+ };
+
+/**
+ * @class Roo.lib.Color
+ * @constructor
+ * An abstract Color implementation. Concrete Color implementations should use
+ * an instance of this function as their prototype, and implement the getRGB and
+ * getHSL functions. getRGB should return an object representing the RGB
+ * components of this Color, with the red, green, and blue components in the
+ * range [0,255] and the alpha component in the range [0,100]. getHSL should
+ * return an object representing the HSL components of this Color, with the hue
+ * component in the range [0,360), the saturation and lightness components in
+ * the range [0,100], and the alpha component in the range [0,1].
+ *
+ *
+ * Color.js
+ *
+ * Functions for Color handling and processing.
+ *
+ * http://www.safalra.com/web-design/javascript/Color-handling-and-processing/
+ *
+ * The author of this program, Safalra (Stephen Morley), irrevocably releases all
+ * rights to this program, with the intention of it becoming part of the public
+ * domain. Because this program is released into the public domain, it comes with
+ * no warranty either expressed or implied, to the extent permitted by law.
+ *
+ * For more free and public domain JavaScript code by the same author, visit:
+ * http://www.safalra.com/web-design/javascript/
+ *
+ */
+Roo.lib.Color = function() { }
+
+
+Roo.apply(Roo.lib.Color.prototype, {
+
+ rgb : null,
+ hsv : null,
+ hsl : null,
+
+ /**
+ * getIntegerRGB
+ * @return {Object} an object representing the RGBA components of this Color. The red,
+ * green, and blue components are converted to integers in the range [0,255].
+ * The alpha is a value in the range [0,1].
+ */
+ getIntegerRGB : function(){
+
+ // get the RGB components of this Color
+ var rgb = this.getRGB();
+
+ // return the integer components
+ return {
+ 'r' : Math.round(rgb.r),
+ 'g' : Math.round(rgb.g),
+ 'b' : Math.round(rgb.b),
+ 'a' : rgb.a
+ };
+
+ },
+
+ /**
+ * getPercentageRGB
+ * @return {Object} an object representing the RGBA components of this Color. The red,
+ * green, and blue components are converted to numbers in the range [0,100].
+ * The alpha is a value in the range [0,1].
+ */
+ getPercentageRGB : function(){
+
+ // get the RGB components of this Color
+ var rgb = this.getRGB();
+
+ // return the percentage components
+ return {
+ 'r' : 100 * rgb.r / 255,
+ 'g' : 100 * rgb.g / 255,
+ 'b' : 100 * rgb.b / 255,
+ 'a' : rgb.a
+ };
+
+ },
+
+ /**
+ * getCSSHexadecimalRGB
+ * @return {String} a string representing this Color as a CSS hexadecimal RGB Color
+ * value - that is, a string of the form #RRGGBB where each of RR, GG, and BB
+ * are two-digit hexadecimal numbers.
+ */
+ getCSSHexadecimalRGB : function()
+ {
+
+ // get the integer RGB components
+ var rgb = this.getIntegerRGB();
+
+ // determine the hexadecimal equivalents
+ var r16 = rgb.r.toString(16);
+ var g16 = rgb.g.toString(16);
+ var b16 = rgb.b.toString(16);
+
+ // return the CSS RGB Color value
+ return '#'
+ + (r16.length == 2 ? r16 : '0' + r16)
+ + (g16.length == 2 ? g16 : '0' + g16)
+ + (b16.length == 2 ? b16 : '0' + b16);
+
+ },
+
+ /**
+ * getCSSIntegerRGB
+ * @return {String} a string representing this Color as a CSS integer RGB Color
+ * value - that is, a string of the form rgb(r,g,b) where each of r, g, and b
+ * are integers in the range [0,255].
+ */
+ getCSSIntegerRGB : function(){
+
+ // get the integer RGB components
+ var rgb = this.getIntegerRGB();
+
+ // return the CSS RGB Color value
+ return 'rgb(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ')';
+
+ },
+
+ /**
+ * getCSSIntegerRGBA
+ * @return {String} Returns a string representing this Color as a CSS integer RGBA Color
+ * value - that is, a string of the form rgba(r,g,b,a) where each of r, g, and
+ * b are integers in the range [0,255] and a is in the range [0,1].
+ */
+ getCSSIntegerRGBA : function(){
+
+ // get the integer RGB components
+ var rgb = this.getIntegerRGB();
+
+ // return the CSS integer RGBA Color value
+ return 'rgb(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + rgb.a + ')';
+
+ },
+
+ /**
+ * getCSSPercentageRGB
+ * @return {String} a string representing this Color as a CSS percentage RGB Color
+ * value - that is, a string of the form rgb(r%,g%,b%) where each of r, g, and
+ * b are in the range [0,100].
+ */
+ getCSSPercentageRGB : function(){
+
+ // get the percentage RGB components
+ var rgb = this.getPercentageRGB();
+
+ // return the CSS RGB Color value
+ return 'rgb(' + rgb.r + '%,' + rgb.g + '%,' + rgb.b + '%)';
+
+ },
+
+ /**
+ * getCSSPercentageRGBA
+ * @return {String} a string representing this Color as a CSS percentage RGBA Color
+ * value - that is, a string of the form rgba(r%,g%,b%,a) where each of r, g,
+ * and b are in the range [0,100] and a is in the range [0,1].
+ */
+ getCSSPercentageRGBA : function(){
+
+ // get the percentage RGB components
+ var rgb = this.getPercentageRGB();
+
+ // return the CSS percentage RGBA Color value
+ return 'rgb(' + rgb.r + '%,' + rgb.g + '%,' + rgb.b + '%,' + rgb.a + ')';
+
+ },
+
+ /**
+ * getCSSHSL
+ * @return {String} a string representing this Color as a CSS HSL Color value - that
+ * is, a string of the form hsl(h,s%,l%) where h is in the range [0,100] and
+ * s and l are in the range [0,100].
+ */
+ getCSSHSL : function(){
+
+ // get the HSL components
+ var hsl = this.getHSL();
+
+ // return the CSS HSL Color value
+ return 'hsl(' + hsl.h + ',' + hsl.s + '%,' + hsl.l + '%)';
+
+ },
+
+ /**
+ * getCSSHSLA
+ * @return {String} a string representing this Color as a CSS HSLA Color value - that
+ * is, a string of the form hsla(h,s%,l%,a) where h is in the range [0,100],
+ * s and l are in the range [0,100], and a is in the range [0,1].
+ */
+ getCSSHSLA : function(){
+
+ // get the HSL components
+ var hsl = this.getHSL();
+
+ // return the CSS HSL Color value
+ return 'hsl(' + hsl.h + ',' + hsl.s + '%,' + hsl.l + '%,' + hsl.a + ')';
+
+ },
+
+ /**
+ * Sets the Color of the specified node to this Color. This functions sets
+ * the CSS 'color' property for the node. The parameter is:
+ *
+ * @param {DomElement} node - the node whose Color should be set
+ */
+ setNodeColor : function(node){
+
+ // set the Color of the node
+ node.style.color = this.getCSSHexadecimalRGB();
+
+ },
+
+ /**
+ * Sets the background Color of the specified node to this Color. This
+ * functions sets the CSS 'background-color' property for the node. The
+ * parameter is:
+ *
+ * @param {DomElement} node - the node whose background Color should be set
+ */
+ setNodeBackgroundColor : function(node){
+
+ // set the background Color of the node
+ node.style.backgroundColor = this.getCSSHexadecimalRGB();
+
+ },
+ // convert between formats..
+ toRGB: function()
+ {
+ var r = this.getIntegerRGB();
+ return new Roo.lib.RGBColor(r.r,r.g,r.b,r.a);
+
+ },
+ toHSL : function()
+ {
+ var hsl = this.getHSL();
+ // return the CSS HSL Color value
+ return new Roo.lib.HSLColor(hsl.h, hsl.s, hsl.l , hsl.a );
+
+ },
+
+ toHSV : function()
+ {
+ var rgb = this.toRGB();
+ var hsv = rgb.getHSV();
+ // return the CSS HSL Color value
+ return new Roo.lib.HSVColor(hsv.h, hsv.s, hsv.v , hsv.a );
+
+ },
+
+ // modify v = 0 ... 1 (eg. 0.5)
+ saturate : function(v)
+ {
+ var rgb = this.toRGB();
+ var hsv = rgb.getHSV();
+ return new Roo.lib.HSVColor(hsv.h, hsv.s * v, hsv.v , hsv.a );
+
+
+ },
+
+
+ /**
+ * getRGB
+ * @return {Object} the RGB and alpha components of this Color as an object with r,
+ * g, b, and a properties. r, g, and b are in the range [0,255] and a is in
+ * the range [0,1].
+ */
+ getRGB: function(){
+
+ // return the RGB components
+ return {
+ 'r' : this.rgb.r,
+ 'g' : this.rgb.g,
+ 'b' : this.rgb.b,
+ 'a' : this.alpha
+ };
+
+ },
+
+ /**
+ * getHSV
+ * @return {Object} the HSV and alpha components of this Color as an object with h,
+ * s, v, and a properties. h is in the range [0,360), s and v are in the range
+ * [0,100], and a is in the range [0,1].
+ */
+ getHSV : function()
+ {
+
+ // calculate the HSV components if necessary
+ if (this.hsv == null) {
+ this.calculateHSV();
+ }
+
+ // return the HSV components
+ return {
+ 'h' : this.hsv.h,
+ 's' : this.hsv.s,
+ 'v' : this.hsv.v,
+ 'a' : this.alpha
+ };
+
+ },
+
+ /**
+ * getHSL
+ * @return {Object} the HSL and alpha components of this Color as an object with h,
+ * s, l, and a properties. h is in the range [0,360), s and l are in the range
+ * [0,100], and a is in the range [0,1].
+ */
+ getHSL : function(){
+
+
+ // calculate the HSV components if necessary
+ if (this.hsl == null) { this.calculateHSL(); }
+
+ // return the HSL components
+ return {
+ 'h' : this.hsl.h,
+ 's' : this.hsl.s,
+ 'l' : this.hsl.l,
+ 'a' : this.alpha
+ };
+
+ }
+
+
+});
+
+
+/**
+ * @class Roo.lib.RGBColor
+ * @extends Roo.lib.Color
+ * Creates a Color specified in the RGB Color space, with an optional alpha
+ * component. The parameters are:
+ * @constructor
+ *
+
+ * @param {Number} r - the red component, clipped to the range [0,255]
+ * @param {Number} g - the green component, clipped to the range [0,255]
+ * @param {Number} b - the blue component, clipped to the range [0,255]
+ * @param {Number} a - the alpha component, clipped to the range [0,1] - this parameter is
+ * optional and defaults to 1
+ */
+Roo.lib.RGBColor = function (r, g, b, a){
+
+ // store the alpha component after clipping it if necessary
+ this.alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
+
+ // store the RGB components after clipping them if necessary
+ this.rgb =
+ {
+ 'r' : Math.max(0, Math.min(255, r)),
+ 'g' : Math.max(0, Math.min(255, g)),
+ 'b' : Math.max(0, Math.min(255, b))
+ };
+
+ // initialise the HSV and HSL components to null
+
+
+ /*
+ * //private returns the HSV or HSL hue component of this RGBColor. The hue is in the
+ * range [0,360). The parameters are:
+ *
+ * maximum - the maximum of the RGB component values
+ * range - the range of the RGB component values
+ */
+
+
+}
+// this does an 'exteds'
+Roo.extend(Roo.lib.RGBColor, Roo.lib.Color, {
+
+
+ getHue : function(maximum, range)
+ {
+ var rgb = this.rgb;
+
+ // check whether the range is zero
+ if (range == 0){
+
+ // set the hue to zero (any hue is acceptable as the Color is grey)
+ var hue = 0;
+
+ }else{
+
+ // determine which of the components has the highest value and set the hue
+ switch (maximum){
+
+ // red has the highest value
+ case rgb.r:
+ var hue = (rgb.g - rgb.b) / range * 60;
+ if (hue < 0) { hue += 360; }
+ break;
+
+ // green has the highest value
+ case rgb.g:
+ var hue = (rgb.b - rgb.r) / range * 60 + 120;
+ break;
+
+ // blue has the highest value
+ case rgb.b:
+ var hue = (rgb.r - rgb.g) / range * 60 + 240;
+ break;
+
+ }
+
+ }
+
+ // return the hue
+ return hue;
+
+ },
+
+ /* //private Calculates and stores the HSV components of this RGBColor so that they can
+ * be returned be the getHSV function.
+ */
+ calculateHSV : function(){
+ var rgb = this.rgb;
+ // get the maximum and range of the RGB component values
+ var maximum = Math.max(rgb.r, rgb.g, rgb.b);
+ var range = maximum - Math.min(rgb.r, rgb.g, rgb.b);
+
+ // store the HSV components
+ this.hsv =
+ {
+ 'h' : this.getHue(maximum, range),
+ 's' : (maximum == 0 ? 0 : 100 * range / maximum),
+ 'v' : maximum / 2.55
+ };
+
+ },
+
+ /* //private Calculates and stores the HSL components of this RGBColor so that they can
+ * be returned be the getHSL function.
+ */
+ calculateHSL : function(){
+ var rgb = this.rgb;
+ // get the maximum and range of the RGB component values
+ var maximum = Math.max(rgb.r, rgb.g, rgb.b);
+ var range = maximum - Math.min(rgb.r, rgb.g, rgb.b);
+
+ // determine the lightness in the range [0,1]
+ var l = maximum / 255 - range / 510;
+
+ // store the HSL components
+ this.hsl =
+ {
+ 'h' : this.getHue(maximum, range),
+ 's' : (range == 0 ? 0 : range / 2.55 / (l < 0.5 ? l * 2 : 2 - l * 2)),
+ 'l' : 100 * l
+ };
+
+ }
+
+});
+
+/**
+ * @class Roo.lib.HSVColor
+ * @extends Roo.lib.Color
+ * Creates a Color specified in the HSV Color space, with an optional alpha
+ * component. The parameters are:
+ * @constructor
+ *
+ * @param {Number} h - the hue component, wrapped to the range [0,360)
+ * @param {Number} s - the saturation component, clipped to the range [0,100]
+ * @param {Number} v - the value component, clipped to the range [0,100]
+ * @param {Number} a - the alpha component, clipped to the range [0,1] - this parameter is
+ * optional and defaults to 1
+ */
+Roo.lib.HSVColor = function (h, s, v, a){
+
+ // store the alpha component after clipping it if necessary
+ this.alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
+
+ // store the HSV components after clipping or wrapping them if necessary
+ this.hsv =
+ {
+ 'h' : (h % 360 + 360) % 360,
+ 's' : Math.max(0, Math.min(100, s)),
+ 'v' : Math.max(0, Math.min(100, v))
+ };
+
+ // initialise the RGB and HSL components to null
+ this.rgb = null;
+ this.hsl = null;
+}
+
+Roo.extend(Roo.lib.HSVColor, Roo.lib.Color, {
+ /* Calculates and stores the RGB components of this HSVColor so that they can
+ * be returned be the getRGB function.
+ */
+ calculateRGB: function ()
+ {
+ var hsv = this.hsv;
+ // check whether the saturation is zero
+ if (hsv.s == 0){
+
+ // set the Color to the appropriate shade of grey
+ var r = hsv.v;
+ var g = hsv.v;
+ var b = hsv.v;
+
+ }else{
+
+ // set some temporary values
+ var f = hsv.h / 60 - Math.floor(hsv.h / 60);
+ var p = hsv.v * (1 - hsv.s / 100);
+ var q = hsv.v * (1 - hsv.s / 100 * f);
+ var t = hsv.v * (1 - hsv.s / 100 * (1 - f));
+
+ // set the RGB Color components to their temporary values
+ switch (Math.floor(hsv.h / 60)){
+ case 0: var r = hsv.v; var g = t; var b = p; break;
+ case 1: var r = q; var g = hsv.v; var b = p; break;
+ case 2: var r = p; var g = hsv.v; var b = t; break;
+ case 3: var r = p; var g = q; var b = hsv.v; break;
+ case 4: var r = t; var g = p; var b = hsv.v; break;
+ case 5: var r = hsv.v; var g = p; var b = q; break;
+ }
+
+ }
+
+ // store the RGB components
+ this.rgb =
+ {
+ 'r' : r * 2.55,
+ 'g' : g * 2.55,
+ 'b' : b * 2.55
+ };
+
+ },
+
+ /* Calculates and stores the HSL components of this HSVColor so that they can
+ * be returned be the getHSL function.
+ */
+ calculateHSL : function (){
+
+ var hsv = this.hsv;
+ // determine the lightness in the range [0,100]
+ var l = (2 - hsv.s / 100) * hsv.v / 2;
+
+ // store the HSL components
+ this.hsl =
+ {
+ 'h' : hsv.h,
+ 's' : hsv.s * hsv.v / (l < 50 ? l * 2 : 200 - l * 2),
+ 'l' : l
+ };
+
+ // correct a division-by-zero error
+ if (isNaN(hsl.s)) { hsl.s = 0; }
+
+ }
+
+
+});
+
+
+/**
+ * @class Roo.lib.HSLColor
+ * @extends Roo.lib.Color
+ *
+ * @constructor
+ * Creates a Color specified in the HSL Color space, with an optional alpha
+ * component. The parameters are:
+ *
+ * @param {Number} h - the hue component, wrapped to the range [0,360)
+ * @param {Number} s - the saturation component, clipped to the range [0,100]
+ * @param {Number} l - the lightness component, clipped to the range [0,100]
+ * @param {Number} a - the alpha component, clipped to the range [0,1] - this parameter is
+ * optional and defaults to 1
+ */
+
+Roo.lib.HSLColor = function(h, s, l, a){
+
+ // store the alpha component after clipping it if necessary
+ this.alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
+
+ // store the HSL components after clipping or wrapping them if necessary
+ this.hsl =
+ {
+ 'h' : (h % 360 + 360) % 360,
+ 's' : Math.max(0, Math.min(100, s)),
+ 'l' : Math.max(0, Math.min(100, l))
+ };
+
+ // initialise the RGB and HSV components to null
+}
+
+Roo.extend(Roo.lib.HSLColor, Roo.lib.Color, {
+
+ /* Calculates and stores the RGB components of this HSLColor so that they can
+ * be returned be the getRGB function.
+ */
+ calculateRGB: function (){
+
+ // check whether the saturation is zero
+ if (this.hsl.s == 0){
+
+ // store the RGB components representing the appropriate shade of grey
+ this.rgb =
+ {
+ 'r' : this.hsl.l * 2.55,
+ 'g' : this.hsl.l * 2.55,
+ 'b' : this.hsl.l * 2.55
+ };
+
+ }else{
+
+ // set some temporary values
+ var p = this.hsl.l < 50
+ ? this.hsl.l * (1 + hsl.s / 100)
+ : this.hsl.l + hsl.s - hsl.l * hsl.s / 100;
+ var q = 2 * hsl.l - p;
+
+ // initialise the RGB components
+ this.rgb =
+ {
+ 'r' : (h + 120) / 60 % 6,
+ 'g' : h / 60,
+ 'b' : (h + 240) / 60 % 6
+ };
+
+ // loop over the RGB components
+ for (var key in this.rgb){
+
+ // ensure that the property is not inherited from the root object
+ if (this.rgb.hasOwnProperty(key)){
+
+ // set the component to its value in the range [0,100]
+ if (this.rgb[key] < 1){
+ this.rgb[key] = q + (p - q) * this.rgb[key];
+ }else if (this.rgb[key] < 3){
+ this.rgb[key] = p;
+ }else if (this.rgb[key] < 4){
+ this.rgb[key] = q + (p - q) * (4 - this.rgb[key]);
+ }else{
+ this.rgb[key] = q;
+ }
+
+ // set the component to its value in the range [0,255]
+ this.rgb[key] *= 2.55;
+
+ }
+
+ }
+
+ }
+
+ },
+
+ /* Calculates and stores the HSV components of this HSLColor so that they can
+ * be returned be the getHSL function.
+ */
+ calculateHSV : function(){
+
+ // set a temporary value
+ var t = this.hsl.s * (this.hsl.l < 50 ? this.hsl.l : 100 - this.hsl.l) / 100;
+
+ // store the HSV components
+ this.hsv =
+ {
+ 'h' : this.hsl.h,
+ 's' : 200 * t / (this.hsl.l + t),
+ 'v' : t + this.hsl.l
+ };
+
+ // correct a division-by-zero error
+ if (isNaN(this.hsv.s)) { this.hsv.s = 0; }
+
+ }
+
+
+});
+/*