gimage: Container for an image

In jverzani/gWidgetsWWW2.rapache: Toolkit implementation of the gWidgets API for use with web pages

Description

The image shows an image file. Use ghtml with the "img" tag to show a url

Usage

  gimage(filename = "", dirname = "", size = NULL,
    handler = NULL, action = NULL, container = NULL, ...,
    width = NULL, height = NULL, ext.args = NULL)

Arguments

filename	an image file.
dirname	ignored.
size	A vector passed to width and height arguments.
handler	optional handler bound via addHandlerChanged
action	optional value to paramaterize handler
container	parent container
...	passed along to add call of the container. Can be used to adjust layout parameters. May also have other uses.
width	a pre-specified width (in pixels) for the widget
height	a pre-specified height (in pixels) for the widget
ext.args	A list of extra arguments to pass to the ExtJS constructor

Note

requires tempdir to be mapped to a specific url, as this is assumed by get_tempfile and get_tempfile_url

Examples

w <- gwindow("hello", renderTo="replaceme")
sb <- gstatusbar("Powered by gWidgetsWWW and Rook", cont=w)
g <- ggroup(cont=w, horizontal=FALSE)

f <- tempfile()
png(f)
hist(rnorm(100))
dev.off()

i <- gimage(f, container=g)
b <- gbutton("click", cont=g, handler=function(h,...) {
  f <- tempfile()
  png(f)
  hist(rnorm(100))
  dev.off()
  svalue(i) <- f
})

jverzani/gWidgetsWWW2.rapache documentation built on May 20, 2019, 5:19 a.m.