Tree "Expand All" taking too much time for a large tree

[Pronab Bhattacharyya]

Hi All,
I am facing  a problem with dojo tree.
The requirement is to display a dojo tree as default expanded and also user can click on "Expand All" which will alow the tree to expand.
For both these activities I am using a  java script function:

 function expandAllNode()
 {
 var treeObj = dijit.byId('mytree');
       
 var children = treeObj.rootNode.getChildren();
 expandChildNode(children, treeObj);

 }

 function expandChildNode(children, treeObj)
 {
 for (var i = 0; i < children.length; i++)
 {
 var node = children[i];
 if (node.isExpandable && !node.isExpanded)
 {
 treeObj._expandNode(node);
 }

 var childNodes = node.getChildren();
 if (childNodes.length > 0)
 {
 expandChildNode(childNodes, treeObj);
 }
 }
 }        
Now for auto expand I am calling it by  
dojo.addOnLoad(function(){
               
                timer = setTimeout("expandAllNode()",1000);
                highlightNode();
                               
        });

Problem:  The problem is If the tree is too large it will not being  expanded by default within 1000 millisecond.
Also if the  tree is too small first it showing in collapse mode the its expanding after a bit of second.
Also for a big tree Expand All is taking too much time (some times may be more 1 min have to wait for Expand All)

Can you please help me by providing a robus sollution which will  allow me to auto expand as well as Expand All.

regards
Pronab

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[Kurz Wolfgang]

Hello everyone,

I am using the dijit.Editor and its working great in FF and Opera but in IE7 I get a 404 error inside the editing area.

I am not sure whats wrong cause I remember it working last year when I tried it.

Anyone know what could cause this?

Thx a lot in advance!


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[Dustin Machi-3]

In general this is just never going to work well.  Trees in general are not all that great of an interface...especially in the web.  Leaving that aside though,  the expand all function is always going to be slow as it has to render a lot of complex html aside from retrieving the data.  Hundreds of nodes being added like this is slow.  Anyway, one of the points of the system is to use a dojo.data store that can lazily load the data from the server and render what is needed as needed.  Expand all forces all that to happen at once.  I don't expect that you will find a solution that really does expand all.  In the past, I've generally expanded the top level and then expanded below that as necessary.

Dustin

On Jan 9, 2009, at 5:53 AM, Pronab Bhattacharyya wrote:

Hi All,
I am facing  a problem with dojo tree.
The requirement is to display a dojo tree as default expanded and also user can click on "Expand All" which will alow the tree to expand.
For both these activities I am using a  java script function:

 function expandAllNode()
 {
 var treeObj = dijit.byId('mytree');
       
 var children = treeObj.rootNode.getChildren();
 expandChildNode(children, treeObj);

 }

 function expandChildNode(children, treeObj)
 {
 for (var i = 0; i < children.length; i++)
 {
 var node = children[i];
 if (node.isExpandable && !node.isExpanded)
 {
 treeObj._expandNode(node);
 }

 var childNodes = node.getChildren();
 if (childNodes.length > 0)
 {
 expandChildNode(childNodes, treeObj);
 }
 }
 }        
Now for auto expand I am calling it by  
dojo.addOnLoad(function(){
               
                timer = setTimeout("expandAllNode()",1000);
                highlightNode();
                               
        });

Problem:  The problem is If the tree is too large it will not being  expanded by default within 1000 millisecond.
Also if the  tree is too small first it showing in collapse mode the its expanding after a bit of second.
Also for a big tree Expand All is taking too much time (some times may be more 1 min have to wait for Expand All)

Can you please help me by providing a robus sollution which will  allow me to auto expand as well as Expand All.

regards
Pronab

=====-----=====-----=====
Notice: The information contained in this e-mail
message and/or attachments to it may contain 
confidential or privileged information. If you are 
not the intended recipient, any dissemination, use, 
review, distribution, printing or copying of the 
information contained in this e-mail message 
and/or attachments to it are strictly prohibited. If 
you have received this communication in error, 
please notify us by reply e-mail or telephone and 
immediately and permanently delete the message 
and any attachments. Thank you

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[V S P]

what version of dojo?

On Fri, 9 Jan 2009 15:54:43 +0100, "Kurz Wolfgang"
<wolfgang.kurz@...> said:

> Hello everyone,
>
> I am using the dijit.Editor and its working great in FF and Opera but in
> IE7 I get a 404 error inside the editing area.
>
> I am not sure whats wrong cause I remember it working last year when I
> tried it.
>
> Anyone know what could cause this?
>
> Thx a lot in advance!
>

--
  V S P
  toreason@...

--
http://www.fastmail.fm - mmm... Fastmail...

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[salilgaikwad]

I am expanding Dojo tree using above method and it working fine in both Mozilla and IE.My problem is that when i click on Expand All Button my controller method is called again and my page is reloading. How to avoid it Page Reloading. I am using rails 2.0 and dojo 2.1.

Thanks
Salil
www.cipher-tech.com

Dustin Machi-3 wrote:

In general this is just never going to work well.  Trees in general  
are not all that great of an interface...especially in the web.  
Leaving that aside though,  the expand all function is always going to  
be slow as it has to render a lot of complex html aside from  
retrieving the data.  Hundreds of nodes being added like this is  
slow.  Anyway, one of the points of the system is to use a dojo.data  
store that can lazily load the data from the server and render what is  
needed as needed.  Expand all forces all that to happen at once.  I  
don't expect that you will find a solution that really does expand  
all.  In the past, I've generally expanded the top level and then  
expanded below that as necessary.

Dustin

On Jan 9, 2009, at 5:53 AM, Pronab Bhattacharyya wrote:

>
> Hi All,
> I am facing  a problem with dojo tree.
> The requirement is to display a dojo tree as default expanded and  
> also user can click on "Expand All" which will alow the tree to  
> expand.
> For both these activities I am using a  java script function:
>
>  function expandAllNode()
>  {
>  var treeObj = dijit.byId('mytree');
>
>  var children = treeObj.rootNode.getChildren();
>  expandChildNode(children, treeObj);
>
>  }
>
>  function expandChildNode(children, treeObj)
>  {
>  for (var i = 0; i < children.length; i++)
>  {
>  var node = children[i];
>  if (node.isExpandable && !node.isExpanded)
>  {
>  treeObj._expandNode(node);
>  }
>
>  var childNodes = node.getChildren();
>  if (childNodes.length > 0)
>  {
>  expandChildNode(childNodes, treeObj);
>  }
>  }
>  }
> Now for auto expand I am calling it by
> dojo.addOnLoad(function(){
>
>                 timer = setTimeout("expandAllNode()",1000);
>                 highlightNode();
>
>         });
>
> Problem:  The problem is If the tree is too large it will not being  
> expanded by default within 1000 millisecond.
> Also if the  tree is too small first it showing in collapse mode the  
> its expanding after a bit of second.
> Also for a big tree Expand All is taking too much time (some times  
> may be more 1 min have to wait for Expand All)
>
> Can you please help me by providing a robus sollution which will  
> allow me to auto expand as well as Expand All.
>
> regards
> Pronab
>
>
>
> =====-----=====-----=====
> Notice: The information contained in this e-mail
> message and/or attachments to it may contain
> confidential or privileged information. If you are
> not the intended recipient, any dissemination, use,
> review, distribution, printing or copying of the
> information contained in this e-mail message
> and/or attachments to it are strictly prohibited. If
> you have received this communication in error,
> please notify us by reply e-mail or telephone and
> immediately and permanently delete the message
> and any attachments. Thank you
>
>
> _______________________________________________
> FAQ: http://dojotoolkit.org/support/faq
> Book: http://dojotoolkit.org/docs/book
> Forums: http://dojotoolkit.org/forum
> [e-mail]
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