99 lines
2.4 KiB
Odin
99 lines
2.4 KiB
Odin
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package main
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import rl "vendor:raylib"
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import "core:math/ease"
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import "core:fmt"
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MenuList :: struct($T: typeid) {
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state: ^GameState,
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position: vec2,
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line_size: f32,
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font_size: f32,
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active_element: T,
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active_marker: vec2,
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tween: ^Tween,
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elements: ^[T]cstring,
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menu_pressed: proc(state: ^GameState, element: T),
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background: rl.Color,
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mouse_pos: vec2,
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}
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menu_list_update :: proc(list: ^MenuList($T)) {
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activate_element := false
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prev_element := cast(i8)list.active_element
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cur_element := prev_element
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last_mouse_pos := list.mouse_pos
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list.mouse_pos = rl.GetMousePosition()
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size := menu_list_get_size(list)
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if rl.CheckCollisionPointRec(list.mouse_pos, rl.Rectangle{
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x = list.position.x,
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y = list.position.y,
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width = size.x,
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height = size.y,
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}) {
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if last_mouse_pos != list.mouse_pos {
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mouse_relative := list.mouse_pos - list.position
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cur_element = i8(mouse_relative.y / list.line_size)
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}
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if rl.IsMouseButtonPressed(rl.MouseButton.LEFT) {
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list.menu_pressed(list.state, list.active_element)
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}
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}
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last_mouse_pos = list.mouse_pos
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if rl.IsKeyPressed(rl.KeyboardKey.DOWN) {
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cur_element += 1
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}
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if rl.IsKeyPressed(rl.KeyboardKey.UP) {
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cur_element -= 1
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}
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if prev_element != cur_element {
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if cur_element < 0 { cur_element = len(T) -1 }
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if cur_element == len(T) { cur_element = 0 }
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list.active_element = cast(T)cur_element
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if list.tween != nil {
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tween_cancel(list.tween)
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}
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list.tween = tween_to(
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&list.active_marker.y,
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f32(list.active_element) * list.line_size,
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0.25,
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ease.Ease.Quadratic_Out,
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)
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}
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if rl.IsKeyPressed(rl.KeyboardKey.ENTER) || rl.IsKeyPressed(rl.KeyboardKey.SPACE) {
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list.menu_pressed(list.state, list.active_element)
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}
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}
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menu_list_draw :: proc(list: ^MenuList($T)) {
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if list.background[3] != 0 {
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size := menu_list_get_size(list)
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rl.DrawRectangleV(list.position - {40, 40}, size + {80, 80}, list.background)
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}
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rl.DrawTextEx(FontUI, ">", list.position + list.active_marker + {-30, 0}, 48, 2, rl.WHITE)
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for el, i in list.elements {
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pos := list.position + {0, f32(i) * list.line_size}
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rl.DrawTextEx(FontUI, el, pos, list.font_size, 2, rl.WHITE)
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}
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}
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menu_list_get_size :: proc(list: ^MenuList($T)) -> vec2 {
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size := vec2{}
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for el, i in list.elements {
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line_size := rl.MeasureTextEx(FontUI, el, list.font_size, 2)
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if line_size.x > size.x {
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size.x = line_size.x
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}
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size.y += list.line_size
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}
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return size
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}
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