Učinkovit način za prikaz slik in medijev

Lightbox je priljubljena tehnika uporabniškega vmesnika, ki omogoča, da slike, videoposnetki ali drugi mediji na spletni strani izstopijo v ospredje na zaslonu, hkrati pa zatemni preostanek strani. Uporablja se predvsem za poudarjanje in povečanje vsebine brez potrebe po zapuščanju trenutne strani.

PRIMER

                        <!DOCTYPE html>
<html lang="sl">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <link rel="stylesheet" href="style.css">
    <script src="script.js" defer></script>
</head>
<body>
    <div class="gallery" role="region" aria-label="Galerija slik">
        <div class="gallery-item" tabindex="0">
            <img src="/img/narava1.png" alt="Jesenski gozd" loading="lazy">
        </div>
        <div class="gallery-item" tabindex="0">
            <img src="/img/narava3.png" alt="Gorski potok" loading="lazy">
        </div>
        <div class="gallery-item" tabindex="0">
            <img src="/img/narava6.png" alt="Sončni zahod" loading="lazy">
        </div>
        <div class="gallery-item" tabindex="0">
            <img src="/img/narava9.png" alt="Pomladni travnik" loading="lazy">
        </div>
    </div>

    <div class="lightbox" role="dialog" aria-label="Lightbox galerija">
        <button class="lightbox-close" aria-label="Zapri galerijo">&times;</button>
        <div class="lightbox-content">
            <div class="main-image-container">
                <button class="lightbox-controls lightbox-prev" aria-label="Prejšnja slika">&#10094;</button>
                <img class="lightbox-image" src="" alt="" loading="lazy">
                <button class="lightbox-controls lightbox-next" aria-label="Naslednja slika">&#10095;</button>
                <div class="lightbox-caption"></div>
            </div>
            <div class="thumbnails" role="tablist"></div>
        </div>
    </div>
</body>
</html>
        
                    

                        .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    cursor: pointer;
    border-radius: 8px;
    overflow: hidden;
    filter: grayscale(0.6);
    transition: all 0.3s ease;
}

.gallery-item:hover {
    filter: grayscale(0);
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Lightbox stilski elementi */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.main-image-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    position: relative;
    margin-bottom: 20px;
}

.lightbox-image {
    max-width: 100%;
    max-height: 70vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 0 20px rgba(0,0,0,0.3);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* Thumbnail galerija */
.thumbnails {
    display: flex;
    gap: 10px;
    padding: 10px;
    overflow-x: auto;
    max-width: 100%;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.3) transparent;
}

.thumbnail {
    width: 100px;
    height: 70px;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0.6;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    object-fit: cover;
}

.thumbnail:hover {
    opacity: 1;
}

.thumbnail.active {
    opacity: 1;
    border-color: #fff;
}

/* Kontrolni gumbi */
.lightbox-controls button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white !important;
    padding: 15px 20px;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s;
    z-index: 2;
}

/* Skupne lastnosti za oba gumba */
.lightbox-prev,
.lightbox-next {
    background-color: transparent;
    border: none !important;
    color: white !important;
    font-size: 30px;
    padding: 15px 25px;
    transition: all 0.3s ease;
    opacity: 1;
}

/* Specifične pozicije */
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* Skupni hover efekti */
.lightbox-prev:hover,
.lightbox-next:hover {
    opacity: 1;
    cursor: pointer;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white !important;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    transition: all 0.3s;
    z-index: 2;
}

.lightbox-close:hover {
    background: rgba(255, 0, 0, 0.5);
    transform: rotate(90deg);
}

.lightbox-caption {
    color: white;
    text-align: center;
    padding: 10px;
    font-size: 1.1em;
    position: absolute;
    bottom: 100px;
    left: 0;
    right: 0;
}

/* Odzivno oblikovanje za mobilne naprave */
@media (max-width: 768px) {
    .gallery {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 10px;
    }

    .main-image-container {
        width: 100%;
        padding: 0 40px;
    }

    .lightbox-image {
        max-height: 50vh;
        max-width: 100%;
    }
    
    .lightbox-prev { left: 5px; }
    .lightbox-next { right: 5px; }

    .thumbnails {
        gap: 5px;
    }

    .thumbnail {
        width: 80px;
        height: 60px;
    }

    .lightbox-controls button {
        padding: 10px 15px;
    }

    .lightbox-caption {
        font-size: 14px;
        bottom: 80px;
    }
}

@media (max-width: 480px) {
    .lightbox-content {
        padding: 10px;
        overflow: hidden;
    }

    .main-image-container {
        padding: 0;
    }

    .lightbox-image {
        max-width: 95vw;
        max-height: 45vh;
        object-fit: contain;
    }

    .lightbox-controls button {
        background: rgba(0, 0, 0, 0.3);
        padding: 8px 12px;
    }
}
        
                    

                        class Lightbox {
    constructor() {
        this.images = Array.from(document.querySelectorAll('.gallery-item img'));
        this.lightbox = document.querySelector('.lightbox');
        this.lightboxImg = document.querySelector('.lightbox-image');
        this.caption = document.querySelector('.lightbox-caption');
        this.thumbnailsContainer = document.querySelector('.thumbnails');
        this.currentIndex = 0;
        
        // DODANO: Začetne vrednosti za swipe
        this.touchStartX = 0;
        this.touchEndX = 0;
        
        this.createThumbnails();
        this.initializeEvents();
    }

    createThumbnails() {
        this.thumbnailsContainer.innerHTML = '';
        this.images.forEach((img, index) => {
            const thumb = document.createElement('img');
            thumb.src = img.src;
            thumb.alt = `Sličica: ${img.alt}`;
            thumb.classList.add('thumbnail');
            thumb.setAttribute('role', 'tab');
            thumb.addEventListener('click', () => this.showImage(index));
            this.thumbnailsContainer.appendChild(thumb);
        });
    }

    initializeEvents() {
        // Klik na slike v galeriji
        this.images.forEach((img, index) => {
            img.parentElement.addEventListener('click', () => this.openLightbox(index));
            img.parentElement.addEventListener('keydown', (e) => {
                if (e.key === 'Enter') this.openLightbox(index);
            });
        });

        // Kontrolni gumbi
        document.querySelector('.lightbox-close').addEventListener('click', () => this.closeLightbox());
        document.querySelector('.lightbox-prev').addEventListener('click', () => this.navigate(-1));
        document.querySelector('.lightbox-next').addEventListener('click', () => this.navigate(1));

        // Tipkovnica
        document.addEventListener('keydown', (e) => {
            if (!this.lightbox.classList.contains('active')) return;
            
            switch(e.key) {
                case 'Escape': this.closeLightbox(); break;
                case 'ArrowLeft': this.navigate(-1); break;
                case 'ArrowRight': this.navigate(1); break;
            }
        });

        // DODANO: Podpora za podrs (swipe) na mobilnikih
        this.lightbox.addEventListener('touchstart', (e) => {
            this.touchStartX = e.changedTouches[0].screenX;
        }, { passive: true });

        this.lightbox.addEventListener('touchend', (e) => {
            this.touchEndX = e.changedTouches[0].screenX;
            this.handleSwipe();
        }, { passive: true });

        // Zapiranje ob kliku izven slike
        this.lightbox.addEventListener('click', (e) => {
            if (e.target === this.lightbox) this.closeLightbox();
        });
    }
    
    handleSwipe() {
        const threshold = 50; // Minimalna dolžina podrsa v pikslih
        if (this.touchEndX < this.touchStartX - threshold) {
            this.navigate(1); // Podrs v levo -> naslednja slika
        }
        if (this.touchEndX > this.touchStartX + threshold) {
            this.navigate(-1); // Podrs v desno -> prejšnja slika
        }
    }

    openLightbox(index) {
        this.currentIndex = index;
        this.updateImage();
        this.lightbox.classList.add('active');
        document.body.style.overflow = 'hidden';
    }

    closeLightbox() {
        this.lightbox.classList.remove('active');
        document.body.style.overflow = '';
    }

    navigate(direction) {
        this.currentIndex = (this.currentIndex + direction + this.images.length) % this.images.length;
        this.updateImage();
    }

    showImage(index) {
        this.currentIndex = index;
        this.updateImage();
    }

    updateImage() {
        const currentImg = this.images[this.currentIndex];
        this.lightboxImg.src = currentImg.src;
        this.lightboxImg.alt = currentImg.alt;
        this.caption.textContent = currentImg.alt;

        // Posodobi aktivno sličico
        const thumbnails = this.thumbnailsContainer.querySelectorAll('.thumbnail');
        thumbnails.forEach((thumb, index) => {
            thumb.classList.toggle('active', index === this.currentIndex);
        });
    }
}

// Inicializacija ob nalaganju strani
document.addEventListener('DOMContentLoaded', () => new Lightbox());
        
                    

REZULTAT

Lightbox: Elegantna predstavitev slik in medijev