diff --git a/src/hscroll.h b/src/hscroll.h
index 8b643830de5dca63fccc3f9622f6b7c0669d2295..3e8fd79322b4c3e623ea82074a7c1411ae925a2c 100644 (file)
--- a/src/hscroll.h
+++ b/src/hscroll.h
/* ncmpc (Ncurses MPD Client)
- * (c) 2004-2009 The Music Player Daemon Project
+ * (c) 2004-2010 The Music Player Daemon Project
* Project homepage: http://musicpd.org
* This program is free software; you can redistribute it and/or modify
#ifndef HSCROLL_H
#define HSCROLL_H
+#include "config.h"
+
#include <glib.h>
+#ifdef HAVE_NCURSESW_NCURSES_H
+#include <ncursesw/ncurses.h>
+#else
+#include <ncurses.h>
+#endif
+
+/**
+ * This class is used to auto-scroll text which does not fit on the
+ * screen. Call hscroll_init() to initialize the object,
+ * hscroll_clear() to free resources, and hscroll_set() to begin
+ * scrolling.
+ */
struct hscroll {
+ WINDOW *w;
+ const char *separator;
+
+ /**
+ * The bounding coordinates on the screen.
+ */
+ unsigned x, y, width;
+
+ /**
+ * ncurses attributes for drawing the text.
+ */
+ attr_t attrs;
+
+ /**
+ * ncurses colors for drawing the text.
+ */
+ short pair;
+
+ /**
+ * The scrolled text, in the current locale.
+ */
+ char *text;
+
+ /**
+ * The current scrolling offset. This is a character
+ * position, not a screen column.
+ */
gsize offset;
- GTime t; /* GTime is equivalent to time_t */
+
+ /**
+ * The id of the timer which updates the scrolled area every
+ * second.
+ */
+ guint source_id;
};
+static inline void
+hscroll_reset(struct hscroll *hscroll)
+{
+ hscroll->offset = 0;
+}
+
+static inline void
+hscroll_step(struct hscroll *hscroll)
+{
+ ++hscroll->offset;
+}
+
char *
-strscroll(struct hscroll *hscroll, char *str, char *separator, unsigned width);
+strscroll(struct hscroll *hscroll, const char *str, const char *separator,
+ unsigned width);
+
+/**
+ * Initializes a #hscroll object allocated by the caller.
+ */
+static inline void
+hscroll_init(struct hscroll *hscroll, WINDOW *w, const char *separator)
+{
+ hscroll->w = w;
+ hscroll->separator = separator;
+}
+
+/**
+ * Sets a text to scroll. This installs a timer which redraws every
+ * second with the current window attributes. Call hscroll_clear() to
+ * disable it. This function automatically removes the old text.
+ */
+void
+hscroll_set(struct hscroll *hscroll, unsigned x, unsigned y, unsigned width,
+ const char *text);
+
+/**
+ * Removes the text and the timer. It may be reused with
+ * hscroll_set().
+ */
+void
+hscroll_clear(struct hscroll *hscroll);
+
+/**
+ * Explicitly draws the scrolled text. Calling this function is only
+ * allowed if there is a text currently.
+ */
+void
+hscroll_draw(struct hscroll *hscroll);
#endif