RGtk2: pangoGlyphStringXToIndex – R documentation

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pangoGlyphStringXToIndex

Description

Convert from x offset to character position. Character positions are computed by dividing up each cluster into equal portions. In scripts where positioning within a cluster is not allowed (such as Thai), the returned value may not be a valid cursor position; the caller must combine the result with the logical attributes for the text to compute the valid cursor position.

Usage

pangoGlyphStringXToIndex(object, text, analysis, x.pos)

Arguments

`object`	[`PangoGlyphString`] the glyphs returned from `pangoShape`
`text`	[char] the text for the run
`analysis`	[`PangoAnalysis`] the analysis information return from `pangoItemize`
`x.pos`	[integer] the x offset (in Pango units)

Value

A list containing the following elements:

`index`	[integer] location to store calculated byte index within `text`
`trailing`	[integer] location to store a boolean indicating whether the user clicked on the leading or trailing edge of the character.

Author(s)

Derived by RGtkGen from GTK+ documentation

RGtk2

R Bindings for Gtk 2.8.0 and Above

v2.20.36

GPL

Authors

Michael Lawrence <michafla@gene.com> and Duncan Temple Lang <duncan@wald.ucdavis.edu>

Initial release