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feature/combobox for struct #754

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feature/combobox for struct #754

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0ccc68d
added support for combo from an array of struct
gooosedev Oct 27, 2024
501b9e3
renamed the function to nk_combo_from_struct_array
gooosedev Oct 28, 2024
326584e
added small example for combobox_for_struct inside overview example
gooosedev Nov 18, 2024
fa7d7f7
Merge branch 'master' of github.com:Immediate-Mode-UI/Nuklear into fe…
RobLoach Dec 7, 2024
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32 changes: 31 additions & 1 deletion demo/common/overview.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ overview(struct nk_context *ctx)

#ifdef INCLUDE_STYLE
/* styles */
static const char* themes[] = {"Black", "White", "Red", "Blue", "Dark", "Dracula",
static const char* themes[] = {"Black", "White", "Red", "Blue", "Dark", "Dracula",
"Catppucin Latte", "Catppucin Frappe", "Catppucin Macchiato", "Catppucin Mocha"};
static int current_theme = 0;
#endif
Expand Down Expand Up @@ -584,6 +584,36 @@ overview(struct nk_context *ctx)
nk_combo_end(ctx);
}
}
{
/* Combobox from array of struct */
static int sel=0;
struct student {
int id;
char* name;
int age;
char* major;
};

static struct student students[4] = {
{0, "----", 0, "----"},
{1, "Mike", 20, "CS"},
{2, "Jim", 19, "Maths"},
{3, "Julia", 20, "Biology"}
};
sel = nk_combo_from_struct_array(ctx, &students, 4,
sizeof(struct student),
offsetof(struct student, name),
sel, 15, nk_vec2(200,200));
if(sel>0){
nk_layout_row_static(ctx, 30,300, 2);
nk_labelf(ctx, NK_TEXT_LEFT, "id:%d | name:%s | age:%d | major:%s",
students[sel].id,
students[sel].name,
students[sel].age,
students[sel].major
);
}
}

nk_tree_pop(ctx);
}
Expand Down
38 changes: 37 additions & 1 deletion nuklear.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3765,7 +3765,8 @@ NK_API int nk_combo(struct nk_context*, const char *const *items, int count, int
NK_API int nk_combo_separator(struct nk_context*, const char *items_separated_by_separator, int separator, int selected, int count, int item_height, struct nk_vec2 size);
NK_API int nk_combo_string(struct nk_context*, const char *items_separated_by_zeros, int selected, int count, int item_height, struct nk_vec2 size);
NK_API int nk_combo_callback(struct nk_context*, void(*item_getter)(void*, int, const char**), void *userdata, int selected, int count, int item_height, struct nk_vec2 size);
NK_API void nk_combobox(struct nk_context*, const char *const *items, int count, int *selected, int item_height, struct nk_vec2 size);
NK_API int nk_combo_from_struct_array(struct nk_context *ctx, const void *items, int count, int item_sz, int stride, int selected, int item_height, struct nk_vec2 size);
NK_API void nk_combobox(struct nk_context*, const char **items, int count, int *selected, int item_height, struct nk_vec2 size);
NK_API void nk_combobox_string(struct nk_context*, const char *items_separated_by_zeros, int *selected, int count, int item_height, struct nk_vec2 size);
NK_API void nk_combobox_separator(struct nk_context*, const char *items_separated_by_separator, int separator, int *selected, int count, int item_height, struct nk_vec2 size);
NK_API void nk_combobox_callback(struct nk_context*, void(*item_getter)(void*, int, const char**), void*, int *selected, int count, int item_height, struct nk_vec2 size);
Expand Down Expand Up @@ -30504,6 +30505,41 @@ nk_combo_callback(struct nk_context *ctx, void(*item_getter)(void*, int, const c
nk_combo_end(ctx);
} return selected;
}


NK_API int nk_combo_from_struct_array(struct nk_context *ctx, const void *items, int count, int item_sz, int stride, int selected, int item_height, struct nk_vec2 size)
{
int i = 0;
int max_height;
struct nk_vec2 item_spacing;
struct nk_vec2 window_padding;
char* sel;
char* name;
NK_ASSERT(ctx);
NK_ASSERT(items);
NK_ASSERT(ctx->current);
if (!ctx || !items ||!count)
return selected;

item_spacing = ctx->style.window.spacing;
window_padding = nk_panel_get_padding(&ctx->style, ctx->current->layout->type);
max_height = count * item_height + count * (int)item_spacing.y;
max_height += (int)item_spacing.y * 2 + (int)window_padding.y * 2;
size.y = NK_MIN(size.y, (float)max_height);
sel = *(char**)((char*)items + (item_sz*selected) + stride);
if (nk_combo_begin_label(ctx, sel, size)) {
nk_layout_row_dynamic(ctx, (float)item_height, 1);
for (i = 0; i < count; ++i) {
name = *(char**)((char*)items + stride);
if (nk_combo_item_label(ctx, name, NK_TEXT_LEFT))
selected = i;
items = (char*)items + item_sz;
}
nk_combo_end(ctx);
}
return selected;
}

NK_API void
nk_combobox(struct nk_context *ctx, const char *const *items, int count,
int *selected, int item_height, struct nk_vec2 size)
Expand Down
3 changes: 2 additions & 1 deletion src/nuklear.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3543,7 +3543,8 @@ NK_API int nk_combo(struct nk_context*, const char *const *items, int count, int
NK_API int nk_combo_separator(struct nk_context*, const char *items_separated_by_separator, int separator, int selected, int count, int item_height, struct nk_vec2 size);
NK_API int nk_combo_string(struct nk_context*, const char *items_separated_by_zeros, int selected, int count, int item_height, struct nk_vec2 size);
NK_API int nk_combo_callback(struct nk_context*, void(*item_getter)(void*, int, const char**), void *userdata, int selected, int count, int item_height, struct nk_vec2 size);
NK_API void nk_combobox(struct nk_context*, const char *const *items, int count, int *selected, int item_height, struct nk_vec2 size);
NK_API int nk_combo_from_struct_array(struct nk_context *ctx, const void *items, int count, int item_sz, int stride, int selected, int item_height, struct nk_vec2 size);
NK_API void nk_combobox(struct nk_context*, const char **items, int count, int *selected, int item_height, struct nk_vec2 size);
NK_API void nk_combobox_string(struct nk_context*, const char *items_separated_by_zeros, int *selected, int count, int item_height, struct nk_vec2 size);
NK_API void nk_combobox_separator(struct nk_context*, const char *items_separated_by_separator, int separator, int *selected, int count, int item_height, struct nk_vec2 size);
NK_API void nk_combobox_callback(struct nk_context*, void(*item_getter)(void*, int, const char**), void*, int *selected, int count, int item_height, struct nk_vec2 size);
Expand Down
35 changes: 35 additions & 0 deletions src/nuklear_combo.c
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Original file line number Diff line number Diff line change
Expand Up @@ -819,6 +819,41 @@ nk_combo_callback(struct nk_context *ctx, void(*item_getter)(void*, int, const c
nk_combo_end(ctx);
} return selected;
}


NK_API int nk_combo_from_struct_array(struct nk_context *ctx, const void *items, int count, int item_sz, int stride, int selected, int item_height, struct nk_vec2 size)
{
int i = 0;
int max_height;
struct nk_vec2 item_spacing;
struct nk_vec2 window_padding;
char* sel;
char* name;
NK_ASSERT(ctx);
NK_ASSERT(items);
NK_ASSERT(ctx->current);
if (!ctx || !items ||!count)
return selected;

item_spacing = ctx->style.window.spacing;
window_padding = nk_panel_get_padding(&ctx->style, ctx->current->layout->type);
max_height = count * item_height + count * (int)item_spacing.y;
max_height += (int)item_spacing.y * 2 + (int)window_padding.y * 2;
size.y = NK_MIN(size.y, (float)max_height);
sel = *(char**)((char*)items + (item_sz*selected) + stride);
if (nk_combo_begin_label(ctx, sel, size)) {
nk_layout_row_dynamic(ctx, (float)item_height, 1);
for (i = 0; i < count; ++i) {
name = *(char**)((char*)items + stride);
if (nk_combo_item_label(ctx, name, NK_TEXT_LEFT))
selected = i;
items = (char*)items + item_sz;
}
nk_combo_end(ctx);
}
return selected;
}

NK_API void
nk_combobox(struct nk_context *ctx, const char *const *items, int count,
int *selected, int item_height, struct nk_vec2 size)
Expand Down
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