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
  14 ResizeShadowController::ResizeShadowController() {
  15 }
  16
  17 ResizeShadowController::~ResizeShadowController() {
  18   for (WindowShadowMap::const_iterator it = window_shadows_.begin();
  19        it != window_shadows_.end(); ++it) {
  20     it->first->RemoveObserver(this);
  21   }
  22 }
  23
  24 void ResizeShadowController::ShowShadow(aura::Window* window, int hit_test) {
  25   ResizeShadow* shadow = GetShadowForWindow(window);
  26   if (!shadow)
  27     shadow = CreateShadow(window);
  28   shadow->ShowForHitTest(hit_test);
  29 }
  30
  31 void ResizeShadowController::HideShadow(aura::Window* window) {
  32   ResizeShadow* shadow = GetShadowForWindow(window);
  33   if (shadow)
  34     shadow->Hide();
  35 }
  36
  37 ResizeShadow* ResizeShadowController::GetShadowForWindowForTest(
  38     aura::Window* window) {
  39   return GetShadowForWindow(window);
  40 }
  41
  42 void ResizeShadowController::OnWindowBoundsChanged(
  43     aura::Window* window,
  44     const gfx::Rect& old_bounds,
  45     const gfx::Rect& new_bounds) {
  46   ResizeShadow* shadow = GetShadowForWindow(window);
  47   if (shadow)
  48     shadow->Layout(new_bounds);
  49 }
  50
  51 void ResizeShadowController::OnWindowDestroyed(aura::Window* window) {
  52   window_shadows_.erase(window);
  53 }
  54
  55 ResizeShadow* ResizeShadowController::CreateShadow(aura::Window* window) {
  56   linked_ptr<ResizeShadow> shadow(new ResizeShadow());
  57   window_shadows_.insert(std::make_pair(window, shadow));
  58   // Attach the layers to this window.
  59   shadow->Init(window);
  60   // Ensure initial bounds are correct.
  61   shadow->Layout(window->bounds());
  62   // Watch for bounds changes.
  63   window->AddObserver(this);
  64   return shadow.get();
  65 }
  66
  67 ResizeShadow* ResizeShadowController::GetShadowForWindow(aura::Window* window) {
  68   WindowShadowMap::const_iterator it = window_shadows_.find(window);
  69   return it != window_shadows_.end() ? it->second.get() : NULL;
  70 }
  71
  72 }  // namespace ash