Querying the Viewport Tree {grid} | R Documentation |
current.viewport()
returns the viewport that Grid is going to draw into.
current.vpTree
returns the entire Grid viewport tree.
current.vpPath
returns the viewport path to the current viewport.
current.transform
returns the transformation
matrix for the current viewport.
current.viewport(vp=NULL) current.vpTree(all=TRUE) current.vpPath() current.transform()
vp |
A Grid viewport object. Use of this argument has been deprecated. |
all |
A logical value indicating whether the entire viewport tree should be returned. |
If all
is FALSE
then
current.vpTree
only returns the subtree below
the current viewport.
A Grid viewport object from current.viewport
or
current.vpTree
.
current.transform
returns a 4x4 transformation matrix.
The viewport path returned by current.vpPath
is NULL
if the current viewport is the ROOT
viewport
Paul Murrell
grid.newpage() pushViewport(viewport(width=0.8, height=0.8, name="A")) pushViewport(viewport(x=0.1, width=0.3, height=0.6, just="left", name="B")) upViewport(1) pushViewport(viewport(x=0.5, width=0.4, height=0.8, just="left", name="C")) pushViewport(viewport(width=0.8, height=0.8, name="D")) current.vpPath() upViewport(1) current.vpPath() current.vpTree() current.viewport() current.vpTree(all=FALSE) popViewport(0)