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159 lines
3.5 KiB
159 lines
3.5 KiB
/****************************************************************************
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**
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** Drop site example implementation
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**
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** Created : 979899
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**
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** Copyright (C) 1997-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "dropsite.h"
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#include "secret.h"
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#include <qevent.h>
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#include <qpixmap.h>
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#include <qdragobject.h>
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#include <qimage.h>
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#include <qdir.h>
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DropSite::DropSite( QWidget * parent, const char * name )
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: QLabel( parent, name )
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{
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setAcceptDrops(TRUE);
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}
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DropSite::~DropSite()
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{
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// nothing necessary
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}
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void DropSite::dragMoveEvent( QDragMoveEvent *e )
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{
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// Check if you want the drag at e->pos()...
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// Give the user some feedback - only copy is possible
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e->acceptAction( e->action() == QDropEvent::Copy );
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}
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void DropSite::dragEnterEvent( QDragEnterEvent *e )
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{
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// Check if you want the drag...
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if ( SecretDrag::canDecode( e )
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|| QTextDrag::canDecode( e )
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|| QImageDrag::canDecode( e )
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|| QUriDrag::canDecode( e ) )
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{
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e->accept();
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}
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// Give the user some feedback...
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QString t;
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const char *f;
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for( int i=0; (f=e->format( i )); i++ ) {
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if ( *(f) ) {
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if ( !t.isEmpty() )
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t += "\n";
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t += f;
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}
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}
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emit message( t );
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setBackgroundColor(white);
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}
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void DropSite::dragLeaveEvent( QDragLeaveEvent * )
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{
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// Give the user some feedback...
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emit message("");
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setBackgroundColor(lightGray);
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}
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void DropSite::dropEvent( QDropEvent * e )
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{
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setBackgroundColor(lightGray);
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// Try to decode to the data you understand...
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QStrList strings;
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if ( QUriDrag::decode( e, strings ) ) {
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QString m("Full URLs:\n");
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for (const char* u=strings.first(); u; u=strings.next())
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m = m + " " + u + '\n';
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QStringList files;
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if ( QUriDrag::decodeLocalFiles( e, files ) ) {
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m += "Files:\n";
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for (QStringList::Iterator i=files.begin(); i!=files.end(); ++i)
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m = m + " " + QDir::convertSeparators(*i) + '\n';
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}
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setText( m );
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setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
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return;
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}
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QString str;
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if ( QTextDrag::decode( e, str ) ) {
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setText( str );
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setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
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return;
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}
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QPixmap pm;
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if ( QImageDrag::decode( e, pm ) ) {
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setPixmap( pm );
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setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
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return;
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}
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if ( SecretDrag::decode( e, str ) ) {
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setText( str );
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setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
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return;
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}
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}
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DragMoviePlayer::DragMoviePlayer( QDragObject* p ) :
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QObject(p),
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dobj(p),
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movie("trolltech.gif" )
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{
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movie.connectUpdate(this,SLOT(updatePixmap(const QRect&)));
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}
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void DragMoviePlayer::updatePixmap( const QRect& )
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{
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dobj->setPixmap(movie.framePixmap());
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}
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void DropSite::mousePressEvent( QMouseEvent * /*e*/ )
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{
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QDragObject *drobj;
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if ( pixmap() ) {
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drobj = new QImageDrag( pixmap()->convertToImage(), this );
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#if 1
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QPixmap pm;
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pm.convertFromImage(pixmap()->convertToImage().smoothScale(
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pixmap()->width()/3,pixmap()->height()/3));
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drobj->setPixmap(pm,QPoint(-5,-7));
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#else
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// Try it.
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(void)new DragMoviePlayer(drobj);
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#endif
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} else {
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drobj = new QTextDrag( text(), this );
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}
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drobj->dragCopy();
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}
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void DropSite::backgroundColorChange( const QColor & )
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{
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// Reduce flicker by using repaint() rather than update()
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repaint();
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}
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