--- /dev/null
+/**
+ * @license
+ * Copyright 2012 Dan Vanderkam (danvdk@gmail.com)
+ * MIT-licensed (http://opensource.org/licenses/MIT)
+ */
+/*global Dygraph:false */
+
+Dygraph.Plugins.ChartLabels = (function() {
+
+"use strict";
+
+// TODO(danvk): move chart label options out of dygraphs and into the plugin.
+// TODO(danvk): only tear down & rebuild the DIVs when it's necessary.
+
+var chart_labels = function() {
+ this.title_div_ = null;
+ this.xlabel_div_ = null;
+ this.ylabel_div_ = null;
+ this.y2label_div_ = null;
+};
+
+chart_labels.prototype.toString = function() {
+ return "ChartLabels Plugin";
+};
+
+chart_labels.prototype.activate = function(g) {
+ return {
+ layout: this.layout,
+ // clearChart: this.clearChart,
+ didDrawChart: this.didDrawChart
+ };
+};
+
+// QUESTION: should there be a plugin-utils.js?
+var createDivInRect = function(r) {
+ var div = document.createElement('div');
+ div.style.position = 'absolute';
+ div.style.left = r.x + 'px';
+ div.style.top = r.y + 'px';
+ div.style.width = r.w + 'px';
+ div.style.height = r.h + 'px';
+ return div;
+};
+
+// Detach and null out any existing nodes.
+chart_labels.prototype.detachLabels_ = function() {
+ var els = [ this.title_div_,
+ this.xlabel_div_,
+ this.ylabel_div_,
+ this.y2label_div_ ];
+ for (var i = 0; i < els.length; i++) {
+ var el = els[i];
+ if (!el) continue;
+ if (el.parentNode) el.parentNode.removeChild(el);
+ }
+
+ this.title_div_ = null;
+ this.xlabel_div_ = null;
+ this.ylabel_div_ = null;
+ this.y2label_div_ = null;
+};
+
+var createRotatedDiv = function(g, box, axis, classes, html) {
+ // TODO(danvk): is this outer div actually necessary?
+ var div = document.createElement("div");
+ div.style.position = 'absolute';
+ if (axis == 1) {
+ // NOTE: this is cheating. Should be positioned relative to the box.
+ div.style.left = '0px';
+ } else {
+ div.style.left = box.x + 'px';
+ }
+ div.style.top = box.y + 'px';
+ div.style.width = box.w + 'px';
+ div.style.height = box.h + 'px';
+ div.style.fontSize = (g.getOption('yLabelWidth') - 2) + 'px';
+
+ var inner_div = document.createElement("div");
+ inner_div.style.position = 'absolute';
+ inner_div.style.width = box.h + 'px';
+ inner_div.style.height = box.w + 'px';
+ inner_div.style.top = (box.h / 2 - box.w / 2) + 'px';
+ inner_div.style.left = (box.w / 2 - box.h / 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.
+ var val = 'rotate(' + (axis == 1 ? '-' : '') + '90deg)';
+ inner_div.style.transform = val; // HTML5
+ inner_div.style.WebkitTransform = val; // Safari/Chrome
+ inner_div.style.MozTransform = val; // Firefox
+ inner_div.style.OTransform = val; // Opera
+ inner_div.style.msTransform = val; // IE9
+
+ var class_div = document.createElement("div");
+ class_div.className = classes;
+ class_div.innerHTML = html;
+
+ inner_div.appendChild(class_div);
+ div.appendChild(inner_div);
+ return div;
+};
+
+chart_labels.prototype.layout = function(e) {
+ this.detachLabels_();
+
+ var g = e.dygraph;
+ var div = e.chart_div;
+ if (g.getOption('title')) {
+ // QUESTION: should this return an absolutely-positioned div instead?
+ var title_rect = e.reserveSpaceTop(g.getOption('titleHeight'));
+ this.title_div_ = createDivInRect(title_rect);
+ this.title_div_.style.textAlign = 'center';
+ this.title_div_.style.fontSize = (g.getOption('titleHeight') - 8) + 'px';
+ this.title_div_.style.fontWeight = 'bold';
+ this.title_div_.style.zIndex = 10;
+
+ var class_div = document.createElement("div");
+ class_div.className = 'dygraph-label dygraph-title';
+ class_div.innerHTML = g.getOption('title');
+ this.title_div_.appendChild(class_div);
+ div.appendChild(this.title_div_);
+ }
+
+ if (g.getOption('xlabel')) {
+ var x_rect = e.reserveSpaceBottom(g.getOption('xLabelHeight'));
+ this.xlabel_div_ = createDivInRect(x_rect);
+ this.xlabel_div_.style.textAlign = 'center';
+ this.xlabel_div_.style.fontSize = (g.getOption('xLabelHeight') - 2) + 'px';
+
+ var class_div = document.createElement("div");
+ class_div.className = 'dygraph-label dygraph-xlabel';
+ class_div.innerHTML = g.getOption('xlabel');
+ this.xlabel_div_.appendChild(class_div);
+ div.appendChild(this.xlabel_div_);
+ }
+
+ if (g.getOption('ylabel')) {
+ // It would make sense to shift the chart here to make room for the y-axis
+ // label, but the default yAxisLabelWidth is large enough that this results
+ // in overly-padded charts. The y-axis label should fit fine. If it
+ // doesn't, the yAxisLabelWidth option can be increased.
+ var y_rect = e.reserveSpaceLeft(0);
+
+ this.ylabel_div_ = createRotatedDiv(
+ g, y_rect,
+ 1, // primary (left) y-axis
+ 'dygraph-label dygraph-ylabel',
+ g.getOption('ylabel'));
+ div.appendChild(this.ylabel_div_);
+ }
+
+ if (g.getOption('y2label') && g.numAxes() == 2) {
+ // same logic applies here as for ylabel.
+ var y2_rect = e.reserveSpaceRight(0);
+ this.y2label_div_ = createRotatedDiv(
+ g, y2_rect,
+ 2, // secondary (right) y-axis
+ 'dygraph-label dygraph-y2label',
+ g.getOption('y2label'));
+ div.appendChild(this.y2label_div_);
+ }
+};
+
+chart_labels.prototype.didDrawChart = function(e) {
+ var g = e.dygraph;
+ if (this.title_div_) {
+ this.title_div_.children[0].innerHTML = g.getOption('title');
+ }
+ if (this.xlabel_div_) {
+ this.xlabel_div_.children[0].innerHTML = g.getOption('xlabel');
+ }
+ if (this.ylabel_div_) {
+ this.ylabel_div_.children[0].children[0].innerHTML = g.getOption('ylabel');
+ }
+ if (this.y2label_div_) {
+ this.y2label_div_.children[0].children[0].innerHTML = g.getOption('y2label');
+ }
+};
+
+chart_labels.prototype.clearChart = function() {
+};
+
+chart_labels.prototype.destroy = function() {
+ this.detachLabels_();
+};
+
+
+return chart_labels;
+})();
projects / dygraphs.git / blobdiff