Synthasmagoria/transformation_visualizer
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Prepping to add matrices part 2

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Synthasmagoria 2026-08-02 13:06:41 +02:00
commit 9154823436
2 changed files with 103 additions and 80 deletions
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48
libraries/snths_ui/ui.odin
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@ -16,6 +16,8 @@ rect_grow :: #force_inline proc(rect: rect2, amount: v2) -> rect2 {return {rect.
ctx: ^Context
MeasureTextProc :: proc(text: cstring, data: rawptr) -> v2
Context :: struct {
origin: v2,
container_count: u16,
@ -23,6 +25,8 @@ Context :: struct {
container_last_element: [dynamic]int,
elements: [dynamic]Element,
same_line: bool,
measure_text_callback: MeasureTextProc,
measure_text_callback_data: rawptr,
}
CONTAINER_STACK_SIZE :: 16
@ -57,6 +61,7 @@ ElementType :: enum {
Slider,
InputFloat,
Dropdown,
Label,
Custom0,
Custom1,
Custom2,
@ -89,10 +94,12 @@ 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)
init :: proc(ctx: ^Context, element_capacity: int, measure_text_callback: MeasureTextProc, measure_text_callback_data: rawptr, allocator := context.allocator) {
ctx.containers = make(type_of(ctx.containers), 0, CONTAINER_STACK_SIZE, allocator)
ctx.container_last_element = make(type_of(ctx.container_last_element), 0, CONTAINER_STACK_SIZE, allocator)
ctx.elements = make(type_of(ctx.elements), 0, element_capacity, allocator)
ctx.measure_text_callback = measure_text_callback
ctx.measure_text_callback_data = measure_text_callback_data
}
start :: proc(ui_context: ^Context, origin: v2, size: v2) {
@ -134,13 +141,14 @@ focus_next_element :: proc(id: ElementId, elements: []Element, allowed_focus: bi
}
container_begin :: proc(dimensions: Dimensions, config: ElementConfiguration, data: rawptr = nil) -> ^Element {
area := _resolve_element_area(dimensions, config.margin)
element := Element{config = config, type = .Container, dimensions = dimensions, data = data}
element.area = _resolve_element_area(element, is_text = false)
ctx.container_count += 1
element := _append_element({area = area, config = config, type = .Container, dimensions = dimensions, data = data})
element_ref := _append_element(element)
container_index := len(ctx.elements) - 1
append(&ctx.containers, container_index)
append(&ctx.container_last_element, -1)
return element
return element_ref
}
container_end :: proc() {
@ -166,8 +174,7 @@ container_end :: proc() {
ctx.same_line = false
}
element :: proc(element_type: ElementType, dimensions: Dimensions, config: ElementConfiguration, data: rawptr = nil) -> ^Element {
assert(element_type != .Container)
assert_auto_with_pixels :: proc(dimensions: Dimensions) {
container := _container_current()
if _, is_auto := container.dimensions.width.(Size_Auto); is_auto {
_, is_pixels := dimensions.width.(Size_Pixels)
@ -177,9 +184,14 @@ element :: proc(element_type: ElementType, dimensions: Dimensions, config: Eleme
_, is_pixels := dimensions.height.(Size_Pixels)
assert(is_pixels, "Any height that is not Size_Pixels is disallowed in a container using Size_Auto for height")
}
}
area := _resolve_element_area(dimensions, config.margin)
return _append_element({area = area, config = config, type = element_type, dimensions = dimensions, data = data})
element :: proc(element_type: ElementType, dimensions: Dimensions, config: ElementConfiguration, data: rawptr = nil) -> ^Element {
assert(element_type != .Container)
assert_auto_with_pixels(dimensions)
element := Element{config = config, type = element_type, dimensions = dimensions, data = data}
element.area = _resolve_element_area(element, is_text = (element.type == .Label))
return _append_element(element)
}
get_element_outer_area :: proc(element: Element) -> rect2 {
@ -199,10 +211,14 @@ _append_element :: proc(element: Element) -> ^Element {
return element
}
_resolve_element_area :: proc(dimensions: Dimensions, margin: v2) -> rect2 {
_resolve_element_area :: proc(element: Element, is_text: bool) -> rect2 {
outer_position := _resolve_element_outer_position()
outer_size := _resolve_element_outer_size(dimensions)
return rect_grow(rect2{**outer_position, **outer_size}, -margin * 2.0)
if !is_text {
outer_size := _resolve_element_outer_size(element.dimensions)
return rect_grow(rect2{**outer_position, **outer_size}, -element.margin * 2.0)
}
inner_position := ctx.measure_text_callback(element.label, ctx.measure_text_callback_data)
return {**(outer_position + element.margin), **(inner_position + element.margin)}
}
_resolve_element_outer_position :: proc() -> v2 {
@ -221,10 +237,10 @@ _resolve_element_outer_position :: proc() -> v2 {
}
_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)}
return {_resolve_element_outer_size_axis(dimensions.width, .X), _resolve_element_outer_size_axis(dimensions.height, .Y)}
}
_resolve_elemment_outer_size_axis :: proc(size: Size, axis: Axis) -> f32 {
_resolve_element_outer_size_axis :: proc(size: Size, axis: Axis) -> f32 {
switch value in size {
case Size_Pixels:
return f32(value)