website/temp.html at main · fold-ui/website · GitHub

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<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta
            name="viewport"
            content="width=device-width, initial-scale=1.0" />
        <title>Multi-object Drag / Resize / Rotate</title>
        <style>
            /* --------  page  -------- */
            html,
            body {
                margin: 0;
                height: 100%;
                background: #f5f5f5;
                overflow: hidden;
                font-family: sans-serif;
            }
            #toolbar {
                position: fixed;
                top: 10px;
                left: 10px;
                z-index: 1000;
            }
            #toolbar button {
                padding: 0.4rem 0.8rem;
                border: 0;
                border-radius: 4px;
                background: #1e88e5;
                color: #fff;
                cursor: pointer;
            }
            #toolbar button:hover {
                background: #0d47a1;
            }

            /* --------  box & handles  -------- */
            .box-wrapper {
                position: absolute;
                transform-origin: top left;
                user-select: none;
            }
            .box {
                outline: 2px solid #1e88e5;
                outline-offset: -2px;
                position: relative;
                cursor: grab;
                transform: translate(-50%, -50%);
            }
            .box:active {
                cursor: grabbing;
            }
            .box img {
                pointer-events: none;
                user-select: none;
                width: 100%;
                height: 100%;
            }

            /* text inside box */
            .text {
                padding: 30px;
                width: calc(100% - 60px);
                height: 100%;
                position: absolute;
                top: 0;
                left: 0;
                font-size: 20px;
                outline: none;
            }
            .text:focus {
                outline: none;
            }

            /* handles */
            .dot {
                position: absolute;
                height: 10px;
                width: 10px;
                background: #1e88e5;
                border: 1px solid #fff;
                border-radius: 50%;
                z-index: 10;
            }
            .dot:hover {
                background: #0d47a1;
                cursor: grab;
            }
            .dot:active {
                cursor: grabbing;
            }
            .left-top {
                top: -5px;
                left: -5px;
            }
            .right-top {
                top: -5px;
                right: -5px;
            }
            .right-bottom {
                bottom: -5px;
                right: -5px;
            }
            .left-bottom {
                bottom: -5px;
                left: -5px;
            }
            .top-mid {
                top: -5px;
                left: calc(50% - 5px);
            }
            .bottom-mid {
                bottom: -5px;
                left: calc(50% - 5px);
            }
            .left-mid {
                left: -5px;
                top: calc(50% - 5px);
            }
            .right-mid {
                right: -5px;
                top: calc(50% - 5px);
            }
            .rotate {
                top: -30px;
                left: calc(50% - 5px);
                cursor: url('https://findicons.com/files/icons/1620/crystal_project/16/rotate_ccw.png'),
                    auto;
            }
            .rotate-link {
                position: absolute;
                width: 1px;
                height: 15px;
                background: #1e88e5;
                top: -20px;
                left: calc(50% + 0.5px);
                z-index: -1;
            }
        </style>
    </head>
    <body>
        <div id="toolbar">
            <button id="add-random">Add random object</button>
        </div>

        <script>
            const MIN_W = 40,
                MIN_H = 40

            /* ---------- factory helpers ---------- */
            function baseMarkup(innerHTML) {
                return `
    <div class="dot rotate"></div>
    <div class="dot left-top"></div><div class="dot right-top"></div>
    <div class="dot right-bottom"></div><div class="dot left-bottom"></div>
    <div class="dot top-mid"></div><div class="dot bottom-mid"></div>
    <div class="dot left-mid"></div><div class="dot right-mid"></div>
    <div class="rotate-link"></div>
    ${innerHTML}
  `
            }
            function createBoxWrapper(x, y, w, h, innerHTML) {
                const wrap = document.createElement('div')
                wrap.className = 'box-wrapper'
                wrap.style.left = x + 'px'
                wrap.style.top = y + 'px'
                const box = document.createElement('div')
                box.className = 'box'
                box.style.width = w + 'px'
                box.style.height = h + 'px'
                box.insertAdjacentHTML('beforeend', baseMarkup(innerHTML))
                wrap.appendChild(box)
                document.body.appendChild(wrap)
                initInteractions(wrap)
                return wrap
            }
            function createImageBox(src, x, y, w, h) {
                return createBoxWrapper(x, y, w, h, `<img src="${src}">`)
            }
            function createTextBox(text, x, y, w, h) {
                return createBoxWrapper(
                    x,
                    y,
                    w,
                    h,
                    `<div class="text" contenteditable="true">${text}</div>`
                )
            }

            /* ---------- interaction logic ---------- */
            function initInteractions(wrapper) {
                const box = wrapper.querySelector('.box')
                const handles = {
                    lt: wrapper.querySelector('.left-top'),
                    rt: wrapper.querySelector('.right-top'),
                    rb: wrapper.querySelector('.right-bottom'),
                    lb: wrapper.querySelector('.left-bottom'),
                    lm: wrapper.querySelector('.left-mid'),
                    rm: wrapper.querySelector('.right-mid'),
                    tm: wrapper.querySelector('.top-mid'),
                    bm: wrapper.querySelector('.bottom-mid'),
                    rot: wrapper.querySelector('.rotate'),
                }
                let initX, initY, startX, startY, initW, initH, initRot
                const reposition = (x, y) => {
                    wrapper.style.left = x + 'px'
                    wrapper.style.top = y + 'px'
                }
                const resize = (w, h) => {
                    box.style.width = w + 'px'
                    box.style.height = h + 'px'
                }
                const getRot = (el) => {
                    const t = getComputedStyle(el).transform
                    if (t === 'none') return 0
                    const [a, b] = t.match(/matrix.*\((.+)\)/)[1].split(',')
                    return (Math.atan2(b, a) * 180) / Math.PI
                }
                const setRot = (deg) => (wrapper.style.transform = `rotate(${deg}deg)`)

                /* drag */
                wrapper.addEventListener('mousedown', (e) => {
                    if (e.target.classList.contains('dot')) return
                    initX = wrapper.offsetLeft
                    initY = wrapper.offsetTop
                    startX = e.clientX
                    startY = e.clientY
                    const move = (e2) =>
                        reposition(initX + e2.clientX - startX, initY + e2.clientY - startY)
                    window.addEventListener('mousemove', move)
                    window.addEventListener(
                        'mouseup',
                        () => window.removeEventListener('mousemove', move),
                        { once: true }
                    )
                })

                /* resize helper */
                function attachResize(dot, left, top, xR, yR) {
                    dot.addEventListener('mousedown', (e) => {
                        e.stopPropagation()
                        initX = wrapper.offsetLeft
                        initY = wrapper.offsetTop
                        startX = e.clientX
                        startY = e.clientY
                        initW = box.offsetWidth
                        initH = box.offsetHeight
                        initRot = (getRot(wrapper) * Math.PI) / 180
                        const cos = Math.cos(initRot),
                            sin = Math.sin(initRot)
                        const move = (e2) => {
                            let wDiff = e2.clientX - startX,
                                hDiff = e2.clientY - startY
                            let rW = cos * wDiff + sin * hDiff,
                                rH = cos * hDiff - sin * wDiff
                            let newW = initW,
                                newH = initH,
                                newX = initX,
                                newY = initY
                            if (xR) {
                                if (left) {
                                    newW = initW - rW
                                    rW = initW - newW
                                } else {
                                    newW = initW + rW
                                }
                                if (newW < MIN_W) {
                                    newW = MIN_W
                                    rW = left ? initW - MIN_W : MIN_W - initW
                                }
                                newX += 0.5 * rW * cos
                                newY += 0.5 * rW * sin
                            }
                            if (yR) {
                                if (top) {
                                    newH = initH - rH
                                    rH = initH - newH
                                } else {
                                    newH = initH + rH
                                }
                                if (newH < MIN_H) {
                                    newH = MIN_H
                                    rH = top ? initH - MIN_H : MIN_H - initH
                                }
                                newX -= 0.5 * rH * sin
                                newY += 0.5 * rH * cos
                            }
                            resize(newW, newH)
                            reposition(newX, newY)
                        }
                        window.addEventListener('mousemove', move)
                        window.addEventListener(
                            'mouseup',
                            () => window.removeEventListener('mousemove', move),
                            { once: true }
                        )
                    })
                }
                attachResize(handles.rm, false, false, true, false)
                attachResize(handles.lm, true, false, true, false)
                attachResize(handles.tm, false, true, false, true)
                attachResize(handles.bm, false, false, false, true)
                attachResize(handles.lt, true, true, true, true)
                attachResize(handles.rt, false, true, true, true)
                attachResize(handles.rb, false, false, true, true)
                attachResize(handles.lb, true, false, true, true)

                /* rotate */
                handles.rot.addEventListener('mousedown', (e) => {
                    e.stopPropagation()
                    const r = box.getBoundingClientRect(),
                        cx = r.left + r.width / 2,
                        cy = r.top + r.height / 2
                    const move = (e2) =>
                        setRot((Math.atan2(e2.clientY - cy, e2.clientX - cx) * 180) / Math.PI + 90)
                    window.addEventListener('mousemove', move)
                    window.addEventListener(
                        'mouseup',
                        () => window.removeEventListener('mousemove', move),
                        { once: true }
                    )
                })
            }

            /* ---------- demo objects ---------- */
            createImageBox(
                'https://www.thelessonspace.com/_nuxt/logo.BpPnDxxn.svg',
                400,
                200,
                500,
                200
            )
            createTextBox('Edit me!', 250, 400, 400, 200)

            /* ---------- random add button ---------- */
            document.getElementById('add-random').addEventListener('click', () => {
                const w = 300 + Math.random() * 200,
                    h = 150 + Math.random() * 150
                const x = 100 + Math.random() * 600,
                    y = 100 + Math.random() * 400
                if (Math.random() < 0.5) {
                    createImageBox(
                        `https://picsum.photos/${Math.round(w)}/${Math.round(h)}?rand=${Math.random()}`,
                        x,
                        y,
                        w,
                        h
                    )
                } else {
                    createTextBox('Click to edit', x, y, w, h)
                }
            })
        </script>
    </body>
</html>