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/****************************************************************************
** $Id: qt/examples/dragdrop/dropsite.cpp 2.3.1 edited 2001-01-26 $
**
** Drop site example implementation
**
** Created : 979899
**
** Copyright (C) 1997 by Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "dropsite.h"
#include "secret.h"
#include <qevent.h>
#include <qpixmap.h>
#include <qdragobject.h>
#include <qimage.h>
DropSite::DropSite( QWidget * parent, const char * name )
: QLabel( parent, name )
{
setAcceptDrops(TRUE);
}
DropSite::~DropSite()
{
// nothing necessary
}
void DropSite::dragMoveEvent( QDragMoveEvent * /*e*/ )
{
// Check if you want the drag at e->pos()...
// Give the user some feedback...
}
void DropSite::dragEnterEvent( QDragEnterEvent *e )
{
// Check if you want the drag...
if ( SecretDrag::canDecode( e )
|| QTextDrag::canDecode( e )
|| QImageDrag::canDecode( e )
|| QUrlDrag::canDecode( e ) )
{
e->accept();
}
// Give the user some feedback...
QString t;
for( int i=0; e->format( i ); i++ ) {
if ( *(e->format( i )) ) {
if ( !t.isEmpty() )
t += "\n";
t += e->format( i );
}
}
emit message( t );
setBackgroundColor(white);
}
void DropSite::dragLeaveEvent( QDragLeaveEvent * )
{
// Give the user some feedback...
emit message("");
setBackgroundColor(lightGray);
}
void DropSite::dropEvent( QDropEvent * e )
{
setBackgroundColor(lightGray);
// Try to decode to the data you understand...
QString str;
if ( QTextDrag::decode( e, str ) ) {
setText( str );
setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
return;
}
QPixmap pm;
if ( QImageDrag::decode( e, pm ) ) {
setPixmap( pm );
setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
return;
}
QStrList strings;
if ( QUrlDrag::decode( e, strings ) ) {
QString m("Full URLs:\n");
for (const char* u=strings.first(); u; u=strings.next())
m = m + " " + u + '\n';
QStringList files;
if ( QUrlDrag::decodeLocalFiles( e, files ) ) {
m += "Files:\n";
for (QStringList::Iterator i=files.begin(); i!=files.end(); ++i)
m = m + " " + *i + '\n';
}
setText( m );
setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
return;
}
if ( SecretDrag::decode( e, str ) ) {
setText( str );
setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
return;
}
}
DragMoviePlayer::DragMoviePlayer( QDragObject* p ) :
QObject(p),
dobj(p),
movie("trolltech.gif" )
{
movie.connectUpdate(this,SLOT(updatePixmap(const QRect&)));
}
void DragMoviePlayer::updatePixmap( const QRect& )
{
dobj->setPixmap(movie.framePixmap());
}
void DropSite::mousePressEvent( QMouseEvent * /*e*/ )
{
QDragObject *drobj;
if ( pixmap() ) {
drobj = new QImageDrag( pixmap()->convertToImage(), this );
#if 1
QPixmap pm;
pm.convertFromImage(pixmap()->convertToImage().smoothScale(
pixmap()->width()/3,pixmap()->height()/3));
drobj->setPixmap(pm,QPoint(-5,-7));
#else
// Try it.
(void)new DragMoviePlayer(drobj);
#endif
} else {
drobj = new QTextDrag( text(), this );
}
drobj->dragCopy();
}
void DropSite::backgroundColorChange( const QColor & )
{
// Reduce flicker by using repaint() rather than update()
repaint();
}
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