author Sam Lantinga
Wed, 03 Oct 2012 20:49:16 -0700
changeset 6555 f2c03c06d987
parent 6330 0fa55ca2efdd
child 6885 700f1b25f77f
permissions -rw-r--r--
Fixed bug 1614 - SDL for Android does not implement TextInput API

Andrey Isakov 2012-10-03 08:30:25 PDT

I've found out in the process of porting one OS project to Android/SDL2 that
there is no support for TextInput events/APIs on Android.
So I implemented some kind of initial support of that feature, and at the very
least it seems to work fine with latin chars input with soft and hardware
keyboards on my Moto Milestone2. I've also tried playing around with more
complex IMEs, like japanese, logging the process and it seemed to work too. I'm
not sure since the app itself I am working on does not have support for
non-latin input.

The main point of the patch is to place a fake input view in the region
specified by SDL_SetTextInputRect and create a custom InputConnection for it.
The reason to make it a separate view is to support Android's pan&scan on input
feature properly. For details please refer to
Even though the manual states that SetTextInputRect is used to determine the
IME variants position, I thought this would be a proper use for this too.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2012 Sam Lantinga <>
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "SDL_config.h"
    23 #ifndef _SDL_androidvideo_h
    24 #define _SDL_androidvideo_h
    26 #include "SDL_mutex.h"
    27 #include "SDL_rect.h"
    28 #include "../SDL_sysvideo.h"
    30 /* Called by the JNI layer when the screen changes size or format */
    31 extern void Android_SetScreenResolution(int width, int height, Uint32 format);
    33 /* Private display data */
    35 typedef struct SDL_VideoData
    36 {
    37     SDL_Rect        textRect;
    38 } SDL_VideoData;
    40 extern int Android_ScreenWidth;
    41 extern int Android_ScreenHeight;
    42 extern Uint32 Android_ScreenFormat;
    43 extern SDL_sem *Android_PauseSem, *Android_ResumeSem;
    44 extern SDL_Window *Android_Window;
    47 #endif /* _SDL_androidvideo_h */
    49 /* vi: set ts=4 sw=4 expandtab: */