--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.utils.ui.color;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.graphics.Color;\r
+import org.eclipse.swt.graphics.GC;\r
+import org.eclipse.swt.graphics.Image;\r
+import org.eclipse.swt.widgets.Display;\r
+\r
+/**\r
+ * \r
+ * <p>\r
+ * Color gradient between multiple colors\r
+ * </p>\r
+ * <p>\r
+ * Supports RGB and HSV linear interpolation between colors\r
+ * </p>\r
+ * \r
+ * @author Marko Luukkainen\r
+ *\r
+ */\r
+public class ColorGradient {\r
+ public static final int RGB = 0;\r
+\r
+ public static final int HSV = 1;\r
+\r
+ private ArrayList<ColorValue> values;\r
+\r
+ private int type;\r
+ \r
+ public ColorGradient() {\r
+ this.values = new ArrayList<ColorValue>();\r
+ this.type = RGB;\r
+ }\r
+\r
+ public ColorGradient(ColorGradient copyFrom) {\r
+ this.values = new ArrayList<ColorValue>(copyFrom.values);\r
+ this.type = copyFrom.type;\r
+ }\r
+\r
+ public ColorGradient(Collection<ColorValue> values) {\r
+ this.values = new ArrayList<ColorValue>(values);\r
+ Collections.sort(this.values, new ColorValueComparator());\r
+ this.type = RGB;\r
+ }\r
+\r
+ public ColorGradient(ColorValue array[]) {\r
+ this.values = new ArrayList<ColorValue>();\r
+ for (ColorValue c : array) {\r
+ values.add(c);\r
+ }\r
+ Collections.sort(this.values, new ColorValueComparator());\r
+ this.type = RGB;\r
+ }\r
+\r
+ public ColorGradient(Collection<ColorValue> values, int type) {\r
+ this.values = new ArrayList<ColorValue>(values);\r
+ Collections.sort(this.values, new ColorValueComparator());\r
+ this.type = type;\r
+ }\r
+\r
+ public ColorGradient(ColorValue array[], int type) {\r
+ this.values = new ArrayList<ColorValue>();\r
+ for (ColorValue c : array) {\r
+ values.add(c);\r
+ }\r
+ Collections.sort(this.values, new ColorValueComparator());\r
+ this.type = type;\r
+ }\r
+\r
+ /**\r
+ * Interpolates color in RGB space\r
+ * \r
+ * @param value\r
+ * @return\r
+ */\r
+ private byte[] getRGBColor(double value) {\r
+ int index = 1;\r
+ while (values.get(index).getValue() <= value && index < values.size()-1)\r
+ index++;\r
+\r
+ value -= values.get(index - 1).getValue();\r
+ value /= (values.get(index).getValue() - values.get(index - 1).getValue());\r
+ double valuei = 1.0 - value;\r
+ byte color[] = new byte[] {\r
+ (byte) Math.min(255.0, Math.floor(value * values.get(index).getColor().getR() + valuei * values.get(index - 1).getColor().getR())),\r
+ (byte) Math.min(255.0, Math.floor(value * values.get(index).getColor().getG() + valuei * values.get(index - 1).getColor().getG())),\r
+ (byte) Math.min(255.0, Math.floor(value * values.get(index).getColor().getB() + valuei * values.get(index - 1).getColor().getB())) };\r
+ return color;\r
+\r
+ }\r
+\r
+ /**\r
+ * Interpolates color in HSV space\r
+ * \r
+ * @param value\r
+ * @return\r
+ */\r
+ private byte[] getHSVColor(double value) {\r
+ int index = 1;\r
+ while (values.get(index).getValue() <= value && index < values.size()-1)\r
+ index++;\r
+\r
+ value -= values.get(index - 1).getValue();\r
+ value /= (values.get(index).getValue() - values.get(index - 1).getValue());\r
+ double valuei = 1.0 - value;\r
+ double h;\r
+ if (Float.isNaN(values.get(index).getColor().getH())) {\r
+ h = values.get(index-1).getColor().getH();\r
+ } else if (Float.isNaN(values.get(index-1).getColor().getH())) {\r
+ h = values.get(index).getColor().getH();\r
+ } else {\r
+ // selecting shortest direction between hues\r
+ float angle = values.get(index).getColor().getH() - values.get(index - 1).getColor().getH();\r
+ if (angle > 180.f)\r
+ angle -= 360.f;\r
+ else if (angle < -180.f)\r
+ angle += 360.f;\r
+ h = values.get(index - 1).getColor().getH() + value * angle;\r
+ if (h > 360.f)\r
+ h -= 360.f;\r
+ else if (h < 0.f)\r
+ h+= 360.f;\r
+ }\r
+ 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(),\r
+ value * values.get(index).getColor().getV() + valuei * values.get(index - 1).getColor().getV());\r
+ byte color[] = new byte[] { (byte) interpolated.getR(), (byte) interpolated.getG(), (byte) interpolated.getB() };\r
+\r
+ return color;\r
+\r
+ }\r
+\r
+ /**\r
+ * <p>\r
+ * Returns gradient in array of bytes. Array is RGB order and int contains 3 * requested size of bytes.\r
+ * </p>\r
+ * <p>\r
+ * If gradient contains only one color array is filled with that color\r
+ * </p>\r
+ * <p>\r
+ * if gradient has no colors array is filled with white\r
+ * </p>\r
+ * @param size number of pixels\r
+ * @return gradient in array of bytes\r
+ */\r
+ public byte[] getGradientArray(int size) {\r
+ byte array[] = new byte[size * 3];\r
+ if (values.size() > 1) {\r
+ for (int i = 0; i < size; i++) {\r
+ int index = i * 3;\r
+ double value = values.get(0).getValue() + (values.get(values.size() - 1).getValue() - values.get(0).getValue()) * (double) i / (double) size;\r
+ byte color[];\r
+ if (type == RGB)\r
+ color = getRGBColor(value);\r
+ else\r
+ color = getHSVColor(value);\r
+ array[index] = color[0];\r
+ array[index + 1] = color[1];\r
+ array[index + 2] = color[2];\r
+ }\r
+ } else if (values.size() == 1) {\r
+ byte color[] = new byte[3];\r
+ color[0] = (byte)values.get(0).getColor().getR();\r
+ color[1] = (byte)values.get(0).getColor().getG();\r
+ color[2] = (byte)values.get(0).getColor().getB();\r
+ for (int i = 0; i < size; i++) {\r
+ int index = i * 3;\r
+ array[index] = color[0];\r
+ array[index + 1] = color[1];\r
+ array[index + 2] = color[2];\r
+ }\r
+ } else {\r
+ for (int i = 0; i < size; i++) {\r
+ int index = i * 3;\r
+ array[index] = (byte)255;\r
+ array[index + 1] = (byte)255;\r
+ array[index + 2] = (byte)255;\r
+ }\r
+ }\r
+ return array;\r
+ }\r
+\r
+ /**\r
+ * <p>\r
+ * Returns gradient in image.\r
+ * </p>\r
+ * <p>\r
+ * If gradient contains only one color image is filled with that color\r
+ * </p>\r
+ * <p>\r
+ * if gradient has no colors image is filled with white\r
+ * </p>\r
+ * <p>\r
+ * Style must be set to <code>SWT.HORIZONTAL</code> or <code>SWT.VERTICAL</code>\r
+ * </p>\r
+ * @param size number of pixels\r
+ * @return gradient in array of bytes\r
+ */\r
+ \r
+ public Image getGradientImage(int width, int height, int style) {\r
+ Image image = new Image(Display.getCurrent(), width, height);\r
+ GC gc = new GC(image);\r
+ gc.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));\r
+ gc.fillRectangle(0, 0, width, height);\r
+ if (values.size() > 1) {\r
+ if (SWT.HORIZONTAL == (style | SWT.HORIZONTAL)) {\r
+ for (int x = 0; x < width; x++) {\r
+ double value = values.get(0).getValue() + (values.get(values.size() - 1).getValue() - values.get(0).getValue()) * (double) x\r
+ / (double) (width - 1);\r
+ byte byteColor[];\r
+ if (type == RGB)\r
+ byteColor = getRGBColor(value);\r
+ else\r
+ byteColor = getHSVColor(value);\r
+ Color color = new Color(Display.getCurrent(), byteColor[0] & 0xff, byteColor[1] & 0xff, byteColor[2] & 0xff);\r
+ gc.setForeground(color);\r
+ gc.drawLine(x, 0, x, height);\r
+ color.dispose();\r
+ }\r
+ } else if (SWT.VERTICAL == (style | SWT.VERTICAL)){\r
+ for (int y = 0; y < height; y++) {\r
+ double value = values.get(0).getValue() + (values.get(values.size() - 1).getValue() - values.get(0).getValue()) * (double) y\r
+ / (double) (height - 1);\r
+ byte byteColor[];\r
+ if (type == RGB)\r
+ byteColor = getRGBColor(value);\r
+ else\r
+ byteColor = getHSVColor(value);\r
+ Color color = new Color(Display.getCurrent(), byteColor[0] & 0xff, byteColor[1] & 0xff, byteColor[2] & 0xff);\r
+ gc.setForeground(color);\r
+ gc.drawLine(0, y, width, y);\r
+ color.dispose();\r
+ }\r
+ } else {\r
+ gc.dispose();\r
+ image.dispose();\r
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);\r
+ }\r
+ } else if (values.size() == 1) {\r
+ Color color = new Color(Display.getCurrent(), values.get(0).getColor().getR(), values.get(0).getColor().getG(), values.get(0).getColor().getB()); \r
+ gc.setBackground(color);\r
+ gc.fillRectangle(0, 0, width, height);\r
+ color.dispose();\r
+ } else {\r
+ gc.fillRectangle(0, 0, width, height);\r
+ }\r
+ gc.dispose();\r
+ return image;\r
+ }\r
+ \r
+ public int getType() {\r
+ return type;\r
+ }\r
+ \r
+ public Collection<ColorValue> getColorValues() {\r
+ return values;\r
+ }\r
+ \r
+ public ColorValue[] getColorValueArray() {\r
+ return values.toArray(new ColorValue[values.size()]);\r
+ }\r
+ \r
+ @Deprecated\r
+ public void addCastorColorValue(ColorValue value) {\r
+ values.add(value);\r
+ Collections.sort(this.values, new ColorValueComparator());\r
+ }\r
+ \r
+ @Deprecated\r
+ public void setCastorType(int type) {\r
+ this.type = type;\r
+ }\r
+ \r
+ @Override\r
+ public int hashCode() {\r
+ int hash = 0x58fb3;\r
+ for (ColorValue cv : values)\r
+ hash ^= cv.hashCode();\r
+ return hash;\r
+ }\r
+ \r
+ @Override\r
+ public boolean equals(Object obj) {\r
+ if (!(obj instanceof ColorGradient)) return false;\r
+ ColorGradient cg = (ColorGradient) obj;\r
+ if (cg.type != type) return false;\r
+ if (values.size()!=cg.values.size()) return false;\r
+ if (!values.containsAll(cg.values)) return false;\r
+ return true;\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff