77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
#include <gint/defs/util.h>
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#include <gintctl/menu.h>
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#include <gintctl/util.h>
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/* menu_init(): Initialize a menu list */
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void menu_init(struct menu *menu, int visible)
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{
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menu->len = 0;
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while(menu->entries[menu->len].name) menu->len++;
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menu->offset = 0;
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menu->pos = 0;
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menu->visible = visible;
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}
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/* menu_move(): Move the cursor in a menu */
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void menu_move(struct menu *menu, int key, int wrap)
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{
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int max_offset = max(menu->len - menu->visible, 0);
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if(key == KEY_UP && menu->pos > 0)
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{
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menu->pos--;
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menu->offset = min(menu->offset, menu->pos);
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}
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else if(key == KEY_UP && !menu->pos && wrap)
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{
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menu->pos = menu->len - 1;
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menu->offset = max_offset;
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}
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if(key == KEY_DOWN && menu->pos + 1 < menu->len)
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{
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menu->pos++;
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if(menu->pos > menu->offset + menu->visible - 1
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&& menu->offset + 1 < max_offset)
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{
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menu->offset++;
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}
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}
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else if(key == KEY_DOWN && menu->pos + 1 == menu->len && wrap)
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{
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menu->pos = 0;
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menu->offset = 0;
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}
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}
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/* menu_show(): Render a list menu */
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void menu_show(struct menu const *menu)
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{
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struct menuentry const *items = menu->entries;
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int offset = menu->offset, pos = menu->pos;
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int i = 0;
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row_title(menu->name);
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while(i+1 <= menu->visible && items[offset+i].name)
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{
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row_print(i+1, 2, items[offset+i].name);
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i++;
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}
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if(offset > 0) row_right(1, "^");
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if(items[offset+i].name) row_right(row_count(), "v");
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int selected = pos - offset + 1;
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if(selected >= 1 && selected <= menu->visible) row_highlight(selected);
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}
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/* menu_exec(): Execute the currently-selected function of a menu */
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void menu_exec(struct menu const *menu)
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{
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void (*fun)(void) = menu->entries[menu->pos].function;
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if(fun) fun();
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}
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