src/ui-mobile/declarative/ColorPicker/colorwheel.js

   1 (function (Raphael) {
   2     Raphael.colorwheel = function (x, y, size, initcolor, element) {
   3         return new ColorWheel(x, y, size, initcolor, element);
   4     };
   5     var pi = Math.PI,
   6         doc = document,
   7         win = window,
   8         ColorWheel = function (x, y, size, initcolor, element) {
   9             size = size || 200;
  10             var w3 = 3 * size / 200,
  11                 w1 = size / 200,
  12                 fi = 1.6180339887,
  13                 segments = pi * size / 5,
  14                 size20 = size / 20,
  15                 size2 = size / 2,
  16                 padding = 2 * size / 200,
  17                 t = this;
  18
  19             var H = 1, S = 1, B = 1, s = size - (size20 * 4);
  20             var r = element ? Raphael(element, size, size) : Raphael(x, y, size, size),
  21                 xy = s / 6 + size20 * 2 + padding,
  22                 wh = s * 2 / 3 - padding * 2;
  23             w1 < 1 && (w1 = 1);
  24             w3 < 1 && (w3 = 1);
  25
  26
  27             // ring drawing
  28             var a = pi / 2 - pi * 2 / segments * 1.3,
  29                 R = size2 - padding,
  30                 R2 = size2 - padding - size20 * 2,
  31                 path = ["M", size2, padding, "A", R, R, 0, 0, 1, R * Math.cos(a) + R + padding, R - R * Math.sin(a) + padding, "L", R2 * Math.cos(a) + R + padding, R - R2 * Math.sin(a) + padding, "A", R2, R2, 0, 0, 0, size2, padding + size20 * 2, "z"].join();
  32             for (var i = 0; i < segments; i++) {
  33                 r.path(path).attr({
  34                     stroke: "none",
  35                     fill: "hsb(" + i * (255 / segments) / 255 + ", 1, 0.78)",
  36                     transform: "r" + [(360 / segments) * i, size2, size2]
  37                 });
  38             }
  39             r.path(["M", size2, padding, "A", R, R, 0, 1, 1, size2 - 1, padding, "l1,0", "M", size2, padding + size20 * 2, "A", R2, R2, 0, 1, 1, size2 - 1, padding + size20 * 2, "l1,0"]).attr({
  40                 "stroke-width": w3,
  41                 stroke: "#fff"
  42             });
  43             t.cursorhsb = r.set();
  44             var h = size20 * 2 + 2;
  45             t.cursorhsb.push(r.rect(size2 - h / fi / 2, padding - 1, h / fi, h, 3 * size / 200).attr({
  46                 stroke: "#000",
  47                 opacity: .5,
  48                 "stroke-width": w3
  49             }));
  50             t.cursorhsb.push(t.cursorhsb[0].clone().attr({
  51                 stroke: "#fff",
  52                 opacity: 1,
  53                 "stroke-width": w1
  54             }));
  55             t.ring = r.path(["M", size2, padding, "A", R, R, 0, 1, 1, size2 - 1, padding, "l1,0M", size2, padding + size20 * 2, "A", R2, R2, 0, 1, 1, size2 - 1, padding + size20 * 2, "l1,0"]).attr({
  56                 fill: "#000",
  57                 opacity: 0,
  58                 stroke: "none"
  59             });
  60
  61             // rect drawing
  62             t.main = r.rect(xy, xy, wh, wh).attr({
  63                 stroke: "none",
  64                 fill: "#f00",
  65                 opacity: 1
  66             });
  67             t.main.clone().attr({
  68                 stroke: "none",
  69                 fill: "0-#fff-#fff",
  70                 opacity: 0
  71             });
  72             t.square = r.rect(xy - 1, xy - 1, wh + 2, wh + 2).attr({
  73                 r: 2,
  74                 stroke: "#fff",
  75                 "stroke-width": w3,
  76                 fill: "90-#000-#000",
  77                 opacity: 0,
  78                 cursor: "crosshair"
  79             });
  80             t.cursor = r.set();
  81             t.cursor.push(r.circle(size2, size2, size20 / 2).attr({
  82                 stroke: "#000",
  83                 opacity: .5,
  84                 "stroke-width": w3
  85             }));
  86             t.cursor.push(t.cursor[0].clone().attr({
  87                 stroke: "#fff",
  88                 opacity: 1,
  89                 "stroke-width": w1
  90             }));
  91             t.H = t.S = t.B = 1;
  92             t.raphael = r;
  93             t.size2 = size2;
  94             t.wh = wh;
  95             t.x = x;
  96             t.xy = xy;
  97             t.y = y;
  98
  99             // events
 100             t.ring.drag(function (dx, dy, x, y) {
 101                 t.docOnMove(dx, dy, x, y);
 102             }, function (x, y) {
 103                 t.hsbOnTheMove = true;
 104                 t.setH(x - t.x - t.size2, y - t.y - t.size2);
 105             }, function () {
 106                 t.hsbOnTheMove = false;
 107             });
 108             t.square.drag(function (dx, dy, x, y) {
 109                 t.docOnMove(dx, dy, x, y);
 110             }, function (x, y) {
 111                 t.clrOnTheMove = true;
 112                 t.setSB(x - t.x, y - t.y);
 113             }, function () {
 114                 t.clrOnTheMove = false;
 115             });
 116
 117             t.color(initcolor || "#f00");
 118             this.onchanged && this.onchanged(this.color());
 119         },
 120         proto = ColorWheel.prototype;
 121     proto.setH = function (x, y) {
 122         var d = Raphael.angle(x, y, 0, 0),
 123             rd = Raphael.rad(d);
 124         this.cursorhsb.attr({transform: "r" + [d + 90, this.size2, this.size2]});
 125         this.H = (d + 90) / 360;
 126         this.main.attr({fill: "hsb(" + this.H + ",1,1)"});
 127         this.onchange && this.onchange(this.color());
 128     };
 129     proto.setSB = function (x, y) {
 130         var me = this;
 131         x < me.size2 - me.wh / 2 && (x = me.size2 - me.wh / 2);
 132         x > me.size2 + me.wh / 2 && (x = me.size2 + me.wh / 2);
 133         y < me.size2 - me.wh / 2 && (y = me.size2 - me.wh / 2);
 134         y > me.size2 + me.wh / 2 && (y = me.size2 + me.wh / 2);
 135         me.cursor.attr({cx: x, cy: y});
 136         me.B = 1 - (y - me.xy) / me.wh;
 137         me.S = (x - me.xy) / me.wh;
 138         me.onchange && me.onchange(me.color());
 139     };
 140     proto.docOnMove = function (dx, dy, x, y) {
 141         if (this.hsbOnTheMove) {
 142             this.setH(x - this.x - this.size2, y - this.y - this.size2);
 143         }
 144         if (this.clrOnTheMove) {
 145             this.setSB(x - this.x, y - this.y);
 146         }
 147     };
 148     proto.remove = function () {
 149         this.raphael.remove();
 150         this.color = function () {
 151             return false;
 152         };
 153     };
 154     proto.color = function (color) {
 155         if (color) {
 156             color = Raphael.color(color);
 157             var d = color.h * 360;
 158             this.H = color.h;
 159             this.S = color.s;
 160             this.B = color.v;
 161             this.cursorhsb.attr({transform: "r" + [d, this.size2, this.size2]});
 162             this.main.attr({fill: "hsb(" + this.H + ",1,1)"});
 163             var x = this.S * this.wh + this.xy,
 164                 y = (1 - this.B) * this.wh + this.xy;
 165             this.cursor.attr({cx: x, cy: y});
 166             return this;
 167         } else {
 168             return Raphael.hsb2rgb(this.H, this.S, this.B).hex;
 169         }
 170     };
 171 })(window.Raphael);