Synthasmagoria/snths_ui
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Element size resolver

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Synthasmagoria 2026-07-28 14:25:18 +02:00
commit 12320fbefa
2 changed files with 49 additions and 43 deletions
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91
ui.odin
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@ -3,16 +3,16 @@ package synthas_ui
v2 :: [2]f32
rect2 :: struct {x, y, width, height: f32}
@private rect_get_tl :: #force_inline proc(rect: rect2) -> v2 {return {rect.x, rect.y}}
@private rect_get_tr :: #force_inline proc(rect: rect2) -> v2 {return {rect.x + rect.width, rect.y}}
@private rect_get_br :: #force_inline proc(rect: rect2) -> v2 {return {rect.x + rect.width, rect.y + rect.height}}
@private rect_get_bl :: #force_inline proc(rect: rect2) -> v2 {return {rect.x, rect.y + rect.height}}
rect_get_tl :: #force_inline proc(rect: rect2) -> v2 {return {rect.x, rect.y}}
rect_get_tr :: #force_inline proc(rect: rect2) -> v2 {return {rect.x + rect.width, rect.y}}
rect_get_br :: #force_inline proc(rect: rect2) -> v2 {return {rect.x + rect.width, rect.y + rect.height}}
rect_get_bl :: #force_inline proc(rect: rect2) -> v2 {return {rect.x, rect.y + rect.height}}
@private rect_grow :: proc(rect: rect2, amount: v2) -> rect2 {
rect_grow :: proc(rect: rect2, amount: v2) -> rect2 {
return {rect.x - amount.x / 2.0, rect.y - amount.y / 2.0, rect.width + amount.x, rect.height + amount.y}
}
@private ctx: ^Context
ctx: ^Context
Context :: struct {
origin: v2,
@ -22,13 +22,7 @@ Context :: struct {
same_line: bool,
}
@private CONTAINER_STACK_SIZE :: 16
init :: proc(state: ^Context, element_capacity: int, allocator := context.allocator) {
state.containers = make(type_of(state.containers), 0, CONTAINER_STACK_SIZE, allocator)
state.container_last_element = make(type_of(state.container_last_element), 0, CONTAINER_STACK_SIZE, allocator)
state.elements = make(type_of(state.elements), 0, element_capacity, allocator)
}
CONTAINER_STACK_SIZE :: 16
Element :: struct {
area: rect2,
@ -63,6 +57,12 @@ Dimensions :: struct {
Axis :: enum {X, Y}
init :: proc(state: ^Context, element_capacity: int, allocator := context.allocator) {
state.containers = make(type_of(state.containers), 0, CONTAINER_STACK_SIZE, allocator)
state.container_last_element = make(type_of(state.container_last_element), 0, CONTAINER_STACK_SIZE, allocator)
state.elements = make(type_of(state.elements), 0, element_capacity, allocator)
}
start :: proc(ui_context: ^Context, origin: v2, size: v2) {
ctx = ui_context
ctx.origin = origin
@ -92,59 +92,64 @@ same_line :: proc() {
ctx.same_line = true
}
element_get_outer_area :: proc(element: Element) -> rect2 {
return rect_grow(element.area, element.margin * 2.0)
}
element_get_inner_area :: proc(element: Element) -> rect2 {
return rect_grow(element.area, -element.padding * 2.0)
}
container_begin :: proc(dimensions: Dimensions, config: ElementConfiguration) {
position: v2
if len(ctx.containers) == 0 {
position = ctx.origin + config.margin
} else {
if alignment_element := _element_container_previous(); alignment_element != nil {
position = rect_get_tl(element_get_inner_area(alignment_element^)) + config.margin
} else {
position = rect_get_tl(element_get_inner_area(_element_previous()^)) + config.margin
}
}
size := _resolve_dimensions(dimensions) - config.margin * 2.0
element := Element{area = rect2{**position, **size}, config = config, type = .Container}
area := _resolve_element_area(dimensions, config.margin)
element := Element{area = area, config = config, type = .Container}
_append_element(element)
container_index := len(ctx.elements) - 1
append(&ctx.containers, container_index)
append(&ctx.container_last_element, -1)
}
@private _append_element :: proc(element: Element) {
append(&ctx.elements, element)
ctx.container_last_element[len(ctx.containers) - 1] = len(ctx.elements) - 1
}
container_end :: proc() {
container := ctx.elements[pop(&ctx.containers)]
pop(&ctx.container_last_element)
// TODO: Set flex
outer := element_get_outer_area(container)
outer := _get_element_outer_area(container)
}
button :: proc(dimensions: Dimensions) {
}
_resolve_dimensions :: proc(dimensions: Dimensions) -> v2 {
return {_resolve_size(dimensions.width, .X), _resolve_size(dimensions.height, .Y)}
_append_element :: proc(element: Element) {
append(&ctx.elements, element)
ctx.container_last_element[len(ctx.containers) - 1] = len(ctx.elements) - 1
}
_resolve_size :: proc(size: Size, axis: Axis) -> f32 {
_get_element_outer_area :: proc(element: Element) -> rect2 {
return rect_grow(element.area, element.margin * 2.0)
}
_get_element_inner_area :: proc(element: Element) -> rect2 {
return rect_grow(element.area, -element.padding * 2.0)
}
_resolve_element_area :: proc(dimensions: Dimensions, margin: v2) -> rect2 {
outer_position := _resolve_element_outer_position()
outer_size := _resolve_element_outer_size(dimensions)
outer_area := rect2{**outer_position, **outer_size}
return rect_grow(outer_area, -margin * 2.0)
}
_resolve_element_outer_position :: proc() -> v2 {
if alignment_element := _element_container_previous(); alignment_element != nil {
return rect_get_bl(_get_element_inner_area(alignment_element^))
}
return rect_get_tl(_get_element_inner_area(_element_previous()^))
}
_resolve_element_outer_size :: proc(dimensions: Dimensions) -> v2 {
return {_resolve_elemment_outer_size_axis(dimensions.width, .X), _resolve_elemment_outer_size_axis(dimensions.height, .Y)}
}
_resolve_elemment_outer_size_axis :: proc(size: Size, axis: Axis) -> f32 {
switch value in size {
case Size_Pixels:
return cast(f32)value
case Size_Percentage:
if container := _container_current(); container != nil {
inner := element_get_inner_area(container^)
inner := _get_element_inner_area(container^)
container_size := inner.width if axis == .X else inner.height
return container_size * cast(f32)value
} else {