mirror of
https://github.com/Relintai/sdl2_frt.git
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0db36f51aa
On Android available touch devices are now added with video initialization (like the keyboard). This fixes SDL_GetNumTouchDevices() returning 0 before any touch events happened although there is a touch screen available. The adding of touch devices after a touch event was received is still active to allow connecting devices later (if this is possible) and to provide a fallback if the new init did not work somehow. For the implementation JNI was used and API level 9 is required. There seems to be nothing in the Android NDK's input header (input.h) to implement everything on C side without communication with Java side.
128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#if SDL_VIDEO_DRIVER_ANDROID
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#include <android/log.h>
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#include "SDL_events.h"
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#include "../../events/SDL_mouse_c.h"
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#include "../../events/SDL_touch_c.h"
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#include "SDL_log.h"
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#include "SDL_androidtouch.h"
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#include "../../core/android/SDL_android.h"
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#define ACTION_DOWN 0
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#define ACTION_UP 1
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#define ACTION_MOVE 2
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#define ACTION_CANCEL 3
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#define ACTION_OUTSIDE 4
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/* The following two are deprecated but it seems they are still emitted (instead the corresponding ACTION_UP/DOWN) as of Android 3.2 */
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#define ACTION_POINTER_1_DOWN 5
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#define ACTION_POINTER_1_UP 6
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static SDL_FingerID leftFingerDown = 0;
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static void Android_GetWindowCoordinates(float x, float y,
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int *window_x, int *window_y)
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{
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int window_w, window_h;
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SDL_GetWindowSize(Android_Window, &window_w, &window_h);
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*window_x = (int)(x * window_w);
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*window_y = (int)(y * window_h);
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}
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void Android_InitTouch(void)
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{
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int i;
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int* ids;
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int number = Android_JNI_GetTouchDeviceIds(&ids);
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if (0 < number) {
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for (i = 0; i < number; ++i) {
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SDL_AddTouch((SDL_TouchID) ids[i], ""); /* no error handling */
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}
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SDL_free(ids);
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}
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}
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void Android_OnTouch(int touch_device_id_in, int pointer_finger_id_in, int action, float x, float y, float p)
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{
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SDL_TouchID touchDeviceId = 0;
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SDL_FingerID fingerId = 0;
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int window_x, window_y;
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if (!Android_Window) {
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return;
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}
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touchDeviceId = (SDL_TouchID)touch_device_id_in;
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if (SDL_AddTouch(touchDeviceId, "") < 0) {
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SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
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}
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fingerId = (SDL_FingerID)pointer_finger_id_in;
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switch (action) {
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case ACTION_DOWN:
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case ACTION_POINTER_1_DOWN:
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if (!leftFingerDown) {
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Android_GetWindowCoordinates(x, y, &window_x, &window_y);
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/* send moved event */
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SDL_SendMouseMotion(NULL, SDL_TOUCH_MOUSEID, 0, window_x, window_y);
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/* send mouse down event */
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SDL_SendMouseButton(NULL, SDL_TOUCH_MOUSEID, SDL_PRESSED, SDL_BUTTON_LEFT);
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leftFingerDown = fingerId;
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}
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SDL_SendTouch(touchDeviceId, fingerId, SDL_TRUE, x, y, p);
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break;
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case ACTION_MOVE:
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if (!leftFingerDown) {
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Android_GetWindowCoordinates(x, y, &window_x, &window_y);
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/* send moved event */
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SDL_SendMouseMotion(NULL, SDL_TOUCH_MOUSEID, 0, window_x, window_y);
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}
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SDL_SendTouchMotion(touchDeviceId, fingerId, x, y, p);
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break;
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case ACTION_UP:
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case ACTION_POINTER_1_UP:
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if (fingerId == leftFingerDown) {
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/* send mouse up */
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SDL_SendMouseButton(NULL, SDL_TOUCH_MOUSEID, SDL_RELEASED, SDL_BUTTON_LEFT);
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leftFingerDown = 0;
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}
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SDL_SendTouch(touchDeviceId, fingerId, SDL_FALSE, x, y, p);
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break;
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default:
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break;
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}
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}
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#endif /* SDL_VIDEO_DRIVER_ANDROID */
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/* vi: set ts=4 sw=4 expandtab: */
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