Hi,
geo wrote:
> Alexander.
>
> you're right I create the menu each time, the items of my trees are
> customized. So each menu is different.
Completely different? If not, you can create a pool of contextmenus and
reuse them.
> Thanks for your help, but just one question is there a way to remove
> each time the custom menu from the page when it disappear?
You can remove every widget from the document by calling the "remove"
method. This will also remove the connected DOM node from the document.
--snip--
this._contextmenu = new qx.ui.menu.Menu();
// add - this refers to the application context
this.add(this._contextmenu);
// remove
this.remove(this._contextmenu);
--snip--
cheers,
Alex
>
> Thanks ...
>
> Regards
>
> Alexander Back a écrit :
>> 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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