separate windows out, IPCcargo run --release!

src/essential/desktop_background.rs

@@ -0,0 +1,44 @@
+use std::vec;
+use std::vec::Vec;
+
+use crate::window_manager::{ DrawInstructions, WindowLike, WindowLikeType, TASKBAR_HEIGHT, INDICATOR_HEIGHT };
+use crate::messages::{ WindowMessage, WindowMessageResponse };
+use crate::framebuffer::Dimensions;
+use crate::themes::ThemeInfo;
+
+pub struct DesktopBackground {
+  dimensions: Dimensions,
+}
+
+impl WindowLike for DesktopBackground {
+  fn handle_message(&mut self, message: WindowMessage) -> WindowMessageResponse {
+    match message {
+      WindowMessage::Init(dimensions) => {
+        self.dimensions = dimensions;
+        WindowMessageResponse::JustRerender
+      },
+      _ => WindowMessageResponse::DoNothing,
+    }
+  }
+
+  //simple
+  fn draw(&self, _theme_info: &ThemeInfo) -> Vec<DrawInstructions> {
+    vec![DrawInstructions::Rect([0, 0], self.dimensions, [0, 128, 128])]
+  }
+
+  //properties
+  fn subtype(&self) -> WindowLikeType {
+    WindowLikeType::DesktopBackground
+  }
+
+  fn ideal_dimensions(&self, dimensions: Dimensions) -> Dimensions {
+    [dimensions[0], dimensions[1] - TASKBAR_HEIGHT - INDICATOR_HEIGHT]
+  }
+}
+
+impl DesktopBackground {
+  pub fn new() -> Self {
+    Self { dimensions: [0, 0] }
+  }
+}
+