I try to produce and modify shapes in a PowerPoint presentation but run into a
difficulty setting a variable.
library(RDCOMClient) # load
RDCOMClient package
library(SWinTypeLibs) # package
SWinTypeLibs from Omegahat to access information about COM libraries
ppt = COMCreate("PowerPoint.Application") # create a ppt COM
ppt[["Visible"]] <- TRUE # set
COM property visible to TRUE
pres = ppt$Presentations()$Add() # add a
presentation
slide <- pres$Slides()$Add(1,1)
# add slide to presentation
shape1 <- slide$Shapes()$AddShape(92, 200, 200, 100, 100) # add a shape
object
shape1$Adjustments()$Item(1) # read adjustment
parameter
How can I change this setting now? Taking a look at the functions available it
shows that there are two item() functions - a getter and a setter, but have the
same name.
names(getFuncs(shape1$Adjustments()))
str(getFuncs(shape1$Adjustments())[[12]]) # getter
str(getFuncs(shape1$Adjustments())[[13]]) # setter
In VBA it works like this, supposing the shape is selected:
ActiveWindow.Selection.ShapeRange.Adjustments.Item(1) = 2
Here getting and setting is done by appointing a value or not.
I have no clue how to use the setter via R. Can anyone help?
A lot of thanks in advance!!
Mark
–––––––––––––––––––––––––––––––––––––––
Mark Heckmann
Dipl. Wirt.-Ing. cand. Psych.
Vorstraße 93 B01
28359 Bremen
Blog: www.markheckmann.de
R-Blog: http://ryouready.wordpress.com
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