private void findExtrema() {
max = 0;
for (Plot plot : plots) {
for (Point point : plot.getPoints()) {
if (point.coords[0] > max) max = point.coords[0];
}
}
}
/* (non-Javadoc)
* @see org.xidget.ifeature.chart.IPlotFeature#removePoint(org.xidget.chart.Plot, int)
*/
@Override
public void removePoint(Plot plot, int index) {
findExtrema();
repaint(plot.getPoints().get(index));
}
/**
* Paint bar chart with vertical bars.
*
* @param g2d The graphics.
*/
@SuppressWarnings("unchecked")
private void paintVertical(Graphics2D g2d) {
int width = getWidth() - 1 - LineChart.padWidth;
int height = getHeight() - 1 - LineChart.padHeight;
AffineTransform shift =
AffineTransform.getTranslateInstance(LineChart.padWidth / 2f, LineChart.padHeight / 2f);
AffineTransform transform = g2d.getTransform();
if (transform != null) transform.concatenate(shift);
else transform = shift;
g2d.setTransform(transform);
Toolkit toolkit = (Toolkit) Creator.getToolkit();
IColorFeature<Color, Graphics2D> colorFeature = toolkit.getFeature(IColorFeature.class);
// set grid color
g2d.setColor(getForeground());
// get label paragraphs
float maxLabelHeight = 0;
List<ParagraphLayout> labelLayouts = new ArrayList<ParagraphLayout>();
for (Plot plot : plots) {
for (Point point : plot.getPoints()) {
ParagraphLayout layout =
new ParagraphLayout(point.label, getFont(), Justify.center, g2d.getFontRenderContext());
labelLayouts.add(layout);
if (layout.getHeight() > maxLabelHeight) maxLabelHeight = layout.getHeight();
}
}
// adjust height of graph to accomodate labels
height -= maxLabelHeight + 3;
// draw vertical grid-lines
IScale yscale = (yAxis != null) ? yAxis.getScale() : null;
if (yscale != null) {
for (Tick tick : yscale.getTicks()) {
int y = (int) Math.round(yscale.plot(tick.value) * height);
g2d.drawLine(0, y, width, y);
}
} else {
for (int i = 0; i < max; i++) {
int y = (int) Math.round(i * width / max);
g2d.drawLine(0, y, width, y);
}
}
// ick... get number of points... i hate this schema
int n = 0;
for (Plot plot : plots) n += plot.getPoints().size();
if (n == 0) return;
// horizontal orientation
double wbt = width / n;
double wb = wbt * 0.5;
double x = wbt / 2;
for (Plot plot : plots) {
for (Point point : plot.getPoints()) {
plotBar.reset();
double x0 = x - (wb / 2);
double x1 = x + (wb / 2);
double y =
(yscale != null)
? yscale.plot(point.coords[0]) * height
: point.coords[0] * height / max;
if (y > 0) {
plotBar.moveTo(x0, height);
plotBar.lineTo(x0, height - y);
plotBar.lineTo(x1, height - y);
plotBar.lineTo(x1, height);
plotBar.lineTo(x0, height);
// draw bar
g2d.setColor(getBackground());
colorFeature.applyColor(plot.getBackground(), g2d, width, height);
g2d.fill(plotBar);
Stroke stroke = strokes.get(plot);
if (stroke != null) g2d.setStroke(stroke);
colorFeature.applyColor(plot.getForeground(), g2d, width, height);
g2d.draw(plotBar);
}
// draw text
colorFeature.applyColor(plot.getForeground(), g2d, width, height);
ParagraphLayout layout =
new ParagraphLayout(point.label, getFont(), Justify.center, g2d.getFontRenderContext());
layout.draw(g2d, (int) (x - (layout.getWidth() / 2)), height + 3);
x += wbt;
}
}
}
/**
* Paint bar chart with horizontal bars.
*
* @param g2d The graphics.
*/
@SuppressWarnings("unchecked")
private void paintHorizontal(Graphics2D g2d) {
int width = getWidth() - 1 - LineChart.padWidth;
int height = getHeight() - 1 - LineChart.padHeight;
AffineTransform shift =
AffineTransform.getTranslateInstance(LineChart.padWidth / 2f, LineChart.padHeight / 2f);
AffineTransform transform = g2d.getTransform();
if (transform != null) transform.concatenate(shift);
else transform = shift;
g2d.setTransform(transform);
Toolkit toolkit = (Toolkit) Creator.getToolkit();
IColorFeature<Color, Graphics2D> colorFeature = toolkit.getFeature(IColorFeature.class);
// draw gradient background
// GradientPaint paint = new GradientPaint( 0, 0, Color.white, 0, height, Color.lightGray);
// g2d.setPaint( paint);
// g2d.fillRect( 0, 0, width, height);
// set grid color
g2d.setColor(getForeground());
FontMetrics metrics = g2d.getFontMetrics();
// draw vertical grid-lines
IScale xscale = (xAxis != null) ? xAxis.getScale() : null;
if (xscale != null) {
for (Tick tick : xscale.getTicks()) {
int x = (int) Math.round(xscale.plot(tick.value) * width);
g2d.drawLine(x, 0, x, height);
}
} else {
for (int i = 0; i < max; i++) {
int x = (int) Math.round(i * width / max);
g2d.drawLine(x, 0, x, height);
}
}
// ick... get number of points... i hate this schema
int n = 0;
for (Plot plot : plots) n += plot.getPoints().size();
// horizontal orientation
double hbt = height / (n + 1);
double hb = hbt * 0.75;
double y = hbt;
for (Plot plot : plots) {
for (Point point : plot.getPoints()) {
plotBar.reset();
double y0 = y - (hb / 2);
double y1 = y + (hb / 2);
double x =
(xscale != null) ? xscale.plot(point.coords[0]) * width : point.coords[0] * width / max;
if (x > 0) {
plotBar.moveTo(0, y0);
plotBar.lineTo(x, y0);
plotBar.lineTo(x, y1);
plotBar.lineTo(0, y1);
plotBar.lineTo(0, y0);
// draw bar
g2d.setColor(getBackground());
colorFeature.applyColor(plot.getBackground(), g2d, width, height);
g2d.fill(plotBar);
Stroke stroke = strokes.get(plot);
if (stroke != null) g2d.setStroke(stroke);
colorFeature.applyColor(plot.getForeground(), g2d, width, height);
g2d.draw(plotBar);
}
// draw text
double textWidth = metrics.stringWidth(point.label);
double textX = (x / 2) - (textWidth / 2);
if (textWidth > (x + textPad * 2)) textX = x + textPad;
g2d.drawString(point.label, (float) textX, (float) (y + metrics.getAscent() / 2));
y += hbt;
}
}
}