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29 * Copyright 2004, 2006 Develer S.r.l. (http://www.develer.com/)
33 * \brief Generic editor for (volume/gain/contrast/...) setting.
37 * \author Stefano Fedrigo <aleph@develer.com>
39 #ifndef GUI_LEVELEDIT_H
40 #define GUI_LEVELEDIT_H
42 //#include <gui/levelbar.h>
44 /* Type for level_init */
45 #define LEVELEDIT_NOBAR 0 /**< Edit number only, without bar nor units */
46 #define LEVELEDIT_SINGLE 1 /**< Single channel editing */
47 #define LEVELEDIT_DOUBLE 2 /**< Double channel editing */
55 /** Type for callback used to set meter levels */
56 typedef void level_set_callback(void);
58 /** Type for callback used to customize display of units */
59 typedef void display_callback(struct LevelEdit *);
62 * State of a level meter
64 typedef struct LevelEdit {
65 int type; /*<! Type of level edititing mode (see prev defines) */
66 const char *title; /*<! Title on top of screen */
67 const char *unit; /*<! Unit of quantity changed by this LevelEdit */
68 int min; /*<! Minimum level */
69 int max; /*<! Maximum level */
70 int step; /*<! Value of a single increment/decrement */
72 level_set_callback *set_hook; /*<! Callback called when a value is changed */
73 display_callback *display_hook; /*<! Callback for complex unit display */
74 int *ch1_val; /*<! (left) Value edited by this leveledit */
75 int *ch2_val; /*<! Right channel edited */
77 struct Bitmap *bitmap; /*<! Bitmap where the whole thing is rendered */
81 void level_init(struct LevelEdit *lev,
83 struct Bitmap *bmp, const char *title, const char *unit,
84 int min, int max, int step,
85 int *ch1_val, int *ch2_val,
86 level_set_callback *change_hook, display_callback *display_hook);
87 void level_edit(struct LevelEdit *lev);
89 #endif /* GUI_LEVELEDIT_H */