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/**
* 画像切り替え
*
* @author ao-system, Inc.
* @date 2022-10-06
* @date 2024-01-09
* @date 2024-01-17 Rewrite the code using the class syntax.
*
<section class="switchpanel">
<div>
<div id="switchPanelStage"></div>
</div>
</section>
<style>
section.switchpanel {
background-color: #eee;
> div {
max-width: 1920px;
margin: 0 auto;
overflow: hidden;
> #switchPanelStage {
user-select: none;
display: grid;
grid-template-rows: 1fr;
grid-template-columns: 1fr;
> div {
grid-row: 1/2;
grid-column: 1/2;
&:nth-of-type(1) {
z-index: 0;
}
&:nth-of-type(2) {
z-index: 1;
transition: 0.5s;
cursor: ew-resize;
}
&:nth-of-type(3) {
z-index: 2;
justify-self: flex-end;
align-self: end;
display: flex;
justify-content: center;
align-items: center;
column-gap: 5px;
padding: 0 20px 17px 0;
@media (width < 670px) {
column-gap: 3px;
padding: 0 4px 4px 0;
> span {
> img {
width: 16px;
}
}
}
> span {
cursor: pointer;
> img:nth-of-type(1) {
display: block;
}
> img:nth-of-type(2) {
display: none;
}
&.on {
> img:nth-of-type(1) {
display: none;
}
> img:nth-of-type(2) {
display: block;
}
}
}
}
> a {
> picture {
> img {
width: 100%;
}
}
}
}
}
}
}
</style>
*
*/
(() => {
'use strict';
class SwitchImage {
#constProperties = [
{prop: 'stage', value: document.getElementById('switchPanelStage')},
{prop: 'layer0', value: document.createElement('div')},
{prop: 'layer1', value: document.createElement('div')},
{prop: 'layerNav', value: document.createElement('div')},
{prop: 'markPause', value: './image/panel_pause.svg'},
{prop: 'markPlay', value: './image/panel_play.svg'},
{prop: 'markNavOn', value: './image/panel_ball_on.svg'},
{prop: 'markNavOff', value: './image/panel_ball_off.svg'},
{prop: 'buttonPause', value: document.createElement('span')},
{prop: 'buttonPlay', value: document.createElement('span')},
{prop: 'imageChangeInterval', value: 4000}, //画像と画像の時間間隔
{prop: 'slideWidth', value: 50}, //切り替わるスライド幅
{prop: 'slideTime', value: 600}, //スライド時間cssの0.5sよりちょっと長め
{prop: 'swipeShreshold', value: 50}, //スワイプ判定幅
];
#loopTimeoutId = null; //自動動作のタイマー
#isBusy = false; //動作中
#pausePlayFlag = true; //falseで停止
#focusFlag = true; //フォーカスが外れている時は動作させないため
#valueIndex = 0; //this.#valuesの添え字
#slideDirection = 1; //1|-1 正方向,逆方向
#swipeStartX = 0; //スワイプ開始位置
#swipeStartY = 0; //スワイプ開始位置
#isSwiping = false; //スワイプ中
#values = [];
//
constructor(values) {
this.#values = values;
this.#constProperties.forEach((obj) => Object.defineProperty(this, obj.prop, {value:obj.value, writable:false}));
this.#init();
}
#init() {
this.stage.appendChild(this.layer0);
this.stage.appendChild(this.layer1);
this.stage.appendChild(this.layerNav);
//this.#values = shuffle(this.#values); //シャッフルさせる場合
//window.addEventListener('focus',() => { this.#focusFlag = true;}); //out focusで停止させる場合の処理
//window.addEventListener('blur',() => { this.#focusFlag = false;}); //out focusで停止させる場合の処理
//
this.layer0.innerHTML = this.#values[0];
this.layer1.innerHTML = this.#values[0];
this.layer1.animate(
[{opacity: 0}],
{delay:0,duration:0, easing:'linear',fill:'forwards', },
);
this.#preload();
this.#initNav();
this.#initSwipe();
this.#navOn();
this.#autoSlide();
}
#shuffle(array) {
for (let i = array.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[array[i], array[j]] = [array[j], array[i]];
}
return array;
}
//プリロード 最後に最初の表示になるように後ろから前へプリロードする
#preload() {
for (let i = this.#values.length - 1; i >= 0; i--) {
setTimeout(() => {
this.layer1.innerHTML = this.#values[i];
},10);
}
}
#initNav() {
this.#values.map((x,index) => {
const span = document.createElement('span');
span.addEventListener('click',() => {
if (this.#isBusy) {
return;
}
this.#slideAction(index);
});
span.innerHTML = '<img src="' + this.markNavOff + '"><img src="' + this.markNavOn + '">';
this.layerNav.appendChild(span);
});
const pauseImg = new Image();
pauseImg.src = this.markPause;
this.buttonPause.appendChild(pauseImg);
this.layerNav.appendChild(this.buttonPause);
const playImg = new Image();
playImg.src = this.markPlay;
this.buttonPlay.appendChild(playImg);
this.layerNav.appendChild(this.buttonPlay);
this.buttonPlay.style.display = 'none';
this.buttonPause.addEventListener('click',() => this.#setPause());
this.buttonPlay.addEventListener('click',() => this.#setPlay());
}
#initSwipe() {
this.layer1.addEventListener('click', (e) => { e.preventDefault();});
this.layer1.addEventListener('mousedown', (e) => { this.#swipeStart(e.clientX, e.clientY); });
this.layer1.addEventListener('mouseup', (e) => { this.#swipeEnd(e.target, e.clientX, e.clientY); });
this.layer1.addEventListener('touchstart', (e) => { this.#swipeStart(e.touches[0].clientX, e.touches[0].clientY); });
this.layer1.addEventListener('touchend', (e) => { this.#swipeEnd(e.target, e.changedTouches[0].clientX, e.touches[0].clientY); });
}
#swipeStart(positionX,positionY) {
if (this.#isBusy) {
return;
}
this.#swipeStartX = positionX;
this.#swipeStartY = positionY;
this.layer1.style.cursor = 'grabbing';
this.#isSwiping = true;
}
#swipeEnd(targetElm,positionX,positionY) {
if (this.#isSwiping == false) {
return;
}
if (this.#swipeStartX - positionX > this.swipeShreshold) {
this.#slideAction(this.#withinRange(this.#valueIndex + 1));
} else if (this.#swipeStartX - positionX < -this.swipeShreshold) {
this.#slideDirection = -1;
this.#slideAction(this.#withinRange(this.#valueIndex - 1));
} else if (this.#swipeStartY - positionY > this.swipeShreshold) {
//何もしない
} else if (this.#swipeStartY - positionY < -this.swipeShreshold) {
//何もしない
} else {
let attrLink = null;
let attrTarget = null;
let targetElm2 = targetElm;
for (let i = 0; i < 9; i++) { //画像からこの回数の親を調べる
targetElm2 = targetElm2.parentNode;
if (targetElm2 == this.layer1) {
break; //リンクが無かった場合
}
attrLink = targetElm2.getAttribute('href');
if (attrLink) {
attrTarget = targetElm2.getAttribute('target');
break; //調査完了
}
}
if (attrLink) {
if (attrTarget) {
window.open(attrLink, attrTarget);
} else {
window.location.href = attrLink;
}
return;
}
}
this.layer1.style.cursor = '';
this.#isSwiping = false;
}
#setPause() {
this.#pausePlayFlag = false;
this.buttonPause.style.display = 'none';
this.buttonPlay.style.display = 'block';
}
#setPlay() {
this.#pausePlayFlag = true;
this.buttonPause.style.display = 'block';
this.buttonPlay.style.display = 'none';
}
#slideForward() {
if (this.#isBusy) {
return;
}
this.#isBusy = true;
this.#navOn();
this.layer1.innerHTML = this.#values[this.#valueIndex];
this.layer1.animate(
[
{opacity: 0,transform:'translateX(' + (this.slideWidth * this.#slideDirection) + 'px)'},
{opacity: 1,transform:'translateX(0px)'},
],
{delay:0,duration:this.slideTime, easing:'ease-out',fill:'forwards', },
);
setTimeout(() => {
this.layer0.innerHTML = this.#values[this.#valueIndex];
this.layer1.animate(
[{opacity: 0}],
{delay:100,duration:0, easing:'linear',fill:'forwards', },
);
this.#slideDirection = 1;
setTimeout(() => {
this.#isBusy = false;
},100);
},this.slideTime);
}
#autoSlide() {
this.#loopTimeoutId = setTimeout(() => {
if (this.#pausePlayFlag && this.#focusFlag) {
this.#slideAction();
} else {
this.#autoSlide();
}
}, this.imageChangeInterval - this.slideTime);
}
#slideAction(num = this.#valueIndex + 1) {
clearTimeout(this.#loopTimeoutId);
this.#valueIndex = this.#withinRange(num);
this.#slideForward();
this.#autoSlide();
}
#navOn() {
const spans = this.layerNav.querySelectorAll('span');
spans.forEach((elm) => elm.classList.remove('on'));
spans[this.#valueIndex].classList.add('on');
}
#withinRange(nextNumber) {
const num = (nextNumber >= 0) ? nextNumber : this.#values.length - 1;
return num % this.#values.length;
}
}
//
new SwitchImage(
[
'<a draggable="false"><picture><source srcset="./image/panel01b.webp" media="(width < 700px)"><img src="./image/panel01.webp" draggable="false"></picture></a>',
'<a draggable="false"><picture><source srcset="./image/panel02b.webp" media="(width < 700px)"><img src="./image/panel02.webp" draggable="false"></picture></a>',
'<a draggable="false"><picture><source srcset="./image/panel03b.webp" media="(width < 700px)"><img src="./image/panel03.webp" draggable="false"></picture></a>',
'<a draggable="false"><picture><source srcset="./image/panel04b.webp" media="(width < 700px)"><img src="./image/panel04.webp" draggable="false"></picture></a>',
'<a draggable="false"><picture><source srcset="./image/panel05b.webp" media="(width < 700px)"><img src="./image/panel05.webp" draggable="false"></picture></a>',
'<a draggable="false"><picture><source srcset="./image/panel06b.webp" media="(width < 700px)"><img src="./image/panel06.webp" draggable="false"></picture></a>',
]
);
})();
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