onClick event when expanding a node in the tree grid

Discontinued products Uncategorized discussions
#1

Is there an onClick event when clicking a plus sign to expand a node in the tree grid (using dynamic loading)? On a similar note, where can I find documentation on all of the onClick events for the grid/tree grid?



Thanks.

#2

You can use “onOpenStart” and “onOpenEnd” events. Please find more information about availible events here dhtmlx.com/docs/products/dhtmlxG … rid_api_ev

#3

I am using the onOpenStart() event but it is not giving me what I need.  I am trying to retrieve the number of rows in the grid after the node has been expanded.  When I print out the number of rows in the grid (gird.onRowsNum()) in the event, it’s the number of rows before the node got expanded.  Also, once I attached the event the node does not expand anymore?

#4

it’s the number of rows before the node got expanded
Yes, onOpenStart event occurs when opening initiated, but not started yet. You should use “onOpenEnd” event instead
>>Also, once I attached the event the node does not expand anymore
This event is blockable. If event returns: true - confirms opening/closing; false - denies opening/closing. So your code should looks like that:
grid.attachEvent(“onOpenStart”, function(id,state){
//your code here
return true;
});

#5


Using the onOpenEnd event doesn’t work for me because that only gets fired when the node is being closed.  I need an event that fires after the node has been expanded but before it is closed.  How can I do this?



Thank you.

#6

onOpenEnd event occurs when branch opened (in case of dyn. loading - after xml loading). This event passes the following parameters:
id - id of the node that will be opened/closed;
state - current open state of tree item; -1 means that the item is closed, 1 - item is opened.

So to detect if branch was opend and all row was loaded you should use:
grid.attachEvent(“onOpenEnd”, function(id,state){
if (state) {
//items is opend
}
if (!state) {
//items is closed
}
});

#7

When I attach the onOpenEnd event, it fires only when I try to collapse the expanded node, not when the node is expanded???

#8

Could you please provide us any kind of sample where we can reproduce this issue? (You can send such example directly to the support@dhtmlx.com)

#9


The following is the code for onOpenEnd().  Does it look correct?



this.attachEvent(“onOpenEnd”,function(id){
  this._redrawLines(id)
 });

#10

This code is correct. “this” should be reference to the dhmlxGrid object.