lambda-term 1.10.1 · OCaml Package

Widgets for creating applications

Base class

class t : string -> object ... end

The base class. The parameter is the initial resource class. The resource class is the first part of all resource keys used by the widget.

Labels

class label : string -> object ... end

A widget displaying a text.

Containers

exception Out_of_range

class type box = object ... end

Type of widgets displaying a list of widget.

class hbox : box

A widget displaying a list of widgets, listed horizontally.

class vbox : box

A widget displaying a list of widgets, listed vertically.

class frame : object ... end

A widget displayiing another widget in a box.

class modal_frame : object ... end

A widget displaying a frame around child widget. Unlike frame, the child widget is not expanded to take all available space; instead the child is centered and frame is drawn around it. This is a utility class for creation of modal dialogs and similar widgets.

Lines

class hline : t

A horizontal line.

class vline : t

A vertical line.

Buttons

class button : string -> object ... end

Normal button.

class checkbutton : string -> bool -> object ... end

Checkbutton. A button that can be in active or inactive state.

class type 'a radio = object ... end

class 'a radiogroup : object ... end

Radio group.

class 'a radiobutton : 'a radiogroup -> string -> 'a -> object ... end

Radiobutton. The button which implements radio object contract, so can be added to radiogroup.

Running in a terminal

val run : 
  LTerm.t ->
  ?save_state:bool ->
  ?load_resources:bool ->
  ?resources_file:string ->
  t ->
  'a Lwt.t ->
  'a Lwt.t

run term ?save_state widget w runs on the given terminal using widget as main widget. It returns when w terminates. If save_state is true (the default) then the state of the terminal is saved and restored when w terminates.

If load_resources is true (the default) then resources_file (which default to ".lambda-termrc" in the home directory) is loaded and the result is set to w.

val run_modal : 
  LTerm.t ->
  ?save_state:bool ->
  ?load_resources:bool ->
  ?resources_file:string ->
  t Lwt_react.event ->
  unit Lwt_react.event ->
  t ->
  'a Lwt.t ->
  'a Lwt.t

This function works in the same way as run but also takes two Lwt_react.event parameters. The first one should contain LTerm_widget.t widget and makes it new topmost layer in UI. The second message removes the topmost level from UI. All layers are redrawn, from bottom to up, but only the topmost layer gets keyboard events delivered to it. This allows to implement things like modal dialogs.

val prepare_simple_run : 
  unit ->
  (t ->
  'a Lwt.t)
  * (t ->
  unit ->
  unit)
  * (?step:React.step ->
  unit ->
  unit)
  * ('a ->
  unit)

prepare_simple_run () returns a tuple (do_run, push_layer, pop_layer, exit) -- functions useful for creating simple UI.

do_run w where w is a widget runs the given widget in a terminal over stdout, loading resources from .lambda-termrc, saving state and restoring it on exit from ui. Example: do_run my_frame

push_layer w where w is a widget is a callback to add w as a new modal layer to UI. Example: button#on_click (push_layer my_modal_dialog).

pop_layer is a callback to destroy the topmost modal layer. Example: cancel_button#on_click pop_layer.

exit is a callback to exit the UI. Example: exit_button#on_click exit