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8c5fe59e DV |
1 | <!DOCTYPE html> |
2 | <html> | |
3 | <head> | |
4 | <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9"> | |
5 | <title>Dygraphs Drawing Demo</title> | |
6 | <!--[if IE]> | |
7 | <script type="text/javascript" src="../excanvas.js"></script> | |
8 | <![endif]--> | |
9 | <script type="text/javascript" src="../strftime/strftime-min.js"></script> | |
10 | <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script> | |
11 | <script type="text/javascript" src="../dygraph-canvas.js"></script> | |
12 | <script type="text/javascript" src="../dygraph.js"></script> | |
13 | ||
14 | <script type="text/javascript"> | |
15 | var start_date = new Date("2002/12/29").getTime(); | |
16 | var end_date = new Date().getTime(); | |
17 | data = []; | |
18 | for (var d = start_date; d < end_date; d += 604800 * 1000) { | |
19 | var millis = d + 2 * 3600 * 1000; | |
20 | data.push( [ new Date(new Date(millis).strftime("%Y/%m/%d")), 50 ]); | |
21 | } | |
22 | </script> | |
23 | <style type="text/css"> | |
24 | #tool_zoom { | |
25 | background: url('drawing/tool-palette.png'); | |
26 | background-position-x: 0px; | |
27 | width: 32px; | |
28 | height: 33px; | |
29 | margin-left: 50px; | |
30 | display: inline-block; | |
31 | } | |
32 | #tool_pencil { | |
33 | background: url('drawing/tool-palette.png'); | |
34 | background-position-x: -32px; | |
35 | width: 32px; | |
36 | height: 33px; | |
37 | display: inline-block; | |
38 | } | |
39 | #tool_eraser { | |
40 | background: url('drawing/tool-palette.png'); | |
41 | background-position-x: -64px; | |
42 | width: 33px; | |
43 | height: 33px; | |
44 | display: inline-block; | |
45 | } | |
46 | #toolbar { | |
47 | display: inline-block; | |
48 | } | |
49 | </style> | |
50 | </head> | |
51 | <body> | |
52 | <h2>Time Series Drawing Demo</h2> | |
53 | <div id='toolbar'> | |
54 | <div id="tool_zoom" onClick='change_tool(this)'></div><div id="tool_pencil" onClick='change_tool(this)'></div><div id="tool_eraser" onClick='change_tool(this)'></div> | |
55 | </div> | |
56 | <div id="draw_div" style="width: 800px; height: 400px;"></div> | |
57 | ||
58 | <script type="text/javascript"> | |
59 | var isDrawing = false; | |
60 | var lastDrawRow = null, lastDrawValue = null; | |
61 | var tool = 'pencil'; | |
62 | var valueRange = [0, 100]; | |
63 | ||
64 | function setPoint(event, g, context) { | |
65 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(g.graphDiv); | |
66 | var canvasy = Dygraph.pageY(event) - Dygraph.findPosY(g.graphDiv); | |
67 | var xy = g.toDataCoords(canvasx, canvasy); | |
68 | var x = xy[0], value = xy[1]; | |
69 | var rows = g.numRows(); | |
70 | var closest_row = -1; | |
71 | var smallest_diff = -1; | |
72 | // TODO(danvk): binary search | |
73 | for (var row = 0; row < rows; row++) { | |
74 | var date = g.getValue(row, 0); // millis | |
75 | var diff = Math.abs(date - x); | |
76 | if (smallest_diff < 0 || diff < smallest_diff) { | |
77 | smallest_diff = diff; | |
78 | closest_row = row; | |
79 | } | |
80 | } | |
81 | ||
82 | if (closest_row != -1) { | |
83 | if (lastDrawRow === null) { | |
84 | lastDrawRow = closest_row; | |
85 | lastDrawValue = value; | |
86 | } | |
87 | var coeff = (value - lastDrawValue) / (closest_row - lastDrawRow); | |
88 | if (closest_row == lastDrawRow) coeff = 0.0; | |
89 | var minRow = Math.min(lastDrawRow, closest_row); | |
90 | var maxRow = Math.max(lastDrawRow, closest_row); | |
91 | for (var row = minRow; row <= maxRow; row++) { | |
92 | if (tool == 'pencil') { | |
93 | var val = lastDrawValue + coeff * (row - lastDrawRow); | |
94 | val = Math.max(valueRange[0], Math.min(val, valueRange[1])); | |
95 | data[row][1] = val; | |
96 | if (val == null || isNaN(val)) console.log(val); | |
97 | } else if (tool == 'eraser') { | |
98 | data[row][1] = null; | |
99 | } | |
100 | } | |
101 | lastDrawRow = closest_row; | |
102 | lastDrawValue = value; | |
103 | g.updateOptions({ file: data }); | |
104 | g.setSelection(closest_row); // prevents the dot from being finnicky. | |
105 | } | |
106 | } | |
107 | ||
108 | function finishDraw() { | |
109 | isDrawing = false; | |
110 | lastDrawRow = null; | |
111 | lastDrawValue = null; | |
112 | } | |
113 | ||
114 | function change_tool(tool_div) { | |
115 | var ids = ['tool_pencil', 'tool_zoom', 'tool_eraser']; | |
116 | for (var i = 0; i < ids.length; i++) { | |
117 | document.getElementById(ids[i]).style.backgroundPositionY = 0; | |
118 | } | |
119 | tool_div.style.backgroundPositionY = '-32px'; | |
120 | tool = tool_div.id.replace('tool_', ''); | |
121 | ||
122 | var dg_div = document.getElementById("draw_div"); | |
123 | if (tool == 'pencil') { | |
124 | dg_div.style.cursor = 'url(drawing/cursor-pencil.png) 2 30, auto'; | |
125 | } else if (tool == 'eraser') { | |
126 | dg_div.style.cursor = 'url(drawing/cursor-eraser.png) 10 30, auto'; | |
127 | } else if (tool == 'zoom') { | |
128 | dg_div.style.cursor = 'crosshair'; | |
129 | } | |
130 | } | |
131 | change_tool(document.getElementById("tool_pencil")); | |
132 | ||
133 | g = new Dygraph(document.getElementById("draw_div"), data, | |
134 | { | |
135 | valueRange: valueRange, | |
136 | labels: [ 'Date', 'Value' ], | |
137 | interactionModel: { | |
138 | mousedown: function (event, g, context) { | |
139 | if (tool == 'zoom') { | |
140 | Dygraph.defaultInteractionModel.mousedown(event, g, context); | |
141 | } else { | |
142 | // prevents mouse drags from selecting page text. | |
143 | if (event.preventDefault) { | |
144 | event.preventDefault(); // Firefox, Chrome, etc. | |
145 | } else { | |
146 | event.returnValue = false; // IE | |
147 | event.cancelBubble = true; | |
148 | } | |
149 | isDrawing = true; | |
150 | setPoint(event, g, context); | |
151 | } | |
152 | }, | |
153 | mousemove: function (event, g, context) { | |
154 | if (tool == 'zoom') { | |
155 | Dygraph.defaultInteractionModel.mousemove(event, g, context); | |
156 | } else { | |
157 | if (!isDrawing) return; | |
158 | setPoint(event, g, context); | |
159 | } | |
160 | }, | |
161 | mouseup: function(event, g, context) { | |
162 | if (tool == 'zoom') { | |
163 | Dygraph.defaultInteractionModel.mouseup(event, g, context); | |
164 | } else { | |
165 | finishDraw(); | |
166 | } | |
167 | }, | |
168 | mouseout: function(event, g, context) { | |
169 | if (tool == 'zoom') { | |
170 | Dygraph.defaultInteractionModel.mouseout(event, g, context); | |
171 | } | |
172 | }, | |
173 | dblclick: function(event, g, context) { | |
174 | Dygraph.defaultInteractionModel.dblclick(event, g, context); | |
175 | }, | |
176 | mousewheel: function(event, g, context) { | |
177 | var normal = event.detail ? event.detail * -1 : event.wheelDelta / 40; | |
178 | var percentage = normal / 50; | |
179 | var axis = g.xAxisRange(); | |
180 | var xOffset = g.toDomCoords(axis[0], null)[0]; | |
181 | var x = event.offsetX - xOffset; | |
182 | var w = g.toDomCoords(axis[1], null)[0] - xOffset; | |
183 | var xPct = w == 0 ? 0 : (x / w); | |
184 | ||
185 | var delta = axis[1] - axis[0]; | |
186 | var increment = delta * percentage; | |
187 | var foo = [increment * xPct, increment * (1 - xPct)]; | |
188 | var dateWindow = [ axis[0] + foo[0], axis[1] - foo[1] ]; | |
189 | ||
190 | g.updateOptions({ | |
191 | dateWindow: dateWindow | |
192 | }); | |
193 | Dygraph.cancelEvent(event); | |
194 | } | |
195 | }, | |
196 | strokeWidth: 1.5, | |
197 | gridLineColor: 'rgb(196, 196, 196)', | |
198 | drawYGrid: false, | |
199 | drawYAxis: false | |
200 | }); | |
201 | window.onmouseup = finishDraw; | |
202 | </script> | |
203 | ||
204 | <p style='font-size: 10pt'>Toolbar/cursor icons are CC-licensed from <a | |
205 | href="http://www.fatcow.com/free-icons">FatCow</a>.</p> | |
206 | </body> | |
207 | </html> |