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+import lustre
+import lustre/animation.{Animations}
+import lustre/attribute.{style}
+import lustre/effect.{Effect}
+import lustre/element.{text}
+import lustre/element/html.{button, div, h3, span}
+import lustre/event.{on_click}
+import gleam/float
+
+pub type Msg {
+ Left
+ Right
+ Top
+ Bottom
+ Tick(time_offset: Float)
+}
+
+pub type Model {
+ Model(x: Float, y: Float, animations: Animations)
+}
+
+pub fn main() {
+ lustre.application(init, update, render)
+ |> lustre.start("#root", Nil)
+}
+
+fn init(_) {
+ #(Model(0.5, 0.5, animation.new()), effect.none())
+}
+
+pub fn update(model: Model, msg: Msg) -> #(Model, Effect(Msg)) {
+ let m = case msg {
+ Left -> {
+ let new_animations =
+ animation.add(model.animations, "x", model.x, 0.0, 2.5)
+ Model(..model, animations: new_animations)
+ }
+ Right -> {
+ let new_animations =
+ animation.add(model.animations, "x", model.x, 1.0, 2.5)
+ Model(..model, animations: new_animations)
+ }
+ Top -> {
+ let new_animations =
+ animation.add(model.animations, "y", model.y, 0.0, 2.5)
+ Model(..model, animations: new_animations)
+ }
+ Bottom -> {
+ let new_animations =
+ animation.add(model.animations, "y", model.y, 1.0, 2.5)
+ Model(..model, animations: new_animations)
+ }
+ Tick(time_offset) -> {
+ let new_animations = animation.tick(model.animations, time_offset)
+ let x = animation.value(new_animations, "x", model.x)
+ let y = animation.value(new_animations, "y", model.y)
+ Model(x: x, y: y, animations: new_animations)
+ }
+ }
+ #(m, animation.effect(m.animations, Tick))
+}
+
+pub fn render(model: Model) {
+ let sp = span([], [])
+ let to_s = float.to_string
+ div(
+ [
+ style([
+ #("display", "grid"),
+ #("grid-template-rows", "1fr auto"),
+ #("width", "100%"),
+ #("height", "100%"),
+ ]),
+ ],
+ [
+ div(
+ [
+ style([
+ #("display", "grid"),
+ #(
+ "grid-template-rows",
+ to_s(model.y) <> "fr auto " <> to_s(1.0 -. model.y) <> "fr",
+ ),
+ #(
+ "grid-template-columns",
+ to_s(model.x) <> "fr auto " <> to_s(1.0 -. model.x) <> "fr",
+ ),
+ ]),
+ ],
+ [sp, sp, sp, sp, h3([], [text("Move me around")]), sp, sp, sp, sp],
+ ),
+ div(
+ [],
+ [
+ button([on_click(Left)], [text("Move to the Left")]),
+ button([on_click(Right)], [text("Move to the Right")]),
+ button([on_click(Top)], [text("Move to the Top")]),
+ button([on_click(Bottom)], [text("Move to the Bottom")]),
+ ],
+ ),
+ ],
+ )
+}