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godot/platform/android/os_android.h
Pedro J. Estébanez de9d40a953 Implement universal translation of touch to mouse 
Now generating mouse events from touch is optional (on by default) and it's performed by `InputDefault` instead of having each OS abstraction doing it. (*)

The translation algorithm waits for a touch index to be pressed and tracks it translating its events to mouse events until it is raised, while ignoring other pointers.

Furthermore, to avoid an stuck "touch mouse", since not all platforms may report touches raised when the window is unfocused, it checks if touches are still down by the time it's focused again and if so it resets the state of the emulated mouse.

*: In the case of Windows, since it already provides touch-to-mouse translation by itself, "echo" mouse events are filtered out to have it working like the rest.

On X11 a little hack has been needed to avoid a case of a spurious mouse motion event that is generated during touch interaction.

Plus: Improve/fix tracking of current mouse position.

** Summary of changes to settings: **

- `display/window/handheld/emulate_touchscreen` becomes `input/pointing_devices/emulate_touch_from_mouse`
- New setting: `input/pointing_devices/emulate_mouse_from_touch`
2018-04-30 19:03:38 +02:00

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/*************************************************************************/
/* os_android.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef OS_ANDROID_H
#define OS_ANDROID_H
#include "audio_driver_jandroid.h"
#include "audio_driver_opensl.h"
#include "drivers/unix/os_unix.h"
#include "main/input_default.h"
#include "os/input.h"
#include "os/main_loop.h"
//#include "power_android.h"
#include "servers/audio_server.h"
#include "servers/visual/rasterizer.h"
#ifdef ANDROID_NATIVE_ACTIVITY
#include <android/log.h>
#include <android/sensor.h>
#include <android_native_app_glue.h>
#endif
typedef void (*GFXInitFunc)(void *ud, bool gl2);
typedef int (*OpenURIFunc)(const String &);
typedef String (*GetUserDataDirFunc)();
typedef String (*GetLocaleFunc)();
typedef String (*GetModelFunc)();
typedef int (*GetScreenDPIFunc)();
typedef String (*GetUniqueIDFunc)();
typedef void (*ShowVirtualKeyboardFunc)(const String &);
typedef void (*HideVirtualKeyboardFunc)();
typedef void (*SetScreenOrientationFunc)(int);
typedef String (*GetSystemDirFunc)(int);
typedef void (*VideoPlayFunc)(const String &);
typedef bool (*VideoIsPlayingFunc)();
typedef void (*VideoPauseFunc)();
typedef void (*VideoStopFunc)();
typedef void (*SetKeepScreenOnFunc)(bool p_enabled);
typedef void (*AlertFunc)(const String &, const String &);
typedef int (*VirtualKeyboardHeightFunc)();
class OS_Android : public OS_Unix {
public:
struct TouchPos {
int id;
Point2 pos;
};
enum {
JOY_EVENT_BUTTON = 0,
JOY_EVENT_AXIS = 1,
JOY_EVENT_HAT = 2
};
struct JoypadEvent {
int device;
int type;
int index;
bool pressed;
float value;
int hat;
};
private:
Vector<TouchPos> touch;
GFXInitFunc gfx_init_func;
void *gfx_init_ud;
bool use_gl2;
bool use_reload_hooks;
bool use_apk_expansion;
bool use_16bits_fbo;
VisualServer *visual_server;
mutable String data_dir_cache;
//AudioDriverAndroid audio_driver_android;
AudioDriverOpenSL audio_driver_android;
const char *gl_extensions;
InputDefault *input;
VideoMode default_videomode;
MainLoop *main_loop;
OpenURIFunc open_uri_func;
GetUserDataDirFunc get_user_data_dir_func;
GetLocaleFunc get_locale_func;
GetModelFunc get_model_func;
GetScreenDPIFunc get_screen_dpi_func;
ShowVirtualKeyboardFunc show_virtual_keyboard_func;
HideVirtualKeyboardFunc hide_virtual_keyboard_func;
VirtualKeyboardHeightFunc get_virtual_keyboard_height_func;
SetScreenOrientationFunc set_screen_orientation_func;
GetUniqueIDFunc get_unique_id_func;
GetSystemDirFunc get_system_dir_func;
VideoPlayFunc video_play_func;
VideoIsPlayingFunc video_is_playing_func;
VideoPauseFunc video_pause_func;
VideoStopFunc video_stop_func;
SetKeepScreenOnFunc set_keep_screen_on_func;
AlertFunc alert_func;
//power_android *power_manager;
public:
// functions used by main to initialize/deintialize the OS
virtual int get_video_driver_count() const;
virtual const char *get_video_driver_name(int p_driver) const;
virtual int get_audio_driver_count() const;
virtual const char *get_audio_driver_name(int p_driver) const;
virtual void initialize_core();
virtual Error initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver);
virtual void set_main_loop(MainLoop *p_main_loop);
virtual void delete_main_loop();
virtual void finalize();
typedef int64_t ProcessID;
static OS *get_singleton();
virtual void alert(const String &p_alert, const String &p_title = "ALERT!");
virtual Error open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path = false);
virtual void set_mouse_show(bool p_show);
virtual void set_mouse_grab(bool p_grab);
virtual bool is_mouse_grab_enabled() const;
virtual Point2 get_mouse_position() const;
virtual int get_mouse_button_state() const;
virtual void set_window_title(const String &p_title);
//virtual void set_clipboard(const String& p_text);
//virtual String get_clipboard() const;
virtual void set_video_mode(const VideoMode &p_video_mode, int p_screen = 0);
virtual VideoMode get_video_mode(int p_screen = 0) const;
virtual void get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen = 0) const;
virtual void set_keep_screen_on(bool p_enabled);
virtual Size2 get_window_size() const;
virtual String get_name();
virtual MainLoop *get_main_loop() const;
virtual bool can_draw() const;
virtual void set_cursor_shape(CursorShape p_shape);
virtual void set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot);
void main_loop_begin();
bool main_loop_iterate();
void main_loop_request_go_back();
void main_loop_end();
void main_loop_focusout();
void main_loop_focusin();
virtual bool has_touchscreen_ui_hint() const;
virtual bool has_virtual_keyboard() const;
virtual void show_virtual_keyboard(const String &p_existing_text, const Rect2 &p_screen_rect = Rect2());
virtual void hide_virtual_keyboard();
virtual int get_virtual_keyboard_height() const;
void set_opengl_extensions(const char *p_gl_extensions);
void set_display_size(Size2 p_size);
void reload_gfx();
void set_context_is_16_bits(bool p_is_16);
void set_need_reload_hooks(bool p_needs_them);
virtual void set_screen_orientation(ScreenOrientation p_orientation);
virtual Error shell_open(String p_uri);
virtual String get_user_data_dir() const;
virtual String get_resource_dir() const;
virtual String get_locale() const;
virtual String get_model_name() const;
virtual int get_screen_dpi(int p_screen = 0) const;
virtual String get_unique_id() const;
virtual String get_system_dir(SystemDir p_dir) const;
void process_accelerometer(const Vector3 &p_accelerometer);
void process_gravity(const Vector3 &p_gravity);
void process_magnetometer(const Vector3 &p_magnetometer);
void process_gyroscope(const Vector3 &p_gyroscope);
void process_touch(int p_what, int p_pointer, const Vector<TouchPos> &p_points);
void process_joy_event(JoypadEvent p_event);
void process_event(Ref<InputEvent> p_event);
void init_video_mode(int p_video_width, int p_video_height);
virtual Error native_video_play(String p_path, float p_volume);
virtual bool native_video_is_playing();
virtual void native_video_pause();
virtual void native_video_stop();
virtual bool is_joy_known(int p_device);
virtual String get_joy_guid(int p_device) const;
void joy_connection_changed(int p_device, bool p_connected, String p_name);
virtual bool _check_internal_feature_support(const String &p_feature);
OS_Android(GFXInitFunc p_gfx_init_func, void *p_gfx_init_ud, OpenURIFunc p_open_uri_func, GetUserDataDirFunc p_get_user_data_dir_func, GetLocaleFunc p_get_locale_func, GetModelFunc p_get_model_func, GetScreenDPIFunc p_get_screen_dpi_func, ShowVirtualKeyboardFunc p_show_vk, HideVirtualKeyboardFunc p_hide_vk, VirtualKeyboardHeightFunc p_vk_height_func, SetScreenOrientationFunc p_screen_orient, GetUniqueIDFunc p_get_unique_id, GetSystemDirFunc p_get_sdir_func, VideoPlayFunc p_video_play_func, VideoIsPlayingFunc p_video_is_playing_func, VideoPauseFunc p_video_pause_func, VideoStopFunc p_video_stop_func, SetKeepScreenOnFunc p_set_keep_screen_on_func, AlertFunc p_alert_func, bool p_use_apk_expansion);
~OS_Android();
};
#endif
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