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virtualx-engine/platform/x11/os_x11.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_x11.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_X11_H
#define OS_X11_H
#include "context_gl_x11.h"
#include "crash_handler_x11.h"
#include "drivers/unix/os_unix.h"
#include "os/input.h"
#include "servers/visual_server.h"
//#include "servers/visual/visual_server_wrap_mt.h"
#include "drivers/alsa/audio_driver_alsa.h"
#include "drivers/pulseaudio/audio_driver_pulseaudio.h"
#include "joypad_linux.h"
#include "main/input_default.h"
#include "power_x11.h"
#include "servers/audio_server.h"
#include "servers/visual/rasterizer.h"
#include <X11/Xcursor/Xcursor.h>
#include <X11/Xlib.h>
#include <X11/extensions/Xrandr.h>
#include <X11/keysym.h>
#ifdef TOUCH_ENABLED
#include <X11/extensions/XInput2.h>
#endif
// Hints for X11 fullscreen
typedef struct {
unsigned long flags;
unsigned long functions;
unsigned long decorations;
long inputMode;
unsigned long status;
} Hints;
typedef struct _xrr_monitor_info {
Atom name;
Bool primary;
Bool automatic;
int noutput;
int x;
int y;
int width;
int height;
int mwidth;
int mheight;
RROutput *outputs;
} xrr_monitor_info;
#undef CursorShape
/**
@author Juan Linietsky <reduzio@gmail.com>
*/
class OS_X11 : public OS_Unix {
Atom wm_delete;
Atom xdnd_enter;
Atom xdnd_position;
Atom xdnd_status;
Atom xdnd_action_copy;
Atom xdnd_drop;
Atom xdnd_finished;
Atom xdnd_selection;
Atom requested;
int xdnd_version;
#if defined(OPENGL_ENABLED)
ContextGL_X11 *context_gl;
#endif
//Rasterizer *rasterizer;
VisualServer *visual_server;
VideoMode current_videomode;
List<String> args;
Window x11_window;
Window xdnd_source_window;
MainLoop *main_loop;
::Display *x11_display;
char *xmbstring;
int xmblen;
unsigned long last_timestamp;
::Time last_keyrelease_time;
::XIC xic;
::XIM xim;
::XIMStyle xim_style;
static void xim_destroy_callback(::XIM im, ::XPointer client_data,
::XPointer call_data);
Point2i last_mouse_pos;
bool last_mouse_pos_valid;
Point2i last_click_pos;
uint64_t last_click_ms;
uint32_t last_button_state;
#ifdef TOUCH_ENABLED
struct {
int opcode;
Vector<int> devices;
XIEventMask event_mask;
Map<int, Vector2> state;
Vector2 mouse_pos_to_filter;
} touch;
#endif
unsigned int get_mouse_button_state(unsigned int p_x11_state);
void get_key_modifier_state(unsigned int p_x11_state, Ref<InputEventWithModifiers> state);
MouseMode mouse_mode;
Point2i center;
void handle_key_event(XKeyEvent *p_event, bool p_echo = false);
void process_xevents();
virtual void delete_main_loop();
IP_Unix *ip_unix;
bool force_quit;
bool minimized;
bool window_has_focus;
bool do_mouse_warp;
const char *cursor_theme;
int cursor_size;
XcursorImage *img[CURSOR_MAX];
Cursor cursors[CURSOR_MAX];
Cursor null_cursor;
CursorShape current_cursor;
InputDefault *input;
#ifdef JOYDEV_ENABLED
JoypadLinux *joypad;
#endif
#ifdef ALSA_ENABLED
AudioDriverALSA driver_alsa;
#endif
#ifdef PULSEAUDIO_ENABLED
AudioDriverPulseAudio driver_pulseaudio;
#endif
Atom net_wm_icon;
PowerX11 *power_manager;
CrashHandler crash_handler;
int audio_driver_index;
unsigned int capture_idle;
bool maximized;
//void set_wm_border(bool p_enabled);
void set_wm_fullscreen(bool p_enabled);
void set_wm_above(bool p_enabled);
typedef xrr_monitor_info *(*xrr_get_monitors_t)(Display *dpy, Window window, Bool get_active, int *nmonitors);
typedef void (*xrr_free_monitors_t)(xrr_monitor_info *monitors);
xrr_get_monitors_t xrr_get_monitors;
xrr_free_monitors_t xrr_free_monitors;
void *xrandr_handle;
Bool xrandr_ext_ok;
protected:
virtual void initialize_core();
virtual Error initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver);
virtual void finalize();
virtual void set_main_loop(MainLoop *p_main_loop);
void _window_changed(XEvent *event);
bool is_window_maximize_allowed();
public:
virtual String get_name();
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 set_mouse_mode(MouseMode p_mode);
MouseMode get_mouse_mode() const;
virtual void warp_mouse_position(const Point2 &p_to);
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_icon(const Ref<Image> &p_icon);
virtual MainLoop *get_main_loop() const;
virtual bool can_draw() const;
virtual void set_clipboard(const String &p_text);
virtual String get_clipboard() const;
virtual void release_rendering_thread();
virtual void make_rendering_thread();
virtual void swap_buffers();
virtual String get_config_path() const;
virtual String get_data_path() const;
virtual String get_cache_path() const;
virtual String get_system_dir(SystemDir p_dir) const;
virtual Error shell_open(String p_uri);
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 int get_screen_count() const;
virtual int get_current_screen() const;
virtual void set_current_screen(int p_screen);
virtual Point2 get_screen_position(int p_screen = -1) const;
virtual Size2 get_screen_size(int p_screen = -1) const;
virtual int get_screen_dpi(int p_screen = -1) const;
virtual Point2 get_window_position() const;
virtual void set_window_position(const Point2 &p_position);
virtual Size2 get_window_size() const;
virtual Size2 get_real_window_size() const;
virtual void set_window_size(const Size2 p_size);
virtual void set_window_fullscreen(bool p_enabled);
virtual bool is_window_fullscreen() const;
virtual void set_window_resizable(bool p_enabled);
virtual bool is_window_resizable() const;
virtual void set_window_minimized(bool p_enabled);
virtual bool is_window_minimized() const;
virtual void set_window_maximized(bool p_enabled);
virtual bool is_window_maximized() const;
virtual void set_window_always_on_top(bool p_enabled);
virtual bool is_window_always_on_top() const;
virtual void request_attention();
virtual void set_borderless_window(bool p_borderless);
virtual bool get_borderless_window();
virtual void set_ime_position(const Point2 &p_pos);
virtual String get_unique_id() const;
virtual void move_window_to_foreground();
virtual void alert(const String &p_alert, const String &p_title = "ALERT!");
virtual bool is_joy_known(int p_device);
virtual String get_joy_guid(int p_device) const;
virtual void set_context(int p_context);
virtual void _set_use_vsync(bool p_enable);
//virtual bool is_vsync_enabled() const;
virtual OS::PowerState get_power_state();
virtual int get_power_seconds_left();
virtual int get_power_percent_left();
virtual bool _check_internal_feature_support(const String &p_feature);
virtual void force_process_input();
void run();
void disable_crash_handler();
bool is_disable_crash_handler() const;
virtual Error move_to_trash(const String &p_path);
virtual LatinKeyboardVariant get_latin_keyboard_variant() const;
OS_X11();
};
#endif
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