rename border_radius to corner_radius add it to mom downloader example

hui-examples/examples/align_test.rs

@@ -66,7 +66,7 @@ fn main() {
           elements: vec![
             Box::new(ProgressBar {
               value: z,
-              border_radius: Corners::all(0.25 * ProgressBar::DEFAULT_HEIGHT),
+              corner_radius: Corners::all(0.25 * ProgressBar::DEFAULT_HEIGHT),
               ..Default::default()
             }),
             Box::new(Container {
@@ -81,7 +81,10 @@ fn main() {
                 }),
                 Box::new(Rect {
                   size: (UiSize::Fraction(z / 2. + 0.5), UiSize::Static(30.)),
-                  color: vec4(0., 0.75, 0., 1.).into()
+                  color: Corners::left_right(
+                    vec4(1., 0., 0., 1.),
+                    vec4(0., 1., 0., 1.)
+                  ).into()
                 }),
               ],
               ..Default::default()

hui-examples/examples/mom_downloader.rs

@@ -67,6 +67,7 @@ fn main() {
                 });
                 el.add(ProgressBar {
                   value: mom_ratio,
+                  corner_radius: Corners::all(0.125 * ProgressBar::DEFAULT_HEIGHT),
                   ..Default::default()
                 });
                 el.add(Container {

hui-examples/examples/rounded_rect.rs

@@ -38,9 +38,11 @@ fn main() {
         hui.begin();
 
         hui.add(Container {
+          gap: 10.,
           align: Alignment::Center.into(),
           size: (UiSize::Fraction(1.), UiSize::Fraction(1.)),
-          elements: vec![Box::new(Container {
+          elements: vec![
+            Box::new(Container {
               align: Alignment::Center.into(),
               size: (UiSize::Fraction(0.5), UiSize::Fraction(0.5)),
               background: vec4(1., 0., 0., 1.).into(),
@@ -76,7 +78,51 @@ fn main() {
                 }),
               ],
               ..Default::default()
-          })],
+            }),
+            Box::new(Container {
+              gap: 10.,
+              direction: UiDirection::Horizontal,
+              elements: vec![
+                Box::new(Container {
+                  size: (UiSize::Static(100.), UiSize::Static(100.)),
+                  background: Corners::left_right(
+                    vec4(1., 0., 0., 1.),
+                    vec4(0., 1., 0., 1.)
+                  ).into(),
+                  corner_radius: Corners::all(0.),
+                  ..Default::default()
+                }),
+                Box::new(Container {
+                  size: (UiSize::Static(100.), UiSize::Static(100.)),
+                  background: Corners::left_right(
+                    vec4(1., 0., 0., 1.),
+                    vec4(0., 1., 0., 1.)
+                  ).into(),
+                  corner_radius: Corners::all(10.),
+                  ..Default::default()
+                }),
+                Box::new(Container {
+                  size: (UiSize::Static(100.), UiSize::Static(100.)),
+                  background: Corners::left_right(
+                    vec4(1., 0., 0., 1.),
+                    vec4(0., 1., 0., 1.)
+                  ).into(),
+                  corner_radius: Corners::all(20.),
+                  ..Default::default()
+                }),
+                Box::new(Container {
+                  size: (UiSize::Static(100.), UiSize::Static(100.)),
+                  background: Corners::left_right(
+                    vec4(1., 0., 0., 1.),
+                    vec4(0., 1., 0., 1.)
+                  ).into(),
+                  corner_radius: Corners::all(30.),
+                  ..Default::default()
+                }),
+              ],
+              ..Default::default()
+            }),
+          ],
           ..Default::default()
         }, resolution);
 

hui/src/background.rs

@@ -1,4 +1,4 @@
-use glam::Vec4;
+use glam::{vec4, Vec3, Vec4};
 use crate::rectangle::Corners;
 
 // #[derive(Clone, Copy, PartialEq, Eq, Debug)]
@@ -17,9 +17,15 @@ pub enum Background {
   Gradient(Corners<Vec4>),
 }
 
-impl From<Vec4> for Background {
-  fn from(color: Vec4) -> Self {
-    Self::Solid(color)
+impl From<(f32, f32, f32, f32)> for Background {
+  fn from(color: (f32, f32, f32, f32)) -> Self {
+    Self::Solid(vec4(color.0, color.1, color.2, color.3))
+  }
+}
+
+impl From<Corners<Vec4>> for Background {
+  fn from(corners: Corners<Vec4>) -> Self {
+    Self::Gradient(corners)
   }
 }
 
@@ -32,6 +38,44 @@ impl From<Option<Vec4>> for Background {
   }
 }
 
+impl From<Vec4> for Background {
+  fn from(color: Vec4) -> Self {
+    Self::Solid(color)
+  }
+}
+
+impl From<(f32, f32, f32)> for Background {
+  fn from(color: (f32, f32, f32)) -> Self {
+    Self::Solid(vec4(color.0, color.1, color.2, 1.))
+  }
+}
+
+impl From<Corners<Vec3>> for Background {
+  fn from(corners: Corners<Vec3>) -> Self {
+    Self::Gradient(Corners {
+      top_left: corners.top_left.extend(1.),
+      top_right: corners.top_right.extend(1.),
+      bottom_left: corners.bottom_left.extend(1.),
+      bottom_right: corners.bottom_right.extend(1.),
+    })
+  }
+}
+
+impl From<Option<Vec3>> for Background {
+  fn from(color: Option<Vec3>) -> Self {
+    match color {
+      Some(color) => Self::Solid(color.extend(1.)),
+      None => Self::Transparent,
+    }
+  }
+}
+
+impl From<Vec3> for Background {
+  fn from(color: Vec3) -> Self {
+    Self::Solid(color.extend(1.))
+  }
+}
+
 impl Background {
   /// Currently, never returns None.\
   /// `Option` has been added in preparation for future changes.\

hui/src/element/builtin/progress_bar.rs

@@ -9,7 +9,7 @@ pub struct ProgressBar {
   pub value: f32,
   pub color_foreground: Vec4,
   pub color_background: Vec4,
-  pub border_radius: Corners<f32>,
+  pub corner_radius: Corners<f32>,
 }
 
 impl ProgressBar {
@@ -23,7 +23,7 @@ impl Default for ProgressBar {
       value: 0.,
       color_foreground: vec4(0.0, 0.0, 1.0, 1.0),
       color_background: vec4(0.0, 0.0, 0.0, 1.0),
-      border_radius: Corners::all(0.),
+      corner_radius: Corners::all(0.),
     }
   }
 }
@@ -53,9 +53,9 @@ impl UiElement for ProgressBar {
   fn process(&self, ctx: ProcessContext) {
     let value = self.value.clamp(0., 1.);
     let rounded_corners =
-      (self.border_radius.max_f32() > 0.).then_some({
+      (self.corner_radius.max_f32() > 0.).then_some({
         //HACK: fix clipping issues; //todo: get rid of this
-        let mut radii = self.border_radius;
+        let mut radii = self.corner_radius;
         let width = ctx.measure.size.x * value;
         if width <= radii.max_f32() * 2. {
           radii.bottom_right = 0.;