Added SetColWidth Function

sheet.go

@@ -59,6 +59,25 @@ func (sh *Sheet) Cell(row, col int) *Cell {
 	return new(Cell)
 }
 
+//Set the width of a single column or multipel columns.
+func (s *Sheet) SetColWidth(startcol, endcol int, width float64) error {
+	if startcol > endcol {
+		return fmt.Errorf("Could not set width for range %g-%g: startcol must be less than endcol.", startcol, endcol)
+	}
+	col := &Col{
+		Min:       startcol + 1,
+		Max:       endcol + 1,
+		Hidden:    false,
+		Collapsed: false,
+		// Style:     0,
+		Width: width}
+	s.Cols = append(s.Cols, col)
+	if endcol+1 > s.MaxCol {
+		s.MaxCol = endcol + 1
+	}
+	return nil
+}
+
 // Dump sheet to it's XML representation, intended for internal use only
 func (s *Sheet) makeXLSXSheet(refTable *RefTable, styles *xlsxStyleSheet) *xlsxWorksheet {
 	worksheet := newXlsxWorksheet()
@@ -75,20 +94,20 @@ func (s *Sheet) makeXLSXSheet(refTable *RefTable, styles *xlsxStyleSheet) *xlsxW
 		for c, cell := range row.Cells {
 			style := cell.GetStyle()
 			if style != nil {
-			xFont, xFill, xBorder, xCellStyleXf, xCellXf := style.makeXLSXStyleElements()
-			fontId := styles.addFont(xFont)
-			fillId := styles.addFill(xFill)
-			borderId := styles.addBorder(xBorder)
-			xCellStyleXf.FontId = fontId
-			xCellStyleXf.FillId = fillId
-			xCellStyleXf.BorderId = borderId
-			xCellStyleXf.NumFmtId = 0 // General
-			xCellXf.FontId = fontId
-			xCellXf.FillId = fillId
-			xCellXf.BorderId = borderId
-			xCellXf.NumFmtId = 0 // General
-			styles.addCellStyleXf(xCellStyleXf)
-			XfId = styles.addCellXf(xCellXf)
+				xFont, xFill, xBorder, xCellStyleXf, xCellXf := style.makeXLSXStyleElements()
+				fontId := styles.addFont(xFont)
+				fillId := styles.addFill(xFill)
+				borderId := styles.addBorder(xBorder)
+				xCellStyleXf.FontId = fontId
+				xCellStyleXf.FillId = fillId
+				xCellStyleXf.BorderId = borderId
+				xCellStyleXf.NumFmtId = 0 // General
+				xCellXf.FontId = fontId
+				xCellXf.FillId = fillId
+				xCellXf.BorderId = borderId
+				xCellXf.NumFmtId = 0 // General
+				styles.addCellStyleXf(xCellStyleXf)
+				XfId = styles.addCellXf(xCellXf)
 			}
 			if c > maxCell {
 				maxCell = c

sheet_test.go

@@ -152,3 +152,17 @@ func (s *SheetSuite) TestMarshalSheetWithMultipleCells(c *C) {
 <worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"><sheetPr filterMode="false"><pageSetUpPr fitToPage="false"></pageSetUpPr></sheetPr><dimension ref="A1:B1"></dimension><sheetViews><sheetView windowProtection="false" showFormulas="false" showGridLines="true" showRowColHeaders="true" showZeros="true" rightToLeft="false" tabSelected="true" showOutlineSymbols="true" defaultGridColor="true" view="normal" topLeftCell="A1" colorId="64" zoomScale="100" zoomScaleNormal="100" zoomScalePageLayoutView="100" workbookViewId="0"><selection pane="topLeft" activeCell="A1" activeCellId="0" sqref="A1"></selection></sheetView></sheetViews><sheetFormatPr defaultRowHeight="12.85"></sheetFormatPr><cols><col collapsed="false" hidden="false" max="1" min="1" width="9.5"></col><col collapsed="false" hidden="false" max="2" min="2" width="9.5"></col></cols><sheetData><row r="1"><c r="A1" s="0" t="s"><v>0</v></c><c r="B1" s="0" t="s"><v>1</v></c></row></sheetData><printOptions headings="false" gridLines="false" gridLinesSet="true" horizontalCentered="false" verticalCentered="false"></printOptions><pageMargins left="0.7875" right="0.7875" top="1.05277777777778" bottom="1.05277777777778" header="0.7875" footer="0.7875"></pageMargins><pageSetup paperSize="9" scale="100" firstPageNumber="1" fitToWidth="1" fitToHeight="1" pageOrder="downThenOver" orientation="portrait" usePrinterDefaults="false" blackAndWhite="false" draft="false" cellComments="none" useFirstPageNumber="true" horizontalDpi="300" verticalDpi="300" copies="1"></pageSetup><headerFooter differentFirst="false" differentOddEven="false"><oddHeader>&amp;C&amp;&#34;Times New Roman,Regular&#34;&amp;12&amp;A</oddHeader><oddFooter>&amp;C&amp;&#34;Times New Roman,Regular&#34;&amp;12Page &amp;P</oddFooter></headerFooter></worksheet>`
 	c.Assert(output.String(), Equals, expectedXLSXSheet)
 }
+
+func (s *SheetSuite) TestSetColWidth(c *C) {
+	file := NewFile()
+	sheet := file.AddSheet("Sheet1")
+	_ = sheet.SetColWidth(0, 0, 10.5)
+	_ = sheet.SetColWidth(1, 5, 11)
+
+	c.Assert(sheet.Cols[0].Width, Equals, 10.5)
+	c.Assert(sheet.Cols[0].Max, Equals, 1)
+	c.Assert(sheet.Cols[0].Min, Equals, 1)
+	c.Assert(sheet.Cols[1].Width, Equals, float64(11))
+	c.Assert(sheet.Cols[1].Max, Equals, 6)
+	c.Assert(sheet.Cols[1].Min, Equals, 2)
+}