private void updatePointLists() {
// find the number of points to draw
int n;
if (drawType == DrawType.STEP_GRAPH_CONTINUOUS || drawType == DrawType.STEP_GRAPH_JUMP) {
n = 2 * algo.getIntervals() - 1;
} else {
n = algo.getIntervals();
}
// adjust the lists
if (n > pts.size()) {
// add
for (int i = pts.size(); i < n; i++) {
addPt();
}
} else if (n < pts.size()) {
// remove
// for (int i = n; n < pts.size(); i++) {
// remove in reverse order!
for (int i = pts.size() - 1; i >= n; i--) {
pts.remove(i);
drawPoints.remove(i);
}
}
}
@Override
public void update() {
isVisible = geo.isEuclidianVisible();
if (!isVisible) return;
if (!geo.getDrawAlgorithm().equals(geo.getParentAlgorithm())) init();
labelVisible = geo.isLabelVisible();
updateStrokes(sum);
// init gp
gp = new GeneralPathClipped[algo.getIntervals()];
for (int i = 0; i < gp.length; i++) {
gp[i] = new GeneralPathClipped(view);
gp[i].reset();
}
double[] xVal = algo.getLeftBorder();
double[] yVal = algo.getValues();
double width = algo.getWidth();
int N = algo.getIntervals();
if (algo.hasPoints()) {
updatePointLists();
}
drawType = algo.getDrawType();
pointType = algo.getPointType();
int pointStyle;
if (algo.hasPoints() && pointType != POINT_NONE) {
if (pointType == POINT_LEFT || pointType == POINT_LEFT_OPEN_RIGHT) {
pointStyle = EuclidianStyleConstants.POINT_STYLE_DOT;
} else {
pointStyle = EuclidianStyleConstants.POINT_STYLE_CIRCLE;
}
for (int i = 0; i < N; i++) {
coords[0] = xVal[i];
coords[1] = yVal[i];
pts.get(i).setCoords(coords[0], coords[1], 1.0);
pts.get(i).setObjColor(geo.getObjectColor());
pts.get(i).setPointSize(2 + (geo.getLineThickness() + 1) / 3);
pts.get(i).setPointStyle(pointStyle);
if (pointType == POINT_RIGHT) {
pts.get(i).setEuclidianVisible(false);
}
drawPoints.get(i).update();
}
if (drawType == DrawType.STEP_GRAPH_CONTINUOUS || drawType == DrawType.STEP_GRAPH_JUMP) {
if (pointType == POINT_LEFT || pointType == POINT_LEFT_OPEN_RIGHT) {
pointStyle = EuclidianStyleConstants.POINT_STYLE_CIRCLE;
} else {
pointStyle = EuclidianStyleConstants.POINT_STYLE_DOT;
}
// step graph right points
for (int i = 0; i < N - 1; i++) {
coords[0] = xVal[i + 1];
coords[1] = yVal[i];
pts.get(N + i).setCoords(coords[0], coords[1], 1.0);
pts.get(N + i).setObjColor(geo.getObjectColor());
pts.get(N + i).setPointSize(2 + (geo.getLineThickness() + 1) / 3);
pts.get(N + i).setPointStyle(pointStyle);
if (pointType == POINT_LEFT) {
pts.get(N + i).setEuclidianVisible(false);
}
drawPoints.get(N + i).update();
}
}
}
double halfWidth = width / 2;
switch (drawType) {
case VERTICAL_BAR:
if (width <= 0) {
for (int i = 0; i < N; i++) {
coords[0] = xVal[i];
coords[1] = 0;
view.toScreenCoords(coords);
gp[i].moveTo(coords[0], coords[1]);
coords[0] = xVal[i];
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
}
} else {
for (int i = 0; i < N; i++) {
coords[0] = xVal[i];
coords[1] = 0;
view.toScreenCoords(coords);
gp[i].moveTo(coords[0], coords[1]);
coords[0] = xVal[i];
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
coords[0] = xVal[i] + width;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
coords[0] = xVal[i] + width;
coords[1] = 0;
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
coords[0] = xVal[i];
coords[1] = 0;
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
}
}
break;
case HORIZONTAL_BAR:
if (width <= 0) {
for (int i = 0; i < N; i++) {
coords[0] = 0;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].moveTo(coords[0], coords[1]);
coords[0] = xVal[i];
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
}
} else {
for (int i = 0; i < N; i++) {
coords[0] = 0;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].moveTo(coords[0], coords[1]);
coords[0] = xVal[i];
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
coords[0] = xVal[i];
coords[1] = yVal[i] + width;
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
coords[0] = 0;
coords[1] = yVal[i] + width;
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
coords[0] = 0;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
}
}
break;
case STEP_GRAPH_CONTINUOUS:
for (int i = 0; i < N - 1; i++) {
// move to start point
coords[0] = xVal[i] + halfWidth;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].moveTo(coords[0], coords[1]);
// across
coords[0] = xVal[i + 1] + halfWidth;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
// up
coords[0] = xVal[i + 1] + halfWidth;
coords[1] = yVal[i + 1];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
}
// up to last point
coords[0] = xVal[N - 1] + halfWidth;
coords[1] = yVal[N - 1];
view.toScreenCoords(coords);
gp[gp.length - 1].lineTo(coords[0], coords[1]);
break;
case STEP_GRAPH_JUMP:
for (int i = 0; i < N - 1; i++) {
// move to start point
coords[0] = xVal[i] + halfWidth;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].moveTo(coords[0], coords[1]);
// across
coords[0] = xVal[i + 1] + halfWidth;
coords[1] = yVal[i];
view.toScreenCoords(coords);
gp[i].lineTo(coords[0], coords[1]);
}
break;
}
// gp on screen?
isVisible = false;
// don't return here to make sure that getBounds() works for
// off screen points too
for (int i = 0; i < gp.length; i++) {
if (gp[i].intersects(0, 0, view.getWidth(), view.getHeight())) {
isVisible = true;
break;
}
}
// TODO: improve label position
if (labelVisible) {
xLabel = (int) coords[0];
yLabel = (int) coords[1] - view.getFontSize();
labelDesc = geo.getLabelDescription();
addLabelOffset();
}
}
