SDL  2.0
SDL_mouse.h File Reference
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_video.h"
#include "begin_code.h"
#include "close_code.h"
+ Include dependency graph for SDL_mouse.h:
+ This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros

#define SDL_BUTTON(X)   (1 << ((X)-1))
 
#define SDL_BUTTON_LEFT   1
 
#define SDL_BUTTON_MIDDLE   2
 
#define SDL_BUTTON_RIGHT   3
 
#define SDL_BUTTON_X1   4
 
#define SDL_BUTTON_X2   5
 
#define SDL_BUTTON_LMASK   SDL_BUTTON(SDL_BUTTON_LEFT)
 
#define SDL_BUTTON_MMASK   SDL_BUTTON(SDL_BUTTON_MIDDLE)
 
#define SDL_BUTTON_RMASK   SDL_BUTTON(SDL_BUTTON_RIGHT)
 
#define SDL_BUTTON_X1MASK   SDL_BUTTON(SDL_BUTTON_X1)
 
#define SDL_BUTTON_X2MASK   SDL_BUTTON(SDL_BUTTON_X2)
 

Typedefs

typedef struct SDL_Cursor SDL_Cursor
 

Enumerations

enum  SDL_SystemCursor {
  SDL_SYSTEM_CURSOR_ARROW ,
  SDL_SYSTEM_CURSOR_IBEAM ,
  SDL_SYSTEM_CURSOR_WAIT ,
  SDL_SYSTEM_CURSOR_CROSSHAIR ,
  SDL_SYSTEM_CURSOR_WAITARROW ,
  SDL_SYSTEM_CURSOR_SIZENWSE ,
  SDL_SYSTEM_CURSOR_SIZENESW ,
  SDL_SYSTEM_CURSOR_SIZEWE ,
  SDL_SYSTEM_CURSOR_SIZENS ,
  SDL_SYSTEM_CURSOR_SIZEALL ,
  SDL_SYSTEM_CURSOR_NO ,
  SDL_SYSTEM_CURSOR_HAND ,
  SDL_NUM_SYSTEM_CURSORS
}
 Cursor types for SDL_CreateSystemCursor(). More...
 
enum  SDL_MouseWheelDirection {
  SDL_MOUSEWHEEL_NORMAL ,
  SDL_MOUSEWHEEL_FLIPPED
}
 Scroll direction types for the Scroll event. More...
 

Functions

SDL_WindowSDL_GetMouseFocus (void)
 
Uint32 SDL_GetMouseState (int *x, int *y)
 
Uint32 SDL_GetGlobalMouseState (int *x, int *y)
 
Uint32 SDL_GetRelativeMouseState (int *x, int *y)
 
void SDL_WarpMouseInWindow (SDL_Window *window, int x, int y)
 
int SDL_WarpMouseGlobal (int x, int y)
 
int SDL_SetRelativeMouseMode (SDL_bool enabled)
 
int SDL_CaptureMouse (SDL_bool enabled)
 
SDL_bool SDL_GetRelativeMouseMode (void)
 
SDL_CursorSDL_CreateCursor (const Uint8 *data, const Uint8 *mask, int w, int h, int hot_x, int hot_y)
 
SDL_CursorSDL_CreateColorCursor (SDL_Surface *surface, int hot_x, int hot_y)
 
SDL_CursorSDL_CreateSystemCursor (SDL_SystemCursor id)
 
void SDL_SetCursor (SDL_Cursor *cursor)
 
SDL_CursorSDL_GetCursor (void)
 
SDL_CursorSDL_GetDefaultCursor (void)
 
void SDL_FreeCursor (SDL_Cursor *cursor)
 
int SDL_ShowCursor (int toggle)
 

Detailed Description

Include file for SDL mouse event handling.

Definition in file SDL_mouse.h.

Macro Definition Documentation

◆ SDL_BUTTON

#define SDL_BUTTON (   X)    (1 << ((X)-1))

Used as a mask when testing buttons in buttonstate.

  • Button 1: Left mouse button
  • Button 2: Middle mouse button
  • Button 3: Right mouse button

Definition at line 434 of file SDL_mouse.h.

◆ SDL_BUTTON_LEFT

#define SDL_BUTTON_LEFT   1

Definition at line 435 of file SDL_mouse.h.

◆ SDL_BUTTON_LMASK

#define SDL_BUTTON_LMASK   SDL_BUTTON(SDL_BUTTON_LEFT)

Definition at line 440 of file SDL_mouse.h.

◆ SDL_BUTTON_MIDDLE

#define SDL_BUTTON_MIDDLE   2

Definition at line 436 of file SDL_mouse.h.

◆ SDL_BUTTON_MMASK

#define SDL_BUTTON_MMASK   SDL_BUTTON(SDL_BUTTON_MIDDLE)

Definition at line 441 of file SDL_mouse.h.

◆ SDL_BUTTON_RIGHT

#define SDL_BUTTON_RIGHT   3

Definition at line 437 of file SDL_mouse.h.

◆ SDL_BUTTON_RMASK

#define SDL_BUTTON_RMASK   SDL_BUTTON(SDL_BUTTON_RIGHT)

Definition at line 442 of file SDL_mouse.h.

◆ SDL_BUTTON_X1

#define SDL_BUTTON_X1   4

Definition at line 438 of file SDL_mouse.h.

◆ SDL_BUTTON_X1MASK

#define SDL_BUTTON_X1MASK   SDL_BUTTON(SDL_BUTTON_X1)

Definition at line 443 of file SDL_mouse.h.

◆ SDL_BUTTON_X2

#define SDL_BUTTON_X2   5

Definition at line 439 of file SDL_mouse.h.

◆ SDL_BUTTON_X2MASK

#define SDL_BUTTON_X2MASK   SDL_BUTTON(SDL_BUTTON_X2)

Definition at line 444 of file SDL_mouse.h.

Typedef Documentation

◆ SDL_Cursor

typedef struct SDL_Cursor SDL_Cursor

Implementation dependent

Definition at line 1 of file SDL_mouse.h.

Enumeration Type Documentation

◆ SDL_MouseWheelDirection

Scroll direction types for the Scroll event.

Enumerator
SDL_MOUSEWHEEL_NORMAL 

The scroll direction is normal

SDL_MOUSEWHEEL_FLIPPED 

The scroll direction is flipped / natural

Definition at line 66 of file SDL_mouse.h.

67 {
68  SDL_MOUSEWHEEL_NORMAL, /**< The scroll direction is normal */
69  SDL_MOUSEWHEEL_FLIPPED /**< The scroll direction is flipped / natural */
SDL_MouseWheelDirection
Scroll direction types for the Scroll event.
Definition: SDL_mouse.h:67
@ SDL_MOUSEWHEEL_NORMAL
Definition: SDL_mouse.h:68
@ SDL_MOUSEWHEEL_FLIPPED
Definition: SDL_mouse.h:69

◆ SDL_SystemCursor

Cursor types for SDL_CreateSystemCursor().

Enumerator
SDL_SYSTEM_CURSOR_ARROW 

Arrow

SDL_SYSTEM_CURSOR_IBEAM 

I-beam

SDL_SYSTEM_CURSOR_WAIT 

Wait

SDL_SYSTEM_CURSOR_CROSSHAIR 

Crosshair

SDL_SYSTEM_CURSOR_WAITARROW 

Small wait cursor (or Wait if not available)

SDL_SYSTEM_CURSOR_SIZENWSE 

Double arrow pointing northwest and southeast

SDL_SYSTEM_CURSOR_SIZENESW 

Double arrow pointing northeast and southwest

SDL_SYSTEM_CURSOR_SIZEWE 

Double arrow pointing west and east

SDL_SYSTEM_CURSOR_SIZENS 

Double arrow pointing north and south

SDL_SYSTEM_CURSOR_SIZEALL 

Four pointed arrow pointing north, south, east, and west

SDL_SYSTEM_CURSOR_NO 

Slashed circle or crossbones

SDL_SYSTEM_CURSOR_HAND 

Hand

SDL_NUM_SYSTEM_CURSORS 

Definition at line 46 of file SDL_mouse.h.

47 {
48  SDL_SYSTEM_CURSOR_ARROW, /**< Arrow */
49  SDL_SYSTEM_CURSOR_IBEAM, /**< I-beam */
50  SDL_SYSTEM_CURSOR_WAIT, /**< Wait */
51  SDL_SYSTEM_CURSOR_CROSSHAIR, /**< Crosshair */
52  SDL_SYSTEM_CURSOR_WAITARROW, /**< Small wait cursor (or Wait if not available) */
53  SDL_SYSTEM_CURSOR_SIZENWSE, /**< Double arrow pointing northwest and southeast */
54  SDL_SYSTEM_CURSOR_SIZENESW, /**< Double arrow pointing northeast and southwest */
55  SDL_SYSTEM_CURSOR_SIZEWE, /**< Double arrow pointing west and east */
56  SDL_SYSTEM_CURSOR_SIZENS, /**< Double arrow pointing north and south */
57  SDL_SYSTEM_CURSOR_SIZEALL, /**< Four pointed arrow pointing north, south, east, and west */
58  SDL_SYSTEM_CURSOR_NO, /**< Slashed circle or crossbones */
59  SDL_SYSTEM_CURSOR_HAND, /**< Hand */
SDL_SystemCursor
Cursor types for SDL_CreateSystemCursor().
Definition: SDL_mouse.h:47
@ SDL_SYSTEM_CURSOR_SIZENS
Definition: SDL_mouse.h:56
@ SDL_SYSTEM_CURSOR_HAND
Definition: SDL_mouse.h:59
@ SDL_SYSTEM_CURSOR_ARROW
Definition: SDL_mouse.h:48
@ SDL_SYSTEM_CURSOR_SIZENWSE
Definition: SDL_mouse.h:53
@ SDL_SYSTEM_CURSOR_SIZENESW
Definition: SDL_mouse.h:54
@ SDL_SYSTEM_CURSOR_IBEAM
Definition: SDL_mouse.h:49
@ SDL_SYSTEM_CURSOR_NO
Definition: SDL_mouse.h:58
@ SDL_SYSTEM_CURSOR_WAITARROW
Definition: SDL_mouse.h:52
@ SDL_SYSTEM_CURSOR_SIZEALL
Definition: SDL_mouse.h:57
@ SDL_SYSTEM_CURSOR_WAIT
Definition: SDL_mouse.h:50
@ SDL_NUM_SYSTEM_CURSORS
Definition: SDL_mouse.h:60
@ SDL_SYSTEM_CURSOR_SIZEWE
Definition: SDL_mouse.h:55
@ SDL_SYSTEM_CURSOR_CROSSHAIR
Definition: SDL_mouse.h:51

Function Documentation

◆ SDL_CaptureMouse()

int SDL_CaptureMouse ( SDL_bool  enabled)

Capture the mouse and to track input outside an SDL window.

Capturing enables your app to obtain mouse events globally, instead of just within your window. Not all video targets support this function. When capturing is enabled, the current window will get all mouse events, but unlike relative mode, no change is made to the cursor and it is not restrained to your window.

This function may also deny mouse input to other windows–both those in your application and others on the system–so you should use this function sparingly, and in small bursts. For example, you might want to track the mouse while the user is dragging something, until the user releases a mouse button. It is not recommended that you capture the mouse for long periods of time, such as the entire time your app is running. For that, you should probably use SDL_SetRelativeMouseMode() or SDL_SetWindowGrab(), depending on your goals.

While captured, mouse events still report coordinates relative to the current (foreground) window, but those coordinates may be outside the bounds of the window (including negative values). Capturing is only allowed for the foreground window. If the window loses focus while capturing, the capture will be disabled automatically.

While capturing is enabled, the current window will have the SDL_WINDOW_MOUSE_CAPTURE flag set.

Parameters
enabledSDL_TRUE to enable capturing, SDL_FALSE to disable.
Returns
0 on success or -1 if not supported; call SDL_GetError() for more information.
Since
This function is available since SDL 2.0.4.
See also
SDL_GetGlobalMouseState

◆ SDL_CreateColorCursor()

SDL_Cursor* SDL_CreateColorCursor ( SDL_Surface surface,
int  hot_x,
int  hot_y 
)

Create a color cursor.

Parameters
surfacean SDL_Surface structure representing the cursor image
hot_xthe x position of the cursor hot spot
hot_ythe y position of the cursor hot spot
Returns
the new cursor on success or NULL on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 2.0.0.
See also
SDL_CreateCursor
SDL_FreeCursor

◆ SDL_CreateCursor()

SDL_Cursor* SDL_CreateCursor ( const Uint8 data,
const Uint8 mask,
int  w,
int  h,
int  hot_x,
int  hot_y 
)

Create a cursor using the specified bitmap data and mask (in MSB format).

mask has to be in MSB (Most Significant Bit) format.

The cursor width (w) must be a multiple of 8 bits.

The cursor is created in black and white according to the following:

  • data=0, mask=1: white
  • data=1, mask=1: black
  • data=0, mask=0: transparent
  • data=1, mask=0: inverted color if possible, black if not.

Cursors created with this function must be freed with SDL_FreeCursor().

If you want to have a color cursor, or create your cursor from an SDL_Surface, you should use SDL_CreateColorCursor(). Alternately, you can hide the cursor and draw your own as part of your game's rendering, but it will be bound to the framerate.

Also, since SDL 2.0.0, SDL_CreateSystemCursor() is available, which provides twelve readily available system cursors to pick from.

Parameters
datathe color value for each pixel of the cursor
maskthe mask value for each pixel of the cursor
wthe width of the cursor
hthe height of the cursor
hot_xthe X-axis location of the upper left corner of the cursor relative to the actual mouse position
hot_ythe Y-axis location of the upper left corner of the cursor relative to the actual mouse position
Returns
a new cursor with the specified parameters on success or NULL on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 2.0.0.
See also
SDL_FreeCursor
SDL_SetCursor
SDL_ShowCursor

◆ SDL_CreateSystemCursor()

SDL_Cursor* SDL_CreateSystemCursor ( SDL_SystemCursor  id)

Create a system cursor.

Parameters
idan SDL_SystemCursor enum value
Returns
a cursor on success or NULL on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 2.0.0.
See also
SDL_FreeCursor

◆ SDL_FreeCursor()

void SDL_FreeCursor ( SDL_Cursor cursor)

Free a previously-created cursor.

Use this function to free cursor resources created with SDL_CreateCursor(), SDL_CreateColorCursor() or SDL_CreateSystemCursor().

Parameters
cursorthe cursor to free
Since
This function is available since SDL 2.0.0.
See also
SDL_CreateColorCursor
SDL_CreateCursor
SDL_CreateSystemCursor

◆ SDL_GetCursor()

SDL_Cursor* SDL_GetCursor ( void  )

Get the active cursor.

This function returns a pointer to the current cursor which is owned by the library. It is not necessary to free the cursor with SDL_FreeCursor().

Returns
the active cursor or NULL if there is no mouse.
Since
This function is available since SDL 2.0.0.
See also
SDL_SetCursor

◆ SDL_GetDefaultCursor()

SDL_Cursor* SDL_GetDefaultCursor ( void  )

Get the default cursor.

Returns
the default cursor on success or NULL on failure.
Since
This function is available since SDL 2.0.0.
See also
SDL_CreateSystemCursor

◆ SDL_GetGlobalMouseState()

Uint32 SDL_GetGlobalMouseState ( int *  x,
int *  y 
)

Get the current state of the mouse in relation to the desktop.

This works similarly to SDL_GetMouseState(), but the coordinates will be reported relative to the top-left of the desktop. This can be useful if you need to track the mouse outside of a specific window and SDL_CaptureMouse() doesn't fit your needs. For example, it could be useful if you need to track the mouse while dragging a window, where coordinates relative to a window might not be in sync at all times.

Note: SDL_GetMouseState() returns the mouse position as SDL understands it from the last pump of the event queue. This function, however, queries the OS for the current mouse position, and as such, might be a slightly less efficient function. Unless you know what you're doing and have a good reason to use this function, you probably want SDL_GetMouseState() instead.

Parameters
xfilled in with the current X coord relative to the desktop; can be NULL
yfilled in with the current Y coord relative to the desktop; can be NULL
Returns
the current button state as a bitmask which can be tested using the SDL_BUTTON(X) macros.
Since
This function is available since SDL 2.0.4.
See also
SDL_CaptureMouse

◆ SDL_GetMouseFocus()

SDL_Window* SDL_GetMouseFocus ( void  )

Get the window which currently has mouse focus.

Returns
the window with mouse focus.
Since
This function is available since SDL 2.0.0.

◆ SDL_GetMouseState()

Uint32 SDL_GetMouseState ( int *  x,
int *  y 
)

Retrieve the current state of the mouse.

The current button state is returned as a button bitmask, which can be tested using the SDL_BUTTON(X) macros (where X is generally 1 for the left, 2 for middle, 3 for the right button), and x and y are set to the mouse cursor position relative to the focus window. You can pass NULL for either x or y.

Parameters
xthe x coordinate of the mouse cursor position relative to the focus window
ythe y coordinate of the mouse cursor position relative to the focus window
Returns
a 32-bit button bitmask of the current button state.
Since
This function is available since SDL 2.0.0.
See also
SDL_GetGlobalMouseState
SDL_GetRelativeMouseState
SDL_PumpEvents

◆ SDL_GetRelativeMouseMode()

SDL_bool SDL_GetRelativeMouseMode ( void  )

Query whether relative mouse mode is enabled.

Returns
SDL_TRUE if relative mode is enabled or SDL_FALSE otherwise.
Since
This function is available since SDL 2.0.0.
See also
SDL_SetRelativeMouseMode

◆ SDL_GetRelativeMouseState()

Uint32 SDL_GetRelativeMouseState ( int *  x,
int *  y 
)

Retrieve the relative state of the mouse.

The current button state is returned as a button bitmask, which can be tested using the SDL_BUTTON(X) macros (where X is generally 1 for the left, 2 for middle, 3 for the right button), and x and y are set to the mouse deltas since the last call to SDL_GetRelativeMouseState() or since event initialization. You can pass NULL for either x or y.

Parameters
xa pointer filled with the last recorded x coordinate of the mouse
ya pointer filled with the last recorded y coordinate of the mouse
Returns
a 32-bit button bitmask of the relative button state.
Since
This function is available since SDL 2.0.0.
See also
SDL_GetMouseState

◆ SDL_SetCursor()

void SDL_SetCursor ( SDL_Cursor cursor)

Set the active cursor.

This function sets the currently active cursor to the specified one. If the cursor is currently visible, the change will be immediately represented on the display. SDL_SetCursor(NULL) can be used to force cursor redraw, if this is desired for any reason.

Parameters
cursora cursor to make active
Since
This function is available since SDL 2.0.0.
See also
SDL_CreateCursor
SDL_GetCursor
SDL_ShowCursor

◆ SDL_SetRelativeMouseMode()

int SDL_SetRelativeMouseMode ( SDL_bool  enabled)

Set relative mouse mode.

While the mouse is in relative mode, the cursor is hidden, and the driver will try to report continuous motion in the current window. Only relative motion events will be delivered, the mouse position will not change.

Note that this function will not be able to provide continuous relative motion when used over Microsoft Remote Desktop, instead motion is limited to the bounds of the screen.

This function will flush any pending mouse motion.

Parameters
enabledSDL_TRUE to enable relative mode, SDL_FALSE to disable.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.

If relative mode is not supported, this returns -1.

Since
This function is available since SDL 2.0.0.
See also
SDL_GetRelativeMouseMode

◆ SDL_ShowCursor()

int SDL_ShowCursor ( int  toggle)

Toggle whether or not the cursor is shown.

The cursor starts off displayed but can be turned off. Passing SDL_ENABLE displays the cursor and passing SDL_DISABLE hides it.

The current state of the mouse cursor can be queried by passing SDL_QUERY; either SDL_DISABLE or SDL_ENABLE will be returned.

Parameters
toggleSDL_ENABLE to show the cursor, SDL_DISABLE to hide it, SDL_QUERY to query the current state without changing it.
Returns
SDL_ENABLE if the cursor is shown, or SDL_DISABLE if the cursor is hidden, or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 2.0.0.
See also
SDL_CreateCursor
SDL_SetCursor

◆ SDL_WarpMouseGlobal()

int SDL_WarpMouseGlobal ( int  x,
int  y 
)

Move the mouse to the given position in global screen space.

This function generates a mouse motion event.

A failure of this function usually means that it is unsupported by a platform.

Note that this function will appear to succeed, but not actually move the mouse when used over Microsoft Remote Desktop.

Parameters
xthe x coordinate
ythe y coordinate
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 2.0.4.
See also
SDL_WarpMouseInWindow

◆ SDL_WarpMouseInWindow()

void SDL_WarpMouseInWindow ( SDL_Window window,
int  x,
int  y 
)

Move the mouse cursor to the given position within the window.

This function generates a mouse motion event.

Note that this function will appear to succeed, but not actually move the mouse when used over Microsoft Remote Desktop.

Parameters
windowthe window to move the mouse into, or NULL for the current mouse focus
xthe x coordinate within the window
ythe y coordinate within the window
Since
This function is available since SDL 2.0.0.
See also
SDL_WarpMouseGlobal