Appendix: complete code for all projects

Project 1. Does the image contain a certain object?

Specifications:

{
  "image": {
    "type": "url",
    "hidden": false,
    "required": true
  }
}

{
  "result": {
    "type": "string",
    "hidden": false,
    "required": true
  }
}

{
  "image": {
    "type": "url",
    "hidden": false,
    "required": true
  }
}

{
  "result": {
    "type": "string",
    "hidden": false,
    "required": true
  }
}

HTML:

{{img src=image width="100%" height="400px"}}
<div>Is there a <b>traffic sign</b> in the picture?<div>
<div> {{field type="radio" name="result" value="OK" label="Yes" hotkey="1"}}
{{field type="radio" name="result" value="BAD" label="No" hotkey="2"}}
{{field type="radio" name="result" value="404" label="Loading error" hotkey="3"}}</div>

JavaScript:

exports.Task = extend(TolokaHandlebarsTask, function(options) {
    TolokaHandlebarsTask.call(this, options);
}, {
    onRender: function() {
        // DOM element for task is formed (available via #getDOMElement())
    },
    onDestroy: function() {
        // Task is completed. Global resources can be released (if used)
    }
});

function extend(ParentClass, constructorFunction, prototypeHash) {
    constructorFunction = constructorFunction || function() {};
    prototypeHash = prototypeHash || {};
    if (ParentClass) {
        constructorFunction.prototype = Object.create(ParentClass.prototype);
    }
    for (var i in prototypeHash) {
        constructorFunction.prototype[i] = prototypeHash[i];
    }
    return constructorFunction;
}

Project 2. Select an object in the image

Specifications:

{
  "image": {
    "type": "url",
    "hidden": false,
    "required": true
  }
}

{
  "result": {
    "type": "string",
    "hidden": false,
    "required": true
  }
}

{
  "image": {
    "type": "url",
    "hidden": false,
    "required": true
  }
}

{
  "result": {
    "type": "string",
    "hidden": false,
    "required": true
  }
}

HTML:

{{field type="image-annotation" name="result" src=image}}

JavaScript:

1. Connect the $TOLOKA_ASSETS/js/image-annotation.js library (click in the Task interface block on the project page).

2. exports.Task = extend(TolokaHandlebarsTask, function (options) {
     TolokaHandlebarsTask.call(this, options);
   }, {
     onRender: function() {
       // DOM element for task is formed (available via #getDOMElement())
     },
     onDestroy: function() {
       // Task is completed. Global resources can be released (if used)
     }
   });
   
   function extend(ParentClass, constructorFunction, prototypeHash) {
     constructorFunction = constructorFunction || function () {};
     prototypeHash = prototypeHash || {};
     if (ParentClass) {
       constructorFunction.prototype = Object.create(ParentClass.prototype);
     }
     for (var i in prototypeHash) {
       constructorFunction.prototype[i] = prototypeHash[i];
     }
     return constructorFunction;
   }
   

CSS:

.image-annotation-editor__shape-polygon {
display: none;
}
.image-annotation-editor__annotation-layer {
height: max-content;
}

Project 3. Are the bounding boxes correct?

Specifications:

{
  "image": {
    "type": "url",
    "hidden": false,
    "required": true
  },
  "selection": {
    "type": "json",
    "hidden": false,
    "required": false
  },
  "assignment_id": {
    "type": "string",
    "hidden": true,
    "required": true
  }
}

{
  "result": {
    "type": "string",
    "hidden": false,
    "required": true
  }
}

{
  "image": {
    "type": "url",
    "hidden": false,
    "required": true
  },
  "selection": {
    "type": "json",
    "hidden": false,
    "required": false
  },
  "assignment_id": {
    "type": "string",
    "hidden": true,
    "required": true
  }
}

{
  "result": {
    "type": "string",
    "hidden": false,
    "required": true
  }
}

HTML:

{{field type="image-annotation" name="object" annotations=selection}}
 {{field type="radio" name="result" value="OK" label="Correct" hotkey="1"}}
  {{field type="radio" name="result" value="BAD" label="Incorrect" hotkey="2"}}

JavaScript:

exports.Task = extend(TolokaHandlebarsTask, function(options) {
    TolokaHandlebarsTask.call(this, options);
}, {
    onRender: function() {
        // DOM element for task is formed (available via #getDOMElement())
    },
    onDestroy: function() {
        // Task is completed. Global resources can be released (if used)
    }
});

function extend(ParentClass, constructorFunction, prototypeHash) {
    constructorFunction = constructorFunction || function() {};
    prototypeHash = prototypeHash || {};
    if (ParentClass) {
        constructorFunction.prototype = Object.create(ParentClass.prototype);
    }
    for (var i in prototypeHash) {
        constructorFunction.prototype[i] = prototypeHash[i];
    }
    return constructorFunction;
}

/* disable polygon-editor controls */
.image-annotation-editor__shape-polygon {
  display: none;
}
.image-annotation-editor__annotation-layer {
  height: max-content;
}