add rect element

kubi-ui/src/element.rs

@@ -6,6 +6,7 @@ use crate::{
   state::StateRepo
 };
 
+#[cfg(feature = "builtin_elements")] pub mod rect;
 #[cfg(feature = "builtin_elements")] pub mod container;
 #[cfg(feature = "builtin_elements")] pub mod spacer;
 #[cfg(feature = "builtin_elements")] pub mod progress_bar;

kubi-ui/src/element/rect.rs

@@ -0,0 +1,46 @@
+use glam::{vec2, Vec4};
+use crate::{state::StateRepo, LayoutInfo, measure::Response, draw::UiDrawCommand, UiSize};
+use super::UiElement;
+
+pub struct Rect {
+  pub size: (UiSize, UiSize),
+  pub color: Option<Vec4>,
+}
+
+impl Default for Rect {
+  fn default() -> Self {
+    Self {
+      size: (UiSize::Pixels(10.), UiSize::Pixels(10.)),
+      color: Some(Vec4::new(0., 0., 0., 0.5)),
+    }
+  }
+}
+
+impl UiElement for Rect {
+  fn measure(&self, _state: &StateRepo, layout: &LayoutInfo) -> Response {
+    Response {
+      desired_size: vec2(
+        match self.size.0 {
+          UiSize::Auto => layout.max_size.x,
+          UiSize::Percentage(percentage) => layout.max_size.x * percentage,
+          UiSize::Pixels(pixels) => pixels,
+        },
+        match self.size.1 {
+          UiSize::Auto => layout.max_size.y,
+          UiSize::Percentage(percentage) => layout.max_size.y * percentage,
+          UiSize::Pixels(pixels) => pixels,
+        },
+      )
+    }
+  }
+
+  fn process(&self, measure: &Response, _state: &mut StateRepo, layout: &LayoutInfo, draw: &mut Vec<UiDrawCommand>) {
+    if let Some(color) = self.color {
+      draw.push(UiDrawCommand::Rectangle {
+        position: layout.position,
+        size: measure.desired_size,
+        color,
+      });
+    }
+  }
+}