Page 221 - PDA Robotics Using Your Personal Digital Assistant to Control Your Robot

PDA 10 5/27/03 8:51 AM Page 197
}else{
// Chapter 10 / The PDA Robotics Command Center
// No Driver Detected
}
}
m_stretch_video.SetCheck(1);

//
// Add the name of the video driver to the title bar of the window
//

code = capDriverGetName( h_capwin, &szName[0], wSize );
if( code == TRUE )
{
title_text += " - Capture driver : ";
title_text += szName;
this->SetWindowText(title_text);
}

}
The video should now be displayed on the main window, as shown in
Figure 10.1. If the user has selected motion detection, stream the video
into a callback function, checking to see if anything has changed
between the first image that was stored in memory and the current
frame.

Motion Detection

void CBeamDlg::OnCheckVision()
{
if( m_check_vision.GetCheck() == 1)
{
m_radar_stat.SetWindowText("Motion Sense : ON");
//
// Disable stretch feature... the stretch requires significant processor cycles
//
if( m_stretch_video.GetCheck() == 1 )
{
m_stretch_video.SetCheck(0);
capPreviewScale(h_capwin, FALSE);
m_stretch_video.EnableWindow(FALSE);
this->InvalidateRect(NULL, TRUE);
}

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