| // Copyright (c) 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 "ash/display/event_transformation_handler.h" |
| |
| #include <cmath> |
| |
| #include "ash/display/display_info.h" |
| #include "ash/display/display_manager.h" |
| #include "ash/shell.h" |
| #include "ash/wm/window_util.h" |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_event_dispatcher.h" |
| #include "ui/compositor/dip_util.h" |
| #include "ui/events/event.h" |
| #include "ui/gfx/display.h" |
| #include "ui/gfx/screen.h" |
| #include "ui/wm/core/coordinate_conversion.h" |
| |
| namespace ash { |
| namespace { |
| |
| // Boost factor for non-integrated displays. |
| const float kBoostForNonIntegrated = 1.20f; |
| |
| } // namespace |
| |
| EventTransformationHandler::EventTransformationHandler() |
| : transformation_mode_(TRANSFORM_AUTO) { |
| } |
| |
| EventTransformationHandler::~EventTransformationHandler() { |
| } |
| |
| void EventTransformationHandler::OnScrollEvent(ui::ScrollEvent* event) { |
| if (transformation_mode_ == TRANSFORM_NONE) |
| return; |
| |
| // It is unnecessary to scale the event for the device scale factor since |
| // the event locations etc. are already in DIP. |
| gfx::Point point_in_screen(event->location()); |
| aura::Window* target = static_cast<aura::Window*>(event->target()); |
| ::wm::ConvertPointToScreen(target, &point_in_screen); |
| const gfx::Display& display = |
| Shell::GetScreen()->GetDisplayNearestPoint(point_in_screen); |
| |
| // Apply some additional scaling if the display is non-integrated. |
| if (!display.IsInternal()) |
| event->Scale(kBoostForNonIntegrated); |
| } |
| |
| } // namespace ash |