我有一个dojox.layout.FloatingPane(作为自定义dijit),它可以放置在其封闭div中的任何位置.我的问题是用户可能会将FloatingPane完全拖到其容器之外并且无法检索它.有没有简单的方法可以强制FloatingPane始终保持完全可见?
这是我的代码:
dojo.provide("ne.trim.dijits.SearchDialog"); dojo.require("dijit._Widget"); dojo.require("dijit._Templated"); dojo.require("dojox.layout.FloatingPane"); dojo.declare("ne.trim.dijits.SearchDialog",[dijit._Widget,dijit._Templated],{ templateString: dojo.cache("ne.trim.dijits","templates/SearchDialog.html"),initialised:false,floatingPane: null,postCreate: function() { this.init(); },init: function() { console.debug("SearchDialog.init()","start"); if ( this.initialised === false ) { this.createSearchDialog(); } //ne.trim.AppGlobals.searchDialog = this; console.debug("SearchDialog.init()","end"); },createSearchDialog: function() { var node = dojo.byId('searchBox'); floatingPane = new dojox.layout.FloatingPane({ title: "A floating pane",resizable: true,dockable: true,constrainToContainer: true,style: "position:absolute;top:100;right:100;width:400px;height:300px;z-index:100",},node ); this.initialised=true; floatingPane.startup(); } });
首先,请参阅jsFiddle的工作示例:
http://jsfiddle.net/phusick/3vTXW/
现在有一些解释;)FloatingPane的DnD功能是通过在窗格的postCreate方法中实例化的dojo.dnd.Moveable类实现的.要限制FloatingPane的移动,您应该使用其中一个moveable:
> dojo.dnd.parentConstainedMoveable – 由DOM节点约束
> dojo.dnd.BoxConstrainedMoveable – 通过坐标约束:{l:10,t:10,w:100,h:100}
> dojo.dnd.constrainedMoveable – 通过在提供的函数中计算的坐标来约束
有关详细信息,请参阅上述jsFiddle.
根据文档,您应该在Moveable实例上调用destroy()来删除它,但由于FloatingPane的原始Moveable未分配给任何对象属性,我不会销毁它,我只是在同一个DOM节点上实例化这三个移动中的一个子类:
var ConstrainedFloatingPane = dojo.declare(dojox.layout.FloatingPane,{ postCreate: function() { this.inherited(arguments); this.moveable = new dojo.dnd.move.constrainedMoveable(this.domNode,{ handle: this.focusNode,constraints: function() { return dojo.coords(dojo.body()); } }); } });
现在您可以使用ConstainedFloatingPane而不是dojox.layout.FloatingPane:
var floatingPane = new ConstrainedFloatingPane({ title: "A Constrained Floating Pane",resizable: true },searchBoxNode);