settings up repo

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "shape_maker"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bevy = "0.7.0"
+bevy_egui = { version = "0.14.0", features = ["manage_clipboard"] }
+bevy_prototype_lyon = "0.5.0"

src/lib.rs

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+use bevy_egui::egui;
+
+#[derive(Debug)]
+pub enum Action {
+    Create, Modify, Delete
+}
+pub struct UiState {
+    pub current_action: Action,
+
+}
+impl Default for UiState {
+    fn default() -> Self {
+        Self { current_action: Action::Modify }
+    }
+}
+#[derive(Debug)]
+pub struct ButtonsColors {
+    pub regular: egui::Rgba,
+    pub clicked: egui::Rgba,
+}
+impl Default for ButtonsColors {
+    fn default() -> Self {
+        Self { 
+            regular: egui::Rgba::from_rgb(0.3, 0.3, 0.3),
+            clicked: egui::Rgba::from_rgb(1.0, 1.0, 1.0)
+        }
+    }
+}

src/main.rs

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+use bevy::{prelude::*, window::PresentMode, winit::WinitSettings};
+use bevy_egui::{egui, EguiContext, EguiPlugin};
+use bevy_prototype_lyon::prelude::*;
+
+use shape_maker::*;
+
+
+/// This example demonstrates the following functionality and use-cases of bevy_egui:
+/// - rendering loaded assets;
+/// - toggling hidpi scaling (by pressing '/' button);
+/// - configuring egui contexts during the startup.
+fn main() {
+    App::new()
+        .insert_resource(ClearColor(Color::rgb(0.1, 0.1, 0.12)))
+        .insert_resource(Msaa { samples: 4 })
+        // Optimal power saving and present mode settings for desktop apps.
+        .insert_resource(WinitSettings::desktop_app())
+        .insert_resource(WindowDescriptor {
+            present_mode: PresentMode::Mailbox,
+            title: "Shape Maker".to_string(),
+            ..Default::default()
+        })
+        .insert_resource(ButtonsColors::default())
+        .insert_resource(UiState::default())
+        .add_plugins(DefaultPlugins)
+        .add_plugin(EguiPlugin)
+        .add_plugin(ShapePlugin)
+        .add_startup_system(configure_visuals)
+        .add_system(action_bar_sys)
+        .run();
+}
+
+fn configure_visuals(mut egui_ctx: ResMut<EguiContext>) {
+    egui_ctx.ctx_mut().set_visuals(egui::Visuals {
+        window_rounding: 0.0.into(),
+        ..Default::default()
+    });
+}
+
+fn action_bar_sys(
+    mut egui_ctx: ResMut<EguiContext>,
+    mut state: ResMut<UiState>,
+    colors: Res<ButtonsColors>,
+) {
+    egui::Window::new("buttons_float")
+        .default_pos((50.0, 20.0))
+        .title_bar(false)
+        .resizable(false)
+        .show(egui_ctx.ctx_mut(), |ui| {
+            ui.horizontal(|hui| {
+                let modify_color = if let Action::Modify = state.current_action { colors.clicked } else { colors.regular };
+                let create_color = if let Action::Create = state.current_action { colors.clicked } else { colors.regular };
+                let delete_color = if let Action::Delete = state.current_action { colors.clicked } else { colors.regular };
+
+                if hui.button(egui::RichText::new("M").color(modify_color)).clicked() {
+                    state.current_action = Action::Modify;
+                }
+                if hui.button(egui::RichText::new("C").color(create_color)).clicked() {
+                    state.current_action = Action::Create;
+                }
+                if hui.button(egui::RichText::new("D").color(delete_color)).clicked() {
+                    state.current_action = Action::Delete;
+                }
+                hui.label(" | ");
+
+                if hui.button(" I ").clicked() {
+                    println!("Image loading is still not supported!");
+                }
+
+                hui.label(": :");
+            });
+        });
+}