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jqgrid 4 Adjacency Model expanded_field problem

Tags: tree expanded

23/04/2011
11:56

eai

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Hello

I am testing jqgrid 4

I try to use tree mode with Adjacency Model.

Grid loads tree successfull, but ignore expanded_field.

My code does work with jqgrid version 3.6 jQuery 1.3.2

I use jquery 1.5.1 with jqgrid 4

Looks like it is a bug.

Evgeny

26/04/2011
20:14

OlegK

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I had close problem. To solve it I have to set loaded:true property for all nodes having expanded:true.

Look at the demo.

Best regards
Oleg

28/04/2011
08:45

eai

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Demo does work well

Looks like I have to use JSON instead XML

Thanks a lot

03/05/2011
12:27

OlegK

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Hi!

I personally prefer to use JSON instead of XML if it is possible, but you can do the same also with XML data. Look at the answer on the stackoverflow.com which I recently wrote. Probably it explain the problems which you has.

Best regards
Oleg

03/05/2011
12:38

eai

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Thank you Oleg,

I like JSON too.

Really I use XML for Tree only because it does not work with JSON.

Maybe be I do not use tree and JSON right way, but I do not have any correct example with tree and JSON yet

Best Regards

Evgeny

P.S.

You correction with "loaded=true" does work good with XML too.

03/05/2011
19:01

greyblue

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Thank you very much, i had the same problem.

Any idea why this value "loaded" is now needed?

03/05/2011
20:10

OlegK

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Because of the line 67 of the file grid.treegrid.js:

ldat[expanded]=((ldat[expanded]=="true"||ldat[expanded]===true)?true:false) && ldat[loaded];
if(ldat[expanded] === true) {
twrap += $t.p.treeIcons.minus+" tree-minus treeclick'";
} else {
twrap += $t.p.treeIcons.plus+" tree-plus treeclick'";
}

If the row of data (ldat) not contain the loaded property, the construct ldat[loaded] will be equal to undefined. The expression true && undefined is equal to undefined. On the other side false && undefined is equal to false. So strange is JavaScript!

Thus in case of undefined loaded prioperty the value of ldat[expanded] will be set either to undefined or to false and never to true. So the node will not expanded in case of undefined loaded prioperty.

The code fragent which I described above is new in tree grid 4.0. So same code which run under jqGrid 3.8.2 and expanded some nodes could not expand the same node in jqGrid 4.0.

If one would change the code of jqGrid so that one would test

if(ldat[expanded] === false) {
twrap += $t.p.treeIcons.plus+" tree-plus treeclick'";
} else {
twrap += $t.p.treeIcons.minus+" tree-minus treeclick'";
}

instead of

if(ldat[expanded] === true) {
...

the problem will also fixed.

Best regards
Oleg

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