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Merge pull request #2 from scottgonzalez/interactions

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Draggable: Cleanup.
This commit is contained in:
Dave Stein 2011-10-14 11:54:59 -07:00
commit 6ea6c47855
1 changed files with 78 additions and 161 deletions
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227
ui/jquery.ui.draggable.js vendored
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@ -1,11 +1,11 @@
/*
* jQuery UI Draggable 2.0.0
* jQuery UI Draggable @VERSION
*
* Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Draggables
* http://docs.jquery.com/UI/Draggable
*
* Depends:
* jquery.ui.core.js
@ -14,90 +14,59 @@
(function( $, undefined ) {
$.widget( "ui.draggable", {
version: "@VERSION",
widgetEventPrefix: "drag",
options: {
scrollSpeed: 20,
scrollSensitivity:20,
helper: false
helper: false,
scrollSensitivity: 20,
scrollSpeed: 20
},
// TODO: actually remove data
destroy: function() {
return this;
},
// dragEl: element being dragged (original or helper)
// position: CSS position of dragEl
// offset: offset of dragEl
// startCoords: clientX/Y of the mousedown (offset of pointer)
// startPosition: CSS position prior to drag start
// startOffset: offset prior to drag start
// overflowOffset: offset of scroll parent
// overflowHeight: height of scroll parent
// overflowWidth: width of scroll parent
_create: function() {
// Either initialized element or the helper
this.dragEl = false,
this.position = {},
this.offset = {},
// Start X/Y coords of mouse before drag
this.startCoords = {},
// Start position of element before drag
this.startPosition = {},
// Start offset of element before drag
this.startOffset = {},
// TODO: add these to the base widget
this.doc = $( this.element[0].ownerDocument );
this.win = $( this.doc[0].defaultView );
this.scrollParent = this.element.scrollParent();
// Offset of scrollParent, used for auto-scrolling
this.overflowOffset = {};
// Height of scrollParent, used for auto-scrolling
this.overflowHeight = 0;
// Width of scrollParent, used for auto-scrolling
this.overflowWidth = 0;
// Static position elements can"t be moved with top/left
// Static position elements can't be moved with top/left
if ( this.element.css( "position" ) === "static" ) {
this.element.css( "position", "relative" );
}
// Using proxy to avoid anon functions using self to pass "this" along
this.element.bind( "mousedown." + this.widgetName, $.proxy( this._mouseDown, this ) );
// TODO: use _bind()
this.element.bind( "mousedown." + this.widgetName, $.proxy( this, "_mouseDown" ) );
},
_usingHelper : function() {
return ( this.options.helper === true || typeof this.options.helper === 'function' );
},
_setPosition: function() {
// TODO: why is relative handled differently than fixed/absolute?
_getPosition: function() {
var left, top, position,
scrollTop = this.scrollParent.scrollTop(),
scrollLeft = this.scrollParent.scrollLeft();
// Helper is appended to body so offset of element is all that's needed
if ( this._usingHelper() ) {
return this.element.offset();
}
scrollTop = this.scrollParent.scrollTop(),
scrollLeft = this.scrollParent.scrollLeft();
// If fixed or absolute
if ( this.cssPosition !== "relative" ) {
position = this.dragEl.position();
// Take into account scrollbar
position.top = position.top - scrollTop;
position.left = position.left - scrollLeft
position.top -= scrollTop;
position.left -= scrollLeft
return position;
}
/** When using relative, css values are checked **/
// When using relative, css values are checked
left = this.dragEl.css( "left" );
top = this.dragEl.css( "top" );
@ -106,64 +75,42 @@ $.widget( "ui.draggable", {
top = ( top === "auto" ) ? 0: parseInt( top, 10 );
return {
left: left - scrollLeft,
top: top - scrollTop
};
},
_mouseDown: function( event ) {
// Stop browser from highlighting, among other things
event.preventDefault();
// Prevent text selection, among other things
event.preventDefault();
// The actual dragging element, should always be a jQuery object
this.dragEl = this.element;
this.cssPosition = this.dragEl.css( "position" );
// Helper required, so clone, hide, and set reference
if ( this._usingHelper() ) {
// If getting a cloned helper
// Helper required
if ( this.options.helper ) {
// clone
if ( this.options.helper === true ) {
this.dragEl = this.element.clone();
// If source element has an ID, change ID of helper to avoid overlap
this.dragEl = this.element.clone();
if ( this.element.attr( "id" ) ) {
this.dragEl.attr( "id", this.element.attr( "id" ) + "-" + this.widgetName );
}
} else {
this.dragEl = this.options.helper();
// If function was passed, it should return a DOMElement
if ( typeof this.dragEl.nodeType !== 'number' ) {
throw "Helper function must return a DOMElement";
}
this.dragEl = $( this.dragEl );
// TODO: figure out the signature for this; see #4957
this.dragEl = $( this.options.helper() );
}
// Automatically make helper absolute
this.dragEl
.css({
position: "absolute"
});
$( "body" ).append( this.dragEl );
// TODO: should we move this to the stylesheet and use a class?
.css( "position", "absolute" )
.appendTo( this.doc[0].body )
.offset( this.element.offset() );
}
// Cache starting absolute and relative positions
this.startPosition = this._setPosition();
this.startPosition = this._getPosition();
this.startOffset = this.dragEl.offset();
// Cache current position and offset
@ -176,38 +123,28 @@ $.widget( "ui.draggable", {
};
// Cache the offset of scrollParent
// TODO: store overflow height/width in a hash instead of separate properties
this.overflowOffset = this.scrollParent.offset();
this.overflowHeight = ( this.scrollParent[0] === document ) ? $(window).height() : this.scrollParent.height();
this.overflowWidth = ( this.scrollParent[0] === document ) ? $(window).width() : this.scrollParent.width();
this.overflowHeight = ( this.scrollParent[0] === this.doc[0] ) ?
this.win.height() : this.scrollParent.height();
this.overflowWidth = ( this.scrollParent[0] === this.doc[0] ) ?
this.win.width() : this.scrollParent.width();
this._trigger( "start", event );
$(document).bind( "mousemove." + this.widgetName, $.proxy( this._mouseMove, this ) )
.bind( "mouseup." + this.widgetName, $.proxy( this._mouseUp, this ) );
// Set the helper up by actual element
if ( this._usingHelper() ) {
// get the absolute position of element so that helper will know where to go
elOffset = this.element.offset();
this.dragEl.css({
display: "block",
top: elOffset.top + "px",
left: elOffset.left + "px"
});
}
// TODO: allow modifying position, just like during drag
this._trigger( "start", event, this._uiHash() );
// TODO: use ._bind()
// TODO: rename _bind() to _on(); add _off()
this.doc
.bind( "mousemove." + this.widgetName, $.proxy( this, "_mouseMove" ) )
.bind( "mouseup." + this.widgetName, $.proxy( this, "_mouseUp" ) );
},
_mouseMove: function( event ) {
var leftDiff = event.clientX - this.startCoords.left,
topDiff = event.clientY - this.startCoords.top,
newLeft = leftDiff + this.startPosition.left,
newTop = topDiff + this.startPosition.top;
topDiff = event.clientY - this.startCoords.top,
newLeft = leftDiff + this.startPosition.left,
newTop = topDiff + this.startPosition.top;
this.position = {
left: newLeft,
@ -218,87 +155,67 @@ $.widget( "ui.draggable", {
this.offset.left = this.startOffset.left + newLeft;
this.offset.top = this.startOffset.top + newTop;
this._trigger( "drag", event );
this._trigger( "drag", event, this._uiHash() );
// User overriding left/top so shortcut math is no longer valid
if ( newLeft !== this.position.left || newTop !== this.position.top ) {
// TODO: can we just store the previous offset values
// and not go through .offset()?
// refresh offset using slower functions
this.offset = this.dragEl.offset();
}
newLeft = this.position.left;
newTop = this.position.top;
if ( this.cssPosition !== 'fixed' ) {
// TODO: does this work with nested scrollable parents?
if ( this.cssPosition !== "fixed" ) {
newLeft = newLeft + this.scrollParent.scrollLeft();
newTop = newTop + this.scrollParent.scrollTop();
}
this.dragEl.css({
left: newLeft + "px",
top: newTop + "px"
});
// Scroll the scrollParent, if needed
this._handleScrolling( event );
},
_handleScrolling: function( event ) {
var doc = $(document),
scrollTop = doc.scrollTop(),
scrollLeft = doc.scrollLeft();
var scrollTop = this.doc.scrollTop(),
scrollLeft = this.doc.scrollLeft();
// Handle vertical scrolling
if ( ( ( this.overflowHeight + scrollTop ) - event.pageY ) < this.options.scrollSensitivity ) {
doc.scrollTop( scrollTop + this.options.scrollSpeed );
this.doc.scrollTop( scrollTop + this.options.scrollSpeed );
}
// Handle horizontal scrolling
if ( ( ( this.overflowWidth + scrollLeft ) - event.pageX ) < this.options.scrollSensitivity ) {
doc.scrollLeft( scrollLeft + this.options.scrollSpeed );
this.doc.scrollLeft( scrollLeft + this.options.scrollSpeed );
}
},
_mouseUp: function( event ) {
this._trigger( "stop", event, this._uiHash() );
var doc = $(document);
this._trigger( "stop", event );
this.startCoords = {};
if ( this._usingHelper() ) {
if ( this.options.helper ) {
this.dragEl.remove();
}
doc.unbind( "mousemove." + this.widgetName );
doc.unbind( "mouseup." + this.widgetName );
this.doc
.unbind( "mousemove." + this.widgetName )
.unbind( "mouseup." + this.widgetName );
},
_uiHash: function(event) {
_uiHash: function( event ) {
return {
position: this.position,
offset: this.offset
};
}
});
$.extend($.ui.draggable, {
version: "2.0.0"
});
})(jQuery);
})( jQuery );