topic Re: Custom visual Table using Javascript &colon; Filter Row, Column and single Cell in Custom Visuals Development Discussion

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

Anonymous — Mon, 27 May 2019 10:42:44 GMT

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?

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

v-evelk — Tue, 28 May 2019 15:47:36 GMT

Hi,

Check this article please.

Kind Regards,

Evgenii Elkin,
Software Engineer
Microsoft Power BI Custom Visuals
pbicvsupport@microsoft.com

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

Anonymous — Wed, 29 May 2019 08:34:24 GMT

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

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

v-evelk — Wed, 29 May 2019 15:16:51 GMT

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
pbicvsupport@microsoft.com

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

Anonymous — Wed, 29 May 2019 15:28:42 GMT

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?

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

v-evelk — Thu, 30 May 2019 15:21:04 GMT

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
pbicvsupport@microsoft.com

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

Anonymous — Fri, 31 May 2019 13:51:02 GMT

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