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| 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/button_dropdown.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/compiler_specific.h" | |
| 9 #include "base/message_loop/message_loop.h" | |
| 10 #include "base/strings/utf_string_conversions.h" | |
| 11 #include "grit/ui_strings.h" | |
| 12 #include "ui/base/accessibility/accessible_view_state.h" | |
| 13 #include "ui/base/l10n/l10n_util.h" | |
| 14 #include "ui/base/models/menu_model.h" | |
| 15 #include "ui/gfx/display.h" | |
| 16 #include "ui/gfx/screen.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 | |
| 22 // static | |
| 23 const char ButtonDropDown::kViewClassName[] = | |
| 24 "ui/views/controls/button/ButtonDropDown"; | |
| 25 | |
| 26 // How long to wait before showing the menu. | |
| 27 const int kMenuTimerDelay = 500; | |
| 28 | |
| 29 //////////////////////////////////////////////////////////////////////////////// | |
| 30 // | |
| 31 // ButtonDropDown - constructors, destructors, initialization, cleanup | |
| 32 // | |
| 33 //////////////////////////////////////////////////////////////////////////////// | |
| 34 | |
| 35 ButtonDropDown::ButtonDropDown(views::ButtonListener* listener, | |
| 36 ui::MenuModel* model) | |
| 37 : views::ImageButton(listener), | |
| 38 model_(model), | |
| 39 menu_showing_(false), | |
| 40 y_position_on_lbuttondown_(0), | |
| 41 show_menu_factory_(this) { | |
| 42 set_context_menu_controller(this); | |
| 43 } | |
| 44 | |
| 45 ButtonDropDown::~ButtonDropDown() { | |
| 46 } | |
| 47 | |
| 48 void ButtonDropDown::ClearPendingMenu() { | |
| 49 show_menu_factory_.InvalidateWeakPtrs(); | |
| 50 } | |
| 51 | |
| 52 bool ButtonDropDown::IsMenuShowing() const { | |
| 53 return menu_showing_; | |
| 54 } | |
| 55 | |
| 56 //////////////////////////////////////////////////////////////////////////////// | |
| 57 // | |
| 58 // ButtonDropDown - Events | |
| 59 // | |
| 60 //////////////////////////////////////////////////////////////////////////////// | |
| 61 | |
| 62 bool ButtonDropDown::OnMousePressed(const ui::MouseEvent& event) { | |
| 63 if (enabled() && ShouldShowMenu() && | |
| 64 IsTriggerableEvent(event) && HitTestPoint(event.location())) { | |
| 65 // Store the y pos of the mouse coordinates so we can use them later to | |
| 66 // determine if the user dragged the mouse down (which should pop up the | |
| 67 // drag down menu immediately, instead of waiting for the timer) | |
| 68 y_position_on_lbuttondown_ = event.y(); | |
| 69 | |
| 70 // Schedule a task that will show the menu. | |
| 71 base::MessageLoop::current()->PostDelayedTask( | |
| 72 FROM_HERE, | |
| 73 base::Bind(&ButtonDropDown::ShowDropDownMenu, | |
| 74 show_menu_factory_.GetWeakPtr(), | |
| 75 ui::GetMenuSourceTypeForEvent(event)), | |
| 76 base::TimeDelta::FromMilliseconds(kMenuTimerDelay)); | |
| 77 } | |
| 78 return ImageButton::OnMousePressed(event); | |
| 79 } | |
| 80 | |
| 81 bool ButtonDropDown::OnMouseDragged(const ui::MouseEvent& event) { | |
| 82 bool result = views::ImageButton::OnMouseDragged(event); | |
| 83 | |
| 84 if (show_menu_factory_.HasWeakPtrs()) { | |
| 85 // If the mouse is dragged to a y position lower than where it was when | |
| 86 // clicked then we should not wait for the menu to appear but show | |
| 87 // it immediately. | |
| 88 if (event.y() > y_position_on_lbuttondown_ + GetHorizontalDragThreshold()) { | |
| 89 show_menu_factory_.InvalidateWeakPtrs(); | |
| 90 ShowDropDownMenu(ui::GetMenuSourceTypeForEvent(event)); | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 return result; | |
| 95 } | |
| 96 | |
| 97 void ButtonDropDown::OnMouseReleased(const ui::MouseEvent& event) { | |
| 98 if (IsTriggerableEvent(event) || | |
| 99 (event.IsRightMouseButton() && !HitTestPoint(event.location()))) { | |
| 100 views::ImageButton::OnMouseReleased(event); | |
| 101 } | |
| 102 | |
| 103 if (IsTriggerableEvent(event)) | |
| 104 show_menu_factory_.InvalidateWeakPtrs(); | |
| 105 } | |
| 106 | |
| 107 const char* ButtonDropDown::GetClassName() const { | |
| 108 return kViewClassName; | |
| 109 } | |
| 110 | |
| 111 void ButtonDropDown::OnMouseExited(const ui::MouseEvent& event) { | |
| 112 // Starting a drag results in a MouseExited, we need to ignore it. | |
| 113 // A right click release triggers an exit event. We want to | |
| 114 // remain in a PUSHED state until the drop down menu closes. | |
| 115 if (state_ != STATE_DISABLED && !InDrag() && state_ != STATE_PRESSED) | |
| 116 SetState(STATE_NORMAL); | |
| 117 } | |
| 118 | |
| 119 void ButtonDropDown::OnGestureEvent(ui::GestureEvent* event) { | |
| 120 if (menu_showing_) { | |
| 121 // While dropdown menu is showing the button should not handle gestures. | |
| 122 event->StopPropagation(); | |
| 123 return; | |
| 124 } | |
| 125 | |
| 126 ImageButton::OnGestureEvent(event); | |
| 127 } | |
| 128 | |
| 129 void ButtonDropDown::GetAccessibleState(ui::AccessibleViewState* state) { | |
| 130 views::CustomButton::GetAccessibleState(state); | |
| 131 state->role = ui::AccessibilityTypes::ROLE_BUTTONDROPDOWN; | |
| 132 state->default_action = l10n_util::GetStringUTF16(IDS_APP_ACCACTION_PRESS); | |
| 133 state->state = ui::AccessibilityTypes::STATE_HASPOPUP; | |
| 134 } | |
| 135 | |
| 136 void ButtonDropDown::ShowContextMenuForView(View* source, | |
| 137 const gfx::Point& point, | |
| 138 ui::MenuSourceType source_type) { | |
| 139 if (!enabled()) | |
| 140 return; | |
| 141 | |
| 142 show_menu_factory_.InvalidateWeakPtrs(); | |
| 143 ShowDropDownMenu(source_type); | |
| 144 } | |
| 145 | |
| 146 bool ButtonDropDown::ShouldEnterPushedState(const ui::Event& event) { | |
| 147 // Enter PUSHED state on press with Left or Right mouse button or on taps. | |
| 148 // Remain in this state while the context menu is open. | |
| 149 return event.type() == ui::ET_GESTURE_TAP || | |
| 150 event.type() == ui::ET_GESTURE_TAP_DOWN || | |
| 151 (event.IsMouseEvent() && ((ui::EF_LEFT_MOUSE_BUTTON | | |
| 152 ui::EF_RIGHT_MOUSE_BUTTON) & event.flags()) != 0); | |
| 153 } | |
| 154 | |
| 155 bool ButtonDropDown::ShouldShowMenu() { | |
| 156 return true; | |
| 157 } | |
| 158 | |
| 159 void ButtonDropDown::ShowDropDownMenu(ui::MenuSourceType source_type) { | |
| 160 if (!ShouldShowMenu()) | |
| 161 return; | |
| 162 | |
| 163 gfx::Rect lb = GetLocalBounds(); | |
| 164 | |
| 165 // Both the menu position and the menu anchor type change if the UI layout | |
| 166 // is right-to-left. | |
| 167 gfx::Point menu_position(lb.origin()); | |
| 168 menu_position.Offset(0, lb.height() - 1); | |
| 169 if (base::i18n::IsRTL()) | |
| 170 menu_position.Offset(lb.width() - 1, 0); | |
| 171 | |
| 172 View::ConvertPointToScreen(this, &menu_position); | |
| 173 | |
| 174 #if defined(OS_WIN) | |
| 175 int left_bound = GetSystemMetrics(SM_XVIRTUALSCREEN); | |
| 176 #elif defined(OS_CHROMEOS) | |
| 177 // A window won't overlap between displays on ChromeOS. | |
| 178 // Use the left bound of the display on which | |
| 179 // the menu button exists. | |
| 180 gfx::NativeView view = GetWidget()->GetNativeView(); | |
| 181 gfx::Display display = gfx::Screen::GetScreenFor( | |
| 182 view)->GetDisplayNearestWindow(view); | |
| 183 int left_bound = display.bounds().x(); | |
| 184 #else | |
| 185 int left_bound = 0; | |
| 186 NOTIMPLEMENTED(); | |
| 187 #endif | |
| 188 if (menu_position.x() < left_bound) | |
| 189 menu_position.set_x(left_bound); | |
| 190 | |
| 191 // Make the button look depressed while the menu is open. | |
| 192 SetState(STATE_PRESSED); | |
| 193 | |
| 194 menu_showing_ = true; | |
| 195 | |
| 196 // Create and run menu. Display an empty menu if model is NULL. | |
| 197 if (model_.get()) { | |
| 198 views::MenuModelAdapter menu_delegate(model_.get()); | |
| 199 menu_delegate.set_triggerable_event_flags(triggerable_event_flags()); | |
| 200 menu_runner_.reset(new views::MenuRunner(menu_delegate.CreateMenu())); | |
| 201 views::MenuRunner::RunResult result = | |
| 202 menu_runner_->RunMenuAt(GetWidget(), NULL, | |
| 203 gfx::Rect(menu_position, gfx::Size(0, 0)), | |
| 204 views::MenuItemView::TOPLEFT, | |
| 205 source_type, | |
| 206 views::MenuRunner::HAS_MNEMONICS); | |
| 207 if (result == views::MenuRunner::MENU_DELETED) | |
| 208 return; | |
| 209 } else { | |
| 210 views::MenuDelegate menu_delegate; | |
| 211 views::MenuItemView* menu = new views::MenuItemView(&menu_delegate); | |
| 212 menu_runner_.reset(new views::MenuRunner(menu)); | |
| 213 views::MenuRunner::RunResult result = | |
| 214 menu_runner_->RunMenuAt(GetWidget(), NULL, | |
| 215 gfx::Rect(menu_position, gfx::Size(0, 0)), | |
| 216 views::MenuItemView::TOPLEFT, | |
| 217 source_type, | |
| 218 views::MenuRunner::HAS_MNEMONICS); | |
| 219 if (result == views::MenuRunner::MENU_DELETED) | |
| 220 return; | |
| 221 } | |
| 222 | |
| 223 menu_showing_ = false; | |
| 224 | |
| 225 // Need to explicitly clear mouse handler so that events get sent | |
| 226 // properly after the menu finishes running. If we don't do this, then | |
| 227 // the first click to other parts of the UI is eaten. | |
| 228 SetMouseHandler(NULL); | |
| 229 | |
| 230 // Set the state back to normal after the drop down menu is closed. | |
| 231 if (state_ != STATE_DISABLED) | |
| 232 SetState(STATE_NORMAL); | |
| 233 } | |
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Chromium Code Reviews
Issue 62873007:
[Toolbar] Base toolbar button class with background images for button states (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src