Mark b170f3f53f
Reworked renderer for Directives
Added OwnedTextArea & reworked textarea creation
Added ScrollBox
2024-02-07 15:58:14 -08:00

137 lines
3.3 KiB
Rust

use nalgebra::Vector2;
use rhai::{Dynamic, ImmutableString};
use std::{cell::RefCell, collections::HashMap, rc::Rc};
use winit::window::Window;
use super::{super::api::Rect, OwnedTextArea};
use crate::{ui::UiElement, InputEvent, RenderInput, RenderState};
#[derive(Debug)]
pub struct UiScrollbox {
pub name: ImmutableString,
pub rect: Rect,
pub offset: Vector2<f32>,
pub elements: HashMap<ImmutableString, Rc<RefCell<UiElement>>>,
has_mouse: bool,
}
impl UiScrollbox {
pub fn new(name: ImmutableString, rect: Rect) -> Self {
Self {
name,
rect,
elements: HashMap::new(),
offset: Vector2::new(0.0, 0.0),
has_mouse: false,
}
}
pub fn add_element(&mut self, e: Rc<RefCell<UiElement>>) {
let name = e.borrow().get_name().clone();
self.elements.insert(name, e);
}
pub fn remove_element(&mut self, sprite: &ImmutableString) {
self.elements.remove(sprite);
}
pub fn step(&mut self, t: f32) {
for (_name, e) in &self.elements {
match &mut *e.clone().borrow_mut() {
UiElement::Sprite(sprite) => sprite.step(t),
UiElement::RadialBar(_) => {}
UiElement::Text(..) => {}
UiElement::Scrollbox(..) => {}
UiElement::SubElement { .. } => {}
}
}
}
pub fn handle_event(
&mut self,
input: &RenderInput,
state: &mut RenderState,
event: &InputEvent,
) -> Option<Dynamic> {
let r = self
.rect
.to_centered(&state.window, input.ct.config.ui_scale);
// TODO: handle only if used in event()
// i.e, scrollable sprites shouldn't break scrollboxes
// First, check if this event is captured by any sub-elements
for (_, e) in &mut self.elements {
let arg = match &mut *e.borrow_mut() {
UiElement::Sprite(sprite) => sprite.handle_event(&input, state, &event),
UiElement::Scrollbox(sbox) => sbox.handle_event(&input, state, &event),
UiElement::RadialBar(_) | UiElement::Text(..) => None,
// Subelements are intentionally skipped,
// they should be handled by their parent's `handle_event` method.
UiElement::SubElement { .. } => None,
};
if arg.is_some() {
return arg;
}
}
// If no inner events were captured, handle self events.
match event {
InputEvent::MouseMove(pos) => {
if r.contains_mouse(state, pos) && !self.has_mouse {
self.has_mouse = true;
}
if !r.contains_mouse(state, pos) && self.has_mouse {
self.has_mouse = false;
}
}
InputEvent::Scroll(x) => {
if self.has_mouse {
self.offset.y -= x;
}
}
_ => return None,
}
return None;
}
}
impl UiScrollbox {
pub fn push_to_buffer(&self, input: &RenderInput, state: &mut RenderState) {
for (_name, e) in &self.elements {
match &*e.clone().borrow() {
UiElement::Sprite(sprite) => {
sprite.push_to_buffer_with_offset(input, state, self.offset)
}
UiElement::RadialBar(..) => {}
UiElement::Text(..) => {}
UiElement::Scrollbox(..) => {}
UiElement::SubElement { .. } => {}
}
}
}
}
// TODO: don't allocate here
impl<'a> UiScrollbox {
pub fn get_textareas(&'a self, input: &RenderInput, window: &Window) -> Vec<OwnedTextArea> {
let mut v = Vec::with_capacity(32);
for e in self.elements.values() {
match &*e.clone().borrow() {
UiElement::Text(x) => {
v.push(x.get_textarea_with_offset(input, window, self.offset))
}
_ => {}
}
}
return v;
}
}