saveGridConfig() {
        // TODO: when server-side settings are supported, this operation
        // may offer to save to user/workstation OR org unit settings
        // depending on perms.

        this.gridContext.saveGridConfig().then(
            // hide the with config after saving
            ok => this.colWidthConfig.isVisible = false,
            err => console.error(`Error saving columns: ${err}`)
        );
    }

    printGrid() {
        this.progressDialog.open();
        const columns = this.gridContext.columnSet.displayColumns();
        const textItems = {columns: columns, rows: []};

        this.gridContext.getAllRowsAsText().subscribe(
            row => {
              this.progressDialog.increment();
              textItems.rows.push(row);
            },
            err => this.progressDialog.close(),
            ()  => {
                this.progressDialog.close();
                this.printer.print({
                    template: this.printTemplate,
                    contextData: textItems,
                    printContext: 'default'
                });
            }
        );
    }

    generateCsvExportUrl($event) {

        if (this.csvExportInProgress) {
            // This is secondary href click handler.  Give the
            // browser a moment to start the download, then reset
            // the CSV download attributes / state.
            setTimeout(() => {
                this.csvExportUrl = null;
                this.csvExportFileName = '';
                this.csvExportInProgress = false;
               }, 500
            );
            return;
        }

        this.csvExportInProgress = true;

        // let the file name describe the grid
        this.csvExportFileName = (
            this.gridContext.persistKey || 'eg_grid_data'
        ).replace(/\s+/g, '_') + '.csv';

        this.gridContext.gridToCsv().then(csv => {
            const blob = new Blob([csv], {type : 'text/plain'});
            const win: any = window; // avoid TS errors
            this.csvExportUrl = this.sanitizer.bypassSecurityTrustUrl(
                (win.URL || win.webkitURL).createObjectURL(blob)
            );

            // Fire the 2nd click event now that the browser has
            // information on how to download the CSV file.
            setTimeout(() => $event.target.click());
        });

        $event.preventDefault();
    }

 shouldDisableAction(action: GridToolbarAction) {
     if (action.disableOnRows) {
         return action.disableOnRows(this.gridContext.getSelectedRows());
     }
     return false;
 }

 performButtonAction(button: GridToolbarButton) {
     const rows = this.gridContext.getSelectedRows();
     button.onClick.emit();
     if (button.action) { button.action(); }
 }

 performAction(action: GridToolbarAction) {
     const rows = this.gridContext.getSelectedRows();
     action.onClick.emit(rows);
     if (action.action) { action.action(rows); }
 }

 performAction(action: GridToolbarAction) {
     action.action(this.gridContext.getSelectedRows());
 }