annotate include/SDL_mouse.h @ 1641:5cf11b00b900

Fixed bug #197 On servers with the composite extension enabled, visuals with 32-bit depth have an alpha mask. This is pretty neat, but SDL needs a bit more work to handle these properly, so for now, we'll just use 24 bit depth visuals.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Apr 2006 04:54:08 +0000
parents c71e05b4dc2e
children 782fd950bd46 c121d94672cb 1146681dbb74
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* Include file for SDL mouse event handling */
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24
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25 #ifndef _SDL_mouse_h
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26 #define _SDL_mouse_h
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27
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28 #include "SDL_stdinc.h"
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29 #include "SDL_error.h"
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30 #include "SDL_video.h"
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31
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32 #include "begin_code.h"
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33 /* Set up for C function definitions, even when using C++ */
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34 #ifdef __cplusplus
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35 extern "C" {
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36 #endif
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37
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38 typedef struct WMcursor WMcursor; /* Implementation dependent */
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39 typedef struct SDL_Cursor {
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40 SDL_Rect area; /* The area of the mouse cursor */
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41 Sint16 hot_x, hot_y; /* The "tip" of the cursor */
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42 Uint8 *data; /* B/W cursor data */
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43 Uint8 *mask; /* B/W cursor mask */
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44 Uint8 *save[2]; /* Place to save cursor area */
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45 WMcursor *wm_cursor; /* Window-manager cursor */
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46 } SDL_Cursor;
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47
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48 /* Function prototypes */
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49 /*
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50 * Retrieve the current state of the mouse.
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51 * The current button state is returned as a button bitmask, which can
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52 * be tested using the SDL_BUTTON(X) macros, and x and y are set to the
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53 * current mouse cursor position. You can pass NULL for either x or y.
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54 */
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55 extern DECLSPEC Uint8 SDLCALL SDL_GetMouseState(int *x, int *y);
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56
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57 /*
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58 * Retrieve the current state of the mouse.
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59 * The current button state is returned as a button bitmask, which can
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60 * be tested using the SDL_BUTTON(X) macros, and x and y are set to the
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61 * mouse deltas since the last call to SDL_GetRelativeMouseState().
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62 */
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63 extern DECLSPEC Uint8 SDLCALL SDL_GetRelativeMouseState(int *x, int *y);
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64
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65 /*
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66 * Set the position of the mouse cursor (generates a mouse motion event)
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67 */
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68 extern DECLSPEC void SDLCALL SDL_WarpMouse(Uint16 x, Uint16 y);
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69
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70 /*
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71 * Create a cursor using the specified data and mask (in MSB format).
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72 * The cursor width must be a multiple of 8 bits.
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73 *
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74 * The cursor is created in black and white according to the following:
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75 * data mask resulting pixel on screen
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76 * 0 1 White
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77 * 1 1 Black
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78 * 0 0 Transparent
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79 * 1 0 Inverted color if possible, black if not.
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80 *
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81 * Cursors created with this function must be freed with SDL_FreeCursor().
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82 */
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83 extern DECLSPEC SDL_Cursor * SDLCALL SDL_CreateCursor
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84 (Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y);
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85
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86 /*
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87 * Set the currently active cursor to the specified one.
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88 * If the cursor is currently visible, the change will be immediately
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89 * represented on the display.
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90 */
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91 extern DECLSPEC void SDLCALL SDL_SetCursor(SDL_Cursor *cursor);
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92
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93 /*
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94 * Returns the currently active cursor.
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95 */
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96 extern DECLSPEC SDL_Cursor * SDLCALL SDL_GetCursor(void);
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97
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98 /*
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99 * Deallocates a cursor created with SDL_CreateCursor().
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100 */
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101 extern DECLSPEC void SDLCALL SDL_FreeCursor(SDL_Cursor *cursor);
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102
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103 /*
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104 * Toggle whether or not the cursor is shown on the screen.
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105 * The cursor start off displayed, but can be turned off.
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106 * SDL_ShowCursor() returns 1 if the cursor was being displayed
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107 * before the call, or 0 if it was not. You can query the current
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108 * state by passing a 'toggle' value of -1.
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109 */
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110 extern DECLSPEC int SDLCALL SDL_ShowCursor(int toggle);
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111
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112 /* Used as a mask when testing buttons in buttonstate
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113 Button 1: Left mouse button
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114 Button 2: Middle mouse button
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115 Button 3: Right mouse button
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116 Button 4: Mouse wheel up (may also be a real button)
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117 Button 5: Mouse wheel down (may also be a real button)
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118 */
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119 #define SDL_BUTTON(X) (1 << ((X)-1))
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120 #define SDL_BUTTON_LEFT 1
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121 #define SDL_BUTTON_MIDDLE 2
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122 #define SDL_BUTTON_RIGHT 3
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123 #define SDL_BUTTON_WHEELUP 4
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124 #define SDL_BUTTON_WHEELDOWN 5
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125 #define SDL_BUTTON_LMASK SDL_BUTTON(SDL_BUTTON_LEFT)
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126 #define SDL_BUTTON_MMASK SDL_BUTTON(SDL_BUTTON_MIDDLE)
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127 #define SDL_BUTTON_RMASK SDL_BUTTON(SDL_BUTTON_RIGHT)
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128
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129
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130 /* Ends C function definitions when using C++ */
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131 #ifdef __cplusplus
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132 }
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133 #endif
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134 #include "close_code.h"
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135
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136 #endif /* _SDL_mouse_h */