TDE graphics utilities
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/*
Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG_KP_SELECTION_DRAG 0
#include <kpselectiondrag.h>
#include <tqdatastream.h>
#include <kdebug.h>
#include <kppixmapfx.h>
#include <kpselection.h>
// public static
const char * const kpSelectionDrag::selectionMimeType = "application/x-kolourpaint-selection";
kpSelectionDrag::kpSelectionDrag (TQWidget *dragSource, const char *name)
: TQImageDrag (dragSource, name)
{
}
kpSelectionDrag::kpSelectionDrag (const TQImage &image, TQWidget *dragSource, const char *name)
: TQImageDrag (image, dragSource, name)
{
}
kpSelectionDrag::kpSelectionDrag (const kpSelection &sel, TQWidget *dragSource, const char *name)
: TQImageDrag (dragSource, name)
{
setSelection (sel);
}
kpSelectionDrag::~kpSelectionDrag ()
{
}
// public
void kpSelectionDrag::setSelection (const kpSelection &sel)
{
if (!sel.pixmap ())
{
kdError () << "kpSelectionDrag::setSelection() without pixmap" << endl;
return;
}
m_selection = sel;
// OPT: an awful waste of memory storing image in both selection and TQImage
// HACK: need to set image else TQImageDrag::format() lies
setImage (kpPixmapFX::convertToImage (*m_selection.pixmap ()));
}
// protected
bool kpSelectionDrag::holdsSelection () const
{
return bool (m_selection.pixmap ());
}
// public virtual [base TQMimeSource]
const char *kpSelectionDrag::format (int which) const
{
#if DEBUG_KP_SELECTION_DRAG && 0
kdDebug () << "kpSelectionDrag::format(" << which << ")" << endl;
#endif
const char *ret = TQImageDrag::format (which);
if (ret)
{
#if DEBUG_KP_SELECTION_DRAG && 0
kdDebug () << "\tTQImageDrag reports " << ret << endl;
#endif
return ret;
}
int i;
for (i = 0; TQImageDrag::format (i); i++)
;
#if DEBUG_KP_SELECTION_DRAG && 0
kdDebug () << "\tend of TQImageDrag format list at " << i << endl;
#endif
if (i == which)
{
#if DEBUG_KP_SELECTION_DRAG && 0
kdDebug () << "\treturning own mimetype" << endl;
#endif
return kpSelectionDrag::selectionMimeType;
}
else
{
#if DEBUG_KP_SELECTION_DRAG && 0
kdDebug () << "\treturning non-existent" << endl;
#endif
return 0;
}
}
// public virtual [base TQMimeSource]
// Don't need to override in TQt 3.2 (the TQMimeSource base will work)
// but we do so just in case TQImageDrag later decides to override it.
bool kpSelectionDrag::provides (const char *mimeType) const
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "kpSelectionDrag::provides(" << mimeType << ")" << endl;
#endif
if (!mimeType)
return false;
return (!strcmp (mimeType, kpSelectionDrag::selectionMimeType) ||
TQImageDrag::provides (mimeType));
}
// public virtual [base TQMimeSource]
TQByteArray kpSelectionDrag::encodedData (const char *mimeType) const
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "kpSelectionDrag::encodedData(" << mimeType << ")" << endl;
#endif
if (!mimeType)
return TQByteArray ();
if (!strcmp (mimeType, kpSelectionDrag::selectionMimeType))
{
TQByteArray ba;
TQDataStream stream (ba, IO_WriteOnly);
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\twant it as kpSelection in TQByteArray" << endl;
#endif
if (holdsSelection ())
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\t\thave selection - return it" << endl;
#endif
stream << m_selection;
}
else
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\t\thave image - call kpSelectionDrag::decode(TQImage)" << endl;
#endif
TQImage image;
if (kpSelectionDrag::decode (this, image/*ref*/))
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\t\t\tok - returning sel with image w="
<< image.width ()
<< " h="
<< image.height ()
<< endl;
#endif
TQPixmap pixmap = kpPixmapFX::convertToPixmapAsLosslessAsPossible (image);
stream << kpSelection (kpSelection::Rectangle,
TQRect (0, 0, pixmap.width (), pixmap.height ()),
pixmap);
}
else
{
kdError () << "kpSelectionDrag::encodedData(" << mimeType << ")"
<< " kpSelectionDrag(TQImage) could not decode data into TQImage"
<< endl;
stream << kpSelection ();
}
}
return ba;
}
else
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\twant it as TQImage in TQByteArray" << endl;
#endif
return TQImageDrag::encodedData (mimeType);
}
}
// public static
bool kpSelectionDrag::canDecode (const TQMimeSource *e)
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "kpSelectionDrag::canDecode()" << endl;
#endif
if (!e)
return false;
return (e->provides (kpSelectionDrag::selectionMimeType) ||
TQImageDrag::canDecode (e));
}
// public static
bool kpSelectionDrag::decode (const TQMimeSource *e, TQImage &img)
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "kpSelectionDrag::decode(TQImage)" << endl;
#endif
if (!e)
return false;
return (TQImageDrag::canDecode (e) && // prevents X errors, jumps based on unitialised values...
TQImageDrag::decode (e, img/*ref*/));
}
// public static
bool kpSelectionDrag::decode (const TQMimeSource *e, kpSelection &sel,
const kpPixmapFX::WarnAboutLossInfo &wali)
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "kpSelectionDrag::decode(kpSelection)" << endl;
#endif
if (!e)
return false;
if (e->provides (kpSelectionDrag::selectionMimeType))
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\tmimeSource provides selection - just return it in TQByteArray" << endl;
#endif
TQByteArray data = e->encodedData (kpSelectionDrag::selectionMimeType);
TQDataStream stream (data, IO_ReadOnly);
// (no need for wali as kpSelection's by definition only support TQPixmap's)
stream >> sel;
}
else
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\tmimeSource doesn't provide selection - try image" << endl;
#endif
TQImage image;
if (kpSelectionDrag::decode (e, image/*ref*/))
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "\tok w=" << image.width () << " h=" << image.height () << endl;
#endif
sel = kpSelection (kpSelection::Rectangle,
TQRect (0, 0, image.width (), image.height ()),
kpPixmapFX::convertToPixmapAsLosslessAsPossible (image, wali));
}
else
{
#if DEBUG_KP_SELECTION_DRAG
kdDebug () << "kpSelectionDrag::decode(kpSelection) mimeSource had no sel "
"and could not decode to image" << endl;
#endif
return false;
}
}
return true;
}
#include <kpselectiondrag.moc>