};
/**
+ * Converts page the x-coordinate of the event to pixel x-coordinates on the
+ * canvas (i.e. DOM Coords).
+ * @param {!Event} e Drag event.
+ * @param {!DygraphInteractionContext} context Interaction context object.
+ * @return {number} The amount by which the drag has moved to the right.
+ */
+Dygraph.dragGetX_ = function(e, context) {
+ return Dygraph.pageX(e) - context.px;
+};
+
+/**
+ * Converts page the y-coordinate of the event to pixel y-coordinates on the
+ * canvas (i.e. DOM Coords).
+ * @param {!Event} e Drag event.
+ * @param {!DygraphInteractionContext} context Interaction context object.
+ * @return {number} The amount by which the drag has moved down.
+ */
+Dygraph.dragGetY_ = function(e, context) {
+ return Dygraph.pageY(e) - context.py;
+};
+
+/**
* This returns true unless the parameter is 0, null, undefined or NaN.
* TODO(danvk): rename this function to something like 'isNonZeroNan'.
*
};
/**
- * @param { {x:?number,y:?number,yval:?number} } p The point to consider, valid
+ * @param {{x:?number,y:?number,yval:?number}} p The point to consider, valid
* points are {x, y} objects
- * @param { boolean } allowNaNY Treat point with y=NaN as valid
- * @return { boolean } Whether the point has numeric x and y.
+ * @param {boolean=} opt_allowNaNY Treat point with y=NaN as valid
+ * @return {boolean} Whether the point has numeric x and y.
* @private
*/
-Dygraph.isValidPoint = function(p, allowNaNY) {
+Dygraph.isValidPoint = function(p, opt_allowNaNY) {
if (!p) return false; // null or undefined object
if (p.yval === null) return false; // missing point
if (p.x === null || p.x === undefined) return false;
if (p.y === null || p.y === undefined) return false;
- if (isNaN(p.x) || (!allowNaNY && isNaN(p.y))) return false;
+ if (isNaN(p.x) || (!opt_allowNaNY && isNaN(p.y))) return false;
return true;
};
};
/**
+ * Date accessors to get the parts of a calendar date (year, month,
+ * day, hour, minute, second and millisecond) according to local time,
+ * and factory method to call the Date constructor with an array of arguments.
+ */
+Dygraph.DateAccessorsLocal = {
+ getFullYear: function(d) {return d.getFullYear();},
+ getMonth: function(d) {return d.getMonth();},
+ getDate: function(d) {return d.getDate();},
+ getHours: function(d) {return d.getHours();},
+ getMinutes: function(d) {return d.getMinutes();},
+ getSeconds: function(d) {return d.getSeconds();},
+ getMilliseconds: function(d) {return d.getMilliseconds();},
+ getDay: function(d) {return d.getDay();},
+ makeDate: function(y, m, d, hh, mm, ss, ms) {
+ return new Date(y, m, d, hh, mm, ss, ms);
+ }
+};
+
+/**
+ * Date accessors to get the parts of a calendar date (year, month,
+ * day of month, hour, minute, second and millisecond) according to UTC time,
+ * and factory method to call the Date constructor with an array of arguments.
+ */
+Dygraph.DateAccessorsUTC = {
+ getFullYear: function(d) {return d.getUTCFullYear();},
+ getMonth: function(d) {return d.getUTCMonth();},
+ getDate: function(d) {return d.getUTCDate();},
+ getHours: function(d) {return d.getUTCHours();},
+ getMinutes: function(d) {return d.getUTCMinutes();},
+ getSeconds: function(d) {return d.getUTCSeconds();},
+ getMilliseconds: function(d) {return d.getUTCMilliseconds();},
+ getDay: function(d) {return d.getUTCDay();},
+ makeDate: function(y, m, d, hh, mm, ss, ms) {
+ return new Date(Date.UTC(y, m, d, hh, mm, ss, ms));
+ }
+};
+
+/**
* Return a string version of the hours, minutes and seconds portion of a date.
- *
- * @param {number} date The JavaScript date (ms since epoch)
- * @return {string} A time of the form "HH:MM:SS"
+ * @param {number} hh The hours (from 0-23)
+ * @param {number} mm The minutes (from 0-59)
+ * @param {number} ss The seconds (from 0-59)
+ * @return {string} A time of the form "HH:MM" or "HH:MM:SS"
* @private
*/
-Dygraph.hmsString_ = function(date) {
+Dygraph.hmsString_ = function(hh, mm, ss) {
var zeropad = Dygraph.zeropad;
- var d = new Date(date);
- if (d.getSeconds()) {
- return zeropad(d.getHours()) + ":" +
- zeropad(d.getMinutes()) + ":" +
- zeropad(d.getSeconds());
- } else {
- return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes());
+ var ret = zeropad(hh) + ":" + zeropad(mm);
+ if (ss) {
+ ret += ":" + zeropad(ss);
}
+ return ret;
};
/**
- * Convert a JS date (millis since epoch) to YYYY/MM/DD
- * @param {number} date The JavaScript date (ms since epoch)
- * @return {string} A date of the form "YYYY/MM/DD"
+ * Convert a JS date (millis since epoch) to a formatted string.
+ * @param {number} time The JavaScript time value (ms since epoch)
+ * @param {boolean} utc Wether output UTC or local time
+ * @return {string} A date of one of these forms:
+ * "YYYY/MM/DD", "YYYY/MM/DD HH:MM" or "YYYY/MM/DD HH:MM:SS"
* @private
*/
-Dygraph.dateString_ = function(date) {
+Dygraph.dateString_ = function(time, utc) {
var zeropad = Dygraph.zeropad;
- var d = new Date(date);
-
- // Get the year:
- var year = "" + d.getFullYear();
+ var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal;
+ var date = new Date(time);
+ var y = accessors.getFullYear(date);
+ var m = accessors.getMonth(date);
+ var d = accessors.getDate(date);
+ var hh = accessors.getHours(date);
+ var mm = accessors.getMinutes(date);
+ var ss = accessors.getSeconds(date);
+ // Get a year string:
+ var year = "" + y;
// Get a 0 padded month string
- var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh
+ var month = zeropad(m + 1); //months are 0-offset, sigh
// Get a 0 padded day string
- var day = zeropad(d.getDate());
-
- var ret = "";
- var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds();
- if (frac) ret = " " + Dygraph.hmsString_(date);
-
- return year + "/" + month + "/" + day + ret;
+ var day = zeropad(d);
+ var frac = hh * 3600 + mm * 60 + ss;
+ var ret = year + "/" + month + "/" + day;
+ if (frac) {
+ ret += " " + Dygraph.hmsString_(hh, mm, ss);
+ }
+ return ret;
};
/**
};
/**
- * @param {Object} o
+ * @param {*} o
* @return {boolean}
* @private
*/
};
/**
+ * Returns the context's pixel ratio, which is the ratio between the device
+ * pixel ratio and the backing store ratio. Typically this is 1 for conventional
+ * displays, and > 1 for HiDPI displays (such as the Retina MBP).
+ * See http://www.html5rocks.com/en/tutorials/canvas/hidpi/ for more details.
+ *
+ * @param {!CanvasRenderingContext2D} context The canvas's 2d context.
+ * @return {number} The ratio of the device pixel ratio and the backing store
+ * ratio for the specified context.
+ */
+Dygraph.getContextPixelRatio = function(context) {
+ try {
+ var devicePixelRatio = window.devicePixelRatio || 1,
+ backingStoreRatio = context.webkitBackingStorePixelRatio ||
+ context.mozBackingStorePixelRatio ||
+ context.msBackingStorePixelRatio ||
+ context.oBackingStorePixelRatio ||
+ context.backingStorePixelRatio || 1;
+ return devicePixelRatio / backingStoreRatio;
+ } catch (e) {
+ return 1;
+ }
+};
+
+/**
* Checks whether the user is on an Android browser.
* Android does not fully support the <canvas> tag, e.g. w/r/t/ clipping.
* @return {boolean}
var iframes = document.getElementsByTagName("iframe");
for (var i = 0; i < iframes.length; i++) {
var iframe = iframes[i];
- var x = Dygraph.findPosX(iframe),
- y = Dygraph.findPosY(iframe),
+ var pos = Dygraph.findPos(iframe),
+ x = pos.x,
+ y = pos.y,
width = iframe.offsetWidth,
height = iframe.offsetHeight;
return Math.pow(base, exp);
};
-// For Dygraph.setDateSameTZ, below.
-Dygraph.dateSetters = {
- ms: Date.prototype.setMilliseconds,
- s: Date.prototype.setSeconds,
- m: Date.prototype.setMinutes,
- h: Date.prototype.setHours
-};
-
-/**
- * This is like calling d.setSeconds(), d.setMinutes(), etc, except that it
- * adjusts for time zone changes to keep the date/time parts consistent.
- *
- * For example, d.getSeconds(), d.getMinutes() and d.getHours() will all be
- * the same before/after you call setDateSameTZ(d, {ms: 0}). The same is not
- * true if you call d.setMilliseconds(0).
- *
- * @type {function(!Date, Object.<number>)}
- */
-Dygraph.setDateSameTZ = function(d, parts) {
- var tz = d.getTimezoneOffset();
- for (var k in parts) {
- if (!parts.hasOwnProperty(k)) continue;
- var setter = Dygraph.dateSetters[k];
- if (!setter) throw "Invalid setter: " + k;
- setter.call(d, parts[k]);
- if (d.getTimezoneOffset() != tz) {
- d.setTime(d.getTime() + (tz - d.getTimezoneOffset()) * 60 * 1000);
- }
- }
-};
-
/**
* Converts any valid CSS color (hex, rgb(), named color) to an RGB tuple.
*
div.style.backgroundColor = colorStr;
div.style.visibility = 'hidden';
document.body.appendChild(div);
- var rgbStr = window.getComputedStyle(div).backgroundColor;
+ var rgbStr = window.getComputedStyle(div, null).backgroundColor;
document.body.removeChild(div);
var bits = /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/.exec(rgbStr);
return {
b: parseInt(bits[3], 10)
};
};
+
+/**
+ * Checks whether the browser supports the <canvas> tag.
+ * @param {HTMLCanvasElement=} opt_canvasElement Pass a canvas element as an
+ * optimization if you have one.
+ * @return {boolean} Whether the browser supports canvas.
+ */
+Dygraph.isCanvasSupported = function(opt_canvasElement) {
+ var canvas;
+ try {
+ canvas = opt_canvasElement || document.createElement("canvas");
+ canvas.getContext("2d");
+ }
+ catch (e) {
+ var ie = navigator.appVersion.match(/MSIE (\d\.\d)/);
+ var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
+ if ((!ie) || (ie[1] < 6) || (opera))
+ return false;
+ return true;
+ }
+ return true;
+};
+
+/**
+ * Parses the value as a floating point number. This is like the parseFloat()
+ * built-in, but with a few differences:
+ * - the empty string is parsed as null, rather than NaN.
+ * - if the string cannot be parsed at all, an error is logged.
+ * If the string can't be parsed, this method returns null.
+ * @param {string} x The string to be parsed
+ * @param {number=} opt_line_no The line number from which the string comes.
+ * @param {string=} opt_line The text of the line from which the string comes.
+ */
+Dygraph.parseFloat_ = function(x, opt_line_no, opt_line) {
+ var val = parseFloat(x);
+ if (!isNaN(val)) return val;
+
+ // Try to figure out what happeend.
+ // If the value is the empty string, parse it as null.
+ if (/^ *$/.test(x)) return null;
+
+ // If it was actually "NaN", return it as NaN.
+ if (/^ *nan *$/i.test(x)) return NaN;
+
+ // Looks like a parsing error.
+ var msg = "Unable to parse '" + x + "' as a number";
+ if (opt_line !== undefined && opt_line_no !== undefined) {
+ msg += " on line " + (1+(opt_line_no||0)) + " ('" + opt_line + "') of CSV.";
+ }
+ Dygraph.error(msg);
+
+ return null;
+};
projects / dygraphs.git / blobdiff