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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(repaint()));
#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) {
repaint(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 ) repaint(true);
}
void KRootBacking::repaint()
{
repaint(false);
}
void KRootBacking::repaint(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)
repaint(true);
}
#include "krootbacking.moc"
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