ash/wm/resize_shadow_controller.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/wm/resize_shadow_controller.h"
   6
   7 #include <utility>
   8
   9 #include "ash/wm/resize_shadow.h"
  10 #include "ui/aura/window.h"
  11
  12 namespace ash {
  13 namespace internal {
  14
  15 ResizeShadowController::ResizeShadowController() {
  16 }
  17
  18 ResizeShadowController::~ResizeShadowController() {
  19   for (WindowShadowMap::const_iterator it = window_shadows_.begin();
  20        it != window_shadows_.end(); ++it) {
  21     it->first->RemoveObserver(this);
  22   }
  23 }
  24
  25 void ResizeShadowController::ShowShadow(aura::Window* window, int hit_test) {
  26   ResizeShadow* shadow = GetShadowForWindow(window);
  27   if (!shadow)
  28     shadow = CreateShadow(window);
  29   shadow->ShowForHitTest(hit_test);
  30 }
  31
  32 void ResizeShadowController::HideShadow(aura::Window* window) {
  33   ResizeShadow* shadow = GetShadowForWindow(window);
  34   if (shadow)
  35     shadow->Hide();
  36 }
  37
  38 void ResizeShadowController::OnWindowBoundsChanged(
  39     aura::Window* window,
  40     const gfx::Rect& old_bounds,
  41     const gfx::Rect& new_bounds) {
  42   ResizeShadow* shadow = GetShadowForWindow(window);
  43   if (shadow)
  44     shadow->Layout(new_bounds);
  45 }
  46
  47 void ResizeShadowController::OnWindowDestroyed(aura::Window* window) {
  48   window_shadows_.erase(window);
  49 }
  50
  51 ResizeShadow* ResizeShadowController::CreateShadow(aura::Window* window) {
  52   linked_ptr<ResizeShadow> shadow(new ResizeShadow());
  53   window_shadows_.insert(std::make_pair(window, shadow));
  54   // Attach the layers to this window.
  55   shadow->Init(window);
  56   // Ensure initial bounds are correct.
  57   shadow->Layout(window->bounds());
  58   // Watch for bounds changes.
  59   window->AddObserver(this);
  60   return shadow.get();
  61 }
  62
  63 ResizeShadow* ResizeShadowController::GetShadowForWindow(aura::Window* window) {
  64   WindowShadowMap::const_iterator it = window_shadows_.find(window);
  65   return it != window_shadows_.end() ? it->second.get() : NULL;
  66 }
  67
  68 }  // namespace internal
  69 }  // namespace ash