Add ctrl+drag feature for allowing resizing window with exact positioning.

ash/wm/workspace/multi_window_resize_controller.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/workspace/multi_window_resize_controller.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/root_window_event_filter.h"
 #include "ash/wm/window_animations.h"
@@ skipping 68 matching lines @@
   }
   virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE {
     gfx::Point location(event.location());
     views::View::ConvertPointToScreen(this, &location);
     controller_->StartResize(location);
     return true;
   }
   virtual bool OnMouseDragged(const views::MouseEvent& event) OVERRIDE {
     gfx::Point location(event.location());
     views::View::ConvertPointToScreen(this, &location);
-    controller_->Resize(location);
+    controller_->Resize(location, event.flags());
     return true;
   }
   virtual void OnMouseReleased(const views::MouseEvent& event) OVERRIDE {
-    controller_->CompleteResize();
+    controller_->CompleteResize(event.flags());
   }
   virtual void OnMouseCaptureLost() OVERRIDE {
     controller_->CancelResize();
   }
   virtual gfx::NativeCursor GetCursor(
       const views::MouseEvent& event) OVERRIDE {
     int component = (direction_ == LEFT_RIGHT) ? HTRIGHT : HTBOTTOM;
     return RootWindowEventFilter::CursorForWindowComponent(component);
   }
 
@@ skipping 289 matching lines @@
   std::vector<aura::Window*> windows;
   windows.push_back(windows_.window2);
   FindWindowsTouching(windows_.window2, windows_.direction,
                       &windows_.other_windows);
   for (size_t i = 0; i < windows_.other_windows.size(); ++i) {
     windows_.other_windows[i]->AddObserver(this);
     windows.push_back(windows_.other_windows[i]);
   }
   int component = windows_.direction == LEFT_RIGHT ? HTRIGHT : HTBOTTOM;
   window_resizer_.reset(WorkspaceWindowResizer::Create(
-      windows_.window1, parent_location, component, grid_size_, windows));
+      windows_.window1, parent_location, component, windows));
 }
 
-void MultiWindowResizeController::Resize(const gfx::Point& screen_location) {
+void MultiWindowResizeController::Resize(const gfx::Point& screen_location,
+                                         int event_flags) {
   gfx::Point parent_location(screen_location);
   aura::Window::ConvertPointToWindow(windows_.window1->GetRootWindow(),
                                      windows_.window1->parent(),
                                      &parent_location);
-  window_resizer_->Drag(parent_location);
+  window_resizer_->Drag(parent_location, event_flags);
   gfx::Rect bounds = CalculateResizeWidgetBounds(parent_location);
   if (windows_.direction == LEFT_RIGHT)
     bounds.set_y(show_bounds_.y());
   else
     bounds.set_x(show_bounds_.x());
   resize_widget_->SetBounds(bounds);
 }
 
-void MultiWindowResizeController::CompleteResize() {
-  window_resizer_->CompleteDrag();
+void MultiWindowResizeController::CompleteResize(int event_flags) {
+  window_resizer_->CompleteDrag(event_flags);
   window_resizer_.reset();
 
   // Mouse may still be over resizer, if not hide.
   gfx::Point screen_loc = gfx::Screen::GetCursorScreenPoint();
   if (!resize_widget_->GetWindowScreenBounds().Contains(screen_loc))
     Hide();
 }
 
 void MultiWindowResizeController::CancelResize() {
   if (!window_resizer_.get())
@@ skipping 55 matching lines @@
 
   gfx::Point window_loc(screen_location);
   aura::Window::ConvertPointToWindow(
       window->GetRootWindow(), window, &window_loc);
   return window->HitTest(window_loc) &&
       window->delegate()->GetNonClientComponent(window_loc) == component;
 }
 
 }  // namespace internal
 }  // namespace ash