jquery/fx/fx.js
2006-06-22 20:14:41 +00:00

288 lines
6.5 KiB
JavaScript

// overwrite the old show method
jQuery.prototype._show = jQuery.prototype.show;
/**
* The effects module overloads the show method to now allow
* for a speed to the show operation. What actually happens is
* that the height, width, and opacity to the matched elements
* are changed dynamically. The only three current speeds are
* "slow", "normal", and "fast". For example:
* $("p").show("slow");
* Note: You should not run the show method on things
* that are already shown. This can be circumvented by doing this:
* $("p:hidden").show("slow");
*/
jQuery.prototype.show = function(speed,callback){
return speed ? this.animate({
height: "show", width: "show", opacity: "show"
}, speed, callback) : this._show();
};
// We're overwriting the old hide method
jQuery.prototype._hide = jQuery.prototype.hide;
/**
* The hide function behaves very similary to the show function,
* but is just the opposite.
* $("p:visible").hide("slow");
*/
jQuery.prototype.hide = function(speed,callback){
return speed ? this.animate({
height: "hide",
width: "hide",
opacity: "hide"
}, speed, callback) : this._hide();
};
/**
* This function increases the height and opacity for all matched
* elements. This is very similar to 'show', but does not change
* the width - creating a neat sliding effect.
* $("p:hidden").slideDown("slow");
*/
jQuery.prototype.slideDown = function(speed,callback){
return this.animate({height: "show"}, speed, callback);
};
/**
* Just like slideDown, only it hides all matched elements.
* $("p:visible").slideUp("slow");
*/
jQuery.prototype.slideUp = function(speed,callback){
return this.animate({height: "hide"}, speed, callback);
};
/**
* Adjusts the opacity of all matched elements from a hidden,
* to a fully visible, state.
* $("p:hidden").fadeIn("slow");
*/
jQuery.prototype.fadeIn = function(speed,callback){
return this.animate({opacity: "show"}, speed, callback);
};
/**
* Same as fadeIn, but transitions from a visible, to a hidden state.
* $("p:visible").fadeOut("slow");
*/
jQuery.prototype.fadeOut = function(speed,callback){
return this.animate({opacity: "hide"}, speed, callback);
};
/**
* ...
*/
jQuery.prototype.fadeTo = function(speed,to,callback){
return this.animate({opacity: to}, speed, callback);
};
/**
*
*/
jQuery.prototype.animate = function(prop,speed,callback) {
return this.queue(function(){
var i = 0;
for ( var p in prop ) {
var e = new fx( this, jQuery.speed(speed,callback,i++), p );
if ( prop[p].constructor == Number )
e.custom( e.cur(), prop[p] );
else
e[ prop[p] ]();
}
});
};
jQuery.speed = function(s,o,i) {
o = o || {};
if ( o.constructor == Function )
o = { complete: o };
var ss = {"slow":600,"fast":200};
o.duration = s.constructor == Number ? s : ss[s] || 400;
// Queueing
o.oldComplete = o.complete;
o.complete = function(){
jQuery.dequeue(this, "fx");
if ( o.oldComplete && o.oldComplete.constructor == Function )
o.oldComplete.apply( this );
};
if ( i > 0 )
o.complete = null;
return o;
};
jQuery.queue = {};
jQuery.dequeue = function(elem,type){
type = type || "fx";
if ( elem.queue && elem.queue[type] ) {
// Remove self
elem.queue[type].shift();
// Get next function
var f = elem.queue[type][0];
if ( f )
f.apply( elem );
}
};
jQuery.prototype.queue = function(type,fn){
if ( !fn ) {
fn = type;
type = "fx";
}
return this.each(function(){
if ( !this.queue )
this.queue = {};
if ( !this.queue[type] )
this.queue[type] = [];
this.queue[type].push( fn );
if ( this.queue[type].length == 1 )
fn.apply(this);
});
};
jQuery.setAuto = function(e,p) {
var a = e.style[p];
var o = jQuery.css(e,p);
e.style[p] = "auto";
var n = jQuery.css(e,p);
if ( o != n )
e.style[p] = a;
};
/*
* I originally wrote fx() as a clone of moo.fx and in the process
* of making it small in size the code became illegible to sane
* people. You've been warned.
*/
jQuery.fx = function( elem, options, prop ){
var z = this;
// The users options
z.o = {
duration: options.duration || 400,
complete: options.complete
};
// The element
z.el = elem;
// The styles
var y = z.el.style;
// Simple function for setting a style value
z.a = function(){
if ( prop == "opacity" ) {
if (z.now == 1) z.now = 0.9999;
if (window.ActiveXObject)
y.filter = "alpha(opacity=" + z.now*100 + ")";
y.opacity = z.now;
} else
y[prop] = z.now+"px";
};
// Figure out the maximum number to run to
z.max = function(){
return z.el["orig"+prop] || z.cur();
};
// Get the current size
z.cur = function(){
return parseFloat( jQuery.css(z.el,prop) );
};
// Start an animation from one number to another
z.custom = function(from,to){
z.startTime = (new Date()).getTime();
z.now = from;
z.a();
z.timer = setInterval(function(){
z.step(from, to);
}, 13);
};
// Simple 'show' function
z.show = function(){
y.display = "block";
z.o.auto = true;
z.custom(0,z.max());
};
// Simple 'hide' function
z.hide = function(){
// Remember where we started, so that we can go back to it later
z.el["orig"+prop] = this.cur();
// Begin the animation
z.custom(z.cur(),0);
};
// IE has trouble with opacity if it doesn't have layout
if ( jQuery.browser == "msie" && !z.el.currentStyle.hasLayout )
y.zoom = 1;
// Remember the overflow of the element
z.oldOverflow = y.overflow;
// Make sure that nothing sneaks out
y.overflow = "hidden";
// Each step of an animation
z.step = function(firstNum, lastNum){
var t = (new Date()).getTime();
if (t > z.o.duration + z.startTime) {
// Stop the timer
clearInterval(z.timer);
z.timer = null;
z.now = lastNum;
z.a();
// Reset the overflow
y.overflow = z.oldOverflow;
// If the element was shown, and not using a custom number,
// set its height and/or width to auto
if ( (prop == "height" || prop == "width") && z.o.auto )
jQuery.setAuto( z.el, prop );
// If a callback was provided, execute it
if( z.o.complete.constructor == Function ) {
// Yes, this is a weird place for this, but it needs to be executed
// only once per cluster of effects.
// If the element is, effectively, hidden - hide it
if ( y.height == "0px" || y.width == "0px" )
y.display = "none";
// Execute the complete function
z.o.complete.apply( z.el );
}
} else {
// Figure out where in the animation we are and set the number
var p = (t - this.startTime) / z.o.duration;
z.now = ((-Math.cos(p*Math.PI)/2) + 0.5) * (lastNum-firstNum) + firstNum;
// Perform the next step of the animation
z.a();
}
};
};