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