Add new worksheet() API for Document class

src/xlsx/xlsxdocument.cpp

@@ -592,6 +592,15 @@ Workbook *Document::workbook() const
     return d->workbook.data();
 }
 
+/*!
+ * Returns the worksheet object named \a sheetName.
+ */
+Worksheet *Document::worksheet(const QString &sheetName) const
+{
+    Q_D(const Document);
+    return d->workbook->worksheet(worksheetNames().indexOf(sheetName));
+}
+
 /*!
  * Creates and append an document with name \a name.
  * Return true if success.

src/xlsx/xlsxdocument.h

@@ -92,6 +92,7 @@ public:
     bool deleteWorksheet(const QString &name);
 
     Workbook *workbook() const;
+    Worksheet *worksheet(const QString &sheetName) const;
     Worksheet *currentWorksheet() const;
     Q_DECL_DEPRECATED bool setSheetName(const QString &name);
     Q_DECL_DEPRECATED void setCurrentWorksheet(int index);