X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Finput%2Fwindows%2Ftouchscreen.cpp;h=d6e76e023c44174fa89eecb730130c64adf13fa6;hb=2310eed6d8a73af7dd380eefb3ee7a30d277909a;hp=180f1c04f568816bb9fc8de1ce7ed383c156173e;hpb=1d7113259625a91f5f6d2f53365aad22ae744689;p=libs%2Fgui.git

diff --git a/source/input/windows/touchscreen.cpp b/source/input/windows/touchscreen.cpp
index 180f1c0..d6e76e0 100644
--- a/source/input/windows/touchscreen.cpp
+++ b/source/input/windows/touchscreen.cpp
@@ -8,6 +8,28 @@ using namespace std;
 namespace Msp {
 namespace Input {
 
+bool Touchscreen::is_available()
+{
+	// Must have at least Windows 7 (WinNT 6.1) for WM_TOUCHMOVE
+	OSVERSIONINFOEX version;
+	version.dwOSVersionInfoSize = sizeof(version);
+	version.dwMajorVersion = 6;
+	version.dwMinorVersion = 1;
+	version.wServicePackMajor = 0;
+	version.wServicePackMinor = 0;
+	DWORD mask = VER_MAJORVERSION|VER_MINORVERSION|VER_SERVICEPACKMAJOR|VER_SERVICEPACKMINOR;
+	DWORDLONG cond = VerSetConditionMask(0, mask, VER_GREATER_EQUAL);
+	if(VerifyVersionInfo(&version, mask, cond))
+		return false;
+
+	if(!GetSystemMetrics(SM_TABLETPC))
+		return false;
+	if(!(GetSystemMetrics(SM_DIGITIZER)&NID_READY))
+		return false;
+
+	return true;
+}
+
 void Touchscreen::input_event(const Graphics::Window::Event &event)
 {
 	if(event.msg==WM_TOUCHMOVE)