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C/C++ Source or Header  |  2010-11-13  |  4.6 KB  |  146 lines
  1. /*****************************************************************************
  2.  * vlc_mouse.h: mouse related structures and functions
  3.  *****************************************************************************
  4.  * Copyright (C) 2009 Laurent Aimar
  5.  * $Id: dff2129424d7f9c8f5c342f175572058d8b002f9 $
  6.  *
  7.  * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
  8.  *
  9.  * This program is free software; you can redistribute it and/or modify
  10.  * it under the terms of the GNU General Public License as published by
  11.  * the Free Software Foundation; either version 2 of the License, or
  12.  * (at your option) any later version.
  13.  *
  14.  * This program is distributed in the hope that it will be useful,
  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17.  * GNU General Public License for more details.
  18.  *
  19.  * You should have received a copy of the GNU General Public License
  20.  * along with this program; if not, write to the Free Software
  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22.  *****************************************************************************/
  23.  
  24. #ifndef _VLC_MOUSE_H
  25. #define _VLC_MOUSE_H 1
  26.  
  27. /**
  28.  * Mouse button
  29.  */
  30. enum
  31. {
  32.     MOUSE_BUTTON_LEFT,
  33.     MOUSE_BUTTON_CENTER,
  34.     MOUSE_BUTTON_RIGHT,
  35.     MOUSE_BUTTON_WHEEL_UP,
  36.     MOUSE_BUTTON_WHEEL_DOWN,
  37. };
  38.  
  39. /**
  40.  * Mouse state
  41.  */
  42. typedef struct
  43. {
  44.     /* Coordinate */
  45.     int i_x;
  46.     int i_y;
  47.     /* Mask of pressed button */
  48.     int i_pressed;
  49.     /* Is double clicked */
  50.     bool b_double_click;
  51. } vlc_mouse_t;
  52.  
  53. static inline void vlc_mouse_Init( vlc_mouse_t *p_mouse )
  54. {
  55.     p_mouse->i_x = 0;
  56.     p_mouse->i_y = 0;
  57.     p_mouse->i_pressed = 0;
  58.     p_mouse->b_double_click = false;
  59. }
  60.  
  61. /* */
  62. static inline void vlc_mouse_SetPressed( vlc_mouse_t *p_mouse,
  63.                                          int i_button )
  64. {
  65.     p_mouse->i_pressed |= 1 << i_button;
  66. }
  67. static inline void vlc_mouse_SetReleased( vlc_mouse_t *p_mouse,
  68.                                           int i_button )
  69. {
  70.     p_mouse->i_pressed &= ~(1 << i_button);
  71. }
  72. static inline void vlc_mouse_SetPosition( vlc_mouse_t *p_mouse,
  73.                                           int i_x, int i_y )
  74. {
  75.     p_mouse->i_x = i_x;
  76.     p_mouse->i_y = i_y;
  77. }
  78.  
  79. /* */
  80. static inline bool vlc_mouse_IsPressed( const vlc_mouse_t *p_mouse,
  81.                                         int i_button )
  82. {
  83.     return ( p_mouse->i_pressed & (1 << i_button) ) != 0;
  84. }
  85. static inline bool vlc_mouse_IsLeftPressed( const vlc_mouse_t *p_mouse )
  86. {
  87.     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_LEFT );
  88. }
  89. static inline bool vlc_mouse_IsCenterPressed( const vlc_mouse_t *p_mouse )
  90. {
  91.     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_CENTER );
  92. }
  93. static inline bool vlc_mouse_IsRightPressed( const vlc_mouse_t *p_mouse )
  94. {
  95.     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_RIGHT );
  96. }
  97. static inline bool vlc_mouse_IsWheelUpPressed( const vlc_mouse_t *p_mouse )
  98. {
  99.     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_WHEEL_UP );
  100. }
  101. static inline bool vlc_mouse_IsWheelDownPressed( const vlc_mouse_t *p_mouse )
  102. {
  103.     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_WHEEL_DOWN );
  104. }
  105. static inline void vlc_mouse_GetMotion( int *pi_x, int *pi_y,
  106.                                         const vlc_mouse_t *p_old,
  107.                                         const vlc_mouse_t *p_new )
  108. {
  109.     *pi_x = p_new->i_x - p_old->i_x;
  110.     *pi_y = p_new->i_y - p_old->i_y;
  111. }
  112.  
  113. /* */
  114. static inline bool vlc_mouse_HasChanged( const vlc_mouse_t *p_old,
  115.                                          const vlc_mouse_t *p_new )
  116. {
  117.     return p_old->i_x != p_new->i_x || p_old->i_x != p_new->i_x ||
  118.            p_old->i_pressed != p_new->i_pressed;
  119. }
  120. static inline bool vlc_mouse_HasMoved( const vlc_mouse_t *p_old,
  121.                                        const vlc_mouse_t *p_new )
  122. {
  123.     return p_old->i_x != p_new->i_x || p_old->i_y != p_new->i_y;
  124. }
  125. static inline bool vlc_mouse_HasButton( const vlc_mouse_t *p_old,
  126.                                         const vlc_mouse_t *p_new )
  127. {
  128.     return p_old->i_pressed != p_new->i_pressed;
  129. }
  130. static inline bool vlc_mouse_HasPressed( const vlc_mouse_t *p_old,
  131.                                          const vlc_mouse_t *p_new,
  132.                                          int i_button )
  133. {
  134.     const int i_mask = 1 << i_button;
  135.     return (p_old->i_pressed & i_mask) == 0 && (p_new->i_pressed & i_mask);
  136. }
  137. static inline bool vlc_mouse_HasReleased( const vlc_mouse_t *p_old,
  138.                                           const vlc_mouse_t *p_new,
  139.                                           int i_button )
  140. {
  141.     const int i_mask = 1 << i_button;
  142.     return (p_old->i_pressed & i_mask) && (p_new->i_pressed & i_mask) == 0;
  143. }
  144. #endif /* _VLC_MOUSE_H */
  145.  
  146.