Add ability to hide the cursor

pixelgl/window.go

@@ -45,6 +45,7 @@ type Window struct {
 	bounds        pixel.Rect
 	canvas        *Canvas
 	vsync         bool
+	cursorVisible bool
 
 	// need to save these to correctly restore a fullscreen window
 	restore struct {
@@ -291,6 +292,24 @@ func (w *Window) VSync() bool {
 	return w.vsync
 }
 
+// SetCursorVisible sets the visibility of the mouse cursor inside the window client area
+func (w *Window) SetCursorVisible(visible bool) {
+	w.cursorVisible = visible
+	mainthread.Call(func() {
+		if visible && w.window.GetInputMode(glfw.CursorMode) != glfw.CursorNormal {
+			w.window.SetInputMode(glfw.CursorMode, glfw.CursorNormal)
+		}
+		if !visible && w.window.GetInputMode(glfw.CursorMode) != glfw.CursorHidden {
+			w.window.SetInputMode(glfw.CursorMode, glfw.CursorHidden)
+		}
+	})
+}
+
+// CursorVisible returns the visibility status of the mouse cursor
+func (w *Window) CursorVisible() bool {
+	return w.cursorVisible
+}
+
 // Note: must be called inside the main thread.
 func (w *Window) begin() {
 	if currWin != w {