/*----------------------------------------------------------------------------\
|                                Slider 1.02                                  |
|-----------------------------------------------------------------------------|
|                         Created by Erik Arvidsson                           |
|                  (http://webfx.eae.net/contact.html#erik)                   |
|                      For WebFX (http://webfx.eae.net/)                      |
|-----------------------------------------------------------------------------|
| A  slider  control that  degrades  to an  input control  for non  supported |
| browsers.                                                                   |
|-----------------------------------------------------------------------------|
|                Copyright (c) 2002, 2003, 2006 Erik Arvidsson                |
|-----------------------------------------------------------------------------|
| Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| use this file except in compliance with the License.  You may obtain a copy |
| of the License at http://www.apache.org/licenses/LICENSE-2.0                |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| Unless  required  by  applicable law or  agreed  to  in  writing,  software |
| distributed under the License is distributed on an  "AS IS" BASIS,  WITHOUT |
| WARRANTIES OR  CONDITIONS OF ANY KIND,  either express or implied.  See the |
| License  for the  specific language  governing permissions  and limitations |
| under the License.                                                          |
|-----------------------------------------------------------------------------|
| Dependencies: timer.js - an OO abstraction of timers                        |
|               range.js - provides the data model for the slider             |
|               winclassic.css or any other css file describing the look      |
|-----------------------------------------------------------------------------|
| 2002-10-14 | Original version released                                      |
| 2003-03-27 | Added a test in the constructor for missing oElement arg       |
| 2003-11-27 | Only use mousewheel when focused                               |
| 2006-05-28 | Changed license to Apache Software License 2.0.                |
|-----------------------------------------------------------------------------|
| Created 2002-10-14 | All changes are in the log above. | Updated 2006-05-28 |
\----------------------------------------------------------------------------*/
Slider.isSupported = typeof document.createElement != "undefined" &&
typeof document.documentElement != "undefined" &&
typeof document.documentElement.offsetWidth == "number";
function Slider(oElement, oInput, sOrientation) {
if (!oElement) return;
this._orientation = sOrientation || "horizontal";
this._range = new Range();
this._range.setExtent(0);
this._blockIncrement = 10;
this._unitIncrement = 1;
this._timer = new Timer(100);
if (Slider.isSupported && oElement) {
this.document = oElement.ownerDocument || oElement.document;
this.element = oElement;
this.element.slider = this;
this.element.unselectable = "on";
// add class name tag to class name
this.element.className = this._orientation + " " + this.classNameTag + " " + this.element.className;
// create line
this.line = this.document.createElement("DIV");
this.line.className = "line";
this.line.unselectable = "on";
this.line.appendChild(this.document.createElement("DIV"));
this.element.appendChild(this.line);
// create handle
this.handle = this.document.createElement("DIV");
this.handle.className = "handle";
this.handle.unselectable = "on";
this.handle.appendChild(this.document.createElement("DIV"));
this.handle.firstChild.appendChild(
this.document.createTextNode(String.fromCharCode(160)));
this.element.appendChild(this.handle);
}
this.input = oInput;
// events
var oThis = this;
this._range.onchange = function () {
oThis.recalculate();
if (typeof oThis.onchange == "function")
oThis.onchange();
};
if (Slider.isSupported && oElement) {
this.element.onfocus		= Slider.eventHandlers.onfocus;
this.element.onblur			= Slider.eventHandlers.onblur;
this.element.onmousedown	= Slider.eventHandlers.onmousedown;
this.element.onmouseover	= Slider.eventHandlers.onmouseover;
this.element.onmouseout		= Slider.eventHandlers.onmouseout;
this.element.onkeydown		= Slider.eventHandlers.onkeydown;
this.element.onkeypress		= Slider.eventHandlers.onkeypress;
this.element.onmousewheel	= Slider.eventHandlers.onmousewheel;
this.handle.onselectstart	=
this.element.onselectstart	= function () { return false; };
this._timer.ontimer = function () {
oThis.ontimer();
};
// extra recalculate for ie
window.setTimeout(function() {
oThis.recalculate();
}, 1);
}
else {
this.input.onchange = function (e) {
oThis.setValue(oThis.input.value);
};
}
}
Slider.eventHandlers = {
// helpers to make events a bit easier
getEvent:	function (e, el) {
if (!e) {
if (el)
e = el.document.parentWindow.event;
else
e = window.event;
}
if (!e.srcElement) {
var el = e.target;
while (el != null && el.nodeType != 1)
el = el.parentNode;
e.srcElement = el;
}
if (typeof e.offsetX == "undefined") {
e.offsetX = e.layerX;
e.offsetY = e.layerY;
}
return e;
},
getDocument:	function (e) {
if (e.target)
return e.target.ownerDocument;
return e.srcElement.document;
},
getSlider:	function (e) {
var el = e.target || e.srcElement;
while (el != null && el.slider == null)	{
el = el.parentNode;
}
if (el)
return el.slider;
return null;
},
getLine:	function (e) {
var el = e.target || e.srcElement;
while (el != null && el.className != "line")	{
el = el.parentNode;
}
return el;
},
getHandle:	function (e) {
var el = e.target || e.srcElement;
var re = /handle/;
while (el != null && !re.test(el.className))	{
el = el.parentNode;
}
return el;
},
// end helpers
onfocus:	function (e) {
var s = this.slider;
s._focused = true;
s.handle.className = "handle hover";
},
onblur:	function (e) {
var s = this.slider
s._focused = false;
s.handle.className = "handle";
},
onmouseover:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
var s = this.slider;
if (e.srcElement == s.handle)
s.handle.className = "handle hover";
},
onmouseout:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
var s = this.slider;
if (e.srcElement == s.handle && !s._focused)
s.handle.className = "handle";
},
onmousedown:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
var s = this.slider;
if (s.element.focus)
s.element.focus();
Slider._currentInstance = s;
var doc = s.document;
if (doc.addEventListener) {
doc.addEventListener("mousemove", Slider.eventHandlers.onmousemove, true);
doc.addEventListener("mouseup", Slider.eventHandlers.onmouseup, true);
}
else if (doc.attachEvent) {
doc.attachEvent("onmousemove", Slider.eventHandlers.onmousemove);
doc.attachEvent("onmouseup", Slider.eventHandlers.onmouseup);
doc.attachEvent("onlosecapture", Slider.eventHandlers.onmouseup);
s.element.setCapture();
}
if (Slider.eventHandlers.getHandle(e)) {	// start drag
Slider._sliderDragData = {
screenX:	e.screenX,
screenY:	e.screenY,
dx:			e.screenX - s.handle.offsetLeft,
dy:			e.screenY - s.handle.offsetTop,
startValue:	s.getValue(),
slider:		s
};
}
else {
var lineEl = Slider.eventHandlers.getLine(e);
s._mouseX = e.offsetX + (lineEl ? s.line.offsetLeft : 0);
s._mouseY = e.offsetY + (lineEl ? s.line.offsetTop : 0);
s._increasing = null;
s.ontimer();
}
},
onmousemove:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
if (Slider._sliderDragData) {	// drag
var s = Slider._sliderDragData.slider;
var boundSize = s.getMaximum() - s.getMinimum();
var size, pos, reset;
if (s._orientation == "horizontal") {
size = s.element.offsetWidth - s.handle.offsetWidth;
pos = e.screenX - Slider._sliderDragData.dx;
reset = Math.abs(e.screenY - Slider._sliderDragData.screenY) > 100;
}
else {
size = s.element.offsetHeight - s.handle.offsetHeight;
pos = s.element.offsetHeight - s.handle.offsetHeight -
(e.screenY - Slider._sliderDragData.dy);
reset = Math.abs(e.screenX - Slider._sliderDragData.screenX) > 100;
}
s.setValue(reset ? Slider._sliderDragData.startValue :
s.getMinimum() + boundSize * pos / size);
return false;
}
else {
var s = Slider._currentInstance;
if (s != null) {
var lineEl = Slider.eventHandlers.getLine(e);
s._mouseX = e.offsetX + (lineEl ? s.line.offsetLeft : 0);
s._mouseY = e.offsetY + (lineEl ? s.line.offsetTop : 0);
}
}
},
onmouseup:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
var s = Slider._currentInstance;
var doc = s.document;
if (doc.removeEventListener) {
doc.removeEventListener("mousemove", Slider.eventHandlers.onmousemove, true);
doc.removeEventListener("mouseup", Slider.eventHandlers.onmouseup, true);
}
else if (doc.detachEvent) {
doc.detachEvent("onmousemove", Slider.eventHandlers.onmousemove);
doc.detachEvent("onmouseup", Slider.eventHandlers.onmouseup);
doc.detachEvent("onlosecapture", Slider.eventHandlers.onmouseup);
s.element.releaseCapture();
}
if (Slider._sliderDragData) {	// end drag
Slider._sliderDragData = null;
}
else {
s._timer.stop();
s._increasing = null;
}
Slider._currentInstance = null;
},
onkeydown:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
//var s = Slider.eventHandlers.getSlider(e);
var s = this.slider;
var kc = e.keyCode;
switch (kc) {
case 33:	// page up
s.setValue(s.getValue() + s.getBlockIncrement());
break;
case 34:	// page down
s.setValue(s.getValue() - s.getBlockIncrement());
break;
case 35:	// end
s.setValue(s.getOrientation() == "horizontal" ?
s.getMaximum() :
s.getMinimum());
break;
case 36:	// home
s.setValue(s.getOrientation() == "horizontal" ?
s.getMinimum() :
s.getMaximum());
break;
case 38:	// up
case 39:	// right
s.setValue(s.getValue() + s.getUnitIncrement());
break;
case 37:	// left
case 40:	// down
s.setValue(s.getValue() - s.getUnitIncrement());
break;
}
if (kc >= 33 && kc <= 40) {
return false;
}
},
onkeypress:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
var kc = e.keyCode;
if (kc >= 33 && kc <= 40) {
return false;
}
},
onmousewheel:	function (e) {
e = Slider.eventHandlers.getEvent(e, this);
var s = this.slider;
if (s._focused) {
s.setValue(s.getValue() + e.wheelDelta / 120 * s.getUnitIncrement());
// windows inverts this on horizontal sliders. That does not
// make sense to me
return false;
}
}
};
Slider.prototype.classNameTag = "dynamic-slider-control",
Slider.prototype.setValue = function (v) {
this._range.setValue(v);
this.input.value = this.getValue();
};
Slider.prototype.getValue = function () {
return this._range.getValue();
};
Slider.prototype.setMinimum = function (v) {
this._range.setMinimum(v);
this.input.value = this.getValue();
};
Slider.prototype.getMinimum = function () {
return this._range.getMinimum();
};
Slider.prototype.setMaximum = function (v) {
this._range.setMaximum(v);
this.input.value = this.getValue();
};
Slider.prototype.getMaximum = function () {
return this._range.getMaximum();
};
Slider.prototype.setUnitIncrement = function (v) {
this._unitIncrement = v;
};
Slider.prototype.getUnitIncrement = function () {
return this._unitIncrement;
};
Slider.prototype.setBlockIncrement = function (v) {
this._blockIncrement = v;
};
Slider.prototype.getBlockIncrement = function () {
return this._blockIncrement;
};
Slider.prototype.getOrientation = function () {
return this._orientation;
};
Slider.prototype.setOrientation = function (sOrientation) {
if (sOrientation != this._orientation) {
if (Slider.isSupported && this.element) {
// add class name tag to class name
this.element.className = this.element.className.replace(this._orientation,
sOrientation);
}
this._orientation = sOrientation;
this.recalculate();
}
};
Slider.prototype.recalculate = function() {
if (!Slider.isSupported || !this.element) return;
var w = this.element.offsetWidth;
var h = this.element.offsetHeight;
var hw = this.handle.offsetWidth;
var hh = this.handle.offsetHeight;
var lw = this.line.offsetWidth;
var lh = this.line.offsetHeight;
// this assumes a border-box layout
if (this._orientation == "horizontal") {
this.handle.style.left = (w - hw) * (this.getValue() - this.getMinimum()) /
(this.getMaximum() - this.getMinimum()) + "px";
this.handle.style.top = (h - hh) / 2 + "px";
this.line.style.top = (h - lh) / 2 + "px";
this.line.style.left = hw / 2 + "px";
//this.line.style.right = hw / 2 + "px";
this.line.style.width = Math.max(0, w - hw - 2)+ "px";
this.line.firstChild.style.width = Math.max(0, w - hw - 4)+ "px";
}
else {
this.handle.style.left = (w - hw) / 2 + "px";
this.handle.style.top = h - hh - (h - hh) * (this.getValue() - this.getMinimum()) /
(this.getMaximum() - this.getMinimum()) + "px";
this.line.style.left = (w - lw) / 2 + "px";
this.line.style.top = hh / 2 + "px";
this.line.style.height = Math.max(0, h - hh - 2) + "px";	//hard coded border width
//this.line.style.bottom = hh / 2 + "px";
this.line.firstChild.style.height = Math.max(0, h - hh - 4) + "px";	//hard coded border width
}
};
Slider.prototype.ontimer = function () {
var hw = this.handle.offsetWidth;
var hh = this.handle.offsetHeight;
var hl = this.handle.offsetLeft;
var ht = this.handle.offsetTop;
if (this._orientation == "horizontal") {
if (this._mouseX > hl + hw &&
(this._increasing == null || this._increasing)) {
this.setValue(this.getValue() + this.getBlockIncrement());
this._increasing = true;
}
else if (this._mouseX < hl &&
(this._increasing == null || !this._increasing)) {
this.setValue(this.getValue() - this.getBlockIncrement());
this._increasing = false;
}
}
else {
if (this._mouseY > ht + hh &&
(this._increasing == null || !this._increasing)) {
this.setValue(this.getValue() - this.getBlockIncrement());
this._increasing = false;
}
else if (this._mouseY < ht &&
(this._increasing == null || this._increasing)) {
this.setValue(this.getValue() + this.getBlockIncrement());
this._increasing = true;
}
}
this._timer.start();
};