RGB Converter.wdgt/Widget.js

   1 /*=====================================================================*\
   2 || ###################################################################
   3 || # RGB Converter
   4 || # Copyright (c)2002-2010 Blue Static
   5 || #
   6 || # This program is free software; you can redistribute it and/or modify
   7 || # it under the terms of the GNU General Public License as published by
   8 || # the Free Software Foundation; version 2 of the License.
   9 || #
  10 || # This program is distributed in the hope that it will be useful, but
  11 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13 || # more details.
  14 || #
  15 || # You should have received a copy of the GNU General Public License along
  16 || # with this program; if not, write to the Free Software Foundation, Inc.,
  17 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  18 || ###################################################################
  19 \*=====================================================================*/
  20
  21 var colors_ = {
  22   red   : 60,
  23   green : 60,
  24   blue  : 60,
  25   hex   : '3C3C3C'
  26 };
  27
  28 // ###################################################################
  29 // widget init
  30 function setup()
  31 {
  32   Draw();
  33   createGenericButton(document.getElementById("backbutton"), "Done", hide_back, 0);
  34   document.getElementById("revision").innerHTML = "(r" + document.getElementById("revision").innerHTML.replace(/[^0-9]/g, "") + ")";
  35 }
  36
  37 // ###################################################################
  38 // watches the three RGB fields to make sure they don't go over the limites
  39 function rgbwatcher(color)
  40 {
  41   field = document.getElementById(color + "input");
  42
  43   // handle RGB triads
  44   if (triad = field.value.match(/(rgb)?\(?([0-9]{1,3}),\s?([0-9]{1,3}),\s?([0-9]{1,3})\)?/))
  45   {
  46     document.getElementById("redinput").value = triad[2];
  47     document.getElementById("greeninput").value = triad[3];
  48     document.getElementById("blueinput").value = triad[4];
  49
  50     rgbwatcher("red");
  51     rgbwatcher("green");
  52     rgbwatcher("blue");
  53     return;
  54   }
  55
  56   // sanitize the number
  57   var newval = field.value.replace(/[^0-9\-\.]*/g, "");
  58   newval = Math.floor(newval);
  59
  60   // make sure we don't go over 255
  61   if (newval > 255)
  62   {
  63     newval = 255;
  64   }
  65   else if (newval < 0)
  66   {
  67     newval = 0;
  68   }
  69
  70   // update the text field
  71   field.value = newval;
  72
  73   // set fields[]
  74   colors_[color] = newval;
  75
  76   // set hex
  77   update_hex();
  78
  79   // redraw the swatch
  80   Draw();
  81 }
  82
  83 // ###################################################################
  84 function Draw()
  85 {
  86   var canvas  = document.getElementById('wheel');
  87   var context = canvas.getContext('2d');
  88   var radius  = canvas.width / 2 - 3;
  89   var center  = [canvas.width / 2, canvas.height / 2];
  90   context.strokeStyle = 'black';
  91
  92   // Draw the individual components. Start with red.
  93   context.beginPath();
  94   context.moveTo(center[0], center[1]);
  95   context.arc(canvas.width / 2,
  96               canvas.height / 2,
  97               radius,
  98               Math.PI * 4/3,
  99               Math.PI * 6/3,
 100               false);
 101   context.lineTo(center[0], center[1]);
 102   context.fillStyle = _GetComponentColorString('red');
 103   context.fill();
 104   context.stroke();
 105
 106   // Green component.
 107   context.beginPath();
 108   context.moveTo(center[0], center[1]);
 109   context.arc(canvas.width / 2,
 110               canvas.height / 2,
 111               radius,
 112               Math.PI * 0,
 113               Math.PI * 2/3,
 114               false);
 115   context.lineTo(center[0], center[1]);
 116   context.fillStyle = _GetComponentColorString('green');
 117   context.fill();
 118   context.stroke();
 119
 120   // Blue component.
 121   context.beginPath();
 122   context.moveTo(center[0], center[1]);
 123   context.arc(canvas.width / 2,
 124               canvas.height / 2,
 125               radius,
 126               Math.PI * 2/3,
 127               Math.PI * 4/3,
 128               false);
 129   context.lineTo(center[0], center[1]);
 130   context.fillStyle = _GetComponentColorString('blue');
 131   context.fill();
 132   context.stroke();
 133
 134   // Draw the sheen gradient.
 135   context.beginPath();
 136   context.arc(center[0], center[1], radius, 0, Math.PI * 2, true);
 137   var gradient = context.createLinearGradient(0, 0, 0, canvas.height);
 138   gradient.addColorStop(0, 'rgba(255,255,255,.5)');
 139   gradient.addColorStop(1, 'rgba(0,0,0,0)');
 140   context.fillStyle = gradient;
 141   context.fill();
 142   context.closePath();
 143
 144   // Draw the inner wheel.
 145   context.beginPath();
 146   context.arc(center[0], center[1], canvas.width / 4.75, 0, Math.PI * 2, true);
 147   context.fillStyle = _GetRGBColorString();
 148   context.fill();
 149   context.strokeStyle = 'black';
 150   context.stroke();
 151   context.closePath();
 152 }
 153
 154 // ###################################################################
 155 // Returns the rgb(,,,) color string.
 156
 157 function _GetRGBColorString()
 158 {
 159   return 'rgb(' + colors_.red + ',' + colors_.green + ',' + colors_.blue + ')';
 160 }
 161
 162 // ###################################################################
 163 // Returns an individual color component's color string.
 164
 165 function _GetComponentColorString(color)
 166 {
 167   if (color == 'red') {
 168     return 'rgb(' + colors_.red + ',0,0)';
 169   } else if (color == 'green') {
 170     return 'rgb(0,' + colors_.green + ',0)';
 171   } else if (color == 'blue') {
 172     return 'rgb(0,0,' + colors_.blue + ')';
 173   }
 174   alert('Invalid color ' + color);
 175 }
 176
 177 // ###################################################################
 178 // watches the hex field for updates
 179 function hexwatcher()
 180 {
 181   field = document.getElementById("hexinput");
 182
 183   // sanitize the hex
 184   var newval = field.value.replace(/[^0-9a-f]*/gi, "");
 185
 186   // get the length
 187   var length = newval.length;
 188
 189   // make sure we're always 6
 190   if (length > 6)
 191   {
 192     newval = newval.substr(0, 6);
 193   }
 194   else if (length == 3)
 195   {
 196     newval = newval.substr(0, 1) + newval.substr(0, 1) + newval.substr(1, 1) + newval.substr(1, 1) + newval.substr(2, 1) + newval.substr(2, 1);
 197   }
 198   else if (length < 6)
 199   {
 200     for (var i = length; i <= 6; i++)
 201     {
 202       newval = "" + newval + "0";
 203     }
 204   }
 205
 206   // update the field
 207   field.value = newval;
 208
 209   // update fields[]
 210   colors_.hex = newval;
 211
 212   // set RGB
 213   update_rgb();
 214
 215   // redraw the swatch
 216   Draw();
 217 }
 218
 219 // ###################################################################
 220 // update the hex value
 221 function update_hex()
 222 {
 223   var hexstr = dec2hex(colors_.red) + dec2hex(colors_.green) + dec2hex(colors_.blue);
 224   colors_.hex = hexstr;
 225   document.getElementById("hexinput").value = hexstr;
 226 }
 227
 228 // ###################################################################
 229 // update the RGB values
 230 function update_rgb()
 231 {
 232   // regex match the bits
 233   var bits = colors_.hex.match(/(..)(..)(..)/);
 234
 235   colors_.red = hex2dec(bits[1]);
 236   colors_.green = hex2dec(bits[2]);
 237   colors_.blue = hex2dec(bits[3]);
 238
 239   // construct the hex values
 240   document.getElementById("redinput").value = colors_.red;
 241   document.getElementById("greeninput").value = colors_.green;
 242   document.getElementById("blueinput").value = colors_.blue;
 243 }
 244
 245 // ###################################################################
 246 // convert a decimal to a hexidecimal
 247 function dec2hex(dec)
 248 {
 249   var hexstr = "0123456789ABCDEF";
 250   var low = dec % 16;
 251   var high = (dec - low) / 16;
 252   hex = "" + hexstr.charAt(high) + hexstr.charAt(low);
 253
 254   return hex.toString();
 255 }
 256
 257 // ###################################################################
 258 // converts a hexidecimal to a decimal
 259 function hex2dec(hex)
 260 {
 261   return parseInt(hex, 16);
 262 }
 263
 264 // ###################################################################
 265 // ###################################################################
 266 // ###################################################################
 267
 268 // flip data
 269
 270 function show_back()
 271 {
 272   var front = document.getElementById("front");
 273   var back = document.getElementById("back");
 274
 275   if (window.widget)
 276   {
 277     widget.prepareForTransition("ToBack");
 278   }
 279
 280   front.style.display = "none";
 281   back.style.display = "block";
 282
 283   if (window.widget)
 284   {
 285     setTimeout("widget.performTransition();", 0);
 286   }
 287
 288   document.getElementById("fliprollie").style.display = "none";
 289 }
 290
 291 function hide_back()
 292 {
 293   var front = document.getElementById("front");
 294   var back = document.getElementById("back");
 295
 296   if (window.widget)
 297   {
 298     widget.prepareForTransition("ToFront");
 299   }
 300
 301   back.style.display = "none";
 302   front.style.display = "block";
 303
 304   if (window.widget)
 305   {
 306     setTimeout("widget.performTransition();", 0);
 307   }
 308 }
 309
 310 var flipShown = false;
 311
 312 var animation = {
 313   duration : 0,
 314   starttime : 0,
 315   to : 1.0,
 316   now : 0.0,
 317   from : 0.0,
 318   firstElement : null,
 319   timer : null
 320 };
 321
 322 function mousemove(event)
 323 {
 324   if (!flipShown)
 325   {
 326     if (animation.timer != null)
 327     {
 328       clearInterval(animation.timer);
 329       animation.timer  = null;
 330     }
 331
 332     var starttime = (new Date).getTime() - 13;
 333
 334     animation.duration = 500;
 335     animation.starttime = starttime;
 336     animation.firstElement = document.getElementById("flip");
 337     animation.timer = setInterval("animate();", 13);
 338     animation.from = animation.now;
 339     animation.to = 1.0;
 340     animate();
 341     flipShown = true;
 342   }
 343 }
 344
 345 function mouseexit(event)
 346 {
 347   if (flipShown)
 348   {
 349     // fade in the flip widget
 350     if (animation.timer != null)
 351     {
 352       clearInterval (animation.timer);
 353       animation.timer  = null;
 354     }
 355
 356     var starttime = (new Date).getTime() - 13;
 357
 358     animation.duration = 500;
 359     animation.starttime = starttime;
 360     animation.firstElement = document.getElementById("flip");
 361     animation.timer = setInterval("animate();", 13);
 362     animation.from = animation.now;
 363     animation.to = 0.0;
 364     animate();
 365     flipShown = false;
 366   }
 367 }
 368
 369
 370 function animate()
 371 {
 372   var T;
 373   var ease;
 374   var time = (new Date).getTime();
 375
 376   T = limit_3(time - animation.starttime, 0, animation.duration);
 377
 378   if (T >= animation.duration)
 379   {
 380     clearInterval(animation.timer);
 381     animation.timer = null;
 382     animation.now = animation.to;
 383   }
 384   else
 385   {
 386     ease = 0.5 - (0.5 * Math.cos(Math.PI * T / animation.duration));
 387     animation.now = compute_next_float(animation.from, animation.to, ease);
 388   }
 389
 390   animation.firstElement.style.opacity = animation.now;
 391 }
 392
 393 function limit_3 (a, b, c)
 394 {
 395     return a < b ? b : (a > c ? c : a);
 396 }
 397
 398 function compute_next_float(from, to, ease)
 399 {
 400     return from + (to - from) * ease;
 401 }
 402
 403 function enterflip(event)
 404 {
 405   document.getElementById("fliprollie").style.display = "block";
 406 }
 407
 408 function exitflip(event)
 409 {
 410   document.getElementById("fliprollie").style.display = "none";
 411 }
 412
 413 /*=====================================================================*\
 414 || ###################################################################
 415 || # $HeadURL$
 416 || # $Id$
 417 || ###################################################################
 418 \*=====================================================================*/