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/*
* Ignatius Steven
* Tue, 14 Jan 2014 - 5:18:02 PM
*
* Angular JS Multi Select
* Creates a dropdown-like button with checkboxes. Accepts an array of object & modifies it based on the checkboxes status.
*
* Usage:
*
* <div
* multi-select
* input-model="input_list" *
* item-label="firstName lastName"
* item-ticker="selected"
* output-model="output_list"
* orientation="vertical"
* max-labels="4"
* max-height="500"
* is-disabled="false" >
* </div>
*
* or
*
* <multi-select
* ...
* ...
* </multi-select>
* (*** be careful with browser compatibility)
*
* Attributes:
*
* input-model (! REQUIRED !):
* $scope variable. Array of objects such as
* [
* { firstName: "John", lastName: "Robert" , ....., selected: false },
* { firstName: "Jane", lastName: "Angel" , ....., selected: true },
* { firstName: "Luke", lastName: "Skywalker" , ....., selected: true },
* { firstName: "John", lastName: "Wayne" , ....., selected: true }
* ]
*
* item-label (String) (! REQUIRED !)
* The object property that you want to display on the button & checkboxes. Separate multiple values by space.
* Example: item-label="firstName lastName"
*
* item-ticker (String) (! IMPORTANT !):
* Column name with a boolean value that represent the state of a checkbox.
* For example:
* item-ticker is "selected" -> if selected === true, checkbox will be ticked. If selected === false, checkbox will not be ticked.
* item-ticker is "isOn" -> if isOn === true, checkbox will be ticked. If isOn === false, checkbox will not be ticked.
* If not specified, the default will be "selected"
*
* output-model:
* $scope variable.
* If specified, will list all the selected checkboxes model ( eg. input-model.selected === true ).
*
* orientation (String - "vertical" | "horizontal")
* Orientation of the list of checkboxes.
* If not specified, the default will be "vertical".
*
* max-labels (String)
* Maximum number of items that will be displayed in the dropdown button. If not specified, will display all selected items.
* Example: "2" -> Using the input-model above, then button will display the first two selected: "Jane Angel, Luke Skywalker, ..."
*
* max-height (String)
* Maximum height of the list of checkboxes in pixels. Will show scrollbar on overflow.
* Example: "100".
*
* is-disabled (String - "true" | "false")
* Disable or enable the checkboxes.
* If not specified, the default will be "false".
*
*/
angular.module( 'multi-select', ['ng'] ).directive( 'multiSelect' , [ '$timeout', '$compile' , function ( $timeout, $compile ) {
return {
restrict:
'AE',
replace:
true,
scope:
{
inputModel : '=',
outputModel : '=',
itemLabel : '@',
itemTicker : '@',
orientation : '@',
maxLabels : '@',
maxHeight : '@',
isDisabled : '='
},
template:
'<span class="multiSelect inlineBlock">' +
'<button type="button" class="multiSelect button multiSelectButton" ng-click="toggleCheckboxes( $event ); refreshSelectedItems();">' +
'<div ng-if="selectedItems.length <= 0">None selected</div>' +
'<div ng-if="selectedItems.length > 0" ng-repeat="item in selectedItems | limitTo: varMaxLabels">' +
'<span ng-if="$index > 0">, </span>{{writeLabel( item )}}' +
'</div>' +
'<span ng-if="more">, ... [ Selected: {{selectedItems.length}} ]</span><span class="caret"></span>' +
'</button>' +
'<div class="multiSelect checkboxLayer hide" style="{{layerStyle}}">' +
'<div class="multiSelect line">' +
'Select: ' +
'<a ng-click="select( \'all\' )" class="multiSelect" >All</a> / ' +
'<a ng-click="select( \'none\' )" class="multiSelect" >None</a> / ' +
'<a ng-click="select( \'reset\' )" class="multiSelect" >Reset</a>' +
'</div>' +
'<div class="multiSelect line">' +
'Filter: <input class="multiSelect" type="text" ng-model="labelFilter" />' +
'<a class="multiSelect" ng-click="labelFilter=\'\'">Clear</a>' +
'</div>' +
'<div ng-repeat="item in inputModel | filter:labelFilter" ng-class="orientation" class="multiSelect">' +
'<label class="multiSelect" ng-class="{checkboxSelected:item[ itemSelector ]}">' +
'<input class="multiSelect" type="checkbox" ng-disabled="isDisabled" ng-checked="item[ itemSelector ]" ng-click="syncItems( item )" />' +
'{{writeLabel( item )}}' +
'</label> ' +
'</div>' +
'</div>' +
'</span>',
link: function ( $scope, element, attrs ) {
$scope.selectedItems = [];
$scope.backUp = [];
$scope.layerStyle = '';
$scope.varMaxLabels = 0;
$scope.syncItems = function( item ) {
item[ $scope.itemSelector ] = !item[ $scope.itemSelector ];
$scope.refreshSelectedItems();
}
$scope.refreshSelectedItems = function() {
$scope.selectedItems = [];
angular.forEach( $scope.inputModel, function( value, key ) {
if ( value[ $scope.itemSelector ] === true || value[ $scope.itemSelector ] === 'true' ) {
$scope.selectedItems.push( value );
}
});
// Push into output model
if ( typeof attrs.outputModel !== 'undefined' ) {
$scope.outputModel = angular.copy( $scope.selectedItems );
}
// If max amount of labels displayed..
if ( $scope.selectedItems.length > $scope.maxLabels ) {
$scope.more = true;
}
else {
$scope.more = false;
}
if ( typeof $scope.maxLabels === 'undefined' ) {
$scope.varMaxLabels = $scope.selectedItems.length;
}
else {
$scope.varMaxLabels = $scope.maxLabels;
}
}
$scope.toggleCheckboxes = function( e ) {
$scope.labelFilter = '';
var multiSelectIndex = -1;
var checkboxes = document.querySelectorAll( '.checkboxLayer' );
var multiSelectButtons = document.querySelectorAll( '.multiSelectButton' );
for( i=0; i < multiSelectButtons.length; i++ ) {
if ( e.target == multiSelectButtons[ i ] ) {
multiSelectIndex = i;
break;
}
}
for( i=0; i < checkboxes.length; i++ ) {
if ( i != multiSelectIndex ) {
checkboxes[i].className = 'multiSelect checkboxLayer hide';
}
}
if ( checkboxes[ multiSelectIndex ].className == 'multiSelect checkboxLayer hide' ) {
checkboxes[ multiSelectIndex ].className = 'multiSelect checkboxLayer show';
}
else if ( checkboxes[ multiSelectIndex ].className == 'multiSelect checkboxLayer show' ) {
checkboxes[ multiSelectIndex ].className = 'multiSelect checkboxLayer hide';
}
}
$scope.select = function( type ) {
switch( type.toUpperCase() ) {
case 'ALL':
angular.forEach( $scope.inputModel, function( value, key ) {
value[ $scope.itemSelector ] = true;
});
break;
case 'NONE':
angular.forEach( $scope.inputModel, function( value, key ) {
value[ $scope.itemSelector ] = false;
});
break;
case 'RESET':
$scope.inputModel = angular.copy( $scope.backUp );
break;
default:
}
$scope.refreshSelectedItems();
}
$scope.writeLabel= function( item ) {
var label = '';
angular.forEach( item, function( value1, key1 ) {
var temp = $scope.itemLabel.split( ' ' );
angular.forEach( temp, function( value2, key2 ) {
if ( key1 == value2 ) {
label += ' ' + value1;
}
});
});
return label;
}
angular.element( document ).bind( 'click' , function( e ) {
var checkboxes = document.querySelectorAll( '.checkboxLayer' );
if ( e.target.className.indexOf( 'multiSelect' ) === -1 ) {
for( i=0; i < checkboxes.length; i++ ) {
checkboxes[i].className = 'multiSelect checkboxLayer hide';
}
$scope.$apply();
e.stopPropagation();
}
});
// Start
$scope.itemSelector = ( typeof $scope.itemTicker === 'string' ? $scope.itemTicker : 'selected' );
$scope.refreshSelectedItems();
// Watch for changes in input model
$scope.$watch( 'inputModel' , function( newVal ) {
$scope.refreshSelectedItems();
$scope.backUp = angular.copy( $scope.inputModel );
});
$scope.$watch( 'isDisabled' , function( newVal ) {
$scope.isDisabled = newVal;
});
if ( typeof $scope.maxHeight !== 'undefined' ) {
$scope.layerStyle = 'max-height:' + $scope.maxHeight + 'px; overflow: auto; min-width: auto';
}
}
}
}]);
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