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imgui - part 3 (ids)

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Synthasmagoria 2026-07-21 21:35:41 +02:00
commit d329a7f381
2 changed files with 46 additions and 10 deletions
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36
ui.odin
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@ -19,13 +19,21 @@ UiElementData :: union {
UiElement :: struct {
area: rect2,
type: UiElementType,
id: UiElementId,
data: UiElementData,
}
UiElementId :: bit_field u32 {
group_index: u16 | 16,
element_index: u16 | 16,
}
UiState :: struct {
origin, position_left, position: v2,
same_line: bool,
style: UiStyle,
element_focus_id: UiElementId,
id_current: UiElementId,
elements: [dynamic]UiElement,
container: ^UiElement,
group_element_count: int,
@ -35,8 +43,13 @@ UiStyle :: struct {
margin, padding: f32,
}
ui_id_invalid :: proc() -> UiElementId {
return {group_index = max(u16), element_index = max(u16)}
}
ui_start :: proc(state: ^UiState) {
clear(&state.elements)
state.id_current = {group_index = 0, element_index = 0}
state.position_left = state.origin
state.position = state.position_left
}
@ -51,7 +64,8 @@ UiElementData_Button :: struct {
ui_button :: proc(state: ^UiState, size: v2, data: UiElementData_Button) {
area := _ui_advance_element(state, size)
append(&state.elements, UiElement{area = area, type = .Button, data = data})
state.id_current.element_index += 1
append(&state.elements, UiElement{id = state.id_current, area = area, type = .Button, data = data})
}
UiElementData_Container :: struct {
@ -60,7 +74,9 @@ UiElementData_Container :: struct {
ui_container_begin :: proc(state: ^UiState, data: UiElementData_Container) {
assert(state.container == nil)
append(&state.elements, UiElement{area = _ui_advance_container(state), type = .Container, data = data})
state.id_current = {group_index = state.id_current.group_index + 1, element_index = 0}
element := UiElement{id = state.id_current, area = _ui_advance_container(state), type = .Container, data = data}
append(&state.elements, element)
state.position_left += state.style.margin + state.style.padding
state.container = &state.elements[len(state.elements) - 1]
}
@ -82,7 +98,8 @@ UiElementData_Input :: struct {
ui_input :: proc(state: ^UiState, size: v2, data: UiElementData_Input) {
area := _ui_advance_element(state, size)
append(&state.elements, UiElement{area = area, type = .Input, data = data})
state.id_current.element_index += 1
append(&state.elements, UiElement{id = state.id_current, area = area, type = .Input, data = data})
}
ui_same_line :: proc(state: ^UiState) {
@ -91,6 +108,7 @@ ui_same_line :: proc(state: ^UiState) {
ui_init :: proc(state: ^UiState, style: UiStyle, origin: v2, allocator: mem.Allocator) {
state^ = {
element_focus_id = ui_id_invalid(),
origin = origin,
position = origin,
style = style,
@ -98,6 +116,18 @@ ui_init :: proc(state: ^UiState, style: UiStyle, origin: v2, allocator: mem.Allo
}
}
ui_element_is_editing :: proc(state: UiState, id: UiElementId) -> bool {
return state.element_focus_id == id
}
ui_element_focus :: proc(state: ^UiState, id: UiElementId) {
state.element_focus_id = id
}
ui_element_focus_reset :: proc(state: ^UiState) {
state.element_focus_id = ui_id_invalid()
}
_ui_advance_element :: proc(state: ^UiState, size: v2) -> rect2 {
if state.group_element_count > 0 {
if state.same_line {