();
+ for (ColorValue c : array) {
+ values.add(c);
+ }
+ Collections.sort(this.values, new ColorValueComparator());
+ this.type = type;
+ }
+
+ /**
+ * Interpolates color in RGB space
+ *
+ * @param value
+ * @return
+ */
+ private byte[] getRGBColor(double value) {
+ int index = 1;
+ while (values.get(index).getValue() <= value && index < values.size()-1)
+ index++;
+
+ value -= values.get(index - 1).getValue();
+ value /= (values.get(index).getValue() - values.get(index - 1).getValue());
+ double valuei = 1.0 - value;
+ byte color[] = new byte[] {
+ (byte) Math.min(255.0, Math.floor(value * values.get(index).getColor().getR() + valuei * values.get(index - 1).getColor().getR())),
+ (byte) Math.min(255.0, Math.floor(value * values.get(index).getColor().getG() + valuei * values.get(index - 1).getColor().getG())),
+ (byte) Math.min(255.0, Math.floor(value * values.get(index).getColor().getB() + valuei * values.get(index - 1).getColor().getB())) };
+ return color;
+
+ }
+
+ /**
+ * Interpolates color in HSV space
+ *
+ * @param value
+ * @return
+ */
+ private byte[] getHSVColor(double value) {
+ int index = 1;
+ while (values.get(index).getValue() <= value && index < values.size()-1)
+ index++;
+
+ value -= values.get(index - 1).getValue();
+ value /= (values.get(index).getValue() - values.get(index - 1).getValue());
+ double valuei = 1.0 - value;
+ double h;
+ if (Float.isNaN(values.get(index).getColor().getH())) {
+ h = values.get(index-1).getColor().getH();
+ } else if (Float.isNaN(values.get(index-1).getColor().getH())) {
+ h = values.get(index).getColor().getH();
+ } else {
+ // selecting shortest direction between hues
+ float angle = values.get(index).getColor().getH() - values.get(index - 1).getColor().getH();
+ if (angle > 180.f)
+ angle -= 360.f;
+ else if (angle < -180.f)
+ angle += 360.f;
+ h = values.get(index - 1).getColor().getH() + value * angle;
+ if (h > 360.f)
+ h -= 360.f;
+ else if (h < 0.f)
+ h+= 360.f;
+ }
+ org.simantics.utils.ui.color.Color interpolated = new org.simantics.utils.ui.color.Color(h, value * values.get(index).getColor().getS() + valuei * values.get(index - 1).getColor().getS(),
+ value * values.get(index).getColor().getV() + valuei * values.get(index - 1).getColor().getV());
+ byte color[] = new byte[] { (byte) interpolated.getR(), (byte) interpolated.getG(), (byte) interpolated.getB() };
+
+ return color;
+
+ }
+
+ /**
+ *
+ * Returns gradient in array of bytes. Array is RGB order and int contains 3 * requested size of bytes.
+ *
+ *
+ * If gradient contains only one color array is filled with that color
+ *
+ *
+ * if gradient has no colors array is filled with white
+ *
+ * @param size number of pixels
+ * @return gradient in array of bytes
+ */
+ public byte[] getGradientArray(int size) {
+ byte array[] = new byte[size * 3];
+ if (values.size() > 1) {
+ for (int i = 0; i < size; i++) {
+ int index = i * 3;
+ double value = values.get(0).getValue() + (values.get(values.size() - 1).getValue() - values.get(0).getValue()) * (double) i / (double) size;
+ byte color[];
+ if (type == RGB)
+ color = getRGBColor(value);
+ else
+ color = getHSVColor(value);
+ array[index] = color[0];
+ array[index + 1] = color[1];
+ array[index + 2] = color[2];
+ }
+ } else if (values.size() == 1) {
+ byte color[] = new byte[3];
+ color[0] = (byte)values.get(0).getColor().getR();
+ color[1] = (byte)values.get(0).getColor().getG();
+ color[2] = (byte)values.get(0).getColor().getB();
+ for (int i = 0; i < size; i++) {
+ int index = i * 3;
+ array[index] = color[0];
+ array[index + 1] = color[1];
+ array[index + 2] = color[2];
+ }
+ } else {
+ for (int i = 0; i < size; i++) {
+ int index = i * 3;
+ array[index] = (byte)255;
+ array[index + 1] = (byte)255;
+ array[index + 2] = (byte)255;
+ }
+ }
+ return array;
+ }
+
+ /**
+ *
+ * Returns gradient in image.
+ *
+ *
+ * If gradient contains only one color image is filled with that color
+ *
+ *
+ * if gradient has no colors image is filled with white
+ *
+ *
+ * Style must be set to SWT.HORIZONTAL or SWT.VERTICAL
+ *
+ * @param size number of pixels
+ * @return gradient in array of bytes
+ */
+
+ public Image getGradientImage(int width, int height, int style) {
+ Image image = new Image(Display.getCurrent(), width, height);
+ GC gc = new GC(image);
+ gc.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
+ gc.fillRectangle(0, 0, width, height);
+ if (values.size() > 1) {
+ if (SWT.HORIZONTAL == (style | SWT.HORIZONTAL)) {
+ for (int x = 0; x < width; x++) {
+ double value = values.get(0).getValue() + (values.get(values.size() - 1).getValue() - values.get(0).getValue()) * (double) x
+ / (double) (width - 1);
+ byte byteColor[];
+ if (type == RGB)
+ byteColor = getRGBColor(value);
+ else
+ byteColor = getHSVColor(value);
+ Color color = new Color(Display.getCurrent(), byteColor[0] & 0xff, byteColor[1] & 0xff, byteColor[2] & 0xff);
+ gc.setForeground(color);
+ gc.drawLine(x, 0, x, height);
+ color.dispose();
+ }
+ } else if (SWT.VERTICAL == (style | SWT.VERTICAL)){
+ for (int y = 0; y < height; y++) {
+ double value = values.get(0).getValue() + (values.get(values.size() - 1).getValue() - values.get(0).getValue()) * (double) y
+ / (double) (height - 1);
+ byte byteColor[];
+ if (type == RGB)
+ byteColor = getRGBColor(value);
+ else
+ byteColor = getHSVColor(value);
+ Color color = new Color(Display.getCurrent(), byteColor[0] & 0xff, byteColor[1] & 0xff, byteColor[2] & 0xff);
+ gc.setForeground(color);
+ gc.drawLine(0, y, width, y);
+ color.dispose();
+ }
+ } else {
+ gc.dispose();
+ image.dispose();
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ } else if (values.size() == 1) {
+ Color color = new Color(Display.getCurrent(), values.get(0).getColor().getR(), values.get(0).getColor().getG(), values.get(0).getColor().getB());
+ gc.setBackground(color);
+ gc.fillRectangle(0, 0, width, height);
+ color.dispose();
+ } else {
+ gc.fillRectangle(0, 0, width, height);
+ }
+ gc.dispose();
+ return image;
+ }
+
+ public int getType() {
+ return type;
+ }
+
+ public Collection getColorValues() {
+ return values;
+ }
+
+ public ColorValue[] getColorValueArray() {
+ return values.toArray(new ColorValue[values.size()]);
+ }
+
+ @Deprecated
+ public void addCastorColorValue(ColorValue value) {
+ values.add(value);
+ Collections.sort(this.values, new ColorValueComparator());
+ }
+
+ @Deprecated
+ public void setCastorType(int type) {
+ this.type = type;
+ }
+
+ @Override
+ public int hashCode() {
+ int hash = 0x58fb3;
+ for (ColorValue cv : values)
+ hash ^= cv.hashCode();
+ return hash;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (!(obj instanceof ColorGradient)) return false;
+ ColorGradient cg = (ColorGradient) obj;
+ if (cg.type != type) return false;
+ if (values.size()!=cg.values.size()) return false;
+ if (!values.containsAll(cg.values)) return false;
+ return true;
+ }
+
+}