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authorDavid Thompson <dthompson@vistahigherlearning.com>2016-12-30 11:19:48 -0500
committerDavid Thompson <dthompson@vistahigherlearning.com>2016-12-30 15:51:58 -0500
commitb833f588b3d9528e7fc650d841ee7a46b6c0ba78 (patch)
treee0a393cca717153abd6bbe0e59505f1901393469
parent2fb7f399f322122f2d5e5f436673fe386242505e (diff)
Add bindings for text input event handling.
* sdl2/bindings.scm (sdl-start-text-input, sdl-stop-text-input, sdl-is-text-input-active): New procedures. * sdl2/events.scm (<text-input-event>): New record type. (make-text-input-event, text-input-event?, text-input-event-timestamp, text-input-event-window-id, text-input-event-text, parse-text-input-event): New procedures. * sdl2/input/text.scm: New file. * Makefile.am (SOURCES): Add it.
-rw-r--r--Makefile.am5
-rw-r--r--sdl2/bindings.scm16
-rw-r--r--sdl2/events.scm32
-rw-r--r--sdl2/input/text.scm43
4 files changed, 92 insertions, 4 deletions
diff --git a/Makefile.am b/Makefile.am
index 5428b13..9bddc71 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,5 @@
# guile-sdl2 --- FFI bindings for SDL2
-# Copyright © 2015 David Thompson <davet@gnu.org>
+# Copyright © 2015, 2016 David Thompson <davet@gnu.org>
#
# This file is part of guile-sdl2.
#
@@ -47,7 +47,8 @@ SOURCES = \
sdl2/surface.scm \
sdl2/render.scm \
sdl2/video.scm \
- sdl2/events.scm
+ sdl2/events.scm \
+ sdl2/input/text.scm
if WITH_LIBSDL2_IMAGE
diff --git a/sdl2/bindings.scm b/sdl2/bindings.scm
index e3167a0..e48ce64 100644
--- a/sdl2/bindings.scm
+++ b/sdl2/bindings.scm
@@ -1,5 +1,5 @@
;;; guile-sdl2 --- FFI bindings for SDL2
-;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;; Copyright © 2015, 2016 David Thompson <davet@gnu.org>
;;;
;;; This file is part of guile-sdl2.
;;;
@@ -817,6 +817,20 @@ RETURN-TYPE and accept arguments of ARG-TYPES."
;;;
+;;; Text Input
+;;;
+
+(define-foreign sdl-start-text-input
+ void "SDL_StartTextInput" '())
+
+(define-foreign sdl-stop-text-input
+ void "SDL_StopTextInput" '())
+
+(define-foreign sdl-is-text-input-active
+ sdl-bool "SDL_IsTextInputActive" '())
+
+
+;;;
;;; Mouse
;;;
diff --git a/sdl2/events.scm b/sdl2/events.scm
index aa08fff..c9e391b 100644
--- a/sdl2/events.scm
+++ b/sdl2/events.scm
@@ -1,5 +1,5 @@
;;; guile-sdl2 --- FFI bindings for SDL2
-;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;; Copyright © 2015, 2016 David Thompson <davet@gnu.org>
;;;
;;; This file is part of guile-sdl2.
;;;
@@ -70,6 +70,12 @@
keyboard-event-scancode
keyboard-event-modifiers
+ make-text-input-event
+ text-input-event?
+ text-input-event-timestamp
+ text-input-event-window-id
+ text-input-event-text
+
make-mouse-button-event
mouse-button-event?
mouse-button-down-event?
@@ -812,6 +818,28 @@
;;;
+;;; Text Input
+;;;
+
+(define-record-type <text-input-event>
+ (make-text-input-event timestamp window-id text)
+ text-input-event?
+ (timestamp text-input-event-timestamp)
+ (window-id text-input-event-window-id)
+ (text text-input-event-text))
+
+(define (parse-text-input-event ptr)
+ ;; Separate the first 3 struct fields which are all uint32s from the
+ ;; 32-byte UTF-8 encoded character buffer at the end of the struct.
+ (let* ((len (* (sizeof uint32) 3))
+ (bv (pointer->bytevector ptr len))
+ (timestamp (u32vector-ref bv 1))
+ (window-id (u32vector-ref bv 2))
+ (text (pointer->string (make-pointer (+ (pointer-address ptr) len)))))
+ (make-text-input-event timestamp window-id text)))
+
+
+;;;
;;; Mouse
;;;
@@ -991,6 +1019,8 @@
((or (= type ffi:SDL_KEYDOWN)
(= type ffi:SDL_KEYUP))
(parse-keyboard-event ptr))
+ ((= type ffi:SDL_TEXTINPUT)
+ (parse-text-input-event ptr))
((or (= type ffi:SDL_MOUSEBUTTONDOWN)
(= type ffi:SDL_MOUSEBUTTONUP))
(parse-mouse-button-event ptr))
diff --git a/sdl2/input/text.scm b/sdl2/input/text.scm
new file mode 100644
index 0000000..ea441d5
--- /dev/null
+++ b/sdl2/input/text.scm
@@ -0,0 +1,43 @@
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2016 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-sdl2. If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Unicode text input.
+;;
+;;; Code:
+
+(define-module (sdl2 input text)
+ #:use-module (system foreign)
+ #:use-module ((sdl2 bindings) #:prefix ffi:)
+ #:export (start-text-input
+ stop-text-input
+ text-input-active?))
+
+(define (start-text-input)
+ "Enable text input events."
+ (ffi:sdl-start-text-input))
+
+(define (stop-text-input)
+ "Disable text input events."
+ (ffi:sdl-stop-text-input))
+
+(define (text-input-active?)
+ "Return #t if text input events are enabled."
+ (= (ffi:sdl-is-text-input-active) 1))