/**
* Constructor
*
* @param points an array of points
*/
public GPointsArray(GPointsArray points) {
this.points = new ArrayList<GPoint>(points.getNPoints());
for (int i = 0; i < points.getNPoints(); i++) {
this.points.add(new GPoint(points.get(i)));
}
}
/**
* Constructor
*
* @param parent the parent Processing applet
* @param type the histogram type. It can be GPlot.VERTICAL or GPlot.HORIZONTAL
* @param dim the plot box dimensions in pixels
* @param plotPoints the points positions in the plot reference system
*/
public GHistogram(PApplet parent, int type, float[] dim, GPointsArray plotPoints) {
this.parent = parent;
this.type = (type == GPlot.VERTICAL || type == GPlot.HORIZONTAL) ? type : GPlot.VERTICAL;
this.dim = dim.clone();
this.plotPoints = new GPointsArray(plotPoints);
visible = true;
separations = new float[] {2};
bgColors = new int[] {this.parent.color(150, 150, 255)};
lineColors = new int[] {this.parent.color(100, 100, 255)};
lineWidths = new float[] {1};
int nPoints = plotPoints.getNPoints();
differences = new ArrayList<Float>(nPoints);
leftSides = new ArrayList<Float>(nPoints);
rightSides = new ArrayList<Float>(nPoints);
initializeArrays(nPoints);
updateArrays();
labelsOffset = 8;
drawLabels = false;
rotateLabels = false;
fontName = "SansSerif.plain";
fontColor = this.parent.color(0);
fontSize = 11;
font = this.parent.createFont(fontName, fontSize);
}
/**
* Sets all the points in the array
*
* @param pts the new points. The number of points could differ from the original.
*/
public void set(GPointsArray pts) {
if (pts.getNPoints() == points.size()) {
for (int i = 0; i < points.size(); i++) {
points.get(i).set(pts.get(i));
}
} else if (pts.getNPoints() > points.size()) {
for (int i = 0; i < points.size(); i++) {
points.get(i).set(pts.get(i));
}
for (int i = points.size(); i < pts.getNPoints(); i++) {
points.add(new GPoint(pts.get(i)));
}
} else {
for (int i = 0; i < pts.getNPoints(); i++) {
points.get(i).set(pts.get(i));
}
points.subList(pts.getNPoints(), points.size()).clear();
}
}
/** 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));
}
}
/**
* Removes one of the points from the histogram
*
* @param index the point position
*/
public void removePlotPoint(int index) {
plotPoints.remove(index);
initializeArrays(plotPoints.getNPoints());
updateArrays();
}
/**
* Adds a new plot points to the histogram
*
* @param newPlotPoints the new points positions in the plot reference system
*/
public void addPlotPoints(GPointsArray newPlotPoints) {
plotPoints.add(newPlotPoints);
initializeArrays(plotPoints.getNPoints());
updateArrays();
}
/**
* Adds a new plot point to the histogram
*
* @param index the position to add the point
* @param newPlotPoint the new point position in the plot reference system
*/
public void addPlotPoint(int index, GPoint newPlotPoint) {
plotPoints.add(index, newPlotPoint);
initializeArrays(plotPoints.getNPoints());
updateArrays();
}
/**
* Sets one of the histogram plot points
*
* @param index the point position
* @param newPlotPoint the new point positions in the plot reference system
*/
public void setPlotPoint(int index, GPoint newPlotPoint) {
plotPoints.set(index, newPlotPoint);
updateArrays();
}
/** 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();
}
/**
* 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();
}
}
}
/**
* Adds a new set of points to the array
*
* @param pts the new set of points
*/
public void add(GPointsArray pts) {
for (int i = 0; i < pts.getNPoints(); i++) {
points.add(new GPoint(pts.get(i)));
}
}