draw 2 rectangles to prevent the white rectangle from being invisible on

white backgrounds

Cargo.lock

@@ -250,7 +250,7 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "leanshot"
-version = "0.4.0-rc"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "image",

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "leanshot"
 description = "Screenshot capture for Linux."
-version = "0.4.0-rc"
+version = "0.4.0"
 repository = "https://git.mzhang.io/michael/leanshot"
 license-file = "LICENSE"
 edition = "2018"

src/gui.rs

@@ -140,7 +140,7 @@ impl Gui {
             &[
                 (xcb::GC_FOREGROUND, screen.white_pixel()),
                 (xcb::GC_BACKGROUND, screen.white_pixel()),
-                (xcb::GC_LINE_WIDTH, 3),
+                (xcb::GC_LINE_WIDTH, 1),
             ],
         );
 
@@ -175,18 +175,38 @@ impl Gui {
         let mut state = State::default();
         let mut cancelled = false;
 
-        let redraw = |state: &State| {
+        let redraw = |state: &State| -> Result<()> {
             xcb_image::put(&self.conn, window_id, window_gc, &image.image, 0, 0);
 
             if state.dragging {
                 let rect = state.rect();
+                xproto::change_gc(
+                    &self.conn,
+                    window_gc,
+                    &[(xcb::GC_FOREGROUND, screen.black_pixel())],
+                );
                 xproto::poly_rectangle(&self.conn, window_id, window_gc, &[rect]);
+
+                let rect2 = Rectangle::new(
+                    rect.x() + 1,
+                    rect.y() + 1,
+                    rect.width() - 2,
+                    rect.height() - 2,
+                );
+                xproto::change_gc(
+                    &self.conn,
+                    window_gc,
+                    &[(xcb::GC_FOREGROUND, screen.white_pixel())],
+                );
+                xproto::poly_rectangle(&self.conn, window_id, window_gc, &[rect2]);
             }
 
             self.conn.flush();
+
+            Ok(())
         };
 
-        redraw(&state);
+        redraw(&state)?;
 
         while let Some(evt) = self.conn.wait_for_event() {
             match evt.response_type() {
@@ -234,7 +254,7 @@ impl Gui {
                 }
             }
 
-            redraw(&state);
+            redraw(&state)?;
         }
 
         info!("Loop exited, cleaning up...");