// init
private static void init() {
if (frame != null) frame.setVisible(false);
frame = new JFrame();
offscreenImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
onscreenImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
offscreen = offscreenImage.createGraphics();
onscreen = onscreenImage.createGraphics();
setXscale();
setYscale();
offscreen.setColor(DEFAULT_CLEAR_COLOR);
offscreen.fillRect(0, 0, width, height);
setPenColor();
setPenRadius();
setFont();
clear();
// add antialiasing
RenderingHints hints =
new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
offscreen.addRenderingHints(hints);
// frame stuff
ImageIcon icon = new ImageIcon(onscreenImage);
JLabel draw = new JLabel(icon);
draw.addMouseListener(std);
draw.addMouseMotionListener(std);
frame.setContentPane(draw);
frame.addKeyListener(std); // JLabel cannot get keyboard focus
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // closes all windows
// frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); // closes only current window
frame.setTitle("Standard Draw");
frame.setJMenuBar(createMenuBar());
frame.pack();
frame.requestFocusInWindow();
frame.setVisible(true);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
RenderingHints rh = g2d.getRenderingHints();
rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
rh.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHints(rh);
// Background.
D = this.getSize();
g.setColor(backgroundColor);
g.fillRect(0, 0, D.width, D.height);
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(lineStroke);
// Axes, bounding box.
g.setColor(Color.gray);
g.drawLine(inset, D.height - inset, D.width - inset, D.height - inset);
g.drawLine(D.width - inset, inset, D.width - inset, D.height - inset);
g.drawLine(inset, inset, inset, D.height - inset);
g.drawLine(inset, inset, D.width - inset, inset);
double xDelta = (maxX - minX) / numIntervals;
// X-ticks and labels.
for (int i = 1; i <= numIntervals; i++) {
double xTickd = i * xDelta;
int xTick = (int) (xTickd / (maxX - minX) * (D.width - 2 * inset));
g.drawLine(inset + xTick, D.height - inset - 5, inset + xTick, D.height - inset + 5);
double x = minX + i * xDelta;
g.drawString(df.format(x), xTick + inset - 5, D.height - inset + 20);
}
// Y-ticks
double yDelta = (maxY - minY) / numIntervals;
for (int i = 0; i < numIntervals; i++) {
int yTick = (i + 1) * (int) ((D.height - 2 * inset) / (double) numIntervals);
g.drawLine(inset - 5, D.height - yTick - inset, inset + 5, D.height - yTick - inset);
double y = minY + (i + 1) * yDelta;
g.drawString(df.format(y), 1, D.height - yTick - inset);
}
// Zoom+move
Font savedFont = g.getFont();
g.setFont(plusFont);
g.drawString("+", D.width - 25, 20);
g.setFont(minusFont);
g.drawString("-", D.width - 25, 50);
drawArrow(g2d, D.width - 70, 20, D.width - 70, 0, 1.0f, lineStroke); // Up
drawArrow(g2d, D.width - 70, 30, D.width - 70, 50, 1.0f, lineStroke); // Down
drawArrow(g2d, D.width - 65, 25, D.width - 45, 25, 1.0f, lineStroke); // Right
drawArrow(g2d, D.width - 75, 25, D.width - 95, 25, 1.0f, lineStroke); // Left
g.setFont(savedFont);
// See if standard axes are in the middle.
g.setColor(Color.gray);
if ((minX < 0) && (maxX > 0) && (drawMiddleAxes)) {
// Draw y-axis
int x = (int) ((0 - minX) / (maxX - minX) * (D.width - 2 * inset));
g.drawLine(inset + x, D.height - inset, inset + x, inset);
}
if ((minY < 0) && (maxY > 0) && (drawMiddleAxes)) {
// Draw x-axis
int y = (int) ((0 - minY) / (maxY - minY) * (D.height - 2.0 * inset));
g.drawLine(inset, D.height - y - inset, D.width - inset, D.height - y - inset);
}
// Draw the objects.
drawObjects(g, points, lines, ovals, rectangles, images, labels, eqnLines);
if (animationMode) {
drawObjects(g, animPoints, animLines, animOvals, animRectangles, null, labels, eqnLines);
// No images in animation mode.
}
drawScribbles(g);
}
static {
_renderHints =
new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
_renderHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
}
