krootpixmap.cpp
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00012 #include <qwidget.h>
00013 #include <qtimer.h>
00014 #include <qrect.h>
00015 #include <qimage.h>
00016
00017 #ifndef Q_WS_QWS //FIXME
00018 #include <kapplication.h>
00019 #include <kimageeffect.h>
00020 #include <kpixmapio.h>
00021 #include <kwinmodule.h>
00022 #include <kwin.h>
00023 #include <kdebug.h>
00024 #include <netwm.h>
00025 #include <dcopclient.h>
00026 #include <dcopref.h>
00027
00028 #include <ksharedpixmap.h>
00029 #include <krootpixmap.h>
00030
00031
00032 static QString wallpaperForDesktop(int desktop)
00033 {
00034 return DCOPRef("kdesktop", "KBackgroundIface").call("currentWallpaper", desktop);
00035 }
00036
00037 class KRootPixmapData
00038 {
00039 public:
00040 QWidget *toplevel;
00041 KWinModule *kwin;
00042 };
00043
00044
00045 KRootPixmap::KRootPixmap( QWidget *widget, const char *name )
00046 : QObject(widget, name ? name : "KRootPixmap" ), m_Desk(0), m_pWidget(widget)
00047 {
00048 init();
00049 }
00050
00051 KRootPixmap::KRootPixmap( QWidget *widget, QObject *parent, const char *name )
00052 : QObject( parent, name ? name : "KRootPixmap" ), m_Desk(0), m_pWidget(widget)
00053 {
00054 init();
00055 }
00056
00057 void KRootPixmap::init()
00058 {
00059 d = new KRootPixmapData;
00060 m_Fade = 0;
00061 m_pPixmap = new KSharedPixmap;
00062 m_pTimer = new QTimer( this );
00063 m_bInit = false;
00064 m_bActive = false;
00065 m_bCustomPaint = false;
00066
00067 connect(kapp, SIGNAL(backgroundChanged(int)), SLOT(slotBackgroundChanged(int)));
00068 connect(m_pPixmap, SIGNAL(done(bool)), SLOT(slotDone(bool)));
00069 connect(m_pTimer, SIGNAL(timeout()), SLOT(repaint()));
00070
00071 d->kwin = new KWinModule( this );
00072 connect(d->kwin, SIGNAL(windowChanged(WId, unsigned int)), SLOT(desktopChanged(WId, unsigned int)));
00073 connect(d->kwin, SIGNAL(currentDesktopChanged(int)), SLOT(desktopChanged(int)));
00074
00075 d->toplevel = m_pWidget->topLevelWidget();
00076 d->toplevel->installEventFilter(this);
00077 m_pWidget->installEventFilter(this);
00078 }
00079
00080 KRootPixmap::~KRootPixmap()
00081 {
00082 delete m_pPixmap;
00083 delete d;
00084 }
00085
00086
00087 int KRootPixmap::currentDesktop() const
00088 {
00089 NETRootInfo rinfo( qt_xdisplay(), NET::CurrentDesktop );
00090 rinfo.activate();
00091 return rinfo.currentDesktop();
00092 }
00093
00094
00095 void KRootPixmap::start()
00096 {
00097 if (m_bActive)
00098 return;
00099
00100 m_bActive = true;
00101 if ( !isAvailable() )
00102 {
00103
00104 enableExports();
00105 return;
00106 }
00107 if (m_bInit)
00108 repaint(true);
00109 }
00110
00111
00112 void KRootPixmap::stop()
00113 {
00114 m_bActive = false;
00115 m_pTimer->stop();
00116 }
00117
00118
00119 void KRootPixmap::setFadeEffect(double fade, const QColor &color)
00120 {
00121 if (fade < 0)
00122 m_Fade = 0;
00123 else if (fade > 1)
00124 m_Fade = 1;
00125 else
00126 m_Fade = fade;
00127 m_FadeColor = color;
00128
00129 if ( m_bActive && m_bInit ) repaint(true);
00130 }
00131
00132
00133 bool KRootPixmap::eventFilter(QObject *, QEvent *event)
00134 {
00135
00136 if (!m_bInit && ((event->type() == QEvent::Show) || (event->type() == QEvent::Paint)))
00137 {
00138 m_bInit = true;
00139 m_Desk = currentDesktop();
00140 }
00141
00142 if (!m_bActive)
00143 return false;
00144
00145 switch (event->type())
00146 {
00147 case QEvent::Resize:
00148 case QEvent::Move:
00149 m_pTimer->start(100, true);
00150 break;
00151
00152 case QEvent::Paint:
00153 m_pTimer->start(0, true);
00154 break;
00155
00156 case QEvent::Reparent:
00157 d->toplevel->removeEventFilter(this);
00158 d->toplevel = m_pWidget->topLevelWidget();
00159 d->toplevel->installEventFilter(this);
00160 break;
00161
00162 default:
00163 break;
00164 }
00165
00166 return false;
00167 }
00168
00169 void KRootPixmap::desktopChanged(int desktop)
00170 {
00171 if (wallpaperForDesktop(m_Desk) == wallpaperForDesktop(desktop) &&
00172 !wallpaperForDesktop(m_Desk).isNull())
00173 return;
00174
00175 if (KWin::windowInfo(m_pWidget->topLevelWidget()->winId()).desktop() == NET::OnAllDesktops &&
00176 pixmapName(m_Desk) != pixmapName(desktop))
00177 repaint(true);
00178 }
00179
00180 void KRootPixmap::desktopChanged( WId window, unsigned int properties )
00181 {
00182 if( (properties & NET::WMDesktop) == 0 ||
00183 (window != m_pWidget->topLevelWidget()->winId()))
00184 return;
00185
00186 kdDebug() << k_funcinfo << endl;
00187 repaint(true);
00188 }
00189
00190 void KRootPixmap::repaint()
00191 {
00192 repaint(false);
00193 }
00194
00195
00196 void KRootPixmap::repaint(bool force)
00197 {
00198 QPoint p1 = m_pWidget->mapToGlobal(m_pWidget->rect().topLeft());
00199 QPoint p2 = m_pWidget->mapToGlobal(m_pWidget->rect().bottomRight());
00200 if (!force && (m_Rect == QRect(p1, p2)))
00201 return;
00202
00203
00204
00205
00206
00207 if ((p1 == m_Rect.topLeft()) && (m_pWidget->width() < m_Rect.width()) &&
00208 (m_pWidget->height() < m_Rect.height())
00209 )
00210 {
00211 m_Rect = QRect(p1, p2);
00212 updateBackground( m_pPixmap );
00213 return;
00214 }
00215 m_Rect = QRect(p1, p2);
00216 m_Desk = KWin::windowInfo(m_pWidget->topLevelWidget()->winId()).desktop();
00217 if (m_Desk == NET::OnAllDesktops)
00218 m_Desk = currentDesktop();
00219
00220
00221 m_pPixmap->loadFromShared(pixmapName(m_Desk), m_Rect);
00222 }
00223
00224 bool KRootPixmap::isAvailable() const
00225 {
00226 return m_pPixmap->isAvailable(pixmapName(m_Desk));
00227 }
00228
00229 QString KRootPixmap::pixmapName(int desk) {
00230 QString pattern = QString("DESKTOP%1");
00231 int screen_number = DefaultScreen(qt_xdisplay());
00232 if (screen_number) {
00233 pattern = QString("SCREEN%1-DESKTOP").arg(screen_number) + "%1";
00234 }
00235 return pattern.arg( desk );
00236 }
00237
00238
00239 void KRootPixmap::enableExports()
00240 {
00241 kdDebug(270) << k_lineinfo << "activating background exports.\n";
00242 DCOPClient *client = kapp->dcopClient();
00243 if (!client->isAttached())
00244 client->attach();
00245 QByteArray data;
00246 QDataStream args( data, IO_WriteOnly );
00247 args << 1;
00248
00249 QCString appname( "kdesktop" );
00250 int screen_number = DefaultScreen(qt_xdisplay());
00251 if ( screen_number )
00252 appname.sprintf("kdesktop-screen-%d", screen_number );
00253
00254 client->send( appname, "KBackgroundIface", "setExport(int)", data );
00255 }
00256
00257
00258 void KRootPixmap::slotDone(bool success)
00259 {
00260 if (!success)
00261 {
00262 kdWarning(270) << k_lineinfo << "loading of desktop background failed.\n";
00263 return;
00264 }
00265
00266
00267
00268 if ( m_bActive )
00269 updateBackground( m_pPixmap );
00270 }
00271
00272 void KRootPixmap::updateBackground( KSharedPixmap *spm )
00273 {
00274 QPixmap pm = *spm;
00275
00276 if (m_Fade > 1e-6)
00277 {
00278 KPixmapIO io;
00279 QImage img = io.convertToImage(pm);
00280 img = KImageEffect::fade(img, m_Fade, m_FadeColor);
00281 pm = io.convertToPixmap(img);
00282 }
00283
00284 if ( !m_bCustomPaint )
00285 m_pWidget->setBackgroundPixmap( pm );
00286 else {
00287 emit backgroundUpdated( pm );
00288 }
00289 }
00290
00291
00292 void KRootPixmap::slotBackgroundChanged(int desk)
00293 {
00294 if (!m_bInit || !m_bActive)
00295 return;
00296
00297 if (desk == m_Desk)
00298 repaint(true);
00299 }
00300
00301 #include "krootpixmap.moc"
00302 #endif
This file is part of the documentation for kdeui Library Version 3.3.2.