diff options
Diffstat (limited to 'kscreensaver/krootbacking/krootbacking.cpp')
| -rw-r--r-- | kscreensaver/krootbacking/krootbacking.cpp | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/kscreensaver/krootbacking/krootbacking.cpp b/kscreensaver/krootbacking/krootbacking.cpp new file mode 100644 index 00000000..4a4d5543 --- /dev/null +++ b/kscreensaver/krootbacking/krootbacking.cpp @@ -0,0 +1,262 @@ +/*************************************************************************** + * 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" + |