ui/views/animation/button_ink_drop_delegate.cc

// Copyright 2015 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 "ui/views/animation/button_ink_drop_delegate.h"

#include "ui/events/event.h"
#include "ui/events/scoped_target_handler.h"
#include "ui/views/animation/ink_drop_animation_controller.h"
#include "ui/views/animation/ink_drop_animation_controller_factory.h"
#include "ui/views/animation/ink_drop_host.h"
#include "ui/views/animation/ink_drop_state.h"
#include "ui/views/view.h"

namespace views {

ButtonInkDropDelegate::ButtonInkDropDelegate(InkDropHost* ink_drop_host,
                                             View* view)
    : target_handler_(new ui::ScopedTargetHandler(view, this)),
      ink_drop_host_(ink_drop_host),
      ink_drop_animation_controller_(
          InkDropAnimationControllerFactory::CreateInkDropAnimationController(
              ink_drop_host_)) {}

ButtonInkDropDelegate::~ButtonInkDropDelegate() {
}

void ButtonInkDropDelegate::SetInkDropSize(int large_size,
                                           int large_corner_radius,
                                           int small_size,
                                           int small_corner_radius) {
  ink_drop_animation_controller_->SetInkDropSize(
      gfx::Size(large_size, large_size), large_corner_radius,
      gfx::Size(small_size, small_size), small_corner_radius);
}

void ButtonInkDropDelegate::OnLayout() {
  ink_drop_animation_controller_->SetInkDropCenter(
      ink_drop_host_->CalculateInkDropCenter());
}

void ButtonInkDropDelegate::OnAction(InkDropState state) {
  ink_drop_animation_controller_->AnimateToState(state);
}

////////////////////////////////////////////////////////////////////////////////
// ui::EventHandler:

void ButtonInkDropDelegate::OnGestureEvent(ui::GestureEvent* event) {
  InkDropState ink_drop_state = InkDropState::HIDDEN;
  switch (event->type()) {
    case ui::ET_GESTURE_TAP_DOWN:
      ink_drop_state = InkDropState::ACTION_PENDING;
      // The ui::ET_GESTURE_TAP_DOWN event needs to be marked as handled so that
      // subsequent events for the gesture are sent to |this|.
      event->SetHandled();
      break;
    case ui::ET_GESTURE_LONG_PRESS:
      ink_drop_state = InkDropState::SLOW_ACTION_PENDING;
      break;
    case ui::ET_GESTURE_LONG_TAP:
      ink_drop_state = InkDropState::SLOW_ACTION;
      break;
    case ui::ET_GESTURE_SCROLL_BEGIN:
    case ui::ET_GESTURE_END:
      ink_drop_state = InkDropState::HIDDEN;
      break;
    default:
      return;
  }

  InkDropState current_ink_drop_state =
      ink_drop_animation_controller_->GetInkDropState();

  if (ink_drop_state == InkDropState::HIDDEN &&
      (current_ink_drop_state == InkDropState::QUICK_ACTION ||
       current_ink_drop_state == InkDropState::SLOW_ACTION ||
       current_ink_drop_state == InkDropState::DEACTIVATED)) {
    // These InkDropStates automatically transition to the HIDDEN state so we
    // don't make an explicit call. Explicitly animating to HIDDEN in this case
    // would prematurely pre-empt these animations.
    return;
  }
  ink_drop_animation_controller_->AnimateToState(ink_drop_state);
}

}  // namespace views