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 "ui/views/controls/menu/menu_host.h" 6 7 #include "base/auto_reset.h" 8 #include "base/debug/trace_event.h" 9 #include "ui/events/gestures/gesture_recognizer.h" 10 #include "ui/gfx/path.h" 11 #include "ui/native_theme/native_theme.h" 12 #include "ui/views/controls/menu/menu_controller.h" 13 #include "ui/views/controls/menu/menu_host_root_view.h" 14 #include "ui/views/controls/menu/menu_item_view.h" 15 #include "ui/views/controls/menu/menu_scroll_view_container.h" 16 #include "ui/views/controls/menu/submenu_view.h" 17 #include "ui/views/round_rect_painter.h" 18 #include "ui/views/widget/native_widget_private.h" 19 #include "ui/views/widget/widget.h" 20 21 namespace views { 22 23 //////////////////////////////////////////////////////////////////////////////// 24 // MenuHost, public: 25 26 MenuHost::MenuHost(SubmenuView* submenu) 27 : submenu_(submenu), 28 destroying_(false), 29 ignore_capture_lost_(false) { 30 set_auto_release_capture(false); 31 } 32 33 MenuHost::~MenuHost() { 34 } 35 36 void MenuHost::InitMenuHost(Widget* parent, 37 const gfx::Rect& bounds, 38 View* contents_view, 39 bool do_capture) { 40 TRACE_EVENT0("views", "MenuHost::InitMenuHost"); 41 Widget::InitParams params(Widget::InitParams::TYPE_MENU); 42 const MenuController* menu_controller = 43 submenu_->GetMenuItem()->GetMenuController(); 44 const MenuConfig& menu_config = submenu_->GetMenuItem()->GetMenuConfig(); 45 bool rounded_border = menu_controller && menu_config.corner_radius > 0; 46 bool bubble_border = submenu_->GetScrollViewContainer() && 47 submenu_->GetScrollViewContainer()->HasBubbleBorder(); 48 params.shadow_type = bubble_border ? Widget::InitParams::SHADOW_TYPE_NONE 49 : Widget::InitParams::SHADOW_TYPE_DROP; 50 params.opacity = (bubble_border || rounded_border) ? 51 Widget::InitParams::TRANSLUCENT_WINDOW : 52 Widget::InitParams::OPAQUE_WINDOW; 53 params.parent = parent ? parent->GetNativeView() : NULL; 54 params.bounds = bounds; 55 Init(params); 56 57 SetContentsView(contents_view); 58 ShowMenuHost(do_capture); 59 } 60 61 bool MenuHost::IsMenuHostVisible() { 62 return IsVisible(); 63 } 64 65 void MenuHost::ShowMenuHost(bool do_capture) { 66 // Doing a capture may make us get capture lost. Ignore it while we're in the 67 // process of showing. 68 base::AutoReset<bool> reseter(&ignore_capture_lost_, true); 69 ShowInactive(); 70 if (do_capture) { 71 // Cancel existing touches, so we don't miss some touch release/cancel 72 // events due to the menu taking capture. 73 ui::GestureRecognizer::Get()->TransferEventsTo(NULL, NULL); 74 native_widget_private()->SetCapture(); 75 } 76 } 77 78 void MenuHost::HideMenuHost() { 79 ignore_capture_lost_ = true; 80 ReleaseMenuHostCapture(); 81 Hide(); 82 ignore_capture_lost_ = false; 83 } 84 85 void MenuHost::DestroyMenuHost() { 86 HideMenuHost(); 87 destroying_ = true; 88 static_cast<MenuHostRootView*>(GetRootView())->ClearSubmenu(); 89 Close(); 90 } 91 92 void MenuHost::SetMenuHostBounds(const gfx::Rect& bounds) { 93 SetBounds(bounds); 94 } 95 96 void MenuHost::ReleaseMenuHostCapture() { 97 if (native_widget_private()->HasCapture()) 98 native_widget_private()->ReleaseCapture(); 99 } 100 101 //////////////////////////////////////////////////////////////////////////////// 102 // MenuHost, Widget overrides: 103 104 internal::RootView* MenuHost::CreateRootView() { 105 return new MenuHostRootView(this, submenu_); 106 } 107 108 void MenuHost::OnMouseCaptureLost() { 109 if (destroying_ || ignore_capture_lost_) 110 return; 111 MenuController* menu_controller = 112 submenu_->GetMenuItem()->GetMenuController(); 113 if (menu_controller && !menu_controller->drag_in_progress()) 114 menu_controller->CancelAll(); 115 Widget::OnMouseCaptureLost(); 116 } 117 118 void MenuHost::OnNativeWidgetDestroyed() { 119 if (!destroying_) { 120 // We weren't explicitly told to destroy ourselves, which means the menu was 121 // deleted out from under us (the window we're parented to was closed). Tell 122 // the SubmenuView to drop references to us. 123 submenu_->MenuHostDestroyed(); 124 } 125 Widget::OnNativeWidgetDestroyed(); 126 } 127 128 void MenuHost::OnOwnerClosing() { 129 if (destroying_) 130 return; 131 132 MenuController* menu_controller = 133 submenu_->GetMenuItem()->GetMenuController(); 134 if (menu_controller && !menu_controller->drag_in_progress()) 135 menu_controller->CancelAll(); 136 } 137 138 void MenuHost::OnDragWillStart() { 139 MenuController* menu_controller = 140 submenu_->GetMenuItem()->GetMenuController(); 141 DCHECK(menu_controller); 142 menu_controller->OnDragWillStart(); 143 } 144 145 void MenuHost::OnDragComplete() { 146 MenuController* menu_controller = 147 submenu_->GetMenuItem()->GetMenuController(); 148 if (destroying_ || !menu_controller) 149 return; 150 151 bool should_close = true; 152 // If the view came from outside menu code (i.e., not a MenuItemView), we 153 // should consult the MenuDelegate to determine whether or not to close on 154 // exit. 155 if (!menu_controller->did_initiate_drag()) { 156 MenuDelegate* menu_delegate = submenu_->GetMenuItem()->GetDelegate(); 157 should_close = 158 menu_delegate ? menu_delegate->ShouldCloseOnDragComplete() : should_close; 159 } 160 menu_controller->OnDragComplete(should_close); 161 162 // We may have lost capture in the drag and drop, but are remaining open. 163 // Return capture so we get MouseCaptureLost events. 164 if (!should_close) 165 native_widget_private()->SetCapture(); 166 } 167 168 } // namespace views 169