color macro

abletk-common/src/color.rs

@@ -12,6 +12,16 @@ use windows::Win32::Graphics::Direct2D::Common::D2D1_COLOR_F;
 #[derive(Copy, Clone, Debug)]
 pub struct Color(pub f32, pub f32, pub f32, pub f32);
 
+impl Color {
+    pub fn from_rgba(rgba: u32) -> Self {
+        let r = ((rgba >> 24) & 0xFF) as f32 / 255.0;
+        let g = ((rgba >> 16) & 0xFF) as f32 / 255.0;
+        let b = ((rgba >> 8) & 0xFF) as f32 / 255.0;
+        let a = (rgba & 0xFF) as f32 / 255.0;
+        Self(r, g, b, a)
+    }
+}
+
 #[cfg(windows)]
 impl From<Color> for D2D1_COLOR_F {
     fn from(color: Color) -> Self {
@@ -23,3 +33,18 @@ impl From<Color> for D2D1_COLOR_F {
         }
     }
 }
+
+// fixme: figure out how to tell RGB, RGBA, HSL, HSLA, any of those in
+//        hexadecimal numbers, etc. apart.
+#[macro_export]
+macro_rules! color {
+    ($r:expr, $g:expr, $b:expr, $a:expr) => {
+        $crate::color::Color($r, $g, $b, $a)
+    };
+    ($r:expr, $g:expr, $b:expr) => {
+        $crate::color::Color($r, $g, $b, 1.0)
+    };
+    // ($rgba:expr) => {
+    //    $crate::color::Color::from_rgba($rgba)
+    // };
+}

src/lib.rs

@@ -26,5 +26,6 @@ pub mod prelude {
     pub use crate::widget::Label;
     pub use crate::widget::Widget;
     pub use crate::window::*;
+    pub use crate::color;
     pub use crate::launch;
 }

src/main.rs

@@ -15,6 +15,5 @@ fn launch() -> _ {
         .apply_plugin(QuitPlugin)
         .add_window(Window::builder(
             Label::new("Hello, AbleTK!")
-                .color(Color(1.0, 0.0, 1.0, 1.0))
+                .color(color!(0xFF00FFFF))))
-        ))
 }