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 | */ | |
ccd9d7c2 PF |
6 | |
7 | /** | |
0d216a60 | 8 | * @fileoverview This file contains the RangeSelector plugin used to provide |
ccd9d7c2 PF |
9 | * a timeline range selector widget for dygraphs. |
10 | */ | |
11 | ||
0d216a60 PF |
12 | Dygraph.Plugins.RangeSelector = (function() { |
13 | ||
758a629f DV |
14 | /*jshint globalstrict: true */ |
15 | /*global Dygraph:false */ | |
c0f54d4f DV |
16 | "use strict"; |
17 | ||
ec475f44 PF |
18 | // Range selector status values |
19 | var NOT_CREATED = 0; // Range selector interface has not been created | |
20 | var CREATED = 1 << 0; // Range selector interface has been created | |
21 | var ADDED_TO_GRAPH = 1 << 1; // Range selector elements have been added to the graph | |
0d216a60 PF |
22 | |
23 | var rangeSelector = function() { | |
ccd9d7c2 | 24 | this.isIE_ = /MSIE/.test(navigator.userAgent) && !window.opera; |
73c5deff | 25 | this.hasTouchInterface_ = typeof(TouchEvent) != 'undefined'; |
0c76da8d | 26 | this.isMobileDevice_ = /mobile|android/gi.test(navigator.appVersion); |
0d216a60 PF |
27 | this.status_ = NOT_CREATED; |
28 | }; | |
29 | ||
30 | rangeSelector.prototype.toString = function() { | |
31 | return "RangeSelector Plugin"; | |
32 | }; | |
33 | ||
34 | rangeSelector.prototype.activate = function(dygraph) { | |
35 | this.dygraph_ = dygraph; | |
ec475f44 PF |
36 | this.layout_ = dygraph.layout_; |
37 | this.graphDiv_ = dygraph.graphDiv; | |
0d216a60 | 38 | this.isUsingExcanvas_ = dygraph.isUsingExcanvas_; |
ec475f44 | 39 | if (this.getOption_('showRangeSelector')) { |
0d216a60 PF |
40 | this.createInterface_(); |
41 | } | |
42 | return { | |
43 | layout: this.reserveSpace_, | |
44 | predraw: this.renderStaticLayer_, | |
45 | didDrawChart: this.renderInteractiveLayer_ | |
46 | }; | |
47 | }; | |
48 | ||
49 | rangeSelector.prototype.destroy = function() { | |
50 | this.bgcanvas_ = null; | |
51 | this.fgcanvas_ = null; | |
52 | this.leftZoomHandle_ = null; | |
53 | this.rightZoomHandle_ = null; | |
54 | this.iePanOverlay_ = null; | |
55 | }; | |
56 | ||
57 | //------------------------------------------------------------------ | |
58 | // Private methods | |
59 | //------------------------------------------------------------------ | |
60 | ||
ec475f44 PF |
61 | rangeSelector.prototype.getOption_ = function(name) { |
62 | return this.dygraph_.getOption(name); | |
63 | }; | |
64 | ||
65 | rangeSelector.prototype.setDefaultOption_ = function(name, value) { | |
66 | return this.dygraph_.attrs_[name] = value; | |
0d216a60 PF |
67 | }; |
68 | ||
69 | /** | |
70 | * @private | |
71 | * Creates the range selector elements and adds them to the graph. | |
72 | */ | |
73 | rangeSelector.prototype.createInterface_ = function() { | |
ccd9d7c2 | 74 | this.createCanvases_(); |
920208fb PF |
75 | if (this.isUsingExcanvas_) { |
76 | this.createIEPanOverlay_(); | |
77 | } | |
ccd9d7c2 PF |
78 | this.createZoomHandles_(); |
79 | this.initInteraction_(); | |
0d216a60 PF |
80 | |
81 | // Range selector and animatedZooms have a bad interaction. See issue 359. | |
ec475f44 PF |
82 | if (this.getOption_('animatedZooms')) { |
83 | this.dygraph_.warn('Animated zooms and range selector are not compatible; disabling animatedZooms.'); | |
84 | this.dygraph_.updateOptions({animatedZooms: false}, true); | |
0d216a60 PF |
85 | } |
86 | ||
87 | this.addToGraph_(); | |
88 | this.status_ = CREATED; | |
ccd9d7c2 PF |
89 | }; |
90 | ||
91 | /** | |
0d216a60 PF |
92 | * @private |
93 | * Adds the range selector to the graph. | |
ccd9d7c2 | 94 | */ |
0d216a60 | 95 | rangeSelector.prototype.addToGraph_ = function() { |
ec475f44 | 96 | var graphDiv = this.graphDiv_; |
ccd9d7c2 PF |
97 | graphDiv.appendChild(this.bgcanvas_); |
98 | graphDiv.appendChild(this.fgcanvas_); | |
99 | graphDiv.appendChild(this.leftZoomHandle_); | |
100 | graphDiv.appendChild(this.rightZoomHandle_); | |
0d216a60 PF |
101 | this.status_ |= ADDED_TO_GRAPH; |
102 | }; | |
103 | ||
104 | /** | |
105 | * @private | |
106 | * Removes the range selector from the graph. | |
107 | */ | |
108 | rangeSelector.prototype.removeFromGraph_ = function() { | |
ec475f44 | 109 | var graphDiv = this.graphDiv_; |
0d216a60 PF |
110 | graphDiv.removeChild(this.bgcanvas_); |
111 | graphDiv.removeChild(this.fgcanvas_); | |
112 | graphDiv.removeChild(this.leftZoomHandle_); | |
113 | graphDiv.removeChild(this.rightZoomHandle_); | |
114 | this.status_ ^= ADDED_TO_GRAPH; | |
115 | }; | |
116 | ||
117 | /** | |
118 | * @private | |
119 | * Called by Layout to allow range selector to reserve its space. | |
120 | */ | |
121 | rangeSelector.prototype.reserveSpace_ = function(e) { | |
ec475f44 PF |
122 | if (this.getOption_('showRangeSelector')) { |
123 | e.reserveSpaceBottom(this.getOption_('rangeSelectorHeight') + 4); | |
0d216a60 | 124 | } |
ccd9d7c2 PF |
125 | }; |
126 | ||
127 | /** | |
0d216a60 PF |
128 | * @private |
129 | * Renders the static portion of the range selector at the predraw stage. | |
ccd9d7c2 | 130 | */ |
0d216a60 | 131 | rangeSelector.prototype.renderStaticLayer_ = function() { |
ec475f44 | 132 | if (!this.updateInterfaceStatus_()) { |
0d216a60 PF |
133 | return; |
134 | } | |
ccd9d7c2 PF |
135 | this.resize_(); |
136 | this.drawStaticLayer_(); | |
137 | }; | |
138 | ||
139 | /** | |
0d216a60 PF |
140 | * @private |
141 | * Renders the interactive portion of the range selector after the chart has been drawn. | |
ccd9d7c2 | 142 | */ |
0d216a60 | 143 | rangeSelector.prototype.renderInteractiveLayer_ = function() { |
ec475f44 | 144 | if (!this.updateInterfaceStatus_() || this.isChangingRange_) { |
ccd9d7c2 PF |
145 | return; |
146 | } | |
ccd9d7c2 PF |
147 | this.placeZoomHandles_(); |
148 | this.drawInteractiveLayer_(); | |
149 | }; | |
150 | ||
151 | /** | |
152 | * @private | |
ec475f44 | 153 | * Check to see if the range selector is enabled/disabled and update interface accordingly. |
0d216a60 | 154 | */ |
ec475f44 PF |
155 | rangeSelector.prototype.updateInterfaceStatus_ = function() { |
156 | var enabled = this.getOption_('showRangeSelector'); | |
0d216a60 PF |
157 | if (enabled) { |
158 | if (!(this.status_ & CREATED)) { | |
159 | this.createInterface_(); | |
160 | } else if (!(this.status_ & ADDED_TO_GRAPH)) { | |
161 | this.addToGraph_(); | |
162 | } | |
163 | } else if (this.status_ & ADDED_TO_GRAPH) { | |
164 | this.removeFromGraph_(); | |
165 | var dygraph = this.dygraph_; | |
166 | setTimeout(function() { dygraph.width_ = 0; dygraph.resize(); }, 1); | |
167 | } | |
168 | return enabled; | |
169 | } | |
170 | ||
171 | /** | |
172 | * @private | |
ccd9d7c2 PF |
173 | * Resizes the range selector. |
174 | */ | |
0d216a60 | 175 | rangeSelector.prototype.resize_ = function() { |
920208fb | 176 | function setElementRect(canvas, rect) { |
ccd9d7c2 PF |
177 | canvas.style.top = rect.y + 'px'; |
178 | canvas.style.left = rect.x + 'px'; | |
179 | canvas.width = rect.w; | |
180 | canvas.height = rect.h; | |
181 | canvas.style.width = canvas.width + 'px'; // for IE | |
182 | canvas.style.height = canvas.height + 'px'; // for IE | |
758a629f | 183 | } |
ccd9d7c2 | 184 | |
70be5ed1 | 185 | var plotArea = this.layout_.getPlotArea(); |
ec475f44 | 186 | var xAxisLabelHeight = this.getOption_('xAxisHeight') || (this.getOption_('axisLabelFontSize') + 2 * this.getOption_('axisTickSize')); |
ccd9d7c2 PF |
187 | this.canvasRect_ = { |
188 | x: plotArea.x, | |
189 | y: plotArea.y + plotArea.h + xAxisLabelHeight + 4, | |
190 | w: plotArea.w, | |
ec475f44 | 191 | h: this.getOption_('rangeSelectorHeight') |
ccd9d7c2 PF |
192 | }; |
193 | ||
920208fb PF |
194 | setElementRect(this.bgcanvas_, this.canvasRect_); |
195 | setElementRect(this.fgcanvas_, this.canvasRect_); | |
ccd9d7c2 PF |
196 | }; |
197 | ||
ccd9d7c2 PF |
198 | /** |
199 | * @private | |
200 | * Creates the background and foreground canvases. | |
201 | */ | |
0d216a60 | 202 | rangeSelector.prototype.createCanvases_ = function() { |
ccd9d7c2 | 203 | this.bgcanvas_ = Dygraph.createCanvas(); |
88c4a47e | 204 | this.bgcanvas_.className = 'dygraph-rangesel-bgcanvas'; |
ccd9d7c2 | 205 | this.bgcanvas_.style.position = 'absolute'; |
920208fb | 206 | this.bgcanvas_.style.zIndex = 9; |
ccd9d7c2 PF |
207 | this.bgcanvas_ctx_ = Dygraph.getContext(this.bgcanvas_); |
208 | ||
209 | this.fgcanvas_ = Dygraph.createCanvas(); | |
88c4a47e | 210 | this.fgcanvas_.className = 'dygraph-rangesel-fgcanvas'; |
ccd9d7c2 | 211 | this.fgcanvas_.style.position = 'absolute'; |
920208fb | 212 | this.fgcanvas_.style.zIndex = 9; |
ccd9d7c2 PF |
213 | this.fgcanvas_.style.cursor = 'default'; |
214 | this.fgcanvas_ctx_ = Dygraph.getContext(this.fgcanvas_); | |
215 | }; | |
216 | ||
217 | /** | |
218 | * @private | |
920208fb PF |
219 | * Creates overlay divs for IE/Excanvas so that mouse events are handled properly. |
220 | */ | |
0d216a60 | 221 | rangeSelector.prototype.createIEPanOverlay_ = function() { |
920208fb PF |
222 | this.iePanOverlay_ = document.createElement("div"); |
223 | this.iePanOverlay_.style.position = 'absolute'; | |
224 | this.iePanOverlay_.style.backgroundColor = 'white'; | |
225 | this.iePanOverlay_.style.filter = 'alpha(opacity=0)'; | |
226 | this.iePanOverlay_.style.display = 'none'; | |
227 | this.iePanOverlay_.style.cursor = 'move'; | |
228 | this.fgcanvas_.appendChild(this.iePanOverlay_); | |
229 | }; | |
230 | ||
231 | /** | |
232 | * @private | |
ccd9d7c2 PF |
233 | * Creates the zoom handle elements. |
234 | */ | |
0d216a60 | 235 | rangeSelector.prototype.createZoomHandles_ = function() { |
ccd9d7c2 | 236 | var img = new Image(); |
88c4a47e | 237 | img.className = 'dygraph-rangesel-zoomhandle'; |
ccd9d7c2 | 238 | img.style.position = 'absolute'; |
920208fb | 239 | img.style.zIndex = 10; |
ccd9d7c2 PF |
240 | img.style.visibility = 'hidden'; // Initially hidden so they don't show up in the wrong place. |
241 | img.style.cursor = 'col-resize'; | |
73c5deff | 242 | |
920208fb | 243 | if (/MSIE 7/.test(navigator.userAgent)) { // IE7 doesn't support embedded src data. |
73c5deff PF |
244 | img.width = 7; |
245 | img.height = 14; | |
246 | img.style.backgroundColor = 'white'; | |
247 | img.style.border = '1px solid #333333'; // Just show box in IE7. | |
920208fb | 248 | } else { |
73c5deff PF |
249 | img.width = 9; |
250 | img.height = 16; | |
251 | img.src = 'data:image/png;base64,' + | |
758a629f DV |
252 | 'iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAA' + |
253 | 'zwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENv' + | |
254 | 'bW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl' + | |
255 | '6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7s' + | |
256 | 'qSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII='; | |
920208fb | 257 | } |
ccd9d7c2 | 258 | |
0c76da8d | 259 | if (this.isMobileDevice_) { |
73c5deff PF |
260 | img.width *= 2; |
261 | img.height *= 2; | |
262 | } | |
263 | ||
ccd9d7c2 PF |
264 | this.leftZoomHandle_ = img; |
265 | this.rightZoomHandle_ = img.cloneNode(false); | |
266 | }; | |
267 | ||
268 | /** | |
269 | * @private | |
270 | * Sets up the interaction for the range selector. | |
271 | */ | |
0d216a60 | 272 | rangeSelector.prototype.initInteraction_ = function() { |
ccd9d7c2 PF |
273 | var self = this; |
274 | var topElem = this.isIE_ ? document : window; | |
275 | var xLast = 0; | |
276 | var handle = null; | |
277 | var isZooming = false; | |
278 | var isPanning = false; | |
73c5deff | 279 | var dynamic = !this.isMobileDevice_ && !this.isUsingExcanvas_; |
ccd9d7c2 | 280 | |
2bad4d92 DV |
281 | // We cover iframes during mouse interactions. See comments in |
282 | // dygraph-utils.js for more info on why this is a good idea. | |
283 | var tarp = new Dygraph.IFrameTarp(); | |
284 | ||
758a629f DV |
285 | // functions, defined below. Defining them this way (rather than with |
286 | // "function foo() {...}" makes JSHint happy. | |
287 | var toXDataWindow, onZoomStart, onZoom, onZoomEnd, doZoom, isMouseInPanZone, | |
0c76da8d | 288 | onPanStart, onPan, onPanEnd, doPan, onCanvasMouseMove, applyBrowserZoomLevel; |
758a629f | 289 | |
73c5deff PF |
290 | // Touch event functions |
291 | var onZoomHandleTouchEvent, onCanvasTouchEvent, addTouchEvents; | |
292 | ||
758a629f | 293 | toXDataWindow = function(zoomHandleStatus) { |
ccd9d7c2 PF |
294 | var xDataLimits = self.dygraph_.xAxisExtremes(); |
295 | var fact = (xDataLimits[1] - xDataLimits[0])/self.canvasRect_.w; | |
296 | var xDataMin = xDataLimits[0] + (zoomHandleStatus.leftHandlePos - self.canvasRect_.x)*fact; | |
297 | var xDataMax = xDataLimits[0] + (zoomHandleStatus.rightHandlePos - self.canvasRect_.x)*fact; | |
298 | return [xDataMin, xDataMax]; | |
299 | }; | |
300 | ||
0c76da8d PF |
301 | applyBrowserZoomLevel = function(delX) { |
302 | var zoom = window.outerWidth/document.documentElement.clientWidth; | |
303 | if (!isNaN(zoom)) { | |
304 | return delX/zoom; | |
305 | } else { | |
306 | return delX; | |
307 | } | |
308 | }; | |
309 | ||
758a629f | 310 | onZoomStart = function(e) { |
ccd9d7c2 PF |
311 | Dygraph.cancelEvent(e); |
312 | isZooming = true; | |
313 | xLast = e.screenX; | |
314 | handle = e.target ? e.target : e.srcElement; | |
6a4587ac RK |
315 | self.dygraph_.addEvent(topElem, 'mousemove', onZoom); |
316 | self.dygraph_.addEvent(topElem, 'mouseup', onZoomEnd); | |
ccd9d7c2 | 317 | self.fgcanvas_.style.cursor = 'col-resize'; |
2bad4d92 | 318 | tarp.cover(); |
0c76da8d | 319 | return true; |
ccd9d7c2 PF |
320 | }; |
321 | ||
758a629f | 322 | onZoom = function(e) { |
ccd9d7c2 | 323 | if (!isZooming) { |
0c76da8d | 324 | return false; |
ccd9d7c2 | 325 | } |
0c76da8d | 326 | Dygraph.cancelEvent(e); |
ccd9d7c2 | 327 | var delX = e.screenX - xLast; |
42a9ebb8 DV |
328 | if (Math.abs(delX) < 4 || e.screenX === 0) { |
329 | // First iPad move event seems to have screenX = 0 | |
0c76da8d | 330 | return true; |
ccd9d7c2 PF |
331 | } |
332 | xLast = e.screenX; | |
0c76da8d PF |
333 | delX = applyBrowserZoomLevel(delX); |
334 | ||
335 | // Move handle. | |
ccd9d7c2 | 336 | var zoomHandleStatus = self.getZoomHandleStatus_(); |
758a629f | 337 | var newPos; |
ccd9d7c2 | 338 | if (handle == self.leftZoomHandle_) { |
758a629f | 339 | newPos = zoomHandleStatus.leftHandlePos + delX; |
ccd9d7c2 PF |
340 | newPos = Math.min(newPos, zoomHandleStatus.rightHandlePos - handle.width - 3); |
341 | newPos = Math.max(newPos, self.canvasRect_.x); | |
342 | } else { | |
758a629f | 343 | newPos = zoomHandleStatus.rightHandlePos + delX; |
ccd9d7c2 PF |
344 | newPos = Math.min(newPos, self.canvasRect_.x + self.canvasRect_.w); |
345 | newPos = Math.max(newPos, zoomHandleStatus.leftHandlePos + handle.width + 3); | |
346 | } | |
920208fb | 347 | var halfHandleWidth = handle.width/2; |
ccd9d7c2 PF |
348 | handle.style.left = (newPos - halfHandleWidth) + 'px'; |
349 | self.drawInteractiveLayer_(); | |
350 | ||
351 | // Zoom on the fly (if not using excanvas). | |
73c5deff | 352 | if (dynamic) { |
ccd9d7c2 PF |
353 | doZoom(); |
354 | } | |
0c76da8d | 355 | return true; |
ccd9d7c2 PF |
356 | }; |
357 | ||
758a629f | 358 | onZoomEnd = function(e) { |
ccd9d7c2 | 359 | if (!isZooming) { |
0c76da8d | 360 | return false; |
ccd9d7c2 PF |
361 | } |
362 | isZooming = false; | |
2bad4d92 | 363 | tarp.uncover(); |
ccd9d7c2 PF |
364 | Dygraph.removeEvent(topElem, 'mousemove', onZoom); |
365 | Dygraph.removeEvent(topElem, 'mouseup', onZoomEnd); | |
366 | self.fgcanvas_.style.cursor = 'default'; | |
367 | ||
368 | // If using excanvas, Zoom now. | |
73c5deff | 369 | if (!dynamic) { |
ccd9d7c2 PF |
370 | doZoom(); |
371 | } | |
0c76da8d | 372 | return true; |
ccd9d7c2 PF |
373 | }; |
374 | ||
758a629f | 375 | doZoom = function() { |
ccd9d7c2 PF |
376 | try { |
377 | var zoomHandleStatus = self.getZoomHandleStatus_(); | |
378 | self.isChangingRange_ = true; | |
379 | if (!zoomHandleStatus.isZoomed) { | |
e4f6e11a | 380 | self.dygraph_.resetZoom(); |
ccd9d7c2 PF |
381 | } else { |
382 | var xDataWindow = toXDataWindow(zoomHandleStatus); | |
383 | self.dygraph_.doZoomXDates_(xDataWindow[0], xDataWindow[1]); | |
384 | } | |
385 | } finally { | |
386 | self.isChangingRange_ = false; | |
387 | } | |
388 | }; | |
389 | ||
758a629f | 390 | isMouseInPanZone = function(e) { |
920208fb PF |
391 | if (self.isUsingExcanvas_) { |
392 | return e.srcElement == self.iePanOverlay_; | |
393 | } else { | |
73c5deff PF |
394 | var rect = self.leftZoomHandle_.getBoundingClientRect(); |
395 | var leftHandleClientX = rect.left + rect.width/2; | |
396 | rect = self.rightZoomHandle_.getBoundingClientRect(); | |
397 | var rightHandleClientX = rect.left + rect.width/2; | |
398 | return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX); | |
920208fb | 399 | } |
ccd9d7c2 PF |
400 | }; |
401 | ||
758a629f | 402 | onPanStart = function(e) { |
ccd9d7c2 PF |
403 | if (!isPanning && isMouseInPanZone(e) && self.getZoomHandleStatus_().isZoomed) { |
404 | Dygraph.cancelEvent(e); | |
405 | isPanning = true; | |
406 | xLast = e.screenX; | |
6a4587ac RK |
407 | self.dygraph_.addEvent(topElem, 'mousemove', onPan); |
408 | self.dygraph_.addEvent(topElem, 'mouseup', onPanEnd); | |
0c76da8d | 409 | return true; |
ccd9d7c2 | 410 | } |
0c76da8d | 411 | return false; |
ccd9d7c2 PF |
412 | }; |
413 | ||
758a629f | 414 | onPan = function(e) { |
ccd9d7c2 | 415 | if (!isPanning) { |
0c76da8d | 416 | return false; |
ccd9d7c2 | 417 | } |
920208fb | 418 | Dygraph.cancelEvent(e); |
ccd9d7c2 PF |
419 | |
420 | var delX = e.screenX - xLast; | |
421 | if (Math.abs(delX) < 4) { | |
0c76da8d | 422 | return true; |
ccd9d7c2 PF |
423 | } |
424 | xLast = e.screenX; | |
0c76da8d | 425 | delX = applyBrowserZoomLevel(delX); |
ccd9d7c2 PF |
426 | |
427 | // Move range view | |
428 | var zoomHandleStatus = self.getZoomHandleStatus_(); | |
429 | var leftHandlePos = zoomHandleStatus.leftHandlePos; | |
430 | var rightHandlePos = zoomHandleStatus.rightHandlePos; | |
431 | var rangeSize = rightHandlePos - leftHandlePos; | |
432 | if (leftHandlePos + delX <= self.canvasRect_.x) { | |
433 | leftHandlePos = self.canvasRect_.x; | |
434 | rightHandlePos = leftHandlePos + rangeSize; | |
435 | } else if (rightHandlePos + delX >= self.canvasRect_.x + self.canvasRect_.w) { | |
436 | rightHandlePos = self.canvasRect_.x + self.canvasRect_.w; | |
437 | leftHandlePos = rightHandlePos - rangeSize; | |
438 | } else { | |
439 | leftHandlePos += delX; | |
440 | rightHandlePos += delX; | |
441 | } | |
920208fb | 442 | var halfHandleWidth = self.leftZoomHandle_.width/2; |
ccd9d7c2 PF |
443 | self.leftZoomHandle_.style.left = (leftHandlePos - halfHandleWidth) + 'px'; |
444 | self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px'; | |
445 | self.drawInteractiveLayer_(); | |
446 | ||
447 | // Do pan on the fly (if not using excanvas). | |
73c5deff | 448 | if (dynamic) { |
ccd9d7c2 PF |
449 | doPan(); |
450 | } | |
0c76da8d | 451 | return true; |
ccd9d7c2 PF |
452 | }; |
453 | ||
758a629f | 454 | onPanEnd = function(e) { |
ccd9d7c2 | 455 | if (!isPanning) { |
0c76da8d | 456 | return false; |
ccd9d7c2 PF |
457 | } |
458 | isPanning = false; | |
459 | Dygraph.removeEvent(topElem, 'mousemove', onPan); | |
460 | Dygraph.removeEvent(topElem, 'mouseup', onPanEnd); | |
461 | // If using excanvas, do pan now. | |
73c5deff | 462 | if (!dynamic) { |
ccd9d7c2 PF |
463 | doPan(); |
464 | } | |
0c76da8d | 465 | return true; |
ccd9d7c2 PF |
466 | }; |
467 | ||
758a629f | 468 | doPan = function() { |
ccd9d7c2 PF |
469 | try { |
470 | self.isChangingRange_ = true; | |
471 | self.dygraph_.dateWindow_ = toXDataWindow(self.getZoomHandleStatus_()); | |
472 | self.dygraph_.drawGraph_(false); | |
473 | } finally { | |
474 | self.isChangingRange_ = false; | |
475 | } | |
476 | }; | |
477 | ||
758a629f | 478 | onCanvasMouseMove = function(e) { |
ccd9d7c2 PF |
479 | if (isZooming || isPanning) { |
480 | return; | |
481 | } | |
482 | var cursor = isMouseInPanZone(e) ? 'move' : 'default'; | |
483 | if (cursor != self.fgcanvas_.style.cursor) { | |
484 | self.fgcanvas_.style.cursor = cursor; | |
485 | } | |
486 | }; | |
487 | ||
73c5deff | 488 | onZoomHandleTouchEvent = function(e) { |
0c76da8d PF |
489 | if (e.type == 'touchstart' && e.targetTouches.length == 1) { |
490 | if (onZoomStart(e.targetTouches[0])) { | |
491 | Dygraph.cancelEvent(e); | |
492 | } | |
493 | } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { | |
494 | if (onZoom(e.targetTouches[0])) { | |
495 | Dygraph.cancelEvent(e); | |
496 | } | |
73c5deff PF |
497 | } else { |
498 | onZoomEnd(e); | |
499 | } | |
500 | }; | |
501 | ||
502 | onCanvasTouchEvent = function(e) { | |
0c76da8d PF |
503 | if (e.type == 'touchstart' && e.targetTouches.length == 1) { |
504 | if (onPanStart(e.targetTouches[0])) { | |
505 | Dygraph.cancelEvent(e); | |
506 | } | |
507 | } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { | |
508 | if (onPan(e.targetTouches[0])) { | |
509 | Dygraph.cancelEvent(e); | |
510 | } | |
73c5deff PF |
511 | } else { |
512 | onPanEnd(e); | |
513 | } | |
514 | }; | |
515 | ||
516 | addTouchEvents = function(elem, fn) { | |
6a4587ac RK |
517 | var types = ['touchstart', 'touchend', 'touchmove', 'touchcancel']; |
518 | for (var i = 0; i < types.length; i++) { | |
519 | self.dygraph_.addEvent(elem, types[i], fn); | |
520 | } | |
73c5deff PF |
521 | }; |
522 | ||
ec475f44 PF |
523 | this.setDefaultOption_('interactionModel', Dygraph.Interaction.dragIsPanInteractionModel); |
524 | this.setDefaultOption_('panEdgeFraction', 0.0001); | |
ccd9d7c2 | 525 | |
920208fb | 526 | var dragStartEvent = window.opera ? 'mousedown' : 'dragstart'; |
6a4587ac RK |
527 | this.dygraph_.addEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart); |
528 | this.dygraph_.addEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart); | |
920208fb PF |
529 | |
530 | if (this.isUsingExcanvas_) { | |
6a4587ac | 531 | this.dygraph_.addEvent(this.iePanOverlay_, 'mousedown', onPanStart); |
920208fb | 532 | } else { |
6a4587ac RK |
533 | this.dygraph_.addEvent(this.fgcanvas_, 'mousedown', onPanStart); |
534 | this.dygraph_.addEvent(this.fgcanvas_, 'mousemove', onCanvasMouseMove); | |
920208fb | 535 | } |
73c5deff PF |
536 | |
537 | // Touch events | |
538 | if (this.hasTouchInterface_) { | |
539 | addTouchEvents(this.leftZoomHandle_, onZoomHandleTouchEvent); | |
540 | addTouchEvents(this.rightZoomHandle_, onZoomHandleTouchEvent); | |
541 | addTouchEvents(this.fgcanvas_, onCanvasTouchEvent); | |
542 | } | |
ccd9d7c2 PF |
543 | }; |
544 | ||
545 | /** | |
546 | * @private | |
547 | * Draws the static layer in the background canvas. | |
548 | */ | |
0d216a60 | 549 | rangeSelector.prototype.drawStaticLayer_ = function() { |
ccd9d7c2 PF |
550 | var ctx = this.bgcanvas_ctx_; |
551 | ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); | |
ccd9d7c2 PF |
552 | try { |
553 | this.drawMiniPlot_(); | |
554 | } catch(ex) { | |
5061b42f | 555 | Dygraph.warn(ex); |
ccd9d7c2 | 556 | } |
920208fb | 557 | |
758a629f | 558 | var margin = 0.5; |
920208fb PF |
559 | this.bgcanvas_ctx_.lineWidth = 1; |
560 | ctx.strokeStyle = 'gray'; | |
561 | ctx.beginPath(); | |
562 | ctx.moveTo(margin, margin); | |
563 | ctx.lineTo(margin, this.canvasRect_.h-margin); | |
564 | ctx.lineTo(this.canvasRect_.w-margin, this.canvasRect_.h-margin); | |
565 | ctx.lineTo(this.canvasRect_.w-margin, margin); | |
566 | ctx.stroke(); | |
ccd9d7c2 PF |
567 | }; |
568 | ||
569 | ||
570 | /** | |
571 | * @private | |
572 | * Draws the mini plot in the background canvas. | |
573 | */ | |
0d216a60 | 574 | rangeSelector.prototype.drawMiniPlot_ = function() { |
ec475f44 PF |
575 | var fillStyle = this.getOption_('rangeSelectorPlotFillColor'); |
576 | var strokeStyle = this.getOption_('rangeSelectorPlotStrokeColor'); | |
ccd9d7c2 PF |
577 | if (!fillStyle && !strokeStyle) { |
578 | return; | |
579 | } | |
580 | ||
ec475f44 | 581 | var stepPlot = this.getOption_('stepPlot'); |
e03d443c | 582 | |
ccd9d7c2 PF |
583 | var combinedSeriesData = this.computeCombinedSeriesAndLimits_(); |
584 | var yRange = combinedSeriesData.yMax - combinedSeriesData.yMin; | |
585 | ||
586 | // Draw the mini plot. | |
587 | var ctx = this.bgcanvas_ctx_; | |
758a629f | 588 | var margin = 0.5; |
ccd9d7c2 PF |
589 | |
590 | var xExtremes = this.dygraph_.xAxisExtremes(); | |
591 | var xRange = Math.max(xExtremes[1] - xExtremes[0], 1.e-30); | |
592 | var xFact = (this.canvasRect_.w - margin)/xRange; | |
593 | var yFact = (this.canvasRect_.h - margin)/yRange; | |
594 | var canvasWidth = this.canvasRect_.w - margin; | |
595 | var canvasHeight = this.canvasRect_.h - margin; | |
596 | ||
e03d443c WB |
597 | var prevX = null, prevY = null; |
598 | ||
ccd9d7c2 PF |
599 | ctx.beginPath(); |
600 | ctx.moveTo(margin, canvasHeight); | |
601 | for (var i = 0; i < combinedSeriesData.data.length; i++) { | |
602 | var dataPoint = combinedSeriesData.data[i]; | |
e03d443c WB |
603 | var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN); |
604 | var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN); | |
ccd9d7c2 | 605 | if (isFinite(x) && isFinite(y)) { |
e03d443c | 606 | if(prevX === null) { |
87196f1b WB |
607 | ctx.lineTo(x, canvasHeight); |
608 | } | |
609 | else if (stepPlot) { | |
610 | ctx.lineTo(x, prevY); | |
611 | } | |
ccd9d7c2 | 612 | ctx.lineTo(x, y); |
e03d443c | 613 | prevX = x; |
87196f1b | 614 | prevY = y; |
ccd9d7c2 | 615 | } |
e03d443c | 616 | else { |
87196f1b WB |
617 | if(prevX !== null) { |
618 | if (stepPlot) { | |
619 | ctx.lineTo(x, prevY); | |
620 | ctx.lineTo(x, canvasHeight); | |
621 | } | |
622 | else { | |
623 | ctx.lineTo(prevX, canvasHeight); | |
624 | } | |
625 | } | |
626 | prevX = prevY = null; | |
627 | } | |
ccd9d7c2 PF |
628 | } |
629 | ctx.lineTo(canvasWidth, canvasHeight); | |
630 | ctx.closePath(); | |
631 | ||
632 | if (fillStyle) { | |
633 | var lingrad = this.bgcanvas_ctx_.createLinearGradient(0, 0, 0, canvasHeight); | |
634 | lingrad.addColorStop(0, 'white'); | |
635 | lingrad.addColorStop(1, fillStyle); | |
636 | this.bgcanvas_ctx_.fillStyle = lingrad; | |
637 | ctx.fill(); | |
638 | } | |
639 | ||
640 | if (strokeStyle) { | |
641 | this.bgcanvas_ctx_.strokeStyle = strokeStyle; | |
642 | this.bgcanvas_ctx_.lineWidth = 1.5; | |
643 | ctx.stroke(); | |
644 | } | |
645 | }; | |
646 | ||
647 | /** | |
648 | * @private | |
649 | * Computes and returns the combinded series data along with min/max for the mini plot. | |
650 | * @return {Object} An object containing combinded series array, ymin, ymax. | |
651 | */ | |
0d216a60 | 652 | rangeSelector.prototype.computeCombinedSeriesAndLimits_ = function() { |
ccd9d7c2 | 653 | var data = this.dygraph_.rawData_; |
ec475f44 | 654 | var logscale = this.getOption_('logscale'); |
ccd9d7c2 PF |
655 | |
656 | // Create a combined series (average of all series values). | |
657 | var combinedSeries = []; | |
658 | var sum; | |
659 | var count; | |
3810c27a | 660 | var mutipleValues; |
758a629f | 661 | var i, j, k; |
73c5deff | 662 | var xVal, yVal; |
ccd9d7c2 | 663 | |
3810c27a PF |
664 | // Find out if data has multiple values per datapoint. |
665 | // Go to first data point that actually has values (see http://code.google.com/p/dygraphs/issues/detail?id=246) | |
666 | for (i = 0; i < data.length; i++) { | |
73c5deff | 667 | if (data[i].length > 1 && data[i][1] !== null) { |
3810c27a PF |
668 | mutipleValues = typeof data[i][1] != 'number'; |
669 | if (mutipleValues) { | |
670 | sum = []; | |
671 | count = []; | |
0826981a | 672 | for (k = 0; k < data[i][1].length; k++) { |
3810c27a PF |
673 | sum.push(0); |
674 | count.push(0); | |
675 | } | |
676 | } | |
677 | break; | |
ccd9d7c2 | 678 | } |
ccd9d7c2 PF |
679 | } |
680 | ||
758a629f | 681 | for (i = 0; i < data.length; i++) { |
ccd9d7c2 | 682 | var dataPoint = data[i]; |
73c5deff | 683 | xVal = dataPoint[0]; |
ccd9d7c2 PF |
684 | |
685 | if (mutipleValues) { | |
758a629f | 686 | for (k = 0; k < sum.length; k++) { |
ccd9d7c2 PF |
687 | sum[k] = count[k] = 0; |
688 | } | |
689 | } else { | |
690 | sum = count = 0; | |
691 | } | |
692 | ||
758a629f | 693 | for (j = 1; j < dataPoint.length; j++) { |
ccd9d7c2 | 694 | if (this.dygraph_.visibility()[j-1]) { |
73c5deff | 695 | var y; |
ccd9d7c2 | 696 | if (mutipleValues) { |
758a629f DV |
697 | for (k = 0; k < sum.length; k++) { |
698 | y = dataPoint[j][k]; | |
699 | if (y === null || isNaN(y)) continue; | |
ccd9d7c2 PF |
700 | sum[k] += y; |
701 | count[k]++; | |
702 | } | |
703 | } else { | |
758a629f DV |
704 | y = dataPoint[j]; |
705 | if (y === null || isNaN(y)) continue; | |
ccd9d7c2 PF |
706 | sum += y; |
707 | count++; | |
708 | } | |
709 | } | |
710 | } | |
711 | ||
712 | if (mutipleValues) { | |
758a629f | 713 | for (k = 0; k < sum.length; k++) { |
ccd9d7c2 PF |
714 | sum[k] /= count[k]; |
715 | } | |
716 | yVal = sum.slice(0); | |
717 | } else { | |
718 | yVal = sum/count; | |
719 | } | |
720 | ||
721 | combinedSeries.push([xVal, yVal]); | |
722 | } | |
723 | ||
724 | // Account for roll period, fractions. | |
725 | combinedSeries = this.dygraph_.rollingAverage(combinedSeries, this.dygraph_.rollPeriod_); | |
726 | ||
727 | if (typeof combinedSeries[0][1] != 'number') { | |
758a629f DV |
728 | for (i = 0; i < combinedSeries.length; i++) { |
729 | yVal = combinedSeries[i][1]; | |
ccd9d7c2 PF |
730 | combinedSeries[i][1] = yVal[0]; |
731 | } | |
732 | } | |
733 | ||
734 | // Compute the y range. | |
735 | var yMin = Number.MAX_VALUE; | |
736 | var yMax = -Number.MAX_VALUE; | |
758a629f DV |
737 | for (i = 0; i < combinedSeries.length; i++) { |
738 | yVal = combinedSeries[i][1]; | |
739 | if (yVal !== null && isFinite(yVal) && (!logscale || yVal > 0)) { | |
ccd9d7c2 PF |
740 | yMin = Math.min(yMin, yVal); |
741 | yMax = Math.max(yMax, yVal); | |
742 | } | |
743 | } | |
744 | ||
745 | // Convert Y data to log scale if needed. | |
746 | // Also, expand the Y range to compress the mini plot a little. | |
758a629f | 747 | var extraPercent = 0.25; |
ccd9d7c2 PF |
748 | if (logscale) { |
749 | yMax = Dygraph.log10(yMax); | |
750 | yMax += yMax*extraPercent; | |
751 | yMin = Dygraph.log10(yMin); | |
758a629f | 752 | for (i = 0; i < combinedSeries.length; i++) { |
ccd9d7c2 PF |
753 | combinedSeries[i][1] = Dygraph.log10(combinedSeries[i][1]); |
754 | } | |
755 | } else { | |
756 | var yExtra; | |
5061b42f | 757 | var yRange = yMax - yMin; |
ccd9d7c2 PF |
758 | if (yRange <= Number.MIN_VALUE) { |
759 | yExtra = yMax*extraPercent; | |
760 | } else { | |
761 | yExtra = yRange*extraPercent; | |
762 | } | |
763 | yMax += yExtra; | |
764 | yMin -= yExtra; | |
765 | } | |
766 | ||
767 | return {data: combinedSeries, yMin: yMin, yMax: yMax}; | |
768 | }; | |
769 | ||
770 | /** | |
771 | * @private | |
772 | * Places the zoom handles in the proper position based on the current X data window. | |
773 | */ | |
0d216a60 | 774 | rangeSelector.prototype.placeZoomHandles_ = function() { |
ccd9d7c2 PF |
775 | var xExtremes = this.dygraph_.xAxisExtremes(); |
776 | var xWindowLimits = this.dygraph_.xAxisRange(); | |
777 | var xRange = xExtremes[1] - xExtremes[0]; | |
778 | var leftPercent = Math.max(0, (xWindowLimits[0] - xExtremes[0])/xRange); | |
779 | var rightPercent = Math.max(0, (xExtremes[1] - xWindowLimits[1])/xRange); | |
780 | var leftCoord = this.canvasRect_.x + this.canvasRect_.w*leftPercent; | |
781 | var rightCoord = this.canvasRect_.x + this.canvasRect_.w*(1 - rightPercent); | |
920208fb PF |
782 | var handleTop = Math.max(this.canvasRect_.y, this.canvasRect_.y + (this.canvasRect_.h - this.leftZoomHandle_.height)/2); |
783 | var halfHandleWidth = this.leftZoomHandle_.width/2; | |
784 | this.leftZoomHandle_.style.left = (leftCoord - halfHandleWidth) + 'px'; | |
ccd9d7c2 | 785 | this.leftZoomHandle_.style.top = handleTop + 'px'; |
920208fb | 786 | this.rightZoomHandle_.style.left = (rightCoord - halfHandleWidth) + 'px'; |
ccd9d7c2 PF |
787 | this.rightZoomHandle_.style.top = this.leftZoomHandle_.style.top; |
788 | ||
789 | this.leftZoomHandle_.style.visibility = 'visible'; | |
790 | this.rightZoomHandle_.style.visibility = 'visible'; | |
791 | }; | |
792 | ||
793 | /** | |
794 | * @private | |
795 | * Draws the interactive layer in the foreground canvas. | |
796 | */ | |
0d216a60 | 797 | rangeSelector.prototype.drawInteractiveLayer_ = function() { |
ccd9d7c2 PF |
798 | var ctx = this.fgcanvas_ctx_; |
799 | ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); | |
800 | var margin = 1; | |
801 | var width = this.canvasRect_.w - margin; | |
802 | var height = this.canvasRect_.h - margin; | |
803 | var zoomHandleStatus = this.getZoomHandleStatus_(); | |
804 | ||
805 | ctx.strokeStyle = 'black'; | |
806 | if (!zoomHandleStatus.isZoomed) { | |
807 | ctx.beginPath(); | |
808 | ctx.moveTo(margin, margin); | |
809 | ctx.lineTo(margin, height); | |
810 | ctx.lineTo(width, height); | |
811 | ctx.lineTo(width, margin); | |
812 | ctx.stroke(); | |
920208fb PF |
813 | if (this.iePanOverlay_) { |
814 | this.iePanOverlay_.style.display = 'none'; | |
815 | } | |
ccd9d7c2 | 816 | } else { |
5061b42f DV |
817 | var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x); |
818 | var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x); | |
ccd9d7c2 PF |
819 | |
820 | ctx.fillStyle = 'rgba(240, 240, 240, 0.6)'; | |
920208fb PF |
821 | ctx.fillRect(0, 0, leftHandleCanvasPos, this.canvasRect_.h); |
822 | ctx.fillRect(rightHandleCanvasPos, 0, this.canvasRect_.w - rightHandleCanvasPos, this.canvasRect_.h); | |
ccd9d7c2 PF |
823 | |
824 | ctx.beginPath(); | |
825 | ctx.moveTo(margin, margin); | |
826 | ctx.lineTo(leftHandleCanvasPos, margin); | |
827 | ctx.lineTo(leftHandleCanvasPos, height); | |
828 | ctx.lineTo(rightHandleCanvasPos, height); | |
829 | ctx.lineTo(rightHandleCanvasPos, margin); | |
830 | ctx.lineTo(width, margin); | |
831 | ctx.stroke(); | |
920208fb PF |
832 | |
833 | if (this.isUsingExcanvas_) { | |
834 | this.iePanOverlay_.style.width = (rightHandleCanvasPos - leftHandleCanvasPos) + 'px'; | |
835 | this.iePanOverlay_.style.left = leftHandleCanvasPos + 'px'; | |
836 | this.iePanOverlay_.style.height = height + 'px'; | |
837 | this.iePanOverlay_.style.display = 'inline'; | |
838 | } | |
ccd9d7c2 PF |
839 | } |
840 | }; | |
841 | ||
842 | /** | |
843 | * @private | |
844 | * Returns the current zoom handle position information. | |
845 | * @return {Object} The zoom handle status. | |
846 | */ | |
0d216a60 | 847 | rangeSelector.prototype.getZoomHandleStatus_ = function() { |
920208fb | 848 | var halfHandleWidth = this.leftZoomHandle_.width/2; |
758a629f DV |
849 | var leftHandlePos = parseInt(this.leftZoomHandle_.style.left, 10) + halfHandleWidth; |
850 | var rightHandlePos = parseInt(this.rightZoomHandle_.style.left, 10) + halfHandleWidth; | |
ccd9d7c2 PF |
851 | return { |
852 | leftHandlePos: leftHandlePos, | |
853 | rightHandlePos: rightHandlePos, | |
854 | isZoomed: (leftHandlePos - 1 > this.canvasRect_.x || rightHandlePos + 1 < this.canvasRect_.x+this.canvasRect_.w) | |
855 | }; | |
856 | }; | |
0d216a60 PF |
857 | |
858 | return rangeSelector; | |
859 | ||
860 | })(); |