

}
}

class examplecanvas extends Canvas {
Color textColor; // Color in which "Hello
// World" is displayed.
Font textFont; // The font in which the
// message is displayed.
JTextField textfield1,textfield2;

examplecanvas(JTextField t1,
JTextField t2) {
// Constructor.
textfield1=t1;
textfield2=t2;
setBackground(Color.green);
//textColor = Color.red;
//textFont = new
// Font("Serif",Font.BOLD,24);
}

public void paint(Graphics g) {

g.drawString("haa",100,200);

Font timesFont = new Font("Serif", Font.PLAIN, 16);
g.setFont(timesFont);
g.setColor( Color.blue);
g.drawString(textfield1.getText(), 50,250);
g.drawString(textfield2.getText(), 100,300);
//g.drawString("suva", 50,250);

g.drawLine(0,0,300,300);

g.drawRect(40,60,90,110);

for (int i=0; i<100; i++) {
g.drawLine(20,30,70,70+i);
}
}

void setTextColor(Color color) {
// Set the text color and tell the system
// to repaint the canvas.
textColor = color;
repaint();
}
} // end class
</pre>

Guiexample.java - Redigeerimiste ajalugu

Tammet – 24. oktoober 2005, kell 09:50