* search) and generic DOM-manipulation functions.
*/
-/*jshint globalstrict: true */
-/*global Dygraph:false, G_vmlCanvasManager:false, Node:false */
+(function() {
+
+/*global Dygraph:false, Node:false */
"use strict";
Dygraph.LOG_SCALE = 10;
};
/**
- * Add an event handler. This smooths a difference between IE and the rest of
- * the world.
+ * Add an event handler.
* @param {!Node} elem The element to add the event to.
* @param {string} type The type of the event, e.g. 'click' or 'mousemove'.
* @param {function(Event):(boolean|undefined)} fn The function to call
* @private
*/
Dygraph.addEvent = function addEvent(elem, type, fn) {
- if (elem.addEventListener) {
- elem.addEventListener(type, fn, false);
- } else {
- elem[type+fn] = function(){fn(window.event);};
- elem.attachEvent('on'+type, elem[type+fn]);
- }
+ elem.addEventListener(type, fn, false);
};
/**
};
/**
- * Remove an event handler. This smooths a difference between IE and the rest
- * of the world.
+ * Remove an event handler.
* @param {!Node} elem The element to remove the event from.
* @param {string} type The type of the event, e.g. 'click' or 'mousemove'.
* @param {function(Event):(boolean|undefined)} fn The function to call
* @private
*/
Dygraph.removeEvent = function(elem, type, fn) {
- if (elem.removeEventListener) {
- elem.removeEventListener(type, fn, false);
- } else {
- try {
- elem.detachEvent('on'+type, elem[type+fn]);
- } catch(e) {
- // We only detach event listeners on a "best effort" basis in IE. See:
- // http://stackoverflow.com/questions/2553632/detachevent-not-working-with-named-inline-functions
- }
- elem[type+fn] = null;
- }
+ elem.removeEventListener(type, fn, false);
};
Dygraph.prototype.removeTrackedEvents_ = function() {
if (obj.offsetParent) {
var copyObj = obj;
while (1) {
- // NOTE: the if statement here is for IE8.
var borderLeft = "0", borderTop = "0";
- if (window.getComputedStyle) {
- var computedStyle = window.getComputedStyle(copyObj, null);
- borderLeft = computedStyle.borderLeft || "0";
- borderTop = computedStyle.borderTop || "0";
- }
+ var computedStyle = window.getComputedStyle(copyObj, null);
+ borderLeft = computedStyle.borderLeft || "0";
+ borderTop = computedStyle.borderTop || "0";
curleft += parseInt(borderLeft, 10) ;
curtop += parseInt(borderTop, 10) ;
curleft += copyObj.offsetLeft;
};
/**
- * Create a new canvas element. This is more complex than a simple
- * document.createElement("canvas") because of IE and excanvas.
+ * Create a new canvas element.
*
* @return {!HTMLCanvasElement}
* @private
*/
Dygraph.createCanvas = function() {
- var canvas = document.createElement("canvas");
-
- var isIE = (/MSIE/.test(navigator.userAgent) && !window.opera);
- if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) {
- canvas = G_vmlCanvasManager.initElement(
- /**@type{!HTMLCanvasElement}*/(canvas));
- }
-
- return canvas;
+ return document.createElement('canvas');
};
/**
context.mozBackingStorePixelRatio ||
context.msBackingStorePixelRatio ||
context.oBackingStorePixelRatio ||
- context.backingStorePixelRatio;
- if (devicePixelRatio !== undefined &&
- backingStorePixelRatio !== undefined) {
+ context.backingStorePixelRatio || 1;
+ if (devicePixelRatio !== undefined) {
return devicePixelRatio / backingStoreRatio;
} else {
- // If either value is undefined, the ratio is meaningless so we want to
- // return 1.
+ // At least devicePixelRatio must be defined for this ratio to make sense.
+ // We default backingStoreRatio to 1: this does not exist on some browsers
+ // (i.e. desktop Chrome).
return 1;
}
} catch (e) {
})();
};
+// A whitelist of options that do not change pixel positions.
+var pixelSafeOptions = {
+ 'annotationClickHandler': true,
+ 'annotationDblClickHandler': true,
+ 'annotationMouseOutHandler': true,
+ 'annotationMouseOverHandler': true,
+ 'axisLabelColor': true,
+ 'axisLineColor': true,
+ 'axisLineWidth': true,
+ 'clickCallback': true,
+ 'drawCallback': true,
+ 'drawHighlightPointCallback': true,
+ 'drawPoints': true,
+ 'drawPointCallback': true,
+ 'drawGrid': true,
+ 'fillAlpha': true,
+ 'gridLineColor': true,
+ 'gridLineWidth': true,
+ 'hideOverlayOnMouseOut': true,
+ 'highlightCallback': true,
+ 'highlightCircleSize': true,
+ 'interactionModel': true,
+ 'isZoomedIgnoreProgrammaticZoom': true,
+ 'labelsDiv': true,
+ 'labelsDivStyles': true,
+ 'labelsDivWidth': true,
+ 'labelsKMB': true,
+ 'labelsKMG2': true,
+ 'labelsSeparateLines': true,
+ 'labelsShowZeroValues': true,
+ 'legend': true,
+ 'panEdgeFraction': true,
+ 'pixelsPerYLabel': true,
+ 'pointClickCallback': true,
+ 'pointSize': true,
+ 'rangeSelectorPlotFillColor': true,
+ 'rangeSelectorPlotStrokeColor': true,
+ 'showLabelsOnHighlight': true,
+ 'showRoller': true,
+ 'strokeWidth': true,
+ 'underlayCallback': true,
+ 'unhighlightCallback': true,
+ 'zoomCallback': true
+};
+
/**
* This function will scan the option list and determine if they
* require us to recalculate the pixel positions of each point.
+ * TODO: move this into dygraph-options.js
* @param {!Array.<string>} labels a list of options to check.
* @param {!Object} attrs
* @return {boolean} true if the graph needs new points else false.
* @private
*/
Dygraph.isPixelChangingOptionList = function(labels, attrs) {
- // A whitelist of options that do not change pixel positions.
- var pixelSafeOptions = {
- 'annotationClickHandler': true,
- 'annotationDblClickHandler': true,
- 'annotationMouseOutHandler': true,
- 'annotationMouseOverHandler': true,
- 'axisLabelColor': true,
- 'axisLineColor': true,
- 'axisLineWidth': true,
- 'clickCallback': true,
- 'digitsAfterDecimal': true,
- 'drawCallback': true,
- 'drawHighlightPointCallback': true,
- 'drawPoints': true,
- 'drawPointCallback': true,
- 'drawXGrid': true,
- 'drawYGrid': true,
- 'fillAlpha': true,
- 'gridLineColor': true,
- 'gridLineWidth': true,
- 'hideOverlayOnMouseOut': true,
- 'highlightCallback': true,
- 'highlightCircleSize': true,
- 'interactionModel': true,
- 'isZoomedIgnoreProgrammaticZoom': true,
- 'labelsDiv': true,
- 'labelsDivStyles': true,
- 'labelsDivWidth': true,
- 'labelsKMB': true,
- 'labelsKMG2': true,
- 'labelsSeparateLines': true,
- 'labelsShowZeroValues': true,
- 'legend': true,
- 'maxNumberWidth': true,
- 'panEdgeFraction': true,
- 'pixelsPerYLabel': true,
- 'pointClickCallback': true,
- 'pointSize': true,
- 'rangeSelectorPlotFillColor': true,
- 'rangeSelectorPlotStrokeColor': true,
- 'showLabelsOnHighlight': true,
- 'showRoller': true,
- 'sigFigs': true,
- 'strokeWidth': true,
- 'underlayCallback': true,
- 'unhighlightCallback': true,
- 'xAxisLabelFormatter': true,
- 'xTicker': true,
- 'xValueFormatter': true,
- 'yAxisLabelFormatter': true,
- 'yValueFormatter': true,
- 'zoomCallback': true
- };
-
// Assume that we do not require new points.
// This will change to true if we actually do need new points.
- var requiresNewPoints = false;
// Create a dictionary of series names for faster lookup.
// If there are no labels, then the dictionary stays empty.
}
}
+ // Scan through a flat (i.e. non-nested) object of options.
+ // Returns true/false depending on whether new points are needed.
+ var scanFlatOptions = function(options) {
+ for (var property in options) {
+ if (options.hasOwnProperty(property) &&
+ !pixelSafeOptions[property]) {
+ return true;
+ }
+ }
+ return false;
+ };
+
// Iterate through the list of updated options.
for (var property in attrs) {
- // Break early if we already know we need new points from a previous option.
- if (requiresNewPoints) {
- break;
- }
- if (attrs.hasOwnProperty(property)) {
- // Find out of this field is actually a series specific options list.
- if (seriesNamesDictionary[property]) {
- // This property value is a list of options for this series.
- // If any of these sub properties are not pixel safe, set the flag.
- for (var subProperty in attrs[property]) {
- // Break early if we already know we need new points from a previous option.
- if (requiresNewPoints) {
- break;
- }
- if (attrs[property].hasOwnProperty(subProperty) && !pixelSafeOptions[subProperty]) {
- requiresNewPoints = true;
- }
+ if (!attrs.hasOwnProperty(property)) continue;
+
+ // Find out of this field is actually a series specific options list.
+ if (property == 'highlightSeriesOpts' ||
+ (seriesNamesDictionary[property] && !attrs.series)) {
+ // This property value is a list of options for this series.
+ if (scanFlatOptions(attrs[property])) return true;
+ } else if (property == 'series' || property == 'axes') {
+ // This is twice-nested options list.
+ var perSeries = attrs[property];
+ for (var series in perSeries) {
+ if (perSeries.hasOwnProperty(series) &&
+ scanFlatOptions(perSeries[series])) {
+ return true;
}
- // If this was not a series specific option list, check if its a pixel changing property.
- } else if (!pixelSafeOptions[property]) {
- requiresNewPoints = true;
}
+ } else {
+ // If this was not a series specific option list, check if it's a pixel
+ // changing property.
+ if (!pixelSafeOptions[property]) return true;
}
}
- return requiresNewPoints;
+ return false;
};
Dygraph.Circles = {
* @return {boolean} Whether the browser supports canvas.
*/
Dygraph.isCanvasSupported = function(opt_canvasElement) {
- var canvas;
try {
- canvas = opt_canvasElement || document.createElement("canvas");
+ var canvas = opt_canvasElement || document.createElement("canvas");
canvas.getContext("2d");
- }
- catch (e) {
- var ie = navigator.appVersion.match(/MSIE (\d\.\d)/);
- var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
- if ((!ie) || (ie[1] < 6) || (opera))
- return false;
- return true;
+ } catch (e) {
+ return false;
}
return true;
};
return null;
};
+
+})();
projects / dygraphs.git / blobdiff