+DygraphCanvasRenderer.prototype._renderChartLabels = function() {
+ // Generate divs for the chart title, xlabel and ylabel.
+ // Space for these divs has already been taken away from the charting area in
+ // the DygraphCanvasRenderer constructor.
+ if (this.attr_('title')) {
+ var div = document.createElement("div");
+ div.style.position = 'absolute';
+ div.style.top = '0px';
+ div.style.left = this.area.x + 'px';
+ div.style.width = this.area.w + 'px';
+ div.style.height = this.attr_('titleHeight') + 'px';
+ div.style.textAlign = 'center';
+ div.style.fontSize = (this.attr_('titleHeight') - 8) + 'px';
+ div.style.fontWeight = 'bold';
+ var class_div = document.createElement("div");
+ class_div.className = 'dygraph-label dygraph-title';
+ class_div.innerHTML = this.attr_('title');
+ div.appendChild(class_div);
+ this.container.appendChild(div);
+ this.chartLabels.title = div;
+ }
+
+ if (this.attr_('xlabel')) {
+ var div = document.createElement("div");
+ div.style.position = 'absolute';
+ div.style.bottom = 0; // TODO(danvk): this is lazy. Calculate style.top.
+ div.style.left = this.area.x + 'px';
+ div.style.width = this.area.w + 'px';
+ div.style.height = this.attr_('xLabelHeight') + 'px';
+ div.style.textAlign = 'center';
+ div.style.fontSize = (this.attr_('xLabelHeight') - 2) + 'px';
+
+ var class_div = document.createElement("div");
+ class_div.className = 'dygraph-label dygraph-xlabel';
+ class_div.innerHTML = this.attr_('xlabel');
+ div.appendChild(class_div);
+ this.container.appendChild(div);
+ this.chartLabels.xlabel = div;
+ }
+
+ if (this.attr_('ylabel')) {
+ var box = {
+ left: 0,
+ top: this.area.y,
+ width: this.attr_('yLabelWidth'),
+ height: this.area.h
+ };
+ // TODO(danvk): is this outer div actually necessary?
+ var div = document.createElement("div");
+ div.style.position = 'absolute';
+ div.style.left = box.left;
+ div.style.top = box.top + 'px';
+ div.style.width = box.width + 'px';
+ div.style.height = box.height + 'px';
+ div.style.fontSize = (this.attr_('yLabelWidth') - 2) + 'px';
+
+ var inner_div = document.createElement("div");
+ inner_div.style.position = 'absolute';
+ inner_div.style.width = box.height + 'px';
+ inner_div.style.height = box.width + 'px';
+ inner_div.style.top = (box.height / 2 - box.width / 2) + 'px';
+ inner_div.style.left = (box.width / 2 - box.height / 2) + 'px';
+ inner_div.style.textAlign = 'center';
+
+ // CSS rotation is an HTML5 feature which is not standardized. Hence every
+ // browser has its own name for the CSS style.
+ inner_div.style.transform = 'rotate(-90deg)'; // HTML5
+ inner_div.style.WebkitTransform = 'rotate(-90deg)'; // Safari/Chrome
+ inner_div.style.MozTransform = 'rotate(-90deg)'; // Firefox
+ inner_div.style.OTransform = 'rotate(-90deg)'; // Opera
+ inner_div.style.msTransform = 'rotate(-90deg)'; // IE9
+
+ if (typeof(document.documentMode) !== 'undefined' &&
+ document.documentMode < 9) {
+ // We're dealing w/ an old version of IE, so we have to rotate the text
+ // using a BasicImage transform. This uses a different origin of rotation
+ // than HTML5 rotation (top left of div vs. its center).
+ inner_div.style.filter =
+ 'progid:DXImageTransform.Microsoft.BasicImage(rotation=3)';
+ inner_div.style.left = '0px';
+ inner_div.style.top = '0px';
+ }
+
+ var class_div = document.createElement("div");
+ class_div.className = 'dygraph-label dygraph-ylabel';
+ class_div.innerHTML = this.attr_('ylabel');
+
+ inner_div.appendChild(class_div);
+ div.appendChild(inner_div);
+ this.container.appendChild(div);
+ this.chartLabels.ylabel = div;
+ }
+};
+
+