widgetTools (version 1.50.0)

writeText: Functions that read from and write to tcltk widgets

Description

These functions provide some of the common read and write operations for tcltk widgets

Usage

writeText(widget, value, clear = TRUE)
writeList(widget, value, clear = TRUE)
getListValue(which)
getTextValue(which)
getEntryValue(which)

Arguments

widget

widget a tkwin object for the tcltk widget to be read or written to

value

value the text of numerical value to be written to a tcltk widget

clear

clear a boolean to indicate whether a value will append to the existing one (FALSE)

which

which a tkwin object for the tcltk widget whose value will be retrieved

Value

getListValue returns the selected value in a tcltk list widget.getTextValue returns the value of a text box.getEntryValue returns the value of an entry box.

Details

writeText writes to a given tcltk text box widget.

writeList writes to a given tcltk list or entry box widget.

getListValue retrieves the selected value in a tcltk list widget.

getTextValue retrieves the value of a text box.

getEntryValue retrieves the value of an entry box.

References

R tcltk

See Also

basicPW-class, widget-class

Examples

## Not run: 
#     ## These cannot be run by examples() but should be OK when pasted
#     ## into an interactive R session with the widgetTools package loaded
# 
#     # Create the widgets
#     base <- tktoplevel()
#     list <- tklistbox(base, width = 20, height = 5)
# 
#     entry <- tkentry(base)
#     text <- tktext(base, width = 20, height = 5)
#     tkpack(list, entry, text)
#     # Write and read from the widgets
#     writeList(list, c("Option1", "Option2", "Option3"))
#     writeList(entry, "An Entry box")
#     writeText(text, "A text box")
#     # Will be NULL if not selected
#     getListValue(list)
#     getTextValue(text)
#     getEntryValue(entry)
# # Destroy toplevel widget
# #    tkdestroy(base)
# ## End(Not run)

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