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| 1 | +<!DOCTYPE html> |
| 2 | +<html lang="en"> |
| 3 | + <head> |
| 4 | + <meta charset="utf-8"> |
| 5 | + <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no"> |
| 6 | + <title></title> |
| 7 | + <script src="../../dist/vue.js"></script> |
| 8 | + <script src="http://dynamicsjs.com/lib/dynamics.js"></script> |
| 9 | + <link rel="stylesheet" href="style.css"> |
| 10 | + <!-- template for the component --> |
| 11 | + <template id="header-view-template" style="display:none"> |
| 12 | + <div class="draggable-header-view" |
| 13 | + @mousedown="startDrag" @touchstart="startDrag" |
| 14 | + @mousemove="onDrag" @touchmove="onDrag" |
| 15 | + @mouseup="stopDrag" @touchend="stopDrag" @mouseleave="stopDrag"> |
| 16 | + <svg class="bg" width="320" height="560"> |
| 17 | + <path :d="headerPath" fill="#3F51B5"></path> |
| 18 | + </svg> |
| 19 | + <div class="header"> |
| 20 | + <slot name="header"></slot> |
| 21 | + </div> |
| 22 | + <div class="content" :style="contentPosition"> |
| 23 | + <slot name="content"></slot> |
| 24 | + </div> |
| 25 | + </div> |
| 26 | + </template> |
| 27 | + </head> |
| 28 | + <body @touchmove.prevent> |
| 29 | + |
| 30 | + <draggable-header-view> |
| 31 | + <template slot="header"> |
| 32 | + <h1>Elastic Draggable SVG Header</h1> |
| 33 | + <p>with <a href="http://vuejs.org">Vue.js</a> + <a href="http://dynamicsjs.com">dynamics.js</a></p> |
| 34 | + </template> |
| 35 | + <template slot="content"> |
| 36 | + <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> |
| 37 | + </template> |
| 38 | + </draggable-header-view> |
| 39 | + |
| 40 | + <script> |
| 41 | + Vue.component('draggable-header-view', { |
| 42 | + template: '#header-view-template', |
| 43 | + data: function () { |
| 44 | + return { |
| 45 | + dragging: false, |
| 46 | + // quadratic bezier control point |
| 47 | + c: { x: 160, y: 160 }, |
| 48 | + // record drag start point |
| 49 | + start: { x: 0, y: 0 } |
| 50 | + } |
| 51 | + }, |
| 52 | + computed: { |
| 53 | + headerPath: function () { |
| 54 | + return 'M0,0 L320,0 320,160' + |
| 55 | + 'Q' + this.c.x + ',' + this.c.y + |
| 56 | + ' 0,160' |
| 57 | + }, |
| 58 | + contentPosition: function () { |
| 59 | + var dy = this.c.y - 160 |
| 60 | + var dampen = dy > 0 ? 2 : 4 |
| 61 | + return { |
| 62 | + transform: 'translate3d(0,' + dy / dampen + 'px,0)' |
| 63 | + } |
| 64 | + } |
| 65 | + }, |
| 66 | + methods: { |
| 67 | + startDrag: function (e) { |
| 68 | + e = e.changedTouches ? e.changedTouches[0] : e |
| 69 | + this.dragging = true |
| 70 | + this.start.x = e.pageX |
| 71 | + this.start.y = e.pageY |
| 72 | + }, |
| 73 | + onDrag: function (e) { |
| 74 | + e = e.changedTouches ? e.changedTouches[0] : e |
| 75 | + if (this.dragging) { |
| 76 | + this.c.x = 160 + (e.pageX - this.start.x) |
| 77 | + // dampen vertical drag by a factor |
| 78 | + var dy = e.pageY - this.start.y |
| 79 | + var dampen = dy > 0 ? 1.5 : 4 |
| 80 | + this.c.y = 160 + dy / dampen |
| 81 | + } |
| 82 | + }, |
| 83 | + stopDrag: function () { |
| 84 | + if (this.dragging) { |
| 85 | + this.dragging = false |
| 86 | + dynamics.animate(this.c, { |
| 87 | + x: 160, |
| 88 | + y: 160 |
| 89 | + }, { |
| 90 | + type: dynamics.spring, |
| 91 | + duration: 700, |
| 92 | + friction: 280 |
| 93 | + }) |
| 94 | + } |
| 95 | + } |
| 96 | + } |
| 97 | + }) |
| 98 | + |
| 99 | + new Vue({ el: 'body' }) |
| 100 | + </script> |
| 101 | + </body> |
| 102 | +</html> |
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