git.sesse.net Git - vlc/blob - include/vlc_mouse.h

   1 /*****************************************************************************
   2  * vlc_mouse.h: mouse related structures and functions
   3  *****************************************************************************
   4  * Copyright (C) 2009 Laurent Aimar
   5  * $Id$
   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 buttons
  29  */
  30 enum
  31 {
  32     MOUSE_BUTTON_LEFT=0,
  33     MOUSE_BUTTON_CENTER,
  34     MOUSE_BUTTON_RIGHT,
  35     MOUSE_BUTTON_WHEEL_UP,
  36     MOUSE_BUTTON_WHEEL_DOWN,
  37     MOUSE_BUTTON_MAX
  38 };
  39
  40 /**
  41  * Mouse state
  42  */
  43 typedef struct
  44 {
  45     /* Coordinate */
  46     int i_x;
  47     int i_y;
  48     /* Mask of pressed button */
  49     int i_pressed;
  50     /* Is double clicked */
  51     bool b_double_click;
  52 } vlc_mouse_t;
  53
  54 static inline void vlc_mouse_Init( vlc_mouse_t *p_mouse )
  55 {
  56     p_mouse->i_x = 0;
  57     p_mouse->i_y = 0;
  58     p_mouse->i_pressed = 0;
  59     p_mouse->b_double_click = false;
  60 }
  61
  62 /* */
  63 static inline void vlc_mouse_SetPressed( vlc_mouse_t *p_mouse,
  64                                          int i_button )
  65 {
  66     p_mouse->i_pressed |= 1 << i_button;
  67 }
  68 static inline void vlc_mouse_SetReleased( vlc_mouse_t *p_mouse,
  69                                           int i_button )
  70 {
  71     p_mouse->i_pressed &= ~(1 << i_button);
  72 }
  73 static inline void vlc_mouse_SetPosition( vlc_mouse_t *p_mouse,
  74                                           int i_x, int i_y )
  75 {
  76     p_mouse->i_x = i_x;
  77     p_mouse->i_y = i_y;
  78 }
  79
  80 /* */
  81 static inline bool vlc_mouse_IsPressed( const vlc_mouse_t *p_mouse,
  82                                         int i_button )
  83 {
  84     return ( p_mouse->i_pressed & (1 << i_button) ) != 0;
  85 }
  86 static inline bool vlc_mouse_IsLeftPressed( const vlc_mouse_t *p_mouse )
  87 {
  88     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_LEFT );
  89 }
  90 static inline bool vlc_mouse_IsCenterPressed( const vlc_mouse_t *p_mouse )
  91 {
  92     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_CENTER );
  93 }
  94 static inline bool vlc_mouse_IsRightPressed( const vlc_mouse_t *p_mouse )
  95 {
  96     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_RIGHT );
  97 }
  98 static inline bool vlc_mouse_IsWheelUpPressed( const vlc_mouse_t *p_mouse )
  99 {
 100     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_WHEEL_UP );
 101 }
 102 static inline bool vlc_mouse_IsWheelDownPressed( const vlc_mouse_t *p_mouse )
 103 {
 104     return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_WHEEL_DOWN );
 105 }
 106 static inline void vlc_mouse_GetMotion( int *pi_x, int *pi_y,
 107                                         const vlc_mouse_t *p_old,
 108                                         const vlc_mouse_t *p_new )
 109 {
 110     *pi_x = p_new->i_x - p_old->i_x;
 111     *pi_y = p_new->i_y - p_old->i_y;
 112 }
 113
 114 /* */
 115 static inline bool vlc_mouse_HasChanged( const vlc_mouse_t *p_old,
 116                                          const vlc_mouse_t *p_new )
 117 {
 118     return p_old->i_x != p_new->i_x || p_old->i_x != p_new->i_x ||
 119            p_old->i_pressed != p_new->i_pressed;
 120 }
 121 static inline bool vlc_mouse_HasMoved( const vlc_mouse_t *p_old,
 122                                        const vlc_mouse_t *p_new )
 123 {
 124     return p_old->i_x != p_new->i_x || p_old->i_y != p_new->i_y;
 125 }
 126 static inline bool vlc_mouse_HasButton( const vlc_mouse_t *p_old,
 127                                         const vlc_mouse_t *p_new )
 128 {
 129     return p_old->i_pressed != p_new->i_pressed;
 130 }
 131 static inline bool vlc_mouse_HasPressed( const vlc_mouse_t *p_old,
 132                                          const vlc_mouse_t *p_new,
 133                                          int i_button )
 134 {
 135     const int i_mask = 1 << i_button;
 136     return (p_old->i_pressed & i_mask) == 0 && (p_new->i_pressed & i_mask);
 137 }
 138 static inline bool vlc_mouse_HasReleased( const vlc_mouse_t *p_old,
 139                                           const vlc_mouse_t *p_new,
 140                                           int i_button )
 141 {
 142     const int i_mask = 1 << i_button;
 143     return (p_old->i_pressed & i_mask) && (p_new->i_pressed & i_mask) == 0;
 144 }
 145 #endif /* _VLC_MOUSE_H */
 146