menubar.c

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#include "menubar.h"

#include <gfx/gfx.h>
#include <gfx/text.h>
#include <gfx/font.h>
#include <cfg/compiler.h>

#if CPU_AVR
    #include <avr/pgmspace.h> /* strlen_P() */
#else
    #define strlen_P(s)             strlen(s)
    #define text_puts_P(s, b)       text_puts(s, b)
    #define pgm_read_uint16_t(addr) (*(addr))
#endif

#include <string.h> /* strlen, memcpy */


static const pgm_char lab_1[]  = "";
static const pgm_char lab_2[]  = "mute";
static const pgm_char lab_3[]  = "menu";
static const pgm_char lab_4[]  = "back";
static const pgm_char lab_5[]  = " ok ";
static const pgm_char lab_6[]  = "Ch 1";
static const pgm_char lab_7[]  = "Ch 2";
static const pgm_char lab_8[]  = "C1+2";
static const pgm_char lab_9[]  = " "UP_ARROW" ";
static const pgm_char lab_10[] = " "DOWN_ARROW" ";
static const pgm_char lab_11[] = " - ";
static const pgm_char lab_12[] = " + ";
static const pgm_char lab_13[] = "sel ";
#if OEM_BRAND == OEM_CLAIRBROS
static const pgm_char lab_14[] = "gain";
#else
static const pgm_char lab_14[] = "lock";
#endif
static const pgm_char lab_15[] = "unlock";
static const pgm_char lab_16[] = "more";
static const pgm_char lab_17[] = "edit";
static const pgm_char lab_18[] = "fast";
static const pgm_char lab_19[] = LEFT_ARROW" ";
static const pgm_char lab_20[] = " "RIGHT_ARROW;
static const pgm_char lab_21[] = "slow";
static const pgm_char lab_22[] = "yes";
static const pgm_char lab_23[] = "no";


static const pgm_char * PROGMEM label_strings[LABEL_CNT] = {
    lab_1, lab_2, lab_3, lab_4, lab_5, lab_6, lab_7, lab_8, lab_9,
    lab_10, lab_11, lab_12, lab_13, lab_14, lab_15, lab_16, lab_17,
    lab_18, lab_19, lab_20, lab_21, lab_22, lab_23
};

#define PTRLBL(x) ((unsigned int)(x) < 256 ? \
    (const pgm_char *)pgm_read_uint16_t(label_strings + (unsigned int)(x)) \
    : (const pgm_char *)(x))


void mbar_init(
        struct MenuBar *mb,
        struct Bitmap *bmp,
        const_iptr_t labels[],
        int num_labels)
{
    mb->bitmap     = bmp;
    mb->labels     = labels;
    mb->num_labels = num_labels;
}


void mbar_draw(const struct MenuBar *mb)
{
    uint8_t oldstyle;
    int i;
    size_t maxlen = 0;  /* Length of the longest label */
    coord_t x1, x2, y1, y2, label_padding;

    /* Maximum space available for a label */
    coord_t slot_width = mb->bitmap->width / mb->num_labels;

    /* Find longest label */
    for (i = 0; i < mb->num_labels; i++)
        if (strlen_P(PTRLBL(mb->labels[i])) > maxlen)
            maxlen = strlen_P(PTRLBL(mb->labels[i]));

    oldstyle = text_style(mb->bitmap, STYLEF_INVERT, STYLEF_MASK);

    /* y coords for menubar: bottom of the bitmap */
    y1 = mb->bitmap->height - FONT_HEIGHT;
    y2 = mb->bitmap->height;

    /* Clear menubar area */
    gfx_rectClear(mb->bitmap, 0, y1, mb->bitmap->width, y2);

    for (i = 0; i < mb->num_labels; i++)
    {
        size_t lablen = strlen_P(PTRLBL(mb->labels[i]));

        /* Don't draw empty labels */
        if (mb->labels[i] == (const_iptr_t)LABEL_EMPTY)
            continue;

        /* x coords: magic formula for equal distribution of the
         * labels along bitmap
         */
        label_padding = slot_width - (FONT_WIDTH * lablen + 2);
        x1 = i * (slot_width + (label_padding / (mb->num_labels - 1)));
        x2 = x1 + lablen * FONT_WIDTH + 1;

        /* Draw vertical line before.
         * Uncomment +1 for "rounded" menubars */
        gfx_line(mb->bitmap, x1, y1 /* + 1 */, x1, y2);

        /* Draw text */
        text_setCoord(mb->bitmap, x1 + 1, y1);
        text_puts_P(PTRLBL(mb->labels[i]), mb->bitmap);

        /* Draw vertical line after
         * Uncomment +1 for "rounded" menubars */
        gfx_line(mb->bitmap, x2, y1 /* + 1 */, x2, y2);
    }

    text_style(mb->bitmap, oldstyle, STYLEF_MASK);
}