1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 23 /** @file SDL_mouse.h 24 * Include file for SDL mouse event handling 25 */ 26 27 #ifndef _SDL_mouse_h 28 #define _SDL_mouse_h 29 30 #include "SDL_stdinc.h" 31 #include "SDL_error.h" 32 #include "SDL_video.h" 33 34 #include "begin_code.h" 35 /* Set up for C function definitions, even when using C++ */ 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 typedef struct WMcursor WMcursor; /**< Implementation dependent */ 41 typedef struct SDL_Cursor { 42 SDL_Rect area; /**< The area of the mouse cursor */ 43 Sint16 hot_x, hot_y; /**< The "tip" of the cursor */ 44 Uint8 *data; /**< B/W cursor data */ 45 Uint8 *mask; /**< B/W cursor mask */ 46 Uint8 *save[2]; /**< Place to save cursor area */ 47 WMcursor *wm_cursor; /**< Window-manager cursor */ 48 } SDL_Cursor; 49 50 /* Function prototypes */ 51 /** 52 * Retrieve the current state of the mouse. 53 * The current button state is returned as a button bitmask, which can 54 * be tested using the SDL_BUTTON(X) macros, and x and y are set to the 55 * current mouse cursor position. You can pass NULL for either x or y. 56 */ 57 extern DECLSPEC Uint8 SDLCALL SDL_GetMouseState(int *x, int *y); 58 59 /** 60 * Retrieve the current state of the mouse. 61 * The current button state is returned as a button bitmask, which can 62 * be tested using the SDL_BUTTON(X) macros, and x and y are set to the 63 * mouse deltas since the last call to SDL_GetRelativeMouseState(). 64 */ 65 extern DECLSPEC Uint8 SDLCALL SDL_GetRelativeMouseState(int *x, int *y); 66 67 /** 68 * Set the position of the mouse cursor (generates a mouse motion event) 69 */ 70 extern DECLSPEC void SDLCALL SDL_WarpMouse(Uint16 x, Uint16 y); 71 72 /** 73 * Create a cursor using the specified data and mask (in MSB format). 74 * The cursor width must be a multiple of 8 bits. 75 * 76 * The cursor is created in black and white according to the following: 77 * data mask resulting pixel on screen 78 * 0 1 White 79 * 1 1 Black 80 * 0 0 Transparent 81 * 1 0 Inverted color if possible, black if not. 82 * 83 * Cursors created with this function must be freed with SDL_FreeCursor(). 84 */ 85 extern DECLSPEC SDL_Cursor * SDLCALL SDL_CreateCursor 86 (Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y); 87 88 /** 89 * Set the currently active cursor to the specified one. 90 * If the cursor is currently visible, the change will be immediately 91 * represented on the display. 92 */ 93 extern DECLSPEC void SDLCALL SDL_SetCursor(SDL_Cursor *cursor); 94 95 /** 96 * Returns the currently active cursor. 97 */ 98 extern DECLSPEC SDL_Cursor * SDLCALL SDL_GetCursor(void); 99 100 /** 101 * Deallocates a cursor created with SDL_CreateCursor(). 102 */ 103 extern DECLSPEC void SDLCALL SDL_FreeCursor(SDL_Cursor *cursor); 104 105 /** 106 * Toggle whether or not the cursor is shown on the screen. 107 * The cursor start off displayed, but can be turned off. 108 * SDL_ShowCursor() returns 1 if the cursor was being displayed 109 * before the call, or 0 if it was not. You can query the current 110 * state by passing a 'toggle' value of -1. 111 */ 112 extern DECLSPEC int SDLCALL SDL_ShowCursor(int toggle); 113 114 /*@{*/ 115 /** Used as a mask when testing buttons in buttonstate 116 * Button 1: Left mouse button 117 * Button 2: Middle mouse button 118 * Button 3: Right mouse button 119 * Button 4: Mouse wheel up (may also be a real button) 120 * Button 5: Mouse wheel down (may also be a real button) 121 */ 122 #define SDL_BUTTON(X) (1 << ((X)-1)) 123 #define SDL_BUTTON_LEFT 1 124 #define SDL_BUTTON_MIDDLE 2 125 #define SDL_BUTTON_RIGHT 3 126 #define SDL_BUTTON_WHEELUP 4 127 #define SDL_BUTTON_WHEELDOWN 5 128 #define SDL_BUTTON_X1 6 129 #define SDL_BUTTON_X2 7 130 #define SDL_BUTTON_LMASK SDL_BUTTON(SDL_BUTTON_LEFT) 131 #define SDL_BUTTON_MMASK SDL_BUTTON(SDL_BUTTON_MIDDLE) 132 #define SDL_BUTTON_RMASK SDL_BUTTON(SDL_BUTTON_RIGHT) 133 #define SDL_BUTTON_X1MASK SDL_BUTTON(SDL_BUTTON_X1) 134 #define SDL_BUTTON_X2MASK SDL_BUTTON(SDL_BUTTON_X2) 135 /*@}*/ 136 137 /* Ends C function definitions when using C++ */ 138 #ifdef __cplusplus 139 } 140 #endif 141 #include "close_code.h" 142 143 #endif /* _SDL_mouse_h */ 144
