import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Font;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.util.ArrayList;
class Scribbling {
String what;
int xpos;
int ypos;
double angle;
Font font;
Color col;
}
class WritePanel extends JPanel {
private Graphics2D g;
private ArrayList<Scribbling> text = new ArrayList<Scribbling>();
private void doWriting(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
Font font = getFont();
Color col = g.getColor();
double angle = 0;
AffineTransform orig = g2d.getTransform();
for (Scribbling s: text) {
if (s.angle != angle) {
g2d.setTransform(orig);
g2d.rotate(s.angle * Math.PI / 180.0);
angle = s.angle;
}
if (s.font != null && !s.font.equals(font)) {
g2d.setFont(s.font);
font = g2d.getFont();
}
if (!s.col.equals(col)) {
col = new Color(s.col.getRGB());
g2d.setColor(col);
}
g2d.drawString(s.what, s.xpos, s.ypos);
}
}
public void addText(String what, int xpos, int ypos,
double angle, Font font, Color col) {
Scribbling s = new Scribbling();
s.what = what;
s.xpos = xpos;
s.ypos = ypos;
s.angle = angle;
s.font = font;
s.col = col;
text.add(s);
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
doWriting(g);
}
}
/**
* Textboard is in fact a full graphical application that displays
* text in a graphical Window
*/
public class TextBoard extends JFrame {
private WritePanel board;
private double currentAngle;
private Color currentColor;
private Font currentFont;
/**
* Only constructor.
*
* @param width Width of the window in pixels
* @param height Height of the window in pixels
* @param col Background color
*/
public TextBoard(int width, int height, Color col) {
board = new WritePanel();
// Put the WritePanel into the main window
add(board);
// Set its background color
board.setOpaque(true);
board.setBackground(col);
// Initial settings
currentAngle = 0;
currentColor = Color.BLACK;
currentFont = getFont();
// Geometry of the main window
setSize(width, height);
setLocationRelativeTo(null);
// When users close the window, we quit the application
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(false);
}
// Overloaded methods to write text
/**
* Write text to the screen
* <p>
* The text can be written at any position, it can be
* rotated, the font and color can be changed. Every piece
* of text is added to a list, and only written when the
* window is drawn.
*
* @param what The text to write
* @param xpos Horizontal position in pixels, from the left hand side
* @param ypos Vertical position in pixels, from the top
* @param angle Rotation angle in degrees
* @param font Font to use to write the text
* @param col Text color
*/
public void write(String what, int xpos, int ypos,
double angle, Font font, Color col) {
if (currentAngle != angle) {
currentAngle = angle;
}
if (currentFont != null && !currentFont.equals(font)) {
currentFont = font;
}
if (!currentColor.equals(col)) {
currentColor = new Color(col.getRGB());
}
board.addText(what, xpos, ypos, angle, font, col);
}
/**
* Write text to the screen
* <p>
* Use the last set angle (0 by default), font and color
* (black by default).
*
* @param what The text to write
* @param xpos Horizontal position in pixels, from the left hand side
* @param ypos Vertical position in pixels, from the top
*/
public void write(String what, int xpos, int ypos) {
write(what, xpos, ypos, currentAngle, currentFont, currentColor);
}
/**
* Write text to the screen
* <p>
* Use the last set font and color (black by default), set the angle.
*
* @param what The text to write
* @param xpos Horizontal position in pixels, from the left hand side
* @param ypos Vertical position in pixels, from the top
* @param angle Rotation angle in degrees
*/
public void write(String what, int xpos, int ypos, double angle) {
write(what, xpos, ypos, angle, currentFont, currentColor);
}
/**
* Write text to the screen
* <p>
* Use the last set font, set angle and color.
*
* @param what The text to write
* @param xpos Horizontal position in pixels, from the left hand side
* @param ypos Vertical position in pixels, from the top
* @param angle Rotation angle in degrees
* @param col Text color
*/
public void write(String what, int xpos, int ypos,
double angle, Color col) {
write(what, xpos, ypos, angle, currentFont, col);
}
/**
* Write text to the screen
* <p>
* Use the last set angle(0 by default) and font, set the color.
*
* @param what The text to write
* @param xpos Horizontal position in pixels, from the left hand side
* @param ypos Vertical position in pixels, from the top
* @param col Text color
*/
public void write(String what, int xpos, int ypos, Color col) {
write(what, xpos, ypos, currentAngle, currentFont, col);
}
/**
* Write text to the screen
* <p>
* Use the last set angle (0 by default), set font and color.
*
* @param what The text to write
* @param xpos Horizontal position in pixels, from the left hand side
* @param ypos Vertical position in pixels, from the top
* @param font Font to use to write the text
* @param col Text color
*/
public void write(String what, int xpos, int ypos,
Font font, Color col) {
write(what, xpos, ypos, currentAngle, font, col);
}
/**
* Show the window
*/
public void display() {
this.setVisible(true);
}
}
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