@Override
public void paintChild(MapValues map, GC gc, Location each) {
// draw semi-transparent background
gc.setAlpha(196);
gc.fillOval(each.px - diameter / 2, each.py - diameter / 2, diameter, diameter);
gc.setAlpha(255);
// draw image
gc.drawImage(image, each.px - bounds.width / 2, each.py - bounds.height / 2);
}
private void markPoint(double x, double y, String label, Color fg, Color bg, GC gc) {
gc.setForeground(black);
gc.setBackground(bg);
gc.fillOval((int) x - 3, (int) y - 3, 7, 7);
gc.drawOval((int) x - 3, (int) y - 3, 6, 6);
gc.setForeground(fg);
gc.setBackground(white);
if (y > 0) {
gc.drawText(label, (int) x + 8, (int) y + 4, true);
} else {
gc.drawText(label, (int) x + 10, (int) y - 10, true);
}
}
public void fillOval(int x, int y, int width, int height) {
_gc.fillOval(x, y, width, height);
}
private void drawGraph(PaintEvent e) {
GC gc = e.gc;
Point size = canvasCurve.getSize();
int gridSize = 50 - sliderZoom.getSelection();
Color black = new Color(canvasCurve.getDisplay(), 0, 0, 0);
Color grey = new Color(canvasCurve.getDisplay(), 235, 235, 235);
// first, draw the grid
gc.setForeground(grey);
for (int i = 0; i < size.x / 2; i += gridSize) {
gc.drawLine(size.x / 2 - i, 0, size.x / 2 - i, size.y);
gc.drawLine(size.x / 2 + i, 0, size.x / 2 + i, size.y);
}
for (int i = 0; i < size.y / 2; i += gridSize) {
gc.drawLine(0, size.y / 2 - i, size.x, size.y / 2 - i);
gc.drawLine(0, size.y / 2 + i, size.x, size.y / 2 + i);
}
// Draw the axis
gc.setForeground(black); // Black
gc.drawLine(size.x / 2, 0, size.x / 2, size.y);
gc.drawLine(0, size.y / 2, size.x, size.y / 2);
int labeljumps = 5;
int scale = (size.x / 2 / gridSize) - ((size.x / 2 / gridSize) % labeljumps);
if (scale > 50) labeljumps = 10;
for (int i = 0; i < size.x / 2; i += gridSize) {
if ((i / gridSize) % labeljumps == 0) {
gc.drawLine(size.x / 2 + i, size.y / 2 - 8, size.x / 2 + i, size.y / 2 + 8);
gc.drawLine(size.x / 2 - i, size.y / 2 - 8, size.x / 2 - i, size.y / 2 + 8);
gc.drawLine(size.x / 2 - 8, size.y / 2 + i, size.x / 2 + 8, size.y / 2 + i);
gc.drawLine(size.x / 2 - 8, size.y / 2 - i, size.x / 2 + 8, size.y / 2 - i);
int label = i / gridSize;
if (label < 10) {
if (label != 0) {
gc.drawText(label + "", size.x / 2 + i - 2, size.y / 2 + 10, true); // $NON-NLS-1$
gc.drawText(-label + "", size.x / 2 - i - 5, size.y / 2 + 10, true); // $NON-NLS-1$
gc.drawText(label + "", size.x / 2 + 13, size.y / 2 - i - 7, true); // $NON-NLS-1$
gc.drawText(-label + "", size.x / 2 + 13, size.y / 2 + i - 7, true); // $NON-NLS-1$
} else {
gc.drawText(label + "", size.x / 2 + i + 13, size.y / 2 + 10, true); // $NON-NLS-1$
}
} else {
gc.drawText(label + "", size.x / 2 + i - 6, size.y / 2 + 10, true); // $NON-NLS-1$
gc.drawText(-label + "", size.x / 2 - i - 10, size.y / 2 + 10, true); // $NON-NLS-1$
gc.drawText(label + "", size.x / 2 + 13, size.y / 2 - i - 7, true); // $NON-NLS-1$
gc.drawText(-label + "", size.x / 2 + 13, size.y / 2 + i - 7, true); // $NON-NLS-1$
}
} else {
gc.drawLine(size.x / 2 + i, size.y / 2 - 2, size.x / 2 + i, size.y / 2 + 2);
gc.drawLine(size.x / 2 - i, size.y / 2 - 2, size.x / 2 - i, size.y / 2 + 2);
gc.drawLine(size.x / 2 - 2, size.y / 2 + i, size.x / 2 + 2, size.y / 2 + i);
gc.drawLine(size.x / 2 - 2, size.y / 2 - i, size.x / 2 + 2, size.y / 2 - i);
}
}
if (points != null) {
gc.setForeground(blue);
double step = Math.pow((double) gridSize, -1);
double x1, y1, x2, y2;
for (int i = 2; i < points.length; i++) {
if (points[i - 2].y == 0) {
if (points[i - 1] != null && points[i - 1].y != 0) {
x1 = (double) points[i - 2].x / 100 / step + size.x / 2;
y1 = -(double) points[i - 2].y / 100 / step + size.y / 2;
x2 = (double) points[i - 1].x / 100 / step + size.x / 2;
y2 = -(double) points[i - 1].y / 100 / step + size.y / 2;
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
x1 = (double) points[i - 2].x / 100 / step + size.x / 2;
y1 = -(double) points[i - 2].y / 100 / step + size.y / 2;
x2 = (double) points[i].x / 100 / step + size.x / 2;
y2 = -(double) points[i].y / 100 / step + size.y / 2;
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
} else {
x1 = (double) points[i - 2].x / 100 / step + size.x / 2;
y1 = -(double) points[i - 2].y / 100 / step + size.y / 2;
x2 = (double) points[i - 3].x / 100 / step + size.x / 2;
y2 = -(double) points[i - 3].y / 100 / step + size.y / 2;
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
x1 = (double) points[i - 2].x / 100 / step + size.x / 2;
y1 = -(double) points[i - 2].y / 100 / step + size.y / 2;
x2 = (double) points[i - 4].x / 100 / step + size.x / 2;
y2 = -(double) points[i - 4].y / 100 / step + size.y / 2;
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
}
} else {
x1 = (double) points[i - 2].x / 100 / step + size.x / 2;
y1 = -(double) points[i - 2].y / 100 / step + size.y / 2;
x2 = (double) points[i].x / 100 / step + size.x / 2;
y2 = -(double) points[i].y / 100 / step + size.y / 2;
if ((int) Math.signum(points[i - 2].y + 0.0) == (int) Math.signum(points[i].y + 0.0)) {
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
}
}
if (points[points.length - 1].y == 0) {
x1 = (double) points[points.length - 1].x / 100 / step + size.x / 2;
y1 = -(double) points[points.length - 1].y / 100 / step + size.y / 2;
x2 = (double) points[points.length - 2].x / 100 / step + size.x / 2;
y2 = -(double) points[points.length - 2].y / 100 / step + size.y / 2;
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
x1 = (double) points[points.length - 1].x / 100 / step + size.x / 2;
y1 = -(double) points[points.length - 1].y / 100 / step + size.y / 2;
x2 = (double) points[points.length - 3].x / 100 / step + size.x / 2;
y2 = -(double) points[points.length - 3].y / 100 / step + size.y / 2;
gc.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
gc.drawLine((int) x1, (int) y1 + 1, (int) x2, (int) y2 + 1);
}
}
if (pointR != null && !pointR.isInfinite()) {
int rX;
int rY;
int lX;
int lY;
FpPoint p = pointP;
FpPoint q = pointQ;
FpPoint r = pointR;
if (q != null) {
if (p.x < q.x && p.x < r.x) { // if pointP is the most left point
lX = (int) ((double) p.x / 100 / step + size.x / 2);
lY = (int) ((double) -p.y / 100 / step + size.y / 2);
} else if (q.x < r.x) { // if pointQ is the most left point
lX = (int) ((double) q.x / 100 / step + size.x / 2);
lY = (int) ((double) -q.y / 100 / step + size.y / 2);
} else { // if pointR is the most left point
lX = (int) ((double) r.x / 100 / step + size.x / 2);
lY = (int) ((double) r.y / 100 / step + size.y / 2);
}
if (p.x > q.x && p.x > r.x) { // if pointP is the most right point
rX = (int) ((double) p.x / 100 / step + size.x / 2);
rY = (int) ((double) -p.y / 100 / step + size.y / 2);
} else if (q.x > r.x) { // if pointQ is the most right point
rX = (int) ((double) q.x / 100 / step + size.x / 2);
rY = (int) ((double) -q.y / 100 / step + size.y / 2);
} else { // if pointR is the most left point
rX = (int) ((double) r.x / 100 / step + size.x / 2);
rY = (int) ((double) r.y / 100 / step + size.y / 2);
}
} else {
if (p.x < r.x) { // if pointP is the most left point
lX = (int) ((double) p.x / 100 / step + size.x / 2);
lY = (int) ((double) -p.y / 100 / step + size.y / 2);
rX = (int) ((double) r.x / 100 / step + size.x / 2);
rY = (int) ((double) r.y / 100 / step + size.y / 2);
} else { // if pointR is the most left point
lX = (int) ((double) r.x / 100 / step + size.x / 2);
lY = (int) ((double) r.y / 100 / step + size.y / 2);
rX = (int) ((double) p.x / 100 / step + size.x / 2);
rY = (int) ((double) -p.y / 100 / step + size.y / 2);
}
}
int startX;
int endX;
int startY;
int endY;
if ((rX > lX ? rX - lX : lX - rX) > (rY > lY ? rY - lY : lY - rY)) {
double alfa = (double) (rY - lY) / (double) (rX - lX);
startX = lX - 30;
endX = rX + 30;
startY = lY - (int) (alfa * 30);
endY = rY + (int) (alfa * 30);
} else {
double alfa = (double) (rX - lX) / (double) (rY - lY);
startX = lX + (lY > rY ? (int) (alfa * 30) : -(int) (alfa * 30));
endX = rX + (lY > rY ? -(int) (alfa * 30) : (int) (alfa * 30));
;
startY = lY + (lY > rY ? 30 : -30);
endY = rY + (lY > rY ? -30 : 30);
}
if (startY < 0) {
double alfa = (double) (rX - lX) / (double) (rY - lY);
startX += (double) (-startY) * alfa;
startY = 0;
} else if (startY > size.y) {
double alfa = (double) (rX - lX) / (double) (rY - lY);
startX += -(double) (startY - size.y) * alfa;
startY = size.y;
}
if (endY < 0) {
double alfa = (double) (rX - lX) / (double) (rY - lY);
endX += (double) (-endY - 1) * alfa;
endY = -1;
} else if (endY > size.y) {
double alfa = (double) (rX - lX) / (double) (rY - lY);
endX -= (double) (endY - size.y) * alfa + 0.5;
endY = size.y;
}
gc.setForeground(darkPurple);
gc.setLineWidth(2);
gc.drawLine(startX, startY, endX, endY);
startX = (int) ((double) pointR.x / 100 / step + size.x / 2);
endX = startX;
if (pointR.y > 0) {
startY = (int) ((double) pointR.y / 100 / step + size.y / 2) + 30;
endY = (int) ((double) -pointR.y / 100 / step + size.y / 2) - 30;
} else {
startY = (int) ((double) pointR.y / 100 / step + size.y / 2) - 30;
endY = (int) ((double) -pointR.y / 100 / step + size.y / 2) + 30;
}
gc.setForeground(purple);
gc.drawLine(startX, startY, endX, endY);
gc.setLineWidth(1);
double x = (double) pointR.x / 100 / step + size.x / 2;
double y = (double) pointR.y / 100 / step + size.y / 2;
gc.setForeground(black);
gc.setBackground(darkPurple);
gc.fillOval((int) x - 3, (int) y - 3, 7, 7);
gc.drawOval((int) x - 3, (int) y - 3, 6, 6);
gc.setForeground(darkPurple);
gc.setBackground(white);
if (y < size.x / 2) {
gc.drawText("-R", (int) x + 8, (int) y + 4, true); // $NON-NLS-1$
} else {
gc.drawText("-R", (int) x + 8, (int) y - 10, true); // $NON-NLS-1$
}
} else if (pointP != null) {
gc.setForeground(darkPurple);
gc.setLineWidth(2);
int x = (int) ((double) pointP.x / 100 / step + size.x / 2);
gc.drawLine(x, 0, x, size.y);
gc.setLineWidth(1);
}
if (pointSelect != null) {
double x = (double) pointSelect.x / 100 / step + size.x / 2;
double y = -(double) pointSelect.y / 100 / step + size.y / 2;
String caption = "Q"; // $NON-NLS-1$
if (pointP == null) caption = "P"; // $NON-NLS-1$
markPoint(x, y, caption, black, lightBlue, gc);
}
if (pointP != null) {
double x = (double) pointP.x / 100 / step + size.x / 2;
double y = -(double) pointP.y / 100 / step + size.y / 2;
String caption = "P"; // $NON-NLS-1$
if (pointP.equals(pointQ)) caption = "P=Q"; // $NON-NLS-1$
if (pointP.equals(pointR)) caption = "P=R"; // $NON-NLS-1$
markPoint(x, y, caption, red, red, gc);
}
if (pointQ != null && !pointQ.equals(pointP)) {
double x = (double) pointQ.x / 100 / step + size.x / 2;
double y = -(double) pointQ.y / 100 / step + size.y / 2;
if (!pointQ.equals(pointP)) markPoint(x, y, "Q", red, red, gc); // $NON-NLS-1$
}
if (pointR != null && !pointR.isInfinite()) {
double x = (double) pointR.x / 100 / step + size.x / 2;
double y = -(double) pointR.y / 100 / step + size.y / 2;
markPoint(x, y, "R", purple, purple, gc); // $NON-NLS-1$
}
}
}