Only drag or maximize / restore when event has not yet been handled.

ash/wm/toplevel_window_event_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/toplevel_window_event_handler.h"
 
 #include "ash/shell.h"
 #include "ash/wm/resize_shadow_controller.h"
 #include "ash/wm/window_resizer.h"
 #include "ash/wm/window_state.h"
@@ skipping 121 matching lines @@
 
 void ToplevelWindowEventHandler::OnKeyEvent(ui::KeyEvent* event) {
   if (window_resizer_.get() && event->type() == ui::ET_KEY_PRESSED &&
       event->key_code() == ui::VKEY_ESCAPE) {
     CompleteDrag(DRAG_REVERT);
   }
 }
 
 void ToplevelWindowEventHandler::OnMouseEvent(
     ui::MouseEvent* event) {
+  if (event->handled())
+    return;
   if ((event->flags() &
       (ui::EF_MIDDLE_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON)) != 0)
     return;
 
   if (in_gesture_drag_)
     return;
 
   aura::Window* target = static_cast<aura::Window*>(event->target());
   switch (event->type()) {
     case ui::ET_MOUSE_PRESSED:
@@ skipping 11 matching lines @@
       break;
     case ui::ET_MOUSE_EXITED:
       HandleMouseExited(target, event);
       break;
     default:
       break;
   }
 }
 
 void ToplevelWindowEventHandler::OnGestureEvent(ui::GestureEvent* event) {
+  if (event->handled())
+    return;
   aura::Window* target = static_cast<aura::Window*>(event->target());
   if (!target->delegate())
     return;
 
   if (window_resizer_.get() && !in_gesture_drag_)
     return;
 
   if (window_resizer_.get() &&
       window_resizer_->resizer()->GetTarget() != target) {
     return;
@@ skipping 194 matching lines @@
     aura::Window* target,
     ui::MouseEvent* event) {
   if (event->phase() != ui::EP_PRETARGET)
     return;
 
   CompleteDrag(event->type() == ui::ET_MOUSE_RELEASED ?
                    DRAG_COMPLETE : DRAG_REVERT);
   // Completing the drag may result in hiding the window. If this happens
   // return true so no other handlers/observers see the event. Otherwise
   // they see the event on a hidden window.
-  if (event->type() == ui::ET_MOUSE_CAPTURE_CHANGED &&
+  if (window_resizer_ &&
+      event->type() == ui::ET_MOUSE_CAPTURE_CHANGED &&
       !target->IsVisible()) {
     event->StopPropagation();
   }
 }
 
 void ToplevelWindowEventHandler::HandleDrag(
     aura::Window* target,
     ui::LocatedEvent* event) {
   // This function only be triggered to move window
   // by mouse drag or touch move event.
@@ skipping 91 matching lines @@
 
 void ToplevelWindowEventHandler::ResizerWindowDestroyed() {
   // We explicitly don't invoke RevertDrag() since that may do things to window.
   // Instead we destroy the resizer.
   window_resizer_.reset();
 
   CompleteDrag(DRAG_REVERT);
 }
 
 }  // namespace ash