vnumpad.js

用Javascript在网页上虚拟键盘的源码

/* JavaScript Virtual Keyboard (numpad variant), version 2.4
 *
 * Copyright (C) 2006-2007 Dmitriy Khudorozhkov (mailto:[e-mail])
 *
 * This software is provided "as-is", without any express or implied warranty.
 * In no event will the author be held liable for any damages arising from the
 * use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */

function VNumpad(container_id, callback_ref, font_name, font_size,
                   font_color, bg_color, key_color, border_color,
                   show_click, click_font_color, click_bg_color,
                   click_border_color, do_embed, do_gap)
{
  return this._construct(container_id, callback_ref, font_name, font_size,
                         font_color, bg_color, key_color, border_color,
                         show_click, click_font_color, click_bg_color,
                         click_border_color, do_embed, do_gap);
}

VNumpad.kbArray = [];

VNumpad.prototype = {

  _setup_event: function(elem, eventType, handler)
  {
    return (elem.attachEvent ? elem.attachEvent("on" + eventType, handler) : ((elem.addEventListener) ? elem.addEventListener(eventType, handler, false) : null));
  },

  _start_flash: function(in_el)
  {
    function getColor(str, posOne, posTwo)
    {
      if(/rgb\((\d+),\s(\d+),\s(\d+)\)/.exec(str)) // try to detect Mozilla-style rgb value.
      {
        switch(posOne)
        {
          case 1: return parseInt(RegExp.$1, 10);
          case 2: return parseInt(RegExp.$2, 10);
          case 3: return parseInt(RegExp.$3, 10);
          default: return 0;
        }
      }
      else // standard (#xxxxxx or #xxx) way
        return str.length == 4 ? parseInt(str.substr(posOne, 1) + str.substr(posOne, 1), 16) : parseInt(str.substr(posTwo, 2), 16);
    }

    function getR(color_string)
    { return getColor(color_string, 1, 1); }

    function getG(color_string)
    { return getColor(color_string, 2, 3); }

    function getB(color_string)
    { return getColor(color_string, 3, 5); }

    var el = in_el.time ? in_el : (in_el.company && in_el.company.time ? in_el.company : null);
    if(el)
    {
      el.time = 0;
      clearInterval(el.timer);
    }

    var vkb = this;
    var ftc = vkb.fontcolor, bgc = vkb.keycolor, brc = vkb.bordercolor;

    // Special fixes for simple/dead/modifier keys:

    if(in_el.dead)
      ftc = vkb.deadcolor;

    if(((in_el.innerHTML == "Shift") && vkb.Shift) || ((in_el.innerHTML == "Caps") && vkb.Caps) || ((in_el.innerHTML == "AltGr") && vkb.AltGr))
      bgc = vkb.lic;

    // Extract base color values:
    var fr = getR(ftc), fg = getG(ftc), fb = getB(ftc);
    var kr = getR(bgc), kg = getG(bgc), kb = getB(bgc);
    var br = getR(brc), bg = getG(brc), bb = getB(brc);

    // Extract flash color values:
    var f_r = getR(vkb.cfc), f_g = getG(vkb.cfc), f_b = getB(vkb.cfc);
    var k_r = getR(vkb.cbg), k_g = getG(vkb.cbg), k_b = getB(vkb.cbg);
    var b_r = getR(vkb.cbr), b_g = getG(vkb.cbr), b_b = getB(vkb.cbr);

    var _shift_colors = function()
    {
      function dec2hex(dec)
      {
        var hexChars = "0123456789ABCDEF";
        var a = dec % 16;
        var b = (dec - a) / 16;

        return hexChars.charAt(b) + hexChars.charAt(a) + "";
      }

      in_el.time = !in_el.time ? 10 : (in_el.time - 1);

      function calc_color(start, end)
      { return (end - (in_el.time / 10) * (end - start)); }

      var t_f_r = calc_color(f_r, fr), t_f_g = calc_color(f_g, fg), t_f_b = calc_color(f_b, fb);
      var t_k_r = calc_color(k_r, kr), t_k_g = calc_color(k_g, kg), t_k_b = calc_color(k_b, kb);
      var t_b_r = calc_color(b_r, br), t_b_g = calc_color(b_g, bg), t_b_b = calc_color(b_b, bb);

      in_el.style.color = "#" + dec2hex(t_f_r) + dec2hex(t_f_g) + dec2hex(t_f_b);
      in_el.style.borderColor = "#" + dec2hex(t_b_r) + dec2hex(t_b_g) + dec2hex(t_b_b);
      in_el.style.backgroundColor = "#" + dec2hex(t_k_r) + dec2hex(t_k_g) + dec2hex(t_k_b);

      if(!in_el.time)
      {
        clearInterval(in_el.timer);
        return;
      }
    };

    _shift_colors();

    in_el.timer = window.setInterval(_shift_colors, 50);
  },

  _setup_style: function(obj, top, left, width, height, position, border_color, bg_color, text_align, line_height, font_size, font_weight, padding_left, padding_right)
  {
    var os = obj.style;

    if(top)    os.top = top;
    if(left)   os.left = left;
    if(width)  os.width = width;
    if(height) os.height = height;

    if(position) os.position = position;

    if(border_color) os.border = "1px solid " + border_color;
    if(bg_color) os.backgroundColor = bg_color;

    if(text_align)  os.textAlign  = text_align;
    if(line_height) os.lineHeight = line_height;
    if(font_size)   os.fontSize   = font_size;

    os.fontWeight = font_weight || "bold";

    if(padding_left)  os.paddingLeft  = padding_left;
    if(padding_right) os.paddingRight = padding_right;
  },

  _setup_key: function(parent, id, top, left, width, height, border_color, bg_color, text_align, line_height, font_size, font_weight, padding_left, padding_right)
  {
    var _id = this.Cntr.id + id;
    var exists = document.getElementById(_id);

    var key = exists ? exists.parentNode : document.createElement("DIV");
    this._setup_style(key, top, left, width, height, "absolute");

    var key_sub = exists || document.createElement("DIV");
    key.appendChild(key_sub); parent.appendChild(key);

    this._setup_style(key_sub, "", "", "", line_height, "relative", border_color, bg_color, text_align, line_height, font_size, font_weight, padding_left, padding_right);
    key_sub.id = _id;

    if(!exists) this._setup_event(key_sub, 'mousedown', this._generic_callback_proc);

    return key_sub;
  },

  _findX: function(obj)
  { return (obj && obj.parentNode) ? parseFloat(obj.parentNode.offsetLeft) : 0; },

  _findY: function(obj)
  { return (obj && obj.parentNode) ? parseFloat(obj.parentNode.offsetTop) : 0; },

  _findW: function(obj)
  { return (obj && obj.parentNode) ? parseFloat(obj.parentNode.offsetWidth) : 0; },

  _findH: function(obj)
  { return (obj && obj.parentNode) ? parseFloat(obj.parentNode.offsetHeight) : 0; },

  _construct: function(container_id, callback_ref, font_name, font_size, font_color, bg_color, key_color, border_color,
                       show_click, click_font_color, click_bg_color, click_border_color, do_embed, do_gap)
  {
    var exists  = (this.Cntr != undefined), ct = exists ? this.Cntr : document.getElementById(container_id);
    var changed = (font_size && (font_size != this.fontsize));

    this._Callback = ((typeof(callback_ref) == "function") && ((callback_ref.length == 1) || (callback_ref.length == 2))) ? callback_ref : (this._Callback || null);

    var ff = font_name || this.fontname || "";
    var fs = font_size || this.fontsize || "14px";

    var fc = font_color   || this.fontcolor   || "#000";
    var bg = bg_color     || this.bgcolor     || "#FFF";
    var kc = key_color    || this.keycolor    || "#FFF";
    var bc = border_color || this.bordercolor || "#777";

    this.cfc = click_font_color   || this.cfc || "#CC3300";
    this.cbg = click_bg_color     || this.cbg || "#FF9966";
    this.cbr = click_border_color || this.cbr || "#CC3300";

    this.sc = (show_click == undefined) ? ((this.sc == undefined) ? false : this.sc) : show_click;
    this.gap = (do_gap != undefined) ? (do_gap ? 1 : -1) : (this.gap || 1);

    this.fontname = ff, this.fontsize = fs, this.fontcolor = fc;
    this.bgcolor = bg,  this.keycolor = kc, this.bordercolor = bc;

    if(!exists)
    {
      this.Cntr = ct, this.LastKey = null;

      VNumpad.kbArray[container_id] = this;