/**
* @class Ext.Element
*/
Ext.Element.addMethods({
/**
* Gets the x,y coordinates specified by the anchor position on the element.
* @param {String} anchor (optional) The specified anchor position (defaults to "c"). See {@link #alignTo}
* for details on supported anchor positions.
* @param {Boolean} local (optional) True to get the local (element top/left-relative) anchor position instead
* of page coordinates
* @param {Object} size (optional) An object containing the size to use for calculating anchor position
* {width: (target width), height: (target height)} (defaults to the element's current size)
* @return {Array} [x, y] An array containing the element's x and y coordinates
*/
getAnchorXY : function(anchor, local, s){
//Passing a different size is useful for pre-calculating anchors,
//especially for anchored animations that change the el size.
anchor = (anchor || "tl").toLowerCase();
s = s || {};
var me = this,
vp = me.dom == document.body || me.dom == document,
w = s.width || vp ? Ext.lib.Dom.getViewWidth() : me.getWidth(),
h = s.height || vp ? Ext.lib.Dom.getViewHeight() : me.getHeight(),
xy,
r = Math.round,
o = me.getXY(),
scroll = me.getScroll(),
extraX = vp ? scroll.left : !local ? o[0] : 0,
extraY = vp ? scroll.top : !local ? o[1] : 0,
hash = {
c : [r(w * 0.5), r(h * 0.5)],
t : [r(w * 0.5), 0],
l : [0, r(h * 0.5)],
r : [w, r(h * 0.5)],
b : [r(w * 0.5), h],
tl : [0, 0],
bl : [0, h],
br : [w, h],
tr : [w, 0]
};
xy = hash[anchor];
return [xy[0] + extraX, xy[1] + extraY];
},
/**
* Anchors an element to another element and realigns it when the window is resized.
* @param {Mixed} element The element to align to.
* @param {String} position The position to align to.
* @param {Array} offsets (optional) Offset the positioning by [x, y]
* @param {Boolean/Object} animate (optional) True for the default animation or a standard Element animation config object
* @param {Boolean/Number} monitorScroll (optional) True to monitor body scroll and reposition. If this parameter
* is a number, it is used as the buffer delay (defaults to 50ms).
* @param {Function} callback The function to call after the animation finishes
* @return {Ext.Element} this
*/
anchorTo : function(el, alignment, offsets, animate, monitorScroll, callback){
var me = this,
dom = me.dom;
function action(){
Ext.fly(dom).alignTo(el, alignment, offsets, animate);
Ext.callback(callback, Ext.fly(dom));
}
Ext.EventManager.onWindowResize(action, me);
if(!Ext.isEmpty(monitorScroll)){
Ext.EventManager.on(window, 'scroll', action, me,
{buffer: !isNaN(monitorScroll) ? monitorScroll : 50});
}
action.call(me); // align immediately
return me;
},
/**
* Gets the x,y coordinates to align this element with another element. See {@link #alignTo} for more info on the
* supported position values.
* @param {Mixed} element The element to align to.
* @param {String} position The position to align to.
* @param {Array} offsets (optional) Offset the positioning by [x, y]
* @return {Array} [x, y]
*/
getAlignToXY : function(el, p, o){
el = Ext.get(el);
if(!el || !el.dom){
throw "Element.alignToXY with an element that doesn't exist";
}
o = o || [0,0];
p = (p == "?" ? "tl-bl?" : (!/-/.test(p) && p !== "" ? "tl-" + p : p || "tl-bl")).toLowerCase();
var me = this,
d = me.dom,
a1,
a2,
x,
y,
//constrain the aligned el to viewport if necessary
w,
h,
r,
dw = Ext.lib.Dom.getViewWidth() -10, // 10px of margin for ie
dh = Ext.lib.Dom.getViewHeight()-10, // 10px of margin for ie
p1y,
p1x,
p2y,
p2x,
swapY,
swapX,
doc = document,
docElement = doc.documentElement,
docBody = doc.body,
scrollX = (docElement.scrollLeft || docBody.scrollLeft || 0)+5,
scrollY = (docElement.scrollTop || docBody.scrollTop || 0)+5,
c = false, //constrain to viewport
p1 = "",
p2 = "",
m = p.match(/^([a-z]+)-([a-z]+)(\?)?$/);
if(!m){
throw "Element.alignTo with an invalid alignment " + p;
}
p1 = m[1];
p2 = m[2];
c = !!m[3];
//Subtract the aligned el's internal xy from the target's offset xy
//plus custom offset to get the aligned el's new offset xy
a1 = me.getAnchorXY(p1, true);
a2 = el.getAnchorXY(p2, false);
x = a2[0] - a1[0] + o[0];
y = a2[1] - a1[1] + o[1];
if(c){
w = me.getWidth();
h = me.getHeight();
r = el.getRegion();
//If we are at a viewport boundary and the aligned el is anchored on a target border that is
//perpendicular to the vp border, allow the aligned el to slide on that border,
//otherwise swap the aligned el to the opposite border of the target.
p1y = p1.charAt(0);
p1x = p1.charAt(p1.length-1);
p2y = p2.charAt(0);
p2x = p2.charAt(p2.length-1);
swapY = ((p1y=="t" && p2y=="b") || (p1y=="b" && p2y=="t"));
swapX = ((p1x=="r" && p2x=="l") || (p1x=="l" && p2x=="r"));
if (x + w > dw + scrollX) {
x = swapX ? r.left-w : dw+scrollX-w;
}
if (x < scrollX) {
x = swapX ? r.right : scrollX;
}
if (y + h > dh + scrollY) {
y = swapY ? r.top-h : dh+scrollY-h;
}
if (y < scrollY){
y = swapY ? r.bottom : scrollY;
}
}
return [x,y];
},
/**
* Aligns this element with another element relative to the specified anchor points. If the other element is the
* document it aligns it to the viewport.
* The position parameter is optional, and can be specified in any one of the following formats:
*
* - Blank: Defaults to aligning the element's top-left corner to the target's bottom-left corner ("tl-bl").
* - One anchor (deprecated): The passed anchor position is used as the target element's anchor point.
* The element being aligned will position its top-left corner (tl) to that point. This method has been
* deprecated in favor of the newer two anchor syntax below.
* - Two anchors: If two values from the table below are passed separated by a dash, the first value is used as the
* element's anchor point, and the second value is used as the target's anchor point.
*
* In addition to the anchor points, the position parameter also supports the "?" character. If "?" is passed at the end of
* the position string, the element will attempt to align as specified, but the position will be adjusted to constrain to
* the viewport if necessary. Note that the element being aligned might be swapped to align to a different position than
* that specified in order to enforce the viewport constraints.
* Following are all of the supported anchor positions:
Value Description
----- -----------------------------
tl The top left corner (default)
t The center of the top edge
tr The top right corner
l The center of the left edge
c In the center of the element
r The center of the right edge
bl The bottom left corner
b The center of the bottom edge
br The bottom right corner
Example Usage:
// align el to other-el using the default positioning ("tl-bl", non-constrained)
el.alignTo("other-el");
// align the top left corner of el with the top right corner of other-el (constrained to viewport)
el.alignTo("other-el", "tr?");
// align the bottom right corner of el with the center left edge of other-el
el.alignTo("other-el", "br-l?");
// align the center of el with the bottom left corner of other-el and
// adjust the x position by -6 pixels (and the y position by 0)
el.alignTo("other-el", "c-bl", [-6, 0]);
* @param {Mixed} element The element to align to.
* @param {String} position The position to align to.
* @param {Array} offsets (optional) Offset the positioning by [x, y]
* @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
* @return {Ext.Element} this
*/
alignTo : function(element, position, offsets, animate){
var me = this;
return me.setXY(me.getAlignToXY(element, position, offsets),
me.preanim && !!animate ? me.preanim(arguments, 3) : false);
},
// private ==> used outside of core
adjustForConstraints : function(xy, parent, offsets){
return this.getConstrainToXY(parent || document, false, offsets, xy) || xy;
},
// private ==> used outside of core
getConstrainToXY : function(el, local, offsets, proposedXY){
var os = {top:0, left:0, bottom:0, right: 0};
return function(el, local, offsets, proposedXY){
el = Ext.get(el);
offsets = offsets ? Ext.applyIf(offsets, os) : os;
var vw, vh, vx = 0, vy = 0;
if(el.dom == document.body || el.dom == document){
vw =Ext.lib.Dom.getViewWidth();
vh = Ext.lib.Dom.getViewHeight();
}else{
vw = el.dom.clientWidth;
vh = el.dom.clientHeight;
if(!local){
var vxy = el.getXY();
vx = vxy[0];
vy = vxy[1];
}
}
var s = el.getScroll();
vx += offsets.left + s.left;
vy += offsets.top + s.top;
vw -= offsets.right;
vh -= offsets.bottom;
var vr = vx+vw;
var vb = vy+vh;
var xy = proposedXY || (!local ? this.getXY() : [this.getLeft(true), this.getTop(true)]);
var x = xy[0], y = xy[1];
var w = this.dom.offsetWidth, h = this.dom.offsetHeight;
// only move it if it needs it
var moved = false;
// first validate right/bottom
if((x + w) > vr){
x = vr - w;
moved = true;
}
if((y + h) > vb){
y = vb - h;
moved = true;
}
// then make sure top/left isn't negative
if(x < vx){
x = vx;
moved = true;
}
if(y < vy){
y = vy;
moved = true;
}
return moved ? [x, y] : false;
};
}(),
// el = Ext.get(el);
// offsets = Ext.applyIf(offsets || {}, {top : 0, left : 0, bottom : 0, right : 0});
// var me = this,
// doc = document,
// s = el.getScroll(),
// vxy = el.getXY(),
// vx = offsets.left + s.left,
// vy = offsets.top + s.top,
// vw = -offsets.right,
// vh = -offsets.bottom,
// vr,
// vb,
// xy = proposedXY || (!local ? me.getXY() : [me.getLeft(true), me.getTop(true)]),
// x = xy[0],
// y = xy[1],
// w = me.dom.offsetWidth, h = me.dom.offsetHeight,
// moved = false; // only move it if it needs it
//
//
// if(el.dom == doc.body || el.dom == doc){
// vw += Ext.lib.Dom.getViewWidth();
// vh += Ext.lib.Dom.getViewHeight();
// }else{
// vw += el.dom.clientWidth;
// vh += el.dom.clientHeight;
// if(!local){
// vx += vxy[0];
// vy += vxy[1];
// }
// }
// // first validate right/bottom
// if(x + w > vx + vw){
// x = vx + vw - w;
// moved = true;
// }
// if(y + h > vy + vh){
// y = vy + vh - h;
// moved = true;
// }
// // then make sure top/left isn't negative
// if(x < vx){
// x = vx;
// moved = true;
// }
// if(y < vy){
// y = vy;
// moved = true;
// }
// return moved ? [x, y] : false;
// },
/**
* Calculates the x, y to center this element on the screen
* @return {Array} The x, y values [x, y]
*/
getCenterXY : function(){
return this.getAlignToXY(document, 'c-c');
},
/**
* Centers the Element in either the viewport, or another Element.
* @param {Mixed} centerIn (optional) The element in which to center the element.
*/
center : function(centerIn){
return this.alignTo(centerIn || document, 'c-c');
}
});