Round panel bounds

crates/egui/src/containers/panel.rs

@@ -15,6 +15,8 @@
 //!
 //! Add your [`crate::Window`]:s after any top-level panels.
 
+use emath::GuiRounding as _;
+
 use crate::{
     lerp, vec2, Align, Context, CursorIcon, Frame, Id, InnerResponse, LayerId, Layout, NumExt,
     Rangef, Rect, Sense, Stroke, Ui, UiBuilder, UiKind, UiStackInfo, Vec2,
@@ -264,6 +266,8 @@ impl SidePanel {
             }
         }
 
+        panel_rect = panel_rect.round_point();
+
         let mut panel_ui = ui.new_child(
             UiBuilder::new()
                 .id_salt(id)
@@ -756,6 +760,8 @@ impl TopBottomPanel {
             }
         }
 
+        panel_rect = panel_rect.round_point();
+
         let mut panel_ui = ui.new_child(
             UiBuilder::new()
                 .id_salt(id)
@@ -1130,15 +1136,14 @@ impl CentralPanel {
         ctx: &Context,
         add_contents: Box<dyn FnOnce(&mut Ui) -> R + 'c>,
     ) -> InnerResponse<R> {
-        let available_rect = ctx.available_rect();
         let id = Id::new((ctx.viewport_id(), "central_panel"));
 
         let mut panel_ui = Ui::new(
             ctx.clone(),
             id,
             UiBuilder::new()
                 .layer_id(LayerId::background())
-                .max_rect(available_rect),
+                .max_rect(ctx.available_rect().round_point()),
         );
         panel_ui.set_clip_rect(ctx.screen_rect());
 

crates/egui/src/context.rs

@@ -2567,15 +2567,15 @@ impl Context {
 
     /// Position and size of the egui area.
     pub fn screen_rect(&self) -> Rect {
-        self.input(|i| i.screen_rect())
+        self.input(|i| i.screen_rect()).round_point()
     }
 
     /// How much space is still available after panels has been added.
     ///
     /// This is the "background" area, what egui doesn't cover with panels (but may cover with windows).
     /// This is also the area to which windows are constrained.
     pub fn available_rect(&self) -> Rect {
-        self.pass_state(|s| s.available_rect())
+        self.pass_state(|s| s.available_rect()).round_point()
     }
 
     /// How much space is used by panels and windows.
@@ -2585,15 +2585,15 @@ impl Context {
             for (_id, window) in ctx.memory.areas().visible_windows() {
                 used = used.union(window.rect());
             }
-            used
+            used.round_point()
         })
     }
 
     /// How much space is used by panels and windows.
     ///
     /// You can shrink your egui area to this size and still fit all egui components.
     pub fn used_size(&self) -> Vec2 {
-        self.used_rect().max - Pos2::ZERO
+        (self.used_rect().max - Pos2::ZERO).round_point()
     }
 
     // ---------------------------------------------------------------------