Possible to have Flex dataTips on Canvas rather than Chart objects?
Flex charts, like AreaChart
, have wonderful built-in support for displaying data "tool tips" when a user hovers over a point supplied in the data of a graph. You can hover over any of the bar graph examples on this page for a demonstration.
I have a graph situation where I optionally draw in some dots as reference points on CartesianDataCanvas
es supplied to my AreaChart
through it's <mx:annotationElements>
and <mx:backgroundElements>
tags. I would like to have the same hover data-tip functionality tha开发者_Python百科t the AreaChart
has, but applied to these dots. Does anyone know how to accomplish this, or if it is even possible?
I realize that I am just drawing on canvas, and that no actual dataProvider supports these dots, but if there was a way to supply the CartesianDataCanvas
with an array of data values or something to that effect, that would be great!
Having seen your other post, I assume you are drawing dots using cdc.graphics
. In that case, it is not easy to add hover text to them. Create a class that extends UIComponent
, override the updateDisplayList
method and do the drawing inside that. Now you can easily add mouse over text using the dot.toolTip
property.
//Dot.as
package
{
public class Dot
{
override protected function updateDisplayList(unscaledWidth:Number,
unscaledHeight:Number):void
{
this.graphics.lineStyle(1);
this.graphics.drawCircle(0, 0, 5);
}
}
//... later:
var dot:Dot = new Dot();
dot.x = xValue;
dot.y = yValue;
dot.toolTip = "Hover Text";
cdc.addChild(dot);
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