Implement get_position for win32 and fix interface

src/events.rs

@@ -8,7 +8,7 @@ pub enum Event {
     SizeChanged(uint, uint),
 
     /// The position of the window has changed.
-    Moved(uint, uint),
+    Moved(int, int),
 
     /// The window has been closed.
     Closed,

src/lib.rs

@@ -52,7 +52,7 @@ impl Window {
     }
 
     #[inline]
-    pub fn get_position(&self) -> (uint, uint) {
+    pub fn get_position(&self) -> (int, int) {
         self.window.get_position()
     }
 

src/win32/ffi.rs

@@ -552,6 +552,17 @@ pub struct DEVMODE {
     pub dmPanningHeight: DWORD,
 }
 
+// http://msdn.microsoft.com/en-us/library/windows/desktop/ms632611(v=vs.85).aspx
+#[repr(C)]
+pub struct WINDOWPLACEMENT {
+    pub length: UINT,
+    pub flags: UINT,
+    pub showCmd: UINT,
+    pub ptMinPosition: POINT,
+    pub ptMaxPosition: POINT,
+    pub rcNormalPosition: RECT,
+}
+
 pub type LPMSG = *mut MSG;
 
 #[link(name = "advapi32")]
@@ -621,6 +632,9 @@ extern "system" {
     // http://msdn.microsoft.com/en-us/library/windows/desktop/ms683212(v=vs.85).aspx
     pub fn GetProcAddress(hModule: HMODULE, lpProcName: LPCSTR) -> *const libc::c_void;
 
+    // http://msdn.microsoft.com/en-us/library/windows/desktop/ms633518(v=vs.85).aspx
+    pub fn GetWindowPlacement(hWnd: HWND, lpwndpl: *mut WINDOWPLACEMENT) -> BOOL;
+
     // http://msdn.microsoft.com/en-us/library/windows/desktop/ms633519(v=vs.85).aspx
     pub fn GetWindowRect(hWnd: HWND, lpRect: *mut RECT) -> BOOL;
 

src/win32/mod.rs

@@ -207,8 +207,18 @@ impl Window {
         }
     }
 
-    pub fn get_position(&self) -> (uint, uint) {
-        unimplemented!()
+    pub fn get_position(&self) -> (int, int) {
+        use std::{mem, os};
+
+        let mut placement: ffi::WINDOWPLACEMENT = unsafe { mem::zeroed() };
+        placement.length = mem::size_of::<ffi::WINDOWPLACEMENT>() as ffi::UINT;
+
+        if unsafe { ffi::GetWindowPlacement(self.window, &mut placement) } == 0 {
+            fail!("GetWindowPlacement failed: {}", os::error_string(os::errno() as uint));
+        }
+
+        let ref rect = placement.rcNormalPosition;
+        (rect.left as int, rect.top as int)
     }
 
     pub fn set_position(&self, x: uint, y: uint) {
@@ -363,8 +373,8 @@ extern "stdcall" fn callback(window: ffi::HWND, msg: ffi::UINT,
 
         ffi::WM_MOVE => {
             use events::Moved;
-            let x = ffi::LOWORD(lparam as ffi::DWORD) as uint;
-            let y = ffi::HIWORD(lparam as ffi::DWORD) as uint;
+            let x = ffi::LOWORD(lparam as ffi::DWORD) as i16 as int;
+            let y = ffi::HIWORD(lparam as ffi::DWORD) as i16 as int;
             send_event(window, Moved(x, y));
             0
         },

src/x11/mod.rs

@@ -117,7 +117,7 @@ impl Window {
         }
     }
 
-    pub fn get_position(&self) -> (uint, uint) {
+    pub fn get_position(&self) -> (int, int) {
         unimplemented!()
     }