My controller contains data with various actions and different numbers of parameters:
$scope.actions = [
{name : 'rotate', r : '30'},
{name : 'translate', x : '10', y : '10'},
{name : 'scale', x : '10', y' : 10},
]
For example, rotate has one parameter, while translate and scale have two. I want to display a dropdown menu for each action in the list, and then based on the selected action, show text input fields for each parameter that action requires. How can I achieve this in Angular?
If you have a limited number of unique name values, you can consider using ng-switch:
<select ng-model="selectedAction" ng-options="action.name for action in actions">
<option value="">Select an Action</option>
</select>
<div ng-switch="selectedAction.name">
<div ng-switch-when="rotate">
<div><label>r: </label><input ng-model="selectedAction.r"></div>
</div>
<div ng-switch-when="translate">
<div><label>x: </label><input ng-model="selectedAction.x"></div>
<div><label>y: </label><input ng-model="selectedAction.y"></div>
</div>
<div ng-switch-when="scale">
<div><label>x: </label><input ng-model="selectedAction.x"></div>
<div><label>y: </label><input ng-model="selectedAction.y"></div>
</div>
</div>
To simplify the process, consider utilizing templates in conjunction with ng-include
Begin by creating three templates, each corresponding to a dropdown value, like so:
<script type="text/ng-template" id="rotate">
<div>Angle</div> <input type='text' ng-model='r'/>
</script>
Ensure that the template name matches the selected element name
Then, include the template using ng-include:
<ng-include src ="selectedAction.name"></ng-include>
Within your controller code, establish a selectedAction variable on the scope, updating it whenever a selection is made.
As the selectedAction property changes, the corresponding template will be loaded based on the selected action.
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