两个 ICEfaces 面板交互定位
如何限制 PanelPositioned 的元素，使其只能在当前面板内拖动？我有两个不同数据类型的垂直列表，一个在另一个之上。两者都使用 PanelPositioned 来允许拖动和拖动。删除重新排序，但可以将元素上下拖动到另一个面板，从而生成错误
<ice:panelPositioned id="dragPanel1" var="dataType1var"
value="#{displayBean.dataType1List}" constraint="vertical">
<ice:panelGroup style="cursor:move;">
</ice:panelGroup>
</ice:panelPositioned>
<ice:panelPositioned id="dragPanel2" var="dataType2var"
value="#{displayBean.dataType2List}" constraint="vertical">
<ice:panelGroup style="cursor:move;">
</ice:panelGroup>
</ice:panelPositioned>
How do you constrain the elements of a PanelPositioned so they can only be dragged within the current panel? I have two vertical lists of different data types, one above the other. Both use a PanelPositioned to allow drag & drop reordering, but the elements can be dragged up and down to the other panel, generating an error
<ice:panelPositioned id="dragPanel1" var="dataType1var"
value="#{displayBean.dataType1List}" constraint="vertical">
<ice:panelGroup style="cursor:move;">
</ice:panelGroup>
</ice:panelPositioned>
<ice:panelPositioned id="dragPanel2" var="dataType2var"
value="#{displayBean.dataType2List}" constraint="vertical">
<ice:panelGroup style="cursor:move;">
</ice:panelGroup>
</ice:panelPositioned>
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对于icefaces 3.0，将
beforeChangeListener添加到ice:panelPositioned元素。如果event.getType() !=为PanelPositionedEvent。TYPE_MOVE，则此侦听器应调用event.cancel()> 并且event.getIndex()和event.getOldIndex()都大于 1。如果是移动，则它在面板内。添加/删除正在面板之间移动。对于icefaces 1.8.2（从未使用过2.0），您需要向
ice:panelPositioned元素添加一个侦听器。没有beforeChangeListener。您将需要一份之前的清单和当前的清单（两份）。初始化支持 bean 时，两者都初始化为相同的元素。侦听器，如果移动 - 将之前列表设置为当前列表，否则将当前列表设置为之前列表。必须是副本，而不是参考。For icefaces 3.0, add a
beforeChangeListenerto theice:panelPositionedelement. This listener should then callevent.cancel()if theevent.getType() !=toPanelPositionedEvent.TYPE_MOVEand theevent.getIndex()andevent.getOldIndex()are both greater than 1. If it is a move, then it is within panel. add/delete are moving between panels.For icefaces 1.8.2 (neve used 2.0), you would need to add a listener to the
ice:panelPositionedelement. There is nobeforeChangeListener. you will need a before list and current list (two copies). Both initialize to same elements when initializing backing bean. The listener, if a move - set before list to current list otherwise set current list to before list. Must be a copy, not a reference.