VLC  2.1.0-git
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vlc_mouse.h
Go to the documentation of this file.
1 /*****************************************************************************
2  * vlc_mouse.h: mouse related structures and functions
3  *****************************************************************************
4  * Copyright (C) 2009 Laurent Aimar
5  * $Id: b48853570a09ad1d77cc95cda0c5b04b5028ee80 $
6  *
7  * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public License
20  * along with this program; if not, write to the Free Software Foundation,
21  * 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_WHEEL_LEFT,
38  MOUSE_BUTTON_WHEEL_RIGHT,
39  MOUSE_BUTTON_MAX
40 };
41 
42 /**
43  * Mouse state
44  */
45 typedef struct
46 {
47  /* Coordinate */
48  int i_x;
49  int i_y;
50  /* Mask of pressed button */
51  int i_pressed;
52  /* Is double clicked */
53  bool b_double_click;
54 } vlc_mouse_t;
55 
56 static inline void vlc_mouse_Init( vlc_mouse_t *p_mouse )
57 {
58  p_mouse->i_x = 0;
59  p_mouse->i_y = 0;
60  p_mouse->i_pressed = 0;
61  p_mouse->b_double_click = false;
62 }
63 
64 /* */
65 static inline void vlc_mouse_SetPressed( vlc_mouse_t *p_mouse,
66  int i_button )
67 {
68  p_mouse->i_pressed |= 1 << i_button;
69 }
70 static inline void vlc_mouse_SetReleased( vlc_mouse_t *p_mouse,
71  int i_button )
72 {
73  p_mouse->i_pressed &= ~(1 << i_button);
74 }
75 static inline void vlc_mouse_SetPosition( vlc_mouse_t *p_mouse,
76  int i_x, int i_y )
77 {
78  p_mouse->i_x = i_x;
79  p_mouse->i_y = i_y;
80 }
81 
82 /* */
83 static inline bool vlc_mouse_IsPressed( const vlc_mouse_t *p_mouse,
84  int i_button )
85 {
86  return ( p_mouse->i_pressed & (1 << i_button) ) != 0;
87 }
88 static inline bool vlc_mouse_IsLeftPressed( const vlc_mouse_t *p_mouse )
89 {
90  return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_LEFT );
91 }
92 static inline bool vlc_mouse_IsCenterPressed( const vlc_mouse_t *p_mouse )
93 {
94  return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_CENTER );
95 }
96 static inline bool vlc_mouse_IsRightPressed( const vlc_mouse_t *p_mouse )
97 {
98  return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_RIGHT );
99 }
100 static inline bool vlc_mouse_IsWheelUpPressed( const vlc_mouse_t *p_mouse )
101 {
102  return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_WHEEL_UP );
103 }
104 static inline bool vlc_mouse_IsWheelDownPressed( const vlc_mouse_t *p_mouse )
105 {
106  return vlc_mouse_IsPressed( p_mouse, MOUSE_BUTTON_WHEEL_DOWN );
107 }
108 static inline void vlc_mouse_GetMotion( int *pi_x, int *pi_y,
109  const vlc_mouse_t *p_old,
110  const vlc_mouse_t *p_new )
111 {
112  *pi_x = p_new->i_x - p_old->i_x;
113  *pi_y = p_new->i_y - p_old->i_y;
114 }
115 
116 /* */
117 static inline bool vlc_mouse_HasChanged( const vlc_mouse_t *p_old,
118  const vlc_mouse_t *p_new )
119 {
120  return p_old->i_x != p_new->i_x || p_old->i_y != p_new->i_y ||
121  p_old->i_pressed != p_new->i_pressed;
122 }
123 static inline bool vlc_mouse_HasMoved( const vlc_mouse_t *p_old,
124  const vlc_mouse_t *p_new )
125 {
126  return p_old->i_x != p_new->i_x || p_old->i_y != p_new->i_y;
127 }
128 static inline bool vlc_mouse_HasButton( const vlc_mouse_t *p_old,
129  const vlc_mouse_t *p_new )
130 {
131  return p_old->i_pressed != p_new->i_pressed;
132 }
133 static inline bool vlc_mouse_HasPressed( const vlc_mouse_t *p_old,
134  const vlc_mouse_t *p_new,
135  int i_button )
136 {
137  const int i_mask = 1 << i_button;
138  return (p_old->i_pressed & i_mask) == 0 && (p_new->i_pressed & i_mask);
139 }
140 static inline bool vlc_mouse_HasReleased( const vlc_mouse_t *p_old,
141  const vlc_mouse_t *p_new,
142  int i_button )
143 {
144  const int i_mask = 1 << i_button;
145  return (p_old->i_pressed & i_mask) && (p_new->i_pressed & i_mask) == 0;
146 }
147 #endif /* _VLC_MOUSE_H */
148 
Generated by   doxygen 1.8.1.2