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/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
  20 namespace ash {
  21
  22 DragWindowController::DragWindowController(aura::Window* window)
  23     : window_(window),
  24       drag_widget_(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   layer_owner_.reset();
  54 }
  55
  56 void 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
  63 void 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.can_activate = false;
  70   params.keep_on_top = true;
  71   drag_widget_->set_focus_on_creation(false);
  72   drag_widget_->Init(params);
  73   drag_widget_->SetVisibilityChangedAnimationsEnabled(false);
  74   drag_widget_->GetNativeWindow()->SetName("DragWindow");
  75   drag_widget_->GetNativeWindow()->set_id(kShellWindowId_PhantomWindow);
  76   // Show shadow for the dragging window.
  77   SetShadowType(drag_widget_->GetNativeWindow(),
  78                 ::wm::SHADOW_TYPE_RECTANGULAR);
  79   SetBoundsInternal(bounds);
  80   drag_widget_->StackAbove(window_);
  81
  82   RecreateWindowLayers();
  83   aura::Window* window = drag_widget_->GetNativeWindow();
  84   layer_owner_->root()->SetVisible(true);
  85   window->layer()->Add(layer_owner_->root());
  86   window->layer()->StackAtTop(layer_owner_->root());
  87
  88   // Show the widget after all the setups.
  89   drag_widget_->Show();
  90
  91   // Fade the window in.
  92   ui::Layer* widget_layer = drag_widget_->GetNativeWindow()->layer();
  93   widget_layer->SetOpacity(0);
  94   ui::ScopedLayerAnimationSettings scoped_setter(widget_layer->GetAnimator());
  95   widget_layer->SetOpacity(1);
  96 }
  97
  98 void DragWindowController::SetBoundsInternal(const gfx::Rect& bounds) {
  99   aura::Window* window = drag_widget_->GetNativeWindow();
 100   aura::client::ScreenPositionClient* screen_position_client =
 101       aura::client::GetScreenPositionClient(window->GetRootWindow());
 102   if (screen_position_client && dst_display_.is_valid())
 103     screen_position_client->SetBounds(window, bounds, dst_display_);
 104   else
 105     drag_widget_->SetBounds(bounds);
 106 }
 107
 108 void DragWindowController::RecreateWindowLayers() {
 109   DCHECK(!layer_owner_.get());
 110   layer_owner_ = ::wm::RecreateLayers(window_);
 111   layer_owner_->root()->set_delegate(window_->layer()->delegate());
 112   // Place the layer at (0, 0) of the DragWindowController's window.
 113   gfx::Rect layer_bounds = layer_owner_->root()->bounds();
 114   layer_bounds.set_origin(gfx::Point(0, 0));
 115   layer_owner_->root()->SetBounds(layer_bounds);
 116   layer_owner_->root()->SetVisible(false);
 117   // Detach it from the current container.
 118   layer_owner_->root()->parent()->Remove(layer_owner_->root());
 119 }
 120
 121 }  // namespace ash