add option for undecorated_shadow on windows (#2285)

* add option for undecorated_shadow on windows

* formated

1 files changed, 7 insertions, 0 deletions

diff --git a/core/src/window/settings/windows.rs b/core/src/window/settings/windows.rs
index 88fe2fbd..a47582a6 100644
--- a/core/src/window/settings/windows.rs
+++ b/core/src/window/settings/windows.rs
@@ -8,6 +8,12 @@ pub struct PlatformSpecific {
 
     /// Whether show or hide the window icon in the taskbar.
     pub skip_taskbar: bool,
+
+    /// Shows or hides the background drop shadow for undecorated windows.
+    ///
+    /// The shadow is hidden by default.
+    /// Enabling the shadow causes a thin 1px line to appear on the top of the window.
+    pub undecorated_shadow: bool,
 }
 
 impl Default for PlatformSpecific {
@@ -15,6 +21,7 @@ impl Default for PlatformSpecific {
         Self {
             drag_and_drop: true,
             skip_taskbar: false,
+            undecorated_shadow: false,
         }
     }
 }