/** Draws the histogram labels */
protected void drawHistLabels() {
parent.pushStyle();
parent.textMode(MODEL);
parent.textFont(font);
parent.textSize(fontSize);
parent.fill(fontColor);
parent.noStroke();
if (type == GPlot.VERTICAL) {
if (rotateLabels) {
parent.textAlign(RIGHT, CENTER);
for (int i = 0; i < plotPoints.getNPoints(); i++) {
if (plotPoints.isValid(i) && plotPoints.getX(i) >= 0 && plotPoints.getX(i) <= dim[0]) {
parent.pushMatrix();
parent.translate(plotPoints.getX(i), labelsOffset);
parent.rotate(-HALF_PI);
parent.text(plotPoints.getLabel(i), 0, 0);
parent.popMatrix();
}
}
} else {
parent.textAlign(CENTER, TOP);
for (int i = 0; i < plotPoints.getNPoints(); i++) {
if (plotPoints.isValid(i) && plotPoints.getX(i) >= 0 && plotPoints.getX(i) <= dim[0]) {
parent.text(plotPoints.getLabel(i), plotPoints.getX(i), labelsOffset);
}
}
}
} else {
if (rotateLabels) {
parent.textAlign(CENTER, BOTTOM);
for (int i = 0; i < plotPoints.getNPoints(); i++) {
if (plotPoints.isValid(i) && -plotPoints.getY(i) >= 0 && -plotPoints.getY(i) <= dim[1]) {
parent.pushMatrix();
parent.translate(-labelsOffset, plotPoints.getY(i));
parent.rotate(-HALF_PI);
parent.text(plotPoints.getLabel(i), 0, 0);
parent.popMatrix();
}
}
} else {
parent.textAlign(RIGHT, CENTER);
for (int i = 0; i < plotPoints.getNPoints(); i++) {
if (plotPoints.isValid(i) && -plotPoints.getY(i) >= 0 && -plotPoints.getY(i) <= dim[1]) {
parent.text(plotPoints.getLabel(i), -labelsOffset, plotPoints.getY(i));
}
}
}
}
parent.popStyle();
}
/** Updates the differences, leftSides and rightSides arrays */
protected void updateArrays() {
int nPoints = plotPoints.getNPoints();
if (nPoints == 1) {
leftSides.set(0, (type == GPlot.VERTICAL) ? 0.2f * dim[0] : 0.2f * dim[1]);
rightSides.set(0, leftSides.get(0));
} else if (nPoints > 1) {
// Calculate the differences between consecutive points
for (int i = 0; i < nPoints - 1; i++) {
if (plotPoints.isValid(i) && plotPoints.isValid(i + 1)) {
float separation = separations[i % separations.length];
float diff;
if (type == GPlot.VERTICAL) {
diff = plotPoints.getX(i + 1) - plotPoints.getX(i);
} else {
diff = plotPoints.getY(i + 1) - plotPoints.getY(i);
}
if (diff > 0) {
differences.set(i, (diff - separation) / 2f);
} else {
differences.set(i, (diff + separation) / 2f);
}
} else {
differences.set(i, 0f);
}
}
// Fill the leftSides and rightSides arrays
leftSides.set(0, differences.get(0));
rightSides.set(0, differences.get(0));
for (int i = 1; i < nPoints - 1; i++) {
leftSides.set(i, differences.get(i - 1));
rightSides.set(i, differences.get(i));
}
leftSides.set(nPoints - 1, differences.get(nPoints - 2));
rightSides.set(nPoints - 1, differences.get(nPoints - 2));
}
}
/**
* Draws the histogram
*
* @param plotBasePoint the histogram base point in the plot reference system
*/
public void draw(GPoint plotBasePoint) {
if (visible) {
// Calculate the baseline for the histogram
float baseline = 0;
if (plotBasePoint.isValid()) {
baseline = (type == GPlot.VERTICAL) ? plotBasePoint.getY() : plotBasePoint.getX();
}
// Draw the rectangles
parent.pushStyle();
parent.rectMode(CORNERS);
parent.strokeCap(SQUARE);
for (int i = 0; i < plotPoints.getNPoints(); i++) {
if (plotPoints.isValid(i)) {
// Obtain the corners
float x1, x2, y1, y2;
if (type == GPlot.VERTICAL) {
x1 = plotPoints.getX(i) - leftSides.get(i);
x2 = plotPoints.getX(i) + rightSides.get(i);
y1 = plotPoints.getY(i);
y2 = baseline;
} else {
x1 = baseline;
x2 = plotPoints.getX(i);
y1 = plotPoints.getY(i) - leftSides.get(i);
y2 = plotPoints.getY(i) + rightSides.get(i);
}
if (x1 < 0) {
x1 = 0;
} else if (x1 > dim[0]) {
x1 = dim[0];
}
if (-y1 < 0) {
y1 = 0;
} else if (-y1 > dim[1]) {
y1 = -dim[1];
}
if (x2 < 0) {
x2 = 0;
} else if (x2 > dim[0]) {
x2 = dim[0];
}
if (-y2 < 0) {
y2 = 0;
} else if (-y2 > dim[1]) {
y2 = -dim[1];
}
// Draw the rectangle
float lw = lineWidths[i % lineWidths.length];
parent.fill(bgColors[i % bgColors.length]);
parent.stroke(lineColors[i % lineColors.length]);
parent.strokeWeight(lw);
if (Math.abs(x2 - x1) > 2 * lw && Math.abs(y2 - y1) > 2 * lw) {
parent.rect(x1, y1, x2, y2);
} else if ((type == GPlot.VERTICAL
&& x2 != x1
&& !(y1 == y2 && (y1 == 0 || y1 == -dim[1])))
|| (type == GPlot.HORIZONTAL
&& y2 != y1
&& !(x1 == x2 && (x1 == 0 || x1 == dim[0])))) {
parent.rect(x1, y1, x2, y2);
parent.line(x1, y1, x1, y2);
parent.line(x2, y1, x2, y2);
parent.line(x1, y1, x2, y1);
parent.line(x1, y2, x2, y2);
}
}
}
parent.popStyle();
// Draw the labels
if (drawLabels) {
drawHistLabels();
}
}
}
