Use group tag with colspan attribute around your fields.

I can use it in odoo9. I also use min-width to limit the minimum size of the width.

.my_class [data-id="apply_subject"] {

    width:330px !important;

    min-width: 130px !important;

}

Hi,

I was facing this problem and I finally found the solution to customize a column in TREE view, only for ONE view ;

Solution 1 that doesn't work :

• xml <field width="200" /> or <field style="width: 200" /> or <field style="width: 30 %%" />

--> width attribute doesn't seem to work in tree view ;

Solution 2 that doesn't work :

• xml <field class="my_class" /> ;
• css .my_class { width: 1000px;}

--> class attribute doesn't seem to work in tree view ;

Solution 3 that doesn't work :

• xml : <field name="my_field" />
• css : [data-id="my_field"]{width: 1000px;}

--> this works for ALL the column named "my_field". Not very good if we want to change the render of a column if the field is "name" ;

The workaround I found

• xml : <tree string="Tree String" version="7.0" class="my_class"> <field name="my_field" />
• css : .my_class [data-id="my_field"]{width: 1000px;}

--> class attribute works on tree tag.

-->To be sure to target only the desired view the name of my class is "myModuleName__myTreeViewName"

Thanks for your feedback.

one thing I found in V14 is that if you define a string value to a field in the XML the minimum width is set based on that string value rather than autosizing.Note that any leading or trailing spaces are trimmed -  someone could try a non-viewable character and see if that works.

Hard to believe this issue was opened in 2013 and still open

This works for me in v.14

xml: tree class="my_class"

css: .my_class {column-width: XXpx;}

Hi I was facing the same problem and apparently in Odoo v16.

It is possible to do : 


Hope it will help someone

I have a Field called "Name" in tree view. I want to increase the column width for this field so the data below does not take up too many lines.

Solution:

<field name="name"/>                <-----------this is the original.

<field name="name" string="    Name    "/> <---------------this is what i have done.

Please note: use ASCII code 255 for space (Alt+255)

Hope this helps someone!

Cheers!

Michael

I ended up solving this the following way:

I added a blank char field in my object definition, called place_holder.

Then, in my tree view I pad it with copies of this field:

<field name="place_holder/"> <field name="place_holder/"> <field name="place_holder/"> <field name="place_holder/"> <field name="place_holder/"> <field name="place_holder/"> <field name="place_holder/">

This is the only work-around I could find. Its a hack, but it does EXACTLY what I was looking for.

Hope this helps someone out there.

-Tim