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Copy pathCarousel.js
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Copy pathCarousel.js
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1249 lines (933 loc) · 37.1 KB
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if(!javaxt) var javaxt={};
if(!javaxt.dhtml) javaxt.dhtml={};
//******************************************************************************
//** Carousel
//******************************************************************************
/**
* Component used to render two or more panels in a horizonal layout. Users
* can cycle through the panels using the back() and next() functions. The
* carousel can store a fixed set of panels or you can create the illusion
* of having infinite panels by updating panels when they are out of view.
* Example:
<pre>
var carousel = new javaxt.dhtml.Carousel(parent,{
loop: true,
animate: true
});
</pre>
* Once the carousel is instantiated you can call any of the public methods.
* The first thing to do is to add panels. Example:
<pre>
var p1 = document.createElement('div');
p1.style.background = "#f0f8ff";
p1.style.height = "100%";
carousel.add(p1);
var p2 = document.createElement('div');
p2.style.background = "#96a5b2";
p2.style.height = "100%";
carousel.add(p2);
var p3 = document.createElement('div');
p3.style.background = "#ffd8d6";
p3.style.height = "100%";
carousel.add(p3);
</pre>
* After panels have been added to the carousel, you can call the back() and
* next() methods to switch panels. Typically these methods are called from
* "onclick" events fired from other DOM elements (e.g. button).
*
* Finally, you can also add event listeners by overriding any of the public
* "on" or "before" methods like this:
<pre>
carousel.onChange = function(currPanel, prevPanel){
console.log("currPanel", currPanel);
};
</pre>
*
******************************************************************************/
javaxt.dhtml.Carousel = function(parent, config) {
this.className = "javaxt.dhtml.Carousel";
var me = this;
var outerDiv, innerDiv;
var currPanel;
var sliding = false;
var noselect;
var resizeListener;
var defaultConfig = {
/** If true, will animate transitions when calling the back() and next()
* functions.
*/
animate: true,
/** Time to transition between panels, in milliseconds. Only applicable
* when "animate" is set to true.
*/
animationSteps: 250.0,
/** Transition effect. Only applicable when "animate" is set to true and
* an "fx" config is given. See the javaxt.dhtml.Effects class for
* a list of options.
*/
transitionEffect: "linear",
/** An instance of a javaxt.dhtml.Effects class used to animate
* transitions. Only used when "animate" is set to true.
*/
fx: null,
/** By default, a user cannot go past the last panel in the carousel when
* calling next() or past the first panel when calling back(). However,
* when "loop" is set to true, users can go past the first/last panels
* by cloning the "next" or "previous" panel and appending it to
* the carousel so you can cycle through elements.
*/
loop: false,
/** If true, will move the next panel over the current panel during
* transitions. Only applicable when "animate" is set to true.
*/
slideOver: false,
/** If true, will allow users to slide back and forth through the panels
* using touch gestures.
*/
drag: true,
/** Cursor style when dragging. Only applicable when "drag" is set to
* true.
*/
dragCursor: "ew-resize", //grabbing
/** Currently unused
*/
visiblePanels: 1,
/** Amount of padding between panels, in pixels.
*/
padding: 0
};
//**************************************************************************
//** Constructor
//**************************************************************************
var init = function(){
if (typeof parent === "string"){
parent = document.getElementById(parent);
}
if (!parent) return;
//Clone the config so we don't modify the original config object
var clone = {};
merge(clone, config);
//Merge clone with default config
merge(clone, defaultConfig);
config = clone;
//Update event handlers
for (var key in config) {
if (config.hasOwnProperty(key)){
if (typeof config[key] == "function") {
if (me[key] && typeof me[key] == "function"){
me[key] = config[key];
}
}
}
}
//Remove anything found inside the parent
var items = [];
if (config.items){
items = config.items;
}
else{
for (var i=0; i<parent.childNodes.length; i++){
var node = parent.childNodes[i];
if (node.nodeType===1){
items.push(node);
}
}
for (var i=0; i<items.length; i++){
parent.removeChild(items[i]);
}
parent.innerHTML = "";
}
//Create overflow divs
outerDiv = createElement('div', parent, {
width: "100%",
height: "100%",
position: "relative"
});
outerDiv.className = "javaxt-carousel";
me.el = outerDiv;
var overflowDiv = createElement('div', outerDiv, {
width: "100%",
height: "100%",
position: "absolute",
overflow: "hidden"
});
var padding = config.padding;
if (padding>0){
overflowDiv.style.padding = "0 " + padding + "px";
overflowDiv.style.left = -padding + "px";
}
outerDiv.appendChild(overflowDiv);
//Create main div used to store panels. This div will move horizontally
innerDiv = createElement('div', overflowDiv, {
left: "0px",
height: "100%",
position: "absolute"
});
if (config.drag===true){
addNoSelectRule();
initDrag(innerDiv);
}
/*
//Create logic to process touch events
var touchStartTime;
var touchEndTime;
var x1, x2, y1, y2;
innerDiv.ontouchstart = function(e) {
e.preventDefault();
x1 = e.changedTouches[0].pageX;
y1 = e.changedTouches[0].pageY;
touchStartTime = new Date().getTime();
touchEndTime = null;
};
innerDiv.ontouchend = function(e) {
touchEndTime= new Date().getTime();
x2 = e.changedTouches[0].pageX;
y2 = e.changedTouches[0].pageY;
var distance = Math.sqrt( (x2-=x1)*x2 + (y2-=y1)*y2 );
if (distance<0) distance = -distance;
var duration = touchEndTime - touchStartTime;
if (duration <= 500 && distance <= 10) {
// Person tapped their finger (do click/tap stuff here)
}
if (duration > 500 && distance <= 10) {
// Person pressed their finger (not a quick tap)
}
if (duration <= 100 && distance > 10) {
// Person flicked their finger
}
if (duration > 100 && distance > 10) {
// Person dragged their finger
}
};
*/
for (var i=0; i<items.length; i++){
me.add(items[i]);
}
//Add public show/hide methods
addShowHide(me);
//Watch for resize events
resizeListener = addResizeListener(parent, function(){
me.resize();
});
//Check whether the carousel has been added to the DOM
onRender(outerDiv, function(){
me.resize();
me.onRender();
});
};
//**************************************************************************
//** destroy
//**************************************************************************
/** Used to destroy the carousel and remove it from the DOM
*/
this.destroy = function(){
if (resizeListener) resizeListener.destroy();
me.disableAnimation();
sliding = true;
destroy(me);
me = null;
return me;
};
//**************************************************************************
//** onRender
//**************************************************************************
/** Called after the carousel has been added to the DOM
*/
this.onRender = function(){};
//**************************************************************************
//** onResize
//**************************************************************************
/** Called after the carousel has been resized
*/
this.onResize = function(){};
//**************************************************************************
//** add
//**************************************************************************
/** Used to add a panel to the carousel
*/
this.add = function(el){
//Get width of the innerDiv before adding a new panel
var w = parseInt(innerDiv.style.width);
if (isNaN(w)) w = 0;
//Create divs (for overflow purposes)
var div = createElement('div', innerDiv, {
width: outerDiv.offsetWidth+"px",
height: "100%",
position: "relative",
display: "inline-block"
});
var padding = config.padding;
if (padding>0){
div.style.width=(outerDiv.offsetWidth + (padding*2))+"px";
}
var overflowDiv = createElement('div', div, {
width: "100%",
height: "100%",
position: "absolute",
overflow: "hidden"
});
if (padding>0){
overflowDiv.style.padding = "0 " + padding + "px";
overflowDiv.style.width=outerDiv.offsetWidth+"px";
}
//Add element to the overflow div
overflowDiv.appendChild(el);
//Update width
innerDiv.style.width = (w+div.offsetWidth)+"px";
if (!currPanel) currPanel = div;
//Resize all the divs (bug fix for Chrome)
me.resize();
};
//**************************************************************************
//** clear
//**************************************************************************
/** Used to remove all the panels from the carousel
*/
this.clear = function(){
currPanel = null;
innerDiv.innerHTML = "";
innerDiv.style.left = "0px";
sliding = false;
resize();
};
//**************************************************************************
//** resize
//**************************************************************************
/** Used to force the component to resize to fit the parent container
*/
this.resize = function(){
var w = outerDiv.offsetWidth;
if (w===0 || isNaN(w)){
var timer;
var checkWidth = function(){
var w = outerDiv.offsetWidth;
if (w===0 || isNaN(w)){
timer = setTimeout(checkWidth, 100);
}
else{
clearTimeout(timer);
resize();
}
};
timer = setTimeout(checkWidth, 100);
}
else{
resize();
}
};
var resize = function(){
//Compute width of individual panels
var width = outerDiv.offsetWidth;
var padding = config.padding;
if (padding>0){
width += (padding*2);
}
//Update panel container
var numPanels = innerDiv.childNodes.length;
innerDiv.style.width = (width*numPanels) + "px";
//Update individual panels
var currPanelIdx = 0;
for (var i=0; i<numPanels; i++){
innerDiv.childNodes[i].style.width = width + "px";
if (padding>0){
var overflowDiv = innerDiv.childNodes[i].childNodes[0];
overflowDiv.style.width=outerDiv.offsetWidth+"px";
}
if (innerDiv.childNodes[i]==currPanel){
currPanelIdx = i;
}
}
me.onResize();
//Update position
if (sliding) return;
innerDiv.style.left = -(currPanelIdx*width)+"px";
};
//**************************************************************************
//** slide
//**************************************************************************
var slide = function(el, start, end, lastTick, timeLeft, callback){
if (config.fx){
setTimeout(function(){
config.fx.setTransition(el, config.transitionEffect, config.animationSteps);
el.style.left = end+"px";
setTimeout(function(){
el.style.WebkitTransition =
el.style.MozTransition =
el.style.MsTransition =
el.style.OTransition =
el.style.transition = "";
if (callback) callback.apply(me, []);
}, config.animationSteps+50);
}, 50);
}
else{
var curTick = new Date().getTime();
var elapsedTicks = curTick - lastTick;
//If the animation is complete, ensure that the panel is completely visible
if (timeLeft <= elapsedTicks){
el.style.left = end+"px";
if (callback) callback.apply(me, []);
return;
}
timeLeft -= elapsedTicks;
var d = start-end;
var percentComplete = 1-(timeLeft/config.animationSteps);
var offset = Math.round(percentComplete * d);
el.style.left = start-offset + "px";
setTimeout(function(){
slide(el, start, end, curTick, timeLeft, callback);
}, 33);
}
};
//**************************************************************************
//** next
//**************************************************************************
/** Used to make the next panel visible. In a horizontal configuration, the
* active panel will slide left.
*/
this.next = function(){
if (config.animate===true){
if (sliding) return;
sliding = true;
}
var start = parseInt(innerDiv.style.left);
var w;
var currDiv = currPanel.childNodes[0].childNodes[0];
var nextDiv;
var next = function(callback){
var end = start-w;
if (config.animate===true){
slide(innerDiv, start, end, new Date().getTime(), config.animationSteps, callback);
}
else{
innerDiv.style.left = end+"px";
if (callback) callback.apply(me, []);
}
};
var raiseDiv = function(div){
//Get y-offset of nextPanel
var s = 0;
for (var i=0; i<innerDiv.childNodes.length; i++){
var p = innerDiv.childNodes[i];
s+=p.offsetWidth;
if (p===currPanel) break;
}
//Update div to be an absolute div
div.style.display = "none";
currPanel.style.marginRight = w +"px";
div.style.position = "absolute";
div.style.zIndex = 2;
div.style.left = s + "px";
div.style.top = "0px";
div.style.display = "";
return s;
};
var lowerDiv = function(div){
div.style.display = "inline-block";
div.style.position = "relative";
div.style.zIndex = "";
div.style.left = "";
div.style.top = "";
};
var nextPanel = currPanel.nextSibling;
if (nextPanel) {
nextDiv = nextPanel.childNodes[0].childNodes[0];
me.beforeChange(currDiv, nextDiv, "next");
var onChange = function(){
me.onChange(nextDiv, currDiv);
currPanel = nextPanel;
sliding = false;
};
w = nextPanel.offsetWidth;
if (config.slideOver===true && config.animate===true){
//Update nextPanel to be an absolute div
var s = raiseDiv(nextPanel);
//Slide nextPanel over currPanel
slide(nextPanel, s, s-w, new Date().getTime(), config.animationSteps, function(){
//Slide innerDiv
var end = start-w;
innerDiv.style.left = end+"px";
currPanel.style.marginRight = "0px";
//Update nextPanel to it's original state (e.g. relative div)
lowerDiv(nextPanel);
//Call onChange
onChange();
});
}
else{
next(onChange);
}
}
else{
if (config.loop===true){
var firstDiv = innerDiv.childNodes[0];
w = firstDiv.offsetWidth;
var clone = firstDiv.cloneNode(true);
innerDiv.style.width = (innerDiv.offsetWidth+w)+"px";
innerDiv.appendChild(clone);
nextDiv = clone.childNodes[0].childNodes[0];
me.beforeChange(currDiv, nextDiv, "next");
var onChange = function(){
innerDiv.style.left = start + "px";
innerDiv.removeChild(firstDiv);
innerDiv.style.width = (innerDiv.offsetWidth-w)+"px";
me.onChange(nextDiv, currDiv);
currPanel = clone;
sliding = false;
};
if (config.slideOver===true && config.animate===true){
//Update clone to be an absolute div
var s = raiseDiv(clone);
//Slide nextPanel over currPanel
slide(clone, s, s-w, new Date().getTime(), config.animationSteps, function(){
//Slide innerDiv
currPanel.style.marginRight = "0px";
//Update clone to it's original state (e.g. relative div)
lowerDiv(clone);
//Call onChange
onChange();
});
}
else{
next(onChange);
}
}
else{
sliding = false;
}
}
};
//**************************************************************************
//** back
//**************************************************************************
/** Used to make the previous panel visible. In a horizontal configuration,
* the active panel will slide right.
*/
this.back = function(){
if (config.animate===true){
if (sliding) return;
sliding = true;
}
var start, end, w;
var currDiv = currPanel.childNodes[0].childNodes[0];
var nextDiv;
var back = function(callback){
if (config.animate===true){
slide(innerDiv, start, end, new Date().getTime(), config.animationSteps, callback);
}
else{
innerDiv.style.left = end+"px";
if (callback) callback.apply(me, []);
}
};
var raiseDiv = function(div){
//Get y-offset of div
var s = 0;
for (var i=0; i<innerDiv.childNodes.length; i++){
var p = innerDiv.childNodes[i];
if (p===div) break;
s+=p.offsetWidth;
}
//Update div to be an absolute div
div.style.display = "none";
currPanel.style.marginLeft = w +"px";
div.style.position = "absolute";
div.style.zIndex = 2;
div.style.left = s + "px";
div.style.top = "0px";
div.style.display = "";
return s;
};
var lowerDiv = function(div){
div.style.display = "inline-block";
div.style.position = "relative";
div.style.zIndex = "";
div.style.left = "";
div.style.top = "";
};
var nextPanel = currPanel.previousSibling;
if (nextPanel){
nextDiv = nextPanel.childNodes[0].childNodes[0];
me.beforeChange(currDiv, nextDiv, "back");
var onChange = function(){
me.onChange(nextDiv, currDiv);
currPanel = nextPanel;
sliding = false;
};
w = nextPanel.offsetWidth;
start = parseFloat(innerDiv.style.left);
end = start + w;
if (config.slideOver===true && config.animate===true){
//Update nextPanel to be an absolute div
var s = raiseDiv(nextPanel);
//Slide nextPanel over currPanel
slide(nextPanel, s, s+w, new Date().getTime(), config.animationSteps, function(){
//Slide innerDiv
innerDiv.style.left = end+"px";
currPanel.style.marginLeft = "0px";
//Update nextPanel to it's original state (e.g. relative div)
lowerDiv(nextPanel);
//Call onChange
onChange();
});
}
else{
back(onChange);
}
}
else{
if (config.loop===true){
var lastDiv = innerDiv.childNodes[innerDiv.childNodes.length-1];
w = lastDiv.offsetWidth;
var clone = lastDiv.cloneNode(true);
innerDiv.style.width = (innerDiv.offsetWidth+w)+"px";
innerDiv.insertBefore(clone, innerDiv.firstChild);
nextDiv = clone.childNodes[0].childNodes[0];
me.beforeChange(currDiv, nextDiv, "back");
var onChange = function(){
me.onChange(nextDiv, currDiv);
currPanel = clone;
sliding = false;
};
start = -w;
end = 0;
if (config.slideOver===true && config.animate===true){
//Update clone to be an absolute div
raiseDiv(clone);
var s = -w;
clone.style.left = s + "px";
innerDiv.style.width = (innerDiv.offsetWidth-w)+"px";
currPanel.style.marginLeft = "0px";
//Slide clone over currPanel
slide(clone, s, s+w, new Date().getTime(), config.animationSteps, function(){
//Remove lastDiv
innerDiv.removeChild(lastDiv);
//Update clone to it's original state (e.g. relative div)
lowerDiv(clone);
//Call onChange
onChange();
});
}
else{
innerDiv.style.left = start + "px";
back(function(){
innerDiv.removeChild(lastDiv);
innerDiv.style.width = (innerDiv.offsetWidth-w)+"px";
onChange();
});
}
}
else{
sliding = false;
}
}
};
//**************************************************************************
//** onChange
//**************************************************************************
/** Called after the carousel switches panels
* @param currPanel Content of the active panel
* @param prevPanel Content of the previously active panel
*/
this.onChange = function(currPanel, prevPanel){};
//**************************************************************************
//** beforeChange
//**************************************************************************
/** Called before the carousel switches panels.
* @param currPanel Content of the active panel
* @param prevPanel Content of the next active panel
* @param direction "back" or "next"
*/
this.beforeChange = function(currPanel, nextPanel, direction){};
//**************************************************************************
//** onDragStart
//**************************************************************************
/** Called when a client begins to drag a panel in the carousel
* @param currPanel Content of the active panel
*/
this.onDragStart = function(currPanel){};
//**************************************************************************
//** onDragEnd
//**************************************************************************
/** Called when a client completes a drag event
* @param currPanel Content of the active panel
*/
this.onDragEnd = function(currPanel){};
//**************************************************************************
//** getPanels
//**************************************************************************
/** Returns an array with information for each panel in the carousel. Each
* element in the array contains the following information:
* <ul>
* <li>div: DOM element associated with the panel</li>
* <li>isVisible: Used to indicate whether the panel is intersects the
* parent container</li>
* <li>visibleArea: Total area that the panel covers in the parent
* container</li>
* </ul>
*/
this.getPanels = function(){
var arr = [];
var r1 = _getRect(outerDiv);
var n = parseInt(config.padding);
if (isNaN(n)) n = 0;
for (var i=0; i<innerDiv.childNodes.length; i++){
var panel = innerDiv.childNodes[i];
var r2 = _getRect(panel);
var isVisible = false; //intersects(r1, r2);
var leftOverlap = 0;
var rightOverlap = 0;
if (r2.right > r1.left && r2.left < r1.right){
isVisible = true;
if (r2.right < r1.right){
leftOverlap = r2.right - r1.left;
}
else{
rightOverlap = r1.right - r2.left;
}
}
if (isVisible){
if ((leftOverlap-n>0 && leftOverlap-n<1) || (rightOverlap-n>0 && rightOverlap-n<1)){
isVisible = false;
}
}
arr.push({
div: panel.childNodes[0].childNodes[0],
isVisible: isVisible,
visibleArea: getAreaOfIntersection(r1, r2)
});
}
return arr;
};
//**************************************************************************
//** enableAnimation
//**************************************************************************
/** Used to enable animations when transitioning between panels
*/
this.enableAnimation = function(){
config.animate = true;
};
//**************************************************************************
//** disableAnimation
//**************************************************************************
/** Used to disable animations when transitioning between panels
*/
this.disableAnimation = function(){
config.animate = false;
};
//**************************************************************************
//** initDrag
//**************************************************************************
var initDrag = function(){
//This is how many milliseconds to wait before recognizing a hold
var holdDelay = 50;
var startX, offsetX;
var prevPanel;
var notify = true;
//Function called when a drag is initiated
var onDragStart = function(e){
startX = e.clientX;
offsetX = parseInt(innerDiv.style.left);
//Disable text selection in the entire document - very important!
var body = document.getElementsByTagName('body')[0];
if (!body.className.match(/(?:^|\s)javaxt-noselect(?!\S)/) ){
body.className += (body.className.length==0 ? "" : " ") + "javaxt-noselect";
}
prevPanel = currPanel;
};
//Function called while the div is being dragged
var onDrag = function(e){
var x = e.clientX;
var d = startX-x; //If d is positive, client is sliding to the right.
//Otherwise, client is sliding to the left.
//Fire onDragStart event once we actually have some movement
if (notify){
if (d!==0){
me.onDragStart(currPanel.childNodes[0].childNodes[0]);
notify = false;
}
}
//Update cursor style
innerDiv.style.cursor = config.dragCursor;
var left = offsetX-d;
innerDiv.style.left = left + 'px';