private void drawString(String str, int x, int y) {
// text does not work correctly for very small scales.
if (textEnabled && scale > 0.05) {
gRef.drawString(str, x, y);
}
}
public void drawFunctionToGraphic(Graphics2D g, int x, int y, int UNITYX, int UNITYY) {
int _x, _y;
g.setColor(Color.red);
g.drawString("f(x) = " + F.toString(), 15, 20);
g.setColor(Color.blue);
for (double i = 0; ; i += EPSILON) {
_x = (int) (i * UNITYX) + x / 2;
_y = -(int) (F.evaluate(i) * UNITYY) + y / 2;
g.drawLine(
_x,
_y,
(int) ((i + EPSILON) * UNITYX) + x / 2,
-(int) (F.evaluate(i + EPSILON) * UNITYY) + y / 2);
if (_x < 0 || _x > x || _y < 0 || _y > y) break;
}
for (double i = 0; ; i -= EPSILON) {
_x = (int) (i * UNITYX) + x / 2;
_y = -(int) (F.evaluate(i) * UNITYY) + y / 2;
g.drawLine(
_x,
_y,
(int) ((i + EPSILON) * UNITYX) + x / 2,
-(int) (F.evaluate(i + EPSILON) * UNITYY) + y / 2);
if (_x < 0 || _x > x || _y < 0 || _y > y) break;
}
}
public void paintValue(Graphics g, Rectangle box) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(
RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
double[] values = (double[]) getValue();
StringBuilder s = new StringBuilder();
for (int i = 0; i < 3; i++) {
if (values.length > i) s.append(values[i]);
if (values.length > i + 1) s.append(", ");
}
if (values.length > 3) s.append("...");
g2.setPaint(Color.white);
g2.fill(box);
g2.setPaint(Color.black);
FontRenderContext context = g2.getFontRenderContext();
Rectangle2D stringBounds = g2.getFont().getStringBounds(s.toString(), context);
double w = stringBounds.getWidth();
double x = box.x;
if (w < box.width) x += (box.width - w) / 2;
double ascent = -stringBounds.getY();
double y = box.y + (box.height - stringBounds.getHeight()) / 2 + ascent;
g2.drawString(s.toString(), (float) x, (float) y);
}
public void draw(
Graphics2D g,
Color stringColor,
Color foreground,
Color background,
String info,
double x,
double y) {
FontMetrics fm = g.getFontMetrics();
int h = fm.getHeight();
int w = fm.stringWidth(info);
r1.setRect(
x - w / 2 - in.left, y - in.top - h / 2, w + in.right + in.left, h + in.bottom + in.top);
g.setColor(background);
g.fill(r1);
g.setColor(stringColor);
g.draw(r1);
g.setColor(foreground);
r2.setRect(r1.getX() + 1, r1.getY() + 1, r1.getWidth() - 2, r1.getHeight() - 2);
g.draw(r2);
g.setColor(stringColor);
g.drawString(
info, (float) (r2.getX() + in.left), (float) (r2.getY() + h - (r2.getHeight() - h) / 2));
}
private void paintCurrentMethodState(Graphics2D g2d) {
switch (type) {
case 0: // bisectiei
if (Cn.size() > 0) {
g2d.setColor(Color.green);
for (int pnt = 0; pnt < An.size(); pnt++) drawPoint(An.elementAt(pnt), g2d);
g2d.setColor(Color.orange);
for (int pnt = 0; pnt < Bn.size(); pnt++) drawPoint(Bn.elementAt(pnt), g2d);
g2d.setColor(Color.red);
drawPoint(Cn.lastElement(), g2d);
g2d.setColor(Color.blue);
g2d.drawString("Pasul " + Cn.size(), 15, 35);
g2d.drawString(
"[An, Bn] = [" + An.lastElement().x + ", " + Bn.lastElement().x + "]", 15, 50);
g2d.drawString("Cn = " + Cn.lastElement().x, 15, 65);
if (complete) {
g2d.setColor(Color.red);
g2d.drawString("Algoritm terminat in " + Cn.size() + " pasi.", 15, 80);
g2d.drawString(
"Rezultatule este " + Cn.lastElement().x + ", cu eroarea de +-" + err + ".",
15,
95);
}
}
break;
case 3: // newton
case 2: // secantei
case 1: // coardei
g2d.setColor(Color.green);
for (int pnt = 0; pnt < An.size() - 1; pnt++) drawPoint(An.elementAt(pnt), g2d);
g2d.setColor(Color.red);
drawPoint(An.lastElement(), g2d);
g2d.setColor(Color.blue);
g2d.drawString("Pasul " + An.size(), 15, 35);
if (type != 3)
g2d.drawString(
"[x0, x1] = [" + An.elementAt(0).x + ", " + An.elementAt(1).x + "]", 15, 50);
else g2d.drawString("x0 = " + An.elementAt(0).x, 15, 50);
g2d.drawString("xn = " + An.lastElement().x, 15, 65);
if (complete) {
g2d.setColor(Color.red);
g2d.drawString("Algoritm terminat in " + An.size() + " pasi.", 15, 80);
g2d.drawString(
"Rezultatule este " + An.lastElement().x + ", cu eroarea de +-" + err + ".", 15, 95);
}
break;
}
}