Hi,
geo wrote:
> Alexander,
>
> I noticed the problem in firebug (1.2.0) with Firefox 2.0.0.16 (cf.
> qooxdoo.png).
> Whenever I open a context menu, a new div appears on the page, but as
> soon as the menu disappears this "div" is hidden (display: none) and it
> does not removed.
Yes, for every menu widget (a context menu is technically the same) a
DIV element is created and is hidden whenever the menu disappears. Once
the menu is opened again the same (already rendered) DIV element is used
to let it re-appear. So the DIV element will stay inside the DOM for
performance issues - it is faster to show a already menu than to
re-create it over and over again.
> Then when I open a new context menu a new div is created in the page.
> The only difference between these div is the position left and top...
> After 10 menu display we have 10 new div which arise and so on.
>
> In my application I have only one context menu on a tree view,
> I even succeeded to display my menu 2 times in the same position, in
> this case I have two div totally identical on the page.
I wonder how you achieve this. The default behaviour of every menu
widget is to reuse its DIV element.
>
> I use qooxdoo 0.7.3 sdk.
>
> I hope this will help you else I can send you a copy of the code that I
> use.
Yepp, a little snippet of your code would help me to track down this
problem. However, I guess you are creating your contextmenu every time
somebody is right-clicking at your tree view, which will create a new
menu instance (and a new DIV element) of course. So instead of creating
every time a new one you have to reuse the already existing.
--snip--
// just a little example to show the reusing - don't know if it's
working completely
_contextmenu : null,
_createTree : function(){
myTreeView = new qx.ui.tree.Tree;
// "this" refers to the application context
myTreeView.addEventListener("contextmenu", this._showContextMenu, this);
...
},
_showContextMenu : function(e){
// if the contextmenu is not created
if (this._contextmenu == null)
{
this._contextmenu = new qx.ui.menu.Menu;
// menu details
}
// position the contextmenu using the event coords
this._contextmenu.setLeft(e.getScreenX() + 10);
this._contextmenu.setTop(e.getScreenY() + 10);
this._contextmenu.show();
}
--snip--
Hope this helps,
Alex
>
> Thanks.
>
>
> Alexander Back a écrit :
>> Hi,
>>
>> geo wrote:
>>> Hi,
>>>
>>> I found during using the contextual menu, that they are not deleted
>>> from the page but just hidden.
>>> Whenever you display a context menu that creates a new <div> in the
>>> page.
>>> Is there a way to avoid this?
>> qooxdoo widgets are tied to their DOM nodes. In the case of the
>> contextmenu the same DIV node is used, it is just hidden and displayed.
>> Are you sure you talking about the same DIV as used for the contextmenu?
>>
>> cheers,
>> Alex
>>
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