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javery-free-sort-my-text.js
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javery-free-sort-my-text.js
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/**
* jspsych-free-sort
* plugin for drag-and-drop sorting of a collection of images
* Josh de Leeuw
*
* documentation: docs.jspsych.org
*/
jsPsych.plugins['free-sort-my-text'] = (function() {
var plugin = {};
jsPsych.pluginAPI.registerPreload('free-sort', 'stimuli', 'image');
plugin.info = {
name: 'free-sort',
description: '',
parameters: {
stimuli: {
type: jsPsych.plugins.parameterType.STRING,
pretty_name: 'Stimuli',
default: undefined,
array: true,
description: 'Images to be displayed.'
},
stim_height: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Stimulus height',
default: 30,
description: 'Height of images in pixels.'
},
stim_width: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Stimulus width',
default: 100,
description: 'Width of images in pixels'
},
sort_area_height: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Sort area height',
default: 400,
// default: 800,
description: 'The height of the container that subjects can move the stimuli in.'
},
sort_area_width: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Sort area width',
default: 600,
description: 'The width of the container that subjects can move the stimuli in.'
},
full_area_height: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Sort area height',
default: 400,
description: 'The height of the container that subjects can move the stimuli in.'
},
full_area_width: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Sort area width',
default: 800,
description: 'The width of the container that subjects can move the stimuli in.'
},
prompt: {
type: jsPsych.plugins.parameterType.STRING,
pretty_name: 'Prompt',
default: null,
description: 'It can be used to provide a reminder about the action the subject is supposed to take.'
},
prompt_location: {
type: jsPsych.plugins.parameterType.SELECT,
pretty_name: 'Prompt location',
options: ['above','below'],
default: 'above',
description: 'Indicates whether to show prompt "above" or "below" the sorting area.'
},
button_label: {
type: jsPsych.plugins.parameterType.STRING,
pretty_name: 'Button label',
default: 'Continue',
description: 'The text that appears on the button to continue to the next trial.'
},
order:{
type: jsPsych.plugins.parameterType.STRING,
pretty_name: 'order of appearance',
default: '',
description: 'order of appearance in test.'
},
trail_label: {
type: jsPsych.plugins.parameterType.STRING,
pretty_name: 'Button label',
default: 'Continue',
description: 'Label of the button.'
}
}
}
plugin.trial = function(display_element, trial) {
var start_time = performance.now();
var html = "";
// check if there is a prompt and if it is shown above
if (trial.prompt !== null && trial.prompt_location == "above") {
html += trial.prompt;
}
html += '<div '+
'id="jspsych-free-sort-arena-with-text" '+
'class="jspsych-free-sort-arena" '+
'style="position: relative; '+
'background: darkgrey;'+
'width:'+trial.full_area_width+'px;'+
'height:'+trial.full_area_height+'px;'+
'margin: 10px 0px 10px 0px;"'+
'></div>';
// check if prompt exists and if it is shown below
if (trial.prompt !== null && trial.prompt_location == "below") {
html += trial.prompt;
}
display_element.innerHTML = html;
display_element.querySelector('#jspsych-free-sort-arena-with-text').innerHTML += '<div '+
'id="jspsych-free-sort-arena" '+
'class="jspsych-free-sort-arena" '+
'style="position: relative;'+
'background: white;'+
'width:'+trial.sort_area_width+'px;'+
'height:'+trial.sort_area_height+'px;'+
'border:2px solid #444;"'+
'></div>';
// store initial location data
var init_locations = [];
for (var i = 0; i < trial.stimuli.length; i++) {
var coords = initial_coordinate(i, trial.stim_height);
display_element.querySelector("#jspsych-free-sort-arena").innerHTML +=
'<div class="jspsych-free-sort-draggable" '+
'unselectable="on";'+
'src="'+trial.stimuli[i]+'" '+
'onselectstart="return false;"'+
'draggable="false" '+
'style="position: absolute;'+
' cursor: move;'+
' font-family: helvetica;'+
' width:'+getTextWidth(trial.stimuli[i], "18px helvetica")+'px;'+ //add some cushion so don't get re-wrapping
' height:'+trial.stim_height+'px;'+
' top:'+coords.y+'px;'+
' left:'+coords.x+'px;'+
' color: black;'+
' user-select: none;">'
+trial.stimuli[i]+
'</div>';
init_locations.push({
"word": trial.stimuli[i],
"x": coords.x,
"y": coords.y
});
}
// display_element.innerHTML += '<button id="jspsych-free-sort-done-btn" class="jspsych-btn">'+trial.button_label+'</button>';
display_element.innerHTML += '<button id="jspsych-free-sort-done-btn" class="jspsych-btn" value="disable" disabled>'+trial.button_label+'</button>';
var maxz = 1;
var moves = [];
var draggables = display_element.querySelectorAll('.jspsych-free-sort-draggable');
for(var i=0;i<draggables.length; i++){
draggables[i].addEventListener('mousedown', function(event){
var x = event.pageX - event.currentTarget.offsetLeft;
var y = event.pageY - event.currentTarget.offsetTop - window.scrollY;
var elem = event.currentTarget;
elem.style.zIndex = ++maxz;
var mousemoveevent = function(e){
elem.style.top = Math.min(trial.sort_area_height - trial.stim_height, Math.max(0,(e.clientY - y))) + 'px';
elem.style.left = Math.min(trial.sort_area_width - elem.offsetWidth, Math.max(0,(e.clientX - x))) + 'px';
// if all elements are withing boundary, enable continue button!
// get all draggable elements
var new_draggable_positions = display_element.querySelectorAll('.jspsych-free-sort-draggable');
// console.log(new_draggable_positions[0].offsetLeft);
var x_vals = [];
// get the x values for each draggable
for(var j = 0; j < new_draggable_positions.length; j++){
x_vals.push(parseInt(new_draggable_positions[j].offsetLeft));
}
// console.log(Math.max.apply(Math,x_vals))
// get max x val
var max_x = Math.max.apply(Math,x_vals);
// console.log(max_x)
// if max x val is less than width of bounded area, activate button
if (max_x < trial.sort_area_width) {
document.getElementById("jspsych-free-sort-done-btn").disabled = false;
}
}
document.addEventListener('mousemove', mousemoveevent);
var mouseupevent = function(e){
document.removeEventListener('mousemove', mousemoveevent);
moves.push({
"word": elem.textContent,
// "src": elem.dataset.src,
"x": elem.offsetLeft,
"y": elem.offsetTop
});
document.removeEventListener('mouseup', mouseupevent);
}
document.addEventListener('mouseup', mouseupevent);
});
}
display_element.querySelector('#jspsych-free-sort-done-btn').addEventListener('click', function(){
var end_time = performance.now();
var rt = end_time - start_time;
// gather data
// get final position of all objects
var final_locations = [];
var matches = display_element.querySelectorAll('.jspsych-free-sort-draggable');
for(var i=0; i<matches.length; i++){
final_locations.push({
"word": matches[i].textContent,
"x": parseInt(matches[i].style.left),
"y": parseInt(matches[i].style.top)
});
}
var trial_data = {
"init_locations": JSON.stringify(init_locations),
"moves": JSON.stringify(moves),
"final_locations": JSON.stringify(final_locations),
"rt": rt,
'order': trial.order,
'trial_label': trial.trial_label
};
// advance to next part
display_element.innerHTML = '';
jsPsych.finishTrial(trial_data);
});
};
// helper functions
function random_coordinate(max_width, max_height) {
var rnd_x = Math.floor(Math.random() * (max_width - 1));
var rnd_y = Math.floor(Math.random() * (max_height - 1));
return {
x: rnd_x,
y: rnd_y
};
}
function initial_coordinate(num, height) {
var rnd_x = 610;
var rnd_y = num * height;
return {
x: rnd_x,
y: rnd_y
};
}
function getTextWidth(text, font) {
// re-use canvas object for better performance
var canvas = getTextWidth.canvas || (getTextWidth.canvas = document.createElement("canvas"));
var context = canvas.getContext("2d");
context.font = font;
var metrics = context.measureText(text);
return metrics.width + 5;
}
return plugin;
})();