DisplayPars-class: Class "DisplayPars" is used to specify graphical parameters...
In GenomeGraphs: Plotting genomic information from Ensembl

Description Objects from the Class Slots Methods Warning Author(s) Examples

The DisplayPars functions analagously to par and gp. Generally the class is instantiated using the DisplayPars function rather than directly.

Objects can be created by calls of the form DisplayPars(...) rather than calls to: new("DisplayPars", ...) by calling the DisplayPars function directly in the constructor the gdObjects are guaranteed to have the appropriate defaults.

pars:: Object of class "environment" Generally this slot is not accessed directly.

getPar: signature(obj = "DisplayPars"): gets a graphical parameter by name
initialize: signature(.Object = "DisplayPars"): This constructor should not be called directly.
setPar: signature(obj = "DisplayPars"): sets a graphical parameter - see the example below. Often it is easier to set the graphical parameter from within the gdObject.
show: signature(object = "DisplayPars"): prints current graphical parameters

The DisplayPars class should not be manipulated directly. The preferred method for interacting with the class can be seen in the example below.

James Bullard

showClass("DisplayPars")

if (interactive()) {
minbase = 10000
maxbase = 15000
mart <- useMart("ensembl", dataset = "scerevisiae_gene_ensembl")
genesplus <- new("GeneRegion", start = minbase, end = maxbase, biomart = mart,
                strand = "+", chromosome = "I", dp = DisplayPars(size = 2))
## plot it. 
gdPlot(list(genesplus, new("Title", title = "genes")), minbase, maxbase)

## to obtain a list of the current graphical parameters:
print(genesplus@dp)

## to set a parameter:
setPar(genesplus, "protein_coding", "pink")
gdPlot(list(genesplus, new("Title", title = "genes")), minbase, maxbase)
}