add pointClickCallback

[dygraphs.git] / dygraph-canvas.js

diff --git a/dygraph-canvas.js b/dygraph-canvas.js
index 66888ee..123fa83 100644 (file)
--- a/dygraph-canvas.js
+++ b/dygraph-canvas.js
@@ -30,19 +30,25 @@ DygraphLayout.prototype.addDataset = function(setname, set_xy) {
   this.datasets[setname] = set_xy;
 };
 
-// TODO(danvk): CONTRACT remove
 DygraphLayout.prototype.setAnnotations = function(ann) {
   // The Dygraph object's annotations aren't parsed. We parse them here and
   // save a copy.
   var parse = this.attr_('xValueParser');
   for (var i = 0; i < ann.length; i++) {
     var a = {};
-    if (!ann[i].x) {
+    if (!ann[i].xval && !ann[i].x) {
       this.dygraph_.error("Annotations must have an 'x' property");
       return;
     }
+    if (ann[i].icon &&
+        !(ann[i].hasOwnProperty('iconWidth') &&
+          ann[i].hasOwnProperty('iconHeight'))) {
+      this.dygraph_.error("Must set iconWidth and iconHeight when setting " +
+                          "annotation.icon property");
+      return;
+    }
     Dygraph.update(a, ann[i]);
-    a.xval = parse(a.x);
+    if (!a.xval) a.xval = parse(a.x);
     this.annotations.push(a);
   }
 };
@@ -495,7 +501,6 @@ DygraphCanvasRenderer.prototype._renderAnnotations = function() {
     "position": "absolute",
     "fontSize": this.options.axisLabelFontSize + "px",
     "zIndex": 10,
-    "width": "20px",
     "overflow": "hidden",
   };
 
@@ -514,34 +519,68 @@ DygraphCanvasRenderer.prototype._renderAnnotations = function() {
   var points = this.layout.annotated_points;
   for (var i = 0; i < points.length; i++) {
     var p = points[i];
+    if (p.canvasx < this.area.x || p.canvasx > this.area.x + this.area.w) {
+      continue;
+    }
+
+    var a = p.annotation;
+    var tick_height = 6;
+    if (a.hasOwnProperty("tickHeight")) {
+      tick_height = a.tickHeight;
+    }
+
     var div = document.createElement("div");
     for (var name in annotationStyle) {
       if (annotationStyle.hasOwnProperty(name)) {
         div.style[name] = annotationStyle[name];
       }
     }
-    div.className = "dygraphDefaultAnnotation";
-    if (p.annotation.hasOwnProperty('cssClass')) {
-      div.className += " " + p.annotation.cssClass;
+    if (!a.hasOwnProperty('icon')) {
+      div.className = "dygraphDefaultAnnotation";
+    }
+    if (a.hasOwnProperty('cssClass')) {
+      div.className += " " + a.cssClass;
     }
-    div.appendChild(document.createTextNode(p.annotation.shortText));
-    div.style.left = (p.canvasx - 10) + "px";
-    div.style.top = p.canvasy + "px";
+
+    var width = a.hasOwnProperty('width') ? a.width : 16;
+    var height = a.hasOwnProperty('height') ? a.height : 16;
+    if (a.hasOwnProperty('icon')) {
+      var img = document.createElement("img");
+      img.src = a.icon;
+      img.width = width = a.iconWidth;
+      img.height = height = a.iconHeight;
+      div.appendChild(img);
+    } else if (p.annotation.hasOwnProperty('shortText')) {
+      div.appendChild(document.createTextNode(p.annotation.shortText));
+    }
+    div.style.left = (p.canvasx - width / 2) + "px";
+    div.style.top = (p.canvasy - height - tick_height) + "px";
+    div.style.width = width + "px";
+    div.style.height = height + "px";
     div.title = p.annotation.text;
     div.style.color = this.colors[p.name];
     div.style.borderColor = this.colors[p.name];
+    a.div = div;
 
-    var self = this;
-    Dygraph.addEvent(div, 'click', function(p, self) { return function(e) {
-      if (p.annotation.hasOwnProperty('clickHandler')) {
-        p.annotation.clickHandler(p.annotation, p, self.dygraph_, e);
-      } else if (self.dygraph_.attr_('annotationClickHandler')) {
-        self.dygraph_.attr_('annotationClickHandler')(p.annotation, p, self.dygraph_, e);
-      } }; }(p, self)
-    );
+    Dygraph.addEvent(div, 'click',
+        bindEvt('clickHandler', 'annotationClickHandler', p, this));
+    Dygraph.addEvent(div, 'mouseover',
+        bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this));
+    Dygraph.addEvent(div, 'mouseout',
+        bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this));
+    Dygraph.addEvent(div, 'dblclick',
+        bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this));
 
     this.container.appendChild(div);
     this.annotations.push(div);
+
+    var ctx = this.element.getContext("2d");
+    ctx.strokeStyle = this.colors[p.name];
+    ctx.beginPath();
+    ctx.moveTo(p.canvasx, p.canvasy);
+    ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height);
+    ctx.closePath();
+    ctx.stroke();
   }
 };