124 lines
2.5 KiB
C
124 lines
2.5 KiB
C
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#include "menu.h"
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/* this function must be the last function in the list. it also marks the end of a list */
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int me_cb_null(menu_t *menu, const me_t *me, uint8_t msg)
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{
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return 0;
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}
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int me_cb_0_9(menu_t *menu, const me_t *me, uint8_t msg)
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{
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switch(msg)
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{
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case ME_MSG_IS_FOCUS:
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return 1;
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case ME_MSG_GET_BBX:
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menu->x = me->x;
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menu->y = me->y - u8g2_GetAscent(menu->u8g2);
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menu->w = u8g2_GetGlyphWidth(menu->u8g2, '0')-1;
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menu->h = u8g2_GetAscent(menu->u8g2) ;
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return 1;
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case ME_MSG_SELECT:
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{
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uint8_t val = *(uint8_t *)(me->arg);
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val++;
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if ( val > 9 )
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val = 0;
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*(uint8_t *)(me->arg) = val;
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}
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return 1;
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case ME_MSG_DRAW:
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u8g2_DrawGlyph(menu->u8g2, me->x, me->y, *(uint8_t *)(me->arg) + '0');
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return 1;
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}
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return 0;
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}
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/* call menu element from menu->current_index */
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int menu_CallME(menu_t *menu, uint8_t msg)
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{
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const me_t *me;
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me = menu->me_list+menu->current_index;
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return me->cb(menu, me, msg);
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}
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/* stay on current focus if valid, move to next valid focus */
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static void menu_CalcNextValidFocus(menu_t *menu) U8G2_NOINLINE;
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static void menu_CalcNextValidFocus(menu_t *menu)
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{
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for(;;)
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{
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menu->current_index = menu->focus_index;
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if ( menu->current_index >= menu->me_count )
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break;
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if ( menu_CallME(menu, ME_MSG_IS_FOCUS) != 0 )
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break;
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menu->focus_index++;
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}
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}
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void menu_NextFocus(menu_t *menu)
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{
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menu->focus_index++;
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if ( menu->focus_index >= menu->me_count )
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menu->focus_index = 0;
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menu_CalcNextValidFocus(menu);
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}
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void menu_SetMEList(menu_t *menu, const me_t *me_list, uint16_t initial_focus)
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{
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menu->me_list = me_list;
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menu->me_count = 0;
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while( me_list[menu->me_count].cb != me_cb_null )
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menu->me_count++;
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menu->focus_index = 0;
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menu_CalcNextValidFocus(menu);
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menu->radio_index = menu->me_count;
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}
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me_t melist_emty[] =
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{
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{ me_cb_null, NULL, 0, 0 }
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};
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void menu_Init(menu_t *menu, u8g2_t *u8g2)
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{
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menu->u8g2 = u8g2;
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menu_SetMEList(menu, melist_emty, 0);
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}
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/* draw focus for menu->current_index */
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void menu_DrawFocus(menu_t *menu)
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{
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menu_CallME(menu, ME_MSG_GET_BBX);
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menu->x--;
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menu->y--;
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menu->h+=2;
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menu->w+=2;
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u8g2_DrawRFrame(menu->u8g2, menu->x, menu->y, menu->w, menu->h, 3);
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}
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void menu_Draw(menu_t *menu)
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{
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for( menu->current_index = 0; menu->current_index < menu->me_count; menu->current_index++ )
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{
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menu_CallME(menu, ME_MSG_DRAW);
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if ( menu->current_index == menu->focus_index )
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{
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menu_DrawFocus(menu);
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}
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}
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}
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