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jlist: add user data pointer

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This allows the info and paint functions to access user data associated
with the list without going through globals.
This commit is contained in:
Lephenixnoir 2024-09-04 08:51:41 +02:00
parent 12b29f8223
commit 7587dfa17c
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GPG key ID: 1BBA026E13FC0495
2 changed files with 10 additions and 4 deletions
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7
include/justui/jlist.h
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@ -77,6 +77,8 @@ typedef struct jlist {
/* Currently selected item, -1 if none */ /* Currently selected item, -1 if none */
int cursor; int cursor;
/* User data pointer */
void *user;
} jlist; } jlist;
@ -91,8 +93,9 @@ jlist *jlist_create(jlist_item_info_function info_function,
/* jlist_update_model(): Update jlists's information about the model /* jlist_update_model(): Update jlists's information about the model
The new model size is passed as parameter. The model is refreshed by The new model size is passed as parameter. The model is refreshed by
repeatedly calling the info function. */ repeatedly calling the info function. The user pointer is also updated. To
void jlist_update_model(jlist *l, int item_count); keep it unchanged, pass `l->user` as third parameter. */
void jlist_update_model(jlist *l, int item_count, void *user);
/* jlist_clear(): Remove all items */ /* jlist_clear(): Remove all items */
void jlist_clear(jlist *l); void jlist_clear(jlist *l);

7
src/jlist.c
View file

@ -37,6 +37,7 @@ jlist *jlist_create(jlist_item_info_function info_function,
l->info_function = info_function; l->info_function = info_function;
l->paint_function = paint_function; l->paint_function = paint_function;
l->cursor = -1; l->cursor = -1;
l->user = NULL;
return l; return l;
} }
@ -113,8 +114,10 @@ int jlist_selected_item(jlist *l)
// Item management // Item management
//--- //---
void jlist_update_model(jlist *l, int item_count) void jlist_update_model(jlist *l, int item_count, void *user)
{ {
l->user = user;
if(l->item_count != item_count) { if(l->item_count != item_count) {
l->items = realloc(l->items, item_count * sizeof *l->items); l->items = realloc(l->items, item_count * sizeof *l->items);
if(!l->items) { if(!l->items) {
@ -138,7 +141,7 @@ void jlist_update_model(jlist *l, int item_count)
void jlist_clear(jlist *l) void jlist_clear(jlist *l)
{ {
jlist_update_model(l, 0); jlist_update_model(l, 0, NULL);
} }
jrect jlist_selected_region(jlist *l) jrect jlist_selected_region(jlist *l)