/**
* @private
+ * Add an event handler. This event handler is kept until the graph is
+ * destroyed with a call to graph.destroy().
+ *
+ * @param { DOM element } elem The element to add the event to.
+ * @param { String } type The type of the event, e.g. 'click' or 'mousemove'.
+ * @param { Function } fn The function to call on the event. The function takes
+ * one parameter: the event object.
+ */
+Dygraph.prototype.addEvent = function addEvent(elem, type, fn) {
+ Dygraph.addEvent(elem, type, fn);
+ this.registeredEvents_.push({ elem : elem, type : type, fn : fn });
+};
+
+/**
+ * @private
* Remove an event handler. This smooths a difference between IE and the rest of
* the world.
* @param { DOM element } elem The element to add the event to.
};
/**
+ * @private
+ * @param { Object } 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.
+ */
+Dygraph.isValidPoint = function(p, 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;
+ return true;
+};
+
+/**
* Number formatting function which mimicks the behavior of %g in printf, i.e.
* either exponential or fixed format (without trailing 0s) is used depending on
* the length of the generated string. The advantage of this format is that
var dateStrSlashed;
var d;
- // Let the system try the format first.
- d = Dygraph.dateStrToMillis(dateStr);
- if (d && !isNaN(d)) return d;
+ // Let the system try the format first, with one caveat:
+ // YYYY-MM-DD[ HH:MM:SS] is interpreted as UTC by a variety of browsers.
+ // dygraphs displays dates in local time, so this will result in surprising
+ // inconsistencies. But if you specify "T" or "Z" (i.e. YYYY-MM-DDTHH:MM:SS),
+ // then you probably know what you're doing, so we'll let you go ahead.
+ // Issue: http://code.google.com/p/dygraphs/issues/detail?id=255
+ if (dateStr.search("-") == -1 ||
+ dateStr.search("T") != -1 || dateStr.search("Z") != -1) {
+ d = Dygraph.dateStrToMillis(dateStr);
+ if (d && !isNaN(d)) return d;
+ }
if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12'
dateStrSlashed = dateStr.replace("-", "/", "g");
'clickCallback': true,
'digitsAfterDecimal': true,
'drawCallback': true,
+ 'drawHighlightPointCallback': true,
'drawPoints': true,
+ 'drawPointCallback': true,
'drawXGrid': true,
'drawYGrid': true,
'fillAlpha': true,
}
return true;
};
+
+/**
+ * ctx: the canvas context
+ * sides: the number of sides in the shape.
+ * radius: the radius of the image.
+ * cx: center x coordate
+ * cy: center y coordinate
+ * rotationRadians: the shift of the initial angle, in radians.
+ * delta: the angle shift for each line. If missing, creates a regular
+ * polygon.
+ */
+Dygraph.regularShape_ = function(
+ ctx, sides, radius, cx, cy, rotationRadians, delta) {
+ rotationRadians = rotationRadians ? rotationRadians : 0;
+ delta = delta ? delta : Math.PI * 2 / sides;
+
+ ctx.beginPath();
+ var first = true;
+ var initialAngle = rotationRadians;
+ var angle = initialAngle;
+
+ var computeCoordinates = function() {
+ var x = cx + (Math.sin(angle) * radius);
+ var y = cy + (-Math.cos(angle) * radius);
+ return [x, y];
+ };
+
+ var initialCoordinates = computeCoordinates();
+ var x = initialCoordinates[0];
+ var y = initialCoordinates[1];
+ ctx.moveTo(x, y);
+
+ for (var idx = 0; idx < sides; idx++) {
+ angle = (idx == sides - 1) ? initialAngle : (angle + delta);
+ var coords = computeCoordinates();
+ ctx.lineTo(coords[0], coords[1]);
+ }
+ ctx.fill();
+ ctx.stroke();
+}
+
+Dygraph.shapeFunction_ = function(sides, rotationRadians, delta) {
+ return function(g, name, ctx, cx, cy, color, radius) {
+ ctx.strokeStyle = color;
+ ctx.fillStyle = "white";
+ Dygraph.regularShape_(ctx, sides, radius, cx, cy, rotationRadians, delta);
+ };
+};
+
+Dygraph.DrawPolygon_ = function(sides, rotationRadians, ctx, cx, cy, color, radius, delta) {
+ new Dygraph.RegularShape_(sides, rotationRadians, delta).draw(ctx, cx, cy, radius);
+}
+
+Dygraph.Circles = {
+ DEFAULT : function(g, name, ctx, canvasx, canvasy, color, radius) {
+ ctx.beginPath();
+ ctx.fillStyle = color;
+ ctx.arc(canvasx, canvasy, radius, 0, 2 * Math.PI, false);
+ ctx.fill();
+ },
+ TRIANGLE : Dygraph.shapeFunction_(3),
+ SQUARE : Dygraph.shapeFunction_(4, Math.PI / 4),
+ DIAMOND : Dygraph.shapeFunction_(4),
+ PENTAGON : Dygraph.shapeFunction_(5),
+ HEXAGON : Dygraph.shapeFunction_(6),
+ CIRCLE : function(g, name, ctx, cx, cy, color, radius) {
+ ctx.beginPath();
+ ctx.strokeStyle = color;
+ ctx.fillStyle = "white";
+ ctx.arc(cx, cy, radius, 0, 2 * Math.PI, false);
+ ctx.fill();
+ ctx.stroke();
+ },
+ STAR : Dygraph.shapeFunction_(5, 0, 4 * Math.PI / 5),
+ PLUS : function(g, name, ctx, cx, cy, color, radius) {
+ ctx.strokeStyle = color;
+
+ ctx.beginPath();
+ ctx.moveTo(cx + radius, cy);
+ ctx.lineTo(cx - radius, cy);
+ ctx.closePath();
+ ctx.stroke();
+
+ ctx.beginPath();
+ ctx.moveTo(cx, cy + radius);
+ ctx.lineTo(cx, cy - radius);
+ ctx.closePath();
+ ctx.stroke();
+ },
+ EX : function(g, name, ctx, cx, cy, color, radius) {
+ ctx.strokeStyle = color;
+
+ ctx.beginPath();
+ ctx.moveTo(cx + radius, cy + radius);
+ ctx.lineTo(cx - radius, cy - radius);
+ ctx.closePath();
+ ctx.stroke();
+
+ ctx.beginPath();
+ ctx.moveTo(cx + radius, cy - radius);
+ ctx.lineTo(cx - radius, cy + radius);
+ ctx.closePath();
+ ctx.stroke();
+ }
+};
projects / dygraphs.git / blobdiff