private void onPenDataTimeCountSequence(wgssSTU.IPenDataTimeCountSequence penTimeData)
{
UInt16 penSequence;
UInt16 penTimeStamp;
UInt16 penPressure;
UInt16 x;
UInt16 y;
penPressure = penTimeData.pressure;
penTimeStamp = penTimeData.timeCount;
penSequence = penTimeData.sequence;
x = penTimeData.x;
y = penTimeData.y;
Point pt = tabletToScreen(penTimeData);
int btn = buttonClicked(pt); // Check if a button was clicked
bool isDown = (penTimeData.sw != 0);
//m_parent.print("Handling pen data timed");
// This code uses a model of four states the pen can be in:
// down or up, and whether this is the first sample of that state.
if (isDown)
{
if (m_isDown == 0)
{
// transition to down
if (btn > 0)
{
// We have put the pen down on a button.
// Track the pen without inking on the client.
m_isDown = btn;
}
else
{
// We have put the pen down somewhere else.
// Treat it as part of the signature.
m_isDown = -1;
}
}
else
{
// already down, keep doing what we're doing!
}
// draw
if (m_penTimeData.Count != 0 && m_isDown == -1)
{
// Draw a line from the previous down point to this down point.
// This is the simplist thing you can do; a more sophisticated program
// can perform higher quality rendering than this!
Graphics gfx = setQualityGraphics(this);
wgssSTU.IPenDataTimeCountSequence prevPenData = m_penTimeData[m_penTimeData.Count - 1];
PointF prev = tabletToClient(prevPenData);
gfx.DrawLine(m_penInk, prev, tabletToClientTimed(penTimeData));
gfx.Dispose();
}
// The pen is down, store it for use later.
if (m_isDown == -1)
{
m_penTimeData.Add(penTimeData);
}
}
else
{
if (m_isDown != 0)
{
// transition to up
if (btn > 0)
{
// The pen is over a button
if (btn == m_isDown)
{
// The pen was pressed down over the same button as is was lifted now.
// Consider that as a click!
//m_parent.print("Performing button " + btn);
m_btns[btn - 1].PerformClick();
}
}
m_isDown = 0;
}
else
{
// still up
}
// Add up data once we have collected some down data.
if (m_penTimeData != null)
{
if (m_penTimeData.Count != 0)
{
m_penTimeData.Add(penTimeData);
}
}
}
}
private PointF tabletToClientTimed(wgssSTU.IPenDataTimeCountSequence penData)
{
// Client means the Windows Form coordinates.
return(new PointF((float)penData.x * this.ClientSize.Width / m_capability.tabletMaxX, (float)penData.y * this.ClientSize.Height / m_capability.tabletMaxY));
}