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() { |
3a0e53a4 | 164 | function setElementRect(canvas, context, rect) { |
6ecc0739 | 165 | var canvasScale = 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 | ||
3a0e53a4 AK |
192 | setElementRect(this.bgcanvas_, this.bgcanvas_ctx_, this.canvasRect_); |
193 | setElementRect(this.fgcanvas_, this.fgcanvas_ctx_, this.canvasRect_); | |
ccd9d7c2 PF |
194 | }; |
195 | ||
ccd9d7c2 PF |
196 | /** |
197 | * @private | |
198 | * Creates the background and foreground canvases. | |
199 | */ | |
0d216a60 | 200 | rangeSelector.prototype.createCanvases_ = function() { |
6ecc0739 | 201 | this.bgcanvas_ = utils.createCanvas(); |
88c4a47e | 202 | this.bgcanvas_.className = 'dygraph-rangesel-bgcanvas'; |
ccd9d7c2 | 203 | this.bgcanvas_.style.position = 'absolute'; |
920208fb | 204 | this.bgcanvas_.style.zIndex = 9; |
6ecc0739 | 205 | this.bgcanvas_ctx_ = utils.getContext(this.bgcanvas_); |
ccd9d7c2 | 206 | |
6ecc0739 | 207 | this.fgcanvas_ = utils.createCanvas(); |
88c4a47e | 208 | this.fgcanvas_.className = 'dygraph-rangesel-fgcanvas'; |
ccd9d7c2 | 209 | this.fgcanvas_.style.position = 'absolute'; |
920208fb | 210 | this.fgcanvas_.style.zIndex = 9; |
ccd9d7c2 | 211 | this.fgcanvas_.style.cursor = 'default'; |
6ecc0739 | 212 | this.fgcanvas_ctx_ = utils.getContext(this.fgcanvas_); |
ccd9d7c2 PF |
213 | }; |
214 | ||
215 | /** | |
216 | * @private | |
217 | * Creates the zoom handle elements. | |
218 | */ | |
0d216a60 | 219 | rangeSelector.prototype.createZoomHandles_ = function() { |
ccd9d7c2 | 220 | var img = new Image(); |
88c4a47e | 221 | img.className = 'dygraph-rangesel-zoomhandle'; |
ccd9d7c2 | 222 | img.style.position = 'absolute'; |
920208fb | 223 | img.style.zIndex = 10; |
ccd9d7c2 PF |
224 | img.style.visibility = 'hidden'; // Initially hidden so they don't show up in the wrong place. |
225 | img.style.cursor = 'col-resize'; | |
920e93f2 DV |
226 | // TODO: change image to more options |
227 | img.width = 9; | |
228 | img.height = 16; | |
229 | img.src = 'data:image/png;base64,' + | |
758a629f DV |
230 | 'iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAA' + |
231 | 'zwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENv' + | |
232 | 'bW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl' + | |
233 | '6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7s' + | |
234 | 'qSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII='; | |
ccd9d7c2 | 235 | |
0c76da8d | 236 | if (this.isMobileDevice_) { |
73c5deff PF |
237 | img.width *= 2; |
238 | img.height *= 2; | |
239 | } | |
240 | ||
ccd9d7c2 PF |
241 | this.leftZoomHandle_ = img; |
242 | this.rightZoomHandle_ = img.cloneNode(false); | |
243 | }; | |
244 | ||
245 | /** | |
246 | * @private | |
247 | * Sets up the interaction for the range selector. | |
248 | */ | |
0d216a60 | 249 | rangeSelector.prototype.initInteraction_ = function() { |
ccd9d7c2 | 250 | var self = this; |
bcf7f810 | 251 | var topElem = document; |
2871344a | 252 | var clientXLast = 0; |
ccd9d7c2 PF |
253 | var handle = null; |
254 | var isZooming = false; | |
255 | var isPanning = false; | |
9901b0c1 | 256 | var dynamic = !this.isMobileDevice_; |
ccd9d7c2 | 257 | |
2bad4d92 DV |
258 | // We cover iframes during mouse interactions. See comments in |
259 | // dygraph-utils.js for more info on why this is a good idea. | |
2cfded32 | 260 | var tarp = new IFrameTarp(); |
2bad4d92 | 261 | |
758a629f DV |
262 | // functions, defined below. Defining them this way (rather than with |
263 | // "function foo() {...}" makes JSHint happy. | |
264 | var toXDataWindow, onZoomStart, onZoom, onZoomEnd, doZoom, isMouseInPanZone, | |
2871344a | 265 | onPanStart, onPan, onPanEnd, doPan, onCanvasHover; |
758a629f | 266 | |
73c5deff PF |
267 | // Touch event functions |
268 | var onZoomHandleTouchEvent, onCanvasTouchEvent, addTouchEvents; | |
269 | ||
758a629f | 270 | toXDataWindow = function(zoomHandleStatus) { |
ccd9d7c2 PF |
271 | var xDataLimits = self.dygraph_.xAxisExtremes(); |
272 | var fact = (xDataLimits[1] - xDataLimits[0])/self.canvasRect_.w; | |
273 | var xDataMin = xDataLimits[0] + (zoomHandleStatus.leftHandlePos - self.canvasRect_.x)*fact; | |
274 | var xDataMax = xDataLimits[0] + (zoomHandleStatus.rightHandlePos - self.canvasRect_.x)*fact; | |
275 | return [xDataMin, xDataMax]; | |
276 | }; | |
277 | ||
758a629f | 278 | onZoomStart = function(e) { |
6ecc0739 | 279 | utils.cancelEvent(e); |
ccd9d7c2 | 280 | isZooming = true; |
2871344a | 281 | clientXLast = e.clientX; |
ccd9d7c2 | 282 | handle = e.target ? e.target : e.srcElement; |
6835cab8 | 283 | if (e.type === 'mousedown' || e.type === 'dragstart') { |
4f41df5a | 284 | // These events are removed manually. |
6ecc0739 DV |
285 | utils.addEvent(topElem, 'mousemove', onZoom); |
286 | utils.addEvent(topElem, 'mouseup', onZoomEnd); | |
6835cab8 | 287 | } |
ccd9d7c2 | 288 | self.fgcanvas_.style.cursor = 'col-resize'; |
2bad4d92 | 289 | tarp.cover(); |
0c76da8d | 290 | return true; |
ccd9d7c2 PF |
291 | }; |
292 | ||
758a629f | 293 | onZoom = function(e) { |
ccd9d7c2 | 294 | if (!isZooming) { |
0c76da8d | 295 | return false; |
ccd9d7c2 | 296 | } |
6ecc0739 | 297 | utils.cancelEvent(e); |
6835cab8 | 298 | |
2871344a | 299 | var delX = e.clientX - clientXLast; |
6835cab8 | 300 | if (Math.abs(delX) < 4) { |
0c76da8d | 301 | return true; |
ccd9d7c2 | 302 | } |
2871344a | 303 | clientXLast = e.clientX; |
0c76da8d PF |
304 | |
305 | // Move handle. | |
ccd9d7c2 | 306 | var zoomHandleStatus = self.getZoomHandleStatus_(); |
758a629f | 307 | var newPos; |
ccd9d7c2 | 308 | if (handle == self.leftZoomHandle_) { |
2871344a | 309 | newPos = zoomHandleStatus.leftHandlePos + delX; |
ccd9d7c2 PF |
310 | newPos = Math.min(newPos, zoomHandleStatus.rightHandlePos - handle.width - 3); |
311 | newPos = Math.max(newPos, self.canvasRect_.x); | |
312 | } else { | |
2871344a | 313 | newPos = zoomHandleStatus.rightHandlePos + delX; |
ccd9d7c2 PF |
314 | newPos = Math.min(newPos, self.canvasRect_.x + self.canvasRect_.w); |
315 | newPos = Math.max(newPos, zoomHandleStatus.leftHandlePos + handle.width + 3); | |
316 | } | |
920208fb | 317 | var halfHandleWidth = handle.width/2; |
ccd9d7c2 PF |
318 | handle.style.left = (newPos - halfHandleWidth) + 'px'; |
319 | self.drawInteractiveLayer_(); | |
320 | ||
9901b0c1 | 321 | // Zoom on the fly. |
73c5deff | 322 | if (dynamic) { |
ccd9d7c2 PF |
323 | doZoom(); |
324 | } | |
0c76da8d | 325 | return true; |
ccd9d7c2 PF |
326 | }; |
327 | ||
758a629f | 328 | onZoomEnd = function(e) { |
ccd9d7c2 | 329 | if (!isZooming) { |
0c76da8d | 330 | return false; |
ccd9d7c2 PF |
331 | } |
332 | isZooming = false; | |
2bad4d92 | 333 | tarp.uncover(); |
6ecc0739 DV |
334 | utils.removeEvent(topElem, 'mousemove', onZoom); |
335 | utils.removeEvent(topElem, 'mouseup', onZoomEnd); | |
ccd9d7c2 PF |
336 | self.fgcanvas_.style.cursor = 'default'; |
337 | ||
9901b0c1 | 338 | // If on a slower device, zoom now. |
73c5deff | 339 | if (!dynamic) { |
ccd9d7c2 PF |
340 | doZoom(); |
341 | } | |
0c76da8d | 342 | return true; |
ccd9d7c2 PF |
343 | }; |
344 | ||
758a629f | 345 | doZoom = function() { |
ccd9d7c2 PF |
346 | try { |
347 | var zoomHandleStatus = self.getZoomHandleStatus_(); | |
348 | self.isChangingRange_ = true; | |
349 | if (!zoomHandleStatus.isZoomed) { | |
e4f6e11a | 350 | self.dygraph_.resetZoom(); |
ccd9d7c2 PF |
351 | } else { |
352 | var xDataWindow = toXDataWindow(zoomHandleStatus); | |
353 | self.dygraph_.doZoomXDates_(xDataWindow[0], xDataWindow[1]); | |
354 | } | |
355 | } finally { | |
356 | self.isChangingRange_ = false; | |
357 | } | |
358 | }; | |
359 | ||
758a629f | 360 | isMouseInPanZone = function(e) { |
9901b0c1 DV |
361 | var rect = self.leftZoomHandle_.getBoundingClientRect(); |
362 | var leftHandleClientX = rect.left + rect.width/2; | |
363 | rect = self.rightZoomHandle_.getBoundingClientRect(); | |
364 | var rightHandleClientX = rect.left + rect.width/2; | |
365 | return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX); | |
ccd9d7c2 PF |
366 | }; |
367 | ||
758a629f | 368 | onPanStart = function(e) { |
ccd9d7c2 | 369 | if (!isPanning && isMouseInPanZone(e) && self.getZoomHandleStatus_().isZoomed) { |
6ecc0739 | 370 | utils.cancelEvent(e); |
ccd9d7c2 | 371 | isPanning = true; |
2871344a | 372 | clientXLast = e.clientX; |
6835cab8 | 373 | if (e.type === 'mousedown') { |
4f41df5a | 374 | // These events are removed manually. |
6ecc0739 DV |
375 | utils.addEvent(topElem, 'mousemove', onPan); |
376 | utils.addEvent(topElem, 'mouseup', onPanEnd); | |
6835cab8 | 377 | } |
0c76da8d | 378 | return true; |
ccd9d7c2 | 379 | } |
0c76da8d | 380 | return false; |
ccd9d7c2 PF |
381 | }; |
382 | ||
758a629f | 383 | onPan = function(e) { |
ccd9d7c2 | 384 | if (!isPanning) { |
0c76da8d | 385 | return false; |
ccd9d7c2 | 386 | } |
6ecc0739 | 387 | utils.cancelEvent(e); |
ccd9d7c2 | 388 | |
2871344a | 389 | var delX = e.clientX - clientXLast; |
ccd9d7c2 | 390 | if (Math.abs(delX) < 4) { |
0c76da8d | 391 | return true; |
ccd9d7c2 | 392 | } |
2871344a | 393 | clientXLast = e.clientX; |
ccd9d7c2 PF |
394 | |
395 | // Move range view | |
396 | var zoomHandleStatus = self.getZoomHandleStatus_(); | |
397 | var leftHandlePos = zoomHandleStatus.leftHandlePos; | |
398 | var rightHandlePos = zoomHandleStatus.rightHandlePos; | |
399 | var rangeSize = rightHandlePos - leftHandlePos; | |
400 | if (leftHandlePos + delX <= self.canvasRect_.x) { | |
401 | leftHandlePos = self.canvasRect_.x; | |
402 | rightHandlePos = leftHandlePos + rangeSize; | |
403 | } else if (rightHandlePos + delX >= self.canvasRect_.x + self.canvasRect_.w) { | |
404 | rightHandlePos = self.canvasRect_.x + self.canvasRect_.w; | |
405 | leftHandlePos = rightHandlePos - rangeSize; | |
406 | } else { | |
407 | leftHandlePos += delX; | |
408 | rightHandlePos += delX; | |
409 | } | |
920208fb | 410 | var halfHandleWidth = self.leftZoomHandle_.width/2; |
ccd9d7c2 PF |
411 | self.leftZoomHandle_.style.left = (leftHandlePos - halfHandleWidth) + 'px'; |
412 | self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px'; | |
413 | self.drawInteractiveLayer_(); | |
414 | ||
9901b0c1 | 415 | // Do pan on the fly. |
73c5deff | 416 | if (dynamic) { |
ccd9d7c2 PF |
417 | doPan(); |
418 | } | |
0c76da8d | 419 | return true; |
ccd9d7c2 PF |
420 | }; |
421 | ||
758a629f | 422 | onPanEnd = function(e) { |
ccd9d7c2 | 423 | if (!isPanning) { |
0c76da8d | 424 | return false; |
ccd9d7c2 PF |
425 | } |
426 | isPanning = false; | |
6ecc0739 DV |
427 | utils.removeEvent(topElem, 'mousemove', onPan); |
428 | utils.removeEvent(topElem, 'mouseup', onPanEnd); | |
9901b0c1 | 429 | // If on a slower device, do pan now. |
73c5deff | 430 | if (!dynamic) { |
ccd9d7c2 PF |
431 | doPan(); |
432 | } | |
0c76da8d | 433 | return true; |
ccd9d7c2 PF |
434 | }; |
435 | ||
758a629f | 436 | doPan = function() { |
ccd9d7c2 PF |
437 | try { |
438 | self.isChangingRange_ = true; | |
439 | self.dygraph_.dateWindow_ = toXDataWindow(self.getZoomHandleStatus_()); | |
440 | self.dygraph_.drawGraph_(false); | |
441 | } finally { | |
442 | self.isChangingRange_ = false; | |
443 | } | |
444 | }; | |
445 | ||
6835cab8 | 446 | onCanvasHover = function(e) { |
ccd9d7c2 PF |
447 | if (isZooming || isPanning) { |
448 | return; | |
449 | } | |
450 | var cursor = isMouseInPanZone(e) ? 'move' : 'default'; | |
451 | if (cursor != self.fgcanvas_.style.cursor) { | |
452 | self.fgcanvas_.style.cursor = cursor; | |
453 | } | |
454 | }; | |
455 | ||
73c5deff | 456 | onZoomHandleTouchEvent = function(e) { |
0c76da8d PF |
457 | if (e.type == 'touchstart' && e.targetTouches.length == 1) { |
458 | if (onZoomStart(e.targetTouches[0])) { | |
6ecc0739 | 459 | utils.cancelEvent(e); |
0c76da8d PF |
460 | } |
461 | } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { | |
462 | if (onZoom(e.targetTouches[0])) { | |
6ecc0739 | 463 | utils.cancelEvent(e); |
0c76da8d | 464 | } |
73c5deff PF |
465 | } else { |
466 | onZoomEnd(e); | |
467 | } | |
468 | }; | |
469 | ||
470 | onCanvasTouchEvent = function(e) { | |
0c76da8d PF |
471 | if (e.type == 'touchstart' && e.targetTouches.length == 1) { |
472 | if (onPanStart(e.targetTouches[0])) { | |
6ecc0739 | 473 | utils.cancelEvent(e); |
0c76da8d PF |
474 | } |
475 | } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { | |
476 | if (onPan(e.targetTouches[0])) { | |
6ecc0739 | 477 | utils.cancelEvent(e); |
0c76da8d | 478 | } |
73c5deff PF |
479 | } else { |
480 | onPanEnd(e); | |
481 | } | |
482 | }; | |
483 | ||
484 | addTouchEvents = function(elem, fn) { | |
6a4587ac RK |
485 | var types = ['touchstart', 'touchend', 'touchmove', 'touchcancel']; |
486 | for (var i = 0; i < types.length; i++) { | |
aeca29ac | 487 | self.dygraph_.addAndTrackEvent(elem, types[i], fn); |
6a4587ac | 488 | } |
73c5deff PF |
489 | }; |
490 | ||
6ecc0739 | 491 | this.setDefaultOption_('interactionModel', DygraphInteraction.dragIsPanInteractionModel); |
ec475f44 | 492 | this.setDefaultOption_('panEdgeFraction', 0.0001); |
ccd9d7c2 | 493 | |
920208fb | 494 | var dragStartEvent = window.opera ? 'mousedown' : 'dragstart'; |
aeca29ac RK |
495 | this.dygraph_.addAndTrackEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart); |
496 | this.dygraph_.addAndTrackEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart); | |
920208fb | 497 | |
9901b0c1 DV |
498 | this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousedown', onPanStart); |
499 | this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousemove', onCanvasHover); | |
73c5deff PF |
500 | |
501 | // Touch events | |
502 | if (this.hasTouchInterface_) { | |
503 | addTouchEvents(this.leftZoomHandle_, onZoomHandleTouchEvent); | |
504 | addTouchEvents(this.rightZoomHandle_, onZoomHandleTouchEvent); | |
505 | addTouchEvents(this.fgcanvas_, onCanvasTouchEvent); | |
506 | } | |
ccd9d7c2 PF |
507 | }; |
508 | ||
509 | /** | |
510 | * @private | |
511 | * Draws the static layer in the background canvas. | |
512 | */ | |
0d216a60 | 513 | rangeSelector.prototype.drawStaticLayer_ = function() { |
ccd9d7c2 PF |
514 | var ctx = this.bgcanvas_ctx_; |
515 | ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); | |
db6a9f5a | 516 | try { |
ccd9d7c2 | 517 | this.drawMiniPlot_(); |
db6a9f5a | 518 | } catch(ex) { |
8a68db7d | 519 | console.warn(ex); |
db6a9f5a | 520 | } |
920208fb | 521 | |
758a629f | 522 | var margin = 0.5; |
fb24d32c | 523 | this.bgcanvas_ctx_.lineWidth = this.getOption_('rangeSelectorBackgroundLineWidth'); |
524 | ctx.strokeStyle = this.getOption_('rangeSelectorBackgroundStrokeColor'); | |
920208fb PF |
525 | ctx.beginPath(); |
526 | ctx.moveTo(margin, margin); | |
527 | ctx.lineTo(margin, this.canvasRect_.h-margin); | |
528 | ctx.lineTo(this.canvasRect_.w-margin, this.canvasRect_.h-margin); | |
529 | ctx.lineTo(this.canvasRect_.w-margin, margin); | |
530 | ctx.stroke(); | |
ccd9d7c2 PF |
531 | }; |
532 | ||
533 | ||
534 | /** | |
535 | * @private | |
536 | * Draws the mini plot in the background canvas. | |
537 | */ | |
0d216a60 | 538 | rangeSelector.prototype.drawMiniPlot_ = function() { |
ec475f44 | 539 | var fillStyle = this.getOption_('rangeSelectorPlotFillColor'); |
79cb28dd | 540 | var fillGradientStyle = this.getOption_('rangeSelectorPlotFillGradientColor'); |
ec475f44 | 541 | var strokeStyle = this.getOption_('rangeSelectorPlotStrokeColor'); |
ccd9d7c2 PF |
542 | if (!fillStyle && !strokeStyle) { |
543 | return; | |
544 | } | |
545 | ||
ec475f44 | 546 | var stepPlot = this.getOption_('stepPlot'); |
e03d443c | 547 | |
ccd9d7c2 PF |
548 | var combinedSeriesData = this.computeCombinedSeriesAndLimits_(); |
549 | var yRange = combinedSeriesData.yMax - combinedSeriesData.yMin; | |
550 | ||
551 | // Draw the mini plot. | |
552 | var ctx = this.bgcanvas_ctx_; | |
758a629f | 553 | var margin = 0.5; |
ccd9d7c2 PF |
554 | |
555 | var xExtremes = this.dygraph_.xAxisExtremes(); | |
556 | var xRange = Math.max(xExtremes[1] - xExtremes[0], 1.e-30); | |
557 | var xFact = (this.canvasRect_.w - margin)/xRange; | |
558 | var yFact = (this.canvasRect_.h - margin)/yRange; | |
559 | var canvasWidth = this.canvasRect_.w - margin; | |
560 | var canvasHeight = this.canvasRect_.h - margin; | |
561 | ||
e03d443c WB |
562 | var prevX = null, prevY = null; |
563 | ||
ccd9d7c2 PF |
564 | ctx.beginPath(); |
565 | ctx.moveTo(margin, canvasHeight); | |
566 | for (var i = 0; i < combinedSeriesData.data.length; i++) { | |
567 | var dataPoint = combinedSeriesData.data[i]; | |
e03d443c WB |
568 | var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN); |
569 | var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN); | |
5575fa36 DV |
570 | |
571 | // Skip points that don't change the x-value. Overly fine-grained points | |
572 | // can cause major slowdowns with the ctx.fill() call below. | |
69c9b9f2 | 573 | if (!stepPlot && prevX !== null && Math.round(x) == Math.round(prevX)) { |
5575fa36 DV |
574 | continue; |
575 | } | |
576 | ||
ccd9d7c2 | 577 | if (isFinite(x) && isFinite(y)) { |
e03d443c | 578 | if(prevX === null) { |
87196f1b WB |
579 | ctx.lineTo(x, canvasHeight); |
580 | } | |
581 | else if (stepPlot) { | |
582 | ctx.lineTo(x, prevY); | |
583 | } | |
ccd9d7c2 | 584 | ctx.lineTo(x, y); |
e03d443c | 585 | prevX = x; |
87196f1b | 586 | prevY = y; |
ccd9d7c2 | 587 | } |
e03d443c | 588 | else { |
87196f1b WB |
589 | if(prevX !== null) { |
590 | if (stepPlot) { | |
591 | ctx.lineTo(x, prevY); | |
592 | ctx.lineTo(x, canvasHeight); | |
593 | } | |
594 | else { | |
595 | ctx.lineTo(prevX, canvasHeight); | |
596 | } | |
597 | } | |
598 | prevX = prevY = null; | |
599 | } | |
ccd9d7c2 PF |
600 | } |
601 | ctx.lineTo(canvasWidth, canvasHeight); | |
602 | ctx.closePath(); | |
603 | ||
604 | if (fillStyle) { | |
605 | var lingrad = this.bgcanvas_ctx_.createLinearGradient(0, 0, 0, canvasHeight); | |
79cb28dd | 606 | if (fillGradientStyle) { |
607 | lingrad.addColorStop(0, fillGradientStyle); | |
608 | } | |
ccd9d7c2 PF |
609 | lingrad.addColorStop(1, fillStyle); |
610 | this.bgcanvas_ctx_.fillStyle = lingrad; | |
611 | ctx.fill(); | |
612 | } | |
613 | ||
614 | if (strokeStyle) { | |
615 | this.bgcanvas_ctx_.strokeStyle = strokeStyle; | |
b77d7a56 | 616 | this.bgcanvas_ctx_.lineWidth = this.getOption_('rangeSelectorPlotLineWidth'); |
ccd9d7c2 PF |
617 | ctx.stroke(); |
618 | } | |
619 | }; | |
620 | ||
621 | /** | |
622 | * @private | |
dcebad80 DV |
623 | * Computes and returns the combined series data along with min/max for the mini plot. |
624 | * The combined series consists of averaged values for all series. | |
625 | * When series have error bars, the error bars are ignored. | |
626 | * @return {Object} An object containing combined series array, ymin, ymax. | |
ccd9d7c2 | 627 | */ |
0d216a60 | 628 | rangeSelector.prototype.computeCombinedSeriesAndLimits_ = function() { |
dcebad80 | 629 | var g = this.dygraph_; |
ec475f44 | 630 | var logscale = this.getOption_('logscale'); |
bcf7f810 | 631 | var i; |
ccd9d7c2 | 632 | |
0a0885d1 DV |
633 | // Select series to combine. By default, all series are combined. |
634 | var numColumns = g.numColumns(); | |
635 | var labels = g.getLabels(); | |
636 | var includeSeries = new Array(numColumns); | |
637 | var anySet = false; | |
6ed703fd DV |
638 | var visibility = g.visibility(); |
639 | var inclusion = []; | |
640 | ||
0a0885d1 DV |
641 | for (i = 1; i < numColumns; i++) { |
642 | var include = this.getOption_('showInRangeSelector', labels[i]); | |
6ed703fd | 643 | inclusion.push(include); |
0a0885d1 DV |
644 | if (include !== null) anySet = true; // it's set explicitly for this series |
645 | } | |
6ed703fd DV |
646 | |
647 | if (anySet) { | |
648 | for (i = 1; i < numColumns; i++) { | |
649 | includeSeries[i] = inclusion[i - 1]; | |
650 | } | |
651 | } else { | |
652 | for (i = 1; i < numColumns; i++) { | |
653 | includeSeries[i] = visibility[i - 1]; | |
654 | } | |
1085dbce PP |
655 | } |
656 | ||
0a0885d1 | 657 | // Create a combined series (average of selected series values). |
dcebad80 DV |
658 | // TODO(danvk): short-circuit if there's only one series. |
659 | var rolledSeries = []; | |
660 | var dataHandler = g.dataHandler_; | |
661 | var options = g.attributes_; | |
0a0885d1 DV |
662 | for (i = 1; i < g.numColumns(); i++) { |
663 | if (!includeSeries[i]) continue; | |
664 | var series = dataHandler.extractSeries(g.rawData_, i, options); | |
dcebad80 DV |
665 | if (g.rollPeriod() > 1) { |
666 | series = dataHandler.rollingAverage(series, g.rollPeriod(), options); | |
ccd9d7c2 | 667 | } |
b77d7a56 | 668 | |
dcebad80 | 669 | rolledSeries.push(series); |
ccd9d7c2 PF |
670 | } |
671 | ||
dcebad80 DV |
672 | var combinedSeries = []; |
673 | for (i = 0; i < rolledSeries[0].length; i++) { | |
674 | var sum = 0; | |
675 | var count = 0; | |
bcf7f810 | 676 | for (var j = 0; j < rolledSeries.length; j++) { |
dcebad80 DV |
677 | var y = rolledSeries[j][i][1]; |
678 | if (y === null || isNaN(y)) continue; | |
679 | count++; | |
680 | sum += y; | |
ccd9d7c2 | 681 | } |
dcebad80 | 682 | combinedSeries.push([rolledSeries[0][i][0], sum / count]); |
ccd9d7c2 PF |
683 | } |
684 | ||
685 | // Compute the y range. | |
686 | var yMin = Number.MAX_VALUE; | |
687 | var yMax = -Number.MAX_VALUE; | |
758a629f | 688 | for (i = 0; i < combinedSeries.length; i++) { |
c0430a23 | 689 | var yVal = combinedSeries[i][1]; |
758a629f | 690 | if (yVal !== null && isFinite(yVal) && (!logscale || yVal > 0)) { |
ccd9d7c2 PF |
691 | yMin = Math.min(yMin, yVal); |
692 | yMax = Math.max(yMax, yVal); | |
693 | } | |
694 | } | |
695 | ||
696 | // Convert Y data to log scale if needed. | |
697 | // Also, expand the Y range to compress the mini plot a little. | |
758a629f | 698 | var extraPercent = 0.25; |
ccd9d7c2 | 699 | if (logscale) { |
6ecc0739 | 700 | yMax = utils.log10(yMax); |
ccd9d7c2 | 701 | yMax += yMax*extraPercent; |
6ecc0739 | 702 | yMin = utils.log10(yMin); |
758a629f | 703 | for (i = 0; i < combinedSeries.length; i++) { |
6ecc0739 | 704 | combinedSeries[i][1] = utils.log10(combinedSeries[i][1]); |
ccd9d7c2 PF |
705 | } |
706 | } else { | |
707 | var yExtra; | |
5061b42f | 708 | var yRange = yMax - yMin; |
ccd9d7c2 PF |
709 | if (yRange <= Number.MIN_VALUE) { |
710 | yExtra = yMax*extraPercent; | |
711 | } else { | |
712 | yExtra = yRange*extraPercent; | |
713 | } | |
714 | yMax += yExtra; | |
715 | yMin -= yExtra; | |
716 | } | |
717 | ||
718 | return {data: combinedSeries, yMin: yMin, yMax: yMax}; | |
719 | }; | |
720 | ||
721 | /** | |
722 | * @private | |
723 | * Places the zoom handles in the proper position based on the current X data window. | |
724 | */ | |
0d216a60 | 725 | rangeSelector.prototype.placeZoomHandles_ = function() { |
ccd9d7c2 PF |
726 | var xExtremes = this.dygraph_.xAxisExtremes(); |
727 | var xWindowLimits = this.dygraph_.xAxisRange(); | |
728 | var xRange = xExtremes[1] - xExtremes[0]; | |
729 | var leftPercent = Math.max(0, (xWindowLimits[0] - xExtremes[0])/xRange); | |
730 | var rightPercent = Math.max(0, (xExtremes[1] - xWindowLimits[1])/xRange); | |
731 | var leftCoord = this.canvasRect_.x + this.canvasRect_.w*leftPercent; | |
732 | var rightCoord = this.canvasRect_.x + this.canvasRect_.w*(1 - rightPercent); | |
920208fb PF |
733 | var handleTop = Math.max(this.canvasRect_.y, this.canvasRect_.y + (this.canvasRect_.h - this.leftZoomHandle_.height)/2); |
734 | var halfHandleWidth = this.leftZoomHandle_.width/2; | |
735 | this.leftZoomHandle_.style.left = (leftCoord - halfHandleWidth) + 'px'; | |
ccd9d7c2 | 736 | this.leftZoomHandle_.style.top = handleTop + 'px'; |
920208fb | 737 | this.rightZoomHandle_.style.left = (rightCoord - halfHandleWidth) + 'px'; |
ccd9d7c2 PF |
738 | this.rightZoomHandle_.style.top = this.leftZoomHandle_.style.top; |
739 | ||
740 | this.leftZoomHandle_.style.visibility = 'visible'; | |
741 | this.rightZoomHandle_.style.visibility = 'visible'; | |
742 | }; | |
743 | ||
744 | /** | |
745 | * @private | |
746 | * Draws the interactive layer in the foreground canvas. | |
747 | */ | |
0d216a60 | 748 | rangeSelector.prototype.drawInteractiveLayer_ = function() { |
ccd9d7c2 PF |
749 | var ctx = this.fgcanvas_ctx_; |
750 | ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); | |
751 | var margin = 1; | |
752 | var width = this.canvasRect_.w - margin; | |
753 | var height = this.canvasRect_.h - margin; | |
754 | var zoomHandleStatus = this.getZoomHandleStatus_(); | |
755 | ||
fb24d32c | 756 | ctx.strokeStyle = this.getOption_('rangeSelectorForegroundStrokeColor'); |
757 | ctx.lineWidth = this.getOption_('rangeSelectorForegroundLineWidth'); | |
ccd9d7c2 PF |
758 | if (!zoomHandleStatus.isZoomed) { |
759 | ctx.beginPath(); | |
760 | ctx.moveTo(margin, margin); | |
761 | ctx.lineTo(margin, height); | |
762 | ctx.lineTo(width, height); | |
763 | ctx.lineTo(width, margin); | |
764 | ctx.stroke(); | |
765 | } else { | |
5061b42f DV |
766 | var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x); |
767 | var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x); | |
ccd9d7c2 | 768 | |
b77d7a56 | 769 | ctx.fillStyle = 'rgba(240, 240, 240, ' + this.getOption_('rangeSelectorAlpha').toString() + ')'; |
920208fb PF |
770 | ctx.fillRect(0, 0, leftHandleCanvasPos, this.canvasRect_.h); |
771 | ctx.fillRect(rightHandleCanvasPos, 0, this.canvasRect_.w - rightHandleCanvasPos, this.canvasRect_.h); | |
ccd9d7c2 PF |
772 | |
773 | ctx.beginPath(); | |
774 | ctx.moveTo(margin, margin); | |
775 | ctx.lineTo(leftHandleCanvasPos, margin); | |
776 | ctx.lineTo(leftHandleCanvasPos, height); | |
777 | ctx.lineTo(rightHandleCanvasPos, height); | |
778 | ctx.lineTo(rightHandleCanvasPos, margin); | |
779 | ctx.lineTo(width, margin); | |
780 | ctx.stroke(); | |
781 | } | |
782 | }; | |
783 | ||
784 | /** | |
785 | * @private | |
786 | * Returns the current zoom handle position information. | |
787 | * @return {Object} The zoom handle status. | |
788 | */ | |
0d216a60 | 789 | rangeSelector.prototype.getZoomHandleStatus_ = function() { |
920208fb | 790 | var halfHandleWidth = this.leftZoomHandle_.width/2; |
088be40b PF |
791 | var leftHandlePos = parseFloat(this.leftZoomHandle_.style.left) + halfHandleWidth; |
792 | var rightHandlePos = parseFloat(this.rightZoomHandle_.style.left) + halfHandleWidth; | |
ccd9d7c2 PF |
793 | return { |
794 | leftHandlePos: leftHandlePos, | |
795 | rightHandlePos: rightHandlePos, | |
796 | isZoomed: (leftHandlePos - 1 > this.canvasRect_.x || rightHandlePos + 1 < this.canvasRect_.x+this.canvasRect_.w) | |
797 | }; | |
798 | }; | |
0d216a60 | 799 | |
6ecc0739 | 800 | export default rangeSelector; |