prefer_dimension: Preferred height and width of layers with texts
In ggobi/cranvas: Interactive statistical graphics based on Qt

Description Usage Arguments Details Value Author(s) Examples

The height and width of a layer which draws texts often involves with the number of line breaks ('\n') in the texts. These two functions give the preferred height and width of a layer as a rule of thumb.

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prefer_height(text)

prefer_width(text, horizontal = TRUE)

`text`	the character vector to be drawn in the layer
`horizontal`	logical: the text is drawn horizontally (`TRUE`) or vertically (`FALSE`)

Usually the height and width of the title layer and x- and y-axis layers need to be adjusted dynamically.

The height or width (numeric).

Yihui Xie <http://yihui.name>

prefer_height("a label")
prefer_height("this is\na label")
prefer_width("abc")
prefer_width("a long long label")
prefer_width("line\nbreaks")  # 'breaks' dominates the width because it is wider
prefer_width("multiple\nvertical\nlines", horizontal = FALSE)