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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 "ui/base/touch/touch_device.h"
#include "base/logging.h"
#include "base/win/windows_version.h"
#include <windows.h>
namespace ui {
bool IsTouchDevicePresent() {
int value = GetSystemMetrics(SM_DIGITIZER);
return (value & NID_READY) &&
((value & NID_INTEGRATED_TOUCH) || (value & NID_EXTERNAL_TOUCH));
}
int MaxTouchPoints() {
if (!IsTouchDevicePresent())
return 0;
return GetSystemMetrics(SM_MAXIMUMTOUCHES);
}
int GetAvailablePointerTypes() {
int available_pointer_types = 0;
if (IsTouchDevicePresent())
available_pointer_types |= POINTER_TYPE_COARSE;
if (GetSystemMetrics(SM_MOUSEPRESENT) != 0 &&
GetSystemMetrics(SM_CMOUSEBUTTONS) > 0)
available_pointer_types |= POINTER_TYPE_FINE;
if (available_pointer_types == 0)
available_pointer_types = POINTER_TYPE_NONE;
return available_pointer_types;
}
PointerType GetPrimaryPointerType() {
int available_pointer_types = GetAvailablePointerTypes();
if (available_pointer_types & POINTER_TYPE_FINE)
return POINTER_TYPE_FINE;
if (available_pointer_types & POINTER_TYPE_COARSE)
return POINTER_TYPE_COARSE;
DCHECK_EQ(available_pointer_types, POINTER_TYPE_NONE);
return POINTER_TYPE_NONE;
}
int GetAvailableHoverTypes() {
int available_hover_types = 0;
if (IsTouchDevicePresent())
available_hover_types |= HOVER_TYPE_ON_DEMAND;
if (GetSystemMetrics(SM_MOUSEPRESENT) != 0)
available_hover_types |= HOVER_TYPE_HOVER;
if (available_hover_types == 0)
available_hover_types = HOVER_TYPE_NONE;
return available_hover_types;
}
HoverType GetPrimaryHoverType() {
int available_hover_types = GetAvailableHoverTypes();
if (available_hover_types & HOVER_TYPE_HOVER)
return HOVER_TYPE_HOVER;
if (available_hover_types & HOVER_TYPE_ON_DEMAND)
return HOVER_TYPE_ON_DEMAND;
DCHECK_EQ(available_hover_types, HOVER_TYPE_NONE);
return HOVER_TYPE_NONE;
}
} // namespace ui
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