Home | History | Annotate | Download | only in wm 
      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
     73