mirror of
https://github.com/jquery/jquery-ui.git
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142 lines
4.4 KiB
HTML
142 lines
4.4 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>jQuery UI Draggable - Constrain movement</title>
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<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
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<script src="../../jquery-1.7.1.js"></script>
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<script src="../../ui/jquery.ui.core.js"></script>
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<script src="../../ui/jquery.ui.widget.js"></script>
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<script src="../../ui/jquery.ui.interaction.js"></script>
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<script src="../../ui/jquery.ui.draggable.js"></script>
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<link rel="stylesheet" href="../demos.css">
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<style>
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.draggable { width: 90px; height: 90px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
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#draggable, #draggable2 { margin-bottom:20px; }
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#draggable { cursor: n-resize; }
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#draggable2 { cursor: e-resize; }
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#containment-wrapper { width: 95%; height:150px; border:2px solid #ccc; padding: 10px; }
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</style>
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<script>
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$.ui.draggable.prototype.options.axis = null;
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$( document ).bind( "dragstart", function( event, ui ) {
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var axis,
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draggable = $( event.target ).data( "draggable" );
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if ( !draggable || !draggable.options.axis ) {
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return;
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}
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axis = draggable.options.axis;
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function drag( event, ui ) {
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if ( axis === "x" ) {
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ui.position.top = ui.startPosition.top;
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} else {
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ui.position.left = ui.startPosition.left;
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}
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}
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draggable.element
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.bind( "drag", drag )
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.one( "dragstop", function() {
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draggable.element.unbind( "drag", drag );
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});
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});
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$.ui.draggable.prototype.options.containment = null;
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$.ui.draggable.prototype._getContainment = function() {
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return this.options.containment === "parent" ?
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this.element.parent() :
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$( this.options.containment );
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};
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$( document ).bind( "dragstart", function( event, ui ) {
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var elem, container, offset, left, top, right, bottom,
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draggable = $( event.target ).data( "draggable" );
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if ( !draggable || !draggable.options.containment ) {
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return;
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}
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elem = ui.helper || draggable.element;
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container = draggable._getContainment();
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offset = container.offset();
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left = offset.left +
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(parseFloat( $.curCSS( container[0], "borderLeftWidth", true ) ) || 0) +
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(parseFloat( $.curCSS( container[0], "paddingLeft", true ) ) || 0);
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top = offset.top +
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(parseFloat( $.curCSS( container[0], "borderTopWidth", true ) ) || 0) +
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(parseFloat( $.curCSS( container[0], "paddingTop", true ) ) || 0);
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right = left + container.width();
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bottom = top + container.height();
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function drag( event, ui ) {
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var leftDiff = ui.startOffset.left - ui.startPosition.left,
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topDiff = ui.startOffset.top - ui.startPosition.top;
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ui.position.left = Math.max( ui.position.left, left - leftDiff );
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ui.position.left = Math.min( ui.position.left,
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right - elem.outerWidth() - leftDiff );
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ui.position.top = Math.max( ui.position.top, top - topDiff );
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ui.position.top = Math.min( ui.position.top,
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bottom - elem.outerHeight() - topDiff );
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}
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draggable.element
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.bind( "drag", drag )
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.one( "dragstop", function() {
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draggable.element.unbind( "drag", drag );
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});
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});
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$(function() {
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$( "#draggable" ).draggable({ axis: "y" });
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$( "#draggable2" ).draggable({ axis: "x" });
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$( "#draggable3" ).draggable({ containment: "#containment-wrapper" });
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$( "#draggable4" ).draggable({ containment: "#demo-frame" });
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$( "#draggable5" ).draggable({ containment: "parent" });
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});
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</script>
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</head>
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<body>
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<div class="demo">
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<h3 class="docs">Constrain movement along an axis:</h3>
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<div id="draggable" class="draggable ui-widget-content">
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<p>I can be dragged only vertically</p>
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</div>
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<div id="draggable2" class="draggable ui-widget-content">
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<p>I can be dragged only horizontally</p>
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</div>
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<h3 class="docs">Or to within another DOM element:</h3>
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<div id="containment-wrapper">
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<div id="draggable3" class="draggable ui-widget-content">
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<p>I'm contained within the box</p>
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</div>
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<div id="draggable4" class="draggable ui-widget-content">
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<p>I'm contained within the box's parent</p>
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</div>
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<div class="draggable ui-widget-content">
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<p id="draggable5" class="ui-widget-header">I'm contained within my parent</p>
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</div>
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</div>
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</div><!-- End demo -->
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<div class="demo-description">
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<p>Constrain the movement of each draggable by defining the boundaries of the draggable area. Set the <code>axis</code> option to limit the draggable's path to the x- or y-axis, or use the <code>containment</code> option to specify a parent DOM element or a jQuery selector, like 'document.'</p>
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</div><!-- End demo-description -->
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</body>
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</html>
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