1 2 Polymer('paper-menu-button-transition', { 3 4 baseClass: 'paper-menu-button-transition', 5 revealedClass: 'paper-menu-button-revealed', 6 openedClass: 'paper-menu-button-opened', 7 closedClass: 'paper-menu-button-closed', 8 9 duration: 500, 10 11 setup: function(node) { 12 this.super(arguments); 13 14 var bg = node.querySelector('.paper-menu-button-overlay-bg'); 15 bg.style.transformOrigin = this.transformOrigin; 16 bg.style.webkitTransformOrigin = this.transformOrigin; 17 }, 18 19 transitionOpened: function(node, opened) { 20 this.super(arguments); 21 22 if (opened) { 23 if (this.player) { 24 this.player.cancel(); 25 } 26 27 var anims = []; 28 29 var ink = node.querySelector('.paper-menu-button-overlay-ink'); 30 var offset = 40 / Math.max(node.cachedSize.width, node.cachedSize.height); 31 anims.push(new Animation(ink, [{ 32 'opacity': 0.9, 33 'transform': 'scale(0)', 34 }, { 35 'opacity': 0.9, 36 'transform': 'scale(1)' 37 }], { 38 duration: this.duration * offset 39 })); 40 41 var bg = node.querySelector('.paper-menu-button-overlay-bg'); 42 anims.push(new Animation(bg, [{ 43 'opacity': 0.9, 44 'transform': 'scale(' + 40 / node.cachedSize.width + ',' + 40 / node.cachedSize.height + ')', 45 }, { 46 'opacity': 1, 47 'transform': 'scale(0.95, 0.5)' 48 }, { 49 'opacity': 1, 50 'transform': 'scale(1, 1)' 51 }], { 52 delay: this.duration * offset, 53 duration: this.duration * (1 - offset), 54 fill: 'forwards' 55 })); 56 57 var nodes = window.ShadowDOMPolyfill ? Platform.queryAllShadows(node.querySelector('core-menu'), 'content').getDistributedNodes() : node.querySelector('core-menu::shadow content').getDistributedNodes().array(); 58 var items = nodes.filter(function(n) { 59 return n.nodeType === Node.ELEMENT_NODE; 60 }); 61 var itemDelay = offset + (1 - offset) / 2; 62 var itemDuration = this.duration * (1 - itemDelay) / items.length; 63 items.forEach(function(item, i) { 64 anims.push(new Animation(item, [{ 65 'opacity': 0 66 }, { 67 'opacity': 1 68 }], { 69 delay: this.duration * itemDelay + itemDuration * i, 70 duration: itemDuration, 71 fill: 'both' 72 })); 73 }.bind(this)); 74 75 var shadow = node.querySelector('paper-shadow'); 76 anims.push(new Animation(shadow, function(t, target) { 77 if (t > offset * 2 && shadow.z === 0) { 78 shadow.z = 1 79 } 80 }, { 81 duration: this.duration 82 })); 83 84 var group = new AnimationGroup(anims, { 85 easing: 'cubic-bezier(0.4, 0, 0.2, 1)' 86 }); 87 this.player = document.timeline.play(group); 88 } 89 }, 90 91 }); 92