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Draggable: Cleanup.

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This commit is contained in:
Scott González 2011-11-17 19:48:04 -05:00
parent dac3dddd9e
commit 4792d5b7af
1 changed files with 32 additions and 74 deletions
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104
ui/jquery.ui.draggable.js vendored
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@ -18,10 +18,10 @@ $.widget( "ui.draggable", {
widgetEventPrefix: "drag",
options: {
helper: false,
helper: null,
// TODO: remove scroll options
scrollSensitivity: 20,
scrollSpeed: 20,
iframeFix: false
scrollSpeed: 20
},
// dragEl: element being dragged (original or helper)
@ -34,37 +34,28 @@ $.widget( "ui.draggable", {
// overflowOffset: offset of scroll parent
// overflow: object containing width and height keys of scroll parent
// TODO: move next to _unblockFrames()
_blockFrames: function() {
var body = this.document[0].body;
var iframes = $('iframe'),
widget = this;
this.iframeBlocks = $('');
iframes.each( function() {
var iframe = $(this),
width = iframe.outerWidth(),
height = iframe.outerHeight(),
iframeOffset = iframe.offset(),
block = $('<div />');
block.css({
position: 'absolute',
width: width+'px',
height: height+'px',
top: iframeOffset.top+'px',
left: iframeOffset.left+'px'
})
.appendTo( widget.document[0].body );
widget.iframeBlocks = widget.iframeBlocks.add( block );
this.iframeBlocks = this.document.find( "iframe" ).map(function() {
var iframe = $( this ),
iframeOffset = iframe.offset();
return $( "<div>" )
.css({
position: "absolute",
width: iframe.outerWidth(),
height: iframe.outerHeight(),
top: iframeOffset.top,
left: iframeOffset.left
})
.appendTo( body )[0];
});
},
_create: function() {
// TODO: move to drag start in case DOM changes
this.scrollParent = this.element.scrollParent();
// Static position elements can't be moved with top/left
@ -128,10 +119,7 @@ $.widget( "ui.draggable", {
else if ( event.pageX < ( scrollLeft + this.options.scrollSensitivity ) ) {
this.scrollParent.scrollLeft( scrollLeft - this.options.scrollSpeed );
}
} else {
// Handle vertical scrolling
if ( ( event.pageY + this.options.scrollSensitivity ) > ( this.overflow.height + this.overflowOffset.top ) ) {
this.scrollParent.scrollTop( scrollTop + this.options.scrollSpeed );
@ -147,14 +135,11 @@ $.widget( "ui.draggable", {
else if ( ( event.pageX - this.options.scrollSensitivity ) < this.overflowOffset.left ) {
this.scrollParent.scrollLeft( scrollLeft - this.options.scrollSpeed );
}
}
},
_mouseDown: function( event ) {
var newLeft, newTop, allowed;
var newLeft, newTop;
// Prevent text selection, among other things
event.preventDefault();
@ -162,10 +147,6 @@ $.widget( "ui.draggable", {
// The actual dragging element, should always be a jQuery object
this.dragEl = this.element;
if ( this.options.iframeFix === true ) {
this._blockFrames();
}
// Helper required
if ( this.options.helper ) {
// clone
@ -217,14 +198,13 @@ $.widget( "ui.draggable", {
this._preparePosition( event );
allowed = this._trigger( "start", event, this._uiHash() );
// If user stops propagation, leave helper there ( if there's one ), disallow any CSS changes
if ( allowed !== true ) {
if ( this._trigger( "start", event, this._uiHash() ) === false ) {
this.document.unbind( "." + this.widgetName );
return;
}
this._blockFrames();
this._setCss( event );
this._bind( this.document, {
@ -234,15 +214,12 @@ $.widget( "ui.draggable", {
},
_mouseMove: function( event ) {
var newLeft, newTop, allowed;
var newLeft, newTop;
this._preparePosition( event );
allowed = this._trigger( "drag", event, this._uiHash() );
// If user stops propagation, leave helper there ( if there's one ), disallow any CSS changes
if ( allowed !== true ) {
if ( this._trigger( "drag", event, this._uiHash() ) === false ) {
this.document.unbind( "." + this.widgetName );
return;
}
@ -254,30 +231,18 @@ $.widget( "ui.draggable", {
},
_mouseUp: function( event ) {
var allowed;
this._preparePosition( event );
allowed = this._trigger( "stop", event, this._uiHash() );
// If user stops propagation, leave helper there, disallow any CSS changes
if ( allowed === true ) {
if ( this._trigger( "stop", event, this._uiHash() ) === false ) {
this._setCss( event );
if ( this.options.helper ) {
this.dragEl.remove();
}
}
this.document.unbind( "." + this.widgetName );
if ( this.options.iframeFix === true ) {
this._unblockFrames();
}
this._unblockFrames();
},
// Uses event to determine new position of draggable, before any override from callbacks
@ -326,8 +291,8 @@ $.widget( "ui.draggable", {
}
this.dragEl.css({
left: newLeft + "px",
top: newTop + "px"
left: newLeft,
top: newTop
});
},
@ -337,26 +302,19 @@ $.widget( "ui.draggable", {
offset: this.offset
};
// TODO: should we always set the helper?
if ( this.options.helper ) {
ret.helper = this.dragEl;
}
return ret;
},
_unblockFrames: function() {
if ( !this.iframeBlocks || !this.iframeBlocks.length ) {
return;
if ( this.iframeBlocks ) {
this.iframeBlocks.remove();
delete this.iframeBlocks;
}
this.iframeBlocks.each( function() {
$(this).remove();
});
}
});