dojox/gfx/gradutils.js

• Provides:

  • dojox.gfx.gradutils

• Requires:

  • dojox.gfx.matrix in common

• dojox.gfx.gradutils.getColor

  • type

    Function

  • parameters:
    • fill: (typeof Object)

      fill object

    • pt: (typeof dojox.gfx.Point)

      point where to sample a color

  • source: [view]
      var o;
      if(fill){
       switch(fill.type){
        case "linear":
         var angle = Math.atan2(fill.y2 - fill.y1, fill.x2 - fill.x1),
          rotation = m.rotate(-angle),
          projection = m.project(fill.x2 - fill.x1, fill.y2 - fill.y1),
          p = m.multiplyPoint(projection, pt),
          pf1 = m.multiplyPoint(projection, fill.x1, fill.y1),
          pf2 = m.multiplyPoint(projection, fill.x2, fill.y2),
          scale = m.multiplyPoint(rotation, pf2.x - pf1.x, pf2.y - pf1.y).x,
          o = m.multiplyPoint(rotation, p.x - pf1.x, p.y - pf1.y).x / scale;
         break;
        case "radial":
         var dx = pt.x - fill.cx, dy = pt.y - fill.cy,
          o = Math.sqrt(dx * dx + dy * dy) / fill.r;
         break;
       }
       return findColor(o, fill.colors); // dojo.Color
      }
      // simple color
      return new C(fill || [0, 0, 0, 0]); // dojo.Color
  • summary

    sample a color from a gradient using a point

  • returns

    dojo.Color

• dojox.gfx.gradutils.reverse

  • type

    Function

  • parameters:
    • fill: (typeof Object)

      fill object

  • source: [view]
      if(fill){
       switch(fill.type){
        case "linear":
        case "radial":
         fill = dojo.delegate(fill);
         if(fill.colors){
          var c = fill.colors, l = c.length, i = 0, stop,
           n = fill.colors = new Array(c.length);
          for(; i < l; ++i){
           stop = c[i];
           n[i] = {
            offset: 1 - stop.offset,
            color: stop.color
           };
          }
          n.sort(function(a, b){ return a.offset - b.offset; });
         }
         break;
       }
      }
      return fill; // Object
  • summary

    reverses a gradient

  • returns

    Object

• dojox.gfx.gradutils

  • type

    Object

  • summary

• dojox.gfx

  • type

    Object

  • summary

• dojox

  • type

    Object

  • summary