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dpavlin |
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/*----------------------------------------------------------------------------\ |
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| Range Class | |
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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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| Used to model the data used when working with sliders, scrollbars and | |
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| progress bars. Based on the ideas of the javax.swing.BoundedRangeModel | |
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| interface defined by Sun for Java. http://java.sun.com/products/jfc/ | |
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| swingdoc-api-1.0.3/com/sun/java/swing/BoundedRangeModel.html | | |
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|-----------------------------------------------------------------------------| |
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| Copyright (c) 1999 - 2002 Erik Arvidsson | |
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|-----------------------------------------------------------------------------| |
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| This software is provided "as is", without warranty of any kind, express or | |
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| implied, including but not limited to the warranties of merchantability, | |
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| fitness for a particular purpose and noninfringement. In no event shall the | |
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| authors or copyright holders be liable for any claim, damages or other | |
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| liability, whether in an action of contract, tort or otherwise, arising | |
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| from, out of or in connection with the software or the use or other | |
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| dealings in the software. | |
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| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
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| This software is available under the three different licenses mentioned | |
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| below. To use this software you must chose, and qualify, for one of those. | |
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| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
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| The WebFX Non-Commercial License http://webfx.eae.net/license.html | |
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| Permits anyone the right to use the software in a non-commercial context | |
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| free of charge. | |
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| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
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| The WebFX Commercial license http://webfx.eae.net/commercial.html | |
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| Permits the license holder the right to use the software in a commercial | |
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| context. Such license must be specifically obtained, however it's valid for | |
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| any number of implementations of the licensed software. | |
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| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
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| GPL - The GNU General Public License http://www.gnu.org/licenses/gpl.txt | |
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| Permits anyone the right to use and modify the software without limitations | |
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| as long as proper credits are given and the original and modified source | |
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| code are included. Requires that the final product, software derivate from | |
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| the original source or any software utilizing a GPL component, such as | |
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| this, is also licensed under the GPL license. | |
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|-----------------------------------------------------------------------------| |
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| 2002-10-14 | Original version released | |
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|-----------------------------------------------------------------------------| |
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| Created 2002-10-14 | All changes are in the log above. | Updated 2002-10-14 | |
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\----------------------------------------------------------------------------*/ |
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function Range() { |
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this._value = 0; |
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this._minimum = 0; |
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this._maximum = 100; |
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this._extent = 0; |
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this._isChanging = false; |
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} |
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Range.prototype.setValue = function (value) { |
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value = parseInt(value); |
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if (isNaN(value)) return; |
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if (this._value != value) { |
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if (value + this._extent > this._maximum) |
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this._value = this._maximum - this._extent; |
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else if (value < this._minimum) |
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this._value = this._minimum; |
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else |
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this._value = value; |
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if (!this._isChanging && typeof this.onchange == "function") |
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this.onchange(); |
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} |
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}; |
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Range.prototype.getValue = function () { |
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return this._value; |
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}; |
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Range.prototype.setExtent = function (extent) { |
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if (this._extent != extent) { |
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if (extent < 0) |
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this._extent = 0; |
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else if (this._value + extent > this._maximum) |
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this._extent = this._maximum - this._value; |
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else |
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this._extent = extent; |
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if (!this._isChanging && typeof this.onchange == "function") |
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this.onchange(); |
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} |
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}; |
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Range.prototype.getExtent = function () { |
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return this._extent; |
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}; |
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Range.prototype.setMinimum = function (minimum) { |
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if (this._minimum != minimum) { |
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var oldIsChanging = this._isChanging; |
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this._isChanging = true; |
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this._minimum = minimum; |
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if (minimum > this._value) |
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this.setValue(minimum); |
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if (minimum > this._maximum) { |
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this._extent = 0; |
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this.setMaximum(minimum); |
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this.setValue(minimum) |
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} |
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if (minimum + this._extent > this._maximum) |
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this._extent = this._maximum - this._minimum; |
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this._isChanging = oldIsChanging; |
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if (!this._isChanging && typeof this.onchange == "function") |
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this.onchange(); |
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} |
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}; |
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Range.prototype.getMinimum = function () { |
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return this._minimum; |
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}; |
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Range.prototype.setMaximum = function (maximum) { |
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if (this._maximum != maximum) { |
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var oldIsChanging = this._isChanging; |
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this._isChanging = true; |
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this._maximum = maximum; |
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if (maximum < this._value) |
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this.setValue(maximum - this._extent); |
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if (maximum < this._minimum) { |
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this._extent = 0; |
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this.setMinimum(maximum); |
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this.setValue(this._maximum); |
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} |
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if (maximum < this._minimum + this._extent) |
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this._extent = this._maximum - this._minimum; |
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if (maximum < this._value + this._extent) |
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this._extent = this._maximum - this._value; |
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this._isChanging = oldIsChanging; |
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if (!this._isChanging && typeof this.onchange == "function") |
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this.onchange(); |
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} |
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}; |
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Range.prototype.getMaximum = function () { |
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return this._maximum; |
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}; |
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