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106 lines
3.5 KiB
HTML
106 lines
3.5 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
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<title>Vue.js elastic header example</title>
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<!-- Delete ".min" for console warnings in development -->
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<script src="../../dist/vue.min.js"></script>
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<script src="http://dynamicsjs.com/lib/dynamics.js"></script>
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<link rel="stylesheet" href="style.css">
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<!-- template for the component -->
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<script type="text/x-template" id="header-view-template">
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<div class="draggable-header-view"
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@mousedown="startDrag" @touchstart="startDrag"
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@mousemove="onDrag" @touchmove="onDrag"
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@mouseup="stopDrag" @touchend="stopDrag" @mouseleave="stopDrag">
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<svg class="bg" width="320" height="560">
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<path :d="headerPath" fill="#3F51B5"></path>
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</svg>
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<div class="header">
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<slot name="header"></slot>
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</div>
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<div class="content" :style="contentPosition">
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<slot name="content"></slot>
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</div>
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</div>
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</script>
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</head>
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<body>
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<div id="app" @touchmove.prevent>
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<draggable-header-view>
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<template slot="header">
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<h1>Elastic Draggable SVG Header</h1>
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<p>with <a href="https://vuejs.org">Vue.js</a> + <a href="http://dynamicsjs.com">dynamics.js</a></p>
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</template>
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<template slot="content">
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<p>Note this is just an effect demo - there are of course many additional details if you want to use this in production, e.g. handling responsive sizes, reload threshold and content scrolling. Those are out of scope for this quick little hack. However, the idea is that you can hide them as internal details of a Vue.js component and expose a simple Web-Component-like interface.</p>
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</template>
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</draggable-header-view>
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</div>
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<script>
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Vue.component('draggable-header-view', {
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template: '#header-view-template',
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data: function () {
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return {
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dragging: false,
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// quadratic bezier control point
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c: { x: 160, y: 160 },
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// record drag start point
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start: { x: 0, y: 0 }
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}
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},
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computed: {
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headerPath: function () {
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return 'M0,0 L320,0 320,160' +
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'Q' + this.c.x + ',' + this.c.y +
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' 0,160'
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},
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contentPosition: function () {
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var dy = this.c.y - 160
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var dampen = dy > 0 ? 2 : 4
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return {
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transform: 'translate3d(0,' + dy / dampen + 'px,0)'
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}
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}
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},
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methods: {
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startDrag: function (e) {
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e = e.changedTouches ? e.changedTouches[0] : e
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this.dragging = true
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this.start.x = e.pageX
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this.start.y = e.pageY
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},
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onDrag: function (e) {
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e = e.changedTouches ? e.changedTouches[0] : e
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if (this.dragging) {
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this.c.x = 160 + (e.pageX - this.start.x)
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// dampen vertical drag by a factor
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var dy = e.pageY - this.start.y
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var dampen = dy > 0 ? 1.5 : 4
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this.c.y = 160 + dy / dampen
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}
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},
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stopDrag: function () {
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if (this.dragging) {
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this.dragging = false
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dynamics.animate(this.c, {
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x: 160,
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y: 160
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}, {
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type: dynamics.spring,
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duration: 700,
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friction: 280
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})
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}
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}
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}
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})
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new Vue({ el: '#app' })
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</script>
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</body>
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</html>
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