R: Create a Frame for Packing Objects

grid.frame {grid} | R Documentation

## Create a Frame for Packing Objects

### Description

These functions, together with `grid.pack`, `grid.place`, `packGrob`, and `placeGrob` are part of a GUI-builder-like interface to constructing graphical images. The idea is that you create a frame with this function then use `grid.pack` or whatever to pack/place objects into the frame.

### Usage

    grid.frame(layout=NULL, name=NULL, gp=gpar(), vp=NULL, draw=TRUE)
    frameGrob(layout=NULL, name=NULL, gp=gpar(), vp=NULL)

### Arguments

`layout` | A Grid layout, or NULL. This can be used to initialise the frame with a number of rows and columns, with initial widths and heights, etc.
`name` | A character identifier.
`vp` | An object of class `viewport`, or NULL.
`gp` | An object of class `gpar`; typically the output from a call to the function `gpar`.
`draw` | Should the frame be drawn.

### Details

Both functions create a frame grob (a graphical object describing a frame), but only `grid.frame()` draws the frame (and then only if `draw` is `TRUE`). Nothing will actually be drawn, but it will put the frame on the display list, which means that the output will be dynamically updated as objects are packed into the frame. Possibly useful for debugging.

### Value

A frame grob. `grid.frame()` returns the value invisibly.

### Author(s)

Paul Murrell

### See Also

`grid.pack`

### Examples

    grid.newpage()
    grid.frame(name="gf", draw=TRUE)
    grid.pack("gf", rectGrob(gp=gpar(fill="grey")), width=unit(1, "null"))
    grid.pack("gf", textGrob("hi there"), side="right")

[Package grid version 3.5.1 Index]