105 lines
2.6 KiB
Rust
105 lines
2.6 KiB
Rust
use crate::{Color, Vec2, CursorEventKind};
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static mut PANEL_IMPLS: Vec<Box<dyn PanelImpl>> = Vec::new();
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#[no_mangle]
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pub extern "C" fn bind_panel(panel: u32) -> u32 {
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unsafe {
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let panel = UiPanel::bind(panel);
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let panel_impl = Box::new(crate::DummyPanel::bind(panel));
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let id = PANEL_IMPLS.len() as u32;
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PANEL_IMPLS.push(panel_impl);
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id
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}
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}
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#[no_mangle]
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pub extern "C" fn update(dt: f32) {
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unsafe {
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for panel in PANEL_IMPLS.iter_mut() {
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panel.update(dt);
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}
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}
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}
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#[macro_export]
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macro_rules! handle_cursor_event {
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($event: ident, $kind: expr) => {
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#[no_mangle]
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pub extern "C" fn $event(id: u32, x: f32, y: f32) {
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unsafe {
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let panel = &mut PANEL_IMPLS[id as usize];
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let at = Vec2::new(x, y);
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(&mut *panel).on_cursor_event($kind, at);
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}
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}
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};
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}
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handle_cursor_event!(on_hover, CursorEventKind::Hover);
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handle_cursor_event!(on_select, CursorEventKind::Select);
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handle_cursor_event!(on_drag, CursorEventKind::Drag);
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handle_cursor_event!(on_deselect, CursorEventKind::Deselect);
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#[allow(unused)]
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pub trait PanelImpl {
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fn update(&mut self, dt: f32) {}
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fn on_cursor_event(&mut self, kind: CursorEventKind, at: Vec2) {}
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}
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extern "C" {
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fn UiPanel_getWidth(panel: u32) -> f32;
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fn UiPanel_getHeight(panel: u32) -> f32;
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fn UiPanel_setSize(panel: u32, width: f32, height: f32);
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fn UiPanel_setColor(panel: u32, r: f32, g: f32, b: f32, a: f32);
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#[link_name = "UiPanel_drawTriangle"]
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fn UiPanel_drawTriangle(
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panel: u32,
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x1: f32,
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y1: f32,
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x2: f32,
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y2: f32,
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x3: f32,
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y3: f32,
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r: f32,
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g: f32,
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b: f32,
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a: f32,
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);
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}
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#[repr(transparent)]
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#[derive(Copy, Clone)]
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pub struct UiPanel(u32);
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impl UiPanel {
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pub unsafe fn bind(id: u32) -> Self {
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Self(id)
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}
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pub fn get_width(&self) -> f32 {
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unsafe { UiPanel_getWidth(self.0) }
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}
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pub fn get_height(&self) -> f32 {
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unsafe { UiPanel_getHeight(self.0) }
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}
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pub fn set_size(&mut self, width: f32, height: f32) {
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unsafe { UiPanel_setSize(self.0, width, height) }
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}
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pub fn set_color(&mut self, color: &Color) {
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unsafe { UiPanel_setColor(self.0, color.r, color.g, color.b, color.a) }
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}
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pub fn draw_triangle(&self, v1: Vec2, v2: Vec2, v3: Vec2, color: Color) {
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unsafe {
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UiPanel_drawTriangle(
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self.0, v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, color.r, color.g, color.b, color.a,
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)
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}
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}
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}
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