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4coder/4ed_gui.cpp

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/*
* Mr. 4th Dimention - Allen Webster
*
* 20.02.2016
*
* GUI system for 4coder
*
*/
// TOP
struct Query_Slot{
Query_Slot *next;
Query_Bar *query_bar;
};
struct Query_Set{
Query_Slot slots[8];
Query_Slot *free_slot;
Query_Slot *used_slot;
};
internal void
init_query_set(Query_Set *set){
Query_Slot *slot = set->slots;
int32_t i;
set->free_slot = slot;
set->used_slot = 0;
for (i = 0; i+1 < ArrayCount(set->slots); ++i, ++slot){
slot->next = slot + 1;
}
}
internal Query_Slot*
alloc_query_slot(Query_Set *set){
Query_Slot *slot = set->free_slot;
if (slot != 0){
set->free_slot = slot->next;
slot->next = set->used_slot;
set->used_slot = slot;
}
return(slot);
}
internal void
free_query_slot(Query_Set *set, Query_Bar *match_bar){
Query_Slot *slot = 0, *prev = 0;
for (slot = set->used_slot; slot != 0; slot = slot->next){
if (slot->query_bar == match_bar) break;
prev = slot;
}
if (slot){
if (prev){
prev->next = slot->next;
}
else{
set->used_slot = slot->next;
}
slot->next = set->free_slot;
set->free_slot = slot;
}
}
struct Super_Color{
Vec4 hsla;
Vec4 rgba;
u32 *out;
};
internal Super_Color
super_color_create(u32 packed){
Super_Color result = {};
result.rgba = unpack_color4(packed);
result.hsla = rgba_to_hsla(result.rgba);
return result;
}
internal void
super_color_post_hsla(Super_Color *color, Vec4 hsla){
color->hsla = hsla;
if (hsla.h == 1.f)
hsla.h = 0.f;
color->rgba = hsla_to_rgba(hsla);
*color->out = pack_color4(color->rgba);
}
internal void
super_color_post_rgba(Super_Color *color, Vec4 rgba){
color->rgba = rgba;
color->hsla = rgba_to_hsla(rgba);
*color->out = pack_color4(rgba);
}
internal void
super_color_post_packed(Super_Color *color, u32 packed){
color->rgba = unpack_color4(packed);
color->hsla = rgba_to_hsla(color->rgba);
*color->out = packed;
}
u32 super_color_clear_masks[] = {0xFF00FFFF, 0xFFFF00FF, 0xFFFFFF00};
u32 super_color_shifts[] = {16, 8, 0};
internal u32
super_color_post_byte(Super_Color *color, i32 channel, u8 byte){
u32 packed = *color->out;
packed &= super_color_clear_masks[channel];
packed |= (byte << super_color_shifts[channel]);
super_color_post_packed(color, packed);
return packed;
}
struct GUI_Target{
Partition push;
GUI_id active;
GUI_id mouse_hot;
GUI_id auto_hot;
GUI_id hover;
// TODO(allen): Can we remove original yet?
GUI_Scroll_Vars scroll_original;
i32_Rect region_original;
//GUI_Scroll_Vars scroll_updated;
i32_Rect region_updated;
// TODO(allen): Would rather have a way of tracking this
// for more than one list. Perhaps just throw in a hash table?
// Or maybe this only needs to be tracked for the active list.
i32 list_max;
b32 has_list_index_position;
i32_Rect list_index_position;
i32 list_view_min;
i32 list_view_max;
GUI_id scroll_id;
i32 delta;
b32 has_keys;
b32 animating;
b32 did_file;
};
struct GUI_Item_Update{
i32 partition_point;
b32 has_adjustment;
i32 adjustment_value;
b32 has_index_position;
i32_Rect index_position;
};
struct GUI_Header{
i32 type;
i32 size;
};
struct GUI_Interactive{
GUI_Header h;
GUI_id id;
};
struct GUI_Edit{
GUI_Header h;
GUI_id id;
void *out;
};
enum GUI_Command_Type{
guicom_null,
guicom_begin_serial,
guicom_end_serial,
guicom_top_bar,
guicom_file,
guicom_text_field,
guicom_color_button,
guicom_font_button,
guicom_text_with_cursor,
guicom_begin_list,
guicom_end_list,
guicom_file_option,
guicom_fixed_option,
guicom_button,
guicom_fixed_option_checkbox,
guicom_style_preview,
guicom_scrollable,
guicom_scrollable_bar,
guicom_scrollable_top,
guicom_scrollable_slider,
guicom_scrollable_bottom,
guicom_scrollable_invisible,
guicom_begin_scrollable_section,
guicom_end_scrollable_section,
};
inline b32
gui_id_eq(GUI_id id1, GUI_id id2){
b32 result = (id1.id[0] == id2.id[0] && id1.id[1] == id2.id[1]);
return(result);
}
inline b32
gui_id_is_null(GUI_id id){
b32 result = (id.id[0] == 0 && id.id[1] == 0);
return(result);
}
internal i32
gui_active_level(GUI_Target *target, GUI_id id){
i32 level = 0;
if (gui_id_eq(target->active, id)){
level = 4;
}
else if (gui_id_eq(target->auto_hot, id)){
level = 3;
}
else if (gui_id_eq(target->mouse_hot, id)){
if (gui_id_eq(target->hover, id)){
level = 3;
}
else{
level = 2;
}
}
else if (gui_id_eq(target->hover, id) && gui_id_is_null(target->mouse_hot)){
level = 1;
}
return(level);
}
internal void
gui_rollback(GUI_Target *target, GUI_Item_Update *update){
target->push.pos = update->partition_point;
}
internal void
gui_fill_update(GUI_Item_Update *update, GUI_Target *target, GUI_Header *h){
if (update){
update->partition_point = (i32)((char*)h - (char*)target->push.base);
update->has_adjustment = 0;
update->has_index_position = 0;
}
}
internal void
gui_update_adjustment(GUI_Item_Update *update, i32 adjustment_value){
if (update){
update->has_adjustment = 1;
update->adjustment_value = adjustment_value;
}
}
internal void
gui_update_position(GUI_Item_Update *update, i32_Rect position){
if (update){
update->has_index_position = 1;
update->index_position = position;
}
}
internal void*
gui_push_item(GUI_Target *target, void *item, i32 size){
void *dest = 0;
if (size == 0){
dest = partition_current(&target->push);
}
else{
dest = partition_allocate(&target->push, size);
if (dest && item){
memcpy(dest, item, size);
}
}
return(dest);
}
internal void*
gui_align(GUI_Target *target){
void *ptr;
partition_align(&target->push, 8);
ptr = partition_current(&target->push);
return(ptr);
}
internal void*
gui_align(GUI_Target *target, GUI_Header *h){
void *ptr;
partition_align(&target->push, 8);
ptr = partition_current(&target->push);
h->size = (i32)((char*)ptr - (char*)h);
return(ptr);
}
internal void*
advance_to_alignment(void *ptr){
u64 p = (u64)ptr;
p = (p + 7) & (~7);
return (void*)p;
}
internal void*
gui_push_aligned_item(GUI_Target *target, GUI_Header *h, void *item, i32 size){
char *ptr = (char*)partition_allocate(&target->push, size);
if (ptr && item){
memcpy(ptr, item, size);
}
gui_align(target, h);
return(ptr);
}
internal void*
gui_push_item(GUI_Target *target, GUI_Header *h, void *item, i32 size){
void *ptr;
ptr = (char*)partition_allocate(&target->push, size);
if (ptr && item){
memcpy(ptr, item, size);
}
h->size += size;
return(ptr);
}
internal GUI_Header*
gui_push_simple_command(GUI_Target *target, i32 type){
GUI_Header *result = 0;
GUI_Header item;
item.type = type;
item.size = sizeof(item);
result = (GUI_Header*)gui_push_item(target, &item, sizeof(item));
return(result);
}
internal GUI_Edit*
gui_push_string_edit_command(GUI_Target *target, i32 type, GUI_id id, void *out){
GUI_Edit *result = 0;
GUI_Edit item;
item.h.type = type;
item.h.size = sizeof(item);
item.id = id;
item.out = out;
result = (GUI_Edit*)gui_push_item(target, &item, sizeof(item));
return(result);
}
internal GUI_Interactive*
gui_push_button_command(GUI_Target *target, i32 type, GUI_id id){
GUI_Interactive *result = 0;
GUI_Interactive item;
item.h.type = type;
item.h.size = sizeof(item);
item.id = id;
result = (GUI_Interactive*)gui_push_item(target, &item, sizeof(item));
return(result);
}
internal void
gui_push_string(GUI_Target *target, GUI_Header *h, String s, i32 extra){
u8 *start, *end, *str_start;
i32 size;
i32 *cap;
start = (u8*)gui_push_item(target, &s.size, sizeof(s.size));
cap = (i32*)gui_push_item(target, 0, sizeof(i32));
str_start = (u8*)gui_push_item(target, s.str, s.size);
if (extra) gui_push_item(target, 0, extra);
end = (u8*)gui_align(target);
size = (i32)(end - start);
*cap = (i32)(end - str_start);
h->size += size;
}
internal void
gui_push_string(GUI_Target *target, GUI_Header *h, String s){
gui_push_string(target, h, s, 0);
}
internal void
gui_begin_serial_section(GUI_Target *target){
gui_push_simple_command(target, guicom_begin_serial);
}
internal void
gui_end_serial_section(GUI_Target *target){
gui_push_simple_command(target, guicom_end_serial);
}
internal void
gui_begin_top_level(GUI_Target *target, Input_Summary input){
target->push.pos = 0;
target->has_keys = (input.keys.count > 0);
target->animating = 0;
target->did_file = 0;
}
internal void
gui_end_top_level(GUI_Target *target){
gui_push_simple_command(target, guicom_null);
target->has_list_index_position = 0;
}
internal void
gui_do_top_bar(GUI_Target *target){
gui_push_simple_command(target, guicom_top_bar);
}
internal void
gui_do_file(GUI_Target *target){
gui_push_simple_command(target, guicom_file);
target->did_file = 1;
}
internal void
gui_do_text_field(GUI_Target *target, String prompt, String text){
GUI_Header *h = gui_push_simple_command(target, guicom_text_field);
gui_push_string(target, h, prompt);
gui_push_string(target, h, text);
}
internal b32
gui_do_text_with_cursor(GUI_Target *target, i32 pos, String text, GUI_Item_Update *update){
b32 result = 0;
GUI_Header *h = gui_push_simple_command(target, guicom_text_with_cursor);
gui_push_string(target, h, text);
gui_push_item(target, h, &pos, sizeof(i32));
result = target->has_keys;
if (result){
gui_fill_update(update, target, h);
target->animating = 1;
}
return(result);
}
internal b32
gui_do_color_button(GUI_Target *target, GUI_id id, u32 fore, u32 back, String text){
b32 result = 0;
GUI_Interactive *b = gui_push_button_command(target, guicom_color_button, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_item(target, h, &fore, sizeof(fore));
gui_push_item(target, h, &back, sizeof(back));
gui_push_string(target, h, text);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal b32
gui_do_font_button(GUI_Target *target, GUI_id id, Font_ID font_id, String text){
b32 result = 0;
i32 font_id32 = font_id;
GUI_Interactive *b = gui_push_button_command(target, guicom_font_button, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_item(target, h, &font_id32, sizeof(font_id32));
gui_push_string(target, h, text);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal b32
gui_begin_list(GUI_Target *target, GUI_id id, i32 list_i,
b32 activate_item, b32 snap_into_view, GUI_Item_Update *update){
b32 result = 0;
b32 active = 0;
i32 list_min = 0;
i32 list_max = target->list_max;
GUI_Interactive *b = gui_push_button_command(target, guicom_begin_list, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_item(target, h, &list_i, sizeof(list_i));
gui_push_item(target, h, &activate_item, sizeof(activate_item));
result = target->has_keys || target->has_list_index_position;
if (gui_id_eq(id, target->active)){
active = 1;
result = 1;
}
if (snap_into_view){
if (target->list_view_min > list_min){
list_min = target->list_view_min;
}
if (target->list_view_max < list_max){
list_max = target->list_view_max;
}
}
if (list_max > 0){
if (list_i < list_min || list_i >= list_max){
result = 1;
}
}
if (result){
gui_fill_update(update, target, h);
if (list_i < list_min){
gui_update_adjustment(update, list_min);
}
else if (list_i >= list_max){
if (list_max > 0){
gui_update_adjustment(update, list_max - 1);
}
else{
gui_update_adjustment(update, 0);
}
}
if (target->has_list_index_position){
gui_update_position(update, target->list_index_position);
}
target->animating = 1;
}
return(result);
}
internal void
gui_end_list(GUI_Target *target){
gui_push_simple_command(target, guicom_end_list);
}
internal b32
gui_do_file_option(GUI_Target *target, GUI_id id, String filename,
b32 is_folder, String message){
b32 result = 0;
GUI_Interactive *b = gui_push_button_command(target, guicom_file_option, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_item(target, h, &is_folder, sizeof(is_folder));
gui_push_string(target, h, filename, 1);
gui_push_string(target, h, message);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal b32
gui_do_button(GUI_Target *target, GUI_id id, String message){
b32 result = 0;
GUI_Interactive *b = gui_push_button_command(target, guicom_button, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_string(target, h, message);
gui_align(target, h);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal b32
gui_do_fixed_option(GUI_Target *target, GUI_id id, String message, char key){
b32 result = 0;
GUI_Interactive *b = gui_push_button_command(target, guicom_fixed_option, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_string(target, h, message);
gui_push_item(target, h, &key, 1);
gui_align(target, h);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal b32
gui_do_fixed_option_checkbox(GUI_Target *target, GUI_id id, String message, char key, b8 state){
b32 result = 0;
GUI_Interactive *b = gui_push_button_command(target, guicom_fixed_option_checkbox, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_string(target, h, message);
gui_push_item(target, h, &key, 1);
gui_push_item(target, h, &state, 1);
gui_align(target, h);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal b32
gui_do_style_preview(GUI_Target *target, GUI_id id, i32 style_index){
b32 result = 0;
GUI_Interactive *b = gui_push_button_command(target, guicom_style_preview, id);
GUI_Header *h = (GUI_Header*)b;
gui_push_item(target, h, &style_index, sizeof(style_index));
gui_align(target, h);
if (gui_id_eq(id, target->active)){
result = 1;
target->animating = 1;
}
return(result);
}
internal GUI_id
gui_id_scrollbar(){
GUI_id id;
id.id[0] = 0;
id.id[1] = max_u64;
return(id);
}
internal GUI_id
gui_id_scrollbar_top(){
GUI_id id;
id.id[0] = 1;
id.id[1] = max_u64;
return(id);
}
internal GUI_id
gui_id_scrollbar_slider(){
GUI_id id;
id.id[0] = 2;
id.id[1] = max_u64;
return(id);
}
internal GUI_id
gui_id_scrollbar_bottom(){
GUI_id id;
id.id[0] = 3;
id.id[1] = max_u64;
return(id);
}
internal b32
gui_scroll_eq(GUI_Scroll_Vars *a, GUI_Scroll_Vars *b){
b32 result = (memcmp(a, b, sizeof(*a)) == 0);
return(result);
}
#if 0
// TODO(allen): Rethink this a little, seems like there are two separate things we want to do here:
// Getting the updated scroll vars, and telling the user when scrolling actions occur.
internal b32
gui_get_scroll_vars(GUI_Target *target, GUI_id scroll_context_id, i32_Rect *region_out){
b32 result = 0;
if (gui_id_eq(scroll_context_id, target->scroll_id)){
*region_out = target->region_updated;
if (gui_id_eq(target->active, gui_id_scrollbar())){
result = 1;
target->animating = 1;
}
}
return(result);
}
#endif
internal b32
gui_scroll_was_activated(GUI_Target *target, GUI_id scroll_context_id){
b32 result = false;
if (gui_id_eq(scroll_context_id, target->scroll_id)){
if (gui_id_eq(target->active, gui_id_scrollbar())){
result = true;
target->animating = true;
}
}
return(result);
}
internal void
gui_post_scroll_vars(GUI_Target *target, GUI_Scroll_Vars *vars_in, i32_Rect region_in){
if (!rect_equal(region_in, target->region_updated)){
target->region_updated = region_in;
target->animating = 1;
target->active = gui_id_scrollbar();
}
}
internal void
gui_begin_scrollable(GUI_Target *target, GUI_id scroll_context_id,
GUI_Scroll_Vars scroll_vars, i32 delta, b32 show_bar){
GUI_Header *h;
gui_begin_serial_section(target);
target->delta = delta;
h = gui_push_simple_command(target, guicom_scrollable);
target->scroll_original = scroll_vars;
target->scroll_id = scroll_context_id;
if (show_bar){
gui_push_simple_command(target, guicom_scrollable_bar);
gui_push_simple_command(target, guicom_scrollable_top);
gui_push_simple_command(target, guicom_scrollable_slider);
gui_push_simple_command(target, guicom_scrollable_bottom);
}
else{
gui_push_simple_command(target, guicom_scrollable_invisible);
}
gui_push_simple_command(target, guicom_begin_scrollable_section);
}
internal void
gui_end_scrollable(GUI_Target *target){
gui_push_simple_command(target, guicom_end_scrollable_section);
gui_end_serial_section(target);
}
internal void
gui_activate_scrolling(GUI_Target *target){
target->active = gui_id_scrollbar();
}
struct GUI_Section{
i32 max_v, v, top_v;
};
struct GUI_List_Vars{
b32 in_list;
i32 index;
i32 auto_hot;
i32 auto_activate;
};
struct GUI_Session{
i32_Rect full_rect;
i32_Rect rect;
i32 suggested_max_y;
i32 clip_y;
i32 line_height;
b32 is_scrollable;
i32 scrollable_items_bottom;
i32_Rect scroll_region;
i32_Rect scroll_rect;
f32 scroll_top, scroll_bottom;
GUI_List_Vars list;
GUI_Section sections[64];
i32 t;
};
#define GUIScrollbarWidth 16
// TODO(allen): We can probably totally get rid of this now.
internal i32
gui_session_get_eclipsed_y(GUI_Session *session){
i32 count = session->t + 1;
i32 max_v = session->sections[count-1].top_v;
return(max_v);
}
internal i32
gui_session_get_current_top(GUI_Session *session){
i32 result = session->sections[session->t].top_v;
return(result);
}
inline GUI_Session
gui_session_zero(){
GUI_Session session={0};
return(session);
}
internal void
gui_session_init(GUI_Session *session, GUI_Target *target,
i32_Rect full_rect, i32 line_height){
GUI_Section *section;
*session = gui_session_zero();
session->full_rect = full_rect;
session->line_height = line_height;
section = &session->sections[0];
section->v = full_rect.y0;
section->max_v = full_rect.y0;
target->list_view_min = max_i32;
target->list_view_max = min_i32;
}
internal void
gui_section_end_item(GUI_Section *section, i32 v){
section->v = v;
if (section->max_v < v){
section->max_v = v;
}
}
inline i32_Rect
gui_layout_top_bottom(GUI_Session *session, i32 y0, i32 y1){
i32_Rect rect = {0};
rect.y0 = y0;
rect.y1 = y1;
rect.x0 = session->full_rect.x0;
rect.x1 = session->full_rect.x1;
if (session->is_scrollable){
rect.x0 = session->scroll_region.x0;
rect.x1 = session->scroll_region.x1;
}
return(rect);
}
inline i32_Rect
gui_layout_fixed_h(GUI_Session *session, i32 y, i32 h){
i32_Rect rect;
rect = gui_layout_top_bottom(session, y, y + h);
return(rect);
}
internal void
gui_scrollbar_top(i32_Rect bar, i32_Rect *top){
i32 w = (bar.x1 - bar.x0);
top->x0 = bar.x0;
top->x1 = bar.x1;
top->y0 = bar.y0;
top->y1 = top->y0 + w;
}
internal void
gui_scrollbar_slider(i32_Rect bar, i32_Rect *slider, f32 s, f32 *min_out, f32 *max_out, i32 target_min, i32 target_max){
i32 h = 0, w = (bar.x1 - bar.x0);
i32 min = 0, max = 0, pos = 0;
f32 screen_size = (f32)(bar.y1 - bar.y0);
f32 full_size = (f32)(target_max - target_min + screen_size);
f32 ratio = 1.f;
if (full_size > screen_size){
ratio = screen_size/full_size;
}
h = (i32)(ratio * bar.y1 - bar.y0 - w*2);
if (h < w){
h = w;
}
slider->x0 = bar.x0;
slider->x1 = bar.x1;
min = bar.y0 + w + h/2;
max = bar.y1 - w - h/2;
pos = lerp(min, s, max);
slider->y0 = pos - h/2;
slider->y1 = slider->y0 + h;
*min_out = (f32)min;
*max_out = (f32)max;
}
internal void
gui_scrollbar_bottom(i32_Rect bar, i32_Rect *bottom){
i32 w = (bar.x1 - bar.x0);
bottom->x0 = bar.x0;
bottom->x1 = bar.x1;
bottom->y1 = bar.y1;
bottom->y0 = bottom->y1 - w;
}
#define NextHeader(h) ((GUI_Header*)((char*)(h) + (h)->size))
internal i8
gui_read_byte(void **ptr){
i8 result;
result = *(i8*)*ptr;
*ptr = ((char*)*ptr) + 1;
return(result);
}
internal i32
gui_read_integer(void **ptr){
i32 result;
result = *(i32*)*ptr;
*ptr = ((char*)*ptr) + 4;
return(result);
}
internal f32
gui_read_float(void **ptr){
f32 result;
result = *(f32*)*ptr;
*ptr = ((char*)*ptr) + 4;
return(result);
}
internal String
gui_read_string(void **ptr){
String result;
result.size = *(i32*)*ptr;
*ptr = ((i32*)*ptr) + 1;
result.memory_size = *(i32*)*ptr;
*ptr = ((i32*)*ptr) + 1;
result.str = (char*)*ptr;
*ptr = result.str + result.memory_size;
return(result);
}
internal void*
gui_read_out(void **ptr){
void *result;
result = *(void**)*ptr;
*ptr = ((void**)ptr) + 1;
return(result);
}
struct GUI_Interpret_Result{
b32 has_info;
b32 auto_hot;
b32 auto_activate;
i32 screen_orientation;
b32 has_region;
i32_Rect region;
};
internal GUI_Interpret_Result
gui_interpret(GUI_Target *target, GUI_Session *session, GUI_Header *h,
GUI_Scroll_Vars vars, i32_Rect region, i32 max_y){
GUI_Interpret_Result result = {0};
GUI_Section *section = 0;
GUI_Section *new_section = 0;
GUI_Section *prev_section = 0;
GUI_Section *end_section = 0;
b32 give_to_user = 0;
b32 always_give_to_user = 0;
b32 do_layout = 1;
b32 is_list_item = 0;
i32_Rect rect = {0};
i32 y = 0;
i32 end_v = -1;
f32 lerp_space_scroll_v = 0;
i32 scroll_v = (i32)target->scroll_original.scroll_y;
i32 target_v = (i32)vars.target_y;
Assert(session->t < ArrayCount(session->sections));
section = session->sections + session->t;
y = section->v;
if (!session->is_scrollable) scroll_v = 0;
switch (h->type){
case guicom_null: Assert(0); break;
case guicom_begin_serial:
++session->t;
Assert(session->t < ArrayCount(session->sections));
new_section = &session->sections[session->t];
new_section->v = y;
new_section->max_v = y;
new_section->top_v = y;
break;
case guicom_end_serial:
Assert(session->t > 0);
prev_section = &session->sections[--session->t];
end_v = section->max_v;
end_section = prev_section;
break;
case guicom_top_bar:
give_to_user = 1;
rect = gui_layout_fixed_h(session, y, session->line_height + 2);
end_v = rect.y1;
end_section = section;
break;
case guicom_file:
give_to_user = 1;
rect = gui_layout_top_bottom(session, y, session->full_rect.y1);
end_v = rect.y1;
end_section = section;
scroll_v = 0;
break;
case guicom_text_with_cursor:
case guicom_text_field:
give_to_user = 1;
rect = gui_layout_fixed_h(session, y, session->line_height + 2);
end_v = rect.y1;
end_section = section;
break;
case guicom_color_button:
case guicom_font_button:
give_to_user = 1;
rect = gui_layout_fixed_h(session, y, session->line_height + 2);
end_v = rect.y1;
end_section = section;
break;
case guicom_begin_list:
{
GUI_Interactive *b = (GUI_Interactive*)h;
void *ptr = (b + 1);
i32 index = gui_read_integer(&ptr);
b32 activate = (b32)gui_read_integer(&ptr);
Assert(session->list.in_list == 0);
session->list.in_list = 1;
session->list.index = 0;
session->list.auto_hot = index;
session->list.auto_activate = -1;
if (activate){
session->list.auto_activate = index;
}
}break;
case guicom_end_list:
Assert(session->list.in_list == 1);
session->list.in_list = 0;
target->list_max = session->list.index;
break;
case guicom_file_option:
case guicom_fixed_option:
case guicom_fixed_option_checkbox:
{
give_to_user = 1;
rect = gui_layout_fixed_h(session, y, session->line_height * 2);
end_v = rect.y1;
end_section = section;
is_list_item = 1;
if (session->list.in_list){
if (session->list.auto_hot == session->list.index){
result.auto_hot = 1;
if (!rect_equal(target->list_index_position, rect)){
target->has_list_index_position = 1;
target->list_index_position = rect;
}
}
if (session->list.auto_activate == session->list.index){
result.auto_activate = 1;
}
++session->list.index;
}
}break;
case guicom_button:
give_to_user = 1;
rect = gui_layout_fixed_h(session, y, session->line_height * 2);
end_v = rect.y1;
end_section = section;
break;
case guicom_style_preview:
give_to_user = 1;
rect = gui_layout_fixed_h(session, y, session->line_height * 3 + 6);
end_v = rect.y1;
end_section = section;
break;
case guicom_scrollable:
Assert(session->is_scrollable == 0);
session->is_scrollable = 1;
always_give_to_user = 1;
{
i32_Rect scrollable_rect = {0};
scrollable_rect.x0 = session->full_rect.x0;
scrollable_rect.x1 = session->full_rect.x1;
scrollable_rect.y0 = y;
scrollable_rect.y1 = session->full_rect.y1;
result.has_region = 1;
result.region = scrollable_rect;
session->scroll_region = scrollable_rect;
}
break;
case guicom_scrollable_bar:
Assert(session->is_scrollable);
give_to_user = 1;
rect.x1 = session->full_rect.x1;
rect.x0 = rect.x1 - GUIScrollbarWidth;
rect.y0 = y;
rect.y1 = session->full_rect.y1;
session->scroll_rect = rect;
{
i32_Rect scrollable_rect = {0};
scrollable_rect.x0 = session->full_rect.x0;
scrollable_rect.x1 = rect.x0;
scrollable_rect.y0 = y;
scrollable_rect.y1 = session->full_rect.y1;
result.has_region = 1;
result.region = scrollable_rect;
session->scroll_region = scrollable_rect;
}
scroll_v = 0;
break;
case guicom_scrollable_top:
Assert(session->is_scrollable);
give_to_user = 1;
gui_scrollbar_top(session->scroll_rect, &rect);
scroll_v = 0;
break;
case guicom_scrollable_slider:
Assert(session->is_scrollable);
give_to_user = 1;
lerp_space_scroll_v =
unlerp(0,
(f32)target->scroll_original.target_y,
(f32)max_y);
gui_scrollbar_slider(session->scroll_rect, &rect, lerp_space_scroll_v,
&session->scroll_top, &session->scroll_bottom,
0, max_y);
scroll_v = 0;
break;
case guicom_scrollable_invisible:
Assert(session->is_scrollable);
always_give_to_user = 1;
break;
case guicom_scrollable_bottom:
Assert(session->is_scrollable);
give_to_user = 1;
gui_scrollbar_bottom(session->scroll_rect, &rect);
scroll_v = 0;
break;
case guicom_begin_scrollable_section:
always_give_to_user = 1;
session->scrollable_items_bottom = 0;
rect = gui_layout_top_bottom(session, y, session->full_rect.y1);
end_v = rect.y1;
break;
case guicom_end_scrollable_section:
always_give_to_user = 1;
session->suggested_max_y = ceil32(session->scrollable_items_bottom - (session->full_rect.y0 + session->full_rect.y1)*.5f);
if (session->suggested_max_y < 0){
session->suggested_max_y = 0;
}
break;
}
if (do_layout){
if (session->list.in_list && is_list_item){
i32 list_i = session->list.index - 1;
if (rect.y0 - target_v >= region.y0 &&
rect.y1 - target_v <= region.y1){
if (list_i < target->list_view_min){
target->list_view_min = list_i;
}
if (list_i+1 > target->list_view_max){
target->list_view_max = list_i+1;
}
}
}
if (give_to_user){
if (session->is_scrollable){
session->scrollable_items_bottom =
Max(session->scrollable_items_bottom, rect.y1);
}
rect.y0 -= scroll_v;
rect.y1 -= scroll_v;
if (rect.y1 > session->full_rect.y0){
session->rect = rect;
}
else{
give_to_user = 0;
result.screen_orientation = -1;
}
}
if (end_section){
gui_section_end_item(end_section, end_v);
}
// TODO(allen): Why is this here, is there a particular reason?
if (y - scroll_v >= session->full_rect.y1){
give_to_user = 0;
result.screen_orientation = 1;
}
}
session->clip_y = gui_session_get_eclipsed_y(session);
result.has_info = (give_to_user || always_give_to_user);
return(result);
}
struct GUI_View_Jump{
i32 view_min;
i32 view_max;
};
internal GUI_View_Jump
gui_compute_view_jump(i32_Rect scroll_region, i32_Rect position){
GUI_View_Jump jump = {0};
i32 region_h = scroll_region.y1 - scroll_region.y0;
jump.view_min = position.y1 - scroll_region.y0 - region_h;
jump.view_max = position.y0 - scroll_region.y0;
return(jump);
}
internal GUI_Scroll_Vars
gui_do_jump(GUI_Target *target, GUI_View_Jump jump, GUI_Scroll_Vars vars){
if (jump.view_max < 0){
jump.view_max = 0;
}
if (jump.view_min < 0){
jump.view_min = 0;
}
if (vars.target_y < jump.view_min){
vars.target_y = jump.view_min;
}
else if (vars.target_y > jump.view_max){
vars.target_y = jump.view_max;
}
return(vars);
}
internal void
gui_standard_list(GUI_Target *target, GUI_id id, GUI_Scroll_Vars *vars, i32_Rect scroll_region, Key_Input_Data *keys, i32 *list_i, GUI_Item_Update *update, Key_Code user_up_key, Key_Modifier user_up_key_modifier, Key_Code user_down_key, Key_Modifier user_down_key_modifier){
if (update->has_adjustment){
*list_i = update->adjustment_value;
}
if (update->has_index_position){
GUI_View_Jump jump = gui_compute_view_jump(scroll_region, update->index_position);
jump.view_min = jump.view_min + 45;
jump.view_max = jump.view_max - 45;
*vars = gui_do_jump(target, jump, *vars);
}
i8 modifiers_up[3];
modifiers_up[0] = ((user_up_key_modifier & MDFR_CTRL) != 0);
modifiers_up[1] = ((user_up_key_modifier & MDFR_ALT) != 0);
modifiers_up[2] = ((user_up_key_modifier & MDFR_SHIFT) != 0);
i8 modifiers_down[3];
modifiers_down[0] = ((user_down_key_modifier & MDFR_CTRL) != 0);
modifiers_down[1] = ((user_down_key_modifier & MDFR_ALT) != 0);
modifiers_down[2] = ((user_down_key_modifier & MDFR_SHIFT) != 0);
b32 indirectly_activate = 0;
for (i32 j = 0; j < keys->count; ++j){
Key_Event_Data key = keys->keys[j];
b32 modifiers_match_up = false;
b32 modifiers_match_down = false;
if (modifiers_up[0] == key.modifiers[MDFR_CONTROL_INDEX] && modifiers_up[1] == key.modifiers[MDFR_ALT_INDEX] && modifiers_up[2] == key.modifiers[MDFR_SHIFT_INDEX]){
modifiers_match_up = true;
}
if (modifiers_down[0] == key.modifiers[MDFR_CONTROL_INDEX] && modifiers_down[1] == key.modifiers[MDFR_ALT_INDEX] && modifiers_down[2] == key.modifiers[MDFR_SHIFT_INDEX]){
modifiers_match_down = true;
}
if (key.keycode == user_up_key && modifiers_match_up){
--*list_i;
}
else if (key.keycode == user_down_key && modifiers_match_down){
++*list_i;
}
else if (key.keycode == '\n' || key.keycode == '\t'){
indirectly_activate = 1;
}
}
gui_rollback(target, update);
gui_begin_list(target, id, *list_i, indirectly_activate, 0, 0);
}
// BOTTOM
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