Clearing select list

TS 6.7.1 Win 2003

I have a select list I want to clear, it is defined as required and not multi select.

If I run

IWDatacapture.getItem("/Root/List").setValue(7);
IWDatacapture.redraw();

it selects that one fine. However if I run:

IWDatacapture.getItem("/Root/List").setValue();
IWDatacapture.redraw()

Nothing happens, the previous selection is still set. Putting a 0 in there selects the first one.

I am assuming it is a bug, but can anyone point an obvious mistake ? I guess I wil need to read the options and reset them (pain).

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Comments

nipper

OK, So I thought I had made a stupid mistake, but no it is not working. It will change the selection from 5 to 2 to 0 but will not clear the selection.

Here is a code snippet.

[html]

List

[/html]

Associated JS



IWEventRegistry.addFormHandler("onFormInit", init); 


function init() {

    IWEventRegistry.addItemHandler("/Root/List", "onItemChange", clearList);
} 


function clearList(item){

alert("Set to 5");
IWDatacapture.getItem("/Root/List").setValue(5);

alert("Set to 2");
IWDatacapture.getItem("/Root/List").setValue(2);

alert("Clear");
IWDatacapture.getItem("/Root/List").setValue();

alert("item Set to 5");
item.setValue(5);

alert("item Set to 2");
item.setValue(2);

alert("item Clear");
item.setValue();
}

From reading the manual, it appears that the functionality where you could call setValue with an empty call will clear the selections is now gone. I do not know if that was ever a published way of doing things or just happened to work before.

:-(

Andy

Johnny

Have you tried .setValue(null) - Worth a shot I guess.

nipper

Same thing. I just did a loop to read the selections, remove and add them again. I would file a bug but it is not documented that it is supposed to work (even though it used to) so it would really be an enhancement.

Adam Stoller

Same thing. I just did a loop to read the selections, remove and add them again. I would file a bug but it is not documented that it is supposed to work (even though it used to) so it would really be an enhancement.

While it seems to me it should work too - but in the meantime - I think you can accomplish what you want with a bit of basic JavaScript coding - looping through the list of options searching for the one which has the selected attribute set and unset it. I don't have specific code for this, but I can't imaging it's that difficult (with some w3c.org website assistance anyway)

nipper

True, I did a slightly more brute force method & it works. But I have seen a number of posts, I assume from teh 6.5 era, that say setValue() will clear selections. That certainly does not work (now). I expect that was an undocumented feature that no longer exists. Too bad.

Frederik

I realize this is a very dead thread, but I stumbled on it while looking for something else (*). I noticed this has an open ending so far.

In TS 6.5, I found out you can unset a single select Item with Item.setValue(-1). It's not documented, which I find to be very peculiar, as unsetting a field is a common action.

In fact, looking at the code at

iw-home/httpd/webapps/content_center/formspub/dcapi_item.js:function iwItem_setValue(value)

, I'm thinking any out-of-range number would unset the select field. Not tested.

(*) Probably of little interest here, but I was looking for discussions on advanced selection lists (using 2 multiselect fields with << and >> buttons), as in this and
this thread.

nipper

Hey F.

I have done that a few times, ping me off line and I can point you in the right direction.

Vishakha

Did anybody figure out the solution for this?
The ITEM.setValue(-1) does not work for TS 6.7
Please help if somebody already has found a way out of it...

rohitspathak123

Hi

I have the same requirement in TS 6.1 . I have a multi select list box. How do i reset the selected value in the listbox.

IWDatacapture.getItem("/Territory/TerritoryList").setValue();

IWDatacapture.getItem("/Territory/TerritoryList").setValue(-1);

Nothing is working.

Rohit

Adam Stoller

Hi

I have the same requirement in TS 6.1 . I have a multi select list box. How do i reset the selected value in the listbox.

IWDatacapture.getItem("/Territory/TerritoryList").setValue();

IWDatacapture.getItem("/Territory/TerritoryList").setValue(-1);

Nothing is working.

Rohit

I believe you need to do it through more official channels - something like (unverified):

var ops = IWDatacapture.getItem("/Territory/TerritoryList").getOptions();
for (i = 0; i < ops.length; i++) {
    if (ops.value != "all") {
        ops.selected = false;
    }
}
IWDatacature.getItem("/Territory/TerritoryList").setOptions(ops);

Migrateduser

similar to what ghoti suggested, i use this system wide so I dont need to care what type of field it is i am trying to clear

[html]/**
* Function: clearSetValue
*
* Description: generic function to clear the values that have been set in an item.
* specifically useful for dropdown/select/radio/checkboxes.
*
* Parameters:
* item - IWITEM -- IWDatacapture.getItem("some/path/here")
*
* Return value: none
*/

function clearSetValue(item)
{
if(item.isVisualFormat()){

} else {
var optList = item.getOptions();
if(optList != null){
for (var i = 0; i<optList.length; i++) {
optList.selected = false;
}
item.setOptions(optList);
} else {
item.setValue("");
}
}
}[/html]

Frederik

that's a nice bit of code, but it really shouldn't be that difficult!

There is a direct call to unset any field


  textItem.setValue("") ; 
  browserItem.setValue("") ; 
  multiselectItem.setValue([]); // empty array
  singleselect.setValue ... DUH?

So please somebody make a Bug or Feature request.

Duh, It'll be just 2 minutes to do it myself...

PS: I mailed to Support, asked for a Bug / FR to be created. Unfortunately I will be out of office for next several days, so I'm not sure I'll be able to post the Bug / FR number soon.

Frederik

I have access to a TS 6.7.2_patch2 Windows install, and checked again the dcapi_item.js file that I looked at before in TS 6.5 (see my post from 12 May 2008 in this thread)

the file moved to iw-home\httpd\webapps\content_center\datacapture\dcapi_item.js

and yeah, they added strict value checking on the inputs, which wasn't there in 6.5

                // Single select. Is input a single integer in range?
                var inputValid = (typeof value == "number" &&
                                  value >= 0 && 
                                  value < internal.options.length);

This makes the previous, undocumented workaround setValue(-1), impossible...
From that code, I would conclude there is no way to use setValue() to unset a single-select list. For now, you must go through the getOptions workaround. Sadly.

Vishakha

I think I came across this solution in Devnet itself.
Use set options to reset the values of the select box.
1. Read the existing values of the select box
2. Form the options array for these and set the selected attribute as false
3. Use setoptions method to set the options on the select box

Below is the function that we coded :

//function to reset dropdown box
function unselect(itemObj){

var optionsArr=new Array();
itemOptionsArr = itemObj.getOptions();
for (var j=0; j< itemOptionsArr.length;j++ ){
itemOptionsArr.selected =false;
}// end of : for (var j=0; j< itemOptions.length;j++ ){
itemObj.setOptions(optionsArr);

}// end of function unselect(itemObj){

Hope this helps !!

ramona1

Thank you Vishakha

KhushiAgrawal

Hi All,

I am searching for the same thing and I have implemented the same as Vishakha has suggested, but can anyone tell me how I can stop clearing that lable I just want to de-select that value but not getting any clue.
In my attached code I am calling my Js function on a clear button, for more information please find attachment of code.

Thank you.

KhushiAgrawal

Hi All,

I got it now Please ignore the above Quire.

Thanks