The GtkCombo widget consists of a single-line text entry field and a drop-down
list. The drop-down list is displayed when the user clicks on a small arrow
button to the right of the entry field. The drop-down list is a GtkList widget and can be accessed using the
list member of the GtkCombo.
List elements can contain arbitrary widgets, but if an element is not a
plain label, then you must use the gtkListSetItemString() function.
This sets the string which will be placed in the text entry field when the
item is selected. By default, the user can step through the items in the list using the
arrow (cursor) keys, though this behaviour can be turned off with
gtkComboSetUseArrows. As of GTK+ 2.4, GtkCombo has been deprecated in favor of GtkComboBoxEntry. Creating a GtkCombo widget with simple text
items.
######
# Creating a combobox with simple text items
###### items <- c("First Item", "Second Item", "Third Item", "Fourth Item",
"Fifth Item")
combo <- gtkCombo()
combo$setPopdownStrings(items)
Creating a GtkCombo widget with a complex item.
######
# Creating a combobox with a complex item
###### combo <- gtkCombo()
item <- gtkListItem() ## You can put almost anything into the GtkListItem widget. Here we will use
## a horizontal box with an arrow and a label in it.
hbox <- gtkHbox(FALSE, 3)
item$add(hbox) arrow <- gtkArrow("right", "out")
hbox$packStart(arrow, FALSE, FALSE, 0) label <- gtkLabel("First Item")
hbox$packStart(label, FALSE, FALSE, 0) ## You must set the string to display in the entry field when the item is
## selected.
combo$setItemString(item, "1st Item") ## Now we simply add the item to the combo's list.
combo[["list"]]$add(item)