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