mac, win32 floating window

src/windy/platforms/macos/macdefs.nim

@@ -31,6 +31,7 @@ type
   NSStringEncoding* = uint
   NSStringEncodingConversionOptions* = uint
   NSBitmapImageFileType* = uint
+  NSWindowLevel* = int
 
   NSRect* = CGRect
   NSPoint* = CGPoint
@@ -104,6 +105,8 @@ const
   NSTrackingEnabledDuringMouseDrag* = 0x400.NSTrackingAreaOptions
   NSUTF32StringEncoding* = 0x8c000100.NSStringEncoding
   NSBitmapImageFileTypePNG* = 4.NSBitmapImageFileType
+  NSNormalWindowLevel* = 0.NSWindowLevel
+  NSFloatingWindowLevel* = 3.NSWindowLevel
 
 var
   NSApp* {.importc.}: NSApplication
@@ -218,6 +221,8 @@ objc:
   proc toggleFullscreen*(self: NSWindow, _: ID)
   proc invalidateCursorRectsForView*(self: NSWindow, _: NSView)
   proc mouseLocationOutsideOfEventStream*(self: NSWindow): NSPoint
+  proc level*(self: NSWindow): NSWindowLevel
+  proc setLevel*(self: NSWindow, _: NSWindowLevel)
   proc convertRectToBacking*(self: NSView, _: NSRect): NSRect
   proc window*(self: NSView): NSWindow
   proc bounds*(self: NSView): NSRect

src/windy/platforms/macos/platform.nim

@@ -67,6 +67,9 @@ proc style*(window: Window): WindowStyle =
 proc fullscreen*(window: Window): bool =
   (window.inner.styleMask and NSWindowStyleMaskFullScreen) != 0
 
+proc floating*(window: Window): bool =
+  window.inner.level == NSFloatingWindowLevel
+
 proc contentScale*(window: Window): float32 =
   autoreleasepool:
     let
@@ -151,6 +154,17 @@ proc `fullscreen=`*(window: Window, fullscreen: bool) =
   autoreleasepool:
     window.inner.toggleFullscreen(0.ID)
 
+proc `floating=`*(window: Window, floating: bool) =
+  if window.floating == floating:
+    return
+  autoreleasepool:
+    let level =
+      if floating:
+        NSFloatingWindowLevel
+      else:
+        NSNormalWindowLevel
+    window.inner.setLevel(level)
+
 proc `size=`*(window: Window, size: IVec2) =
   autoreleasepool:
     let virtualSize = (size.vec2 / window.contentScale)

src/windy/platforms/win32/platform.nim

@@ -63,6 +63,7 @@ type
     state: WindowState
     trackMouseEventRegistered: bool
     exitFullscreenInfo: ExitFullscreenInfo
+    isFloating: bool
 
     hWnd: HWND
     hdc: HDC
@@ -328,6 +329,9 @@ proc style*(window: Window): WindowStyle =
 proc fullscreen*(window: Window): bool =
   window.exitFullscreenInfo != nil
 
+proc floating*(window: Window): bool =
+  window.isFloating
+
 proc contentScale*(window: Window): float32 =
   let dpi = GetDpiForWindow(window.hWnd)
   result = dpi.float32 / defaultScreenDpi
@@ -432,7 +436,7 @@ proc `fullscreen=`*(window: Window, fullscreen: bool) =
     let mi = window.monitorInfo
     discard SetWindowPos(
       window.hWnd,
-      HWND_TOPMOST,
+      HWND_TOP,
       mi.rcMonitor.left,
       mi.rcMonitor.top,
       mi.rcMonitor.right - mi.rcMonitor.left,
@@ -470,6 +474,22 @@ proc `fullscreen=`*(window: Window, fullscreen: bool) =
     if maximized:
       discard SendMessageW(window.hWnd, WM_SYSCOMMAND, SC_MAXIMIZE, 0)
 
+proc `floating=`*(window: Window, floating: bool) =
+  if window.floating == floating:
+    return
+
+  window.isFloating = floating
+
+  discard SetWindowPos(
+    window.hWnd,
+    if floating: HWND_TOPMOST else: HWND_NOTOPMOST,
+    0,
+    0,
+    0,
+    0,
+    SWP_NOMOVE or SWP_NOSIZE or SWP_NOACTIVATE
+  )
+
 proc `size=`*(window: Window, size: IVec2) =
   if window.fullscreen:
     return