Accessing Existing Chart Documents
To get a container of all charts contained in a spreadsheet document, use the com.sun.star.table.XTableChartsSupplier of the service com.sun.star.sheet.Spreadsheet, which is available at single spreadsheets.
To get all OLE-shapes of a draw page, use the interface com.sun.star.drawing.XDrawPage, that is based on com.sun.star.container.XIndexAccess. You can iterate over all shapes on the draw page and check their
CLSID property to find out, whether the found object is a chart.
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