1.45.4 Get methods

display <-contained_in: -> display_manager

Implements visual<-contained_in protocol.

display <-contains: -> chain

Implements visual<-contains protocol.

display <-convert: any -> display

Convert a graphical to the display it is shown on, or accept an already-existing display object.

display <-depth: -> bits_per_pixel=int

Bits used to represent a display pixel. Returns 32 (RGBA) on all current platforms; preserved for compatibility with code that branched on colour depth.

display <-size: -> size

Pixel size of the display: equivalent to display<-area.

display <-width: -> int

Pixel width of the display: equivalent to display<-area.

display <-height: -> int

Pixel height of the display: equivalent to display<-area.

display <-dpi: -> size

Resolution of the display in dots per inch. Either the value set via display->dpi, the override from the class variable, or the value SDL reports for the monitor.

display <-system_theme: -> {light,dark}

The OS system theme as reported by SDL_GetSystemTheme(). Some platforms cannot report this reliably.

display <-theme: -> name

SWI-Prolog theme to load for swipl-win (epilog). Derived from the class variable; if that is @default, derived from display<-system_theme. Setting it to a non-@default value causes use_module(library(theme/Theme)) to be loaded.

display <-paste: which=[{primary,clipboard}] -> string

Return the textual content of the indicated selection (defaults to clipboard). Pair with display->copy and display->selection.

See also

- display->copy
- display<-selection

display <-selection: which=[name], target=[name], type=[type] -> any

Query the value of a system selection. which defaults to primary; common alternatives are clipboard and secondary. target is the requested MIME-like type (default text; utf8_string for explicit UTF-8). type is the xpce type the returned value should be coerced to via type<-check.

See also

display<-paste

display <-has_screen_keyboard_support: -> bool

@on when SDL reports the platform has an on-screen keyboard.

display <-screen_keyboard_shown: -> bool

@on when the on-screen keyboard is currently visible.