feat(engine): add window function to set mouse button callback

1 files changed, 72 insertions, 0 deletions

diff --git a/engine/src/window.rs b/engine/src/window.rs
index ad239a1..008c09b 100644
--- a/engine/src/window.rs
+++ b/engine/src/window.rs
@@ -169,6 +169,24 @@ impl Window
             .set_cursor_pos_callback(move |pos| callback(Vec2 { x: pos.x, y: pos.y }));
     }
 
+    /// Sets the window's mouse button callback. The given function is called when a mouse
+    /// button enters a new state.
+    pub fn set_mouse_button_callback(
+        &self,
+        callback: impl Fn(MouseButton, MouseButtonState, KeyModifiers) + 'static,
+    )
+    {
+        self.inner.set_mouse_button_callback(
+            move |mouse_button, mouse_button_state, key_modifiers| {
+                callback(
+                    MouseButton::from_glfw_mouse_button(mouse_button),
+                    MouseButtonState::from_glfw_mouse_button_state(mouse_button_state),
+                    KeyModifiers::from_bits_truncate(key_modifiers.bits()),
+                )
+            },
+        );
+    }
+
     /// Sets the window's close callback.
     pub fn set_close_callback(&self, callback: impl Fn() + 'static)
     {
@@ -514,6 +532,60 @@ impl KeyState
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum MouseButton
+{
+    One,
+    Two,
+    Three,
+    Four,
+    Five,
+    Six,
+    Seven,
+    Eight,
+}
+
+impl MouseButton
+{
+    pub const LEFT: Self = Self::One;
+    pub const MIDDLE: Self = Self::Three;
+    pub const RIGHT: Self = Self::Two;
+
+    fn from_glfw_mouse_button(mouse_button: glfw::window::MouseButton) -> Self
+    {
+        match mouse_button {
+            glfw::window::MouseButton::One => Self::One,
+            glfw::window::MouseButton::Two => Self::Two,
+            glfw::window::MouseButton::Three => Self::Three,
+            glfw::window::MouseButton::Four => Self::Four,
+            glfw::window::MouseButton::Five => Self::Five,
+            glfw::window::MouseButton::Six => Self::Six,
+            glfw::window::MouseButton::Seven => Self::Seven,
+            glfw::window::MouseButton::Eight => Self::Eight,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum MouseButtonState
+{
+    Pressed,
+    Released,
+}
+
+impl MouseButtonState
+{
+    fn from_glfw_mouse_button_state(
+        mouse_button_state: glfw::window::MouseButtonState,
+    ) -> Self
+    {
+        match mouse_button_state {
+            glfw::window::MouseButtonState::Pressed => Self::Pressed,
+            glfw::window::MouseButtonState::Released => Self::Released,
+        }
+    }
+}
+
 bitflags! {
     #[derive(Debug, Clone, Copy)]
     pub struct KeyModifiers: i32 {