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// 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 "ash/shelf/shelf_bezel_event_filter.h"
#include "ash/shelf/shelf_layout_manager.h"
#include "ash/shell.h"
#include "ui/aura/window.h"
#include "ui/gfx/screen.h"
#include "ui/wm/core/coordinate_conversion.h"
namespace ash {
ShelfBezelEventFilter::ShelfBezelEventFilter(
ShelfLayoutManager* shelf)
: shelf_(shelf),
in_touch_drag_(false) {
Shell::GetInstance()->AddPreTargetHandler(this);
}
ShelfBezelEventFilter::~ShelfBezelEventFilter() {
Shell::GetInstance()->RemovePreTargetHandler(this);
}
void ShelfBezelEventFilter::OnGestureEvent(
ui::GestureEvent* event) {
gfx::Point point_in_screen(event->location());
aura::Window* target = static_cast<aura::Window*>(event->target());
::wm::ConvertPointToScreen(target, &point_in_screen);
gfx::Rect screen = gfx::Screen::GetScreen()
->GetDisplayNearestPoint(point_in_screen)
.bounds();
if ((!screen.Contains(point_in_screen) &&
IsShelfOnBezel(screen, point_in_screen)) ||
in_touch_drag_) {
if (gesture_handler_.ProcessGestureEvent(*event, target)) {
switch (event->type()) {
case ui::ET_GESTURE_SCROLL_BEGIN:
in_touch_drag_ = true;
break;
case ui::ET_GESTURE_SCROLL_END:
case ui::ET_SCROLL_FLING_START:
in_touch_drag_ = false;
break;
default:
break;
}
event->StopPropagation();
}
}
}
bool ShelfBezelEventFilter::IsShelfOnBezel(
const gfx::Rect& screen,
const gfx::Point& point) const{
switch (shelf_->GetAlignment()) {
case SHELF_ALIGNMENT_BOTTOM:
if (point.y() >= screen.bottom())
return true;
break;
case SHELF_ALIGNMENT_LEFT:
if (point.x() <= screen.x())
return true;
break;
case SHELF_ALIGNMENT_TOP:
if (point.y() <= screen.y())
return true;
break;
case SHELF_ALIGNMENT_RIGHT:
if (point.x() >= screen.right())
return true;
break;
}
return false;
}
} // namespace ash
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