Add Qt3 development HEAD version

1 files changed, 158 insertions, 0 deletions

diff --git a/examples/dragdrop/dropsite.cpp b/examples/dragdrop/dropsite.cpp
new file mode 100644
index 0000000..86e0c27
--- /dev/null
+++ b/examples/dragdrop/dropsite.cpp
@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Drop site example implementation
+**
+** Created : 979899
+**
+** Copyright (C) 1997-2008 Trolltech ASA.  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>
+#include <qdir.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 - only copy is possible
+    e->acceptAction( e->action() == QDropEvent::Copy );
+}
+
+
+void DropSite::dragEnterEvent( QDragEnterEvent *e )
+{
+    // Check if you want the drag...
+    if ( SecretDrag::canDecode( e )
+      || QTextDrag::canDecode( e )
+      || QImageDrag::canDecode( e )
+      || QUriDrag::canDecode( e ) )
+    {
+	e->accept();
+    }
+
+
+    // Give the user some feedback...
+    QString t;
+    const char *f;
+    for( int i=0; (f=e->format( i )); i++ ) {
+	if ( *(f) ) {
+	    if ( !t.isEmpty() )
+		t += "\n";
+	    t += f;
+	}
+    }
+    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...
+    QStrList strings;
+    if ( QUriDrag::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 ( QUriDrag::decodeLocalFiles( e, files ) ) {
+	    m += "Files:\n";
+	    for (QStringList::Iterator i=files.begin(); i!=files.end(); ++i)
+		m = m + "   " + QDir::convertSeparators(*i) + '\n';
+	}
+	setText( m );
+	setMinimumSize( minimumSize().expandedTo( sizeHint() ) );
+	return;
+    }
+
+    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;
+    }
+
+    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();
+}