2 files changed, 61 insertions, 0 deletions
diff --git a/src/gui/mod.rs b/src/gui/mod.rs
new file mode 100644
index 0000000..a4a000b
--- /dev/null
+++ b/src/gui/mod.rs
@@ -0,0 +1,3 @@
+pub mod tool_sidebar;
+
+pub use self::tool_sidebar::*;
diff --git a/src/gui/tool_sidebar.rs b/src/gui/tool_sidebar.rs
new file mode 100644
index 0000000..32d0410
--- /dev/null
+++ b/src/gui/tool_sidebar.rs
@@ -0,0 +1,58 @@
+use crate::math::{Rect, Vec2};
+use crate::tool::ToolType;
+use crate::Editor;
+use raylib::core::drawing::{RaylibDraw, RaylibDrawHandle};
+use raylib::core::texture::Texture2D;
+use raylib::rgui::RaylibDrawGui;
+use raylib::{RaylibHandle, RaylibThread};
+use std::mem;
+
+pub const BUTTON_FILE: &str = "assets/button/tool_buttons.png";
+
+pub struct ToolSidebar {
+    button_texture: Texture2D,
+}
+
+impl ToolSidebar {
+    pub fn new(rl: &mut RaylibHandle, rlt: &RaylibThread) -> Self {
+        let button_texture = rl
+            .load_texture(rlt, BUTTON_FILE)
+            .expect("Could not read file containing tool icons.");
+
+        Self { button_texture }
+    }
+
+    fn panel_rect(screen_height: u16) -> Rect<f32> {
+        Rect::new(0., 0., 104., screen_height as f32)
+    }
+
+    /// Check if the mouse is currently being captured by this GUI-element. In that case,
+    /// everything else that might want to access the mouse will be blocked.
+    pub fn mouse_captured(screen_height: u16, mouse_pos: Vec2<f32>) -> bool {
+        Self::panel_rect(screen_height).contains(mouse_pos)
+    }
+
+    pub fn draw(&self, screen_height: u16, rld: &mut impl RaylibDrawGui, editor: &mut Editor) {
+        rld.gui_panel(Self::panel_rect(screen_height));
+
+        let mut active = editor.active();
+        for i in 0..ToolType::NumTools as usize {
+            let is_current_active = active as usize == i;
+            if rld.gui_image_button_ex(
+                Rect::new(20., i as f32 * 100. + 20., 64., 64.),
+                None,
+                &self.button_texture,
+                Rect::new(
+                    is_current_active as u8 as f32 * 64.,
+                    i as f32 * 64.,
+                    64.,
+                    64.,
+                ),
+            ) {
+                active = unsafe { mem::transmute(i as u8) };
+            }
+        }
+
+        editor.set_active(active);
+    }
+}