Commit | Line | Data |
---|---|---|
0d216a60 | 1 | /** |
41da6a86 | 2 | * @license |
ec475f44 | 3 | * Copyright 2011 Paul Felix (paul.eric.felix@gmail.com) |
41da6a86 DV |
4 | * MIT-licensed (http://opensource.org/licenses/MIT) |
5 | */ | |
0cd1ad15 | 6 | /*global Dygraph:false,TouchEvent:false */ |
ccd9d7c2 PF |
7 | |
8 | /** | |
0d216a60 | 9 | * @fileoverview This file contains the RangeSelector plugin used to provide |
ccd9d7c2 PF |
10 | * a timeline range selector widget for dygraphs. |
11 | */ | |
12 | ||
758a629f | 13 | /*global Dygraph:false */ |
c0f54d4f DV |
14 | "use strict"; |
15 | ||
6ecc0739 DV |
16 | import * as utils from '../dygraph-utils'; |
17 | import DygraphInteraction from '../dygraph-interaction-model'; | |
2cfded32 | 18 | import IFrameTarp from '../iframe-tarp'; |
6ecc0739 | 19 | |
0d216a60 | 20 | var rangeSelector = function() { |
73c5deff | 21 | this.hasTouchInterface_ = typeof(TouchEvent) != 'undefined'; |
0c76da8d | 22 | this.isMobileDevice_ = /mobile|android/gi.test(navigator.appVersion); |
84074adc | 23 | this.interfaceCreated_ = false; |
0d216a60 PF |
24 | }; |
25 | ||
26 | rangeSelector.prototype.toString = function() { | |
27 | return "RangeSelector Plugin"; | |
28 | }; | |
29 | ||
30 | rangeSelector.prototype.activate = function(dygraph) { | |
31 | this.dygraph_ = dygraph; | |
ec475f44 | 32 | if (this.getOption_('showRangeSelector')) { |
0d216a60 PF |
33 | this.createInterface_(); |
34 | } | |
35 | return { | |
36 | layout: this.reserveSpace_, | |
37 | predraw: this.renderStaticLayer_, | |
38 | didDrawChart: this.renderInteractiveLayer_ | |
39 | }; | |
40 | }; | |
41 | ||
42 | rangeSelector.prototype.destroy = function() { | |
43 | this.bgcanvas_ = null; | |
44 | this.fgcanvas_ = null; | |
45 | this.leftZoomHandle_ = null; | |
46 | this.rightZoomHandle_ = null; | |
0d216a60 PF |
47 | }; |
48 | ||
49 | //------------------------------------------------------------------ | |
50 | // Private methods | |
51 | //------------------------------------------------------------------ | |
52 | ||
0a0885d1 DV |
53 | rangeSelector.prototype.getOption_ = function(name, opt_series) { |
54 | return this.dygraph_.getOption(name, opt_series); | |
ec475f44 PF |
55 | }; |
56 | ||
57 | rangeSelector.prototype.setDefaultOption_ = function(name, value) { | |
46fd9089 | 58 | this.dygraph_.attrs_[name] = value; |
0d216a60 PF |
59 | }; |
60 | ||
61 | /** | |
62 | * @private | |
63 | * Creates the range selector elements and adds them to the graph. | |
64 | */ | |
65 | rangeSelector.prototype.createInterface_ = function() { | |
ccd9d7c2 PF |
66 | this.createCanvases_(); |
67 | this.createZoomHandles_(); | |
68 | this.initInteraction_(); | |
0d216a60 PF |
69 | |
70 | // Range selector and animatedZooms have a bad interaction. See issue 359. | |
ec475f44 | 71 | if (this.getOption_('animatedZooms')) { |
8a68db7d | 72 | console.warn('Animated zooms and range selector are not compatible; disabling animatedZooms.'); |
ec475f44 | 73 | this.dygraph_.updateOptions({animatedZooms: false}, true); |
0d216a60 PF |
74 | } |
75 | ||
84074adc | 76 | this.interfaceCreated_ = true; |
0d216a60 | 77 | this.addToGraph_(); |
ccd9d7c2 PF |
78 | }; |
79 | ||
80 | /** | |
0d216a60 PF |
81 | * @private |
82 | * Adds the range selector to the graph. | |
ccd9d7c2 | 83 | */ |
0d216a60 | 84 | rangeSelector.prototype.addToGraph_ = function() { |
84074adc | 85 | var graphDiv = this.graphDiv_ = this.dygraph_.graphDiv; |
ccd9d7c2 PF |
86 | graphDiv.appendChild(this.bgcanvas_); |
87 | graphDiv.appendChild(this.fgcanvas_); | |
88 | graphDiv.appendChild(this.leftZoomHandle_); | |
89 | graphDiv.appendChild(this.rightZoomHandle_); | |
0d216a60 PF |
90 | }; |
91 | ||
92 | /** | |
93 | * @private | |
94 | * Removes the range selector from the graph. | |
95 | */ | |
96 | rangeSelector.prototype.removeFromGraph_ = function() { | |
ec475f44 | 97 | var graphDiv = this.graphDiv_; |
0d216a60 PF |
98 | graphDiv.removeChild(this.bgcanvas_); |
99 | graphDiv.removeChild(this.fgcanvas_); | |
100 | graphDiv.removeChild(this.leftZoomHandle_); | |
101 | graphDiv.removeChild(this.rightZoomHandle_); | |
84074adc | 102 | this.graphDiv_ = null; |
0d216a60 PF |
103 | }; |
104 | ||
105 | /** | |
106 | * @private | |
107 | * Called by Layout to allow range selector to reserve its space. | |
108 | */ | |
109 | rangeSelector.prototype.reserveSpace_ = function(e) { | |
ec475f44 PF |
110 | if (this.getOption_('showRangeSelector')) { |
111 | e.reserveSpaceBottom(this.getOption_('rangeSelectorHeight') + 4); | |
0d216a60 | 112 | } |
ccd9d7c2 PF |
113 | }; |
114 | ||
115 | /** | |
0d216a60 PF |
116 | * @private |
117 | * Renders the static portion of the range selector at the predraw stage. | |
ccd9d7c2 | 118 | */ |
0d216a60 | 119 | rangeSelector.prototype.renderStaticLayer_ = function() { |
84074adc | 120 | if (!this.updateVisibility_()) { |
0d216a60 PF |
121 | return; |
122 | } | |
ccd9d7c2 PF |
123 | this.resize_(); |
124 | this.drawStaticLayer_(); | |
125 | }; | |
126 | ||
127 | /** | |
0d216a60 PF |
128 | * @private |
129 | * Renders the interactive portion of the range selector after the chart has been drawn. | |
ccd9d7c2 | 130 | */ |
0d216a60 | 131 | rangeSelector.prototype.renderInteractiveLayer_ = function() { |
84074adc | 132 | if (!this.updateVisibility_() || this.isChangingRange_) { |
ccd9d7c2 PF |
133 | return; |
134 | } | |
ccd9d7c2 PF |
135 | this.placeZoomHandles_(); |
136 | this.drawInteractiveLayer_(); | |
137 | }; | |
138 | ||
139 | /** | |
140 | * @private | |
84074adc | 141 | * Check to see if the range selector is enabled/disabled and update visibility accordingly. |
0d216a60 | 142 | */ |
84074adc | 143 | rangeSelector.prototype.updateVisibility_ = function() { |
ec475f44 | 144 | var enabled = this.getOption_('showRangeSelector'); |
0d216a60 | 145 | if (enabled) { |
84074adc | 146 | if (!this.interfaceCreated_) { |
0d216a60 | 147 | this.createInterface_(); |
84074adc | 148 | } else if (!this.graphDiv_ || !this.graphDiv_.parentNode) { |
0d216a60 PF |
149 | this.addToGraph_(); |
150 | } | |
84074adc | 151 | } else if (this.graphDiv_) { |
0d216a60 PF |
152 | this.removeFromGraph_(); |
153 | var dygraph = this.dygraph_; | |
154 | setTimeout(function() { dygraph.width_ = 0; dygraph.resize(); }, 1); | |
155 | } | |
156 | return enabled; | |
83b0c192 | 157 | }; |
0d216a60 PF |
158 | |
159 | /** | |
160 | * @private | |
ccd9d7c2 PF |
161 | * Resizes the range selector. |
162 | */ | |
0d216a60 | 163 | rangeSelector.prototype.resize_ = function() { |
64f1c4df JV |
164 | function setElementRect(canvas, context, rect, pixelRatioOption) { |
165 | var canvasScale = pixelRatioOption || utils.getContextPixelRatio(context); | |
3a0e53a4 | 166 | |
ccd9d7c2 PF |
167 | canvas.style.top = rect.y + 'px'; |
168 | canvas.style.left = rect.x + 'px'; | |
3a0e53a4 AK |
169 | canvas.width = rect.w * canvasScale; |
170 | canvas.height = rect.h * canvasScale; | |
171 | canvas.style.width = rect.w + 'px'; | |
172 | canvas.style.height = rect.h + 'px'; | |
173 | ||
174 | if(canvasScale != 1) { | |
175 | context.scale(canvasScale, canvasScale); | |
176 | } | |
758a629f | 177 | } |
ccd9d7c2 | 178 | |
84074adc | 179 | var plotArea = this.dygraph_.layout_.getPlotArea(); |
b77d7a56 | 180 | |
003a590a | 181 | var xAxisLabelHeight = 0; |
464b5f50 | 182 | if (this.dygraph_.getOptionForAxis('drawAxis', 'x')) { |
003a590a | 183 | xAxisLabelHeight = this.getOption_('xAxisHeight') || (this.getOption_('axisLabelFontSize') + 2 * this.getOption_('axisTickSize')); |
184 | } | |
ccd9d7c2 PF |
185 | this.canvasRect_ = { |
186 | x: plotArea.x, | |
187 | y: plotArea.y + plotArea.h + xAxisLabelHeight + 4, | |
188 | w: plotArea.w, | |
ec475f44 | 189 | h: this.getOption_('rangeSelectorHeight') |
ccd9d7c2 PF |
190 | }; |
191 | ||
64f1c4df JV |
192 | var pixelRatioOption = this.dygraph_.getNumericOption('pixelRatio'); |
193 | setElementRect(this.bgcanvas_, this.bgcanvas_ctx_, this.canvasRect_, pixelRatioOption); | |
194 | setElementRect(this.fgcanvas_, this.fgcanvas_ctx_, this.canvasRect_, pixelRatioOption); | |
ccd9d7c2 PF |
195 | }; |
196 | ||
ccd9d7c2 PF |
197 | /** |
198 | * @private | |
199 | * Creates the background and foreground canvases. | |
200 | */ | |
0d216a60 | 201 | rangeSelector.prototype.createCanvases_ = function() { |
6ecc0739 | 202 | this.bgcanvas_ = utils.createCanvas(); |
88c4a47e | 203 | this.bgcanvas_.className = 'dygraph-rangesel-bgcanvas'; |
ccd9d7c2 | 204 | this.bgcanvas_.style.position = 'absolute'; |
920208fb | 205 | this.bgcanvas_.style.zIndex = 9; |
6ecc0739 | 206 | this.bgcanvas_ctx_ = utils.getContext(this.bgcanvas_); |
ccd9d7c2 | 207 | |
6ecc0739 | 208 | this.fgcanvas_ = utils.createCanvas(); |
88c4a47e | 209 | this.fgcanvas_.className = 'dygraph-rangesel-fgcanvas'; |
ccd9d7c2 | 210 | this.fgcanvas_.style.position = 'absolute'; |
920208fb | 211 | this.fgcanvas_.style.zIndex = 9; |
ccd9d7c2 | 212 | this.fgcanvas_.style.cursor = 'default'; |
6ecc0739 | 213 | this.fgcanvas_ctx_ = utils.getContext(this.fgcanvas_); |
ccd9d7c2 PF |
214 | }; |
215 | ||
216 | /** | |
217 | * @private | |
218 | * Creates the zoom handle elements. | |
219 | */ | |
0d216a60 | 220 | rangeSelector.prototype.createZoomHandles_ = function() { |
ccd9d7c2 | 221 | var img = new Image(); |
88c4a47e | 222 | img.className = 'dygraph-rangesel-zoomhandle'; |
ccd9d7c2 | 223 | img.style.position = 'absolute'; |
920208fb | 224 | img.style.zIndex = 10; |
ccd9d7c2 PF |
225 | img.style.visibility = 'hidden'; // Initially hidden so they don't show up in the wrong place. |
226 | img.style.cursor = 'col-resize'; | |
920e93f2 DV |
227 | // TODO: change image to more options |
228 | img.width = 9; | |
229 | img.height = 16; | |
230 | img.src = 'data:image/png;base64,' + | |
758a629f DV |
231 | 'iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAA' + |
232 | 'zwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENv' + | |
233 | 'bW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl' + | |
234 | '6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7s' + | |
235 | 'qSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII='; | |
ccd9d7c2 | 236 | |
0c76da8d | 237 | if (this.isMobileDevice_) { |
73c5deff PF |
238 | img.width *= 2; |
239 | img.height *= 2; | |
240 | } | |
241 | ||
ccd9d7c2 PF |
242 | this.leftZoomHandle_ = img; |
243 | this.rightZoomHandle_ = img.cloneNode(false); | |
244 | }; | |
245 | ||
246 | /** | |
247 | * @private | |
248 | * Sets up the interaction for the range selector. | |
249 | */ | |
0d216a60 | 250 | rangeSelector.prototype.initInteraction_ = function() { |
ccd9d7c2 | 251 | var self = this; |
bcf7f810 | 252 | var topElem = document; |
2871344a | 253 | var clientXLast = 0; |
ccd9d7c2 PF |
254 | var handle = null; |
255 | var isZooming = false; | |
256 | var isPanning = false; | |
9901b0c1 | 257 | var dynamic = !this.isMobileDevice_; |
ccd9d7c2 | 258 | |
2bad4d92 DV |
259 | // We cover iframes during mouse interactions. See comments in |
260 | // dygraph-utils.js for more info on why this is a good idea. | |
2cfded32 | 261 | var tarp = new IFrameTarp(); |
2bad4d92 | 262 | |
758a629f DV |
263 | // functions, defined below. Defining them this way (rather than with |
264 | // "function foo() {...}" makes JSHint happy. | |
265 | var toXDataWindow, onZoomStart, onZoom, onZoomEnd, doZoom, isMouseInPanZone, | |
2871344a | 266 | onPanStart, onPan, onPanEnd, doPan, onCanvasHover; |
758a629f | 267 | |
73c5deff PF |
268 | // Touch event functions |
269 | var onZoomHandleTouchEvent, onCanvasTouchEvent, addTouchEvents; | |
270 | ||
758a629f | 271 | toXDataWindow = function(zoomHandleStatus) { |
ccd9d7c2 PF |
272 | var xDataLimits = self.dygraph_.xAxisExtremes(); |
273 | var fact = (xDataLimits[1] - xDataLimits[0])/self.canvasRect_.w; | |
274 | var xDataMin = xDataLimits[0] + (zoomHandleStatus.leftHandlePos - self.canvasRect_.x)*fact; | |
275 | var xDataMax = xDataLimits[0] + (zoomHandleStatus.rightHandlePos - self.canvasRect_.x)*fact; | |
276 | return [xDataMin, xDataMax]; | |
277 | }; | |
278 | ||
758a629f | 279 | onZoomStart = function(e) { |
6ecc0739 | 280 | utils.cancelEvent(e); |
ccd9d7c2 | 281 | isZooming = true; |
2871344a | 282 | clientXLast = e.clientX; |
ccd9d7c2 | 283 | handle = e.target ? e.target : e.srcElement; |
6835cab8 | 284 | if (e.type === 'mousedown' || e.type === 'dragstart') { |
4f41df5a | 285 | // These events are removed manually. |
6ecc0739 DV |
286 | utils.addEvent(topElem, 'mousemove', onZoom); |
287 | utils.addEvent(topElem, 'mouseup', onZoomEnd); | |
6835cab8 | 288 | } |
ccd9d7c2 | 289 | self.fgcanvas_.style.cursor = 'col-resize'; |
2bad4d92 | 290 | tarp.cover(); |
0c76da8d | 291 | return true; |
ccd9d7c2 PF |
292 | }; |
293 | ||
758a629f | 294 | onZoom = function(e) { |
ccd9d7c2 | 295 | if (!isZooming) { |
0c76da8d | 296 | return false; |
ccd9d7c2 | 297 | } |
6ecc0739 | 298 | utils.cancelEvent(e); |
6835cab8 | 299 | |
2871344a | 300 | var delX = e.clientX - clientXLast; |
6835cab8 | 301 | if (Math.abs(delX) < 4) { |
0c76da8d | 302 | return true; |
ccd9d7c2 | 303 | } |
2871344a | 304 | clientXLast = e.clientX; |
0c76da8d PF |
305 | |
306 | // Move handle. | |
ccd9d7c2 | 307 | var zoomHandleStatus = self.getZoomHandleStatus_(); |
758a629f | 308 | var newPos; |
ccd9d7c2 | 309 | if (handle == self.leftZoomHandle_) { |
2871344a | 310 | newPos = zoomHandleStatus.leftHandlePos + delX; |
ccd9d7c2 PF |
311 | newPos = Math.min(newPos, zoomHandleStatus.rightHandlePos - handle.width - 3); |
312 | newPos = Math.max(newPos, self.canvasRect_.x); | |
313 | } else { | |
2871344a | 314 | newPos = zoomHandleStatus.rightHandlePos + delX; |
ccd9d7c2 PF |
315 | newPos = Math.min(newPos, self.canvasRect_.x + self.canvasRect_.w); |
316 | newPos = Math.max(newPos, zoomHandleStatus.leftHandlePos + handle.width + 3); | |
317 | } | |
920208fb | 318 | var halfHandleWidth = handle.width/2; |
ccd9d7c2 PF |
319 | handle.style.left = (newPos - halfHandleWidth) + 'px'; |
320 | self.drawInteractiveLayer_(); | |
321 | ||
9901b0c1 | 322 | // Zoom on the fly. |
73c5deff | 323 | if (dynamic) { |
ccd9d7c2 PF |
324 | doZoom(); |
325 | } | |
0c76da8d | 326 | return true; |
ccd9d7c2 PF |
327 | }; |
328 | ||
758a629f | 329 | onZoomEnd = function(e) { |
ccd9d7c2 | 330 | if (!isZooming) { |
0c76da8d | 331 | return false; |
ccd9d7c2 PF |
332 | } |
333 | isZooming = false; | |
2bad4d92 | 334 | tarp.uncover(); |
6ecc0739 DV |
335 | utils.removeEvent(topElem, 'mousemove', onZoom); |
336 | utils.removeEvent(topElem, 'mouseup', onZoomEnd); | |
ccd9d7c2 PF |
337 | self.fgcanvas_.style.cursor = 'default'; |
338 | ||
9901b0c1 | 339 | // If on a slower device, zoom now. |
73c5deff | 340 | if (!dynamic) { |
ccd9d7c2 PF |
341 | doZoom(); |
342 | } | |
0c76da8d | 343 | return true; |
ccd9d7c2 PF |
344 | }; |
345 | ||
758a629f | 346 | doZoom = function() { |
ccd9d7c2 PF |
347 | try { |
348 | var zoomHandleStatus = self.getZoomHandleStatus_(); | |
349 | self.isChangingRange_ = true; | |
350 | if (!zoomHandleStatus.isZoomed) { | |
e4f6e11a | 351 | self.dygraph_.resetZoom(); |
ccd9d7c2 PF |
352 | } else { |
353 | var xDataWindow = toXDataWindow(zoomHandleStatus); | |
354 | self.dygraph_.doZoomXDates_(xDataWindow[0], xDataWindow[1]); | |
355 | } | |
356 | } finally { | |
357 | self.isChangingRange_ = false; | |
358 | } | |
359 | }; | |
360 | ||
758a629f | 361 | isMouseInPanZone = function(e) { |
9901b0c1 DV |
362 | var rect = self.leftZoomHandle_.getBoundingClientRect(); |
363 | var leftHandleClientX = rect.left + rect.width/2; | |
364 | rect = self.rightZoomHandle_.getBoundingClientRect(); | |
365 | var rightHandleClientX = rect.left + rect.width/2; | |
366 | return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX); | |
ccd9d7c2 PF |
367 | }; |
368 | ||
758a629f | 369 | onPanStart = function(e) { |
ccd9d7c2 | 370 | if (!isPanning && isMouseInPanZone(e) && self.getZoomHandleStatus_().isZoomed) { |
6ecc0739 | 371 | utils.cancelEvent(e); |
ccd9d7c2 | 372 | isPanning = true; |
2871344a | 373 | clientXLast = e.clientX; |
6835cab8 | 374 | if (e.type === 'mousedown') { |
4f41df5a | 375 | // These events are removed manually. |
6ecc0739 DV |
376 | utils.addEvent(topElem, 'mousemove', onPan); |
377 | utils.addEvent(topElem, 'mouseup', onPanEnd); | |
6835cab8 | 378 | } |
0c76da8d | 379 | return true; |
ccd9d7c2 | 380 | } |
0c76da8d | 381 | return false; |
ccd9d7c2 PF |
382 | }; |
383 | ||
758a629f | 384 | onPan = function(e) { |
ccd9d7c2 | 385 | if (!isPanning) { |
0c76da8d | 386 | return false; |
ccd9d7c2 | 387 | } |
6ecc0739 | 388 | utils.cancelEvent(e); |
ccd9d7c2 | 389 | |
2871344a | 390 | var delX = e.clientX - clientXLast; |
ccd9d7c2 | 391 | if (Math.abs(delX) < 4) { |
0c76da8d | 392 | return true; |
ccd9d7c2 | 393 | } |
2871344a | 394 | clientXLast = e.clientX; |
ccd9d7c2 PF |
395 | |
396 | // Move range view | |
397 | var zoomHandleStatus = self.getZoomHandleStatus_(); | |
398 | var leftHandlePos = zoomHandleStatus.leftHandlePos; | |
399 | var rightHandlePos = zoomHandleStatus.rightHandlePos; | |
400 | var rangeSize = rightHandlePos - leftHandlePos; | |
401 | if (leftHandlePos + delX <= self.canvasRect_.x) { | |
402 | leftHandlePos = self.canvasRect_.x; | |
403 | rightHandlePos = leftHandlePos + rangeSize; | |
404 | } else if (rightHandlePos + delX >= self.canvasRect_.x + self.canvasRect_.w) { | |
405 | rightHandlePos = self.canvasRect_.x + self.canvasRect_.w; | |
406 | leftHandlePos = rightHandlePos - rangeSize; | |
407 | } else { | |
408 | leftHandlePos += delX; | |
409 | rightHandlePos += delX; | |
410 | } | |
920208fb | 411 | var halfHandleWidth = self.leftZoomHandle_.width/2; |
ccd9d7c2 PF |
412 | self.leftZoomHandle_.style.left = (leftHandlePos - halfHandleWidth) + 'px'; |
413 | self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px'; | |
414 | self.drawInteractiveLayer_(); | |
415 | ||
9901b0c1 | 416 | // Do pan on the fly. |
73c5deff | 417 | if (dynamic) { |
ccd9d7c2 PF |
418 | doPan(); |
419 | } | |
0c76da8d | 420 | return true; |
ccd9d7c2 PF |
421 | }; |
422 | ||
758a629f | 423 | onPanEnd = function(e) { |
ccd9d7c2 | 424 | if (!isPanning) { |
0c76da8d | 425 | return false; |
ccd9d7c2 PF |
426 | } |
427 | isPanning = false; | |
6ecc0739 DV |
428 | utils.removeEvent(topElem, 'mousemove', onPan); |
429 | utils.removeEvent(topElem, 'mouseup', onPanEnd); | |
9901b0c1 | 430 | // If on a slower device, do pan now. |
73c5deff | 431 | if (!dynamic) { |
ccd9d7c2 PF |
432 | doPan(); |
433 | } | |
0c76da8d | 434 | return true; |
ccd9d7c2 PF |
435 | }; |
436 | ||
758a629f | 437 | doPan = function() { |
ccd9d7c2 PF |
438 | try { |
439 | self.isChangingRange_ = true; | |
440 | self.dygraph_.dateWindow_ = toXDataWindow(self.getZoomHandleStatus_()); | |
441 | self.dygraph_.drawGraph_(false); | |
442 | } finally { | |
443 | self.isChangingRange_ = false; | |
444 | } | |
445 | }; | |
446 | ||
6835cab8 | 447 | onCanvasHover = function(e) { |
ccd9d7c2 PF |
448 | if (isZooming || isPanning) { |
449 | return; | |
450 | } | |
451 | var cursor = isMouseInPanZone(e) ? 'move' : 'default'; | |
452 | if (cursor != self.fgcanvas_.style.cursor) { | |
453 | self.fgcanvas_.style.cursor = cursor; | |
454 | } | |
455 | }; | |
456 | ||
73c5deff | 457 | onZoomHandleTouchEvent = function(e) { |
0c76da8d PF |
458 | if (e.type == 'touchstart' && e.targetTouches.length == 1) { |
459 | if (onZoomStart(e.targetTouches[0])) { | |
6ecc0739 | 460 | utils.cancelEvent(e); |
0c76da8d PF |
461 | } |
462 | } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { | |
463 | if (onZoom(e.targetTouches[0])) { | |
6ecc0739 | 464 | utils.cancelEvent(e); |
0c76da8d | 465 | } |
73c5deff PF |
466 | } else { |
467 | onZoomEnd(e); | |
468 | } | |
469 | }; | |
470 | ||
471 | onCanvasTouchEvent = function(e) { | |
0c76da8d PF |
472 | if (e.type == 'touchstart' && e.targetTouches.length == 1) { |
473 | if (onPanStart(e.targetTouches[0])) { | |
6ecc0739 | 474 | utils.cancelEvent(e); |
0c76da8d PF |
475 | } |
476 | } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { | |
477 | if (onPan(e.targetTouches[0])) { | |
6ecc0739 | 478 | utils.cancelEvent(e); |
0c76da8d | 479 | } |
73c5deff PF |
480 | } else { |
481 | onPanEnd(e); | |
482 | } | |
483 | }; | |
484 | ||
485 | addTouchEvents = function(elem, fn) { | |
6a4587ac RK |
486 | var types = ['touchstart', 'touchend', 'touchmove', 'touchcancel']; |
487 | for (var i = 0; i < types.length; i++) { | |
aeca29ac | 488 | self.dygraph_.addAndTrackEvent(elem, types[i], fn); |
6a4587ac | 489 | } |
73c5deff PF |
490 | }; |
491 | ||
6ecc0739 | 492 | this.setDefaultOption_('interactionModel', DygraphInteraction.dragIsPanInteractionModel); |
ec475f44 | 493 | this.setDefaultOption_('panEdgeFraction', 0.0001); |
ccd9d7c2 | 494 | |
920208fb | 495 | var dragStartEvent = window.opera ? 'mousedown' : 'dragstart'; |
aeca29ac RK |
496 | this.dygraph_.addAndTrackEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart); |
497 | this.dygraph_.addAndTrackEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart); | |
920208fb | 498 | |
9901b0c1 DV |
499 | this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousedown', onPanStart); |
500 | this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousemove', onCanvasHover); | |
73c5deff PF |
501 | |
502 | // Touch events | |
503 | if (this.hasTouchInterface_) { | |
504 | addTouchEvents(this.leftZoomHandle_, onZoomHandleTouchEvent); | |
505 | addTouchEvents(this.rightZoomHandle_, onZoomHandleTouchEvent); | |
506 | addTouchEvents(this.fgcanvas_, onCanvasTouchEvent); | |
507 | } | |
ccd9d7c2 PF |
508 | }; |
509 | ||
510 | /** | |
511 | * @private | |
512 | * Draws the static layer in the background canvas. | |
513 | */ | |
0d216a60 | 514 | rangeSelector.prototype.drawStaticLayer_ = function() { |
ccd9d7c2 PF |
515 | var ctx = this.bgcanvas_ctx_; |
516 | ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); | |
db6a9f5a | 517 | try { |
ccd9d7c2 | 518 | this.drawMiniPlot_(); |
db6a9f5a | 519 | } catch(ex) { |
8a68db7d | 520 | console.warn(ex); |
db6a9f5a | 521 | } |
920208fb | 522 | |
758a629f | 523 | var margin = 0.5; |
fb24d32c | 524 | this.bgcanvas_ctx_.lineWidth = this.getOption_('rangeSelectorBackgroundLineWidth'); |
525 | ctx.strokeStyle = this.getOption_('rangeSelectorBackgroundStrokeColor'); | |
920208fb PF |
526 | ctx.beginPath(); |
527 | ctx.moveTo(margin, margin); | |
528 | ctx.lineTo(margin, this.canvasRect_.h-margin); | |
529 | ctx.lineTo(this.canvasRect_.w-margin, this.canvasRect_.h-margin); | |
530 | ctx.lineTo(this.canvasRect_.w-margin, margin); | |
531 | ctx.stroke(); | |
ccd9d7c2 PF |
532 | }; |
533 | ||
534 | ||
535 | /** | |
536 | * @private | |
537 | * Draws the mini plot in the background canvas. | |
538 | */ | |
0d216a60 | 539 | rangeSelector.prototype.drawMiniPlot_ = function() { |
ec475f44 | 540 | var fillStyle = this.getOption_('rangeSelectorPlotFillColor'); |
79cb28dd | 541 | var fillGradientStyle = this.getOption_('rangeSelectorPlotFillGradientColor'); |
ec475f44 | 542 | var strokeStyle = this.getOption_('rangeSelectorPlotStrokeColor'); |
ccd9d7c2 PF |
543 | if (!fillStyle && !strokeStyle) { |
544 | return; | |
545 | } | |
546 | ||
ec475f44 | 547 | var stepPlot = this.getOption_('stepPlot'); |
e03d443c | 548 | |
ccd9d7c2 PF |
549 | var combinedSeriesData = this.computeCombinedSeriesAndLimits_(); |
550 | var yRange = combinedSeriesData.yMax - combinedSeriesData.yMin; | |
551 | ||
552 | // Draw the mini plot. | |
553 | var ctx = this.bgcanvas_ctx_; | |
758a629f | 554 | var margin = 0.5; |
ccd9d7c2 PF |
555 | |
556 | var xExtremes = this.dygraph_.xAxisExtremes(); | |
557 | var xRange = Math.max(xExtremes[1] - xExtremes[0], 1.e-30); | |
558 | var xFact = (this.canvasRect_.w - margin)/xRange; | |
559 | var yFact = (this.canvasRect_.h - margin)/yRange; | |
560 | var canvasWidth = this.canvasRect_.w - margin; | |
561 | var canvasHeight = this.canvasRect_.h - margin; | |
562 | ||
e03d443c WB |
563 | var prevX = null, prevY = null; |
564 | ||
ccd9d7c2 PF |
565 | ctx.beginPath(); |
566 | ctx.moveTo(margin, canvasHeight); | |
567 | for (var i = 0; i < combinedSeriesData.data.length; i++) { | |
568 | var dataPoint = combinedSeriesData.data[i]; | |
e03d443c WB |
569 | var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN); |
570 | var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN); | |
5575fa36 DV |
571 | |
572 | // Skip points that don't change the x-value. Overly fine-grained points | |
573 | // can cause major slowdowns with the ctx.fill() call below. | |
69c9b9f2 | 574 | if (!stepPlot && prevX !== null && Math.round(x) == Math.round(prevX)) { |
5575fa36 DV |
575 | continue; |
576 | } | |
577 | ||
ccd9d7c2 | 578 | if (isFinite(x) && isFinite(y)) { |
e03d443c | 579 | if(prevX === null) { |
87196f1b WB |
580 | ctx.lineTo(x, canvasHeight); |
581 | } | |
582 | else if (stepPlot) { | |
583 | ctx.lineTo(x, prevY); | |
584 | } | |
ccd9d7c2 | 585 | ctx.lineTo(x, y); |
e03d443c | 586 | prevX = x; |
87196f1b | 587 | prevY = y; |
ccd9d7c2 | 588 | } |
e03d443c | 589 | else { |
87196f1b WB |
590 | if(prevX !== null) { |
591 | if (stepPlot) { | |
592 | ctx.lineTo(x, prevY); | |
593 | ctx.lineTo(x, canvasHeight); | |
594 | } | |
595 | else { | |
596 | ctx.lineTo(prevX, canvasHeight); | |
597 | } | |
598 | } | |
599 | prevX = prevY = null; | |
600 | } | |
ccd9d7c2 PF |
601 | } |
602 | ctx.lineTo(canvasWidth, canvasHeight); | |
603 | ctx.closePath(); | |
604 | ||
605 | if (fillStyle) { | |
606 | var lingrad = this.bgcanvas_ctx_.createLinearGradient(0, 0, 0, canvasHeight); | |
79cb28dd | 607 | if (fillGradientStyle) { |
608 | lingrad.addColorStop(0, fillGradientStyle); | |
609 | } | |
ccd9d7c2 PF |
610 | lingrad.addColorStop(1, fillStyle); |
611 | this.bgcanvas_ctx_.fillStyle = lingrad; | |
612 | ctx.fill(); | |
613 | } | |
614 | ||
615 | if (strokeStyle) { | |
616 | this.bgcanvas_ctx_.strokeStyle = strokeStyle; | |
b77d7a56 | 617 | this.bgcanvas_ctx_.lineWidth = this.getOption_('rangeSelectorPlotLineWidth'); |
ccd9d7c2 PF |
618 | ctx.stroke(); |
619 | } | |
620 | }; | |
621 | ||
622 | /** | |
623 | * @private | |
dcebad80 DV |
624 | * Computes and returns the combined series data along with min/max for the mini plot. |
625 | * The combined series consists of averaged values for all series. | |
626 | * When series have error bars, the error bars are ignored. | |
627 | * @return {Object} An object containing combined series array, ymin, ymax. | |
ccd9d7c2 | 628 | */ |
0d216a60 | 629 | rangeSelector.prototype.computeCombinedSeriesAndLimits_ = function() { |
dcebad80 | 630 | var g = this.dygraph_; |
ec475f44 | 631 | var logscale = this.getOption_('logscale'); |
bcf7f810 | 632 | var i; |
ccd9d7c2 | 633 | |
0a0885d1 DV |
634 | // Select series to combine. By default, all series are combined. |
635 | var numColumns = g.numColumns(); | |
636 | var labels = g.getLabels(); | |
637 | var includeSeries = new Array(numColumns); | |
638 | var anySet = false; | |
6ed703fd DV |
639 | var visibility = g.visibility(); |
640 | var inclusion = []; | |
641 | ||
0a0885d1 DV |
642 | for (i = 1; i < numColumns; i++) { |
643 | var include = this.getOption_('showInRangeSelector', labels[i]); | |
6ed703fd | 644 | inclusion.push(include); |
0a0885d1 DV |
645 | if (include !== null) anySet = true; // it's set explicitly for this series |
646 | } | |
6ed703fd DV |
647 | |
648 | if (anySet) { | |
649 | for (i = 1; i < numColumns; i++) { | |
650 | includeSeries[i] = inclusion[i - 1]; | |
651 | } | |
652 | } else { | |
653 | for (i = 1; i < numColumns; i++) { | |
654 | includeSeries[i] = visibility[i - 1]; | |
655 | } | |
1085dbce PP |
656 | } |
657 | ||
0a0885d1 | 658 | // Create a combined series (average of selected series values). |
dcebad80 DV |
659 | // TODO(danvk): short-circuit if there's only one series. |
660 | var rolledSeries = []; | |
661 | var dataHandler = g.dataHandler_; | |
662 | var options = g.attributes_; | |
0a0885d1 DV |
663 | for (i = 1; i < g.numColumns(); i++) { |
664 | if (!includeSeries[i]) continue; | |
665 | var series = dataHandler.extractSeries(g.rawData_, i, options); | |
dcebad80 DV |
666 | if (g.rollPeriod() > 1) { |
667 | series = dataHandler.rollingAverage(series, g.rollPeriod(), options); | |
ccd9d7c2 | 668 | } |
b77d7a56 | 669 | |
dcebad80 | 670 | rolledSeries.push(series); |
ccd9d7c2 PF |
671 | } |
672 | ||
dcebad80 DV |
673 | var combinedSeries = []; |
674 | for (i = 0; i < rolledSeries[0].length; i++) { | |
675 | var sum = 0; | |
676 | var count = 0; | |
bcf7f810 | 677 | for (var j = 0; j < rolledSeries.length; j++) { |
dcebad80 DV |
678 | var y = rolledSeries[j][i][1]; |
679 | if (y === null || isNaN(y)) continue; | |
680 | count++; | |
681 | sum += y; | |
ccd9d7c2 | 682 | } |
dcebad80 | 683 | combinedSeries.push([rolledSeries[0][i][0], sum / count]); |
ccd9d7c2 PF |
684 | } |
685 | ||
686 | // Compute the y range. | |
687 | var yMin = Number.MAX_VALUE; | |
688 | var yMax = -Number.MAX_VALUE; | |
758a629f | 689 | for (i = 0; i < combinedSeries.length; i++) { |
c0430a23 | 690 | var yVal = combinedSeries[i][1]; |
758a629f | 691 | if (yVal !== null && isFinite(yVal) && (!logscale || yVal > 0)) { |
ccd9d7c2 PF |
692 | yMin = Math.min(yMin, yVal); |
693 | yMax = Math.max(yMax, yVal); | |
694 | } | |
695 | } | |
696 | ||
697 | // Convert Y data to log scale if needed. | |
698 | // Also, expand the Y range to compress the mini plot a little. | |
758a629f | 699 | var extraPercent = 0.25; |
ccd9d7c2 | 700 | if (logscale) { |
6ecc0739 | 701 | yMax = utils.log10(yMax); |
ccd9d7c2 | 702 | yMax += yMax*extraPercent; |
6ecc0739 | 703 | yMin = utils.log10(yMin); |
758a629f | 704 | for (i = 0; i < combinedSeries.length; i++) { |
6ecc0739 | 705 | combinedSeries[i][1] = utils.log10(combinedSeries[i][1]); |
ccd9d7c2 PF |
706 | } |
707 | } else { | |
708 | var yExtra; | |
5061b42f | 709 | var yRange = yMax - yMin; |
ccd9d7c2 PF |
710 | if (yRange <= Number.MIN_VALUE) { |
711 | yExtra = yMax*extraPercent; | |
712 | } else { | |
713 | yExtra = yRange*extraPercent; | |
714 | } | |
715 | yMax += yExtra; | |
716 | yMin -= yExtra; | |
717 | } | |
718 | ||
719 | return {data: combinedSeries, yMin: yMin, yMax: yMax}; | |
720 | }; | |
721 | ||
722 | /** | |
723 | * @private | |
724 | * Places the zoom handles in the proper position based on the current X data window. | |
725 | */ | |
0d216a60 | 726 | rangeSelector.prototype.placeZoomHandles_ = function() { |
ccd9d7c2 PF |
727 | var xExtremes = this.dygraph_.xAxisExtremes(); |
728 | var xWindowLimits = this.dygraph_.xAxisRange(); | |
729 | var xRange = xExtremes[1] - xExtremes[0]; | |
730 | var leftPercent = Math.max(0, (xWindowLimits[0] - xExtremes[0])/xRange); | |
731 | var rightPercent = Math.max(0, (xExtremes[1] - xWindowLimits[1])/xRange); | |
732 | var leftCoord = this.canvasRect_.x + this.canvasRect_.w*leftPercent; | |
733 | var rightCoord = this.canvasRect_.x + this.canvasRect_.w*(1 - rightPercent); | |
920208fb PF |
734 | var handleTop = Math.max(this.canvasRect_.y, this.canvasRect_.y + (this.canvasRect_.h - this.leftZoomHandle_.height)/2); |
735 | var halfHandleWidth = this.leftZoomHandle_.width/2; | |
736 | this.leftZoomHandle_.style.left = (leftCoord - halfHandleWidth) + 'px'; | |
ccd9d7c2 | 737 | this.leftZoomHandle_.style.top = handleTop + 'px'; |
920208fb | 738 | this.rightZoomHandle_.style.left = (rightCoord - halfHandleWidth) + 'px'; |
ccd9d7c2 PF |
739 | this.rightZoomHandle_.style.top = this.leftZoomHandle_.style.top; |
740 | ||
741 | this.leftZoomHandle_.style.visibility = 'visible'; | |
742 | this.rightZoomHandle_.style.visibility = 'visible'; | |
743 | }; | |
744 | ||
745 | /** | |
746 | * @private | |
747 | * Draws the interactive layer in the foreground canvas. | |
748 | */ | |
0d216a60 | 749 | rangeSelector.prototype.drawInteractiveLayer_ = function() { |
ccd9d7c2 PF |
750 | var ctx = this.fgcanvas_ctx_; |
751 | ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); | |
752 | var margin = 1; | |
753 | var width = this.canvasRect_.w - margin; | |
754 | var height = this.canvasRect_.h - margin; | |
755 | var zoomHandleStatus = this.getZoomHandleStatus_(); | |
756 | ||
fb24d32c | 757 | ctx.strokeStyle = this.getOption_('rangeSelectorForegroundStrokeColor'); |
758 | ctx.lineWidth = this.getOption_('rangeSelectorForegroundLineWidth'); | |
ccd9d7c2 PF |
759 | if (!zoomHandleStatus.isZoomed) { |
760 | ctx.beginPath(); | |
761 | ctx.moveTo(margin, margin); | |
762 | ctx.lineTo(margin, height); | |
763 | ctx.lineTo(width, height); | |
764 | ctx.lineTo(width, margin); | |
765 | ctx.stroke(); | |
766 | } else { | |
5061b42f DV |
767 | var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x); |
768 | var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x); | |
ccd9d7c2 | 769 | |
b77d7a56 | 770 | ctx.fillStyle = 'rgba(240, 240, 240, ' + this.getOption_('rangeSelectorAlpha').toString() + ')'; |
920208fb PF |
771 | ctx.fillRect(0, 0, leftHandleCanvasPos, this.canvasRect_.h); |
772 | ctx.fillRect(rightHandleCanvasPos, 0, this.canvasRect_.w - rightHandleCanvasPos, this.canvasRect_.h); | |
ccd9d7c2 PF |
773 | |
774 | ctx.beginPath(); | |
775 | ctx.moveTo(margin, margin); | |
776 | ctx.lineTo(leftHandleCanvasPos, margin); | |
777 | ctx.lineTo(leftHandleCanvasPos, height); | |
778 | ctx.lineTo(rightHandleCanvasPos, height); | |
779 | ctx.lineTo(rightHandleCanvasPos, margin); | |
780 | ctx.lineTo(width, margin); | |
781 | ctx.stroke(); | |
782 | } | |
783 | }; | |
784 | ||
785 | /** | |
786 | * @private | |
787 | * Returns the current zoom handle position information. | |
788 | * @return {Object} The zoom handle status. | |
789 | */ | |
0d216a60 | 790 | rangeSelector.prototype.getZoomHandleStatus_ = function() { |
920208fb | 791 | var halfHandleWidth = this.leftZoomHandle_.width/2; |
088be40b PF |
792 | var leftHandlePos = parseFloat(this.leftZoomHandle_.style.left) + halfHandleWidth; |
793 | var rightHandlePos = parseFloat(this.rightZoomHandle_.style.left) + halfHandleWidth; | |
ccd9d7c2 PF |
794 | return { |
795 | leftHandlePos: leftHandlePos, | |
796 | rightHandlePos: rightHandlePos, | |
797 | isZoomed: (leftHandlePos - 1 > this.canvasRect_.x || rightHandlePos + 1 < this.canvasRect_.x+this.canvasRect_.w) | |
798 | }; | |
799 | }; | |
0d216a60 | 800 | |
6ecc0739 | 801 | export default rangeSelector; |