<record id="hr_timesheet_line_form2" model="ir.ui.view">			
    <field name="name">account.analytic.line.form2</field>			
    <field name="model">account.analytic.line</field>			
    <field name="inherit_id" ref="hr_timesheet.hr_timesheet_line_form"/>			
    <field name="context">{'check_remaining': True}</field>			
    <field name="arch" type="xml">				
    <xpath expr="//field[@name='unit_amount']" position="attributes">					
    <attribute name="context">{'check_remaining': True}</attribute>				
    </xpath> ...
// in my code
class AccountAnalyticLineExt(models.Model):
    _inherit = 'account.analytic.line'
    ...

    def _timesheet_preprocess(self, vals):   
        vals = super(AccountAnalyticLineExt, self)._timesheet_preprocess(vals);        
        remaining = self.env.context.get('check_remaining', False) // always False

I try 2 times to set the context with check_remaining to True, because i want to check if the call came from my own (inherited) view, but it is ALWAYS False. Any Idea? My Odoo is odoo 11. Thanks