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modify. These properties are the
size of the thumbnail, the position, background
color, border size, and the width & color of
the border line. The thumbnail generation properties
are the following: disable magnification and
compression with fix aspect or with distortion.
The browsing properties are: recursion of
directories, browse into multi-page files, file
selection type and maximum file size.
The thumbnail control comes with
sample application written in several languages
to help developers, such as C++, C#, J#, VB,
Delphi, and VB.NET.
The
following sample C++ code demonstrates how
simple it is to set the displaying properties,
thumbnail generation properties and browsing
properties. Once the properties are set, the
browsing process is started. |
// set
displaying properties
m_biThumb.SetImageSize(253, 200);
m_biThumb.SetBorderSize(5);
m_biThumb.SetBgColor(RGB(255, 255, 255));
m_biThumb.SetBorderLine(1, RGB(0, 0, 0));
// set thumbnail
generation properties
m_biThumb.SetEnableMagnification(false);
m_biThumb.SetAspectFixation(true);
// set browsing properties
m_biThumb.SetRecursiveBrowsing(true);
m_biThumb.SetMultipageExpanding(true);
m_biThumb.SetSelectionOptions(SO_ALLIMAGEFILES);
// start browsing
m_biThumb.BrowseInDirectory("C:\\"); |
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The following code
contains the event handler function that
displays the current thumbnail and gets
the information of the image.
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LRESULT
CThumbnailLowDlg::OnThumbnailEventHandler(WPARAM
wParam, LPARAM lParam)
{
// it must
be call
BiThumbnailInfo* info =
reinterpret_cast<BiThumbnailInfo*>(lParam);
// add
your code here
// display thumbnail
CClientDC dc(this);
HBITMAP bmp;
if(info->bitmap){
bmp = info->bitmap;
}else{
bmp =
LoadBitmap(AfxGetInstanceHandle(),
MAKEINTRESOURCE(IDB_BITMAP_ILLEGAL));
}
m_biThumb.DisplayThumbnail(dc,
12, 45, bmp);
// load
image information into a list
control
CString strInfo;
if(info->info.isLegal){
strInfo.Format("%s", info->info.format);
m_properties.SetItemText(0, 1,
strInfo);
strInfo.Format("%i", info->info.width);
m_properties.SetItemText(1, 1,
strInfo);
strInfo.Format("%i", info->info.height);
m_properties.SetItemText(2, 1,
strInfo);
strInfo.Format("%i", info->info.resX);
m_properties.SetItemText(3, 1,
strInfo);
strInfo.Format("%i", info->info.resY);
m_properties.SetItemText(4, 1,
strInfo);
strInfo.Format("%i", info->info.depth);
m_properties.SetItemText(5, 1,
strInfo);
}
// it must
be call
BiThumbnail::DestroyThumbnailInfo(info);
return 0;
} |
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