egroupware_official/etemplate/js/lib/tooltip.js

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/**
* eGroupware2 UI - Tooltip JS
*
* This javascript file contains the JavaScript code for the etemplate2 tooltip
*
* @link http://www.egroupware.org
* @author Andreas Stoeckel (as@stylite.de)
* @version $Id: tooltip.js 31497 2010-07-22 09:50:11Z igel457 $
*/
/* Tooltip handling */
function egw_tooltip()
{
this.tooltip_div = null;
this.current_elem = null;
this.time_delta = 100;
this.show_delta = 0;
this.show_delay = 800;
this.x = 0;
this.y = 0;
}
egw_tooltip.prototype.bindToElement = function(_elem, _text)
{
if (_text != '')
{
var self = this;
_elem.bind('mouseenter.tooltip', function(e) {
if (_elem != self.current_elem)
{
//Prepare the tooltip
self._prepare(_text);
self.current_elem = _elem;
self.show_delta = 0;
self.x = e.clientX;
self.y = e.clientY;
window.setTimeout(function() {self.showHintTimeout();}, self.time_delta);
}
return false;
});
_elem.bind('mouseleave.tooltip', function() {
self.current_elem = null;
self.show_delta = 0;
//self.hide();
if (self.tooltip_div)
{
self.tooltip_div.fadeOut(100);
}
});
_elem.bind('mousemove.tooltip', function(e) {
//Calculate the distance the mouse took since the last call of mousemove
var dx = self.x - e.clientX;
var dy = self.y - e.clientY;
var movedist = Math.sqrt(dx * dx + dy * dy);
//Block appereance of the tooltip on fast movements (with small movedistances)
if (movedist > 2)
self.show_delta = 0;
self.x = e.clientX;
self.y = e.clientY;
});
}
}
egw_tooltip.prototype.unbindFromElement = function(_elem)
{
_elem.unbind('mouseenter.tooltip');
_elem.unbind('mouseleave.tooltip');
_elem.unbind('mousemove.tooltip');
}
egw_tooltip.prototype.showHintTimeout = function()
{
if (this.current_elem != null)
{
this.show_delta += this.time_delta;
if (this.show_delta < this.show_delay)
{
//Repeat the call of timeout
var self = this;
window.setTimeout(function() {self.showHintTimeout();}, this.time_delta);
}
else
{
this.show_delta = 0;
this.show();
}
}
}
egw_tooltip.prototype._prepare = function(_text)
{
var self = this;
//Remove the old tooltip
if (this.tooltip_div)
this.hide();
//Generate the tooltip div, set it's text and append it to the body tag
this.tooltip_div = $j(document.createElement('div'));
this.tooltip_div.hide();
this.tooltip_div.append(_text);
this.tooltip_div.addClass("egw_tooltip");
$j('body').append(this.tooltip_div);
//The tooltip should automatically hide when the mouse comes over it
this.tooltip_div.mouseenter(function() {
self.hide();
});
}
egw_tooltip.prototype.show = function()
{
if (this.tooltip_div)
{
//Calculate the cursor_rectangle - this is a space the tooltip might
//not overlap with
var cursor_rect = {
left: (this.x - 8),
top: (this.y - 8),
right: (this.x + 8),
bottom: (this.y + 8)
};
//Calculate how much space is left on each side of the rectangle
var window_width = $j(document).width();
var window_height = $j(document).height();
var space_left = {
left: (cursor_rect.left),
top: (cursor_rect.top),
right: (window_width - cursor_rect.right),
bottom: (window_height - cursor_rect.bottom)
};
//Get the width and the height of the tooltip
var tooltip_width = this.tooltip_div.width();
if (tooltip_width > 300) tooltip_width = 300;
var tooltip_height = this.tooltip_div.height();
if (space_left.right < tooltip_width) {
this.tooltip_div.css('left', cursor_rect.left - tooltip_width);
} else if (space_left.left >= tooltip_width) {
this.tooltip_div.css('left', cursor_rect.right);
} else {
this.tooltip_div.css('left', cursor_rect.right);
this.tooltip_div.css('max-width', space_left.right);
}
if (space_left.bottom < tooltip_height) {
this.tooltip_div.css('top', cursor_rect.top - tooltip_height);
} else if (space_left.top >= tooltip_height) {
this.tooltip_div.css('top', cursor_rect.bottom);
} else {
this.tooltip_div.css('top', cursor_rect.bottom);
this.tooltip_div.css('max-height', space_left.bottom);
}
this.tooltip_div.fadeIn(100);
}
}
egw_tooltip.prototype.hide = function()
{
if (this.tooltip_div)
{
this.tooltip_div.remove();
this.tooltip_div = null;
}
}
//A reference to the current tooltip object
window.egw_global_tooltip = new egw_tooltip();