Toggle button visibility in AngularJS based on checkbox selection

I'm currently utilizing ng-table to construct my table. I have a button positioned at the top of the table that is initially disabled. My goal is to enable this button only when any of the checkboxes are selected. The button should automatically disable itself if no checkboxes are checked. Can someone provide guidance on how to achieve this functionality effectively?

Here is a snippet of my code:

HTML

<button class="btn btn-default pull-right" disabled >Remove Selected</button>

    <table ng-table="tableParams" show-filter="true" class="table ng-table-responsive">
        <tr ng-repeat="user in $data" ng-class="{ 'emphasis': user.money > 500 }">
            <td width="30" style="text-align: left" header="'ng-table/headers/checkbox.html'">
                <input type="checkbox" ng-model="checkboxes.items[user.id]" />
            </td>
            <td data-title="'Name'" filter="{ 'name': 'select' }" filter-data="names($column)">
                {{user.name}}
            </td>
            <td data-title="'Money'" sortable="'money'">
                {{user.money}}
            </td>
        </tr>
    </table>
<script type="text/ng-template" id="ng-table/headers/checkbox.html">
                <input type="checkbox" ng-model="checkboxes.checked" id="select_all" name="filter-checkbox" value="" />
              </script>

JS

var app = angular.module('main', ['ngTable']).
    controller('DemoCtrl', function($scope, $filter, $q, NgTableParams) {
        // Angular controller logic goes here, omitted for brevity
    })

Any helpful input would be greatly appreciated.

Answer №1

Utilize a ng-class to enable/disable functionality and ng-click to trigger the desired action. Remember to return false if disabled or when your checkbox count matches the total count based on your criteria.

I trust this explanation proves useful.

<button class="btn btn-default pull-right" ng-class="allFunction()" ng-click="allFunction('execute')">Remove Selected</button>

$scope.allFunction = function(action){
    if(action === 'execute'){
        if(!$scope.checkboxes.checked){
            return; // do nothing if class is disabled
        } else {
            if (!$scope.users) {
                return;
            }
            var checked = 0, unchecked = 0,
            var total = $scope.users.length;
            angular.forEach($scope.users, function(item) {
                checked += ($scope.checkboxes.items[item.id]) || 0;
                unchecked += (!$scope.checkboxes.items[item.id]) || 0;
            });
            if(checked > 0){
               // perform desired action here
            }
        }

    } else {
        // logic for ng-class attribute call
        return $scope.checkboxes.checked ? '' : 'disabled';
        // apply CSS to mimic a disabled button appearance
    }
}

Answer №2

Consider this example: http://example.com/checkboxes/

Assign the ng-checked attribute of the checkboxes to a $scope variable in order to link the "checked" status to the model. Next, create a function for the ng-disabled attribute of the button that will return a boolean value based on whether any of the checkboxes are currently checked. If at least one checkbox is checked, then the button will be enabled.

Answer №3

To effectively monitor an array of checkboxes, you should implement a Watch function in your code. This feature enables the system to continuously track changes in the checkboxes' statuses and update a variable accordingly. The Watch mechanism guarantees that the variable is updated every time digest is executed.

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