These functions enable mixing base and grid graphics in
aheatmap, by avoiding calls to the grid
internal function 'L_gridDirty'. They are not
exported (i.e. not tampering core functions) and are only
meant for internal use within the NMF package.
tryViewport tries to go down to a viewport in the
current tree, given its name.
current.vpPath_patched aims at substituting
current.vpPath, so that the graphic
engine is not reset. This is essentially to prevent
outputting a blank page at the beginning of PDF graphic
engines.
.use.grid.patch tells if the user enabled patching
grid.
tryViewport(name, verbose = FALSE) current.vpPath_patched()
.use.grid.patch()
viewport name
toggle verbosity
tryViewport uses grid.ls and
not seekViewport as the latter would reset
the graphic device and break the mix grid/base graphic
capability.