Implement HiDPI scaling

rust/crates/clean_flash_ui/src/widgets/button.rs

@@ -6,6 +6,7 @@ use crate::renderer::Renderer;
 pub struct GradientButton {
     pub rect: Rect,
     pub text: String,
+    pub font_size: f32,
     pub color1: u32,
     pub color2: u32,
     pub back_color: u32,
@@ -23,6 +24,7 @@ impl GradientButton {
         Self {
             rect: Rect::new(x, y, w, h),
             text: text.to_string(),
+            font_size: 13.0,
             color1: Renderer::rgb(118, 118, 118),
             color2: Renderer::rgb(81, 81, 81),
             back_color: Renderer::rgb(0, 0, 0),
@@ -77,7 +79,7 @@ impl GradientButton {
         renderer.draw_rect(r.x, r.y, r.w, r.h, bg);
 
         // Measure text to centre it.
-        let font_size = 13.0;
+        let font_size = self.font_size;
         let (tw, th) = fonts.measure_text(&self.text, font_size);
         let tx = r.x + ((r.w as f32 - tw) / 2.0) as i32;
         let ty = r.y + ((r.h as f32 - th) / 2.0) as i32;

rust/crates/clean_flash_ui/src/widgets/checkbox.rs

@@ -11,8 +11,12 @@ pub struct ImageCheckBox {
 
 impl ImageCheckBox {
     pub fn new(x: i32, y: i32) -> Self {
+        Self::with_size(x, y, 21)
+    }
+
+    pub fn with_size(x: i32, y: i32, size: i32) -> Self {
         Self {
-            rect: Rect::new(x, y, 21, 21),
+            rect: Rect::new(x, y, size, size),
             checked: true,
             enabled: true,
             visible: true,
@@ -43,7 +47,7 @@ impl ImageCheckBox {
             unchecked_img
         };
         if img.width > 0 && img.height > 0 {
-            renderer.draw_image(self.rect.x, self.rect.y, img);
+            renderer.draw_image_scaled(self.rect.x, self.rect.y, self.rect.w, self.rect.h, img);
         } else {
             // Fallback: draw a simple square.
             let bg = if self.checked {

rust/crates/clean_flash_ui/src/widgets/label.rs

@@ -8,6 +8,7 @@ pub struct Label {
     pub text: String,
     pub color: u32,
     pub font_size: f32,
+    pub line_spacing: f32,
     pub visible: bool,
 }
 
@@ -18,6 +19,7 @@ impl Label {
             text: text.to_string(),
             color: Renderer::rgb(245, 245, 245),
             font_size,
+            line_spacing: 2.0,
             visible: true,
         }
     }
@@ -33,7 +35,7 @@ impl Label {
             &self.text,
             self.font_size,
             self.color,
-            2.0,
+            self.line_spacing,
         );
     }