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events.go
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events.go
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package sdl
/*
#include "sdl_wrapper.h"
#include "events.h"
#if !SDL_VERSION_ATLEAST(2,0,9)
#define SDL_DISPLAYEVENT (0x150)
#endif
#if !SDL_VERSION_ATLEAST(2,0,2)
#define SDL_RENDER_TARGETS_RESET (0x2000)
#endif
#if !SDL_VERSION_ATLEAST(2,0,4)
#if defined(WARN_OUTDATED)
#pragma message("SDL_KEYMAPCHANGED is not supported before SDL 2.0.4")
#endif
#define SDL_KEYMAPCHANGED (0x304)
#if defined(WARN_OUTDATED)
#pragma message("SDL_AUDIODEVICEADDED is not supported before SDL 2.0.4")
#endif
#define SDL_AUDIODEVICEADDED (0x1100)
#if defined(WARN_OUTDATED)
#pragma message("SDL_AUDIODEVICEREMOVED is not supported before SDL 2.0.4")
#endif
#define SDL_AUDIODEVICEREMOVED (0x1101)
#if defined(WARN_OUTDATED)
#pragma message("SDL_RENDER_DEVICE_RESET is not supported before SDL 2.0.4")
#endif
#define SDL_RENDER_DEVICE_RESET (0x2001)
#if defined(WARN_OUTDATED)
#pragma message("SDL_AudioDeviceEvent is not supported before SDL 2.0.4")
#endif
typedef struct SDL_AudioDeviceEvent
{
Uint32 type;
Uint32 timestamp;
Uint32 which;
Uint8 iscapture;
Uint8 padding1;
Uint8 padding2;
Uint8 padding3;
} SDL_AudioDeviceEvent;
#endif
#if !SDL_VERSION_ATLEAST(2,0,5)
#if defined(WARN_OUTDATED)
#pragma message("SDL_DROPTEXT is not supported before SDL 2.0.5")
#endif
#define SDL_DROPTEXT (0x1001)
#if defined(WARN_OUTDATED)
#pragma message("SDL_DROPBEGIN is not supported before SDL 2.0.5")
#endif
#define SDL_DROPBEGIN (0x1002)
#if defined(WARN_OUTDATED)
#pragma message("SDL_DROPCOMPLETE is not supported before SDL 2.0.5")
#endif
#define SDL_DROPCOMPLETE (0x1003)
#endif
#if !SDL_VERSION_ATLEAST(2,0,9)
#define SDL_SENSORUPDATE (0x1200)
typedef struct SDL_SensorEvent {
Uint32 type;
Uint32 timestamp;
Sint32 which;
float data[6];
} SDL_SensorEvent;
#endif
#if !SDL_VERSION_ATLEAST(2,0,22)
#if defined(WARN_OUTDATED)
#pragma message("SDL_TEXTEDITING_EXT is not supported before SDL 2.0.22")
#endif
#define SDL_TEXTEDITING_EXT (0x305)
#endif
*/
import "C"
import (
"reflect"
"sync"
"unsafe"
)
var (
eventFilterCache EventFilter
eventWatches = make(map[EventWatchHandle]*eventFilterCallbackContext)
lastEventWatchHandleMutex sync.Mutex
lastEventWatchHandle EventWatchHandle
cevent C.SDL_Event
)
// Enumeration of the types of events that can be delivered.
// (https://wiki.libsdl.org/SDL_EventType)
const (
FIRSTEVENT = C.SDL_FIRSTEVENT // do not remove (unused)
// Application events
QUIT = C.SDL_QUIT // user-requested quit
// Android, iOS and WinRT events
APP_TERMINATING = C.SDL_APP_TERMINATING // OS is terminating the application
APP_LOWMEMORY = C.SDL_APP_LOWMEMORY // OS is low on memory; free some
APP_WILLENTERBACKGROUND = C.SDL_APP_WILLENTERBACKGROUND // application is entering background
APP_DIDENTERBACKGROUND = C.SDL_APP_DIDENTERBACKGROUND //application entered background
APP_WILLENTERFOREGROUND = C.SDL_APP_WILLENTERFOREGROUND // application is entering foreground
APP_DIDENTERFOREGROUND = C.SDL_APP_DIDENTERFOREGROUND // application entered foreground
// Display events
DISPLAYEVENT = C.SDL_DISPLAYEVENT // Display state change
// Window events
WINDOWEVENT = C.SDL_WINDOWEVENT // window state change
SYSWMEVENT = C.SDL_SYSWMEVENT // system specific event
// Keyboard events
KEYDOWN = C.SDL_KEYDOWN // key pressed
KEYUP = C.SDL_KEYUP // key released
TEXTEDITING = C.SDL_TEXTEDITING // keyboard text editing (composition)
TEXTINPUT = C.SDL_TEXTINPUT // keyboard text input
TEXTEDITING_EXT = C.SDL_TEXTEDITING_EXT // keyboard text editing (composition)
KEYMAPCHANGED = C.SDL_KEYMAPCHANGED // keymap changed due to a system event such as an input language or keyboard layout change (>= SDL 2.0.4)
// Mouse events
MOUSEMOTION = C.SDL_MOUSEMOTION // mouse moved
MOUSEBUTTONDOWN = C.SDL_MOUSEBUTTONDOWN // mouse button pressed
MOUSEBUTTONUP = C.SDL_MOUSEBUTTONUP // mouse button released
MOUSEWHEEL = C.SDL_MOUSEWHEEL // mouse wheel motion
// Joystick events
JOYAXISMOTION = C.SDL_JOYAXISMOTION // joystick axis motion
JOYBALLMOTION = C.SDL_JOYBALLMOTION // joystick trackball motion
JOYHATMOTION = C.SDL_JOYHATMOTION // joystick hat position change
JOYBUTTONDOWN = C.SDL_JOYBUTTONDOWN // joystick button pressed
JOYBUTTONUP = C.SDL_JOYBUTTONUP // joystick button released
JOYDEVICEADDED = C.SDL_JOYDEVICEADDED // joystick connected
JOYDEVICEREMOVED = C.SDL_JOYDEVICEREMOVED // joystick disconnected
// Game controller events
CONTROLLERAXISMOTION = C.SDL_CONTROLLERAXISMOTION // controller axis motion
CONTROLLERBUTTONDOWN = C.SDL_CONTROLLERBUTTONDOWN // controller button pressed
CONTROLLERBUTTONUP = C.SDL_CONTROLLERBUTTONUP // controller button released
CONTROLLERDEVICEADDED = C.SDL_CONTROLLERDEVICEADDED // controller connected
CONTROLLERDEVICEREMOVED = C.SDL_CONTROLLERDEVICEREMOVED // controller disconnected
CONTROLLERDEVICEREMAPPED = C.SDL_CONTROLLERDEVICEREMAPPED // controller mapping updated
// Touch events
FINGERDOWN = C.SDL_FINGERDOWN // user has touched input device
FINGERUP = C.SDL_FINGERUP // user stopped touching input device
FINGERMOTION = C.SDL_FINGERMOTION // user is dragging finger on input device
// Gesture events
DOLLARGESTURE = C.SDL_DOLLARGESTURE
DOLLARRECORD = C.SDL_DOLLARRECORD
MULTIGESTURE = C.SDL_MULTIGESTURE
// Clipboard events
CLIPBOARDUPDATE = C.SDL_CLIPBOARDUPDATE // the clipboard changed
// Drag and drop events
DROPFILE = C.SDL_DROPFILE // the system requests a file open
DROPTEXT = C.SDL_DROPTEXT // text/plain drag-and-drop event
DROPBEGIN = C.SDL_DROPBEGIN // a new set of drops is beginning (NULL filename)
DROPCOMPLETE = C.SDL_DROPCOMPLETE // current set of drops is now complete (NULL filename)
// Audio hotplug events
AUDIODEVICEADDED = C.SDL_AUDIODEVICEADDED // a new audio device is available (>= SDL 2.0.4)
AUDIODEVICEREMOVED = C.SDL_AUDIODEVICEREMOVED // an audio device has been removed (>= SDL 2.0.4)
// Sensor events
SENSORUPDATE = C.SDL_SENSORUPDATE // a sensor was updated
// Render events
RENDER_TARGETS_RESET = C.SDL_RENDER_TARGETS_RESET // the render targets have been reset and their contents need to be updated (>= SDL 2.0.2)
RENDER_DEVICE_RESET = C.SDL_RENDER_DEVICE_RESET // the device has been reset and all textures need to be recreated (>= SDL 2.0.4)
// These are for your use, and should be allocated with RegisterEvents()
USEREVENT = C.SDL_USEREVENT // a user-specified event
LASTEVENT = C.SDL_LASTEVENT // (only for bounding internal arrays)
)
// Actions for PeepEvents().
// (https://wiki.libsdl.org/SDL_PeepEvents)
const (
ADDEVENT = C.SDL_ADDEVENT // up to numevents events will be added to the back of the event queue
PEEKEVENT = C.SDL_PEEKEVENT // up to numevents events at the front of the event queue, within the specified minimum and maximum type, will be returned and will not be removed from the queue
GETEVENT = C.SDL_GETEVENT // up to numevents events at the front of the event queue, within the specified minimum and maximum type, will be returned and will be removed from the queue
)
// Toggles for different event state functions.
const (
QUERY = C.SDL_QUERY
IGNORE = C.SDL_IGNORE
DISABLE = C.SDL_DISABLE
ENABLE = C.SDL_ENABLE
)
// Event is a union of all event structures used in SDL.
// (https://wiki.libsdl.org/SDL_Event)
type Event interface {
GetType() uint32 // GetType returns the event type
GetTimestamp() uint32 // GetTimestamp returns the timestamp of the event
}
// CEvent is a union of all event structures used in SDL.
// (https://wiki.libsdl.org/SDL_Event)
type CEvent struct {
Type uint32
_ [52]byte // padding
}
// CommonEvent contains common event data.
// (https://wiki.libsdl.org/SDL_Event)
type CommonEvent struct {
Type uint32 // the event type
Timestamp uint32 // timestamp of the event
}
// GetType returns the event type.
func (e *CommonEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *CommonEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// DisplayEvent contains common event data.
// (https://wiki.libsdl.org/SDL_Event)
type DisplayEvent struct {
Type uint32 // the event type
Timestamp uint32 // timestamp of the event
Display uint32 // the associated display index
Event uint8 // TODO: (https://wiki.libsdl.org/SDL_DisplayEventID)
_ uint8 // padding
_ uint8 // padding
_ uint8 // padding
Data1 int32 // event dependent data
}
// GetType returns the event type.
func (e *DisplayEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *DisplayEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// WindowEvent contains window state change event data.
// (https://wiki.libsdl.org/SDL_WindowEvent)
type WindowEvent struct {
Type uint32 // WINDOWEVENT
Timestamp uint32 // timestamp of the event
WindowID uint32 // the associated window
Event uint8 // (https://wiki.libsdl.org/SDL_WindowEventID)
_ uint8 // padding
_ uint8 // padding
_ uint8 // padding
Data1 int32 // event dependent data
Data2 int32 // event dependent data
}
type cWindowEvent C.SDL_WindowEvent
// GetType returns the event type.
func (e *WindowEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *WindowEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// KeyboardEvent contains keyboard key down event information.
// (https://wiki.libsdl.org/SDL_KeyboardEvent)
type KeyboardEvent struct {
Type uint32 // KEYDOWN, KEYUP
Timestamp uint32 // timestamp of the event
WindowID uint32 // the window with keyboard focus, if any
State uint8 // PRESSED, RELEASED
Repeat uint8 // non-zero if this is a key repeat
_ uint8 // padding
_ uint8 // padding
Keysym Keysym // Keysym representing the key that was pressed or released
}
type cKeyboardEvent C.SDL_KeyboardEvent
// GetType returns the event type.
func (e *KeyboardEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *KeyboardEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// TextEditingEvent contains keyboard text editing event information.
// (https://wiki.libsdl.org/SDL_TextEditingEvent)
type TextEditingEvent struct {
Type uint32 // TEXTEDITING
Timestamp uint32 // timestamp of the event
WindowID uint32 // the window with keyboard focus, if any
Text [C.SDL_TEXTINPUTEVENT_TEXT_SIZE]byte // the null-terminated editing text in UTF-8 encoding
Start int32 // the location to begin editing from
Length int32 // the number of characters to edit from the start point
}
type cTextEditingEvent C.SDL_TextEditingEvent
// GetType returns the event type.
func (e *TextEditingEvent) GetType() uint32 {
return e.Type
}
// GetText returns the text as string
func (e *TextEditingEvent) GetText() string {
length := func(buf []byte) int {
for i := range buf {
if buf[i] == 0 {
return i
}
}
return 0
}(e.Text[:])
text := e.Text[:length]
return string(text)
}
// GetTimestamp returns the timestamp of the event.
func (e *TextEditingEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// TextInputEvent contains keyboard text input event information.
// (https://wiki.libsdl.org/SDL_TextInputEvent)
type TextInputEvent struct {
Type uint32 // TEXTINPUT
Timestamp uint32 // timestamp of the event
WindowID uint32 // the window with keyboard focus, if any
Text [C.SDL_TEXTINPUTEVENT_TEXT_SIZE]byte // the null-terminated input text in UTF-8 encoding
}
type cTextInputEvent C.SDL_TextInputEvent
// GetType returns the event type.
func (e *TextInputEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *TextInputEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// GetText returns the text as string
func (e *TextInputEvent) GetText() string {
length := func(buf []byte) int {
for i := range buf {
if buf[i] == 0 {
return i
}
}
return 0
}(e.Text[:])
text := e.Text[:length]
return string(text)
}
// MouseMotionEvent contains mouse motion event information.
// (https://wiki.libsdl.org/SDL_MouseMotionEvent)
type MouseMotionEvent struct {
Type uint32 // MOUSEMOTION
Timestamp uint32 // timestamp of the event
WindowID uint32 // the window with mouse focus, if any
Which uint32 // the mouse instance id, or TOUCH_MOUSEID
State uint32 // BUTTON_LEFT, BUTTON_MIDDLE, BUTTON_RIGHT, BUTTON_X1, BUTTON_X2
X int32 // X coordinate, relative to window
Y int32 // Y coordinate, relative to window
XRel int32 // relative motion in the X direction
YRel int32 // relative motion in the Y direction
}
type cMouseMotionEvent C.SDL_MouseMotionEvent
// GetType returns the event type.
func (e *MouseMotionEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *MouseMotionEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// MouseButtonEvent contains mouse button event information.
// (https://wiki.libsdl.org/SDL_MouseButtonEvent)
type MouseButtonEvent struct {
Type uint32 // MOUSEBUTTONDOWN, MOUSEBUTTONUP
Timestamp uint32 // timestamp of the event
WindowID uint32 // the window with mouse focus, if any
Which uint32 // the mouse instance id, or TOUCH_MOUSEID
Button uint8 // BUTTON_LEFT, BUTTON_MIDDLE, BUTTON_RIGHT, BUTTON_X1, BUTTON_X2
State uint8 // PRESSED, RELEASED
Clicks uint8 // 1 for single-click, 2 for double-click, etc. (>= SDL 2.0.2)
_ uint8 // padding
X int32 // X coordinate, relative to window
Y int32 // Y coordinate, relative to window
}
type cMouseButtonEvent C.SDL_MouseButtonEvent
// GetType returns the event type.
func (e *MouseButtonEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *MouseButtonEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// MouseWheelEvent contains mouse wheel event information.
// (https://wiki.libsdl.org/SDL_MouseWheelEvent)
type MouseWheelEvent struct {
Type uint32 // MOUSEWHEEL
Timestamp uint32 // timestamp of the event
WindowID uint32 // the window with mouse focus, if any
Which uint32 // the mouse instance id, or TOUCH_MOUSEID
X int32 // the amount scrolled horizontally, positive to the right and negative to the left
Y int32 // the amount scrolled vertically, positive away from the user and negative toward the user
Direction uint32 // MOUSEWHEEL_NORMAL, MOUSEWHEEL_FLIPPED (>= SDL 2.0.4)
PreciseX float32 // The amount scrolled horizontally, positive to the right and negative to the left, with float precision (added in 2.0.18)
PreciseY float32 // The amount scrolled vertically, positive away from the user and negative toward the user, with float precision (added in 2.0.18)
}
type cMouseWheelEvent C.SDL_MouseWheelEvent
// GetType returns the event type.
func (e *MouseWheelEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *MouseWheelEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// JoyAxisEvent contains joystick axis motion event information.
// (https://wiki.libsdl.org/SDL_JoyAxisEvent)
type JoyAxisEvent struct {
Type uint32 // JOYAXISMOTION
Timestamp uint32 // timestamp of the event
Which JoystickID // the instance id of the joystick that reported the event
Axis uint8 // the index of the axis that changed
_ uint8 // padding
_ uint8 // padding
_ uint8 // padding
Value int16 // the current position of the axis (range: -32768 to 32767)
_ uint16 // padding
}
type cJoyAxisEvent C.SDL_JoyAxisEvent
// GetType returns the event type.
func (e *JoyAxisEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *JoyAxisEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// JoyBallEvent contains joystick trackball motion event information.
// (https://wiki.libsdl.org/SDL_JoyBallEvent)
type JoyBallEvent struct {
Type uint32 // JOYBALLMOTION
Timestamp uint32 // timestamp of the event
Which JoystickID // the instance id of the joystick that reported the event
Ball uint8 // the index of the trackball that changed
_ uint8 // padding
_ uint8 // padding
_ uint8 // padding
XRel int16 // the relative motion in the X direction
YRel int16 // the relative motion in the Y direction
}
type cJoyBallEvent C.SDL_JoyBallEvent
// GetType returns the event type.
func (e *JoyBallEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *JoyBallEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// JoyHatEvent contains joystick hat position change event information.
// (https://wiki.libsdl.org/SDL_JoyHatEvent)
type JoyHatEvent struct {
Type uint32 // JOYHATMOTION
Timestamp uint32 // timestamp of the event
Which JoystickID // the instance id of the joystick that reported the event
Hat uint8 // the index of the hat that changed
Value uint8 // HAT_LEFTUP, HAT_UP, HAT_RIGHTUP, HAT_LEFT, HAT_CENTERED, HAT_RIGHT, HAT_LEFTDOWN, HAT_DOWN, HAT_RIGHTDOWN
_ uint8 // padding
_ uint8 // padding
}
type cJoyHatEvent C.SDL_JoyHatEvent
// GetType returns the event type.
func (e *JoyHatEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *JoyHatEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// JoyButtonEvent contains joystick button event information.
// (https://wiki.libsdl.org/SDL_JoyButtonEvent)
type JoyButtonEvent struct {
Type uint32 // JOYBUTTONDOWN, JOYBUTTONUP
Timestamp uint32 // timestamp of the event
Which JoystickID // the instance id of the joystick that reported the event
Button uint8 // the index of the button that changed
State uint8 // PRESSED, RELEASED
_ uint8 // padding
_ uint8 // padding
}
type cJoyButtonEvent C.SDL_JoyButtonEvent
// GetType returns the event type.
func (e *JoyButtonEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *JoyButtonEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// JoyDeviceAddedEvent contains joystick device event information.
// (https://wiki.libsdl.org/SDL_JoyDeviceEvent)
type JoyDeviceAddedEvent struct {
Type uint32 // JOYDEVICEADDED
Timestamp uint32 // the timestamp of the event
Which JoystickID // the joystick device index
}
// GetType returns the event type.
func (e *JoyDeviceAddedEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *JoyDeviceAddedEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// JoyDeviceRemovedEvent contains joystick device event information.
// (https://wiki.libsdl.org/SDL_JoyDeviceEvent)
type JoyDeviceRemovedEvent struct {
Type uint32 // JOYDEVICEREMOVED
Timestamp uint32 // the timestamp of the event
Which JoystickID // the instance id
}
// GetType returns the event type.
func (e *JoyDeviceRemovedEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *JoyDeviceRemovedEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// ControllerAxisEvent contains game controller axis motion event information.
// (https://wiki.libsdl.org/SDL_ControllerAxisEvent)
type ControllerAxisEvent struct {
Type uint32 // CONTROLLERAXISMOTION
Timestamp uint32 // the timestamp of the event
Which JoystickID // the joystick instance id
Axis uint8 // the controller axis (https://wiki.libsdl.org/SDL_GameControllerAxis)
_ uint8 // padding
_ uint8 // padding
_ uint8 // padding
Value int16 // the axis value (range: -32768 to 32767)
_ uint16 // padding
}
type cControllerAxisEvent C.SDL_ControllerAxisEvent
// GetType returns the event type.
func (e *ControllerAxisEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *ControllerAxisEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// ControllerButtonEvent contains game controller button event information.
// (https://wiki.libsdl.org/SDL_ControllerButtonEvent)
type ControllerButtonEvent struct {
Type uint32 // CONTROLLERBUTTONDOWN, CONTROLLERBUTTONUP
Timestamp uint32 // the timestamp of the event
Which JoystickID // the joystick instance id
Button uint8 // the controller button (https://wiki.libsdl.org/SDL_GameControllerButton)
State uint8 // PRESSED, RELEASED
_ uint8 // padding
_ uint8 // padding
}
type cControllerButtonEvent C.SDL_ControllerButtonEvent
// GetType returns the event type.
func (e *ControllerButtonEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *ControllerButtonEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// ControllerDeviceEvent contains controller device event information.
// (https://wiki.libsdl.org/SDL_ControllerDeviceEvent)
type ControllerDeviceEvent struct {
Type uint32 // CONTROLLERDEVICEADDED, CONTROLLERDEVICEREMOVED, SDL_CONTROLLERDEVICEREMAPPED
Timestamp uint32 // the timestamp of the event
Which JoystickID // the joystick device index for the CONTROLLERDEVICEADDED event or instance id for the CONTROLLERDEVICEREMOVED or CONTROLLERDEVICEREMAPPED event
}
type cControllerDeviceEvent C.SDL_ControllerDeviceEvent
// GetType returns the event type.
func (e *ControllerDeviceEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *ControllerDeviceEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// AudioDeviceEvent contains audio device event information.
// (https://wiki.libsdl.org/SDL_AudioDeviceEvent)
type AudioDeviceEvent struct {
Type uint32 // AUDIODEVICEADDED, AUDIODEVICEREMOVED
Timestamp uint32 // the timestamp of the event
Which uint32 // the audio device index for the AUDIODEVICEADDED event (valid until next GetNumAudioDevices() call), AudioDeviceID for the AUDIODEVICEREMOVED event
IsCapture uint8 // zero if an audio output device, non-zero if an audio capture device
_ uint8 // padding
_ uint8 // padding
_ uint8 // padding
}
type cAudioDeviceEvent C.SDL_AudioDeviceEvent
// GetType returns the event type.
func (e *AudioDeviceEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *AudioDeviceEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// TouchFingerEvent contains finger touch event information.
// (https://wiki.libsdl.org/SDL_TouchFingerEvent)
type TouchFingerEvent struct {
Type uint32 // FINGERMOTION, FINGERDOWN, FINGERUP
Timestamp uint32 // timestamp of the event
TouchID TouchID // the touch device id
FingerID FingerID // the finger id
X float32 // the x-axis location of the touch event, normalized (0...1)
Y float32 // the y-axis location of the touch event, normalized (0...1)
DX float32 // the distance moved in the x-axis, normalized (-1...1)
DY float32 // the distance moved in the y-axis, normalized (-1...1)
Pressure float32 // the quantity of pressure applied, normalized (0...1)
}
type cTouchFingerEvent C.SDL_TouchFingerEvent
// GetType returns the event type.
func (e *TouchFingerEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *TouchFingerEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// MultiGestureEvent contains multiple finger gesture event information.
// (https://wiki.libsdl.org/SDL_MultiGestureEvent)
type MultiGestureEvent struct {
Type uint32 // MULTIGESTURE
Timestamp uint32 // timestamp of the event
TouchID TouchID // the touch device id
DTheta float32 // the amount that the fingers rotated during this motion
DDist float32 // the amount that the fingers pinched during this motion
X float32 // the normalized center of gesture
Y float32 // the normalized center of gesture
NumFingers uint16 // the number of fingers used in the gesture
_ uint16 // padding
}
type cMultiGestureEvent C.SDL_MultiGestureEvent
// GetType returns the event type.
func (e *MultiGestureEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *MultiGestureEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// DollarGestureEvent contains complex gesture event information.
// (https://wiki.libsdl.org/SDL_DollarGestureEvent)
type DollarGestureEvent struct {
Type uint32 // DOLLARGESTURE, DOLLARRECORD
Timestamp uint32 // timestamp of the event
TouchID TouchID // the touch device id
GestureID GestureID // the unique id of the closest gesture to the performed stroke
NumFingers uint32 // the number of fingers used to draw the stroke
Error float32 // the difference between the gesture template and the actual performed gesture (lower error is a better match)
X float32 // the normalized center of gesture
Y float32 // the normalized center of gesture
}
type cDollarGestureEvent C.SDL_DollarGestureEvent
// GetType returns the event type.
func (e *DollarGestureEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *DollarGestureEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// DropEvent contains an event used to request a file open by the system.
// (https://wiki.libsdl.org/SDL_DropEvent)
type DropEvent struct {
Type uint32 // DROPFILE, DROPTEXT, DROPBEGIN, DROPCOMPLETE
Timestamp uint32 // timestamp of the event
File string // the file name
WindowID uint32 // the window that was dropped on, if any
}
type tDropEvent struct {
Type uint32
Timestamp uint32
File unsafe.Pointer
WindowID uint32
}
type cDropEvent C.SDL_DropEvent
// GetType returns the event type.
func (e *DropEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *DropEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// SensorEvent contains data from sensors such as accelerometer and gyroscope
// (https://wiki.libsdl.org/SDL_SensorEvent)
type SensorEvent struct {
Type uint32 // SDL_SENSORUPDATE
Timestamp uint32 // In milliseconds, populated using SDL_GetTicks()
Which int32 // The instance ID of the sensor
Data [6]float32 // Up to 6 values from the sensor - additional values can be queried using SDL_SensorGetData()
}
type cSensorEvent C.SDL_SensorEvent
// GetType returns the event type.
func (e *SensorEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *SensorEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// RenderEvent contains render event information.
// (https://wiki.libsdl.org/SDL_EventType)
type RenderEvent struct {
Type uint32 // the event type
Timestamp uint32 // timestamp of the event
}
// GetType returns the event type.
func (e *RenderEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *RenderEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// QuitEvent contains the "quit requested" event.
// (https://wiki.libsdl.org/SDL_QuitEvent)
type QuitEvent struct {
Type uint32 // QUIT
Timestamp uint32 // timestamp of the event
}
// GetType returns the event type.
func (e *QuitEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *QuitEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// OSEvent contains OS specific event information.
type OSEvent struct {
Type uint32 // the event type
Timestamp uint32 // timestamp of the event
}
// GetType returns the event type.
func (e *OSEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *OSEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// ClipboardEvent contains clipboard event information.
// (https://wiki.libsdl.org/SDL_EventType)
type ClipboardEvent struct {
Type uint32 // CLIPBOARDUPDATE
Timestamp uint32 // timestamp of the event
}
// GetType returns the event type.
func (e *ClipboardEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *ClipboardEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// UserEvent contains an application-defined event type.
// (https://wiki.libsdl.org/SDL_UserEvent)
type UserEvent struct {
Type uint32 // value obtained from RegisterEvents()
Timestamp uint32 // timestamp of the event
WindowID uint32 // the associated window, if any
Code int32 // user defined event code
Data1 unsafe.Pointer // user defined data pointer
Data2 unsafe.Pointer // user defined data pointer
}
type cUserEvent C.SDL_UserEvent
// GetType returns the event type.
func (e *UserEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *UserEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// SysWMEvent contains a video driver dependent system event.
// (https://wiki.libsdl.org/SDL_SysWMEvent)
type SysWMEvent struct {
Type uint32 // SYSWMEVENT
Timestamp uint32 // timestamp of the event
Msg *SysWMmsg // driver dependent data, defined in SDL_syswm.h
}
type cSysWMEvent C.SDL_SysWMEvent
// GetType returns the event type.
func (e *SysWMEvent) GetType() uint32 {
return e.Type
}
// GetTimestamp returns the timestamp of the event.
func (e *SysWMEvent) GetTimestamp() uint32 {
return e.Timestamp
}
// EventAction is the action to take in PeepEvents() function.
// (https://wiki.libsdl.org/SDL_PeepEvents)
type EventAction C.SDL_eventaction
// EventFilter is the function to call when an event happens.
// (https://wiki.libsdl.org/SDL_SetEventFilter)
type EventFilter interface {
FilterEvent(e Event, userdata interface{}) bool
}
type eventFilterFunc func(Event, interface{}) bool
type eventFilterCallbackContext struct {
filter EventFilter
handle EventWatchHandle
userdata interface{}
}
// EventWatchHandle is an event watch callback added with AddEventWatch().
type EventWatchHandle uintptr
func (action EventAction) c() C.SDL_eventaction {
return C.SDL_eventaction(action)
}
// PumpEvents pumps the event loop, gathering events from the input devices.
// (https://wiki.libsdl.org/SDL_PumpEvents)
func PumpEvents() {
C.SDL_PumpEvents()
}
// PeepEvents checks the event queue for messages and optionally return them.
// (https://wiki.libsdl.org/SDL_PeepEvents)
func PeepEvents(events []Event, action EventAction, minType, maxType uint32) (storedEvents int, err error) {
if events == nil {
return 0, nil
}
var _events []CEvent = make([]CEvent, len(events))
if action == ADDEVENT { // the contents of _events matter if they are to be added
for i := 0; i < len(events); i++ {
_events[i] = *cEvent(events[i])
}
}
_pevents := (*C.SDL_Event)(unsafe.Pointer(&_events[0]))
storedEvents = int(C.SDL_PeepEvents(_pevents, C.int(len(events)), action.c(), C.Uint32(minType), C.Uint32(maxType)))
if action != ADDEVENT { // put events into slice, events unchanged if action = ADDEVENT
for i := 0; i < storedEvents; i++ {
events[i] = goEvent(&_events[i])
}
}
if storedEvents < 0 {
err = GetError()
}
return
}
// HasEvent checks for the existence of certain event types in the event queue.
// (https://wiki.libsdl.org/SDL_HasEvent)
func HasEvent(type_ uint32) bool {
return C.SDL_HasEvent(C.Uint32(type_)) != 0
}
// HasEvents checks for the existence of a range of event types in the event queue.
// (https://wiki.libsdl.org/SDL_HasEvents)
func HasEvents(minType, maxType uint32) bool {
return C.SDL_HasEvents(C.Uint32(minType), C.Uint32(maxType)) != 0
}