help with tree view control

[frankbicknell]

I would like to start using the tree view control.
I have watched the videos and worked with the examples and I can make that work OK.
I can't figure out how to get dynamic data from linked mysql tables into any usable form.

This is what I would like to have

>Smith Bob - Customer parent level
>>Jobs - Jobs Child level
Job a
Job b
>>Work Orders - Work orders child level
123
124
125
>>Invoices - Invoices child level
234
235
236
>>Estimates - Estimates child level.
345
346
347

I can create the fixed Parent and child levels but I can't get the related child dynamic data levels to work.

Is there a way to do this without looping through all of the tables to build this structure?
I think that having to loop through the parent and child table would take too long to render.

[Steve Workings]

Re: help with tree view control

The JSON and the tree control are pretty efficient. Part of the answer to your concern, as always, is how many branches and child records for each.

How about a view as a single data source to produce the JSON?

[frankbicknell]

Re: help with tree view control

I have created several views with different configurations. I guess I just need to practice more because it is just not sinking in for me.

Has anyone used the jTree jquery pugin? It looks like that may be easier to configure.

[frankbicknell]

Re: help with tree view control

OK I am getting somewhere now.

I am looping through the tables and building the tree view control using xbasic. It is slow but it's a start.

I am stuck now on figuring out how to include an onclick event that will open a ux to edit the appropriate record.

this is what I have which opens the ux but to a blank record. I need to either set some session variable or arguments in the ux. Any ideas?

txt = txt + chr(9) + chr(9) + chr(9) +  rsc1.Data(1)+"{icon: 'myIcon1', onClick: '{dialog.object}.runAction(\'open_work_order_edit\')'}"+crlf()

[Steve Workings]

Re: help with tree view control

See if what I'm doing is of any help. I have Locations (L) and Animals (A). Each Group is a group of pools and animals, so the Medical Care group might have two pools and three animals currently residing. I found the button click event to be handy because it easily returns the value of the tree element and shows the UX I need for the user choice.

			
while flag .and. rs.data("Group_Number") = Current_Group

	' Sub-loop for all locations and pools in current group:
	' Child:
	ele_value = "G|" + rs.data("Group_Number") + "|" + rs.data("Type") + "|" + rs.data("Value")		'example: G|1|L|3
	*concat(js, "	{" + crlf())
	*concat(js, "		html: '" + rs.data("element_name") + "'," + crlf())
	*concat(js, "		value: '" + ele_value + "'," + crlf())
	if rs.data("Type") = "L"
		*concat(js, "		icon: '" + img_location + "'," + crlf())
	else
		*concat(js, "		icon: '" + img_animal + "'," + crlf())
	end if
	*concat(js, "		onClick: function() {{dialog.object}.buttonClick('BUTTON_CLICKTREE'); }" + crlf())

	flag = rs.nextRow()

	' Another child in same group, or end of children for this group:
	if flag = .t. .and. rs.data("Group_Number") = Current_Group
		*concat(js, "	}," + crlf())
	else
		*concat(js, "	}" + crlf())
		*concat(js, "]" + crlf())
	end if
end while

[frankbicknell]

Re: help with tree view control

Thanks Steve. I will experiment with your method... but for now

I have muddled through and got this to work. (believe it or not).

I am doing a callback in the onclick event.

In the callback I can get the entire tree branch of the row I click in the e.V.R1.TREE1 pointer.
Then I am taking the right 7 characters which is the work order number..
followed by a sql_lookup to get the id of the work order to which I set a session variable...
then in the action javascript that opens the edit ux I am using the 'Populate ux component with data from a table' set to the id session variable.
The ux opens with the correct record.

I have tried to submit the id which I am getting in the resultset for that child branch but I am getting an error that I cannot figure out when I include the parameters to submit the extra data in the callback. I can't seem to parse the javascript correctly. If I could do this I would not have to do a sql lookup in the callback.

Doing it without being able to submit the id with the callback will get more complicated when I try to dress up the tree branch with more useful information Like work Order No and Date and Status, etc.

There has got to be a better way. It certainly seems like all or most can be done client side.

Here is the line in the xbasic from the treeview control that does the callback

txt = txt + chr(9) + chr(9) + chr(9) + chr(9) + rsc1.Data(1) + "{icon: 'myIcon1', onClick: '{dialog.object}.ajaxCallback(\'\',\'\',\'xbSetSessionVars\');'}" + crlf()

here is the callback

function xbSetSessionVars as c (e as p)
dim args as sql::arguments
connection = "::name::???????"
args.set("maWoNo",right(e.V.R1.TREE1,7))
table = "???????"
filter = "logno = :maWoNo"
result_expression = "slid"
session.snSlID = sql_lookup(connection,table,filter,result_expression,args)
xbSetSessionVars = "{dialog.object}.runAction('open_work_order_edit');"
end function

[frankbicknell]

Re: help with tree view control

I finally got the extra data parsed out so I don't have to do a sql lookup in the callback. I can dress up my branches in a view as long as I include the id in the resultset. It is actually working pretty smoothly.

[frankbicknell]

Re: help with tree view control

Anyone know how to programmatically open the first node?

[Steve Workings]

Re: help with tree view control

I don't know on this one. I'd like to be recording the last open/closed state of each node and bring it back to the user in exactly that same state. But it's not been a priority yet.

[frankbicknell]

Re: help with tree view control

After fiddling with this for a couple of days this is what I have come up with.

It is still awkward in that I have to refresh the entire tree if I add or delete a record, which closes all of the nodes and goes back to the beginning.

I have found in another thread that some have gotten jsTree plugin working. This may be more flexible as far as inserting and removing nodes without having to refresh the entire tree.

All in all I like the way it works for navigating through the records and my users like it too.

2016-02-01_13-42-51.png

[Steve Workings]

Re: help with tree view control

Yeah, the control is terrific once ya figure it out. I, too, would like to be able to add, move or remove a leaf without having to refresh the whole thing, esp. since I haven't found a way to maintain the open/closed state of each branch.

[Michael1954]

Re: help with tree view control

If you use the genie you see that "expand" is used.
Closed is the default.


[
{
html: 'One',
expanded: true,
children: [
{
html: 'One Child'
}
]
}
]

Obviously you can manipulate the JSON with a list and save it to local storage. I have only played with the control for a day but I think it is relatively easy to build a dynamic list builder and allow customers to edit it.

Michael

[Davidk]

Re: help with tree view control

The Tree control is an Unordered List with it's main nodes being List Items. Each List Item can have an Unordered List of List Items, etc... which is where we get our expanding branches.

Alpha shows and hides the Items of a Branch by controlling the Display Style property. So... we can do the same.

This will expand the first branch of a tree...

var trNode = $('{dialog.ComponentName}.V.R1.TREE1.CONTROL.0').childNodes;
trNode[1].style.display = "block";

Going further, since you want to open/close a specific branch, then you'd know something about that branch and could search for it.
Having opened a specific branch, you could save the ids of those opened branches in order to come back later and re-open them automatically.

[frankbicknell]

Re: help with tree view control

Thank you David, That gives me some things to work with.

Michael I am building my tree using the a5_treeTextToJSON() function. I may be able to modify the json at some point. The tree view control is all new to me.

[frankbicknell]

Re: help with tree view control

Thanks again David.

I need to figure out the correct nomenclature for the tree object but here goes.
When I add or delete or make changes to the dynamic data the the tree is composed of I call a refresh function that re-opens the node that that I was working with. This makes this control near perfect.
Now I have to figure out how to re-select a 'leaf' whose data I have changed after I refresh the tree.