+++ /dev/null
-/*
- * @license
- * Copyright 2011 Paul Felix (paul.eric.felix@gmail.com)
- * MIT-licensed (http://opensource.org/licenses/MIT)
- */
-
-/**
- * @fileoverview This file contains the DygraphRangeSelector class used to provide
- * a timeline range selector widget for dygraphs.
- */
-
-/*jshint globalstrict: true */
-/*global Dygraph:false */
-"use strict";
-
-/**
- * The DygraphRangeSelector class provides a timeline range selector widget.
- * @param {Dygraph} dygraph The dygraph object
- * @constructor
- */
-var DygraphRangeSelector = function(dygraph) {
- this.isIE_ = /MSIE/.test(navigator.userAgent) && !window.opera;
- this.isUsingExcanvas_ = dygraph.isUsingExcanvas_;
- this.dygraph_ = dygraph;
- this.hasTouchInterface_ = typeof(TouchEvent) != 'undefined';
- this.isMobileDevice_ = /mobile|android/gi.test(navigator.appVersion);
- this.createCanvases_();
- if (this.isUsingExcanvas_) {
- this.createIEPanOverlay_();
- }
- this.createZoomHandles_();
- this.initInteraction_();
-};
-
-/**
- * Adds the range selector to the dygraph.
- * @param {Object} graphDiv The container div for the range selector.
- * @param {DygraphLayout} layout The DygraphLayout object for this graph.
- */
-DygraphRangeSelector.prototype.addToGraph = function(graphDiv, layout) {
- this.layout_ = layout;
- this.resize_();
- graphDiv.appendChild(this.bgcanvas_);
- graphDiv.appendChild(this.fgcanvas_);
- graphDiv.appendChild(this.leftZoomHandle_);
- graphDiv.appendChild(this.rightZoomHandle_);
-};
-
-/**
- * Renders the static background portion of the range selector.
- */
-DygraphRangeSelector.prototype.renderStaticLayer = function() {
- this.resize_();
- this.drawStaticLayer_();
-};
-
-/**
- * Renders the interactive foreground portion of the range selector.
- */
-DygraphRangeSelector.prototype.renderInteractiveLayer = function() {
- if (this.isChangingRange_) {
- return;
- }
- this.placeZoomHandles_();
- this.drawInteractiveLayer_();
-};
-
-/**
- * @private
- * Resizes the range selector.
- */
-DygraphRangeSelector.prototype.resize_ = function() {
- function setElementRect(canvas, rect) {
- canvas.style.top = rect.y + 'px';
- canvas.style.left = rect.x + 'px';
- canvas.width = rect.w;
- canvas.height = rect.h;
- canvas.style.width = canvas.width + 'px'; // for IE
- canvas.style.height = canvas.height + 'px'; // for IE
- }
-
- var plotArea = this.layout_.getPlotArea();
- var xAxisLabelHeight = this.attr_('xAxisHeight') || (this.attr_('axisLabelFontSize') + 2 * this.attr_('axisTickSize'));
- this.canvasRect_ = {
- x: plotArea.x,
- y: plotArea.y + plotArea.h + xAxisLabelHeight + 4,
- w: plotArea.w,
- h: this.attr_('rangeSelectorHeight')
- };
-
- setElementRect(this.bgcanvas_, this.canvasRect_);
- setElementRect(this.fgcanvas_, this.canvasRect_);
-};
-
-DygraphRangeSelector.prototype.attr_ = function(name) {
- return this.dygraph_.attr_(name);
-};
-
-/**
- * @private
- * Creates the background and foreground canvases.
- */
-DygraphRangeSelector.prototype.createCanvases_ = function() {
- this.bgcanvas_ = Dygraph.createCanvas();
- this.bgcanvas_.className = 'dygraph-rangesel-bgcanvas';
- this.bgcanvas_.style.position = 'absolute';
- this.bgcanvas_.style.zIndex = 9;
- this.bgcanvas_ctx_ = Dygraph.getContext(this.bgcanvas_);
-
- this.fgcanvas_ = Dygraph.createCanvas();
- this.fgcanvas_.className = 'dygraph-rangesel-fgcanvas';
- this.fgcanvas_.style.position = 'absolute';
- this.fgcanvas_.style.zIndex = 9;
- this.fgcanvas_.style.cursor = 'default';
- this.fgcanvas_ctx_ = Dygraph.getContext(this.fgcanvas_);
-};
-
-/**
- * @private
- * Creates overlay divs for IE/Excanvas so that mouse events are handled properly.
- */
-DygraphRangeSelector.prototype.createIEPanOverlay_ = function() {
- this.iePanOverlay_ = document.createElement("div");
- this.iePanOverlay_.style.position = 'absolute';
- this.iePanOverlay_.style.backgroundColor = 'white';
- this.iePanOverlay_.style.filter = 'alpha(opacity=0)';
- this.iePanOverlay_.style.display = 'none';
- this.iePanOverlay_.style.cursor = 'move';
- this.fgcanvas_.appendChild(this.iePanOverlay_);
-};
-
-/**
- * @private
- * Creates the zoom handle elements.
- */
-DygraphRangeSelector.prototype.createZoomHandles_ = function() {
- var img = new Image();
- img.className = 'dygraph-rangesel-zoomhandle';
- img.style.position = 'absolute';
- img.style.zIndex = 10;
- img.style.visibility = 'hidden'; // Initially hidden so they don't show up in the wrong place.
- img.style.cursor = 'col-resize';
-
- if (/MSIE 7/.test(navigator.userAgent)) { // IE7 doesn't support embedded src data.
- img.width = 7;
- img.height = 14;
- img.style.backgroundColor = 'white';
- img.style.border = '1px solid #333333'; // Just show box in IE7.
- } else {
- img.width = 9;
- img.height = 16;
- img.src = 'data:image/png;base64,' +
-'iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAA' +
-'zwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENv' +
-'bW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl' +
-'6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7s' +
-'qSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII=';
- }
-
- if (this.isMobileDevice_) {
- img.width *= 2;
- img.height *= 2;
- }
-
- this.leftZoomHandle_ = img;
- this.rightZoomHandle_ = img.cloneNode(false);
-};
-
-/**
- * @private
- * Sets up the interaction for the range selector.
- */
-DygraphRangeSelector.prototype.initInteraction_ = function() {
- var self = this;
- var topElem = this.isIE_ ? document : window;
- var xLast = 0;
- var handle = null;
- var isZooming = false;
- var isPanning = false;
- var dynamic = !this.isMobileDevice_ && !this.isUsingExcanvas_;
-
- // We cover iframes during mouse interactions. See comments in
- // dygraph-utils.js for more info on why this is a good idea.
- var tarp = new Dygraph.IFrameTarp();
-
- // functions, defined below. Defining them this way (rather than with
- // "function foo() {...}" makes JSHint happy.
- var toXDataWindow, onZoomStart, onZoom, onZoomEnd, doZoom, isMouseInPanZone,
- onPanStart, onPan, onPanEnd, doPan, onCanvasMouseMove, applyBrowserZoomLevel;
-
- // Touch event functions
- var onZoomHandleTouchEvent, onCanvasTouchEvent, addTouchEvents;
-
- toXDataWindow = function(zoomHandleStatus) {
- var xDataLimits = self.dygraph_.xAxisExtremes();
- var fact = (xDataLimits[1] - xDataLimits[0])/self.canvasRect_.w;
- var xDataMin = xDataLimits[0] + (zoomHandleStatus.leftHandlePos - self.canvasRect_.x)*fact;
- var xDataMax = xDataLimits[0] + (zoomHandleStatus.rightHandlePos - self.canvasRect_.x)*fact;
- return [xDataMin, xDataMax];
- };
-
- applyBrowserZoomLevel = function(delX) {
- var zoom = window.outerWidth/document.documentElement.clientWidth;
- if (!isNaN(zoom)) {
- return delX/zoom;
- } else {
- return delX;
- }
- };
-
- onZoomStart = function(e) {
- Dygraph.cancelEvent(e);
- isZooming = true;
- xLast = e.screenX;
- handle = e.target ? e.target : e.srcElement;
- self.dygraph_.addEvent(topElem, 'mousemove', onZoom);
- self.dygraph_.addEvent(topElem, 'mouseup', onZoomEnd);
- self.fgcanvas_.style.cursor = 'col-resize';
- tarp.cover();
- return true;
- };
-
- onZoom = function(e) {
- if (!isZooming) {
- return false;
- }
- Dygraph.cancelEvent(e);
- var delX = e.screenX - xLast;
- if (Math.abs(delX) < 4 || e.screenX === 0) {
- // First iPad move event seems to have screenX = 0
- return true;
- }
- xLast = e.screenX;
- delX = applyBrowserZoomLevel(delX);
-
- // Move handle.
- var zoomHandleStatus = self.getZoomHandleStatus_();
- var newPos;
- if (handle == self.leftZoomHandle_) {
- newPos = zoomHandleStatus.leftHandlePos + delX;
- newPos = Math.min(newPos, zoomHandleStatus.rightHandlePos - handle.width - 3);
- newPos = Math.max(newPos, self.canvasRect_.x);
- } else {
- newPos = zoomHandleStatus.rightHandlePos + delX;
- newPos = Math.min(newPos, self.canvasRect_.x + self.canvasRect_.w);
- newPos = Math.max(newPos, zoomHandleStatus.leftHandlePos + handle.width + 3);
- }
- var halfHandleWidth = handle.width/2;
- handle.style.left = (newPos - halfHandleWidth) + 'px';
- self.drawInteractiveLayer_();
-
- // Zoom on the fly (if not using excanvas).
- if (dynamic) {
- doZoom();
- }
- return true;
- };
-
- onZoomEnd = function(e) {
- if (!isZooming) {
- return false;
- }
- isZooming = false;
- tarp.uncover();
- Dygraph.removeEvent(topElem, 'mousemove', onZoom);
- Dygraph.removeEvent(topElem, 'mouseup', onZoomEnd);
- self.fgcanvas_.style.cursor = 'default';
-
- // If using excanvas, Zoom now.
- if (!dynamic) {
- doZoom();
- }
- return true;
- };
-
- doZoom = function() {
- try {
- var zoomHandleStatus = self.getZoomHandleStatus_();
- self.isChangingRange_ = true;
- if (!zoomHandleStatus.isZoomed) {
- self.dygraph_.resetZoom();
- } else {
- var xDataWindow = toXDataWindow(zoomHandleStatus);
- self.dygraph_.doZoomXDates_(xDataWindow[0], xDataWindow[1]);
- }
- } finally {
- self.isChangingRange_ = false;
- }
- };
-
- isMouseInPanZone = function(e) {
- if (self.isUsingExcanvas_) {
- return e.srcElement == self.iePanOverlay_;
- } else {
- var rect = self.leftZoomHandle_.getBoundingClientRect();
- var leftHandleClientX = rect.left + rect.width/2;
- rect = self.rightZoomHandle_.getBoundingClientRect();
- var rightHandleClientX = rect.left + rect.width/2;
- return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX);
- }
- };
-
- onPanStart = function(e) {
- if (!isPanning && isMouseInPanZone(e) && self.getZoomHandleStatus_().isZoomed) {
- Dygraph.cancelEvent(e);
- isPanning = true;
- xLast = e.screenX;
- self.dygraph_.addEvent(topElem, 'mousemove', onPan);
- self.dygraph_.addEvent(topElem, 'mouseup', onPanEnd);
- return true;
- }
- return false;
- };
-
- onPan = function(e) {
- if (!isPanning) {
- return false;
- }
- Dygraph.cancelEvent(e);
-
- var delX = e.screenX - xLast;
- if (Math.abs(delX) < 4) {
- return true;
- }
- xLast = e.screenX;
- delX = applyBrowserZoomLevel(delX);
-
- // Move range view
- var zoomHandleStatus = self.getZoomHandleStatus_();
- var leftHandlePos = zoomHandleStatus.leftHandlePos;
- var rightHandlePos = zoomHandleStatus.rightHandlePos;
- var rangeSize = rightHandlePos - leftHandlePos;
- if (leftHandlePos + delX <= self.canvasRect_.x) {
- leftHandlePos = self.canvasRect_.x;
- rightHandlePos = leftHandlePos + rangeSize;
- } else if (rightHandlePos + delX >= self.canvasRect_.x + self.canvasRect_.w) {
- rightHandlePos = self.canvasRect_.x + self.canvasRect_.w;
- leftHandlePos = rightHandlePos - rangeSize;
- } else {
- leftHandlePos += delX;
- rightHandlePos += delX;
- }
- var halfHandleWidth = self.leftZoomHandle_.width/2;
- self.leftZoomHandle_.style.left = (leftHandlePos - halfHandleWidth) + 'px';
- self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px';
- self.drawInteractiveLayer_();
-
- // Do pan on the fly (if not using excanvas).
- if (dynamic) {
- doPan();
- }
- return true;
- };
-
- onPanEnd = function(e) {
- if (!isPanning) {
- return false;
- }
- isPanning = false;
- Dygraph.removeEvent(topElem, 'mousemove', onPan);
- Dygraph.removeEvent(topElem, 'mouseup', onPanEnd);
- // If using excanvas, do pan now.
- if (!dynamic) {
- doPan();
- }
- return true;
- };
-
- doPan = function() {
- try {
- self.isChangingRange_ = true;
- self.dygraph_.dateWindow_ = toXDataWindow(self.getZoomHandleStatus_());
- self.dygraph_.drawGraph_(false);
- } finally {
- self.isChangingRange_ = false;
- }
- };
-
- onCanvasMouseMove = function(e) {
- if (isZooming || isPanning) {
- return;
- }
- var cursor = isMouseInPanZone(e) ? 'move' : 'default';
- if (cursor != self.fgcanvas_.style.cursor) {
- self.fgcanvas_.style.cursor = cursor;
- }
- };
-
- onZoomHandleTouchEvent = function(e) {
- if (e.type == 'touchstart' && e.targetTouches.length == 1) {
- if (onZoomStart(e.targetTouches[0])) {
- Dygraph.cancelEvent(e);
- }
- } else if (e.type == 'touchmove' && e.targetTouches.length == 1) {
- if (onZoom(e.targetTouches[0])) {
- Dygraph.cancelEvent(e);
- }
- } else {
- onZoomEnd(e);
- }
- };
-
- onCanvasTouchEvent = function(e) {
- if (e.type == 'touchstart' && e.targetTouches.length == 1) {
- if (onPanStart(e.targetTouches[0])) {
- Dygraph.cancelEvent(e);
- }
- } else if (e.type == 'touchmove' && e.targetTouches.length == 1) {
- if (onPan(e.targetTouches[0])) {
- Dygraph.cancelEvent(e);
- }
- } else {
- onPanEnd(e);
- }
- };
-
- addTouchEvents = function(elem, fn) {
- var types = ['touchstart', 'touchend', 'touchmove', 'touchcancel'];
- for (var i = 0; i < types.length; i++) {
- self.dygraph_.addEvent(elem, types[i], fn);
- }
- };
-
- this.dygraph_.attrs_.interactionModel =
- Dygraph.Interaction.dragIsPanInteractionModel;
- this.dygraph_.attrs_.panEdgeFraction = 0.0001;
-
- var dragStartEvent = window.opera ? 'mousedown' : 'dragstart';
- this.dygraph_.addEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart);
- this.dygraph_.addEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart);
-
- if (this.isUsingExcanvas_) {
- this.dygraph_.addEvent(this.iePanOverlay_, 'mousedown', onPanStart);
- } else {
- this.dygraph_.addEvent(this.fgcanvas_, 'mousedown', onPanStart);
- this.dygraph_.addEvent(this.fgcanvas_, 'mousemove', onCanvasMouseMove);
- }
-
- // Touch events
- if (this.hasTouchInterface_) {
- addTouchEvents(this.leftZoomHandle_, onZoomHandleTouchEvent);
- addTouchEvents(this.rightZoomHandle_, onZoomHandleTouchEvent);
- addTouchEvents(this.fgcanvas_, onCanvasTouchEvent);
- }
-};
-
-/**
- * @private
- * Draws the static layer in the background canvas.
- */
-DygraphRangeSelector.prototype.drawStaticLayer_ = function() {
- var ctx = this.bgcanvas_ctx_;
- ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h);
- try {
- this.drawMiniPlot_();
- } catch(ex) {
- Dygraph.warn(ex);
- }
-
- var margin = 0.5;
- this.bgcanvas_ctx_.lineWidth = 1;
- ctx.strokeStyle = 'gray';
- ctx.beginPath();
- ctx.moveTo(margin, margin);
- ctx.lineTo(margin, this.canvasRect_.h-margin);
- ctx.lineTo(this.canvasRect_.w-margin, this.canvasRect_.h-margin);
- ctx.lineTo(this.canvasRect_.w-margin, margin);
- ctx.stroke();
-};
-
-
-/**
- * @private
- * Draws the mini plot in the background canvas.
- */
-DygraphRangeSelector.prototype.drawMiniPlot_ = function() {
- var fillStyle = this.attr_('rangeSelectorPlotFillColor');
- var strokeStyle = this.attr_('rangeSelectorPlotStrokeColor');
- if (!fillStyle && !strokeStyle) {
- return;
- }
-
- var stepPlot = this.attr_('stepPlot');
-
- var combinedSeriesData = this.computeCombinedSeriesAndLimits_();
- var yRange = combinedSeriesData.yMax - combinedSeriesData.yMin;
-
- // Draw the mini plot.
- var ctx = this.bgcanvas_ctx_;
- var margin = 0.5;
-
- var xExtremes = this.dygraph_.xAxisExtremes();
- var xRange = Math.max(xExtremes[1] - xExtremes[0], 1.e-30);
- var xFact = (this.canvasRect_.w - margin)/xRange;
- var yFact = (this.canvasRect_.h - margin)/yRange;
- var canvasWidth = this.canvasRect_.w - margin;
- var canvasHeight = this.canvasRect_.h - margin;
-
- var prevX = null, prevY = null;
-
- ctx.beginPath();
- ctx.moveTo(margin, canvasHeight);
- for (var i = 0; i < combinedSeriesData.data.length; i++) {
- var dataPoint = combinedSeriesData.data[i];
- var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN);
- var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN);
- if (isFinite(x) && isFinite(y)) {
- if(prevX === null) {
- ctx.lineTo(x, canvasHeight);
- }
- else if (stepPlot) {
- ctx.lineTo(x, prevY);
- }
- ctx.lineTo(x, y);
- prevX = x;
- prevY = y;
- }
- else {
- if(prevX !== null) {
- if (stepPlot) {
- ctx.lineTo(x, prevY);
- ctx.lineTo(x, canvasHeight);
- }
- else {
- ctx.lineTo(prevX, canvasHeight);
- }
- }
- prevX = prevY = null;
- }
- }
- ctx.lineTo(canvasWidth, canvasHeight);
- ctx.closePath();
-
- if (fillStyle) {
- var lingrad = this.bgcanvas_ctx_.createLinearGradient(0, 0, 0, canvasHeight);
- lingrad.addColorStop(0, 'white');
- lingrad.addColorStop(1, fillStyle);
- this.bgcanvas_ctx_.fillStyle = lingrad;
- ctx.fill();
- }
-
- if (strokeStyle) {
- this.bgcanvas_ctx_.strokeStyle = strokeStyle;
- this.bgcanvas_ctx_.lineWidth = 1.5;
- ctx.stroke();
- }
-};
-
-/**
- * @private
- * Computes and returns the combinded series data along with min/max for the mini plot.
- * @return {Object} An object containing combinded series array, ymin, ymax.
- */
-DygraphRangeSelector.prototype.computeCombinedSeriesAndLimits_ = function() {
- var data = this.dygraph_.rawData_;
- var logscale = this.attr_('logscale');
-
- // Create a combined series (average of all series values).
- var combinedSeries = [];
- var sum;
- var count;
- var mutipleValues;
- var i, j, k;
- var xVal, yVal;
-
- // Find out if data has multiple values per datapoint.
- // Go to first data point that actually has values (see http://code.google.com/p/dygraphs/issues/detail?id=246)
- for (i = 0; i < data.length; i++) {
- if (data[i].length > 1 && data[i][1] !== null) {
- mutipleValues = typeof data[i][1] != 'number';
- if (mutipleValues) {
- sum = [];
- count = [];
- for (k = 0; k < data[i][1].length; k++) {
- sum.push(0);
- count.push(0);
- }
- }
- break;
- }
- }
-
- for (i = 0; i < data.length; i++) {
- var dataPoint = data[i];
- xVal = dataPoint[0];
-
- if (mutipleValues) {
- for (k = 0; k < sum.length; k++) {
- sum[k] = count[k] = 0;
- }
- } else {
- sum = count = 0;
- }
-
- for (j = 1; j < dataPoint.length; j++) {
- if (this.dygraph_.visibility()[j-1]) {
- var y;
- if (mutipleValues) {
- for (k = 0; k < sum.length; k++) {
- y = dataPoint[j][k];
- if (y === null || isNaN(y)) continue;
- sum[k] += y;
- count[k]++;
- }
- } else {
- y = dataPoint[j];
- if (y === null || isNaN(y)) continue;
- sum += y;
- count++;
- }
- }
- }
-
- if (mutipleValues) {
- for (k = 0; k < sum.length; k++) {
- sum[k] /= count[k];
- }
- yVal = sum.slice(0);
- } else {
- yVal = sum/count;
- }
-
- combinedSeries.push([xVal, yVal]);
- }
-
- // Account for roll period, fractions.
- combinedSeries = this.dygraph_.rollingAverage(combinedSeries, this.dygraph_.rollPeriod_);
-
- if (typeof combinedSeries[0][1] != 'number') {
- for (i = 0; i < combinedSeries.length; i++) {
- yVal = combinedSeries[i][1];
- combinedSeries[i][1] = yVal[0];
- }
- }
-
- // Compute the y range.
- var yMin = Number.MAX_VALUE;
- var yMax = -Number.MAX_VALUE;
- for (i = 0; i < combinedSeries.length; i++) {
- yVal = combinedSeries[i][1];
- if (yVal !== null && isFinite(yVal) && (!logscale || yVal > 0)) {
- yMin = Math.min(yMin, yVal);
- yMax = Math.max(yMax, yVal);
- }
- }
-
- // Convert Y data to log scale if needed.
- // Also, expand the Y range to compress the mini plot a little.
- var extraPercent = 0.25;
- if (logscale) {
- yMax = Dygraph.log10(yMax);
- yMax += yMax*extraPercent;
- yMin = Dygraph.log10(yMin);
- for (i = 0; i < combinedSeries.length; i++) {
- combinedSeries[i][1] = Dygraph.log10(combinedSeries[i][1]);
- }
- } else {
- var yExtra;
- var yRange = yMax - yMin;
- if (yRange <= Number.MIN_VALUE) {
- yExtra = yMax*extraPercent;
- } else {
- yExtra = yRange*extraPercent;
- }
- yMax += yExtra;
- yMin -= yExtra;
- }
-
- return {data: combinedSeries, yMin: yMin, yMax: yMax};
-};
-
-/**
- * @private
- * Places the zoom handles in the proper position based on the current X data window.
- */
-DygraphRangeSelector.prototype.placeZoomHandles_ = function() {
- var xExtremes = this.dygraph_.xAxisExtremes();
- var xWindowLimits = this.dygraph_.xAxisRange();
- var xRange = xExtremes[1] - xExtremes[0];
- var leftPercent = Math.max(0, (xWindowLimits[0] - xExtremes[0])/xRange);
- var rightPercent = Math.max(0, (xExtremes[1] - xWindowLimits[1])/xRange);
- var leftCoord = this.canvasRect_.x + this.canvasRect_.w*leftPercent;
- var rightCoord = this.canvasRect_.x + this.canvasRect_.w*(1 - rightPercent);
- var handleTop = Math.max(this.canvasRect_.y, this.canvasRect_.y + (this.canvasRect_.h - this.leftZoomHandle_.height)/2);
- var halfHandleWidth = this.leftZoomHandle_.width/2;
- this.leftZoomHandle_.style.left = (leftCoord - halfHandleWidth) + 'px';
- this.leftZoomHandle_.style.top = handleTop + 'px';
- this.rightZoomHandle_.style.left = (rightCoord - halfHandleWidth) + 'px';
- this.rightZoomHandle_.style.top = this.leftZoomHandle_.style.top;
-
- this.leftZoomHandle_.style.visibility = 'visible';
- this.rightZoomHandle_.style.visibility = 'visible';
-};
-
-/**
- * @private
- * Draws the interactive layer in the foreground canvas.
- */
-DygraphRangeSelector.prototype.drawInteractiveLayer_ = function() {
- var ctx = this.fgcanvas_ctx_;
- ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h);
- var margin = 1;
- var width = this.canvasRect_.w - margin;
- var height = this.canvasRect_.h - margin;
- var zoomHandleStatus = this.getZoomHandleStatus_();
-
- ctx.strokeStyle = 'black';
- if (!zoomHandleStatus.isZoomed) {
- ctx.beginPath();
- ctx.moveTo(margin, margin);
- ctx.lineTo(margin, height);
- ctx.lineTo(width, height);
- ctx.lineTo(width, margin);
- ctx.stroke();
- if (this.iePanOverlay_) {
- this.iePanOverlay_.style.display = 'none';
- }
- } else {
- var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x);
- var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x);
-
- ctx.fillStyle = 'rgba(240, 240, 240, 0.6)';
- ctx.fillRect(0, 0, leftHandleCanvasPos, this.canvasRect_.h);
- ctx.fillRect(rightHandleCanvasPos, 0, this.canvasRect_.w - rightHandleCanvasPos, this.canvasRect_.h);
-
- ctx.beginPath();
- ctx.moveTo(margin, margin);
- ctx.lineTo(leftHandleCanvasPos, margin);
- ctx.lineTo(leftHandleCanvasPos, height);
- ctx.lineTo(rightHandleCanvasPos, height);
- ctx.lineTo(rightHandleCanvasPos, margin);
- ctx.lineTo(width, margin);
- ctx.stroke();
-
- if (this.isUsingExcanvas_) {
- this.iePanOverlay_.style.width = (rightHandleCanvasPos - leftHandleCanvasPos) + 'px';
- this.iePanOverlay_.style.left = leftHandleCanvasPos + 'px';
- this.iePanOverlay_.style.height = height + 'px';
- this.iePanOverlay_.style.display = 'inline';
- }
- }
-};
-
-/**
- * @private
- * Returns the current zoom handle position information.
- * @return {Object} The zoom handle status.
- */
-DygraphRangeSelector.prototype.getZoomHandleStatus_ = function() {
- var halfHandleWidth = this.leftZoomHandle_.width/2;
- var leftHandlePos = parseInt(this.leftZoomHandle_.style.left, 10) + halfHandleWidth;
- var rightHandlePos = parseInt(this.rightZoomHandle_.style.left, 10) + halfHandleWidth;
- return {
- leftHandlePos: leftHandlePos,
- rightHandlePos: rightHandlePos,
- isZoomed: (leftHandlePos - 1 > this.canvasRect_.x || rightHandlePos + 1 < this.canvasRect_.x+this.canvasRect_.w)
- };
-};
projects / dygraphs.git / blobdiff