Module Graphics_js

module Graphics_js: sig .. end

include Graphics

type context 

Initializations

type of a graphic context

val open_graph : string -> unit

Open a graphics window. The graphics window is cleared and the current point is set to (0, 0). The string argument is used to pass optional information on the desired graphics mode, the graphics window size, and so on. Specification can be found at http://www.w3schools.com/jsref/met_win_open.asp. Note: an extra specification is availble, "target", to specifies the target attribute or the name of the window.

val open_canvas : Dom_html.canvasElement Js.t -> unit

use a canvas to setup the current context

val get_context : unit -> context

Get the current context

val set_context : context -> unit

Set the current context

val loop : event list -> (status -> unit) -> unit

Mouse and keyboard events

Loops forever and listen to the given events. Those events automatically returns a status record, which is used by the function given in argument.

val mouse_pos : unit -> (int * int) Lwt.t

Mouse and keyboard polling

Return the position of the mouse cursor, relative to the graphics window. If the mouse cursor is outside of the graphics window, mouse_pos() returns a point outside of the range 0..size_x()-1, 0..size_y()-1.

val button_down : unit -> bool Lwt.t

Return true if the mouse button is pressed, false otherwise.

val read_key : unit -> char Lwt.t

Wait for a key to be pressed, and return the corresponding character. Keypresses are queued.