<template> <div class="p-galleria-thumbnail-wrapper"> <div class="p-galleria-thumbnail-container"> <button v-if="showThumbnailNavigators" v-ripple :class="navBackwardClass" :disabled="isNavBackwardDisabled()" type="button" :aria-label="ariaPrevButtonLabel" @click="navBackward($event)" v-bind="prevButtonProps"> <component :is="templates.previousthumbnailicon || (isVertical ? 'ChevronUpIcon' : 'ChevronLeftIcon')" class="p-galleria-thumbnail-prev-icon" /> </button> <div class="p-galleria-thumbnail-items-container" :style="{ height: isVertical ? contentHeight : '' }"> <div ref="itemsContainer" class="p-galleria-thumbnail-items" role="tablist" @transitionend="onTransitionEnd" @touchstart="onTouchStart($event)" @touchmove="onTouchMove($event)" @touchend="onTouchEnd($event)"> <div v-for="(item, index) of value" :key="`p-galleria-thumbnail-item-${index}`" :class="[ 'p-galleria-thumbnail-item', { 'p-galleria-thumbnail-item-current': activeIndex === index, 'p-galleria-thumbnail-item-active': isItemActive(index), 'p-galleria-thumbnail-item-start': firstItemAciveIndex() === index, 'p-galleria-thumbnail-item-end': lastItemActiveIndex() === index } ]" role="tab" :aria-selected="activeIndex === index" :aria-controls="containerId + '_item_' + index" @keydown="onThumbnailKeydown($event, index)" > <div class="p-galleria-thumbnail-item-content" :tabindex="activeIndex === index ? '0' : '-1'" :aria-label="ariaPageLabel(index + 1)" :aria-current="activeIndex === index ? 'page' : undefined" @click="onItemClick(index)"> <component v-if="templates.thumbnail" :is="templates.thumbnail" :item="item" /> </div> </div> </div> </div> <button v-if="showThumbnailNavigators" v-ripple :class="navForwardClass" :disabled="isNavForwardDisabled()" type="button" :aria-label="ariaNextButtonLabel" @click="navForward($event)" v-bind="nextButtonProps"> <component :is="templates.nextthumbnailicon || (isVertical ? 'ChevronDownIcon' : 'ChevronRightIcon')" class="p-galleria-thumbnail-prev-icon" /> </button> </div> </div> </template> <script> import ChevronDownIcon from 'primevue/icons/chevrondown'; import ChevronLeftIcon from 'primevue/icons/chevronleft'; import ChevronRightIcon from 'primevue/icons/chevronright'; import ChevronUpIcon from 'primevue/icons/chevronup'; import Ripple from 'primevue/ripple'; import { DomHandler } from 'primevue/utils'; export default { name: 'GalleriaThumbnails', emits: ['stop-slideshow', 'update:activeIndex'], props: { containerId: { type: String, default: null }, value: { type: Array, default: null }, numVisible: { type: Number, default: 3 }, activeIndex: { type: Number, default: 0 }, isVertical: { type: Boolean, default: false }, slideShowActive: { type: Boolean, default: false }, circular: { type: Boolean, default: false }, responsiveOptions: { type: Array, default: null }, contentHeight: { type: String, default: '300px' }, showThumbnailNavigators: { type: Boolean, default: true }, templates: { type: null, default: null }, prevButtonProps: { type: null, default: null }, nextButtonProps: { type: null, default: null } }, startPos: null, thumbnailsStyle: null, sortedResponsiveOptions: null, data() { return { d_numVisible: this.numVisible, d_oldNumVisible: this.numVisible, d_activeIndex: this.activeIndex, d_oldActiveItemIndex: this.activeIndex, totalShiftedItems: 0, page: 0 }; }, watch: { numVisible(newValue, oldValue) { this.d_numVisible = newValue; this.d_oldNumVisible = oldValue; }, activeIndex(newValue, oldValue) { this.d_activeIndex = newValue; this.d_oldActiveItemIndex = oldValue; } }, mounted() { this.createStyle(); this.calculatePosition(); if (this.responsiveOptions) { this.bindDocumentListeners(); } }, updated() { let totalShiftedItems = this.totalShiftedItems; if (this.d_oldNumVisible !== this.d_numVisible || this.d_oldActiveItemIndex !== this.d_activeIndex) { if (this.d_activeIndex <= this.getMedianItemIndex()) { totalShiftedItems = 0; } else if (this.value.length - this.d_numVisible + this.getMedianItemIndex() < this.d_activeIndex) { totalShiftedItems = this.d_numVisible - this.value.length; } else if (this.value.length - this.d_numVisible < this.d_activeIndex && this.d_numVisible % 2 === 0) { totalShiftedItems = this.d_activeIndex * -1 + this.getMedianItemIndex() + 1; } else { totalShiftedItems = this.d_activeIndex * -1 + this.getMedianItemIndex(); } if (totalShiftedItems !== this.totalShiftedItems) { this.totalShiftedItems = totalShiftedItems; } this.$refs.itemsContainer.style.transform = this.isVertical ? `translate3d(0, ${totalShiftedItems * (100 / this.d_numVisible)}%, 0)` : `translate3d(${totalShiftedItems * (100 / this.d_numVisible)}%, 0, 0)`; if (this.d_oldActiveItemIndex !== this.d_activeIndex) { DomHandler.removeClass(this.$refs.itemsContainer, 'p-items-hidden'); this.$refs.itemsContainer.style.transition = 'transform 500ms ease 0s'; } this.d_oldActiveItemIndex = this.d_activeIndex; this.d_oldNumVisible = this.d_numVisible; } }, beforeUnmount() { if (this.responsiveOptions) { this.unbindDocumentListeners(); } if (this.thumbnailsStyle) { this.thumbnailsStyle.parentNode.removeChild(this.thumbnailsStyle); } }, methods: { step(dir) { let totalShiftedItems = this.totalShiftedItems + dir; if (dir < 0 && -1 * totalShiftedItems + this.d_numVisible > this.value.length - 1) { totalShiftedItems = this.d_numVisible - this.value.length; } else if (dir > 0 && totalShiftedItems > 0) { totalShiftedItems = 0; } if (this.circular) { if (dir < 0 && this.value.length - 1 === this.d_activeIndex) { totalShiftedItems = 0; } else if (dir > 0 && this.d_activeIndex === 0) { totalShiftedItems = this.d_numVisible - this.value.length; } } if (this.$refs.itemsContainer) { DomHandler.removeClass(this.$refs.itemsContainer, 'p-items-hidden'); this.$refs.itemsContainer.style.transform = this.isVertical ? `translate3d(0, ${totalShiftedItems * (100 / this.d_numVisible)}%, 0)` : `translate3d(${totalShiftedItems * (100 / this.d_numVisible)}%, 0, 0)`; this.$refs.itemsContainer.style.transition = 'transform 500ms ease 0s'; } this.totalShiftedItems = totalShiftedItems; }, stopSlideShow() { if (this.slideShowActive && this.stopSlideShow) { this.$emit('stop-slideshow'); } }, getMedianItemIndex() { let index = Math.floor(this.d_numVisible / 2); return this.d_numVisible % 2 ? index : index - 1; }, navBackward(e) { this.stopSlideShow(); let prevItemIndex = this.d_activeIndex !== 0 ? this.d_activeIndex - 1 : 0; let diff = prevItemIndex + this.totalShiftedItems; if (this.d_numVisible - diff - 1 > this.getMedianItemIndex() && (-1 * this.totalShiftedItems !== 0 || this.circular)) { this.step(1); } let activeIndex = this.circular && this.d_activeIndex === 0 ? this.value.length - 1 : prevItemIndex; this.$emit('update:activeIndex', activeIndex); if (e.cancelable) { e.preventDefault(); } }, navForward(e) { this.stopSlideShow(); let nextItemIndex = this.d_activeIndex === this.value.length - 1 ? this.value.length - 1 : this.d_activeIndex + 1; if (nextItemIndex + this.totalShiftedItems > this.getMedianItemIndex() && (-1 * this.totalShiftedItems < this.getTotalPageNumber() - 1 || this.circular)) { this.step(-1); } let activeIndex = this.circular && this.value.length - 1 === this.d_activeIndex ? 0 : nextItemIndex; this.$emit('update:activeIndex', activeIndex); if (e.cancelable) { e.preventDefault(); } }, onItemClick(index) { this.stopSlideShow(); let selectedItemIndex = index; if (selectedItemIndex !== this.d_activeIndex) { const diff = selectedItemIndex + this.totalShiftedItems; let dir = 0; if (selectedItemIndex < this.d_activeIndex) { dir = this.d_numVisible - diff - 1 - this.getMedianItemIndex(); if (dir > 0 && -1 * this.totalShiftedItems !== 0) { this.step(dir); } } else { dir = this.getMedianItemIndex() - diff; if (dir < 0 && -1 * this.totalShiftedItems < this.getTotalPageNumber() - 1) { this.step(dir); } } this.$emit('update:activeIndex', selectedItemIndex); } }, onThumbnailKeydown(event, index) { if (event.code === 'Enter' || event.code === 'Space') { this.onItemClick(index); event.preventDefault(); } switch (event.code) { case 'ArrowRight': this.onRightKey(); break; case 'ArrowLeft': this.onLeftKey(); break; case 'Home': this.onHomeKey(); event.preventDefault(); break; case 'End': this.onEndKey(); event.preventDefault(); break; case 'ArrowUp': case 'ArrowDown': event.preventDefault(); break; case 'Tab': this.onTabKey(); break; default: break; } }, onRightKey() { const indicators = DomHandler.find(this.$refs.itemsContainer, '.p-galleria-thumbnail-item'); const activeIndex = this.findFocusedIndicatorIndex(); this.changedFocusedIndicator(activeIndex, activeIndex + 1 === indicators.length ? indicators.length - 1 : activeIndex + 1); }, onLeftKey() { const activeIndex = this.findFocusedIndicatorIndex(); this.changedFocusedIndicator(activeIndex, activeIndex - 1 <= 0 ? 0 : activeIndex - 1); }, onHomeKey() { const activeIndex = this.findFocusedIndicatorIndex(); this.changedFocusedIndicator(activeIndex, 0); }, onEndKey() { const indicators = DomHandler.find(this.$refs.itemsContainer, '.p-galleria-thumbnail-item'); const activeIndex = this.findFocusedIndicatorIndex(); this.changedFocusedIndicator(activeIndex, indicators.length - 1); }, onTabKey() { const indicators = [...DomHandler.find(this.$refs.itemsContainer, '.p-galleria-thumbnail-item')]; const highlightedIndex = indicators.findIndex((ind) => DomHandler.hasClass(ind, 'p-galleria-thumbnail-item-current')); const activeIndicator = DomHandler.findSingle(this.$refs.itemsContainer, '.p-galleria-thumbnail-item > [tabindex="0"'); const activeIndex = indicators.findIndex((ind) => ind === activeIndicator.parentElement); indicators[activeIndex].children[0].tabIndex = '-1'; indicators[highlightedIndex].children[0].tabIndex = '0'; }, findFocusedIndicatorIndex() { const indicators = [...DomHandler.find(this.$refs.itemsContainer, '.p-galleria-thumbnail-item')]; const activeIndicator = DomHandler.findSingle(this.$refs.itemsContainer, '.p-galleria-thumbnail-item > [tabindex="0"]'); return indicators.findIndex((ind) => ind === activeIndicator.parentElement); }, changedFocusedIndicator(prevInd, nextInd) { const indicators = DomHandler.find(this.$refs.itemsContainer, '.p-galleria-thumbnail-item'); indicators[prevInd].children[0].tabIndex = '-1'; indicators[nextInd].children[0].tabIndex = '0'; indicators[nextInd].children[0].focus(); }, onTransitionEnd() { if (this.$refs.itemsContainer) { DomHandler.addClass(this.$refs.itemsContainer, 'p-items-hidden'); this.$refs.itemsContainer.style.transition = ''; } }, onTouchStart(e) { let touchobj = e.changedTouches[0]; this.startPos = { x: touchobj.pageX, y: touchobj.pageY }; }, onTouchMove(e) { if (e.cancelable) { e.preventDefault(); } }, onTouchEnd(e) { let touchobj = e.changedTouches[0]; if (this.isVertical) { this.changePageOnTouch(e, touchobj.pageY - this.startPos.y); } else { this.changePageOnTouch(e, touchobj.pageX - this.startPos.x); } }, changePageOnTouch(e, diff) { if (diff < 0) { // left this.navForward(e); } else { // right this.navBackward(e); } }, getTotalPageNumber() { return this.value.length > this.d_numVisible ? this.value.length - this.d_numVisible + 1 : 0; }, createStyle() { if (!this.thumbnailsStyle) { this.thumbnailsStyle = document.createElement('style'); this.thumbnailsStyle.type = 'text/css'; document.body.appendChild(this.thumbnailsStyle); } let innerHTML = ` #${this.containerId} .p-galleria-thumbnail-item { flex: 1 0 ${100 / this.d_numVisible}% } `; if (this.responsiveOptions) { this.sortedResponsiveOptions = [...this.responsiveOptions]; this.sortedResponsiveOptions.sort((data1, data2) => { const value1 = data1.breakpoint; const value2 = data2.breakpoint; let result = null; if (value1 == null && value2 != null) result = -1; else if (value1 != null && value2 == null) result = 1; else if (value1 == null && value2 == null) result = 0; else if (typeof value1 === 'string' && typeof value2 === 'string') result = value1.localeCompare(value2, undefined, { numeric: true }); else result = value1 < value2 ? -1 : value1 > value2 ? 1 : 0; return -1 * result; }); for (let i = 0; i < this.sortedResponsiveOptions.length; i++) { let res = this.sortedResponsiveOptions[i]; innerHTML += ` @media screen and (max-width: ${res.breakpoint}) { #${this.containerId} .p-galleria-thumbnail-item { flex: 1 0 ${100 / res.numVisible}% } } `; } } this.thumbnailsStyle.innerHTML = innerHTML; }, calculatePosition() { if (this.$refs.itemsContainer && this.sortedResponsiveOptions) { let windowWidth = window.innerWidth; let matchedResponsiveData = { numVisible: this.numVisible }; for (let i = 0; i < this.sortedResponsiveOptions.length; i++) { let res = this.sortedResponsiveOptions[i]; if (parseInt(res.breakpoint, 10) >= windowWidth) { matchedResponsiveData = res; } } if (this.d_numVisible !== matchedResponsiveData.numVisible) { this.d_numVisible = matchedResponsiveData.numVisible; } } }, bindDocumentListeners() { if (!this.documentResizeListener) { this.documentResizeListener = () => { this.calculatePosition(); }; window.addEventListener('resize', this.documentResizeListener); } }, unbindDocumentListeners() { if (this.documentResizeListener) { window.removeEventListener('resize', this.documentResizeListener); this.documentResizeListener = null; } }, isNavBackwardDisabled() { return (!this.circular && this.d_activeIndex === 0) || this.value.length <= this.d_numVisible; }, isNavForwardDisabled() { return (!this.circular && this.d_activeIndex === this.value.length - 1) || this.value.length <= this.d_numVisible; }, firstItemAciveIndex() { return this.totalShiftedItems * -1; }, lastItemActiveIndex() { return this.firstItemAciveIndex() + this.d_numVisible - 1; }, isItemActive(index) { return this.firstItemAciveIndex() <= index && this.lastItemActiveIndex() >= index; }, ariaPageLabel(value) { return this.$primevue.config.locale.aria ? this.$primevue.config.locale.aria.pageLabel.replace(/{page}/g, value) : undefined; } }, computed: { navBackwardClass() { return [ 'p-galleria-thumbnail-prev p-link', { 'p-disabled': this.isNavBackwardDisabled() } ]; }, navForwardClass() { return [ 'p-galleria-thumbnail-next p-link', { 'p-disabled': this.isNavForwardDisabled() } ]; }, ariaPrevButtonLabel() { return this.$primevue.config.locale.aria ? this.$primevue.config.locale.aria.prevPageLabel : undefined; }, ariaNextButtonLabel() { return this.$primevue.config.locale.aria ? this.$primevue.config.locale.aria.nextPageLabel : undefined; } }, components: { ChevronLeftIcon: ChevronLeftIcon, ChevronRightIcon: ChevronRightIcon, ChevronUpIcon: ChevronUpIcon, ChevronDownIcon: ChevronDownIcon }, directives: { ripple: Ripple } }; </script>