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do not check for focus until cursor position has been set #1070

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merged 2 commits into from
Dec 23, 2020
Merged

do not check for focus until cursor position has been set #1070

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06aba51
do not check for focus until cursor position has been set
mockersf Dec 15, 2020
ccf0c4e
simplify focus cursor state
cart Dec 22, 2020
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26 changes: 12 additions & 14 deletions crates/bevy_ui/src/focus.rs
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Original file line number Diff line number Diff line change
@@ -1,11 +1,9 @@
use crate::Node;
use bevy_app::{EventReader, Events};
use bevy_core::FloatOrd;
use bevy_ecs::prelude::*;
use bevy_input::{mouse::MouseButton, touch::Touches, Input};
use bevy_math::Vec2;
use bevy_transform::components::GlobalTransform;
use bevy_window::CursorMoved;
use bevy_window::Windows;

#[derive(Copy, Clone, Eq, PartialEq, Debug)]
pub enum Interaction {
Expand Down Expand Up @@ -34,15 +32,13 @@ impl Default for FocusPolicy {

#[derive(Default)]
pub struct State {
cursor_moved_event_reader: EventReader<CursorMoved>,
cursor_position: Vec2,
hovered_entity: Option<Entity>,
}

pub fn ui_focus_system(
mut state: Local<State>,
windows: Res<Windows>,
mouse_button_input: Res<Input<MouseButton>>,
cursor_moved_events: Res<Events<CursorMoved>>,
touches_input: Res<Touches>,
mut node_query: Query<(
Entity,
Expand All @@ -52,12 +48,14 @@ pub fn ui_focus_system(
Option<&FocusPolicy>,
)>,
) {
if let Some(cursor_moved) = state.cursor_moved_event_reader.latest(&cursor_moved_events) {
state.cursor_position = cursor_moved.position;
}
if let Some(touch) = touches_input.get_pressed(0) {
state.cursor_position = touch.position();
}
let cursor_position = if let Some(cursor_position) = windows
.get_primary()
.and_then(|window| window.cursor_position())
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will that work when having multiple windows? anyway did it even work before with multiple windows?

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It didn't filter according to WindowId, so it would have supported multiple windows for focus events. But the rest of the UI system doesn't support multiple windows, so it doesn't really matter. If/when that ever gets built we can use the same approach here.

{
cursor_position
} else {
return;
};

if mouse_button_input.just_released(MouseButton::Left) || touches_input.just_released(0) {
for (_entity, _node, _global_transform, interaction, _focus_policy) in node_query.iter_mut()
Expand Down Expand Up @@ -85,8 +83,8 @@ pub fn ui_focus_system(
let min = ui_position - extents;
let max = ui_position + extents;
// if the current cursor position is within the bounds of the node, consider it for clicking
if (min.x..max.x).contains(&state.cursor_position.x)
&& (min.y..max.y).contains(&state.cursor_position.y)
if (min.x..max.x).contains(&cursor_position.x)
&& (min.y..max.y).contains(&cursor_position.y)
{
Some((entity, focus_policy, interaction, FloatOrd(position.z)))
} else {
Expand Down