h file
[CODE]
///////////////////////////////////////////////////////////////////////////////
//CalibrateForm.h
///////////////////////////////////////////////////////////////////////////////
#ifndef CALIBRATE_FORM_H_
#define CALIBRATE_FORM_H_
#include "common.h"
/*
form with calibration
*/
class CCalibrateForm : public CModalForm
{
public:
CCalibrateForm();
private:
Boolean OnOpen( EventType* _pEvent, Boolean& _bHandled );
Boolean OnDigitizer( EventType* _pEvent, Boolean& _bHandled );
BEGIN_EVENT_MAP( CModalForm )
EVENT_MAP_ENTRY( frmOpenEvent, OnOpen )
END_EVENT_MAP()
void DrawCrosshair( Coord _xpos, Coord _ypos );
void NextState();
Boolean PreSystemEventHook( EventType* _pEvent );
enum EState
{
eInitial,
eTopleft,
eBottomright,
eCheck,
eFinal
}m_eState;
Coord m_Extentx;
Coord m_Extenty;
Coord m_PenX;
Coord m_PenY;
PointType m_Expected_topleft;
PointType m_Expected_bottomright;
PointType m_Actual_topleft;
PointType m_Actual_bottomright;
};
#endif // CALIBRATE_FORM_H_
[/CODE]
cpp file
[CODE]
///////////////////////////////////////////////////////////////////////////////
//CalibrateForm.cpp
///////////////////////////////////////////////////////////////////////////////
#include "CalibrateForm.h"
#define OFFSET 10
#define ACCURACY 3
//-----------------------------------------------------------------------------
// Name : CCalibrateForm
// Parameters :
// Return :
// Description :
//-----------------------------------------------------------------------------
CCalibrateForm::CCalibrateForm() : CModalForm( frmCalibrate )
{
//m_OffscreenHnd = NULL;
m_Extentx = 0;
m_Extenty = 0;
MemSet( &m_Expected_topleft, sizeof( PointType ), 0 );
MemSet( &m_Expected_bottomright, sizeof( PointType ), 0 );
MemSet( &m_Actual_topleft, sizeof( PointType ), 0 );
MemSet( &m_Actual_bottomright, sizeof( PointType ), 0 );
}
//-----------------------------------------------------------------------------
// Name : OnOpen
// Parameters :
// Return :
// Description :
//-----------------------------------------------------------------------------
Boolean CCalibrateForm::OnOpen( EventType* _pEvent, Boolean& _bHandled )
{
UInt16 err = errNone;
WinGetDisplayExtent( &m_Extentx, &m_Extenty );
m_eState = eInitial;
if( err != errNone )
m_eState = eFinal;
NextState();
_bHandled = false;
return true;
}
//-----------------------------------------------------------------------------
// Name : OnPenUp
// Parameters :
// Return :
// Description :
//-----------------------------------------------------------------------------
Boolean CCalibrateForm::OnDigitizer( EventType* _pEvent, Boolean& _bHandled )
{
Boolean tapvalid;
m_PenX = _pEvent->screenX;
m_PenY = _pEvent->screenY;
NextState();
_bHandled = false;
return true;
}
//-----------------------------------------------------------------------------
// Name : DrawCrosshair
// Parameters :
// Return :
// Description :
//-----------------------------------------------------------------------------
void CCalibrateForm::DrawCrosshair( Coord _xpos, Coord _ypos )
{
UInt16 wIndex = FrmGetObjectIndex( GetFormPtr(), btnDigitizer );
FrmSetObjectPosition( GetFormPtr(), wIndex, _xpos, _ypos );
FrmShowObject( GetFormPtr(), wIndex );
UpdateForm();
}
//-----------------------------------------------------------------------------
// Name : NextState
// Parameters :
// Return :
// Description :
//-----------------------------------------------------------------------------
void CCalibrateForm::NextState()
{
Boolean done;
done = true;
switch( m_eState )
{
case eInitial:
{
PenResetCalibration();
DrawCrosshair( /*OFFSET*/1, /*OFFSET*/15 );
m_Expected_topleft.x = OFFSET + 1;
m_Expected_topleft.y = OFFSET + 15;
m_eState = eTopleft;
}; break;
case eTopleft:
{
// Got top-left tap. Draw 2nd crosshair.
m_Actual_topleft.x = m_PenX;
m_Actual_topleft.y = m_PenY;
SysTaskDelay( SysTicksPerSecond() / 4 );
DrawCrosshair( m_Extentx - /*OFFSET*/21, m_Extenty - /*OFFSET*/21 );
m_Expected_bottomright.x = m_Extentx - OFFSET/*21*/;
m_Expected_bottomright.y = m_Extenty - OFFSET/*21*/;
m_eState = eBottomright;
}; break;
case eBottomright:
{
// Got bottom-right tap. Draw 3rd crosshair.
m_Actual_bottomright.x = m_PenX;
m_Actual_bottomright.y = m_PenY;
PenCalibrate( &m_Actual_topleft, &m_Actual_bottomright,
&m_Expected_topleft,
&m_Expected_bottomright );
SysTaskDelay( SysTicksPerSecond() / 4 );
DrawCrosshair( m_Extentx * 3 / 4, m_Extenty * 3 / 4 );
m_eState = eCheck;
}; break;
case eCheck:
{
// Got final tap. Check it for accuracy and restart or exit accordingly.
m_PenX -= 10;
m_PenY -= 10;
if( ( m_PenX > ( ( m_Extentx * 3 / 4 ) + ACCURACY ) )
|| ( m_PenX < ( ( m_Extentx * 3 / 4 ) - ACCURACY ) )
|| ( m_PenY > ( ( m_Extenty * 3 / 4 ) + ACCURACY ) )
|| ( m_PenY < ( ( m_Extenty * 3 / 4 ) - ACCURACY ) ) )
{
m_eState = eInitial;
done = false;
break;
}
m_eState = eFinal;
done = false;
CloseForm();
}; break;
case eFinal:
{
CloseForm();
}break;
default:
{
ErrNonFatalDisplayIf( 1, "Invalid State" );
m_eState = eFinal;
done = false;
}; break;
}
}
//-----------------------------------------------------------------------------
// Name : PreSystemEventHook
// Parameters :
// Return :
// Description :
//-----------------------------------------------------------------------------
Boolean CCalibrateForm::PreSystemEventHook( EventType* _pEvent )
{
Boolean _bHandled = false;
switch( _pEvent->eType )
{
case penDownEvent:
{
OnDigitizer( _pEvent, _bHandled );
return true;
}; break;
};
return false;
}
[/CODE]
resoures
[CODE]
FORM ID frmCalibrate AT ( 0 0 160 160 )
NOFRAME MODAL
BEGIN
TITLE "Calibrating..."
BUTTON "" ID btnDigitizer AT (1 15 20 20) BITMAPID
bmpDigitizer GRAPHICAL
END
[/CODE]
bmpDigitizer is bitmap with cross 20x20
H> Hi all!
H> from time to time I need to recalibrate the digitizer from within my app.
Unfortunately I cannot determine how to make the functions
H> PenResetCalibration() and
H> PenCalibrate()
H> work properly.
H> In principle, I take three pen-taps at top left, middle and bottom-right
locations just like the built in welcome app. and then call PenCalibrate() --
so much for the theory.
H> BUT: If I call PenResetCalibration() before that on a SONY Clie, the entire
device hangs or makes the digitizer just plain dead -- the device does not
accept any pen input.
H> If I just call PenCalibrate() without a previous PenResetCalibration() it
works fine on SONY clies and Palm Tungstens -- but only for the moment. If I
quit the app or soft-reset the device, the
H> entire calibration is skrewed up with screen and digitizer coordinates
deviating wildly. As if the previous calibration were not stored properly.
H> Does anybody know how those functions have to be applied, or how the logic
of the built-in calibrator app. works? Maybe our esteemed insider Ben?
H> Thank a lot!
--
Best regards,
Vladimir mailto:[EMAIL PROTECTED]
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