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selection = []
visited = []
current = 0
playing = 1
document.addEventListener('keyup', function(event) {
if(event.keyCode == 37) { prev() } // left
else if(event.keyCode == 39) { next() } // right
else if(event.keyCode == 32) {
toggle_play()
} // space
else if(event.keyCode == 13) { new_selection() } // enter
});
function new_selection() {
images = Object.keys(distances)
start = images[Math.floor(Math.random()*images.length)]
sortable = []
for (file in distances[start]) {
if (visited.indexOf(file) == -1) { // not in visited
sortable.push([file,distances[start][file]]) // objects cannot be sorted in js, use array instead
}
}
n = 6
selection = []
sorted = sortable.sort(function(a, b) { return a[1] - b[1]; }).slice(0,n); // sort by distance, get first n elements
sorted.forEach(function(img,index) {
selection.push(img[0])
visited.push(img[0])
})
selection = selection.sort(() => Math.random() - 0.5); // shuffle
current = 0
update()
}
function src(id,path) { document.getElementById(id).src = path }
function onclick(id,fun) { document.getElementById(id).onclick = fun }
function hide_controls() {
document.getElementById("prev").style.display = "none"
document.getElementById("next").style.display = "none"
}
function show_controls() {
document.getElementById("prev").style.display = "block"
document.getElementById("next").style.display = "block"
}
function toggle_play() { playing == 1 ? stop() : play() }
function play() {
playing = 1
interval = setInterval(function () { next() }, 3000);
document.getElementById("play-indicator").title = "Pause slideshow"
document.getElementById("play-indicator").className = "fa fa-pause"
hide_controls()
}
function stop() {
playing = 0
clearInterval(interval)
document.getElementById("play-indicator").title = "Play slideshow"
document.getElementById("play-indicator").className = "fa fa-play"
show_controls()
}
function prev() {
current = (current-1+selection.length) % selection.length // js % cannot handle negative values
update()
}
function next() {
current = (current+1) % selection.length
update()
}
function update() {
src('image',"https://media.pdp8.info/pictures/"+selection[current])
}
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