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 UIElement class is the base class for all user interface elements.

    44 

    45 // Constructor.

    46 function UIElement(id) {

    47     if (id != UI_NO_INIT_ID) {

    48         this.init(id);

    49     }

    50 }

    51 

    52 // UI element identifier.

    53 UIElement.prototype.id = null;

    54 

    55 // Root HTML element in the UI element.

    56 UIElement.prototype.rootElement = null;

    57 

    58 // Initializer for UIElement.

    59 UIElement.prototype.init = function(id) {

    60     uiLogger.debug("UIElement.init(" + id + ")");

    61     

    62     // copy identifier

    63     this.id = id;

    64     

    65     // init event listener array

    66     this.eventListeners = [];

    67     

    68     // create the root element

    69     this.rootElement = document.createElement("div");

    70     if (id != null) {

    71         this.rootElement.id = id;

    72     }

    73 }

    74 

    75 // Returns an array containing the current event listeners.

    76 UIElement.prototype.getEventListeners = function() {

    77     return this.eventListeners;

    78 }

    79 

    80 // Adds an event listener.

    81 UIElement.prototype.addEventListener = function(eventType, listener) {

    82     var listenerDef = { type: eventType, listener: listener };

    83     this.eventListeners.push(listenerDef);

    84 }

    85 

    86 // Removes an event listener.

    87 UIElement.prototype.removeEventListener = function(eventType, listener) {

    88     // iterate through current listeners and remove the specified

    89     // listener when its found

    90     for (var i = 0; i < this.eventListeners.length; i++) {

    91         var listenerDef = this.eventListeners[i];

    92         if ((listenerDef.type == eventType) &&

    93                 (listenerDef.listener == listener)) {

    94             this.eventListeners.splice(i, 1);

    95             return;

    96         }

    97     }

    98 }

    99 

   100 // Factory method for an event object where this object is the source object.

   101 UIElement.prototype.createEvent = function(type, value) {

   102     return { source: this, type: type, value: value };

   103 }

   104 

   105 // Fires an event to all listeners.

   106 UIElement.prototype.fireEvent = function(event) {

   107     // iterate through all event listeners and notify them of the event

   108     for (var i = 0; i < this.eventListeners.length; i++) {

   109         var listenerDef = this.eventListeners[i];

   110         if (listenerDef.type == null || listenerDef.type == event.type) {

   111             listenerDef.listener.call(this, event);

   112         }

   113     }

   114 }