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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 Thomas Martitz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __LINE_H__
#define __LINE_H__
#include <stdint.h>
#include <stdbool.h>
#include <stdarg.h>
#include "lcd.h"
#include "screens.h"
/* Possible line decoration styles. Specify one of
* STYLE_NONE, _DEFAULT, _INVERT, _COLORBAR or _GRADIENT, and optionally
* or with STYLE_COLORED specifying line_desc.text_color */
enum line_styles {
/* Just print the text. Do not clear or draw line decorations */
STYLE_NONE = 0x00,
/* Line background filled with the bg color (or backdrop if present) */
STYLE_DEFAULT = 0x01,
/* Like STYLE_DFEAULT except that text and background color will be swapped */
STYLE_INVERT = 0x02,
/* Line background filled with line color line_desc.line_color */
STYLE_COLORBAR = 0x04,
/* Line background filled with gradient, colors taken from
* line_desc.line_color and line_desc.line_end_color */
STYLE_GRADIENT = 0x08,
/* Modifier for the text color, which will be taken from line_desc.text_color */
STYLE_COLORED = 0x10,
/* These are used internally */
_STYLE_DECO_MASK = 0x0f,
_STYLE_MODE_MASK = 0x7F,
};
struct line_desc {
/* height of the line (in pixels). -1 to inherit the height
* from the font. The text will be centered if the height is larger,
* but the decorations will span the entire height */
int height;
/* multiline support: For some decorations (e.g. gradient) to work
* across multiple lines (e.g. to draw a line selector across 2 lines)
* the line index and line count must be known. For normal, single
* lines specify nlines=1 and line=0 */
/* line count of a group */
int16_t nlines;
/* index of the line in the group */
int16_t line;
/* line text color if STYLE_COLORED is specified, in native
* lcd format (convert with LCD_RGBPACK() if necessary) */
fb_data text_color;
/* line color if STYLE_COLORBAR or STYLE_GRADIENT is specified, in native
* lcd format (convert with LCD_RGBPACK() if necessary) */
fb_data line_color, line_end_color;
/* line decorations, see STYLE_DEFAULT etc. */
enum line_styles style;
/* whether the line can scroll */
bool scroll;
/* height of the line separator (in pixels). 0 to disable drawing
* of the separator */
int8_t separator_height;
};
/* default initializer, can be used for static initialitation also.
* This initializer will result in single lines without style that don't scroll */
#define LINE_DESC_DEFINIT { .style = STYLE_DEFAULT, .height = -1, .separator_height = 0, .line = 0, .nlines = 1, .scroll = false }
/**
* Print a line at a given pixel postion, using decoration information from
* line and content information from the format specifier. The format specifier
* can include tags that depend on further parameters given to the function
* (similar to the well-known printf()).
*
* Tags start with the $ sign. Below is a list of the currently supported tags:
* $s - insert a column (1px wide) of empty space.
* $S - insert a column (1 char wide) of empty space.
* $i - insert an icon. put_line() expects a corresponding parameter of the
* type 'enum themable_icons'. If Icon_NOICON is passed, then empty
* space (icon-wide) will be inserted.
* $I - insert an icon with padding. Works like $i but additionally
* adds a column (1px wide) of empty space on either side of the icon.
* $t - insert text. put_line() expects a corresponding parameter of the type
* 'const char *'
* $$ - insert a '$' char, use it to escape $.
*
* $I, $s and $S support the following two forms:
* $n[IsS] - inserts n columns (pixels/chars respectively) of empty space
* $*[IsS] - inserts n columns (pixels/chars respectively) of empty space. put_line()
* expects a correspinding paramter of the type 'int' that specifies n.
*
* $t supports the following two forms:
* $nt - skips the first n pixels when displaying the string
* $*t - skips the first n pixels when displaying the string. put_line()
* expects a correspinding paramter of the type 'int' that specifies n.
*
* Inline text will be printed as is (be sure to escape '$') and can be freely
* intermixed with tags. Inline text will be truncated after MAX_PATH+31 bytes.
* If you have a longer inline string use a separate buffer and pass that via $t,
* which does not suffer from this truncation.
*
* Text can appear anywhere, before or after (or both) tags. However, when the
* line can scroll, only the last piece of text (whether inline or via $t) can
* scroll. This is due to a scroll_engine limitation.
*
* x, y - pixel postion of the line.
* line - holds information for the line decorations
* fmt - holds the text and optionally format tags
* ... - additional paramters for the format tags
*
*/
void put_line(struct screen *display,
int x, int y, struct line_desc *line,
const char *fmt, ...);
/**
* Print a line at a given pixel postion, using decoration information from
* line and content information from the format specifier. The format specifier
* can include tags that depend on further parameters given to the function
* (similar to the well-known vprintf()).
*
* For details, see put_line(). This function is equivalent, except for
* accepting a va_list instead of a variable paramter list.
*/
void vput_line(struct screen *display,
int x, int y, struct line_desc *line,
const char *fmt, va_list ap);
#endif /* __LINE_H__*/
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