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-rw-r--r--kscreensaver/krootbacking/krootbacking.cpp262
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diff --git a/kscreensaver/krootbacking/krootbacking.cpp b/kscreensaver/krootbacking/krootbacking.cpp
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+/***************************************************************************
+ * Copyright (C) 2011 by Timothy Pearson <kb9vqf@pearsoncomputing.net> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program 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 General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
+ ***************************************************************************/
+
+#include <tqwidget.h>
+#include <tqtimer.h>
+#include <tqrect.h>
+#include <tqimage.h>
+
+#include <kapplication.h>
+#include <kimageeffect.h>
+#include <kpixmapio.h>
+#include <kwinmodule.h>
+#include <kwin.h>
+#include <kdebug.h>
+#include <netwm.h>
+#include <dcopclient.h>
+#include <dcopref.h>
+
+#include <ksharedpixmap.h>
+#include <kstandarddirs.h>
+#include <krootbacking.h>
+
+static TQString wallpaperForDesktop(int desktop)
+{
+ return DCOPRef("kdesktop", "KBackgroundIface").call("currentWallpaper", desktop);
+}
+
+class KRootBackingData
+{
+public:
+ TQWidget *toplevel;
+#ifdef Q_WS_X11
+ KWinModule *kwin;
+#endif
+};
+
+
+KRootBacking::KRootBacking()
+ : TQObject(KApplication::desktop(), "KRootBacking" ), m_Desk(0), m_timeout(0)
+{
+ init();
+}
+
+void KRootBacking::init()
+{
+ d = new KRootBackingData;
+ m_Fade = 0;
+ m_pPixmap = new KSharedPixmap; //ordinary KPixmap on win32
+ m_pTimer = new TQTimer( this );
+ m_bInit = false;
+ m_bActive = false;
+
+ connect(kapp, TQT_SIGNAL(backgroundChanged(int)), TQT_SLOT(slotBackgroundChanged(int)));
+ connect(m_pTimer, TQT_SIGNAL(timeout()), TQT_SLOT(tqrepaint()));
+#ifdef Q_WS_X11
+ connect(m_pPixmap, TQT_SIGNAL(done(bool)), TQT_SLOT(slotDone(bool)));
+
+ d->kwin = new KWinModule( this );
+#endif
+
+ m_bInit = true;
+}
+
+KRootBacking::~KRootBacking()
+{
+ delete m_pPixmap;
+ delete d;
+}
+
+
+int KRootBacking::currentDesktop() const
+{
+#ifdef Q_WS_X11
+ NETRootInfo rinfo( qt_xdisplay(), NET::CurrentDesktop );
+ rinfo.activate();
+ return rinfo.currentDesktop();
+#endif
+}
+
+
+void KRootBacking::start()
+{
+ if (m_bActive)
+ return;
+
+ m_bActive = true;
+ if ( !isAvailable() )
+ {
+ // We should get a KIPC message when the shared pixmap is available...
+ enableExports();
+ if (m_timeout < 50) {
+ TQTimer::singleShot( 100, this, SLOT(show()) ); // ...but it doesn't always work!
+ m_timeout++;
+ return;
+ }
+ }
+ if (m_bInit) {
+ tqrepaint(true);
+ }
+}
+
+
+void KRootBacking::stop()
+{
+ m_bActive = false;
+ m_pTimer->stop();
+}
+
+
+void KRootBacking::setFadeEffect(double fade, const TQColor &color)
+{
+ if (fade < 0)
+ m_Fade = 0;
+ else if (fade > 1)
+ m_Fade = 1;
+ else
+ m_Fade = fade;
+ m_FadeColor = color;
+
+ if ( m_bActive && m_bInit ) tqrepaint(true);
+}
+
+void KRootBacking::tqrepaint()
+{
+ tqrepaint(false);
+}
+
+
+void KRootBacking::tqrepaint(bool force)
+{
+ TQWidget* desktopWidget = KApplication::desktop();
+ TQPoint p1 = desktopWidget->mapToGlobal(desktopWidget->rect().topLeft());
+ TQPoint p2 = desktopWidget->mapToGlobal(desktopWidget->rect().bottomRight());
+ if (!force && (m_Rect == TQRect(p1, p2)))
+ return;
+
+ m_Rect = TQRect(p1, p2);
+#ifdef Q_WS_X11
+ m_Desk = currentDesktop();
+
+ // KSharedPixmap will correctly generate a tile for us.
+ m_pPixmap->loadFromShared(pixmapName(m_Desk), m_Rect);
+#else
+ m_Desk = currentDesktop();
+ // !x11 note: tile is not generated!
+ // TODO: pixmapName() is a nonsense now!
+ m_pPixmap->load( pixmapName(m_Desk) );
+ if (!m_pPixmap->isNull()) {
+ m_pPixmap->resize( m_Rect.size() );
+ slotDone(true);
+ }
+#endif
+}
+
+bool KRootBacking::isAvailable() const
+{
+// #ifdef Q_WS_X11
+// return m_pPixmap->isAvailable(pixmapName(m_Desk));
+// #else
+ return m_pPixmap->isNull();
+// #endif
+}
+
+TQString KRootBacking::pixmapName(int desk) {
+ TQString pattern = TQString("DESKTOP%1");
+#ifdef Q_WS_X11
+ int screen_number = DefaultScreen(qt_xdisplay());
+ if (screen_number) {
+ pattern = TQString("SCREEN%1-DESKTOP").arg(screen_number) + "%1";
+ }
+#endif
+ return pattern.arg( desk );
+}
+
+
+void KRootBacking::enableExports()
+{
+#ifdef Q_WS_X11
+ kdDebug(270) << k_lineinfo << "activating background exports.\n";
+ DCOPClient *client = kapp->dcopClient();
+ if (!client->isAttached())
+ client->attach();
+ TQByteArray data;
+ TQDataStream args( data, IO_WriteOnly );
+ args << 1;
+
+ TQCString appname( "kdesktop" );
+ int screen_number = DefaultScreen(qt_xdisplay());
+ if ( screen_number )
+ appname.sprintf("kdesktop-screen-%d", screen_number );
+
+ client->send( appname, "KBackgroundIface", "setExport(int)", data );
+#endif
+}
+
+
+void KRootBacking::slotDone(bool success)
+{
+ if (!success)
+ {
+ kdWarning(270) << k_lineinfo << "loading of desktop background failed.\n";
+ if (m_timeout < 50) {
+ TQTimer::singleShot( 100, this, SLOT(show()) );
+ m_timeout++;
+ return;
+ }
+ }
+
+ // We need to test active as the pixmap might become available
+ // after the widget has been destroyed.
+ if ( m_bActive )
+ updateBackground( m_pPixmap );
+}
+
+void KRootBacking::updateBackground( KSharedPixmap *spm )
+{
+ TQPixmap pm = *spm;
+
+ if (m_Fade > 1e-6)
+ {
+ KPixmapIO io;
+ TQImage img = io.convertToImage(pm);
+ img = KImageEffect::fade(img, m_Fade, m_FadeColor);
+ pm = io.convertToPixmap(img);
+ }
+
+ TQString filename = getenv("USER");
+ filename.prepend("/tmp/kde-");
+ filename.append("/krootbacking.png");
+ pm.save(filename, "PNG");
+ printf("%s\n\r", filename.ascii()); fflush(stdout);
+ exit(0);
+}
+
+
+void KRootBacking::slotBackgroundChanged(int desk)
+{
+ if (!m_bInit || !m_bActive)
+ return;
+
+ if (desk == m_Desk)
+ tqrepaint(true);
+}
+
+// #include "krootpixmap.moc"
+