1 /*

     2 © Copyright 2008 Nokia Corporation. All rights reserved.

     3 

     4 IMPORTANT:  The Nokia software ("WRTKit and Example Widget files") is supplied to you by Nokia

     5 Corporation (“Nokia”) in consideration of your agreement to the following terms. Your use, installation

     6 and/or redistribution of the WRTKit and Example Widget files constitutes acceptance of these terms. If

     7 you do not agree with these terms, please do not use, install, or redistribute the WRTKit and Example

     8 Widget files.

     9 

    10 In consideration of your agreement to abide by the following terms, and subject to these terms, Nokia

    11 grants you a personal, non-exclusive license, under Nokia’s copyrights in the WRTKit and Example

    12 Widget files, to use, reproduce, and redistribute the WRTKit and Example files, in text form (for HTML,

    13 CSS, or JavaScript files) or binary form (for associated images), for the sole purpose of creating S60

    14 Widgets.

    15 

    16 If you redistribute the WRTKit and Example files, you must retain this entire notice in all such

    17 redistributions of the WRTKit and Example files.

    18 

    19 You may not use the name, trademarks, service marks or logos of Nokia to endorse or promote products

    20 that include the WRTKit and Example files without the prior written explicit agreement with Nokia.

    21 Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by

    22 Nokia herein, including but not limited to any patent rights that may be infringed by your products that

    23 incorporate the WRTKit and Example files or by other works in which the WRTKit and Example files

    24 may be incorporated.

    25 

    26 The WRTKit and Example files are provided on an "AS IS" basis.  NOKIA MAKES NO

    27 WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

    28 WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A

    29 PARTICULAR PURPOSE, REGARDING THE EXAMPLES OR ITS USE AND OPERATION

    30 ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

    31 

    32 IN NO EVENT SHALL NOKIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

    33 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    34 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    35 INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, AND/OR

    36 DISTRIBUTION OF THE EXAMPLES, HOWEVER CAUSED AND WHETHER UNDER THEORY

    37 OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE,

    38 EVEN IF NOKIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    39 

    40 */

    41 

    42 ///////////////////////////////////////////////////////////////////////////////

    43 // The SelectionControl class is an abstract base class for controls that lets

    44 // the user select one or more options from a list of options. Don't use

    45 // SelectionControl directly.

    46 

    47 // Constructor.

    48 function SelectionControl(id, caption, options, multipleSelection, selected) {

    49     if (id != UI_NO_INIT_ID) {

    50         this.init(id, caption, options, multipleSelection, selected);

    51     }

    52 }

    53 

    54 // SelectionControl inherits from Control.

    55 SelectionControl.prototype = new Control(UI_NO_INIT_ID);

    56 

    57 // List of options.

    58 SelectionControl.prototype.options = null;

    59 

    60 // The single selected option in single selection controls

    61 // or list of options in multi selection controls.

    62 SelectionControl.prototype.selected = null;

    63 

    64 // Single or multiple selection.

    65 SelectionControl.prototype.multipleSelection = false;

    66 

    67 // Initializer - called from constructor.

    68 SelectionControl.prototype.init = function(id, caption, options, multipleSelection, selected) {

    69     uiLogger.debug("SelectionControl.init(" + id + ", " + caption + ", " + options + ", " + multipleSelection + ", " + selected + ")");

    70     

    71     // call superclass initializer

    72     Control.prototype.init.call(this, id, caption);

    73     

    74     // set the multiple selection property

    75     this.multipleSelection = multipleSelection;

    76     

    77     // init options and selected (makes copies of the original arrays)

    78     this.options = (options != null) ? options.slice(0) : [];

    79     if (multipleSelection) {

    80         this.selected = (selected == null) ? [] : selected.slice(0);

    81     } else {

    82         this.selected = selected;

    83     }

    84     this.validateSelected();

    85 }

    86 

    87 // Returns true if the control is a multiple selection control; false if single.

    88 SelectionControl.prototype.isMultipleSelection = function() {

    89     return this.multipleSelection;

    90 }

    91 

    92 // Returns true if the specified option is selected; false if not.

    93 SelectionControl.prototype.isSelected = function(option) {

    94     if (this.multipleSelection) {

    95         // multiple selection

    96         // iterate through all selected options and look for the specified option

    97         for (var i = 0; i < this.selected.length; i++) {

    98             if (this.selected[i] == option) {

    99                 return true;

   100             }

   101         }

   102         return false;

   103     } else {

   104         // single selection

   105         return (this.selected == option);

   106     }

   107 }

   108 

   109 // Returns the currently selected option in a single selection control or

   110 // an array of selected options in a multiple selection control. If there are

   111 // no selected options a single selection control returns null and a multiple

   112 // selection control returns an empty array.

   113 SelectionControl.prototype.getSelected = function() {

   114     return this.multipleSelection ? this.selected.slice(0) : this.selected;

   115 }

   116 

   117 // Sets the currently selected options. Pass a single option in a single selection

   118 // control or an array of selected controls in a multiple selection control. To

   119 // deselect all options pass null in a single selection control and an empty array

   120 // in a multiple selection control.

   121 // Override in sublcasses to provide full implementation.

   122 SelectionControl.prototype.setSelected = function(selected) {

   123     this.selected = this.multipleSelection ? selected.slice(0) : selected;

   124     // make sure the selected option or options are legal

   125     this.validateSelected();

   126 }

   127 

   128 // Ensures that the selected option or options exist among the options in this control.

   129 SelectionControl.prototype.validateSelected = function() {

   130     if (this.multipleSelection) {

   131         // multiple selection

   132         // iterate through all selected options and ensure they exist among the options

   133         for (var i = 0; i < this.selected.length; i++) {

   134             // check that the selected option exists among the options

   135             var found = false;

   136             for (var j = 0; j < this.options.length; j++) {

   137                 if (this.options[j] == this.selected[i]) {

   138                     // found - stop looking for this option

   139                     found = true;

   140                     break;

   141                 }

   142             }

   143             // not found - remove this selected element

   144             if (!found) {

   145                 this.selected.splice(i, 1);

   146                 // since we removed an entry we must re-check this position

   147                 i--;

   148             }

   149         }

   150     } else {

   151         // single selection

   152         if (this.selected != null) {

   153             // check that the selected option exists among the options

   154             for (var i = 0; i < this.options.length; i++) {

   155                 if (this.options[i] == this.selected) {

   156                     // found - we're done

   157                     return;

   158                 }

   159             }

   160             // not found - remove the selection

   161             this.selected = null;

   162         }

   163     }

   164 }

   165 

   166 // Returns the options in the control as an array of option objects with

   167 // a value and text property.

   168 SelectionControl.prototype.getOptions = function() {

   169     return this.options;

   170 }

   171 

   172 // Sets the options in the control.

   173 // Override in sublcasses to provide full implementation.

   174 SelectionControl.prototype.setOptions = function(options) {

   175     this.options = options.slice(0);

   176     // make sure the selected option or options are legal

   177     this.validateSelected();

   178 }

   179 

   180 // Returns the option that has the specified value; null if none.

   181 SelectionControl.prototype.getOptionForValue = function(value) {

   182     // iterate through all options and look for a match

   183     for (var i = 0; i < this.options.length; i++) {

   184         if (this.options[i].value == value) {

   185             return this.options[i];

   186         }

   187     }

   188     return null;

   189 }