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// Copyright (c) 2012 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/drag_drop/drag_drop_tracker.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/coordinate_conversion.h"
#include "ui/aura/root_window.h"
#include "ui/base/events/event.h"
#include "ui/gfx/screen.h"
namespace {
// Creates a window for capturing drag events.
aura::Window* CreateCaptureWindow(aura::RootWindow* root_window) {
aura::Window* window = new aura::Window(NULL);
window->SetType(aura::client::WINDOW_TYPE_NORMAL);
window->Init(ui::LAYER_NOT_DRAWN);
window->SetParent(NULL);
window->SetBoundsInScreen(root_window->GetBoundsInScreen(),
gfx::Screen::GetDisplayNearestWindow(root_window));
window->Show();
return window;
}
} // namespace
namespace ash {
namespace internal {
DragDropTracker::DragDropTracker(aura::RootWindow* root_window)
: capture_window_(CreateCaptureWindow(root_window)) {
capture_window_->SetCapture();
}
DragDropTracker::~DragDropTracker() {
capture_window_->ReleaseCapture();
}
aura::Window* DragDropTracker::GetTarget(const ui::LocatedEvent& event) {
std::pair<aura::RootWindow*, gfx::Point> pair =
ash::wm::GetRootWindowRelativeToWindow(capture_window_.get(),
event.location());
return pair.first->GetEventHandlerForPoint(pair.second);
}
ui::MouseEvent* DragDropTracker::ConvertMouseEvent(
aura::Window* target,
const ui::MouseEvent& event) {
DCHECK(capture_window_.get());
std::pair<aura::RootWindow*, gfx::Point> location_pair =
ash::wm::GetRootWindowRelativeToWindow(capture_window_.get(),
event.location());
aura::Window::ConvertPointToTarget(location_pair.first, target,
&location_pair.second);
std::pair<aura::RootWindow*, gfx::Point> root_location_pair =
ash::wm::GetRootWindowRelativeToWindow(capture_window_->GetRootWindow(),
event.root_location());
return new ui::MouseEvent(event.type(),
location_pair.second,
root_location_pair.second,
event.flags());
}
} // namespace internal
} // namespace ash
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