How to use ng-show and ng-hide with buttons in AngularJS - html

Question

I have two buttons Start and Stop,when I click the Start button I want the Stop button to show and the Start button to be hidden vice versa when I click the Stop button I want the Start button to be shown and the Stop button to be hidden.Only one button must be shown at any one time.Here is what I tried but it doesn't seem to work.Where am I going wrong?
<span ng-hide="Model.StartEvent == true">
<button ng-click="Model.StartEvent()" id="btnEventStart">Start</button>
</span>
<span ng-show="Model.StopEvent == false">
<button ng-click="Model.StopEvent()" id="btnStopEvent" class="tooltip">Stop</button>
</span>

Answer 1

You could do even less
<button ng-click="goEvent();" ng-hide="going">Start</button>
<button ng-click="goEvent();" ng-show="going">Stop</button>
...
$scope.going = false;
$scope.goEvent = function(){
$scope.going = !$scope.going;
if($scope.going){
$scope.go();
}else{
$scope.stop();
}
}

Answer 2

you should use same variable for both...
<button ng-click="Model.toggleShow(); Model.StartEvent()" ng-show="Model.showStartEvent">Start</button>
<button ng-click="Model.toggleShow(); Model.StopEvent()" ng-show="!Model.showStartEvent">Stop</button>
Modal.toggleShow = function(){
Model.showStartEvent = !Model.showStartEvent;
}
also you can call toggle right inside the startevent/stopevent rather than having two function calls on ng-click

Answer 3

Html:
<div ng-controller="YourController">
<span ng-hide="EventRunning"><button ng-click="StartEvent($event)"id="btnEventStart">Start</button></span>
<span ng-show="EventRunning"><button ng-click="StopEvent($event)" id="btnStopEvent">Stop</button></span>
</div>
Use single semaphore for hide and show EventRunning
Controller:
{ ...
$scope.EventRunning = false;
$scope.StartEvent = function (event) {
event.preventDefault();
$scope.EventRunning = true;
// your code
}
$scope.StopEvent = function (event) {
event.preventDefault();
$scope.EventRunning = false;
// your code
}
... }