Remove the window focusing hack

src/main/scala/ocelot/desktop/ui/UiHandler.scala

@@ -501,11 +501,6 @@ object UiHandler extends Logging {
         for (mouseTarget <- mouseTarget) {
           dispatchCapturing(mouseTarget)(event)
         }
-
-        // TODO: this should be done in the event capturing phase in [[Window]] itself.
-        for (mouseTarget <- mouseTarget if !mouseTarget.isInstanceOf[Window]) {
-          focusParentWindow(mouseTarget.parent)
-        }
       } else {
         dispatchEvent(hierarchy)(Capturing(event))
         dispatchEvent(hierarchy.reverseIterator)(event)
@@ -525,15 +520,6 @@ object UiHandler extends Logging {
     root.update()
   }
 
-  @tailrec
-  private def focusParentWindow(parent: Option[Widget]): Unit = {
-    parent match {
-      case Some(window: Window) => window.focus()
-      case Some(widget) => focusParentWindow(widget.parent)
-      case None =>
-    }
-  }
-
   private def updateWindowSizeAndPosition(): Unit = {
     val width = Display.getWidth
     val height = Display.getHeight

src/main/scala/ocelot/desktop/ui/widget/window/Window.scala

@@ -4,7 +4,7 @@ import ocelot.desktop.Settings
 import ocelot.desktop.geometry.{Rect2D, Size2D, Vector2D}
 import ocelot.desktop.ui.UiHandler
 import ocelot.desktop.ui.event.handlers.MouseHandler
-import ocelot.desktop.ui.event.{DragEvent, KeyEvent, MouseEvent}
+import ocelot.desktop.ui.event.{Capturing, DragEvent, KeyEvent, MouseEvent}
 import ocelot.desktop.ui.widget.Widget
 import ocelot.desktop.util.Persistable
 import org.lwjgl.input.Keyboard
@@ -30,7 +30,7 @@ trait Window extends Widget with Persistable with MouseHandler {
   override protected def receiveDragEvents: Boolean = true
 
   eventHandlers += {
-    case MouseEvent(MouseEvent.State.Pressed, _) =>
+    case Capturing(MouseEvent(MouseEvent.State.Pressed, _)) =>
       focus()
 
     case ev @ DragEvent(DragEvent.State.Start, MouseEvent.Button.Left, mousePos) =>