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Draggable: Don't cache parent offset if the parent position is fixed. Fixes #5009 - Draggable: scroll not working with parent's position fixed

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This commit is contained in:
Mike Sherov 2013-04-03 12:26:39 -04:00
parent a88d645140
commit 49c7b7200e
2 changed files with 37 additions and 2 deletions
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30
tests/unit/draggable/draggable_core.js
View File

@ -129,4 +129,34 @@ test( "#6258: not following mouse when scrolled and using overflow-y: scroll", f
});
});
test( "#5009: scroll not working with parent's position fixed", function() {
expect( 2 );
var startValue = 300,
element = $( "#draggable1" ).wrap( "<div id='wrapper' />" ).draggable({
drag: function() {
startValue += 100;
$( document ).scrollTop( startValue ).scrollLeft( startValue );
},
stop: function( event, ui ) {
equal( ui.position.left, 10, "left position is correct despite overflow on HTML" );
equal( ui.position.top, 10, "top position is correct despite overflow on HTML" );
$( document ).scrollTop( 0 ).scrollLeft( 0 );
}
}),
contentToForceScroll = $( "<div>" ).css({
height: "20000px",
width: "20000px"
});
$( "#qunit-fixture" ).append( contentToForceScroll );
$( "#wrapper" ).css( "position", "fixed" );
element.simulate( "drag", {
dx: 10,
dy: 10,
moves: 3
});
});
})( jQuery );

7
ui/jquery.ui.draggable.js vendored
View File

@ -127,6 +127,8 @@ $.widget("ui.draggable", $.ui.mouse, {
//Store the helper's css position
this.cssPosition = this.helper.css( "position" );
this.scrollParent = this.helper.scrollParent();
this.offsetParent = this.helper.offsetParent();
this.offsetParentCssPosition = this.offsetParent.css( "position" );
//The element's absolute position on the page minus margins
this.offset = this.positionAbs = this.element.offset();
@ -184,6 +186,10 @@ $.widget("ui.draggable", $.ui.mouse, {
},
_mouseDrag: function(event, noPropagation) {
// reset any necessary cached properties (see #5009)
if ( this.offsetParentCssPosition === "fixed" ) {
this.offset.parent = this._getParentOffset();
}
//Compute the helpers position
this.position = this._generatePosition(event);
@ -320,7 +326,6 @@ $.widget("ui.draggable", $.ui.mouse, {
_getParentOffset: function() {
//Get the offsetParent and cache its position
this.offsetParent = this.helper.offsetParent();
var po = this.offsetParent.offset();
// This is a special case where we need to modify a offset calculated on start, since the following happened: