>JS I suppose. Though it creates a DIV element on demand. The function
>in question is RGraph.Tooltip() in RGraph.common.js.
OK, I found it. Thank you for showing me. I was thinking of something
similar recently.
/**
* Shows a tooltip next to the mouse pointer
*
* @param text The tooltip text
* @return The tooltip object - a DIV
*/
RGraph.Tooltip = function (canvas, text, x, y)
{
/**
* Hide any currently shown tooltip
*/
if (RGraph.tooltip) {
RGraph.tooltip.style.display = 'none';
RGraph.tooltip = null;
}
/**
* Show a tool tip
*/
var obj = document.createElement('DIV');
obj.style.position = 'absolute'
obj.style.backgroundColor = '#FFFFE1';
obj.style.border = '1px solid #333';
obj.style.borderRight = '2px solid #333'; // Set the right and
bottom borders to be a little thicker - gives the effect of a drop
shadow
obj.style.borderBottom = '2px solid #333'; // Set the right and
bottom borders to be a little thicker - gives the effect of a drop
shadow
obj.style.display = 'block'
obj.style.visibility = 'visible';
obj.style.paddingLeft = '3px';
obj.style.paddingRight = '3px';
obj.style.fontFamily = 'Tahoma';
obj.style.fontSize = '10pt';
obj.innerHTML = text;
document.body.insertBefore(obj, canvas);
obj.style.left = (canvas.offsetLeft) + x + 3;
obj.style.top = (canvas.offsetTop + y) - obj.offsetHeight;
/**
* Install the function for hiding the tooltip.
*
* FIXME Not sure how this will affect any existing document.onclick event
*/
document.body.onclick = function ()
{
RGraph.tooltip.style.display = 'none';
}
/**
* Keep a reference to the object
*/
RGraph.tooltip = obj;
}
Now I wonder why you are creating a new tooltip each time the user
clicks on the graph?
Why not do it the following way?
RGraph.Tooltip = function (canvas, text, x, y)
{
try {
if (RGraph.tooltip) { // if tooltip already drawn
RGraph.tooltip.innerHTML = text;
RGraph.tooltip.style.left = (canvas.offsetLeft) + x + 3;
RGraph.tooltip.style.top = (canvas.offsetTop + y) -
RGraph.tooltip.offsetHeight;
} else { // create tooltip if not drawn yet
var obj = document.createElement('DIV');
obj.style.position = 'absolute'
obj.style.backgroundColor = '#FFFFE1';
obj.style.border = '1px solid #333';
obj.style.borderRight = '2px solid #333'; // Set the right and
bottom borders to be a little thicker - gives the effect of a drop
shadow
obj.style.borderBottom = '2px solid #333'; // Set the right and
bottom borders to be a little thicker - gives the effect of a drop
shadow
obj.style.display = 'block'
obj.style.visibility = 'visible';
obj.style.paddingLeft = '3px';
obj.style.paddingRight = '3px';
obj.style.fontFamily = 'Tahoma';
obj.style.fontSize = '10pt';
/*
//alternatively one could create a tooltip css class since this is
presentation
obj.className = 'tooltip'; //IE
obj.setAttribute('class', 'tooltip'); // W3C DOM
*/
document.body.insertBefore(obj, canvas);
RGraph.tooltip = obj;
document.body.onclick = function ()
{
RGraph.tooltip.style.left = '-999'; //older opera fix
}
return RGraph.Tooltip(canvas, text, x, y);
}
return RGraph.tooltip; // return tooltip obj as stated in functions comment
} catch(e) {
return false;
}
}
Secondly CanvasTextFunctions.letters() really is in a class of its own.
And why dont you use prototype [1]?
[1] http://www.w3schools.com/jsref/jsref_prototype_array.asp
//A yeti
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