// hlist: A basic list selector
//
// This is like jfileselect, but for custom items. And also, maybe, a base for
// a reasonably-generic list view backed by a reasonable list model. Who knows.

#pragma once
#include <justui/defs.h>
#include <justui/jwidget.h>
#include <gint/display.h>

/* hlist: Generic list view and selector

   Events:
   * HLIST_VALIDATED
   * HLIST_CANCELED */
typedef struct {
    jwidget widget;

    /* List of entries; size of individual entries; number of entries */
    void *entries;
    size_t entry_size;
    int entry_count;

    /* Height in pixels for each entry */
    int render_height;
    /* Renderer function */
    void (*render_func)(int x, int y, int w, int h, void *entry,bool selected);

    /* Selected entry ID */
    int selected_index;

    /* Current cursor position (0 .. entry_count-1) */
    int16_t cursor;
    /* Current scroll position */
    int16_t scroll;
    /* Number of visible lines */
    int8_t visible_lines;

} hlist;

/* Event IDs */
extern uint16_t HLIST_VALIDATED;
extern uint16_t HLIST_CANCELED;

/* hlist_create(): Create a list view and selector
   Initially, there is no data and the widget does not handle events. */
hlist *hlist_create(void *parent);

/* hlist_set_entries(): Load the model (list of entries) */
void hlist_set_entries(hlist *l, void *entries, size_t entry_size, int count);

/* hlist_set_renderer(): Set the rendering settings for the entries
   The rendering function should be of type:
     void render(int x, int y, int width, int height,
        void *pointer_to_entry, bool selected); */
void hlist_set_renderer(hlist *h, int entry_height, void *render);

/* hlist_selected_index(): Index of the selected entry
   The selected index is -1 until hlist_set_entries() is called and the user
   selects an entry in the interface. */
int hlist_selected_index(hlist *l);