Add another sample Python script

Change-Id: I542a8b36a097d8961dc76fdcc3d25a3d7b6eb526
Reviewed-on: https://gerrit.libreoffice.org/51966
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tor Lillqvist <tml@collabora.com>

scripting/examples/python/SetCellColor.py

@@ -0,0 +1,15 @@
+def SetCellColor(x, y, color):
+    """Sets the background of the cell at (x,y) (zero-based column and row
+       indices, for example (2,3) == C4) on the first sheet and
+       returns the contents of the cell as a string.
+    """
+    #get the doc from the scripting context which is made available to all scripts
+    desktop = XSCRIPTCONTEXT.getDesktop()
+    model = desktop.getCurrentComponent()
+    #check whether there's already an opened document
+    if not hasattr(model, "Sheets"):
+        return ""
+    sheet = model.Sheets.Sheet1
+    cell = sheet.getCellByPosition(x, y)
+    cell.CellBackColor = color
+    return cell.String