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use glutin::event::{
ElementState, Event, ModifiersState, MouseButton, MouseScrollDelta, VirtualKeyCode, WindowEvent,
};
use raui_core::{
application::Application,
interactive::{
InteractionsEngine,
default_interactions_engine::{
DefaultInteractionsEngine, DefaultInteractionsEngineResult, Interaction, PointerButton,
},
},
layout::CoordsMapping,
widget::{
component::interactive::navigation::{NavJump, NavScroll, NavSignal, NavTextChange},
utils::Vec2,
},
};
#[derive(Debug)]
pub struct AppInteractionsEngine {
pub engine: DefaultInteractionsEngine,
pub single_scroll_units: Vec2,
pointer_position: Vec2,
modifiers: ModifiersState,
}
impl Default for AppInteractionsEngine {
fn default() -> Self {
Self::with_capacity(32, 32, 1024, 32, 32, 32, 32, 32, 32)
}
}
impl AppInteractionsEngine {
fn default_single_scroll_units() -> Vec2 {
Vec2 { x: 10.0, y: 10.0 }
}
#[allow(clippy::too_many_arguments)]
pub fn with_capacity(
resize_listeners: usize,
relative_layout_listeners: usize,
interactions_queue: usize,
containers: usize,
buttons: usize,
text_inputs: usize,
scroll_views: usize,
tracking: usize,
selected_chain: usize,
) -> Self {
let mut engine = DefaultInteractionsEngine::with_capacity(
resize_listeners,
relative_layout_listeners,
interactions_queue,
containers,
buttons,
text_inputs,
scroll_views,
tracking,
selected_chain,
);
engine.deselect_when_no_button_found = true;
Self {
engine,
single_scroll_units: Self::default_single_scroll_units(),
pointer_position: Default::default(),
modifiers: Default::default(),
}
}
pub fn event(&mut self, event: &Event<()>, mapping: &CoordsMapping) {
if let Event::WindowEvent { event, .. } = event {
match event {
WindowEvent::ModifiersChanged(modifiers) => {
self.modifiers = *modifiers;
}
WindowEvent::ReceivedCharacter(character) => {
self.engine
.interact(Interaction::Navigate(NavSignal::TextChange(
NavTextChange::InsertCharacter(*character),
)));
}
WindowEvent::CursorMoved { position, .. } => {
self.pointer_position = mapping.real_to_virtual_vec2(
Vec2 {
x: position.x as _,
y: position.y as _,
},
false,
);
self.engine
.interact(Interaction::PointerMove(self.pointer_position));
}
WindowEvent::MouseWheel { delta, .. } => {
let value = match delta {
MouseScrollDelta::LineDelta(x, y) => Vec2 {
x: -self.single_scroll_units.x * *x,
y: -self.single_scroll_units.y * *y,
},
MouseScrollDelta::PixelDelta(delta) => Vec2 {
x: -delta.x as _,
y: -delta.y as _,
},
};
self.engine
.interact(Interaction::Navigate(NavSignal::Jump(NavJump::Scroll(
NavScroll::Units(value, true),
))));
}
WindowEvent::MouseInput { state, button, .. } => match state {
ElementState::Pressed => match button {
MouseButton::Left => {
self.engine.interact(Interaction::PointerDown(
PointerButton::Trigger,
self.pointer_position,
));
}
MouseButton::Right => {
self.engine.interact(Interaction::PointerDown(
PointerButton::Context,
self.pointer_position,
));
}
_ => {}
},
ElementState::Released => match button {
MouseButton::Left => {
self.engine.interact(Interaction::PointerUp(
PointerButton::Trigger,
self.pointer_position,
));
}
MouseButton::Right => {
self.engine.interact(Interaction::PointerUp(
PointerButton::Context,
self.pointer_position,
));
}
_ => {}
},
},
WindowEvent::KeyboardInput { input, .. } => {
if input.state == ElementState::Pressed {
if let Some(key) = input.virtual_keycode {
if self.engine.focused_text_input().is_some() {
match key {
VirtualKeyCode::Left => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::MoveCursorLeft),
))
}
VirtualKeyCode::Right => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::MoveCursorRight),
))
}
VirtualKeyCode::Home => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::MoveCursorStart),
))
}
VirtualKeyCode::End => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::MoveCursorEnd),
))
}
VirtualKeyCode::Back => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::DeleteLeft),
))
}
VirtualKeyCode::Delete => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::DeleteRight),
))
}
VirtualKeyCode::Return | VirtualKeyCode::NumpadEnter => {
self.engine.interact(Interaction::Navigate(
NavSignal::TextChange(NavTextChange::NewLine),
))
}
VirtualKeyCode::Escape => {
self.engine.interact(Interaction::Navigate(
NavSignal::FocusTextInput(().into()),
));
}
_ => {}
}
} else {
match key {
VirtualKeyCode::Up => {
self.engine.interact(Interaction::Navigate(NavSignal::Up))
}
VirtualKeyCode::Down => {
self.engine.interact(Interaction::Navigate(NavSignal::Down))
}
VirtualKeyCode::Left => {
if self.modifiers.shift() {
self.engine
.interact(Interaction::Navigate(NavSignal::Prev));
} else {
self.engine
.interact(Interaction::Navigate(NavSignal::Left));
}
}
VirtualKeyCode::Right => {
if self.modifiers.shift() {
self.engine
.interact(Interaction::Navigate(NavSignal::Next));
} else {
self.engine
.interact(Interaction::Navigate(NavSignal::Right));
}
}
VirtualKeyCode::Return
| VirtualKeyCode::NumpadEnter
| VirtualKeyCode::Space => {
self.engine.interact(Interaction::Navigate(
NavSignal::Accept(true),
));
}
VirtualKeyCode::Escape | VirtualKeyCode::Back => {
self.engine.interact(Interaction::Navigate(
NavSignal::Cancel(true),
));
}
_ => {}
}
}
}
} else if input.state == ElementState::Released
&& let Some(key) = input.virtual_keycode
&& self.engine.focused_text_input().is_none()
{
match key {
VirtualKeyCode::Return
| VirtualKeyCode::NumpadEnter
| VirtualKeyCode::Space => {
self.engine
.interact(Interaction::Navigate(NavSignal::Accept(false)));
}
VirtualKeyCode::Escape | VirtualKeyCode::Back => {
self.engine
.interact(Interaction::Navigate(NavSignal::Cancel(false)));
}
_ => {}
}
}
}
_ => {}
}
}
}
}
impl InteractionsEngine<DefaultInteractionsEngineResult, ()> for AppInteractionsEngine {
fn perform_interactions(
&mut self,
app: &mut Application,
) -> Result<DefaultInteractionsEngineResult, ()> {
self.engine.perform_interactions(app)
}
}