Add Window::current_pos to position a winodw

CHANGELOG.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Added a simple grid layout (`Grid`).
 * Added `ui.allocate_at_least` and `ui.allocate_exact_size`.
 * Added function `InputState::key_down`.
+* Added `Window::current_pos` to position a window.
 
 ### Changed 🔧
 

egui/src/containers/area.rs

@@ -47,7 +47,7 @@ pub struct Area {
     interactable: bool,
     order: Order,
     default_pos: Option<Pos2>,
-    fixed_pos: Option<Pos2>,
+    new_pos: Option<Pos2>,
 }
 
 impl Area {
@@ -58,7 +58,7 @@ impl Area {
             interactable: true,
             order: Order::Middle,
             default_pos: None,
-            fixed_pos: None,
+            new_pos: None,
         }
     }
 
@@ -104,11 +104,17 @@ impl Area {
     /// Positions the window and prevents it from being moved
     pub fn fixed_pos(mut self, fixed_pos: impl Into<Pos2>) -> Self {
         let fixed_pos = fixed_pos.into();
-        self.default_pos = Some(fixed_pos);
+        self.new_pos = Some(fixed_pos);
-        self.fixed_pos = Some(fixed_pos);
         self.movable = false;
         self
     }
+
+    /// Positions the window but you can still move it.
+    pub fn current_pos(mut self, current_pos: impl Into<Pos2>) -> Self {
+        let current_pos = current_pos.into();
+        self.new_pos = Some(current_pos);
+        self
+    }
 }
 
 pub(crate) struct Prepared {
@@ -125,7 +131,7 @@ impl Area {
             order,
             interactable,
             default_pos,
-            fixed_pos,
+            new_pos,
         } = self;
 
         let layer_id = LayerId::new(order, id);
@@ -136,7 +142,7 @@ impl Area {
             size: Vec2::zero(),
             interactable,
         });
-        state.pos = fixed_pos.unwrap_or(state.pos);
+        state.pos = new_pos.unwrap_or(state.pos);
         state.pos = ctx.round_pos_to_pixels(state.pos);
 
         Prepared {

egui/src/containers/window.rs

@@ -104,6 +104,13 @@ impl<'open> Window<'open> {
         self
     }
 
+    /// Set current position of the window.
+    /// If the window is movable it is up to you to keep track of where it moved to!
+    pub fn current_pos(mut self, current_pos: impl Into<Pos2>) -> Self {
+        self.area = self.area.current_pos(current_pos);
+        self
+    }
+
     /// Set initial position of the window.
     pub fn default_pos(mut self, default_pos: impl Into<Pos2>) -> Self {
         self.area = self.area.default_pos(default_pos);
@@ -196,6 +203,7 @@ impl<'open> Window<'open> {
 }
 
 impl<'open> Window<'open> {
+    /// Returns `None` if the windows is not open (if [`Window::open`] was called with `&mut false`.
     pub fn show(self, ctx: &CtxRef, add_contents: impl FnOnce(&mut Ui)) -> Option<Response> {
         self.show_impl(ctx, Box::new(add_contents))
     }