/// <summary>
/// Returns extension index for given tag, if possible.
/// </summary>
/// <param name="tag_I">type of extension being searched for</param>
/// <returns></returns>
private static UInt32 FindWTXExtensionIndex(EWTXExtensionTag tag_I)
{
UInt32 thisTag = 0;
UInt32 extIndex = 0xffffffff;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(thisTag);
for (Int32 loopIdx = 0, size = -1; size != 0; loopIdx++)
{
size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_EXTENSIONS + (UInt32)loopIdx,
(uint)EWTIExtensionIndex.EXT_TAG, buf);
if (size > 0)
{
thisTag = WMemUtils.MarshalUnmanagedBuf <UInt32>(buf, size);
if ((EWTXExtensionTag)thisTag == tag_I)
{
extIndex = (UInt32)loopIdx;
break;
}
}
}
WMemUtils.FreeUnmanagedBuf(buf);
return(extIndex);
}
/// <summary>
/// Return the extension mask for the given tag.
/// </summary>
/// <param name="tag_I"></param>
/// <returns></returns>
public static UInt32 GetExtensionMask(EWTXExtensionTag tag_I)
{
UInt32 extMask = 0;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(extMask);
try {
UInt32 extIndex = FindWTXExtensionIndex(tag_I);
// Supported if extIndex != -1
if (extIndex != 0xffffffff)
{
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_EXTENSIONS + extIndex,
(uint)EWTIExtensionIndex.EXT_MASK, buf);
extMask = WMemUtils.MarshalUnmanagedBuf <UInt32>(buf, size);
}
} catch (Exception ex) {
throw new Exception("FAILED GetExtensionMask: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(extMask);
}
/// <summary>
/// Returns a string containing the name of the selected stylus.
/// </summary>
/// <param name="index_I">indicates stylus type</param>
/// <returns></returns>
public static string GetStylusName(EWTICursorNameIndex index_I)
{
string stylusName = null;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(MAX_STRING_SIZE);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)index_I,
(uint)EWTICursorsIndex.CSR_NAME, buf);
if (size < 1)
{
throw new Exception("GetStylusName returned empty string.");
}
// Strip off final null character before marshalling.
stylusName = WMemUtils.MarshalUnmanagedString(buf, size - 1);
} catch (Exception ex) {
throw new Exception("FAILED GetDeviceInfo: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(stylusName);
}
/// <summary>
/// Returns TRUE if Wintab service is running and responsive.
/// </summary>
/// <returns></returns>
public static bool IsWintabAvailable()
{
IntPtr buf = IntPtr.Zero;
bool status = false;
try {
status = (WNativeMethods.WTInfo(0, 0, buf) > 0);
} catch (Exception ex) {
throw new Exception("FAILED IsWintabAvailable: " + ex.ToString());
}
return(status);
}
/// <summary>
/// Helper function to get digitizing or system default context.
/// </summary>
/// <param name="contextType_I">Use WTI_DEFCONTEXT for digital context or WTI_DEFSYSCTX for system context</param>
/// <returns>Returns the default context or null on error.</returns>
private static WContext GetDefaultContext(EWTICategoryIndex contextIndex_I)
{
WContext context = new WContext();
IntPtr buf = WMemUtils.AllocUnmanagedBuf(context.LogContext);
try {
int size = (int)WNativeMethods.WTInfo((uint)contextIndex_I, 0, buf);
context.LogContext = WMemUtils.MarshalUnmanagedBuf <WintabLogContext>(buf, size);
} catch (Exception ex) {
throw new Exception("FAILED GetDefaultContext: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(context);
}
/// <summary>
/// Returns whether a stylus is currently connected to the active cursor.
/// </summary>
/// <returns></returns>
public static bool IsStylusActive()
{
bool isStylusActive = false;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(isStylusActive);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_INTERFACE,
(uint)EWTIInterfaceIndex.IFC_NDEVICES, buf);
isStylusActive = WMemUtils.MarshalUnmanagedBuf <bool>(buf, size);
} catch (Exception ex) {
throw new Exception("FAILED GetNumberOfDevices: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(isStylusActive);
}
/// <summary>
/// Returns the number of devices connected.
/// </summary>
/// <returns></returns>
public static UInt32 GetNumberOfDevices()
{
UInt32 numDevices = 0;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(numDevices);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_INTERFACE,
(uint)EWTIInterfaceIndex.IFC_NDEVICES, buf);
numDevices = WMemUtils.MarshalUnmanagedBuf <UInt32>(buf, size);
} catch (Exception ex) {
throw new Exception("FAILED GetNumberOfDevices: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(numDevices);
}
/// <summary>
/// Returns the default device. If this value is -1, then it also known as a "virtual device".
/// </summary>
/// <returns></returns>
public static Int32 GetDefaultDeviceIndex()
{
Int32 devIndex = 0;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(devIndex);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_DEFCONTEXT,
(uint)EWTIContextIndex.CTX_DEVICE, buf);
devIndex = WMemUtils.MarshalUnmanagedBuf <Int32>(buf, size);
} catch (Exception ex) {
throw new Exception("FAILED GetDefaultDeviceIndex: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(devIndex);
}
/// <summary>
/// Returns the WintabAxis object for specified device and dimension.
/// </summary>
/// <param name="devIndex_I">Device index (-1 = virtual device)</param>
/// <param name="dim_I">Dimension: AXIS_X, AXIS_Y or AXIS_Z</param>
/// <returns></returns>
public static WintabAxis GetDeviceAxis(Int32 devIndex_I, EAxisDimension dim_I)
{
WintabAxis axis = new WintabAxis();
IntPtr buf = WMemUtils.AllocUnmanagedBuf(axis);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)(EWTICategoryIndex.WTI_DEVICES + devIndex_I),
(uint)dim_I, buf);
// If size == 0, then returns a zeroed struct.
axis = WMemUtils.MarshalUnmanagedBuf <WintabAxis>(buf, size);
} catch (Exception ex) {
throw new Exception("FAILED GetDeviceAxis: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(axis);
}
/// <summary>
/// Return max normal pressure supported by tablet.
/// </summary>
/// <param name="getNormalPressure_I">TRUE=> normal pressure;
/// FALSE=> tangential pressure (not supported on all tablets)</param>
/// <returns>maximum pressure value or zero on error</returns>
public static Int32 GetMaxPressure(bool getNormalPressure_I = true)
{
WintabAxis pressureAxis = new WintabAxis();
IntPtr buf = WMemUtils.AllocUnmanagedBuf(pressureAxis);
EWTIDevicesIndex devIdx = (getNormalPressure_I ?
EWTIDevicesIndex.DVC_NPRESSURE : EWTIDevicesIndex.DVC_TPRESSURE);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_DEVICES,
(uint)devIdx, buf);
pressureAxis = WMemUtils.MarshalUnmanagedBuf <WintabAxis>(buf, size);
} catch (Exception ex) {
throw new Exception("FAILED GetMaxPressure: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(pressureAxis.axMax);
}
/// <summary>
/// Returns a 3-element array describing the tablet's rotation range and resolution capabilities
/// </summary>
/// <returns></returns>
public static WintabAxisArray GetDeviceRotation(out bool rotationSupported_O)
{
WintabAxisArray axisArray = new WintabAxisArray();
rotationSupported_O = false;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(axisArray);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_DEVICES,
(uint)EWTIDevicesIndex.DVC_ROTATION, buf);
// If size == 0, then returns a zeroed struct.
axisArray = WMemUtils.MarshalUnmanagedBuf <WintabAxisArray>(buf, size);
rotationSupported_O = (axisArray.array[0].axResolution != 0 && axisArray.array[1].axResolution != 0);
} catch (Exception ex) {
throw new Exception("FAILED GetDeviceRotation: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(axisArray);
}
/// <summary>
/// Returns a string containing device name.
/// </summary>
/// <returns></returns>
public static String GetDeviceInfo()
{
string devInfo = null;
IntPtr buf = WMemUtils.AllocUnmanagedBuf(MAX_STRING_SIZE);
try {
int size = (int)WNativeMethods.WTInfo(
(uint)EWTICategoryIndex.WTI_DEVICES,
(uint)EWTIDevicesIndex.DVC_NAME, buf);
if (size < 1)
{
throw new Exception("GetDeviceInfo returned empty string.");
}
// Strip off final null character before marshalling.
devInfo = WMemUtils.MarshalUnmanagedString(buf, size - 1);
} catch (Exception ex) {
throw new Exception("FAILED GetDeviceInfo: " + ex.ToString());
}
WMemUtils.FreeUnmanagedBuf(buf);
return(devInfo);
}