////////////////////////////////////////////////////////////////////////////////
//
// FUNCTION: InitAnimation
//
// DESCRIPTION: Prepare animated GIF
//
// RETURNS:
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// N T ALMOND 29012002 1.0 Origin
//
////////////////////////////////////////////////////////////////////////////////
bool ImageEx::InitAnimation(HWND hWnd/*, CRect rect*/)
{
m_hWnd = hWnd;
//m_rect = rect;
if (!m_bIsInitialized)
{
TRACE(_T("GIF not initialized\n"));
return false;
};
if (IsAnimatedGIF())
{
if (m_hThread == NULL)
{
unsigned int nTID = 0;
m_hThread = (HANDLE) _beginthreadex( NULL, 0, _ThreadAnimationProc, this, CREATE_SUSPENDED,&nTID);
if (!m_hThread)
{
TRACE(_T("Couldn't start a GIF animation thread\n"));
return true;
}
else
ResumeThread(m_hThread);
}
}
return false;
}
//bool ImageEx::InitAnimation(HWND hWnd,int x,int y)// POINT &pt)
bool ImageEx::InitAnimation(int x,int y)
{
m_pt.x=x;
m_pt.y=y;
if (IsAnimatedGIF())
{
return true;
}
return false;
}
/* Sizes the preview window based on the size of the embedded image. This is
over-ridden from the main DocPreview so that GIF animations aren't scaled
up, only down. This will allow the animation to be correctly centered.
*/
void CPicturePreview::SizeDocPreview(void)
{
if (IsAnimatedGIF())
{
ErasePreview();
// Determine our current image animation.
CSize sizeImage = m_pGIFAnimator->GetGIFScreenSize();
// Set some initial bounds for this object
int nFullWidth = m_crFullPreview.Width() - 2;
int nFullHeight = m_crFullPreview.Height() - 2;
int nWidth, nHeight;
if ( (sizeImage.cx > m_crFullPreview.Width()) ||
(sizeImage.cy > m_crFullPreview.Height()) )
{
// Ensure we have legal x and y values (otherwise we can get division by zero errors below.
if (sizeImage.cx == 0)
{
sizeImage.cx = 1;
}
if (sizeImage.cy == 0)
{
sizeImage.cy = 1;
}
// Scale to fit in the box
nHeight = nFullHeight;
if ((nWidth = scale_pcoord(nHeight, sizeImage.cx, sizeImage.cy)) > nFullWidth)
{
nWidth = nFullWidth;
nHeight = scale_pcoord(nWidth, sizeImage.cy, sizeImage.cx);
}
}
else
{
// Don't scale if we are smaller than the preview area.
nWidth = sizeImage.cx;
nHeight = sizeImage.cy;
}
// Size the preview window to the new dimensions.
SizePreviewWindow(nWidth, nHeight);
}
else
{
// It isn't an animated GIF so call the parent doc sizing method.
CDocumentPreview::SizeDocPreview();
}
}
////////////////////////////////////////////////////////////////////////////////
//
// FUNCTION: ImageEx::SetPause
//
// DESCRIPTION: Toggle Pause state of GIF
//
// RETURNS:
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// N T ALMOND 29012002 1.0 Origin
//
////////////////////////////////////////////////////////////////////////////////
void ImageEx::SetPause(bool bPause)
{
if (!IsAnimatedGIF())
return;
if (bPause && !m_bPause)
{
::ResetEvent(m_hPause);
}
else
{
if (m_bPause && !bPause)
{
::SetEvent(m_hPause);
}
}
m_bPause = bPause;
}
