ChartBase.js revision f6b84101fdc31536da3815e81c6aa218a5057256
/**
* The ChartBase class is an abstract class used to create charts.
*
* @module charts
* @class ChartBase
* @constructor
*/
function ChartBase() {}
ChartBase.ATTRS = {
/**
* Reference to the default tooltip available for the chart.
* <p>Contains the following properties:</p>
* <dl>
* <dt>node</dt><dd>Reference to the actual dom node</dd>
* <dt>showEvent</dt><dd>Event that should trigger the tooltip</dd>
* <dt>hideEvent</dt><dd>Event that should trigger the removal of a tooltip (can be an event or an array of events)</dd>
* <dt>styles</dt><dd>A hash of style properties that will be applied to the tooltip node</dd>
* <dt>show</dt><dd>Indicates whether or not to show the tooltip</dd>
* <dt>markerEventHandler</dt><dd>Displays and hides tooltip based on marker events</dd>
* <dt>planarEventHandler</dt><dd>Displays and hides tooltip based on planar events</dd>
* <dt>markerLabelFunction</dt><dd>Reference to the function used to format a marker event triggered tooltip's text</dd>
* <dt>planarLabelFunction</dt><dd>Reference to the function used to format a planar event triggered tooltip's text</dd>
* </dl>
* @attribute tooltip
* @type Object
*/
tooltip: {
valueFn: "_getTooltip",
setter: function(val)
{
return this._updateTooltip(val);
}
},
/**
* The key value used for the chart's category axis.
*
* @attribute categoryKey
* @type String
* @default category
*/
categoryKey: {
value: "category"
},
/**
* Indicates the type of axis to use for the category axis.
*
* <dl>
* <dt>category</dt><dd>Specifies a `CategoryAxis`.</dd>
* <dt>time</dt><dd>Specifies a `TimeAxis</dd>
* </dl>
*
* @attribute categoryType
* @type String
* @default category
*/
categoryType:{
value:"category"
},
/**
* Indicates the the type of interactions that will fire events.
*
* <dl>
* <dt>marker</dt><dd>Events will be broadcasted when the mouse interacts with individual markers.</dd>
* <dt>planar</dt><dd>Events will be broadcasted when the mouse intersects the plane of any markers on the chart.</dd>
* <dt>none</dt><dd>No events will be broadcasted.</dd>
* </dl>
*
* @attribute interactionType
* @type String
* @default marker
*/
interactionType: {
value: "marker"
},
/**
* Data used to generate the chart.
*
* @attribute dataProvider
* @type Array
*/
dataProvider: {
setter: function(val)
{
return this._setDataValues(val);
}
},
/**
* A collection of keys that map to the series axes. If no keys are set,
* they will be generated automatically depending on the data structure passed into
* the chart.
*
* @attribute seriesKeys
* @type Array
*/
seriesKeys: {},
/**
* Reference to all the axes in the chart.
*
* @attribute axesCollection
* @type Array
*/
axesCollection: {},
/**
* Reference to graph instance.
*
* @attribute graph
* @type Graph
*/
graph: {
valueFn: "_getGraph"
}
};
ChartBase.prototype = {
/**
* Default value function for the `Graph` attribute.
*
* @method _getGraph
* @return Graph
* @private
*/
_getGraph: function()
{
var graph = new Y.Graph({chart:this});
graph.after("chartRendered", Y.bind(function(e) {
this.fire("chartRendered");
}, this));
return graph;
},
/**
* Returns a series instance by index or key value.
*
* @method getSeries
* @param val
* @return CartesianSeries
*/
getSeries: function(val)
{
var series = null,
graph = this.get("graph");
if(graph)
{
if(Y_Lang.isNumber(val))
{
series = graph.getSeriesByIndex(val);
}
else
{
series = graph.getSeriesByKey(val);
}
}
return series;
},
/**
* Returns an `Axis` instance by key reference. If the axis was explicitly set through the `axes` attribute,
* the key will be the same as the key used in the `axes` object. For default axes, the key for
* the category axis is the value of the `categoryKey` (`category`). For the value axis, the default
* key is `values`.
*
* @method getAxisByKey
* @param {String} val Key reference used to look up the axis.
* @return Axis
*/
getAxisByKey: function(val)
{
var axis,
axes = this.get("axes");
if(axes && axes.hasOwnProperty(val))
{
axis = axes[val];
}
return axis;
},
/**
* Returns the category axis for the chart.
*
* @method getCategoryAxis
* @return Axis
*/
getCategoryAxis: function()
{
var axis,
key = this.get("categoryKey"),
axes = this.get("axes");
if(axes.hasOwnProperty(key))
{
axis = axes[key];
}
return axis;
},
/**
* Default direction of the chart.
*
* @property _direction
* @type String
* @default horizontal
* @private
*/
_direction: "horizontal",
/**
* Storage for the `dataProvider` attribute.
*
* @property _dataProvider
* @type Array
* @private
*/
_dataProvider: null,
/**
* Setter method for `dataProvider` attribute.
*
* @method _setDataValues
* @param {Array} val Array to be set as `dataProvider`.
* @return Array
* @private
*/
_setDataValues: function(val)
{
if(Y_Lang.isArray(val[0]))
{
var hash,
dp = [],
cats = val[0],
i = 0,
l = cats.length,
n,
sl = val.length;
for(; i < l; ++i)
{
hash = {category:cats[i]};
for(n = 1; n < sl; ++n)
{
hash["series" + n] = val[n][i];
}
dp[i] = hash;
}
return dp;
}
return val;
},
/**
* Storage for `seriesCollection` attribute.
*
* @property _seriesCollection
* @type Array
* @private
*/
_seriesCollection: null,
/**
* Setter method for `seriesCollection` attribute.
*
* @property _setSeriesCollection
* @param {Array} val Array of either `CartesianSeries` instances or objects containing series attribute key value pairs.
* @private
*/
_setSeriesCollection: function(val)
{
this._seriesCollection = val;
},
/**
* Helper method that returns the axis class that a key references.
*
* @method _getAxisClass
* @param {String} t The type of axis.
* @return Axis
* @private
*/
_getAxisClass: function(t)
{
return this._axisClass[t];
},
/**
* Key value pairs of axis types.
*
* @property _axisClass
* @type Object
* @private
*/
_axisClass: {
stacked: Y.StackedAxis,
numeric: Y.NumericAxis,
category: Y.CategoryAxis,
time: Y.TimeAxis
},
/**
* Collection of axes.
*
* @property _axes
* @type Array
* @private
*/
_axes: null,
/**
* @method initializer
* @private
*/
initializer: function()
{
this._axesRenderQueue = [];
this.after("dataProviderChange", this._dataProviderChangeHandler);
},
/**
* @method renderUI
* @private
*/
renderUI: function()
{
var tt = this.get("tooltip");
//move the position = absolute logic to a class file
this.get("boundingBox").setStyle("position", "absolute");
this.get("contentBox").setStyle("position", "absolute");
this._addAxes();
this._addSeries();
if(tt && tt.show)
{
this._addTooltip();
}
this._redraw();
},
/**
* @property bindUI
* @private
*/
bindUI: function()
{
this.after("tooltipChange", Y.bind(this._tooltipChangeHandler, this));
this.after("widthChange", this._sizeChanged);
this.after("heightChange", this._sizeChanged);
var tt = this.get("tooltip"),
hideEvent = "mouseout",
showEvent = "mouseover",
cb = this.get("contentBox"),
interactionType = this.get("interactionType"),
i = 0,
len,
markerClassName = "." + SERIES_MARKER;
if(interactionType == "marker")
{
hideEvent = tt.hideEvent;
showEvent = tt.showEvent;
Y.delegate("mouseenter", Y.bind(this._markerEventDispatcher, this), cb, markerClassName);
Y.delegate("mousedown", Y.bind(this._markerEventDispatcher, this), cb, markerClassName);
Y.delegate("mouseup", Y.bind(this._markerEventDispatcher, this), cb, markerClassName);
Y.delegate("mouseleave", Y.bind(this._markerEventDispatcher, this), cb, markerClassName);
Y.delegate("click", Y.bind(this._markerEventDispatcher, this), cb, markerClassName);
Y.delegate("mousemove", Y.bind(this._positionTooltip, this), cb, markerClassName);
}
else if(interactionType == "planar")
{
this._overlay.on("mousemove", Y.bind(this._planarEventDispatcher, this));
this.on("mouseout", this.hideTooltip);
}
if(tt)
{
if(hideEvent && showEvent && hideEvent == showEvent)
{
this.on(interactionType + "Event:" + hideEvent, this.toggleTooltip);
}
else
{
if(showEvent)
{
this.on(interactionType + "Event:" + showEvent, tt[interactionType + "EventHandler"]);
}
if(hideEvent)
{
if(Y_Lang.isArray(hideEvent))
{
len = hideEvent.length;
for(; i < len; ++i)
{
this.on(interactionType + "Event:" + hideEvent[i], this.hideTooltip);
}
}
this.on(interactionType + "Event:" + hideEvent, this.hideTooltip);
}
}
}
},
/**
* Event handler for marker events.
*
* @method _markerEventDispatcher
* @param {Object} e Event object.
* @private
*/
_markerEventDispatcher: function(e)
{
var type = e.type,
cb = this.get("contentBox"),
markerNode = e.currentTarget,
strArr = markerNode.getAttribute("id").split("_"),
index = strArr.pop(),
seriesIndex = strArr.pop(),
series = this.getSeries(parseInt(seriesIndex, 10)),
items = this.getSeriesItems(series, index),
pageX = e.pageX,
pageY = e.pageY,
x = pageX - cb.getX(),
y = pageY - cb.getY();
if(type == "mouseenter")
{
type = "mouseover";
}
else if(type == "mouseleave")
{
type = "mouseout";
}
series.updateMarkerState(type, index);
e.halt();
/**
* Broadcasts when `interactionType` is set to `marker` and a series marker has received a mouseover event.
*
*
* @event markerEvent:mouseover
* @preventable false
* @param {EventFacade} e Event facade with the following additional
* properties:
* <dl>
* <dt>categoryItem</dt><dd>Hash containing information about the category `Axis`.</dd>
* <dt>valueItem</dt><dd>Hash containing information about the value `Axis`.</dd>
* <dt>node</dt><dd>The dom node of the marker.</dd>
* <dt>x</dt><dd>The x-coordinate of the mouse in relation to the Chart.</dd>
* <dt>y</dt><dd>The y-coordinate of the mouse in relation to the Chart.</dd>
* <dt>series</dt><dd>Reference to the series of the marker.</dd>
* <dt>index</dt><dd>Index of the marker in the series.</dd>
* <dt>seriesIndex</dt><dd>The `order` of the marker's series.</dd>
* </dl>
*/
/**
* Broadcasts when `interactionType` is set to `marker` and a series marker has received a mouseout event.
*
* @event markerEvent:mouseout
* @preventable false
* @param {EventFacade} e Event facade with the following additional
* properties:
* <dl>
* <dt>categoryItem</dt><dd>Hash containing information about the category `Axis`.</dd>
* <dt>valueItem</dt><dd>Hash containing information about the value `Axis`.</dd>
* <dt>node</dt><dd>The dom node of the marker.</dd>
* <dt>x</dt><dd>The x-coordinate of the mouse in relation to the Chart.</dd>
* <dt>y</dt><dd>The y-coordinate of the mouse in relation to the Chart.</dd>
* <dt>series</dt><dd>Reference to the series of the marker.</dd>
* <dt>index</dt><dd>Index of the marker in the series.</dd>
* <dt>seriesIndex</dt><dd>The `order` of the marker's series.</dd>
* </dl>
*/
/**
* Broadcasts when `interactionType` is set to `marker` and a series marker has received a mousedown event.
*
* @event markerEvent:mousedown
* @preventable false
* @param {EventFacade} e Event facade with the following additional
* properties:
* <dl>
* <dt>categoryItem</dt><dd>Hash containing information about the category `Axis`.</dd>
* <dt>valueItem</dt><dd>Hash containing information about the value `Axis`.</dd>
* <dt>node</dt><dd>The dom node of the marker.</dd>
* <dt>x</dt><dd>The x-coordinate of the mouse in relation to the Chart.</dd>
* <dt>y</dt><dd>The y-coordinate of the mouse in relation to the Chart.</dd>
* <dt>series</dt><dd>Reference to the series of the marker.</dd>
* <dt>index</dt><dd>Index of the marker in the series.</dd>
* <dt>seriesIndex</dt><dd>The `order` of the marker's series.</dd>
* </dl>
*/
/**
* Broadcasts when `interactionType` is set to `marker` and a series marker has received a mouseup event.
*
* @event markerEvent:mouseup
* @preventable false
* @param {EventFacade} e Event facade with the following additional
* properties:
* <dl>
* <dt>categoryItem</dt><dd>Hash containing information about the category `Axis`.</dd>
* <dt>valueItem</dt><dd>Hash containing information about the value `Axis`.</dd>
* <dt>node</dt><dd>The dom node of the marker.</dd>
* <dt>x</dt><dd>The x-coordinate of the mouse in relation to the Chart.</dd>
* <dt>y</dt><dd>The y-coordinate of the mouse in relation to the Chart.</dd>
* <dt>series</dt><dd>Reference to the series of the marker.</dd>
* <dt>index</dt><dd>Index of the marker in the series.</dd>
* <dt>seriesIndex</dt><dd>The `order` of the marker's series.</dd>
* </dl>
*/
/**
* Broadcasts when `interactionType` is set to `marker` and a series marker has received a click event.
*
* @event markerEvent:click
* @preventable false
* @param {EventFacade} e Event facade with the following additional
* properties:
* <dl>
* <dt>categoryItem</dt><dd>Hash containing information about the category `Axis`.</dd>
* <dt>valueItem</dt><dd>Hash containing information about the value `Axis`.</dd>
* <dt>node</dt><dd>The dom node of the marker.</dd>
* <dt>x</dt><dd>The x-coordinate of the mouse in relation to the Chart.</dd>
* <dt>y</dt><dd>The y-coordinate of the mouse in relation to the Chart.</dd>
* <dt>pageX</dt><dd>The x location of the event on the page (including scroll)</dd>
* <dt>pageY</dt><dd>The y location of the event on the page (including scroll)</dd>
* <dt>series</dt><dd>Reference to the series of the marker.</dd>
* <dt>index</dt><dd>Index of the marker in the series.</dd>
* <dt>seriesIndex</dt><dd>The `order` of the marker's series.</dd>
* <dt>originEvent</dt><dd>Underlying dom event.</dd>
* </dl>
*/
this.fire("markerEvent:" + type, {
originEvent: e,
pageX:pageX,
pageY:pageY,
categoryItem:items.category,
valueItem:items.value,
node:markerNode,
x:x,
y:y,
series:series,
index:index,
seriesIndex:seriesIndex
});
},
/**
* Event handler for dataProviderChange.
*
* @method _dataProviderChangeHandler
* @param {Object} e Event object.
* @private
*/
_dataProviderChangeHandler: function(e)
{
var dataProvider = this.get("dataProvider"),
axes = this.get("axes"),
i,
axis;
if(axes)
{
for(i in axes)
{
if(axes.hasOwnProperty(i))
{
axis = axes[i];
if(axis instanceof Y.Axis)
{
axis.set("dataProvider", dataProvider);
}
}
}
}
},
/**
* Event listener for toggling the tooltip. If a tooltip is visible, hide it. If not, it
* will create and show a tooltip based on the event object.
*
* @method toggleTooltip
* @param {Object} e Event object.
*/
toggleTooltip: function(e)
{
var tt = this.get("tooltip");
if(tt.visible)
{
this.hideTooltip();
}
else
{
tt.markerEventHandler.apply(this, [e]);
}
},
/**
* Shows a tooltip
*
* @method _showTooltip
* @param {String} msg Message to dispaly in the tooltip.
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @private
*/
_showTooltip: function(msg, x, y)
{
var tt = this.get("tooltip"),
node = tt.node;
if(msg)
{
tt.visible = true;
node.set("innerHTML", msg);
node.setStyle("top", y + "px");
node.setStyle("left", x + "px");
node.setStyle("visibility", "visible");
}
},
/**
* Positions the tooltip
*
* @method _positionTooltip
* @param {Object} e Event object.
* @private
*/
_positionTooltip: function(e)
{
var tt = this.get("tooltip"),
node = tt.node,
cb = this.get("contentBox"),
x = (e.pageX + 10) - cb.getX(),
y = (e.pageY + 10) - cb.getY();
if(node)
{
node.setStyle("left", x + "px");
node.setStyle("top", y + "px");
}
},
/**
* Hides the default tooltip
*
* @method hideTooltip
*/
hideTooltip: function()
{
var tt = this.get("tooltip"),
node = tt.node;
tt.visible = false;
node.set("innerHTML", "");
node.setStyle("left", -10000);
node.setStyle("top", -10000);
node.setStyle("visibility", "hidden");
},
/**
* Adds a tooltip to the dom.
*
* @method _addTooltip
* @private
*/
_addTooltip: function()
{
var tt = this.get("tooltip"),
id = this.get("id") + "_tooltip",
cb = this.get("contentBox"),
oldNode = DOCUMENT.getElementById(id);
if(oldNode)
{
cb.removeChild(oldNode);
}
tt.node.setAttribute("id", id);
tt.node.setStyle("visibility", "hidden");
cb.appendChild(tt.node);
},
/**
* Updates the tooltip attribute.
*
* @method _updateTooltip
* @param {Object} val Object containing properties for the tooltip.
* @return Object
* @private
*/
_updateTooltip: function(val)
{
var tt = this._tooltip,
i,
styles,
node,
props = {
markerLabelFunction:"markerLabelFunction",
planarLabelFunction:"planarLabelFunction",
showEvent:"showEvent",
hideEvent:"hideEvent",
markerEventHandler:"markerEventHandler",
planarEventHandler:"planarEventHandler",
show:"show"
};
if(Y_Lang.isObject(val))
{
styles = val.styles;
node = Y.one(val.node) || tt.node;
if(styles)
{
for(i in styles)
{
if(styles.hasOwnProperty(i))
{
node.setStyle(i, styles[i]);
}
}
}
for(i in props)
{
if(val.hasOwnProperty(i))
{
tt[i] = val[i];
}
}
tt.node = node;
}
return tt;
},
/**
* Default getter for `tooltip` attribute.
*
* @method _getTooltip
* @return Object
* @private
*/
_getTooltip: function()
{
var node = DOCUMENT.createElement("div"),
tt = {
markerLabelFunction: this._tooltipLabelFunction,
planarLabelFunction: this._planarLabelFunction,
show: true,
hideEvent: "mouseout",
showEvent: "mouseover",
markerEventHandler: function(e)
{
var tt = this.get("tooltip"),
msg = tt.markerLabelFunction.apply(this, [e.categoryItem, e.valueItem, e.index, e.series, e.seriesIndex]);
this._showTooltip(msg, e.x + 10, e.y + 10);
},
planarEventHandler: function(e)
{
var tt = this.get("tooltip"),
msg ,
categoryAxis = this.get("categoryAxis");
msg = tt.planarLabelFunction.apply(this, [categoryAxis, e.valueItem, e.index, e.items, e.seriesIndex]);
this._showTooltip(msg, e.x + 10, e.y + 10);
}
};
node.setAttribute("id", this.get("id") + "_tooltip");
node = Y.one(node);
node.setStyle("fontSize", "85%");
node.setStyle("opacity", "0.83");
node.setStyle("position", "absolute");
node.setStyle("paddingTop", "2px");
node.setStyle("paddingRight", "5px");
node.setStyle("paddingBottom", "4px");
node.setStyle("paddingLeft", "2px");
node.setStyle("backgroundColor", "#fff");
node.setStyle("border", "1px solid #dbdccc");
node.setStyle("pointerEvents", "none");
node.setStyle("zIndex", 3);
node.setStyle("whiteSpace", "noWrap");
node.setStyle("visibility", "hidden");
tt.node = Y.one(node);
this._tooltip = tt;
return tt;
},
/**
* Formats tooltip text when `interactionType` is `planar`.
*
* @method _planarLabelFunction
* @param {Axis} categoryAxis Reference to the categoryAxis of the chart.
* @param {Array} valueItems Array of objects for each series that has a data point in the coordinate plane of the event. Each object contains the following data:
* <dl>
* <dt>axis</dt><dd>The value axis of the series.</dd>
* <dt>key</dt><dd>The key for the series.</dd>
* <dt>value</dt><dd>The value for the series item.</dd>
* <dt>displayName</dt><dd>The display name of the series. (defaults to key if not provided)</dd>
* </dl>
* @param {Number} index The index of the item within its series.
* @param {Array} seriesArray Array of series instances for each value item.
* @param {Number} seriesIndex The index of the series in the `seriesCollection`.
* @private
*/
_planarLabelFunction: function(categoryAxis, valueItems, index, seriesArray, seriesIndex)
{
var msg = "",
valueItem,
i = 0,
len = seriesArray.length,
axis,
series;
if(categoryAxis)
{
msg += categoryAxis.get("labelFunction").apply(this, [categoryAxis.getKeyValueAt(this.get("categoryKey"), index), categoryAxis.get("labelFormat")]);
}
for(; i < len; ++i)
{
series = seriesArray[i];
if(series.get("visible"))
{
valueItem = valueItems[i];
axis = valueItem.axis;
msg += "<br/><span>" + valueItem.displayName + ": " + axis.get("labelFunction").apply(this, [axis.getKeyValueAt(valueItem.key, index), axis.get("labelFormat")]) + "</span>";
}
}
return msg;
},
/**
* Formats tooltip text when `interactionType` is `marker`.
*
* @method _tooltipLabelFunction
* @param {Object} categoryItem An object containing the following:
* <dl>
* <dt>axis</dt><dd>The axis to which the category is bound.</dd>
* <dt>displayName</dt><dd>The display name set to the category (defaults to key if not provided)</dd>
* <dt>key</dt><dd>The key of the category.</dd>
* <dt>value</dt><dd>The value of the category</dd>
* </dl>
* @param {Object} valueItem An object containing the following:
* <dl>
* <dt>axis</dt><dd>The axis to which the item's series is bound.</dd>
* <dt>displayName</dt><dd>The display name of the series. (defaults to key if not provided)</dd>
* <dt>key</dt><dd>The key for the series.</dd>
* <dt>value</dt><dd>The value for the series item.</dd>
* </dl>
* @param {Number} itemIndex The index of the item within the series.
* @param {CartesianSeries} series The `CartesianSeries` instance of the item.
* @param {Number} seriesIndex The index of the series in the `seriesCollection`.
* @private
*/
_tooltipLabelFunction: function(categoryItem, valueItem, itemIndex, series, seriesIndex)
{
var msg = categoryItem.displayName +
":&nbsp;" + categoryItem.axis.get("labelFunction").apply(this, [categoryItem.value, categoryItem.axis.get("labelFormat")]) +
"<br/>" + valueItem.displayName +
":&nbsp;" + valueItem.axis.get("labelFunction").apply(this, [valueItem.value, valueItem.axis.get("labelFormat")]);
return msg;
},
/**
* Event handler for the tooltipChange.
*
* @method _tooltipChangeHandler
* @param {Object} e Event object.
* @private
*/
_tooltipChangeHandler: function(e)
{
if(this.get("tooltip"))
{
var tt = this.get("tooltip"),
node = tt.node,
show = tt.show,
cb = this.get("contentBox");
if(node && show)
{
if(!cb.contains(node))
{
this._addTooltip();
}
}
}
}
};
Y.ChartBase = ChartBase;