forked from verdnatura/hedera-web
60 lines
810 B
JavaScript
60 lines
810 B
JavaScript
/**
|
|
* Computes a sum of data in the model.
|
|
**/
|
|
Db.CalcSum = new Class
|
|
({
|
|
Extends: Db.Calc
|
|
,Tag: 'db-calc-sum'
|
|
|
|
,getRowValue: function (row)
|
|
{
|
|
var value;
|
|
|
|
if (this._func)
|
|
{
|
|
this.form.row = row;
|
|
value = this._func (this.form);
|
|
}
|
|
else
|
|
value = this._model.getByIndex (row, this.columnIndex);
|
|
|
|
return value;
|
|
}
|
|
|
|
,before: function (row)
|
|
{
|
|
var value = this.getRowValue (row)
|
|
|
|
if (value !== null)
|
|
{
|
|
this.sum -= value;
|
|
this.numbersCount--;
|
|
}
|
|
}
|
|
|
|
,after: function (row)
|
|
{
|
|
var value = this.getRowValue (row);
|
|
|
|
if (value !== null)
|
|
{
|
|
this.sum += value;
|
|
this.numbersCount++;
|
|
}
|
|
}
|
|
|
|
,init: function ()
|
|
{
|
|
this.sum = 0;
|
|
this.numbersCount = 0;
|
|
}
|
|
|
|
,done: function ()
|
|
{
|
|
if (this.numbersCount > 0)
|
|
this.value = this.sum;
|
|
else
|
|
this.value = null;
|
|
}
|
|
});
|