Looks like Microsoft suggests [1] conditional formatting or a data table (XSSFTable), so you were on the right track to solve this with POI's conditional formatting.
Either way, it sounds like we should cover this somewhat common scenario either in poi-examples or the spreadsheet quick guide. Pull requests greatly appreciated. [1] https://support.office.com/en-us/article/Apply-shading-to-alternate-rows-in-a-worksheet-a443b0f5-2025-42f6-9099-5de09c05e880 On Dec 19, 2016 19:57, "Mark Murphy" <jmarkmur...@gmail.com> wrote: > BTW, if you look at the quick guide > https://poi.apache.org/spreadsheet/quick-guide.html#CellProperties you > will > find two methods of drawing borders without creating all those unused > intermediate styles. > > On Mon, Dec 19, 2016 at 4:04 PM, Eric Douglas <edoug...@blockhouse.com> > wrote: > > > Yeah, I wouldn't expect really fast response from a list like this. My > > previous message was 6 days ago. > > I didn't see an easy way to get alternate row styling with regular styles > > (to color only even numbered rows, and keep only even numbered rows > colored > > if the user sorts by a different column) but I did get the conditional > > formatting working. The bad part is the order of precedence. The > > application applies the individual cell colors then the conditional > > format. I wanted cell colors in the individual cell styles to override > the > > conditional. The only thing I've found that I think would work is > coding a > > VBA method into the conditional formatting to tell the "ISEVEN(ROW())" to > > apply only if the cell does not already have individual coloring, but the > > syntax for applying VBA sounds ugly. > > > > I did unzip some xlsx files and read through the schema and we can easily > > see why some people send us really large files. Saving spreadsheets from > > LibreOffice wants to write a lot of styles it doesn't need. Some just > code > > duplicate styles and end up with hundreds or thousands, where I got mine > > only writing unique so there's about 11. Some of the POI API doesn't > make > > sense, as I tried to apply a thin border around every populated cell and > > ended up with 9 border styles, with cell styles only referencing 3 of > them. > > ie: > > > > <borders count="9"><border><left style="hair"><color > > auto="true"/></left><right style="hair"><color auto="true"/></right><top > > style="hair"><color auto="true"/></top><bottom style="hair"><color > > auto="true"/></bottom><diagonal/></border><border><bottom > > style="hair"/></border><border><left style="hair"/><bottom > > style="hair"/></border><border><left style="hair"/><right > > style="hair"/><bottom style="hair"/></border><border><left > > style="hair"/><right style="hair"/><top style="hair"/><bottom > > style="hair"/></border><border><left style="hair"/><right > > style="hair"/><top style="hair"/><bottom style="hair"><color > > indexed="64"/></bottom></border><border><left style="hair"><color > > indexed="64"/></left><right style="hair"/><top style="hair"/><bottom > > style="hair"><color indexed="64"/></bottom></border><border><left > > style="hair"><color indexed="64"/></left><right style="hair"><color > > indexed="64"/></right><top style="hair"/><bottom style="hair"><color > > indexed="64"/></bottom></border><border><left style="hair"><color > > indexed="64"/></left><right style="hair"><color > indexed="64"/></right><top > > style="hair"><color indexed="64"/></top><bottom style="hair"><color > > indexed="64"/></bottom></border></borders> > > > > <cellStyleXfs count="8"><xf numFmtId="0" fontId="0" fillId="0" > > borderId="0"/><xf borderId="0" fillId="0" fontId="0" numFmtId="0" > > xfId="1"/><xf borderId="0" fillId="0" fontId="0" numFmtId="0" > xfId="2"/><xf > > borderId="0" fillId="0" fontId="0" numFmtId="0" xfId="3"/><xf > borderId="0" > > fillId="0" fontId="0" numFmtId="0" xfId="4"/><xf borderId="0" fillId="0" > > fontId="0" numFmtId="0" xfId="5"/><xf borderId="0" fillId="0" fontId="0" > > numFmtId="0" xfId="6"/><xf borderId="0" fillId="0" fontId="0" > numFmtId="0" > > xfId="7"/></cellStyleXfs> > > > > <cellXfs count="8"><xf numFmtId="0" fontId="0" fillId="0" borderId="4" > > xfId="0" applyFont="true" applyBorder="true"><alignment > > horizontal="left"/></xf><xf xfId="1" borderId="8" fillId="5" fontId="0" > > numFmtId="0" applyBorder="true" applyNumberFormat="true" applyFill="true" > > applyFont="true"><alignment horizontal="left" textRotation="0" > > vertical="bottom" wrapText="false"/><protection locked="true"/></xf><xf > > xfId="2" borderId="8" fillId="5" fontId="0" numFmtId="0" > applyBorder="true" > > applyNumberFormat="true" applyFill="true" applyFont="true"><alignment > > horizontal="center" textRotation="0" vertical="bottom" > > wrapText="false"/><protection locked="true"/></xf><xf xfId="3" > borderId="8" > > fillId="3" fontId="0" numFmtId="0" applyBorder="true" > > applyNumberFormat="true" applyFill="true" applyFont="true"><alignment > > horizontal="left" textRotation="0" vertical="bottom" > > wrapText="false"/><protection locked="true"/></xf><xf xfId="4" > borderId="8" > > fillId="2" fontId="0" numFmtId="164" applyBorder="true" > > applyNumberFormat="true" applyFill="true" applyFont="true"><alignment > > horizontal="left" textRotation="0" vertical="bottom" > > wrapText="false"/><protection locked="true"/></xf><xf xfId="5" > borderId="8" > > fillId="3" fontId="0" numFmtId="165" applyBorder="true" > > applyNumberFormat="true" applyFill="true" applyFont="true"><alignment > > horizontal="left" textRotation="0" vertical="bottom" > > wrapText="false"/><protection locked="true"/></xf><xf xfId="6" > borderId="8" > > fillId="3" fontId="0" numFmtId="165" applyBorder="true" > > applyNumberFormat="true" applyFill="true" applyFont="true"><alignment > > horizontal="right" textRotation="0" vertical="bottom" > > wrapText="false"/><protection locked="true"/></xf><xf xfId="7" > borderId="8" > > fillId="2" fontId="0" numFmtId="165" applyBorder="true" > > applyNumberFormat="true" applyFill="true" applyFont="true"><alignment > > horizontal="right" textRotation="0" vertical="bottom" > > wrapText="false"/><protection locked="true"/></xf></cellXfs> > > > > The conditional formatting ends up in sheet1.xml after the sheetData, > and I > > coded an option to skip heading rows: > > <conditionalFormatting sqref="A1:AMJ1048576"><cfRule type="expression" > > dxfId="0" > > priority="1"><formula>AND(ISEVEN(ROW()),ROW()>1)</formula></cfRule></ > > conditionalFormatting> > > which of course links to dxf in the styles.xml > > <dxfs count="1"><dxf><fill><patternFill patternType="solid"><bgColor > > rgb="E4F7F7"/></patternFill></fill></dxf></dxfs> > > > > On Mon, Dec 19, 2016 at 3:36 PM, Javen O'Neal <one...@apache.org> wrote: > > > > > I think there's a way to apply alternate row styling within regular > > styles > > > (not conditional formatting), but have never used POI to do this. > Rather > > > than tell you the wrong answer, I'd rather stay quiet to avoid > > unnecessary > > > confusion. Read through the OOXML schemas or create a file in Excel > with > > > alternate row styling, unzip the xlsx file, and read the XML to figure > > out > > > how POI needs to create the same file. > > > > > > > How many POI developers actively monitor this list? > > > At least half a dozen. Nick is one of them. > > > Some of us don't live in your timezone, so same-day responses are > > unlikely. > > > We use a minimum window of 72 hours whenever we vote on a release. > > > > > > Not all of us are experts at the feature you're needing help with, > > > conditional formatting, which may be another reason for low response. > > > > > > We volunteer our time, working on POI between our day jobs and personal > > > lives. Given the holiday season is close, I would expect developers to > be > > > particularly busy, finishing projects at work before the holiday > closure > > > and preparing for travel to relatives. > > > > > > Personally, I spend less time on POI when work at my day job gets busy. > > > This is to avoid coming down with a cold due to lack of sleep or > > prolonged > > > stress, or burning out. > > > > > > We appreciate your patience. > > > > > > On Dec 19, 2016 11:24, "Eric Douglas" <edoug...@blockhouse.com> wrote: > > > > > > How many POI developers actively monitor this list? I haven't gotten > any > > > answers to those questions. > > > Meanwhile I have a new question. If I create a conditional formatting > > > which is linked to the entire document and colors every other row, how > > can > > > I get individual colors in cell styles to override that, or how can I > get > > > the conditional formatting to only color cells that have no color in > > their > > > individual cell styles? > > > > > > On Tue, Dec 13, 2016 at 9:59 AM, Eric Douglas <edoug...@blockhouse.com > > > > > wrote: > > > > > > > So I took another stab at it. This seems to work, but I have > > questions. > > > > > > > > import java.awt.Color; > > > > import java.io.File; > > > > import java.io.FileOutputStream; > > > > import java.io.IOException; > > > > > > > > import org.apache.poi.ss.usermodel.ConditionalFormattingRule; > > > > import org.apache.poi.ss.usermodel.FillPatternType; > > > > import org.apache.poi.ss.usermodel.PatternFormatting; > > > > import org.apache.poi.ss.usermodel.SheetConditionalFormatting; > > > > import org.apache.poi.ss.util.CellRangeAddress; > > > > import org.apache.poi.xssf.usermodel.XSSFCell; > > > > import org.apache.poi.xssf.usermodel.XSSFCellStyle; > > > > import org.apache.poi.xssf.usermodel.XSSFColor; > > > > import org.apache.poi.xssf.usermodel.XSSFSheet; > > > > import org.apache.poi.xssf.usermodel.XSSFWorkbook; > > > > > > > > public class TestExcel { > > > > > > > > public static void main(String[] args) throws IOException { > > > > XSSFWorkbook wb = new XSSFWorkbook(); > > > > XSSFSheet curSheet = wb.createSheet("Sheet " + > > > > (wb.getNumberOfSheets() + 1)); > > > > XSSFCell c1 = curSheet.createRow(0).createCell(0); > > > > c1.setCellValue(wb.getCreationHelper(). > > > createRichTextString("No > > > > color")); > > > > XSSFCell c2 = curSheet.createRow(1).createCell(0); > > > > c2.setCellValue(wb.getCreationHelper(). > > > createRichTextString("Color > > > > this cell")); > > > > XSSFCell c3 = curSheet.createRow(2).createCell(0); > > > > c3.setCellValue(wb.getCreationHelper(). > > > createRichTextString("No > > > > color")); > > > > XSSFCell c4 = curSheet.createRow(3).createCell(0); > > > > c4.setCellValue(wb.getCreationHelper(). > > > createRichTextString("Color > > > > this cell")); > > > > // set one cell's color > > > > final XSSFCellStyle style1 = wb.createCellStyle(); > > > > style1.setFillForegroundColor(new XSSFColor(new > > > > Color(123,124,125))); > > > > style1.setFillPattern(FillPatternType.SOLID_FOREGROUND); > > > > c4.setCellStyle(style1); > > > > // set all cells' color, every other row > > > > CellRangeAddress[] regions = {CellRangeAddress.valueOf("A1: > > > > AMJ1048576")}; > > > > SheetConditionalFormatting sheetCF = curSheet. > > > > getSheetConditionalFormatting(); > > > > ConditionalFormattingRule rule1 = sheetCF. > > > > createConditionalFormattingRule("ISEVEN(ROW())"); > > > > PatternFormatting fill1 = rule1.createPatternFormatting(); > > > > final XSSFColor customColor = new XSSFColor(new Color(228, > > 247, > > > > 247)); > > > > fill1.setFillBackgroundColor(customColor); > > > > fill1.setFillPattern(PatternFormatting.SOLID_FOREGROUND); > > > > sheetCF.addConditionalFormatting(regions, rule1); > > > > File fi = new File("output.xlsx"); > > > > if (fi.exists()) { > > > > fi.delete(); > > > > } > > > > FileOutputStream output = new FileOutputStream(fi); > > > > wb.write(output); > > > > wb.close(); > > > > output.flush(); > > > > output.close(); > > > > } > > > > } > > > > > > > > 1) Why does it change the background of one cell using > > > > setFillForegroundColor, but to change the background of many cells > > with a > > > > condition I have to call setFillBackgroundColor?? > > > > 2) Why does this create a generic format? When I call > > > > createPatternFormatting() it shows up in the LibreOffice Calc Styles > > and > > > > Formatting section as ConditionalStyle_1. Can I name this style? > > > > 3) Why does this look like a regular style in the Calc program with > > many > > > > attributes I can set, but the API only allows me to set the fill > color? > > > > > > > > On Mon, Dec 12, 2016 at 4:33 PM, Nick Burch <apa...@gagravarr.org> > > > wrote: > > > > > > > >> On Mon, 12 Dec 2016, Eric Douglas wrote: > > > >> > > > >>> I found one sample that shows how to code the condition using > > > >>> org.apache.poi.ss.usermodel.SheetConditionalFormatting. > > > addConditionalFormatting() > > > >>> to put in the formula that would color each cell if it's in an even > > > >>> numbered row, but I'm having trouble figuring out the API to apply > > the > > > >>> formula to every cell on the worksheet. > > > >>> > > > >> > > > >> For every cell on a sheet, just give a cellrangeaddress that covers > > the > > > >> whole extent > > > >> > > > >> For every formula cell, you'd need to loop over all cells checking > the > > > >> cell type, then add just those > > > >> > > > >> Nick > > > >> > > > >> ------------------------------------------------------------ > --------- > > > >> To unsubscribe, e-mail: user-unsubscr...@poi.apache.org > > > >> For additional commands, e-mail: user-h...@poi.apache.org > > > >> > > > >> > > > > > > > > > >
