A constructor to create widgets for evaluating functions
This constructor creates a widget for collecting arguments for a function using a list to define the widget's components. When called with a function name a list is created on the fly which can be used as is, or modified as desired.
Either a list defining the widget or a function name as a
string. In the latter case, the defining list may be retrieved by
x= for initial variable name.
An instance of
Optional container to attach widget to
Currently ignored by
Which GUI toolkit to use
This widget provides an easy way to create dialogs that collect the
arguments for a function evaluation. When the OK button is clicked,
the arguments are collected and passed along to the function specified
action part of the list. When collecting the arguments,
empty strings are not passed along.
The easiest usage is to simply provide a function name and have
autogenerategeneric take a stab. However, in the long run it
might be better to use
autogenerategeneric to create an initial
list, and then modify this to adjust the widget's look.
The list contains several named components
The title for the widget
What help page is called
Either "text" or "graphic." Currently ignored.
Describes the type of variable. Either "univariate", "univariatetable","fileurl","bivariate", "model", "lattice", "lmer" or
NULL. This value is passed directly to
gvariables. For non-NULL values, the widget shows an appropriate area for collecting the main variable. For the model and lattice interfaces buttons allow editing of fields by subsequent dialogs.
An optional list with components
valuecontaining a name and value passed along to the constructor for the variable type. Useful to override default
If TRUE, creates box for collecting name for assigning output
a list with named components
ending. The arguments are collected and pasted together to form a string containing the R command to execute. These get put at the beginning and end of the string. A typical pair would be something like "prop.test(" and ")".
a list with named components. In the simplest usage the names are argument names, and the components are lists with entries that create the corresponding widget. The first such component is called
typeand is the name of a gWidget, such as
"gradio". Subsequent components are passed to this function using
geditnamedlistcan be used when the input is to be a list of values or a list of named values.
In the more complicated cases, these named components can be grouped into a list component. The name of this is then used to block the arguments. See the example.
svalue method returns the value of the list. This can be
used to retrieve the list that is created when the constructor is
called with a function name.
This function may be improved and the list defining it changed.
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## Not run: ## a sample list definition ## Save some typing by defining a list to be used more than once later TRUE.list <- list( type = "gradio", items = c("TRUE","FALSE") ) ## define a list for producing a histogram widget hist.list <- list( title = "hist()", help = "hist", action = list( beginning = "hist(", ending = ")" ), type = "graphic", # either text or graphic variableType = "univariate", # single variable arguments = list( adjustments = list( breaks= list( type="gdroplist", items=c("\"Sturges\"","\"Scott\"","\"Friedman-Diaconis\"") ), probability = TRUE.list, include.lowest = TRUE.list, right = TRUE.list, shading = list( density = list( type="gedit", text=NULL ), angle = list( type="gedit", coerce.with="as.numeric", text="45" ) ) ) ) ) ggenericwidget(hist.list, container=TRUE) ## or to autogenerate one ggenericwidget("boxplot.default", container=TRUE) ## End(Not run)
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