Add set_cursor_position function

src/android/mod.rs

@@ -356,6 +356,10 @@ impl Window {
     pub fn hidpi_factor(&self) -> f32 {
         1.0
     }
+
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        unimplemented!();
+    }
 }
 
 unsafe impl Send for Window {}

src/cocoa/mod.rs

@@ -664,4 +664,8 @@ impl Window {
             NSWindow::backingScaleFactor(self.window) as f32
         }
     }
+
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        unimplemented!();
+    }
 }

src/win32/mod.rs

@@ -255,6 +255,25 @@ impl Window {
     pub fn hidpi_factor(&self) -> f32 {
         1.0
     }
+
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        let mut point = winapi::POINT {
+            x: x,
+            y: y,
+        };
+
+        unsafe {
+            if user32::ClientToScreen(self.window.0, &mut point) == 0 {
+                return Err(());
+            }
+
+            if user32::SetCursorPos(point.x, point.y) == 0 {
+                return Err(());
+            }
+        }
+
+        Ok(())
+    }
 }
 
 pub struct PollEventsIterator<'a> {

src/window.rs

@@ -409,6 +409,11 @@ impl Window {
     pub fn hidpi_factor(&self) -> f32 {
         self.window.hidpi_factor()
     }
+
+    /// Changes the position of the cursor in window coordinates.
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        self.window.set_cursor_position(x, y)
+    }
 }
 
 impl gl_common::GlFunctionsSource for Window {

src/x11/window/mod.rs

@@ -785,4 +785,8 @@ impl Window {
     pub fn hidpi_factor(&self) -> f32 {
         1.0
     }
+
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        unimplemented!();
+    }
 }