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