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azammitdcarf
2008-10-15 22:36:05 +00:00
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include/limesurvey/scripts/slider/range.js Normal file
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/*----------------------------------------------------------------------------\
| Range Class |
|-----------------------------------------------------------------------------|
| Created by Erik Arvidsson |
| (http://webfx.eae.net/contact.html#erik) |
| For WebFX (http://webfx.eae.net/) |
|-----------------------------------------------------------------------------|
| Used to model the data used when working with sliders, scrollbars and |
| progress bars. Based on the ideas of the javax.swing.BoundedRangeModel |
| interface defined by Sun for Java. http://java.sun.com/products/jfc/ |
| swingdoc-api-1.0.3/com/sun/java/swing/BoundedRangeModel.html | |
|-----------------------------------------------------------------------------|
| Copyright (c) 1999 - 2002 Erik Arvidsson |
|-----------------------------------------------------------------------------|
| This software is provided "as is", without warranty of any kind, express or |
| implied, including but not limited to the warranties of merchantability, |
| fitness for a particular purpose and noninfringement. In no event shall the |
| authors or copyright holders be liable for any claim, damages or other |
| liability, whether in an action of contract, tort or otherwise, arising |
| from, out of or in connection with the software or the use or other |
| dealings in the software. |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| This software is available under the three different licenses mentioned |
| below. To use this software you must chose, and qualify, for one of those. |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| The WebFX Non-Commercial License http://webfx.eae.net/license.html |
| Permits anyone the right to use the software in a non-commercial context |
| free of charge. |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| The WebFX Commercial license http://webfx.eae.net/commercial.html |
| Permits the license holder the right to use the software in a commercial |
| context. Such license must be specifically obtained, however it's valid for |
| any number of implementations of the licensed software. |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| GPL - The GNU General Public License http://www.gnu.org/licenses/gpl.txt |
| Permits anyone the right to use and modify the software without limitations |
| as long as proper credits are given and the original and modified source |
| code are included. Requires that the final product, software derivate from |
| the original source or any software utilizing a GPL component, such as |
| this, is also licensed under the GPL license. |
|-----------------------------------------------------------------------------|
| 2002-10-14 | Original version released |
|-----------------------------------------------------------------------------|
| Created 2002-10-14 | All changes are in the log above. | Updated 2002-10-14 |
\----------------------------------------------------------------------------*/
function Range() {
this._value = 0;
this._minimum = 0;
this._maximum = 100;
this._extent = 0;
this._isChanging = false;
}
Range.prototype.setValue = function (value) {
value = parseInt(value);
if (isNaN(value)) return;
if (this._value != value) {
if (value + this._extent > this._maximum)
this._value = this._maximum - this._extent;
else if (value < this._minimum)
this._value = this._minimum;
else
this._value = value;
if (!this._isChanging && typeof this.onchange == "function")
this.onchange();
}
};
Range.prototype.getValue = function () {
return this._value;
};
Range.prototype.setExtent = function (extent) {
if (this._extent != extent) {
if (extent < 0)
this._extent = 0;
else if (this._value + extent > this._maximum)
this._extent = this._maximum - this._value;
else
this._extent = extent;
if (!this._isChanging && typeof this.onchange == "function")
this.onchange();
}
};
Range.prototype.getExtent = function () {
return this._extent;
};
Range.prototype.setMinimum = function (minimum) {
if (this._minimum != minimum) {
var oldIsChanging = this._isChanging;
this._isChanging = true;
this._minimum = minimum;
if (minimum > this._value)
this.setValue(minimum);
if (minimum > this._maximum) {
this._extent = 0;
this.setMaximum(minimum);
this.setValue(minimum)
}
if (minimum + this._extent > this._maximum)
this._extent = this._maximum - this._minimum;
this._isChanging = oldIsChanging;
if (!this._isChanging && typeof this.onchange == "function")
this.onchange();
}
};
Range.prototype.getMinimum = function () {
return this._minimum;
};
Range.prototype.setMaximum = function (maximum) {
if (this._maximum != maximum) {
var oldIsChanging = this._isChanging;
this._isChanging = true;
this._maximum = maximum;
if (maximum < this._value)
this.setValue(maximum - this._extent);
if (maximum < this._minimum) {
this._extent = 0;
this.setMinimum(maximum);
this.setValue(this._maximum);
}
if (maximum < this._minimum + this._extent)
this._extent = this._maximum - this._minimum;
if (maximum < this._value + this._extent)
this._extent = this._maximum - this._value;
this._isChanging = oldIsChanging;
if (!this._isChanging && typeof this.onchange == "function")
this.onchange();
}
};
Range.prototype.getMaximum = function () {
return this._maximum;
};