| 1 | // Copyright (c) 2013 Google, Inc. |
| 2 | // |
| 3 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 | // of this software and associated documentation files (the "Software"), to deal |
| 5 | // in the Software without restriction, including without limitation the rights |
| 6 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 | // copies of the Software, and to permit persons to whom the Software is |
| 8 | // furnished to do so, subject to the following conditions: |
| 9 | // |
| 10 | // The above copyright notice and this permission notice shall be included in |
| 11 | // all copies or substantial portions of the Software. |
| 12 | // |
| 13 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 | // THE SOFTWARE. |
| 20 | |
| 21 | |
| 22 | /** |
| 23 | * @fileoverview Plug-in for providing unzoom-on-hover. |
| 24 | * |
| 25 | * @author konigsberg@google.com (Robert Konigsberg) |
| 26 | */ |
| 27 | Dygraph.Plugins.Unzoom = (function() { |
| 28 | |
| 29 | "use strict"; |
| 30 | |
| 31 | /** |
| 32 | * Create a new instance. |
| 33 | * |
| 34 | * @constructor |
| 35 | */ |
| 36 | var unzoom = function() { |
| 37 | this.button_ = null; |
| 38 | this.over_ = false; |
| 39 | }; |
| 40 | |
| 41 | unzoom.prototype.toString = function() { |
| 42 | return 'Unzoom Plugin'; |
| 43 | }; |
| 44 | |
| 45 | unzoom.prototype.activate = function(g) { |
| 46 | return { |
| 47 | willDrawChart: this.willDrawChart |
| 48 | }; |
| 49 | }; |
| 50 | |
| 51 | unzoom.prototype.willDrawChart = function(e) { |
| 52 | var g = e.dygraph; |
| 53 | |
| 54 | if (this.button_ != null) { |
| 55 | if (g.isZoomed() && this.over_) { |
| 56 | this.show(true); |
| 57 | } |
| 58 | return; |
| 59 | } |
| 60 | |
| 61 | this.button_ = document.createElement('button'); |
| 62 | this.button_.innerHTML = 'Unzoom'; |
| 63 | this.button_.style.display = 'none'; |
| 64 | this.button_.style.position = 'absolute'; |
| 65 | this.button_.style.top = '2px'; |
| 66 | this.button_.style.left = '59px'; |
| 67 | this.button_.style.zIndex = 1000; |
| 68 | var parent = g.graphDiv; |
| 69 | parent.insertBefore(this.button_, parent.firstChild); |
| 70 | |
| 71 | var self = this; |
| 72 | this.button_.onclick = function() { |
| 73 | // TODO(konigsberg): doUnzoom_ is private. |
| 74 | g.doUnzoom_(); |
| 75 | } |
| 76 | |
| 77 | g.addEvent(parent, 'mouseover', function() { |
| 78 | if (g.isZoomed()) { |
| 79 | self.show(true); |
| 80 | } |
| 81 | self.over_ = true; |
| 82 | }); |
| 83 | |
| 84 | g.addEvent(parent, 'mouseout', function() { |
| 85 | self.show(false); |
| 86 | self.over_ = false; |
| 87 | }); |
| 88 | }; |
| 89 | |
| 90 | unzoom.prototype.show = function(enabled) { |
| 91 | this.button_.style.display = enabled ? 'block' : 'none'; |
| 92 | }; |
| 93 | |
| 94 | unzoom.prototype.destroy = function() { |
| 95 | this.button_.parentElement.removeChild(this.button_); |
| 96 | }; |
| 97 | |
| 98 | return unzoom; |
| 99 | |
| 100 | })(); |