private void drawLabels(Graphics2D g2d) {
final FontMetrics fontMetrics = g2d.getFontMetrics();
final int n = getNumGradationCurvePoints();
g2d.setStroke(new BasicStroke(2));
Color c1 = (foregroundColor != null ? foregroundColor : Color.black).brighter();
Color c2 = (backgroundColor != null ? backgroundColor : Color.white).darker();
for (int i = 0; i < n; i++) {
ColorPaletteDef.Point slider = getGradationCurvePointAt(i);
final double normalizedSample = normalizeSample(slider.getSample());
double sliderPos = normalizedSample * (palettePos2 - palettePos1);
double tx;
double ty;
if (orientation == HORIZONTAL) {
tx = palettePos1 + sliderPos;
ty = paletteRect.y + paletteRect.height;
} else {
tx = paletteRect.x + paletteRect.width;
ty = palettePos1 + sliderPos;
}
g2d.translate(tx, ty);
g2d.setPaint(slider.getColor());
g2d.fill(sliderShape);
int gray =
(slider.getColor().getRed() + slider.getColor().getGreen() + slider.getColor().getBlue())
/ 3;
g2d.setColor(gray < 128 ? c2 : c1);
g2d.draw(sliderShape);
float x0;
float y0;
if (orientation == HORIZONTAL) {
x0 = -0.5f * labelWidths[i];
y0 = _LABEL_GAP + fontMetrics.getMaxAscent();
} else {
x0 = _LABEL_GAP;
y0 = fontMetrics.getMaxAscent();
}
g2d.setPaint(foregroundColor);
g2d.drawString(labels[i], x0, y0);
g2d.translate(-tx, -ty);
}
}
private void initDrawing() {
final FontMetrics fontMetrics = createFontMetrics();
final int n = getNumGradationCurvePoints();
labels = new String[n];
labelWidths = new int[n];
int textHeight = fontMetrics.getHeight();
final double minValue = imageInfo.getColorPaletteDef().getMinDisplaySample();
final double maxValue = imageInfo.getColorPaletteDef().getMaxDisplaySample();
double roundFactor = MathUtils.computeRoundFactor(minValue, maxValue, 2);
for (int i = 0; i < n; i++) {
ColorPaletteDef.Point slider = getGradationCurvePointAt(i);
labels[i] = String.valueOf(MathUtils.round(slider.getSample(), roundFactor));
labelWidths[i] = fontMetrics.stringWidth(labels[i]);
}
int headerTextVSpace = 0;
int headerTextWidth = 0;
if (hasHeaderText()) {
headerTextVSpace = textHeight + _GAP;
headerTextWidth = fontMetrics.stringWidth(headerText);
}
int legendWidth = 0;
int legendHeight = 0;
int maxLabelWidth = 0;
for (int i = 0; i < n; i++) {
legendWidth += _LABEL_GAP + labelWidths[i];
legendHeight += 2 * textHeight;
maxLabelWidth = Math.max(labelWidths[i], maxLabelWidth);
}
if (orientation == HORIZONTAL) {
legendWidth = Math.max(legendWidth, _MIN_PALETTE_HEIGHT);
legendWidth = _GAP + Math.max(legendWidth, headerTextWidth) + _GAP;
legendHeight = _GAP + headerTextVSpace + _MIN_PALETTE_HEIGHT + _LABEL_GAP + textHeight + _GAP;
legendWidth = Math.max(_MIN_LEGEND_WIDTH, adjust(legendWidth, 16));
legendHeight = Math.max(_MIN_LEGEND_HEIGHT, adjust(legendHeight, 16));
} else {
legendWidth = _MIN_PALETTE_HEIGHT + _LABEL_GAP + maxLabelWidth;
legendWidth = _GAP + Math.max(legendWidth, headerTextWidth) + _GAP;
legendHeight =
_GAP
+ headerTextVSpace
+ Math.max(legendHeight, _MIN_PALETTE_WIDTH)
+ _LABEL_GAP
+ textHeight
+ _GAP;
legendWidth = Math.max(_MIN_LEGEND_HEIGHT, adjust(legendWidth, 16));
legendHeight = Math.max(_MIN_LEGEND_WIDTH, adjust(legendHeight, 16));
}
legendSize = new Dimension(legendWidth, legendHeight);
final int headerTextSpace = headerText != null ? textHeight + _GAP : 0;
final int labelTextSpace = _LABEL_GAP + textHeight;
if (orientation == HORIZONTAL) {
paletteRect =
new Rectangle(
_GAP,
_GAP + headerTextSpace,
legendSize.width - (_GAP + _GAP),
legendSize.height - (_GAP + headerTextSpace + labelTextSpace + _GAP));
int paletteGap = Math.max(labelWidths[0], labelWidths[n - 1]) / 2;
palettePos1 = paletteRect.x + paletteGap;
palettePos2 = paletteRect.x + paletteRect.width - paletteGap;
} else {
paletteRect =
new Rectangle(
_GAP,
_GAP + headerTextSpace,
legendSize.width - (_GAP + labelTextSpace + maxLabelWidth + _GAP),
legendSize.height - (_GAP + headerTextSpace + _GAP));
int paletteGap = Math.max(textHeight, _SLIDER_WIDTH) / 2;
palettePos1 = paletteRect.y + paletteGap;
palettePos2 = paletteRect.y + paletteRect.height - paletteGap;
}
sliderShape = createSliderShape();
}
