Make Custom Grid summaries able to read more than column data

[VirtualisProject]

Is your feature request related to a problem? Please describe.

I'm currently working on implementing a grid summaries for my igx-grid. This grid in particular grid have the following columns:

• Total units
• First pass count (how many of the total units that passed the test in the first run)
• Yield (percentage value of passed units)

I want to have a summary for average yield, but I cannot simply take the average of the 'Yield' columb for the summary, because the 'Average yield' is determined by the number to total units / first pass count.

Therefore, i as a developer, i would like to be able to send in input parameters to custom grid summary's, so that i can make sure that IgxSummaryResult.summaryResult returns the correct value.

Describe the solution you'd like

Make grid summaries templateble in the Igx-column / igx-grid

[zdrawku]

Hey @VirtualisProject, all data records are accessible from each column, so you can do whatever is needed with it. Two additional optional parameters are introduced in the IgxSummaryOperand operate method.

Example:

class MySummary extends IgxNumberSummaryOperand {
    constructor() {
        super();
    }
    operate(columnData: any[], allGridData = [], fieldName?): IgxSummaryResult[] {
        const result = super.operate(allData.map(r => r[fieldName]));
        result.push({ key: 'test', label: 'Total Discounted', summaryResult: allData.filter((rec) => rec.Discontinued).length });
        return result;
    }
}

Working sample

[kdinev]

Duplicate of #5754

[zdrawku]

Sample - https://www.infragistics.com/products/ignite-ui-angular/angular/components/grid/summaries.html#custom-summaries-which-access-all-grid-data