ash/wm/drag_window_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/drag_window_controller.h"
   6
   7 #include "ash/shell_window_ids.h"
   8 #include "ash/wm/window_util.h"
   9 #include "ui/aura/client/screen_position_client.h"
  10 #include "ui/aura/window.h"
  11 #include "ui/compositor/layer.h"
  12 #include "ui/compositor/scoped_layer_animation_settings.h"
  13 #include "ui/views/corewm/shadow_types.h"
  14 #include "ui/views/corewm/window_util.h"
  15 #include "ui/views/view.h"
  16 #include "ui/views/widget/widget.h"
  17
  18 namespace ash {
  19 namespace internal {
  20
  21 DragWindowController::DragWindowController(aura::Window* window)
  22     : window_(window),
  23       drag_widget_(NULL),
  24       layer_(NULL) {
  25 }
  26
  27 DragWindowController::~DragWindowController() {
  28   Hide();
  29 }
  30
  31 void DragWindowController::SetDestinationDisplay(
  32     const gfx::Display& dst_display) {
  33   dst_display_ = dst_display;
  34 }
  35
  36 void DragWindowController::Show() {
  37   if (!drag_widget_)
  38     CreateDragWidget(window_->GetBoundsInScreen());
  39   drag_widget_->Show();
  40 }
  41
  42 void DragWindowController::SetBounds(const gfx::Rect& bounds) {
  43   DCHECK(drag_widget_);
  44   bounds_ = bounds;
  45   SetBoundsInternal(bounds);
  46 }
  47
  48 void DragWindowController::Hide() {
  49   if (drag_widget_) {
  50     drag_widget_->Close();
  51     drag_widget_ = NULL;
  52   }
  53   if (layer_) {
  54     views::corewm::DeepDeleteLayers(layer_);
  55     layer_ = NULL;
  56   }
  57 }
  58
  59 void DragWindowController::SetOpacity(float opacity) {
  60   DCHECK(drag_widget_);
  61   ui::Layer* layer = drag_widget_->GetNativeWindow()->layer();
  62   ui::ScopedLayerAnimationSettings scoped_setter(layer->GetAnimator());
  63   layer->SetOpacity(opacity);
  64 }
  65
  66 void DragWindowController::CreateDragWidget(const gfx::Rect& bounds) {
  67   DCHECK(!drag_widget_);
  68   drag_widget_ = new views::Widget;
  69   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
  70   params.transparent = true;
  71   params.parent = window_->parent();
  72   params.can_activate = false;
  73   params.keep_on_top = true;
  74   drag_widget_->set_focus_on_creation(false);
  75   drag_widget_->Init(params);
  76   drag_widget_->SetVisibilityChangedAnimationsEnabled(false);
  77   drag_widget_->GetNativeWindow()->SetName("DragWindow");
  78   drag_widget_->GetNativeWindow()->set_id(kShellWindowId_PhantomWindow);
  79   // Show shadow for the dragging window.
  80   SetShadowType(drag_widget_->GetNativeWindow(),
  81                 views::corewm::SHADOW_TYPE_RECTANGULAR);
  82   SetBoundsInternal(bounds);
  83   drag_widget_->StackAbove(window_);
  84
  85   RecreateWindowLayers();
  86   aura::Window* window = drag_widget_->GetNativeWindow();
  87   layer_->SetVisible(true);
  88   window->layer()->Add(layer_);
  89   window->layer()->StackAtTop(layer_);
  90
  91   // Show the widget after all the setups.
  92   drag_widget_->Show();
  93
  94   // Fade the window in.
  95   ui::Layer* widget_layer = drag_widget_->GetNativeWindow()->layer();
  96   widget_layer->SetOpacity(0);
  97   ui::ScopedLayerAnimationSettings scoped_setter(widget_layer->GetAnimator());
  98   widget_layer->SetOpacity(1);
  99 }
 100
 101 void DragWindowController::SetBoundsInternal(const gfx::Rect& bounds) {
 102   aura::Window* window = drag_widget_->GetNativeWindow();
 103   aura::client::ScreenPositionClient* screen_position_client =
 104       aura::client::GetScreenPositionClient(window->GetRootWindow());
 105   if (screen_position_client && dst_display_.is_valid())
 106     screen_position_client->SetBounds(window, bounds, dst_display_);
 107   else
 108     drag_widget_->SetBounds(bounds);
 109 }
 110
 111 void DragWindowController::RecreateWindowLayers() {
 112   DCHECK(!layer_);
 113   layer_ = views::corewm::RecreateWindowLayers(window_, true);
 114   layer_->set_delegate(window_->layer()->delegate());
 115   // Place the layer at (0, 0) of the DragWindowController's window.
 116   gfx::Rect layer_bounds = layer_->bounds();
 117   layer_bounds.set_origin(gfx::Point(0, 0));
 118   layer_->SetBounds(layer_bounds);
 119   layer_->SetVisible(false);
 120   // Detach it from the current container.
 121   layer_->parent()->Remove(layer_);
 122 }
 123
 124 }  // namespace internal
 125 }  // namespace ash