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Kinetic windows

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This commit is contained in:
Emil Ernerfeldt
2020-05-03 13:28:47 +02:00
parent bfbb669d02
commit 45564f952b
12 changed files with 398 additions and 229 deletions
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20
emigui/src/containers/floating.rs
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@@ -14,6 +14,10 @@ pub(crate) struct State {
/// Last know size. Used for catching clicks.
pub size: Vec2,
/// You can throw a Floating thing. It's fun.
#[serde(skip)]
pub vel: Vec2,
}
// TODO: rename Floating to something else. Area?
@@ -56,6 +60,7 @@ impl Floating {
let state = State {
pos: default_pos,
size: Vec2::zero(),
vel: Vec2::zero(),
};
(state, true)
}
@@ -75,8 +80,21 @@ impl Floating {
let clip_rect = Rect::everything();
let move_interact = ctx.interact(layer, &clip_rect, &rect, Some(id.with("move")));
let input = ctx.input();
if move_interact.active {
state.pos += ctx.input().mouse_move;
state.pos += input.mouse_move;
state.vel = input.mouse_velocity;
} else {
let stop_speed = 20.0; // Pixels per second.
let friction_coeff = 1000.0; // Pixels per second squared.
let friction = friction_coeff * input.dt;
if friction > state.vel.length() || state.vel.length() < stop_speed {
state.vel = Vec2::zero();
} else {
state.vel -= friction * state.vel.normalized();
state.pos += state.vel * input.dt;
}
}
// Constrain to screen: