mirror of
https://git.planet-casio.com/Lephenixnoir/JustUI.git
synced 2024-12-28 04:23:40 +01:00
134 lines
5 KiB
C
134 lines
5 KiB
C
//---
|
|
// JustUI.jlabel: Simple one-line or multi-line text label without formatting
|
|
//---
|
|
|
|
#ifndef _J_JLABEL
|
|
#define _J_JLABEL
|
|
|
|
#include <justui/defs.h>
|
|
#include <justui/jwidget.h>
|
|
#include <justui/p/vec.h>
|
|
|
|
#include <gint/display.h>
|
|
|
|
/* jlabel_wrapmode: Text wrapping options */
|
|
typedef enum jwrapmode {
|
|
/* Wrap only at \n characters */
|
|
J_WRAP_NONE,
|
|
/* Break only at spaces; if a word is longer than a full line, breaking in
|
|
that word is allowed */
|
|
J_WRAP_WORD,
|
|
/* Break only at spaces and tabs, even if a word is longer than a line */
|
|
J_WRAP_WORD_ONLY,
|
|
/* Break at any letter */
|
|
J_WRAP_LETTER,
|
|
|
|
} __attribute__((packed)) jwrapmode;
|
|
|
|
/* jlabel: One-line or multi-line piece of text, without formatting.
|
|
|
|
This widget is used for mundane text printing. All the text in the label is
|
|
printed with a single font. The text can be aligned horizontally and
|
|
vertically within the widget ("block alignment"), and the lines can also be
|
|
aligned horizontally within the text block ("text alignment").
|
|
|
|
+-------------+
|
|
| label | Text is centered within the widget (block centered).
|
|
| 1 | Lines are aligned by their center (text centered).
|
|
+-------------+
|
|
|
|
+-------------+
|
|
| label | Text is centered within the widget (block centered).
|
|
| 2 | Lines are aligned by their left side (text left).
|
|
+-------------+
|
|
|
|
+-------------+
|
|
|label | Text is aligned left within the widget (block left).
|
|
| 3 | Lines are aligned by their center (text centered).
|
|
+-------------+
|
|
|
|
Lines are broken at '\n' characters. Depending on the word wrap settings,
|
|
lines can also be broken whenever the edge of the widget is reached. Extra
|
|
line spacing (even negative) can be specified.
|
|
|
|
The natural size of the widget is always computed based on newline
|
|
characters, since there is no way to wrap until a width has been assigned.
|
|
If you want predictable results, use size constraints.
|
|
|
|
The text color and font can also be set, using the same color values and
|
|
fonts as <gint/display.h>. If the font is set to NULL, gint's default font
|
|
is used. The background color for the whole widget is handled by jwidget. */
|
|
typedef struct {
|
|
jwidget widget;
|
|
|
|
/* Horizontal block alignment */
|
|
jalign block_halign;
|
|
/* Vertical block alignment */
|
|
jalign block_valign;
|
|
/* Text alignment */
|
|
jalign text_align;
|
|
/* Pixels of spacing between each line, in addition to font->height */
|
|
int8_t line_spacing;
|
|
|
|
/* Text to display */
|
|
char const *text;
|
|
/* List of line break offsets; indexes 2n and 2n+1 give the start and end
|
|
of line number n */
|
|
DECLARE_VEC(uint16_t, breaks);
|
|
|
|
/* Text wrapping mode */
|
|
enum jwrapmode wrap_mode;
|
|
/* Whether the text has been allocated by the label or supplied by user */
|
|
int8_t owns_text;
|
|
/* Block width (maximum length of a rendered line) */
|
|
uint16_t block_width;
|
|
|
|
/* Color and font of text; if NULL, gint's default font is used */
|
|
int color;
|
|
font_t const *font;
|
|
|
|
} jlabel;
|
|
|
|
/* jlabel_create(): Create a label with a fixed text
|
|
|
|
Initially the label has the supplied string as text (which must outlive the
|
|
widget). If you want dynamic text, you can provide an empty string and use
|
|
jlabel_printf() later. */
|
|
jlabel *jlabel_create(char const *text, void *parent);
|
|
|
|
/* jlabel_set_text(): Set a fixed string
|
|
This function sets the label text to a fixed string. This is the same as in
|
|
jlabel_create(). The string is not copied, it must outlive the label. This
|
|
is the most useful when the provided string is a literal. */
|
|
void jlabel_set_text(jlabel *l, char const *text);
|
|
|
|
/* jlabel_asprintf(): Generate and set a formatted string
|
|
This function generates the label string with printf-formatting. The
|
|
resulting string is created with malloc() and owned by the label; it is
|
|
destroyed when the text is replaced of the label is destroyed. Because of
|
|
how asprintf() works, the string is generated twice. Returns the number of
|
|
characters printed. */
|
|
int jlabel_asprintf(jlabel *l, char const *format, ...);
|
|
|
|
/* jlabel_snprintf(): Generate and set a formatted string
|
|
Similar to jlabel_asprintf(), but an upper bound on the length of the result
|
|
string has to be provided. This avoids generating the string twice. Return
|
|
the number of characters printed. */
|
|
int jlabel_snprintf(jlabel *l, size_t size, char const *format, ...);
|
|
|
|
/* jlabel_text(): Get the current string */
|
|
char const *jlabel_text(jlabel *l);
|
|
|
|
/* Set block and text alignment, individually */
|
|
void jlabel_set_block_alignment(jlabel *l, jalign horz, jalign vert);
|
|
void jlabel_set_text_alignment(jlabel *l, jalign align);
|
|
/* Set both horizontal alignments at the same time (most natural) */
|
|
void jlabel_set_alignment(jlabel *l, jalign horizontal_align);
|
|
|
|
/* Trivial properties */
|
|
void jlabel_set_line_spacing(jlabel *l, int line_spacing);
|
|
void jlabel_set_wrap_mode(jlabel *l, jwrapmode mode);
|
|
void jlabel_set_text_color(jlabel *l, int color);
|
|
void jlabel_set_font(jlabel *l, font_t const *font);
|
|
|
|
#endif /* _J_JLABEL */
|