"Patch" to allow setting tooltips on plotted markers + IE fixes

[guest]

Sorry if this is not a real patch, but I hope it could be useful anyway.

The following are some modifications to Dojo Charting v 0.4.3 to uses the "applyTo" features of Plotters to add tooltips to plotted markers, and two fixes for IE to displaying them correctly.

First a variant of Chart.render() to allow passing "applyTo" parameter:

dojo.charting.Chart.prototype.applyToRender = function (kwArgs, applyTo)
{
	if (this.node.style.position != "absolute") {
		this.node.style.position = "relative";
	}
	for (var i = 0; i < this.plotAreas.length; i++) {
		var area = this.plotAreas[i].plotArea;
		var node = area.initialize();
		node.style.position = "absolute";
		node.style.top = this.plotAreas[i].top + "px";
		node.style.left = this.plotAreas[i].left + "px";
		this.node.appendChild(node);
		// *** Modified line. ***
		//area.render ();
		area.render (kwArgs, applyTo);
	}
}

Then the first fix for IE to be able to "hover" with mouse on plotted markers:

if (dojo.render.vml.capable && ! dojo.render.svg.capable)
{
	dojo.charting.Plotters._group = function (plotarea)
	{
		var group = document.createElement("div");
		// *** Commented out style. ***
		//group.style.position = "absolute";
		//group.style.top = "0px";
		//group.style.left = "0px";
		group.style.width = plotarea.size.width + "px";
		group.style.height = plotarea.size.height + "px";
		return group;
	}
}

All this allow the following (with a second fix for IE):

someChart.applyToRender (
        null,
        function (marker, data) {
                marker.setAttribute (
			"title",
			data.fieldX + ' ' + data.fieldY
		);
                marker.onclick = function () { alert ('click'); }

                // Last fix for IE, otherwise markers are under the line
                if (dojo.render.vml.capable && ! dojo.render.svg.capable)
		{
			marker.style.zIndex = 10;
		}
        }

Regards,

Daniele

[Tom Trenka]

Hi Daniele,

Thanks for the patch submissions. We're currently rewriting the charting engine for the Dojo 1.0 release, and are already building this capability into the new version using dojox.gfx--but we appreciate the submission nonetheless.

[(none)]

Milestone 0.4.4 deleted