1// Copyright 2013 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 "chrome/browser/ui/views/toolbar/toolbar_button.h" 6 7#include "base/bind.h" 8#include "chrome/browser/ui/views/location_bar/location_bar_view.h" 9#include "ui/accessibility/ax_view_state.h" 10#include "ui/base/l10n/l10n_util.h" 11#include "ui/base/models/menu_model.h" 12#include "ui/base/theme_provider.h" 13#include "ui/gfx/display.h" 14#include "ui/gfx/screen.h" 15#include "ui/strings/grit/ui_strings.h" 16#include "ui/views/controls/button/label_button_border.h" 17#include "ui/views/controls/menu/menu_item_view.h" 18#include "ui/views/controls/menu/menu_model_adapter.h" 19#include "ui/views/controls/menu/menu_runner.h" 20#include "ui/views/widget/widget.h" 21 22ToolbarButton::ToolbarButton(views::ButtonListener* listener, 23 ui::MenuModel* model) 24 : views::LabelButton(listener, base::string16()), 25 model_(model), 26 menu_showing_(false), 27 y_position_on_lbuttondown_(0), 28 show_menu_factory_(this) { 29 set_context_menu_controller(this); 30} 31 32ToolbarButton::~ToolbarButton() { 33} 34 35void ToolbarButton::Init() { 36 SetFocusable(false); 37 SetAccessibilityFocusable(true); 38 image()->EnableCanvasFlippingForRTLUI(true); 39} 40 41void ToolbarButton::ClearPendingMenu() { 42 show_menu_factory_.InvalidateWeakPtrs(); 43} 44 45bool ToolbarButton::IsMenuShowing() const { 46 return menu_showing_; 47} 48 49gfx::Size ToolbarButton::GetPreferredSize() const { 50 gfx::Size size(image()->GetPreferredSize()); 51 gfx::Size label_size = label()->GetPreferredSize(); 52 if (label_size.width() > 0) 53 size.Enlarge(label_size.width() + LocationBarView::kItemPadding, 0); 54 return size; 55} 56 57bool ToolbarButton::OnMousePressed(const ui::MouseEvent& event) { 58 if (enabled() && ShouldShowMenu() && 59 IsTriggerableEvent(event) && HitTestPoint(event.location())) { 60 // Store the y pos of the mouse coordinates so we can use them later to 61 // determine if the user dragged the mouse down (which should pop up the 62 // drag down menu immediately, instead of waiting for the timer) 63 y_position_on_lbuttondown_ = event.y(); 64 65 // Schedule a task that will show the menu. 66 const int kMenuTimerDelay = 500; 67 base::MessageLoop::current()->PostDelayedTask( 68 FROM_HERE, 69 base::Bind(&ToolbarButton::ShowDropDownMenu, 70 show_menu_factory_.GetWeakPtr(), 71 ui::GetMenuSourceTypeForEvent(event)), 72 base::TimeDelta::FromMilliseconds(kMenuTimerDelay)); 73 } 74 return LabelButton::OnMousePressed(event); 75} 76 77bool ToolbarButton::OnMouseDragged(const ui::MouseEvent& event) { 78 bool result = LabelButton::OnMouseDragged(event); 79 80 if (show_menu_factory_.HasWeakPtrs()) { 81 // If the mouse is dragged to a y position lower than where it was when 82 // clicked then we should not wait for the menu to appear but show 83 // it immediately. 84 if (event.y() > y_position_on_lbuttondown_ + GetHorizontalDragThreshold()) { 85 show_menu_factory_.InvalidateWeakPtrs(); 86 ShowDropDownMenu(ui::GetMenuSourceTypeForEvent(event)); 87 } 88 } 89 90 return result; 91} 92 93void ToolbarButton::OnMouseReleased(const ui::MouseEvent& event) { 94 if (IsTriggerableEvent(event) || 95 (event.IsRightMouseButton() && !HitTestPoint(event.location()))) { 96 LabelButton::OnMouseReleased(event); 97 } 98 99 if (IsTriggerableEvent(event)) 100 show_menu_factory_.InvalidateWeakPtrs(); 101} 102 103void ToolbarButton::OnMouseCaptureLost() { 104} 105 106void ToolbarButton::OnMouseExited(const ui::MouseEvent& event) { 107 // Starting a drag results in a MouseExited, we need to ignore it. 108 // A right click release triggers an exit event. We want to 109 // remain in a PUSHED state until the drop down menu closes. 110 if (state_ != STATE_DISABLED && !InDrag() && state_ != STATE_PRESSED) 111 SetState(STATE_NORMAL); 112} 113 114void ToolbarButton::OnGestureEvent(ui::GestureEvent* event) { 115 if (menu_showing_) { 116 // While dropdown menu is showing the button should not handle gestures. 117 event->StopPropagation(); 118 return; 119 } 120 121 LabelButton::OnGestureEvent(event); 122} 123 124void ToolbarButton::GetAccessibleState(ui::AXViewState* state) { 125 CustomButton::GetAccessibleState(state); 126 state->role = ui::AX_ROLE_BUTTON_DROP_DOWN; 127 state->default_action = l10n_util::GetStringUTF16(IDS_APP_ACCACTION_PRESS); 128 state->AddStateFlag(ui::AX_STATE_HASPOPUP); 129} 130 131scoped_ptr<views::LabelButtonBorder> 132ToolbarButton::CreateDefaultBorder() const { 133 scoped_ptr<views::LabelButtonBorder> border = 134 LabelButton::CreateDefaultBorder(); 135 136 ui::ThemeProvider* provider = GetThemeProvider(); 137 if (provider && provider->UsingSystemTheme()) { 138 // We set smaller insets here to accommodate the slightly larger GTK+ 139 // icons. 140 border->set_insets(gfx::Insets(2, 2, 2, 2)); 141 } 142 143 return border.Pass(); 144} 145 146void ToolbarButton::ShowContextMenuForView(View* source, 147 const gfx::Point& point, 148 ui::MenuSourceType source_type) { 149 if (!enabled()) 150 return; 151 152 show_menu_factory_.InvalidateWeakPtrs(); 153 ShowDropDownMenu(source_type); 154} 155 156bool ToolbarButton::ShouldEnterPushedState(const ui::Event& event) { 157 // Enter PUSHED state on press with Left or Right mouse button or on taps. 158 // Remain in this state while the context menu is open. 159 return event.type() == ui::ET_GESTURE_TAP || 160 event.type() == ui::ET_GESTURE_TAP_DOWN || 161 (event.IsMouseEvent() && ((ui::EF_LEFT_MOUSE_BUTTON | 162 ui::EF_RIGHT_MOUSE_BUTTON) & event.flags()) != 0); 163} 164 165bool ToolbarButton::ShouldShowMenu() { 166 return model_ != NULL; 167} 168 169void ToolbarButton::ShowDropDownMenu(ui::MenuSourceType source_type) { 170 if (!ShouldShowMenu()) 171 return; 172 173 gfx::Rect lb = GetLocalBounds(); 174 175 // Both the menu position and the menu anchor type change if the UI layout 176 // is right-to-left. 177 gfx::Point menu_position(lb.origin()); 178 menu_position.Offset(0, lb.height() - 1); 179 if (base::i18n::IsRTL()) 180 menu_position.Offset(lb.width() - 1, 0); 181 182 View::ConvertPointToScreen(this, &menu_position); 183 184#if defined(OS_WIN) 185 int left_bound = GetSystemMetrics(SM_XVIRTUALSCREEN); 186#elif defined(OS_CHROMEOS) 187 // A window won't overlap between displays on ChromeOS. 188 // Use the left bound of the display on which 189 // the menu button exists. 190 gfx::NativeView view = GetWidget()->GetNativeView(); 191 gfx::Display display = gfx::Screen::GetScreenFor( 192 view)->GetDisplayNearestWindow(view); 193 int left_bound = display.bounds().x(); 194#else 195 // The window might be positioned over the edge between two screens. We'll 196 // want to position the dropdown on the screen the mouse cursor is on. 197 gfx::NativeView view = GetWidget()->GetNativeView(); 198 gfx::Screen* screen = gfx::Screen::GetScreenFor(view); 199 gfx::Display display = screen->GetDisplayNearestPoint( 200 screen->GetCursorScreenPoint()); 201 int left_bound = display.bounds().x(); 202#endif 203 if (menu_position.x() < left_bound) 204 menu_position.set_x(left_bound); 205 206 // Make the button look depressed while the menu is open. 207 SetState(STATE_PRESSED); 208 209 menu_showing_ = true; 210 211 // Create and run menu. Display an empty menu if model is NULL. 212 if (model_.get()) { 213 views::MenuModelAdapter menu_delegate(model_.get()); 214 menu_delegate.set_triggerable_event_flags(triggerable_event_flags()); 215 menu_runner_.reset(new views::MenuRunner(menu_delegate.CreateMenu(), 216 views::MenuRunner::HAS_MNEMONICS)); 217 views::MenuRunner::RunResult result = 218 menu_runner_->RunMenuAt(GetWidget(), 219 NULL, 220 gfx::Rect(menu_position, gfx::Size(0, 0)), 221 views::MENU_ANCHOR_TOPLEFT, 222 source_type); 223 if (result == views::MenuRunner::MENU_DELETED) 224 return; 225 } else { 226 views::MenuDelegate menu_delegate; 227 views::MenuItemView* menu = new views::MenuItemView(&menu_delegate); 228 menu_runner_.reset( 229 new views::MenuRunner(menu, views::MenuRunner::HAS_MNEMONICS)); 230 views::MenuRunner::RunResult result = 231 menu_runner_->RunMenuAt(GetWidget(), 232 NULL, 233 gfx::Rect(menu_position, gfx::Size(0, 0)), 234 views::MENU_ANCHOR_TOPLEFT, 235 source_type); 236 if (result == views::MenuRunner::MENU_DELETED) 237 return; 238 } 239 240 menu_showing_ = false; 241 242 // Need to explicitly clear mouse handler so that events get sent 243 // properly after the menu finishes running. If we don't do this, then 244 // the first click to other parts of the UI is eaten. 245 SetMouseHandler(NULL); 246 247 // Set the state back to normal after the drop down menu is closed. 248 if (state_ != STATE_DISABLED) 249 SetState(STATE_NORMAL); 250} 251