// From: http://forum.java.sun.com/thread.jspa?threadID=378460&tstart=135
void drawArrow(
Graphics2D g2d,
int xCenter,
int yCenter,
int x,
int y,
float stroke,
BasicStroke drawStroke) {
double aDir = Math.atan2(xCenter - x, yCenter - y);
// Line can be dashed.
g2d.setStroke(drawStroke);
g2d.drawLine(x, y, xCenter, yCenter);
// make the arrow head solid even if dash pattern has been specified
g2d.setStroke(lineStroke);
Polygon tmpPoly = new Polygon();
int i1 = 12 + (int) (stroke * 2);
// make the arrow head the same size regardless of the length length
int i2 = 6 + (int) stroke;
tmpPoly.addPoint(x, y);
tmpPoly.addPoint(x + xCor(i1, aDir + .5), y + yCor(i1, aDir + .5));
tmpPoly.addPoint(x + xCor(i2, aDir), y + yCor(i2, aDir));
tmpPoly.addPoint(x + xCor(i1, aDir - .5), y + yCor(i1, aDir - .5));
tmpPoly.addPoint(x, y); // arrow tip
g2d.drawPolygon(tmpPoly);
// Remove this line to leave arrow head unpainted:
g2d.fillPolygon(tmpPoly);
}
void drawLine(Graphics g, DrawObject L) {
if (L == null) {
return;
}
if ((sequencingOn) && (L.sequenceNum != currentSequenceNumDisplay)) {
return;
}
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(L.drawStroke);
int x1 = (int) ((L.x - minX) / (maxX - minX) * (D.width - 2 * inset));
int y1 = (int) ((L.y - minY) / (maxY - minY) * (D.height - 2.0 * inset));
int x2 = (int) ((L.x2 - minX) / (maxX - minX) * (D.width - 2 * inset));
int y2 = (int) ((L.y2 - minY) / (maxY - minY) * (D.height - 2.0 * inset));
if (L.isArrow) {
drawArrow(
(Graphics2D) g,
inset + x1,
D.height - y1 - inset,
inset + x2,
D.height - y2 - inset,
1.0f,
L.drawStroke);
} else {
g.drawLine(inset + x1, D.height - y1 - inset, inset + x2, D.height - y2 - inset);
}
}
/** paint the canvas into a image file of given width and height */
public void writeToImage(String s, int w, int h) {
String ext;
File f;
try {
ext = s.substring(s.lastIndexOf(".") + 1);
f = new File(s);
} catch (Exception e) {
System.out.println(e);
return;
}
if (!ext.equals("jpg") && !ext.equals("png")) {
System.out.println("Cannot write to file: Illegal extension " + ext);
return;
}
boolean opq = true;
if (theOpaque != null) opq = theOpaque;
BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
g2.setBackground(Color.white);
g2.setPaint(Color.black);
g2.setStroke(new BasicStroke(1));
g2.setRenderingHint(
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
doBuffer(g2, true, new Rectangle(0, 0, w, h));
try {
ImageIO.write(image, ext, f);
} catch (Exception e) {
System.out.println(e);
}
}
private synchronized void doBuffer(Graphics2D g2, boolean opq, Rectangle rt) {
origTransform = g2.getTransform();
if (opq && rt != null) g2.clearRect(rt.x, rt.y, rt.width, rt.height);
g2.setPaint(origPaint);
g2.setFont(origFont);
g2.setStroke(origStroke);
if (inBuffer) { // System.out.println("upps");
for (int i = 0; i < a1x.size(); i++) doPaint(g2, a1x.get(i), a2x.get(i));
origTransform = null;
return;
}
for (int i = 0; i < a1.size(); i++) doPaint(g2, a1.get(i), a2.get(i));
origTransform = null;
}
void drawOvalOrRectangle(Graphics g, DrawObject R, boolean isRect) {
if (R == null) {
return;
}
if ((sequencingOn) && (R.sequenceNum != currentSequenceNumDisplay)) {
return;
}
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(R.drawStroke);
int x1 = (int) ((R.x - minX) / (maxX - minX) * (D.width - 2 * inset));
int y1 = (int) ((R.y - minY) / (maxY - minY) * (D.height - 2.0 * inset));
double x = R.x + R.width;
double y = R.y - R.height;
int x2 = (int) ((x - minX) / (maxX - minX) * (D.width - 2 * inset));
int y2 = (int) ((y - minY) / (maxY - minY) * (D.height - 2.0 * inset));
if (isRect) {
g.drawRect(inset + x1, D.height - y1 - inset, x2 - x1, y1 - y2);
} else {
g.drawOval(inset + x1, D.height - y1 - inset, x2 - x1, y1 - y2);
}
}
private synchronized void toBuffer(int s, Object a) {
a1.add(s);
a2.add(a);
if (s == clear) {
clearBuffer();
}
if (s == opaque) theOpaque = (Boolean) a;
if (s == setBackground) theBackground = (Color) a;
if (inBuffer) return;
if (isSetter(s)) return;
Graphics g = getGraphics();
if (g == null) return;
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(origPaint);
g2.setFont(origFont);
g2.setStroke(origStroke);
for (int i = 0; i < a1.size() - 1; i++) {
int s1 = a1.get(i);
Object s2 = a2.get(i);
if (isSetter(s1)) doPaint(g2, s1, s2);
}
doPaint((Graphics2D) g, s, a);
}
void drawScribbles(Graphics g) {
if ((scribbles == null) || (scribbles.size() == 0)) {
return;
}
DrawObject L = (DrawObject) scribbles.get(0);
int scribbleCounter = L.scribbleNum;
g.setColor(scribbleColor);
((Graphics2D) g).setStroke(new BasicStroke(2f));
int prevX = L.scribbleX;
int prevY = L.scribbleY;
for (int i = 1; i < scribbles.size(); i++) {
L = (DrawObject) scribbles.get(i);
if (L.scribbleNum == scribbleCounter) {
// Keep drawing.
g.drawLine(prevX, prevY, L.scribbleX, L.scribbleY);
prevX = L.scribbleX;
prevY = L.scribbleY;
} else {
scribbleCounter = L.scribbleNum;
prevX = L.scribbleX;
prevY = L.scribbleY;
}
}
}
public void paintProbe(Graphics2D g2, int x1, int y1, int x2, int y2, double tmin, double tmax) {
g2.setStroke(stroke);
g2.setColor(color);
int ppx = -1, ppy = -1;
for (int i = 0; i < values.size(); i++) {
Double v = values.get(i);
if (v != null && tmax - tmin > 0.0) {
double frac = (v - tmin) / (tmax - tmin);
int pixY = y2 - (int) Math.round(frac * (y2 - y1));
int pixX = x1 + (int) Math.floor((double) (i + 1) / (double) (values.size() + 2));
if (ppx != -1) {
g2.drawLine(ppx, ppy, pixX, pixY);
}
ppx = pixX;
ppy = pixY;
} else {
ppx = ppy = -1;
}
}
}
void drawEqnLine(Graphics g, DrawObject L) {
if (L == null) {
return;
}
if ((sequencingOn) && (L.sequenceNum != currentSequenceNumDisplay)) {
return;
}
// First, special cases:
if ((L.a == 0) && (L.b == 0)) {
return;
}
double px = 0, py = 0, qx = 0, qy = 0;
double leftX = px, rightX = qx, leftY = py, rightY = qy;
if (L.a == 0) {
// Case 2: a=0 => horizontal line.
leftX = minX;
rightX = maxX;
py = -L.c / L.b;
qy = -L.c / L.b;
if ((py < minY) || (py > maxY)) {
// Cannot display.
return;
}
leftY = rightY = py;
} else if (L.b == 0) {
// Case 3: b=0 => vertical line.
leftX = -L.c / L.a;
rightX = -L.c / L.a;
leftY = minY;
rightY = maxY;
if ((leftX < minX) || (leftX > maxX)) {
return;
}
} else {
// Case 4: regular.
// Note: the line could intersect the drawable region in weird ways.
px = (-L.c - L.b * minY) / L.a;
qx = (-L.c - L.b * maxY) / L.a;
py = (-L.c - L.a * minX) / L.b;
qy = (-L.c - L.a * maxX) / L.b;
// System.out.println ("px=" + px + " qx=" + qx + " py=" + py + " qy=" + qy);
// Find leftmost point to draw.
if ((py >= minY) && (py <= maxY)) {
// Leftmost point is on the x=minX line.
leftX = minX;
leftY = py;
// System.out.println ("case(a): leftmost on minX-line");
} else {
// Leftmost point is not on the x=minX line.
// Find leftmost point intersecting with low or high
if (px < qx) {
leftX = px;
leftY = minY;
// System.out.println ("case(a.1): on minY-line");
} else {
leftX = qx;
leftY = maxY;
// System.out.println ("case(a.2): on maxY-line");
}
}
// Now find rightmost point.
if ((qy >= minY) && (qy <= maxY)) {
// Rightmost point is on the x=maxX line.
rightX = maxX;
rightY = qy;
// System.out.println ("case(b): rightmost on maxX-line");
} else {
if (px > qx) {
rightX = px;
rightY = minY;
// System.out.println ("case(b.1): rightmost on minY-line");
} else {
rightX = qx;
rightY = maxY;
// System.out.println ("case(b.1): rightmost on maxY-line");
}
}
}
// System.out.println ("left:(" + leftX + "," + leftY + ") right:(" + rightX + "," + rightY +
// ")");
int x1 = (int) ((leftX - minX) / (maxX - minX) * (D.width - 2 * inset));
int y1 = (int) ((leftY - minY) / (maxY - minY) * (D.height - 2.0 * inset));
int x2 = (int) ((rightX - minX) / (maxX - minX) * (D.width - 2 * inset));
int y2 = (int) ((rightY - minY) / (maxY - minY) * (D.height - 2.0 * inset));
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(L.drawStroke);
g.drawLine(inset + x1, D.height - y1 - inset, inset + x2, D.height - y2 - inset);
}
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);
}
// also clip, transform, composite,
// public boolean isOpaque(){return false;}//theOpaque!=null&&theOpaque;}
// ---------------------------------------------------------
private void doPaint(Graphics2D g, int s, Object o) {
// process an operation from the buffer
// System.out.println(s);
Object o1 = null,
o2 = null,
o3 = null,
o4 = null,
o5 = null,
o6 = null,
o7 = null,
o8 = null,
o9 = null,
o10 = null,
o11 = null;
if (o instanceof Object[]) {
Object[] a = (Object[]) o;
if (a.length > 0) o1 = a[0];
if (a.length > 1) o2 = a[1];
if (a.length > 2) o3 = a[2];
if (a.length > 3) o4 = a[3];
if (a.length > 4) o5 = a[4];
if (a.length > 5) o6 = a[5];
if (a.length > 6) o7 = a[6];
if (a.length > 7) o8 = a[7];
if (a.length > 8) o9 = a[8];
if (a.length > 9) o10 = a[9];
if (a.length > 10) o11 = a[10];
}
switch (s) {
case clear:
paintBackground(g, theBackground);
break;
// public void addRenderingHints(Map<?,?> hints)
// {toBuffer("addRenderingHints",hints );}
case addRenderingHints:
g.addRenderingHints((Map<?, ?>) o);
break;
case clip1:
g.clip((Shape) o);
break;
case draw1:
g.draw((Shape) o);
break;
case draw3DRect:
g.draw3DRect((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Boolean) o5);
break;
case drawGlyphVector:
g.drawGlyphVector((GlyphVector) o1, (Float) o2, (Float) o3);
break;
case drawImage1:
g.drawImage((BufferedImage) o1, (BufferedImageOp) o2, (Integer) o3, (Integer) o4);
break;
case drawImage2:
g.drawImage((Image) o1, (AffineTransform) o2, (ImageObserver) o3);
break;
case drawRenderableImage:
g.drawRenderableImage((RenderableImage) o1, (AffineTransform) o2);
break;
case drawRenderedImage:
g.drawRenderedImage((RenderedImage) o1, (AffineTransform) o2);
break;
case drawString1:
g.drawString((AttributedCharacterIterator) o1, (Float) o2, (Float) o3);
break;
case drawString2:
g.drawString((AttributedCharacterIterator) o1, (Integer) o2, (Integer) o3);
break;
case drawString3:
g.drawString((String) o1, (Float) o2, (Float) o3);
break;
case drawString4:
g.drawString((String) o1, (Integer) o2, (Integer) o3);
break;
case fill:
g.fill((Shape) o);
break;
case fill3DRect:
g.fill3DRect((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Boolean) o5);
break;
case rotate1:
g.rotate((Double) o);
break;
case rotate2:
g.rotate((Double) o1, (Double) o2, (Double) o3);
break;
case scale1:
g.scale((Double) o1, (Double) o2);
break;
case setBackground:
g.setBackground(
(Color) o); // paintBackground(g,(Color)o); /*super.setBackground((Color)o) ;*/
break;
case setComposite:
g.setComposite((Composite) o);
break;
case setPaint:
g.setPaint((Paint) o);
break;
case setRenderingHint:
g.setRenderingHint((RenderingHints.Key) o1, o2);
break;
case setRenderingHints:
g.setRenderingHints((Map<?, ?>) o);
break;
case setStroke:
g.setStroke((Stroke) o);
break;
case setTransform:
g.setTransform(makeTransform(o));
break;
case shear:
g.shear((Double) o1, (Double) o2);
break;
case transform1:
g.transform(makeTransform(o));
break;
case translate1:
g.translate((Double) o1, (Double) o2);
break;
case translate2:
g.translate((Integer) o1, (Integer) o2);
break;
case clearRect:
g.clearRect((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4);
break;
case copyArea:
g.copyArea(
(Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5, (Integer) o6);
break;
case drawArc:
g.drawArc(
(Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5, (Integer) o6);
break;
case drawBytes:
g.drawBytes((byte[]) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5);
break;
case drawChars:
g.drawChars((char[]) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5);
break;
case drawImage4:
g.drawImage((Image) o1, (Integer) o2, (Integer) o3, (Color) o4, (ImageObserver) o5);
break;
case drawImage5:
g.drawImage((Image) o1, (Integer) o2, (Integer) o3, (ImageObserver) o4);
break;
case drawImage6:
g.drawImage(
(Image) o1,
(Integer) o2,
(Integer) o3,
(Integer) o4,
(Integer) o5,
(Color) o6,
(ImageObserver) o7);
break;
case drawImage7:
g.drawImage(
(Image) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5, (ImageObserver) o6);
break;
case drawImage8:
g.drawImage(
(Image) o1,
(Integer) o2,
(Integer) o3,
(Integer) o4,
(Integer) o5,
(Integer) o6,
(Integer) o7,
(Integer) o8,
(Integer) o9,
(Color) o10,
(ImageObserver) o11);
break;
case drawImage9:
g.drawImage(
(Image) o1,
(Integer) o2,
(Integer) o3,
(Integer) o4,
(Integer) o5,
(Integer) o6,
(Integer) o7,
(Integer) o8,
(Integer) o9,
(ImageObserver) o10);
break;
case drawLine:
g.drawLine((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4);
break;
case drawOval:
g.drawOval((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4);
break;
case drawPolygon1:
g.drawPolygon((int[]) o1, (int[]) o2, (Integer) o3);
break;
case drawPolygon2:
g.drawPolygon((Polygon) o);
break;
case drawPolyline:
g.drawPolyline((int[]) o1, (int[]) o2, (Integer) o3);
break;
case drawRect:
g.drawRect((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4);
break;
case drawRoundRect:
g.drawRoundRect(
(Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5, (Integer) o6);
break;
case fillArc:
g.fillArc(
(Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5, (Integer) o6);
break;
case fillOval:
g.fillOval((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4);
break;
// {toBuffer("fillPolygon",mkArg(xPoints, yPoints, nPoints) );}
case fillPolygon1:
g.fillPolygon((int[]) o1, (int[]) o2, (Integer) o3);
break;
case fillPolygon2:
g.fillPolygon((Polygon) o);
break;
case fillRect:
g.fillRect((Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4);
break;
case fillRoundRect:
g.fillRoundRect(
(Integer) o1, (Integer) o2, (Integer) o3, (Integer) o4, (Integer) o5, (Integer) o6);
break;
case setClip1:
g.setClip((Shape) o);
break;
case setColor:
g.setColor((Color) o);
break;
case setFont:
g.setFont((Font) o);
break;
case setPaintMode:
g.setPaintMode();
break;
case setXORMode:
g.setXORMode((Color) o);
break;
case opaque:
super.setOpaque((Boolean) o);
break;
case drawOutline: // g.drawString((String)o1, (Integer)o2, (Integer)o3) ;break;
{
FontRenderContext frc = g.getFontRenderContext();
TextLayout tl = new TextLayout((String) o1, g.getFont(), frc);
Shape s1 = tl.getOutline(null);
AffineTransform af = g.getTransform();
g.translate((Integer) o2, (Integer) o3);
g.draw(s1);
g.setTransform(af);
}
;
break;
default:
System.out.println("Unknown image operation " + s);
}
}