Start Building Professional
Web Apps Today

Drag and Drop Question

Hi,

we are dragging from a treegrid to a treegrid.

the first tree grid has several levels of folders and each folder has various leaves in. when they drag to a folder in the second treegrid we dont want it to add all the folders that are dragged but just the leaves into the folder. here is an example of what i mean:

in the first grid we have the following folders and laves

folder 1
folder 1a
item 1
item 2
folder 1b
item 3
item 4

in the second grid we have:

folder a
folder b

if they drag folder folder 1 from the first tree into folder a in the second tree it appears as:

folder a
folder 1
folder 1a
item 1
item 2
folder 1b
item 3
item 4
folder b

which is fine but we want it to take out all folders when it is dragged into the second grid and only place the leaves in there as follows:

folder a
item 1
item 2
item 3
item 4
folder b

we realise that this is something specific to our project but was wondering if there was an easy way to do this

thanks

The most simple approach is to use onDrag event to catch data about moved elements, block d-n-d by returning false from event, and manually move necessary rows by moveRow command ( which can move row between grids as well )
Of course it also possible to achieve same effect with modification of existing code, but it will be a complex one.

Hi

we have tried to do this manually except we are having a problem with the idfrom array that is being passed. if a folder gets dragged only the folder id is passed but not its contents ids. we need its contents ids so we can search through gthem to see what are folders and what are leaves.

when a folder with contents is dragged how can we set it to pass over all the items that is trying to be dragged

thanks

also we noticed that mygrid.getRowsNum() only returns the number of tree items that are visible, the contents of a tree which have a closed folder and are therefore not visible are not counted, is this a bug? if not how do we get round it? if this isnt a bug we would suggest having to methods: mygrid.getVisibleRowsNum() and mygrid.getTotalRowsNum()

thanks

Please can you tell us why you have not answered this question when we asked it nearly a week ago. In my question named response times you stated as long as i ask a question from 9-6 mon to fri we would get a reply. you are replying to others so this seems very strange. we have asked a few questions in this time and none of them have been answered??

>>when a folder with contents is dragged how can we set it to pass over all the items that is trying to be dragged
It can be done with small code modification, but I think existing code already allow similar functionality, which can be done in next manner

targetGrid.attachEvent("onDrag",function(sid, tid, sgrid, tgrid){
    var ids=sid.split(","); //convert to array
    for (...){
        var childs=sgrid.getSubItems(ids[i]); //get child items IDs
       childs=childs.split(","); //convert to array
       //here we have IDs of child items
    }
});

>>also we noticed that mygrid.getRowsNum() only returns the number of tree items that are visible, the contents of a tree which have a closed folder
This is expected behavior, existing functionality nested from plain grid, so may be not so usefull in case of treeGrid ( in both cases it returns count of visible|operable rows )
If you need functionality for counting all rows in TreeGrid you can use next workaround.

var total=0;
grid.forEachRow(function(){ total++; });

>>Please can you tell us why you have not answered this question when we asked it nearly a week ago
Sorry for inconvenience, somehow we just missed your question.

Thanks very much, we really appreciate your answers

richard