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