private void clearScreen()
{
// note: There is no need to clear the tablet screen prior to writing an image.
if (m_useEncryption)
{
m_tablet.endCapture();
}
m_tablet.writeImage((byte)m_encodingMode, m_bitmapData);
if (m_penDataOptionMode == (int)PenDataOptionMode.PenDataOptionMode_TimeCountSequence)
{
m_penTimeData.Clear();
}
else
{
m_penData.Clear();
}
if (m_useEncryption)
{
m_tablet.startCapture(0xc0ffee);
}
m_isDown = 0;
this.Invalidate();
}
// Pass in the device you want to connect to!
public SignatureForm(wgssSTU.IUsbDevice usbDevice, bool encryptionWanted)
{
int currentPenDataOptionMode;
m_penDataOptionMode = -1;
// This is a DPI aware application, so ensure you understand how .NET client coordinates work.
// Testing using a Windows installation set to a high DPI is recommended to understand how
// values get scaled or not.
this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
InitializeComponent();
m_penData = new List <wgssSTU.IPenData>();
m_tablet = new wgssSTU.Tablet();
wgssSTU.ProtocolHelper protocolHelper = new wgssSTU.ProtocolHelper();
// A more sophisticated applications should cycle for a few times as the connection may only be
// temporarily unavailable for a second or so.
// For example, if a background process such as Wacom STU Display
// is running, this periodically updates a slideshow of images to the device.
wgssSTU.IErrorCode ec = m_tablet.usbConnect(usbDevice, true);
if (ec.value == 0)
{
m_capability = m_tablet.getCapability();
m_information = m_tablet.getInformation();
// First find out if the pad supports the pen data option mode (the 300 doesn't)
currentPenDataOptionMode = getPenDataOptionMode();
// Set up the tablet to return time stamp with the pen data or just basic data
setPenDataOptionMode(currentPenDataOptionMode);
}
else
{
throw new Exception(ec.message);
}
this.SuspendLayout();
this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
// Set the size of the client window to be actual size,
// based on the reported DPI of the monitor.
Size clientSize = new Size((int)(m_capability.tabletMaxX / 2540F * 96F), (int)(m_capability.tabletMaxY / 2540F * 96F));
this.ClientSize = clientSize;
this.ResumeLayout();
m_btns = new Button[3];
if (usbDevice.idProduct != 0x00a2)
{
// Place the buttons across the bottom of the screen.
int w2 = m_capability.screenWidth / 3;
int w3 = m_capability.screenWidth / 3;
int w1 = m_capability.screenWidth - w2 - w3;
int y = m_capability.screenHeight * 6 / 7;
int h = m_capability.screenHeight - y;
m_btns[0].Bounds = new Rectangle(0, y, w1, h);
m_btns[1].Bounds = new Rectangle(w1, y, w2, h);
m_btns[2].Bounds = new Rectangle(w1 + w2, y, w3, h);
}
else
{
// The STU-300 is very shallow, so it is better to utilise
// the buttons to the side of the display instead.
int x = m_capability.screenWidth * 3 / 4;
int w = m_capability.screenWidth - x;
int h2 = m_capability.screenHeight / 3;
int h3 = m_capability.screenHeight / 3;
int h1 = m_capability.screenHeight - h2 - h3;
m_btns[0].Bounds = new Rectangle(x, 0, w, h1);
m_btns[1].Bounds = new Rectangle(x, h1, w, h2);
m_btns[2].Bounds = new Rectangle(x, h1 + h2, w, h3);
}
m_btns[0].Text = "OK";
m_btns[1].Text = "Clear";
m_btns[2].Text = "Cancel";
m_btns[0].Click = new EventHandler(btnOk_Click);
m_btns[1].Click = new EventHandler(btnClear_Click);
m_btns[2].Click = new EventHandler(btnCancel_Click);
// Disable color if the STU-520 bulk driver isn't installed.
// This isn't necessary, but uploading colour images with out the driver
// is very slow.
// Calculate the encodingMode that will be used to update the image
ushort idP = m_tablet.getProductId();
wgssSTU.encodingFlag encodingFlag = (wgssSTU.encodingFlag)protocolHelper.simulateEncodingFlag(idP, 0);
bool useColor = false;
if ((encodingFlag & (wgssSTU.encodingFlag.EncodingFlag_16bit | wgssSTU.encodingFlag.EncodingFlag_24bit)) != 0)
{
if (m_tablet.supportsWrite())
{
useColor = true;
}
}
if ((encodingFlag & wgssSTU.encodingFlag.EncodingFlag_24bit) != 0)
{
m_encodingMode = m_tablet.supportsWrite() ? wgssSTU.encodingMode.EncodingMode_24bit_Bulk : wgssSTU.encodingMode.EncodingMode_24bit;
}
else if ((encodingFlag & wgssSTU.encodingFlag.EncodingFlag_16bit) != 0)
{
m_encodingMode = m_tablet.supportsWrite() ? wgssSTU.encodingMode.EncodingMode_16bit_Bulk : wgssSTU.encodingMode.EncodingMode_16bit;
}
else
{
// assumes 1bit is available
m_encodingMode = wgssSTU.encodingMode.EncodingMode_1bit;
}
// Size the bitmap to the size of the LCD screen.
// This application uses the same bitmap for both the screen and client (window).
// However, at high DPI, this bitmap will be stretch and it would be better to
// create individual bitmaps for screen and client at native resolutions.
m_bitmap = new Bitmap(m_capability.screenWidth, m_capability.screenHeight, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
{
Graphics gfx = Graphics.FromImage(m_bitmap);
gfx.Clear(Color.White);
// Uses pixels for units as DPI won't be accurate for tablet LCD.
Font font = new Font(FontFamily.GenericSansSerif, m_btns[0].Bounds.Height / 2F, GraphicsUnit.Pixel);
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
if (useColor)
{
gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
}
else
{
// Anti-aliasing should be turned off for monochrome devices.
gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
}
// Draw the buttons
for (int i = 0; i < m_btns.Length; ++i)
{
if (useColor)
{
gfx.FillRectangle(Brushes.LightGray, m_btns[i].Bounds);
}
gfx.DrawRectangle(Pens.Black, m_btns[i].Bounds);
gfx.DrawString(m_btns[i].Text, font, Brushes.Black, m_btns[i].Bounds, sf);
}
gfx.Dispose();
font.Dispose();
// Finally, use this bitmap for the window background.
this.BackgroundImage = m_bitmap;
this.BackgroundImageLayout = ImageLayout.Stretch;
}
// Now the bitmap has been created, it needs to be converted to device-native
// format.
{
// Unfortunately it is not possible for the native COM component to
// understand .NET bitmaps. We have therefore convert the .NET bitmap
// into a memory blob that will be understood by COM.
System.IO.MemoryStream stream = new System.IO.MemoryStream();
m_bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
m_bitmapData = (byte[])protocolHelper.resizeAndFlatten(stream.ToArray(), 0, 0, (uint)m_bitmap.Width, (uint)m_bitmap.Height, m_capability.screenWidth, m_capability.screenHeight, (byte)m_encodingMode, wgssSTU.Scale.Scale_Fit, 0, 0);
protocolHelper = null;
stream.Dispose();
}
// If you wish to further optimize image transfer, you can compress the image using
// the Zlib algorithm.
bool useZlibCompression = false;
if (!useColor && useZlibCompression)
{
// m_bitmapData = compress_using_zlib(m_bitmapData); // insert compression here!
m_encodingMode |= wgssSTU.encodingMode.EncodingMode_Zlib;
}
// Calculate the size and cache the inking pen.
SizeF s = this.AutoScaleDimensions;
float inkWidthMM = 0.7F;
m_penInk = new Pen(Color.DarkBlue, inkWidthMM / 25.4F * ((s.Width + s.Height) / 2F));
m_penInk.StartCap = m_penInk.EndCap = System.Drawing.Drawing2D.LineCap.Round;
m_penInk.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
addDelegates();
// Initialize the screen
clearScreen();
if (encryptionWanted)
{
if (m_tablet.isSupported((byte)wgssSTU.ReportId.ReportId_EncryptionStatus))
{
MyEncryptionHandler2 e = new MyEncryptionHandler2();
m_tablet.encryptionHandler2 = e;
m_useEncryption = true;
}
if (m_useEncryption)
{
m_tablet.startCapture(0xc0ffee);
}
}
// Enable the pen data on the screen (if not already)
m_tablet.setInkingMode(0x01);
}