1 files changed, 220 insertions, 0 deletions
diff --git a/kcontrol/background/bgmonitor.cpp b/kcontrol/background/bgmonitor.cpp
new file mode 100644
index 000000000..6af2f7458
--- /dev/null
+++ b/kcontrol/background/bgmonitor.cpp
@@ -0,0 +1,220 @@
+/* vi: ts=8 sts=4 sw=4
+   kate: space-indent on; indent-width 4; indent-mode cstyle;
+
+   This file is part of the KDE project, module kcmbackground.
+
+   Copyright (C) 2002 Laurent Montel <montell@club-internet.fr>
+   Copyright (C) 2003 Waldo Bastian <bastian@kde.org>
+   Copyright (C) 2005 David Saxton <david@bluehaze.org>
+  
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License 
+   version 2 as published by the Free Software Foundation.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+ */
+
+#include <kdebug.h>
+#include <klocale.h>
+#include <kpixmap.h>
+#include <kstandarddirs.h>
+#include <kurldrag.h>
+#include <qapplication.h>
+#include <qpixmap.h>
+#include <qwhatsthis.h>
+
+#include "bgmonitor.h"
+
+// Constants used (should they be placed somewhere?)
+// Size of monitor image: 200x186
+// Geometry of "display" part of monitor image: (23,14)-[151x115]
+
+//BEGIN class BGMonitorArrangement
+BGMonitorArrangement::BGMonitorArrangement(QWidget *parent, const char *name)
+    : QWidget(parent, name)
+{
+    m_pBGMonitor.resize( QApplication::desktop()->numScreens(), 0l );
+    
+    for (int screen = 0; screen < QApplication::desktop()->numScreens(); ++screen)
+    {
+        BGMonitorLabel * label = new BGMonitorLabel(this);
+        m_pBGMonitor[screen] = label;
+        
+        connect( label->monitor(), SIGNAL(imageDropped(const QString &)), this, SIGNAL(imageDropped(const QString &)) );
+    }
+    
+    parent->setFixedSize(200, 186);
+    setFixedSize(200, 186);
+    updateArrangement();
+}
+
+
+BGMonitor * BGMonitorArrangement::monitor( unsigned screen ) const
+{
+    return m_pBGMonitor[screen]->monitor();
+}
+
+
+QRect BGMonitorArrangement::expandToPreview( QRect r ) const
+{
+    double scaleX = 200.0 / 151.0;
+    double scaleY = 186.0 / 115.0;
+    return QRect( int(r.x()*scaleX), int(r.y()*scaleY), int(r.width()*scaleX), int(r.height()*scaleY) );
+}
+
+
+QSize BGMonitorArrangement::expandToPreview( QSize s ) const
+{
+    double scaleX = 200.0 / 151.0;
+    double scaleY = 186.0 / 115.0;
+    return QSize( int(s.width()*scaleX), int(s.height()*scaleY) );
+}
+
+
+QPoint BGMonitorArrangement::expandToPreview( QPoint p ) const
+{
+    double scaleX = 200.0 / 151.0;
+    double scaleY = 186.0 / 115.0;
+    return QPoint( int(p.x()*scaleX), int(p.y()*scaleY) );
+}
+
+
+void BGMonitorArrangement::updateArrangement()
+{
+    // In this function, sizes, etc have a normal value, and their "expanded"
+    // value. The expanded value is used for setting the size of the monitor
+    // image that contains the preview of the background. The monitor image
+    // will set the background preview back to the normal value.
+    
+    QRect overallGeometry;
+    for (int screen = 0; screen < QApplication::desktop()->numScreens(); ++screen)
+        overallGeometry |= QApplication::desktop()->screenGeometry(screen);
+    
+    QRect expandedOverallGeometry = expandToPreview(overallGeometry);
+    
+    double scale = QMIN(
+                double(width()) / double(expandedOverallGeometry.width()),
+                double(height()) / double(expandedOverallGeometry.height())
+                       );
+    
+    m_combinedPreviewSize = overallGeometry.size() * scale;
+    
+    m_maxPreviewSize = QSize(0,0);
+    int previousMax = 0;
+    
+    for (int screen = 0; screen < QApplication::desktop()->numScreens(); ++screen)
+    {
+        QPoint topLeft = (QApplication::desktop()->screenGeometry(screen).topLeft() - overallGeometry.topLeft()) * scale;
+        QPoint expandedTopLeft = expandToPreview(topLeft);
+        
+        QSize previewSize = QApplication::desktop()->screenGeometry(screen).size() * scale;
+        QSize expandedPreviewSize = expandToPreview(previewSize);
+        
+        if ( (previewSize.width() * previewSize.height()) > previousMax )
+        {
+            previousMax = previewSize.width() * previewSize.height();
+            m_maxPreviewSize = previewSize;
+        }
+        
+        m_pBGMonitor[screen]->setPreviewPosition( QRect( topLeft, previewSize ) );
+        m_pBGMonitor[screen]->setGeometry( QRect( expandedTopLeft, expandedPreviewSize ) );
+        m_pBGMonitor[screen]->updateMonitorGeometry();
+    }
+}
+
+
+void BGMonitorArrangement::resizeEvent( QResizeEvent * e )
+{
+    QWidget::resizeEvent(e);
+    updateArrangement();
+}
+
+
+void BGMonitorArrangement::setPixmap( const KPixmap & pm )
+{
+    for (unsigned screen = 0; screen < m_pBGMonitor.size(); ++screen)
+    {
+        QRect position = m_pBGMonitor[screen]->previewPosition();
+        
+        QPixmap monitorPixmap( position.size(), pm.depth() );
+        copyBlt( &monitorPixmap, 0, 0, &pm, position.x(), position.y(), position.width(), position.height() );
+        m_pBGMonitor[screen]->monitor()->setPixmap(monitorPixmap);
+    }
+}
+//END class BGMonitorArrangement
+
+
+
+//BEGIN class BGMonitorLabel
+BGMonitorLabel::BGMonitorLabel(QWidget *parent, const char *name)
+    : QLabel(parent, name)
+{
+    setAlignment(AlignCenter);
+    setScaledContents(true);
+    setPixmap( QPixmap( locate("data",  "kcontrol/pics/monitor.png") ) );
+    m_pBGMonitor = new BGMonitor(this);
+    
+    QWhatsThis::add( this, i18n("This picture of a monitor contains a preview of what the current settings will look like on your desktop.") );
+}
+
+
+void BGMonitorLabel::updateMonitorGeometry()
+{
+    double scaleX = double(width()) / double(sizeHint().width());
+    double scaleY = double(height()) / double(sizeHint().height());
+    
+    kdDebug() << k_funcinfo << " Setting geometry to " << QRect( int(23*scaleX), int(14*scaleY), int(151*scaleX), int(115*scaleY) ) << endl;
+    m_pBGMonitor->setGeometry( int(23*scaleX), int(14*scaleY), int(151*scaleX), int(115*scaleY) );
+}
+
+
+void BGMonitorLabel::resizeEvent( QResizeEvent * e )
+{
+    QWidget::resizeEvent(e);
+    updateMonitorGeometry();
+}
+//END class BGMonitorLabel
+
+
+
+//BEGIN class BGMonitor
+BGMonitor::BGMonitor(QWidget *parent, const char *name)
+    : QLabel(parent, name)
+{
+    setAlignment(AlignCenter);
+    setScaledContents(true);
+    setAcceptDrops(true);
+}
+
+
+void BGMonitor::dropEvent(QDropEvent *e)
+{
+    if (!KURLDrag::canDecode(e))
+        return;
+
+    KURL::List uris;
+    if (KURLDrag::decode(e, uris) && (uris.count() > 0)) {
+        // TODO: Download remote file
+        if (uris.first().isLocalFile())
+           emit imageDropped(uris.first().path());
+    }
+}
+
+void BGMonitor::dragEnterEvent(QDragEnterEvent *e)
+{
+    if (KURLDrag::canDecode(e))
+        e->accept(rect());
+    else
+        e->ignore(rect());
+}
+//END class BGMonitor
+
+#include "bgmonitor.moc"