ui/base/touch/touch_device_win.cc - Issue 563853002: Speculative fix for MaxTouchPoints returning incorrect value on Windows.

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Side by Side Diff: ui/base/touch/touch_device_win.cc

Issue 563853002: Speculative fix for MaxTouchPoints returning incorrect value on Windows. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 6 years, 3 months ago

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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.	1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be	2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.	3 // found in the LICENSE file.

4	4

5 #include "ui/base/touch/touch_device.h"	5 #include "ui/base/touch/touch_device.h"

6 #include "base/win/windows_version.h"	6 #include "base/win/windows_version.h"

7 #include <windows.h>	7 #include <windows.h>

8	8

9 namespace ui {	9 namespace ui {

10	10

11 bool IsTouchDevicePresent() {	11 bool IsTouchDevicePresent() {

12 int value = GetSystemMetrics(SM_DIGITIZER);	12 int value = GetSystemMetrics(SM_DIGITIZER);

13 return (value & NID_READY) &&	13 return (value & NID_READY) &&

14 ((value & NID_INTEGRATED_TOUCH) \|\| (value & NID_EXTERNAL_TOUCH));	14 ((value & NID_INTEGRATED_TOUCH) \|\| (value & NID_EXTERNAL_TOUCH));

15 }	15 }

16	16

17 int MaxTouchPoints() {	17 int MaxTouchPoints() {

	18 if (!IsTouchDevicePresent())

	19 return 0;

	20

18 return GetSystemMetrics(SM_MAXIMUMTOUCHES);	21 return GetSystemMetrics(SM_MAXIMUMTOUCHES);

19 }	22 }

20	23

21 } // namespace ui	24 } // namespace ui

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