refactor: move fixed_window to ui

This is a ui module

Signed-off-by: William Casarin <jb55@jb55.com>

src/ui/fixed_window.rs

@@ -0,0 +1,62 @@
+use egui::{Rect, Response, RichText, Sense, Window};
+
+pub struct FixedWindow {
+    title: Option<RichText>,
+}
+
+#[derive(PartialEq)]
+pub enum FixedWindowResponse {
+    Opened,
+    Closed,
+}
+
+impl FixedWindow {
+    #[allow(dead_code)]
+    pub fn new() -> Self {
+        Self { title: None }
+    }
+
+    pub fn maybe_with_title(maybe_title: Option<RichText>) -> Self {
+        Self { title: maybe_title }
+    }
+
+    #[allow(dead_code)]
+    pub fn with_title(mut self, title: RichText) -> Self {
+        self.title = Some(title);
+        self
+    }
+
+    pub fn show(
+        self,
+        ui: &mut egui::Ui,
+        rect: Rect,
+        add_contents: impl FnOnce(&mut egui::Ui) -> Response,
+    ) -> FixedWindowResponse {
+        let mut is_open = true;
+
+        let use_title_bar = self.title.is_some();
+        let title = if let Some(title) = self.title {
+            title
+        } else {
+            RichText::new("")
+        };
+
+        Window::new(title)
+            .open(&mut is_open)
+            .fixed_rect(rect)
+            .collapsible(false)
+            .movable(false)
+            .resizable(false)
+            .title_bar(use_title_bar)
+            .show(ui.ctx(), |ui| {
+                let resp = add_contents(ui);
+                ui.allocate_rect(resp.rect, Sense::hover())
+            });
+
+        if !is_open {
+            FixedWindowResponse::Closed
+        } else {
+            FixedWindowResponse::Opened
+        }
+    }
+}