usky-oa
/
jnpf-web-datareport


			
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  <title>Pre-populate new rows from template - Handsontable</title>

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        content="Below example shows how Legend match function can be used to present the template values for empty rows">
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          <h2>Pre-populate new rows from template</h2>

          <p>Below example shows how cell renderers can be used to present the template values for empty rows.</p>

          <p>When any cell in the empty row is edited, the
            <b>onChange</b> callback fills the row with the template values.</p>

          <div id="example1"></div>

          <style>
            .placeholder {
              color: #777;
              font-style: italic;
            }
          </style>

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            <button name="dump" data-dump="#example1" data-instance="hot1" title="Prints current data source to Firebug/Chrome Dev Tools">
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          <script data-jsfiddle="example1">
            var
              tpl = ['one', 'two', 'three'],
              data = [
                ['', 'Kia', 'Nissan', 'Toyota', 'Honda'],
                ['2008', 10, 11, 12, 13],
                ['2009', 20, 11, 14, 13],
                ['2009', 30, 15, 12, 13]
              ],
              container = document.getElementById('example1'),
              hot1;

            function isEmptyRow(instance, row) {
              var rowData = instance.getData()[row];

              for (var i = 0, ilen = rowData.length; i < ilen; i++) {
                if (rowData[i] !== null) {
                  return false;
                }
              }

              return true;
            }

            function defaultValueRenderer(instance, td, row, col, prop, value, cellProperties) {
              var args = arguments;

              if (args[5] === null && isEmptyRow(instance, row)) {
                args[5] = tpl[col];
                td.style.color = '#999';
              }
              else {
                td.style.color = '';
              }
              Handsontable.renderers.TextRenderer.apply(this, args);
            }

            hot1 = new Handsontable(container, {
              startRows: 8,
              startCols: 5,
              minSpareRows: 1,
              contextMenu: true,
              cells: function (row, col, prop) {
                var cellProperties = {};

                cellProperties.renderer = defaultValueRenderer;

                return cellProperties;
              },
              beforeChange: function (changes) {
                var instance = hot1,
                  ilen = changes.length,
                  clen = instance.colCount,
                  rowColumnSeen = {},
                  rowsToFill = {},
                  i,
                  c;

                for (i = 0; i < ilen; i++) {
                  // if oldVal is empty
                  if (changes[i][2] === null && changes[i][3] !== null) {
                    if (isEmptyRow(instance, changes[i][0])) {
                      // add this row/col combination to cache so it will not be overwritten by template
                      rowColumnSeen[changes[i][0] + '/' + changes[i][1]] = true;
                      rowsToFill[changes[i][0]] = true;
                    }
                  }
                }
                for (var r in rowsToFill) {
                  if (rowsToFill.hasOwnProperty(r)) {
                    for (c = 0; c < clen; c++) {
                      // if it is not provided by user in this change set, take value from template
                      if (!rowColumnSeen[r + '/' + c]) {
                        changes.push([r, c, null, tpl[c]]);
                      }
                    }
                  }
                }
              }
            });

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