[Toolbar] Base toolbar button class with background images for button states

chrome/browser/ui/views/toolbar/button_dropdown.cc

Index: chrome/browser/ui/views/toolbar/button_dropdown.cc
diff --git a/chrome/browser/ui/views/toolbar/button_dropdown.cc b/chrome/browser/ui/views/toolbar/button_dropdown.cc
deleted file mode 100644
index b4e8778c490d94a3be05e7dbfe892a5e4fa5763c..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/views/toolbar/button_dropdown.cc
+++ /dev/null
@@ -1,233 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/ui/views/toolbar/button_dropdown.h"
-
-#include "base/bind.h"
-#include "base/compiler_specific.h"
-#include "base/message_loop/message_loop.h"
-#include "base/strings/utf_string_conversions.h"
-#include "grit/ui_strings.h"
-#include "ui/base/accessibility/accessible_view_state.h"
-#include "ui/base/l10n/l10n_util.h"
-#include "ui/base/models/menu_model.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/screen.h"
-#include "ui/views/controls/menu/menu_item_view.h"
-#include "ui/views/controls/menu/menu_model_adapter.h"
-#include "ui/views/controls/menu/menu_runner.h"
-#include "ui/views/widget/widget.h"
-
-// static
-const char ButtonDropDown::kViewClassName[] =
-    "ui/views/controls/button/ButtonDropDown";
-
-// How long to wait before showing the menu.
-const int kMenuTimerDelay = 500;
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// ButtonDropDown - constructors, destructors, initialization, cleanup
-//
-////////////////////////////////////////////////////////////////////////////////
-
-ButtonDropDown::ButtonDropDown(views::ButtonListener* listener,
-                               ui::MenuModel* model)
-    : views::ImageButton(listener),
-      model_(model),
-      menu_showing_(false),
-      y_position_on_lbuttondown_(0),
-      show_menu_factory_(this) {
-  set_context_menu_controller(this);
-}
-
-ButtonDropDown::~ButtonDropDown() {
-}
-
-void ButtonDropDown::ClearPendingMenu() {
-  show_menu_factory_.InvalidateWeakPtrs();
-}
-
-bool ButtonDropDown::IsMenuShowing() const {
-  return menu_showing_;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// ButtonDropDown - Events
-//
-////////////////////////////////////////////////////////////////////////////////
-
-bool ButtonDropDown::OnMousePressed(const ui::MouseEvent& event) {
-  if (enabled() && ShouldShowMenu() &&
-      IsTriggerableEvent(event) && HitTestPoint(event.location())) {
-    // Store the y pos of the mouse coordinates so we can use them later to
-    // determine if the user dragged the mouse down (which should pop up the
-    // drag down menu immediately, instead of waiting for the timer)
-    y_position_on_lbuttondown_ = event.y();
-
-    // Schedule a task that will show the menu.
-    base::MessageLoop::current()->PostDelayedTask(
-        FROM_HERE,
-        base::Bind(&ButtonDropDown::ShowDropDownMenu,
-                   show_menu_factory_.GetWeakPtr(),
-                   ui::GetMenuSourceTypeForEvent(event)),
-        base::TimeDelta::FromMilliseconds(kMenuTimerDelay));
-  }
-  return ImageButton::OnMousePressed(event);
-}
-
-bool ButtonDropDown::OnMouseDragged(const ui::MouseEvent& event) {
-  bool result = views::ImageButton::OnMouseDragged(event);
-
-  if (show_menu_factory_.HasWeakPtrs()) {
-    // If the mouse is dragged to a y position lower than where it was when
-    // clicked then we should not wait for the menu to appear but show
-    // it immediately.
-    if (event.y() > y_position_on_lbuttondown_ + GetHorizontalDragThreshold()) {
-      show_menu_factory_.InvalidateWeakPtrs();
-      ShowDropDownMenu(ui::GetMenuSourceTypeForEvent(event));
-    }
-  }
-
-  return result;
-}
-
-void ButtonDropDown::OnMouseReleased(const ui::MouseEvent& event) {
-  if (IsTriggerableEvent(event) ||
-      (event.IsRightMouseButton() && !HitTestPoint(event.location()))) {
-    views::ImageButton::OnMouseReleased(event);
-  }
-
-  if (IsTriggerableEvent(event))
-    show_menu_factory_.InvalidateWeakPtrs();
-}
-
-const char* ButtonDropDown::GetClassName() const {
-  return kViewClassName;
-}
-
-void ButtonDropDown::OnMouseExited(const ui::MouseEvent& event) {
-  // Starting a drag results in a MouseExited, we need to ignore it.
-  // A right click release triggers an exit event. We want to
-  // remain in a PUSHED state until the drop down menu closes.
-  if (state_ != STATE_DISABLED && !InDrag() && state_ != STATE_PRESSED)
-    SetState(STATE_NORMAL);
-}
-
-void ButtonDropDown::OnGestureEvent(ui::GestureEvent* event) {
-  if (menu_showing_) {
-    // While dropdown menu is showing the button should not handle gestures.
-    event->StopPropagation();
-    return;
-  }
-
-  ImageButton::OnGestureEvent(event);
-}
-
-void ButtonDropDown::GetAccessibleState(ui::AccessibleViewState* state) {
-  views::CustomButton::GetAccessibleState(state);
-  state->role = ui::AccessibilityTypes::ROLE_BUTTONDROPDOWN;
-  state->default_action = l10n_util::GetStringUTF16(IDS_APP_ACCACTION_PRESS);
-  state->state = ui::AccessibilityTypes::STATE_HASPOPUP;
-}
-
-void ButtonDropDown::ShowContextMenuForView(View* source,
-                                            const gfx::Point& point,
-                                            ui::MenuSourceType source_type) {
-  if (!enabled())
-    return;
-
-  show_menu_factory_.InvalidateWeakPtrs();
-  ShowDropDownMenu(source_type);
-}
-
-bool ButtonDropDown::ShouldEnterPushedState(const ui::Event& event) {
-  // Enter PUSHED state on press with Left or Right mouse button or on taps.
-  // Remain in this state while the context menu is open.
-  return event.type() == ui::ET_GESTURE_TAP ||
-         event.type() == ui::ET_GESTURE_TAP_DOWN ||
-         (event.IsMouseEvent() && ((ui::EF_LEFT_MOUSE_BUTTON |
-             ui::EF_RIGHT_MOUSE_BUTTON) & event.flags()) != 0);
-}
-
-bool ButtonDropDown::ShouldShowMenu() {
-  return true;
-}
-
-void ButtonDropDown::ShowDropDownMenu(ui::MenuSourceType source_type) {
-  if (!ShouldShowMenu())
-    return;
-
-  gfx::Rect lb = GetLocalBounds();
-
-  // Both the menu position and the menu anchor type change if the UI layout
-  // is right-to-left.
-  gfx::Point menu_position(lb.origin());
-  menu_position.Offset(0, lb.height() - 1);
-  if (base::i18n::IsRTL())
-    menu_position.Offset(lb.width() - 1, 0);
-
-  View::ConvertPointToScreen(this, &menu_position);
-
-#if defined(OS_WIN)
-  int left_bound = GetSystemMetrics(SM_XVIRTUALSCREEN);
-#elif defined(OS_CHROMEOS)
-  // A window won't overlap between displays on ChromeOS.
-  // Use the left bound of the display on which
-  // the menu button exists.
-  gfx::NativeView view = GetWidget()->GetNativeView();
-  gfx::Display display = gfx::Screen::GetScreenFor(
-      view)->GetDisplayNearestWindow(view);
-  int left_bound = display.bounds().x();
-#else
-  int left_bound = 0;
-  NOTIMPLEMENTED();
-#endif
-  if (menu_position.x() < left_bound)
-    menu_position.set_x(left_bound);
-
-  // Make the button look depressed while the menu is open.
-  SetState(STATE_PRESSED);
-
-  menu_showing_ = true;
-
-  // Create and run menu.  Display an empty menu if model is NULL.
-  if (model_.get()) {
-    views::MenuModelAdapter menu_delegate(model_.get());
-    menu_delegate.set_triggerable_event_flags(triggerable_event_flags());
-    menu_runner_.reset(new views::MenuRunner(menu_delegate.CreateMenu()));
-    views::MenuRunner::RunResult result =
-        menu_runner_->RunMenuAt(GetWidget(), NULL,
-                                gfx::Rect(menu_position, gfx::Size(0, 0)),
-                                views::MenuItemView::TOPLEFT,
-                                source_type,
-                                views::MenuRunner::HAS_MNEMONICS);
-    if (result == views::MenuRunner::MENU_DELETED)
-      return;
-  } else {
-    views::MenuDelegate menu_delegate;
-    views::MenuItemView* menu = new views::MenuItemView(&menu_delegate);
-    menu_runner_.reset(new views::MenuRunner(menu));
-    views::MenuRunner::RunResult result =
-        menu_runner_->RunMenuAt(GetWidget(), NULL,
-                                gfx::Rect(menu_position, gfx::Size(0, 0)),
-                                views::MenuItemView::TOPLEFT,
-                                source_type,
-                                views::MenuRunner::HAS_MNEMONICS);
-    if (result == views::MenuRunner::MENU_DELETED)
-      return;
-  }
-
-  menu_showing_ = false;
-
-  // Need to explicitly clear mouse handler so that events get sent
-  // properly after the menu finishes running. If we don't do this, then
-  // the first click to other parts of the UI is eaten.
-  SetMouseHandler(NULL);
-
-  // Set the state back to normal after the drop down menu is closed.
-  if (state_ != STATE_DISABLED)
-    SetState(STATE_NORMAL);
-}