Import into DevLib.

[bertos.git] / gui / leveledit.h

diff --git a/gui/leveledit.h b/gui/leveledit.h
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+++ b/gui/leveledit.h
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+/**
+ * \file
+ * <!--
+ * Copyright 2004, 2006 Develer S.r.l. (http://www.develer.com/)
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \brief Generic editor for (volume/gain/contrast/...) setting.
+ *
+ * \version $Id$
+ *
+ * \author Stefano Fedrigo <aleph@develer.com>
+ */
+#ifndef GUI_LEVELEDIT_H
+#define GUI_LEVELEDIT_H
+
+//#include <gui/levelbar.h>
+
+/* Type for level_init */
+#define LEVELEDIT_NOBAR  0  /**< Edit numeber only, without bar nor units */
+#define LEVELEDIT_SINGLE 1  /**< Single channel editing */
+#define LEVELEDIT_DOUBLE 2  /**< Double channel editing */
+
+
+
+/* Fwd decl */
+struct Bitmap;
+struct LevelEdit;
+
+/** Type for callback used to set meter levels */
+typedef void level_set_callback(void);
+
+/** Type for callback used to customize display of units */
+typedef void display_callback(struct LevelEdit *);
+
+/**
+ * State of a level meter
+ */
+typedef struct LevelEdit {
+       int type;           /*<! Type of level edititing mode (see prev defines) */
+       const char *title;  /*<! Title on top of screen */
+       const char *unit;   /*<! Unit of quantity changed by this LevelEdit */
+       int min;            /*<! Minimum level */
+       int max;            /*<! Maximum level */
+       int step;           /*<! Value of a single increment/decrement */
+
+       level_set_callback *set_hook;     /*<! Callback called when a value is changed  */
+       display_callback   *display_hook; /*<! Callback for complex unit display */
+       int *ch1_val;                     /*<! (left) Value edited by this leveledit */
+       int *ch2_val;                     /*<! Right channel edited */
+
+       struct Bitmap   *bitmap;  /*<! Bitmap where the whole thing is rendered */
+} LevelEdit;
+
+
+void level_init(struct LevelEdit *lev,
+               int type,
+               struct Bitmap *bmp, const char *title, const char *unit,
+               int min, int max, int step,
+               int *ch1_val, int *ch2_val,
+               level_set_callback *change_hook, display_callback *display_hook);
+void level_edit(struct LevelEdit *lev);
+
+#endif /* GUI_LEVELEDIT_H */