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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/events/event.h"
#include "ui/gfx/screen.h"
namespace ash {
namespace internal {
namespace {
// Creates a window for capturing drag events.
aura::Window* CreateCaptureWindow(aura::RootWindow* context_root,
aura::WindowDelegate* delegate) {
aura::Window* window = new aura::Window(delegate);
window->SetType(aura::client::WINDOW_TYPE_NORMAL);
window->Init(ui::LAYER_NOT_DRAWN);
window->SetDefaultParentByRootWindow(context_root, gfx::Rect());
window->Show();
DCHECK(window->bounds().size().IsEmpty());
return window;
}
} // namespace
DragDropTracker::DragDropTracker(aura::RootWindow* context_root,
aura::WindowDelegate* delegate)
: capture_window_(CreateCaptureWindow(context_root, delegate)) {
}
DragDropTracker::~DragDropTracker() {
capture_window_->ReleaseCapture();
}
void DragDropTracker::TakeCapture() {
capture_window_->SetCapture();
}
aura::Window* DragDropTracker::GetTarget(const ui::LocatedEvent& event) {
DCHECK(capture_window_.get());
gfx::Point location_in_screen = event.location();
wm::ConvertPointToScreen(capture_window_.get(),
&location_in_screen);
aura::RootWindow* root_window_at_point =
wm::GetRootWindowAt(location_in_screen);
gfx::Point location_in_root = location_in_screen;
wm::ConvertPointFromScreen(root_window_at_point, &location_in_root);
return root_window_at_point->GetEventHandlerForPoint(location_in_root);
}
ui::LocatedEvent* DragDropTracker::ConvertEvent(
aura::Window* target,
const ui::LocatedEvent& event) {
DCHECK(capture_window_.get());
gfx::Point target_location = event.location();
aura::Window::ConvertPointToTarget(capture_window_.get(), target,
&target_location);
gfx::Point location_in_screen = event.location();
ash::wm::ConvertPointToScreen(capture_window_.get(), &location_in_screen);
gfx::Point target_root_location = event.root_location();
aura::Window::ConvertPointToTarget(
capture_window_->GetRootWindow(),
ash::wm::GetRootWindowAt(location_in_screen),
&target_root_location);
return new ui::MouseEvent(event.type(),
target_location,
target_root_location,
event.flags());
}
} // namespace internal
} // namespace ash
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