private static float getCenteredAxis(MotionEvent evt, InputDevice device, Axis axis, int historyPos)
{
InputDevice.MotionRange range =
device.GetMotionRange(axis, evt.Source);
// A joystick at rest does not always report an absolute position of
// (0,0). Use the getFlat() method to determine the range of values
// bounding the joystick axis center.
if (range != null)
{
float flat = range.Flat;
float value =
historyPos < 0 ? evt.GetAxisValue(axis):
evt.GetHistoricalAxisValue(axis, historyPos);
// Ignore axis values that are within the 'flat' region of the
// joystick axis center.
if (Math.Abs(value) > flat)
{
return(value);
}
}
return(0);
}
bool OnTouchOrHoverEvent(MotionEvent e, bool isTouch)
{
MotionEventButtonState buttonState = e.ButtonState;
MotionEventButtonState pressedButtons = buttonState & ~mOldButtonState;
mOldButtonState = buttonState;
if ((pressedButtons & MotionEventButtonState.Secondary) != 0)
{
// Advance color when the right mouse button or first stylus button
// is pressed.
AdvanceColor();
}
PaintMode mode;
if ((buttonState & MotionEventButtonState.Tertiary) != 0)
{
// Splat paint when the middle mouse button or second stylus button is pressed.
mode = PaintMode.Splat;
}
else if (isTouch || (buttonState & MotionEventButtonState.Primary) != 0)
{
// Draw paint when touching or if the primary button is pressed.
mode = PaintMode.Draw;
}
else
{
// Otherwise, do not paint anything.
return(false);
}
MotionEventActions action = e.ActionMasked;
if (action == MotionEventActions.Down || action == MotionEventActions.Move ||
action == MotionEventActions.HoverMove)
{
int N = e.HistorySize;
int P = e.PointerCount;
for (int i = 0; i < N; i++)
{
for (int j = 0; j < P; j++)
{
Paint(GetPaintModeForTool(e.GetToolType(j), mode),
e.GetHistoricalX(j, i),
e.GetHistoricalY(j, i),
e.GetHistoricalPressure(j, i),
e.GetHistoricalTouchMajor(j, i),
e.GetHistoricalTouchMinor(j, i),
e.GetHistoricalOrientation(j, i),
e.GetHistoricalAxisValue(Axis.Distance, j, i),
e.GetHistoricalAxisValue(Axis.Tilt, j, i));
}
}
for (int j = 0; j < P; j++)
{
Paint(GetPaintModeForTool(e.GetToolType(j), mode),
e.GetX(j),
e.GetY(j),
e.GetPressure(j),
e.GetTouchMajor(j),
e.GetTouchMinor(j),
e.GetOrientation(j),
e.GetAxisValue(Axis.Distance, j),
e.GetAxisValue(Axis.Tilt, j));
}
mCurX = e.GetX();
mCurY = e.GetY();
}
return(true);
}