Custom visual Table using Javascript : Filter Row, Column and single Cell

[Anonymous]

Hi everybody,

I am writing here hoping to find someone who can help me to find the correct way to develop a custom table visual for power BI.

At this moment I am able to take data from capabilites file using:

 var table: DataViewTable = options.dataViews[0].table

            var columns: DataViewMetadataColumn[] = table.columns;

            var rows: DataViewTableRow[] = table.rows;

After that I manipulate it and I put them in a html table(thead and tbody).

var columnsName = [];

            for (var i = 0; i < columns.length; i++) {
                columnsName[i] = columns[i].displayName
            }

            var stringToBuild = "["

            for (var i = 0; i < rows.length; i++) {
                stringToBuild += "{"
                for (var j = 0; j < columnsName.length; j++) {

                    var colName = columnsName[j]
                    var newLocal = rows[i][j];
                    stringToBuild += "\"" + colName + "\": " + "\"" + newLocal + "\""

                    if (j != columnsName.length - 1) {
                        stringToBuild += ","
                    }
                }
                stringToBuild += "}"
                if (i != rows.length - 1) {
                    stringToBuild += ","
                }
            }
            stringToBuild += "]"
 var valueToRepresent =JSON.parse(stringToBuild)

this.thead.append('tr')
                .selectAll('th')
                .data(columnsName)
                .enter()
                .append("th")
                .text(function (columnsName) { return columnsName; })
                .style("background-color", this.settings.headerFormatting.color)
                .style("font-size", this.settings.headerFormatting.size + "px")
                .style("color",this.settings.headerFormatting.colorFont);

            // create a row for each object in the data
            this.tbody.selectAll('tr')
                .data(valueToRepresent)
                .enter()
                .append('tr');
          
            // create a cell in each row for each column
            var cells = this.tbody.selectAll('tr').selectAll('td')
                .data(function (row) {
                    return columnsName.map(function (column) {
                        return { column: column, value: row[column] };
                    });
                })
                .enter()
                .append('td')
                .text(function (d) { return d.value; });

This way  it works fine.
Now my next goal is to add the possibility to chick on row and filter all the visuals based on that row.

Anyone can help me?

[v-evelk]

Hi,

Check this article please.

Kind Regards,

Evgenii Elkin,
Software Engineer
Microsoft Power BI Custom Visuals
[email protected]

[Anonymous]

Hi,
I alredy know that link, but there is no explation about dealing with table in capabilities.
That link works only with category.

Could you kindly give me other example?

Thank you,

Francesco

[v-evelk]

Hi Francesco,

You should use API 2.5. It contains .withTable method of the builder that must solve selection issues with Table mapping.

Kind Regards,

Evgenii Elkin,
Software Engineer
Microsoft Power BI Custom Visuals
[email protected]

[Anonymous]

Hi, I am using the version API 2.5 but I am little confused using withTable. Could you give me an example?
Moreover, using withTable I can only filter by row number, right?

[v-evelk]

Hi,

There is no documentation with examples for a while but yes, you need to set rowNumber and colNumber like here.

Kind Regards,

Evgenii Elkin,
Software Engineer
Microsoft Power BI Custom Visuals
[email protected]

[Anonymous · Accepted solution]

I solved by my self.

Here is the fragment of code I have used, maybe it could help others.

private static getSelectionIds(dataView: DataView, host: IVisualHost): ISelectionId[] {
        return dataView.table.identity.map((identity: data.SelectorsByColumn) => {
            const categoryColumn: DataViewCategoryColumn = {
                source: dataView.table.columns[1],
                values: null,
                identity: [identity]
            };

            return host.createSelectionIdBuilder()
                .withCategory(categoryColumn, 0)
                .createSelectionId();
        });
        }

Using this I am able to filter the table by row. I am talking abot versione 2.5.0. The version for 1.6 suggest by someone on internet is:

private static getSelectionIds(dataView: DataView, host: IVisualHost): ISelectionId[] {
            return dataView.table.identity.map((identity: DataViewScopeIdentity) => {
                const categoryColumn: DataViewCategoryColumn = {
                    source: dataView.table.columns[0],
                    values: null,
                    identity: [identity]
                };
        
                return host.createSelectionIdBuilder()
                    .withCategory(categoryColumn, 0)
                    .createSelectionId();
            });
        }

Thank you anyway,

Francesco Multari