Get the event pattern and callback Tcl code of a canvas binding

This function returns the registered event pattern and the Tcl callback code that the Tcl interpreter evaluates after a event occurs that matches the event pattern.

Usage

l_bind_canvas_get(widget, id)

Arguments

widget: widget path as a string or as an object handle
id: canvas binding id

Value

Character vector of length two. First element is the event pattern, the second element is the Tcl callback code.

Details

Bindings, callbacks, and binding substitutions are described in detail in loon's documentation webpage, i.e. run l_help("learn_R_bind")

Examples

# binding for when plot is resized
if(interactive()){
p <- l_plot(iris[,1:2], color=iris$Species)

printSize <- function(p) {
    size <- l_size(p)
    cat(paste('Size of widget ', p, ' is: ',
              size[1], 'x', size[2], ' pixels\n', sep=''))
}

l_bind_canvas(p, event='<Configure>', function(W) {printSize(W)})

id <- l_bind_canvas_ids(p)
id

l_bind_canvas_get(p, id)

}