Catch the moment when user takes a snap

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steaq

Official Lens Creator Lens Studio Team

• May 07, 2019 11:22

I must hide some UI elements the frame before the user takes a snap. To achieve this I need a sort of event firing and register a listener (or any other mechanisms). I was expecting this to be available as a SceneEvent among the ones listed here or as a Camera callback but it isn't?

So is there a way to catch the moment when the user takes a snap to execute some code just before the snap is actually taken?

1

• 

  Brandon / Apoc

  Official Lens Creator Lens Studio Team

  • May 12, 2019 01:23

  This is possible using one of the global methods.

  global.scene has an isRecording() method that returns true when the user takes/is taking a video or a picture. If you put it in an update event it will fire the moment they take the picture.

  https://lensstudio.snapchat.com/api/classes/ScriptScene/

   

  ```

  function runOnPic(){
    // code to run when user takes a picture
  }
  
  var event = script.createEvent("UpdateEvent");
  event.bind(function (eventData)
  {
    if(global.scene.isRecording()){
       runOnPic()
     }
  });

   

  ```

   

   

   

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• 

  Brandon / Apoc

  Official Lens Creator Lens Studio Team

  • May 12, 2019 01:23

  This is possible using one of the global methods.

  global.scene has an isRecording() method that returns true when the user takes/is taking a video or a picture. If you put it in an update event it will fire the moment they take the picture.

  https://lensstudio.snapchat.com/api/classes/ScriptScene/

   

  function runOnPic(){
    // code to run when user takes a picture
  }
  
  var event = script.createEvent("UpdateEvent");
  event.bind(function (eventData)
  {
    if(global.scene.isRecording()){
       runOnPic()
     }
  });

   

   

   

   

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• 

  Jonathan Solichin

  Official Lens Creator Lens Studio Team

  • May 13, 2019 17:13

  Hi Steaq,

  Yep, you can do this by checking global.scene.isRecording() on update and calling your functions if it's true. 

  For example:

  // -----JS CODE-----
  // @input SceneObject target
  
  if (global.scene.isRecording()) {
  script.target.enabled = false;
  }

   

  Let me know if you need any clarification! Can't wait to see what you come up with.

   

  Cheers,

  Jon

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