-/*
+
-Colour.js
-
-Functions for colour handling and processing.
-
-http://www.safalra.com/web-design/javascript/colour-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/
-
-*/
-
-
-/* An abstract Colour implementation. Concrete Colour implementations should use
+/**
+ * @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 Colour, with the red, green, and blue components in the
+ * 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 Colour, with the hue
+ * 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.Colour = function(){
+Roo.lib.Color = function() { }
+
- /* Returns an object representing the RGBA components of this Colour. The red,
+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].
*/
- this.getIntegerRGB = function(){
+ getIntegerRGB : function(){
- // get the RGB components of this colour
+ // get the RGB components of this Color
var rgb = this.getRGB();
// return the integer components
'a' : rgb.a
};
- };
+ },
- /* Returns an object representing the RGBA components of this Colour. The red,
+ /**
+ * 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].
*/
- this.getPercentageRGB = function(){
+ getPercentageRGB : function(){
- // get the RGB components of this colour
+ // get the RGB components of this Color
var rgb = this.getRGB();
// return the percentage components
'a' : rgb.a
};
- };
+ },
- /* Returns a string representing this Colour as a CSS hexadecimal RGB colour
+ /**
+ * 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.
*/
- this.getCSSHexadecimalRGB = function(){
+ getCSSHexadecimalRGB : function()
+ {
// get the integer RGB components
var rgb = this.getIntegerRGB();
var g16 = rgb.g.toString(16);
var b16 = rgb.b.toString(16);
- // return the CSS RGB colour value
+ // 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);
- };
+ },
- /* Returns a string representing this Colour as a CSS integer RGB colour
+ /**
+ * 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].
*/
- this.getCSSIntegerRGB = function(){
+ getCSSIntegerRGB : function(){
// get the integer RGB components
var rgb = this.getIntegerRGB();
- // return the CSS RGB colour value
+ // return the CSS RGB Color value
return 'rgb(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ')';
- };
+ },
- /* Returns a string representing this Colour as a CSS integer RGBA colour
+ /**
+ * 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].
*/
- this.getCSSIntegerRGBA = function(){
+ getCSSIntegerRGBA : function(){
// get the integer RGB components
var rgb = this.getIntegerRGB();
- // return the CSS integer RGBA colour value
+ // return the CSS integer RGBA Color value
return 'rgb(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + rgb.a + ')';
- };
+ },
- /* Returns a string representing this Colour as a CSS percentage RGB colour
+ /**
+ * 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].
*/
- this.getCSSPercentageRGB = function(){
+ getCSSPercentageRGB : function(){
// get the percentage RGB components
var rgb = this.getPercentageRGB();
- // return the CSS RGB colour value
+ // return the CSS RGB Color value
return 'rgb(' + rgb.r + '%,' + rgb.g + '%,' + rgb.b + '%)';
- };
+ },
- /* Returns a string representing this Colour as a CSS percentage RGBA colour
+ /**
+ * 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].
*/
- this.getCSSPercentageRGBA = function(){
+ getCSSPercentageRGBA : function(){
// get the percentage RGB components
var rgb = this.getPercentageRGB();
- // return the CSS percentage RGBA colour value
+ // return the CSS percentage RGBA Color value
return 'rgb(' + rgb.r + '%,' + rgb.g + '%,' + rgb.b + '%,' + rgb.a + ')';
- };
+ },
- /* Returns a string representing this Colour as a CSS HSL colour value - that
+ /**
+ * 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].
*/
- this.getCSSHSL = function(){
+ getCSSHSL : function(){
// get the HSL components
var hsl = this.getHSL();
- // return the CSS HSL colour value
+ // return the CSS HSL Color value
return 'hsl(' + hsl.h + ',' + hsl.s + '%,' + hsl.l + '%)';
- };
+ },
- /* Returns a string representing this Colour as a CSS HSLA colour value - that
+ /**
+ * 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].
*/
- this.getCSSHSLA = function(){
+ getCSSHSLA : function(){
// get the HSL components
var hsl = this.getHSL();
- // return the CSS HSL colour value
+ // return the CSS HSL Color value
return 'hsl(' + hsl.h + ',' + hsl.s + '%,' + hsl.l + '%,' + hsl.a + ')';
- };
+ },
- /* Sets the colour of the specified node to this Colour. This functions sets
+ /**
+ * Sets the Color of the specified node to this Color. This functions sets
* the CSS 'color' property for the node. The parameter is:
- *
- * node - the node whose colour should be set
+ *
+ * @param {DomElement} node - the node whose Color should be set
*/
- this.setNodeColour = function(node){
+ setNodeColor : function(node){
- // set the colour of the node
+ // set the Color of the node
node.style.color = this.getCSSHexadecimalRGB();
- };
+ },
- /* Sets the background colour of the specified node to this Colour. This
+ /**
+ * 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:
*
- * node - the node whose background colour should be set
+ * @param {DomElement} node - the node whose background Color should be set
*/
- this.setNodeBackgroundColour = function(node){
+ setNodeBackgroundColor : function(node){
- // set the background colour of the node
+ // set the background Color of the node
node.style.backgroundColor = this.getCSSHexadecimalRGB();
- };
+ },
// convert between formats..
- this.toRGB= function()
+ toRGB: function()
{
var r = this.getIntegerRGB();
- return new Roo.lib.RGBColour(r.r,r.g,r.b,r.a);
+ return new Roo.lib.RGBColor(r.r,r.g,r.b,r.a);
- }
- this.toHSL = function()
+ },
+ toHSL : function()
{
var hsl = this.getHSL();
- // return the CSS HSL colour value
- return new Roo.lib.HSLColour(hsl.h, hsl.s, hsl.l , hsl.a );
+ // return the CSS HSL Color value
+ return new Roo.lib.HSLColor(hsl.h, hsl.s, hsl.l , hsl.a );
- }
+ },
- this.toHSV = function()
+ toHSV : function()
{
var rgb = this.toRGB();
var hsv = rgb.getHSV();
- // return the CSS HSL colour value
- return new Roo.lib.HSVColour(hsv.h, hsv.s, hsv.v , hsv.a );
+ // 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)
- this.saturate = function(v)
- {
- var rgb = this.toRGB();
- var hsv = rgb.getHSV();
- return new Roo.lib.HSVColour(hsv.h, hsv.s * v, hsv.v , hsv.a );
-
-
- }
+ 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
+ };
+
+ }
-}
+});
-/* Creates a colour specified in the RGB colour space, with an optional 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:
- *
- * r - the red component, clipped to the range [0,255]
- * g - the green component, clipped to the range [0,255]
- * b - the blue component, clipped to the range [0,255]
- * a - the alpha component, clipped to the range [0,1] - this parameter is
+ * @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.RGBColour = function (r, g, b, a){
+Roo.lib.RGBColor = function (r, g, b, a){
// store the alpha component after clipping it if necessary
- var alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
+ this.alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
// store the RGB components after clipping them if necessary
- var rgb =
+ this.rgb =
{
'r' : Math.max(0, Math.min(255, r)),
'g' : Math.max(0, Math.min(255, g)),
};
// initialise the HSV and HSL components to null
- var hsv = null;
- var hsl = null;
+
- /* Returns the HSV or HSL hue component of this RGBColour. The hue is in the
+ /*
+ * //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
*/
- function getHue(maximum, range){
-
- // check whether the range is zero
- if (range == 0){
-
- // set the hue to zero (any hue is acceptable as the colour 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;
+}
+// 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;
+
+ },
- }
-
- // return the hue
- return hue;
-
- }
-
- /* Calculates and stores the HSV components of this RGBColour so that they can
+ /* //private Calculates and stores the HSV components of this RGBColor so that they can
* be returned be the getHSV function.
*/
- function calculateHSV(){
-
+ 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
- hsv =
+ this.hsv =
{
- 'h' : getHue(maximum, range),
+ 'h' : this.getHue(maximum, range),
's' : (maximum == 0 ? 0 : 100 * range / maximum),
'v' : maximum / 2.55
};
- }
+ },
- /* Calculates and stores the HSL components of this RGBColour so that they can
+ /* //private Calculates and stores the HSL components of this RGBColor so that they can
* be returned be the getHSL function.
*/
- function calculateHSL(){
-
+ 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);
var l = maximum / 255 - range / 510;
// store the HSL components
- hsl =
+ this.hsl =
{
- 'h' : getHue(maximum, range),
+ 'h' : this.getHue(maximum, range),
's' : (range == 0 ? 0 : range / 2.55 / (l < 0.5 ? l * 2 : 2 - l * 2)),
'l' : 100 * l
};
}
- /* Returns the RGB and alpha components of this RGBColour 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].
- */
- this.getRGB = function(){
-
- // return the RGB components
- return {
- 'r' : rgb.r,
- 'g' : rgb.g,
- 'b' : rgb.b,
- 'a' : alpha
- };
+});
- };
-
- /* Returns the HSV and alpha components of this RGBColour 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].
- */
- this.getHSV = function(){
-
- // calculate the HSV components if necessary
- if (hsv == null) calculateHSV();
-
- // return the HSV components
- return {
- 'h' : hsv.h,
- 's' : hsv.s,
- 'v' : hsv.v,
- 'a' : alpha
- };
-
- };
-
- /* Returns the HSL and alpha components of this RGBColour 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].
- */
- this.getHSL = function(){
-
- // calculate the HSV components if necessary
- if (hsl == null) calculateHSL();
-
- // return the HSL components
- return {
- 'h' : hsl.h,
- 's' : hsl.s,
- 'l' : hsl.l,
- 'a' : alpha
- };
-
- };
-
-}
-Roo.lib.RGBColour.prototype = new Roo.lib.Colour();
-
-
-/* Creates a colour specified in the HSV colour space, with an optional alpha
+/**
+ * @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
*
- * h - the hue component, wrapped to the range [0,360)
- * s - the saturation component, clipped to the range [0,100]
- * v - the value component, clipped to the range [0,100]
- * a - the alpha component, clipped to the range [0,1] - this parameter is
+ * @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.HSVColour = function (h, s, v, a){
+Roo.lib.HSVColor = function (h, s, v, a){
// store the alpha component after clipping it if necessary
- var alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
+ this.alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
// store the HSV components after clipping or wrapping them if necessary
- var hsv =
+ this.hsv =
{
'h' : (h % 360 + 360) % 360,
's' : Math.max(0, Math.min(100, s)),
};
// initialise the RGB and HSL components to null
- var rgb = null;
- var hsl = null;
+ this.rgb = null;
+ this.hsl = null;
+}
- /* Calculates and stores the RGB components of this HSVColour so that they can
+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.
*/
- function calculateRGB(){
-
+ calculateRGB: function ()
+ {
+ var hsv = this.hsv;
// check whether the saturation is zero
if (hsv.s == 0){
- // set the colour to the appropriate shade of grey
+ // set the Color to the appropriate shade of grey
var r = hsv.v;
var g = hsv.v;
var b = hsv.v;
var q = hsv.v * (1 - hsv.s / 100 * f);
var t = hsv.v * (1 - hsv.s / 100 * (1 - f));
- // set the RGB colour components to their temporary values
+ // 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;
}
// store the RGB components
- rgb =
+ this.rgb =
{
'r' : r * 2.55,
'g' : g * 2.55,
'b' : b * 2.55
};
- }
+ },
- /* Calculates and stores the HSL components of this HSVColour so that they can
+ /* Calculates and stores the HSL components of this HSVColor so that they can
* be returned be the getHSL function.
*/
- function calculateHSL(){
+ 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
- hsl =
+ this.hsl =
{
'h' : hsv.h,
's' : hsv.s * hsv.v / (l < 50 ? l * 2 : 200 - l * 2),
// correct a division-by-zero error
if (isNaN(hsl.s)) hsl.s = 0;
- }
-
- /* Returns the RGB and alpha components of this HSVColour 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].
- */
- this.getRGB = function(){
-
- // calculate the RGB components if necessary
- if (rgb == null) calculateRGB();
-
- // return the RGB components
- return {
- 'r' : rgb.r,
- 'g' : rgb.g,
- 'b' : rgb.b,
- 'a' : alpha
- };
-
- };
-
- /* Returns the HSV and alpha components of this HSVColour 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].
- */
- this.getHSV = function(){
-
- // return the HSV components
- return {
- 'h' : hsv.h,
- 's' : hsv.s,
- 'v' : hsv.v,
- 'a' : alpha
- };
+ }
+
- };
+});
+
- /* Returns the HSL and alpha components of this HSVColour 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].
- */
- this.getHSL = function(){
-
- // calculate the HSL components if necessary
- if (hsl == null) calculateHSL();
-
- // return the HSL components
- return {
- 'h' : hsl.h,
- 's' : hsl.s,
- 'l' : hsl.l,
- 'a' : alpha
- };
-
- };
-
-}
-Roo.lib.HSVColour.prototype = new Roo.lib.Colour();
-
-
-/* Creates a colour specified in the HSL colour space, with an optional alpha
+/**
+ * @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:
*
- * h - the hue component, wrapped to the range [0,360)
- * s - the saturation component, clipped to the range [0,100]
- * l - the lightness component, clipped to the range [0,100]
- * a - the alpha component, clipped to the range [0,1] - this parameter is
+ * @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.HSLColour = function(h, s, l, a){
+Roo.lib.HSLColor = function(h, s, l, a){
// store the alpha component after clipping it if necessary
- var alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
+ this.alpha = (a === undefined ? 1 : Math.max(0, Math.min(1, a)));
// store the HSL components after clipping or wrapping them if necessary
- var hsl =
+ this.hsl =
{
'h' : (h % 360 + 360) % 360,
's' : Math.max(0, Math.min(100, s)),
};
// initialise the RGB and HSV components to null
- var rgb = null;
- var hsv = null;
+}
- /* Calculates and stores the RGB components of this HSLColour so that they can
+Roo.extend(Roo.lib.HSL, Roo.lib.Color, {
+
+ /* Calculates and stores the RGB components of this HSLColor so that they can
* be returned be the getRGB function.
*/
- function calculateRGB(){
+ calculateRGB: function (){
// check whether the saturation is zero
- if (hsl.s == 0){
+ if (this.hsl.s == 0){
// store the RGB components representing the appropriate shade of grey
- rgb =
+ this.rgb =
{
- 'r' : hsl.l * 2.55,
- 'g' : hsl.l * 2.55,
- 'b' : hsl.l * 2.55
+ '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 = hsl.l < 50
- ? hsl.l * (1 + hsl.s / 100)
- : hsl.l + hsl.s - hsl.l * hsl.s / 100;
+ 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
- rgb =
+ this.rgb =
{
'r' : (h + 120) / 60 % 6,
'g' : h / 60,
};
// loop over the RGB components
- for (var key in rgb){
+ for (var key in this.rgb){
// ensure that the property is not inherited from the root object
- if (rgb.hasOwnProperty(key)){
+ if (this.rgb.hasOwnProperty(key)){
// set the component to its value in the range [0,100]
- if (rgb[key] < 1){
- rgb[key] = q + (p - q) * rgb[key];
- }else if (rgb[key] < 3){
- rgb[key] = p;
- }else if (rgb[key] < 4){
- rgb[key] = q + (p - q) * (4 - rgb[key]);
+ 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{
- rgb[key] = q;
+ this.rgb[key] = q;
}
// set the component to its value in the range [0,255]
- rgb[key] *= 2.55;
+ this.rgb[key] *= 2.55;
}
}
- }
+ },
- /* Calculates and stores the HSV components of this HSLColour so that they can
+ /* Calculates and stores the HSV components of this HSLColor so that they can
* be returned be the getHSL function.
*/
- function calculateHSV(){
+ calculateHSV : function(){
// set a temporary value
- var t = hsl.s * (hsl.l < 50 ? hsl.l : 100 - hsl.l) / 100;
+ var t = this.hsl.s * (this.hsl.l < 50 ? this.hsl.l : 100 - this.hsl.l) / 100;
// store the HSV components
- hsv =
+ this.hsv =
{
- 'h' : hsl.h,
- 's' : 200 * t / (hsl.l + t),
- 'v' : t + hsl.l
+ 'h' : this.hsl.h,
+ 's' : 200 * t / (this.hsl.l + t),
+ 'v' : t + this.hsl.l
};
// correct a division-by-zero error
- if (isNaN(hsv.s)) hsv.s = 0;
+ if (isNaN(this.hsv.s)) this.hsv.s = 0;
}
+
- /* Returns the RGB and alpha components of this HSLColour 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].
- */
- this.getRGB = function(){
-
- // calculate the RGB components if necessary
- if (rgb == null) calculateRGB();
-
- // return the RGB components
- return {
- 'r' : rgb.r,
- 'g' : rgb.g,
- 'b' : rgb.b,
- 'a' : alpha
- };
-
- };
-
- /* Returns the HSV and alpha components of this HSLColour 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].
- */
- this.getHSV = function(){
-
- // calculate the HSV components if necessary
- if (hsv == null) calculateHSV();
-
- // return the HSV components
- return {
- 'h' : hsv.h,
- 's' : hsv.s,
- 'v' : hsv.v,
- 'a' : alpha
- };
-
- };
-
- /* Returns the HSL and alpha components of this HSLColour 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].
- */
- this.getHSL = function(){
-
- // return the HSL components
- return {
- 'h' : hsl.h,
- 's' : hsl.s,
- 'l' : hsl.l,
- 'a' : alpha
- };
-
- };
-
-}
-Roo.lib.HSLColour.prototype = new Roo.lib.Colour();
\ No newline at end of file
+});
projects / roojs1 / blobdiff