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akonadi

erroroverlay.cpp
00001 /*
00002     Copyright (c) 2008 Volker Krause <vkrause@kde.org>
00003 
00004     This library is free software; you can redistribute it and/or modify it
00005     under the terms of the GNU Library General Public License as published by
00006     the Free Software Foundation; either version 2 of the License, or (at your
00007     option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful, but WITHOUT
00010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00012     License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to the
00016     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017     02110-1301, USA.
00018 */
00019 
00020 #include "erroroverlay_p.h"
00021 #include "ui_erroroverlay.h"
00022 #include "selftestdialog_p.h"
00023 
00024 #include <KDebug>
00025 #include <KIcon>
00026 #include <KLocale>
00027 
00028 #include <QtCore/QEvent>
00029 #include <QtGui/QBoxLayout>
00030 #include <QtGui/QLabel>
00031 #include <QtGui/QPalette>
00032 
00033 using namespace Akonadi;
00034 
00035 //@cond PRIVATE
00036 
00037 class ErrorOverlayStatic
00038 {
00039   public:
00040     QVector<QPair<QPointer<QWidget>, QPointer<QWidget> > > baseWidgets;
00041 };
00042 
00043 K_GLOBAL_STATIC( ErrorOverlayStatic, sInstanceOverlay )
00044 
00045 static bool isParentOf( QObject* o1, QObject* o2 )
00046 {
00047   if ( !o1 || !o2 )
00048     return false;
00049   if ( o1 == o2 )
00050     return true;
00051   return isParentOf( o1, o2->parent() );
00052 }
00053 
00054 ErrorOverlay::ErrorOverlay( QWidget *baseWidget, QWidget * parent ) :
00055     QWidget( parent ? parent : baseWidget->window() ),
00056     mBaseWidget( baseWidget ),
00057     mBaseWidgetIsParent( false ),
00058     ui( new Ui::ErrorOverlay )
00059 {
00060   Q_ASSERT( baseWidget );
00061 
00062   mBaseWidgetIsParent = isParentOf( mBaseWidget, this );
00063 
00064   // check existing overlays to detect cascading
00065   for ( QVector<QPair< QPointer<QWidget>, QPointer<QWidget> > >::Iterator it = sInstanceOverlay->baseWidgets.begin();
00066         it != sInstanceOverlay->baseWidgets.end(); ) {
00067     if ( (*it).first == 0 || (*it).second == 0 ) {
00068       // garbage collection
00069       it = sInstanceOverlay->baseWidgets.erase( it );
00070       continue;
00071     }
00072     if ( isParentOf( (*it).first, baseWidget ) ) {
00073       // parent already has an overlay, kill ourselves
00074       mBaseWidget = 0;
00075       hide();
00076       deleteLater();
00077       return;
00078     }
00079     if ( isParentOf( baseWidget, (*it).first ) ) {
00080       // child already has overlay, kill that one
00081       delete (*it).second;
00082       it = sInstanceOverlay->baseWidgets.erase( it );
00083       continue;
00084     }
00085     ++it;
00086   }
00087   sInstanceOverlay->baseWidgets.append( qMakePair( mBaseWidget, QPointer<QWidget>( this ) ) );
00088 
00089   connect( baseWidget, SIGNAL(destroyed()), SLOT(deleteLater()) );
00090   mPreviousState = mBaseWidget->isEnabled();
00091 
00092   ui->setupUi( this );
00093   ui->notRunningIcon->setPixmap( KIcon( QLatin1String( "akonadi" ) ).pixmap( 64 ) );
00094   ui->brokenIcon->setPixmap( KIcon( QString::fromLatin1( "dialog-error" ) ).pixmap( 64 ) );
00095   ui->progressIcon->setPixmap( KIcon( QLatin1String( "akonadi" ) ).pixmap( 32 ) );
00096   ui->quitButton->setText( KStandardGuiItem::quit().text() );
00097   ui->detailsQuitButton->setText( KStandardGuiItem::quit().text() );
00098 
00099 #ifndef KDEPIM_MOBILE_UI
00100   ui->quitButton->hide();
00101   ui->detailsQuitButton->hide();
00102 #endif
00103 
00104   connect( ui->startButton, SIGNAL(clicked()), SLOT(startClicked()) );
00105   connect( ui->quitButton, SIGNAL(clicked()), SLOT(quitClicked()) );
00106   connect( ui->detailsQuitButton, SIGNAL(clicked()), SLOT(quitClicked()) );
00107   connect( ui->selfTestButton, SIGNAL(clicked()), SLOT(selfTestClicked()) );
00108 
00109   const ServerManager::State state = ServerManager::state();
00110   mOverlayActive = state == ServerManager::Running;
00111   serverStateChanged( state );
00112   connect( ServerManager::self(), SIGNAL(stateChanged(Akonadi::ServerManager::State)),
00113            SLOT(serverStateChanged(Akonadi::ServerManager::State)) );
00114 
00115   QPalette p = palette();
00116   p.setColor( backgroundRole(), QColor( 0, 0, 0, 128 ) );
00117   p.setColor( foregroundRole(), Qt::white );
00118   setPalette( p );
00119   setAutoFillBackground( true );
00120 
00121   mBaseWidget->installEventFilter( this );
00122 
00123   reposition();
00124 }
00125 
00126 ErrorOverlay::~ ErrorOverlay()
00127 {
00128   if ( mBaseWidget && !mBaseWidgetIsParent )
00129     mBaseWidget->setEnabled( mPreviousState );
00130 }
00131 
00132 void ErrorOverlay::reposition()
00133 {
00134   if ( !mBaseWidget )
00135     return;
00136 
00137   // reparent to the current top level widget of the base widget if needed
00138   // needed eg. in dock widgets
00139   if ( parentWidget() != mBaseWidget->window() )
00140     setParent( mBaseWidget->window() );
00141 
00142   // follow base widget visibility
00143   // needed eg. in tab widgets
00144   if ( !mBaseWidget->isVisible() ) {
00145     hide();
00146     return;
00147   }
00148   if ( mOverlayActive )
00149     show();
00150 
00151   // follow position changes
00152   const QPoint topLevelPos = mBaseWidget->mapTo( window(), QPoint( 0, 0 ) );
00153   const QPoint parentPos = parentWidget()->mapFrom( window(), topLevelPos );
00154   move( parentPos );
00155 
00156   // follow size changes
00157   // TODO: hide/scale icon if we don't have enough space
00158   resize( mBaseWidget->size() );
00159 }
00160 
00161 bool ErrorOverlay::eventFilter(QObject * object, QEvent * event)
00162 {
00163   if ( object == mBaseWidget && mOverlayActive &&
00164     ( event->type() == QEvent::Move || event->type() == QEvent::Resize ||
00165       event->type() == QEvent::Show || event->type() == QEvent::Hide ||
00166       event->type() == QEvent::ParentChange ) ) {
00167     reposition();
00168   }
00169   return QWidget::eventFilter( object, event );
00170 }
00171 
00172 void ErrorOverlay::startClicked()
00173 {
00174   ServerManager::start();
00175 }
00176 
00177 void ErrorOverlay::quitClicked()
00178 {
00179   qApp->quit();
00180 }
00181 
00182 void ErrorOverlay::selfTestClicked()
00183 {
00184   SelfTestDialog dlg;
00185   dlg.exec();
00186 }
00187 
00188 void ErrorOverlay::serverStateChanged( ServerManager::State state )
00189 {
00190   if ( !mBaseWidget )
00191     return;
00192 
00193   if ( state == ServerManager::Running && mOverlayActive ) {
00194     mOverlayActive = false;
00195     hide();
00196     if ( !mBaseWidgetIsParent )
00197       mBaseWidget->setEnabled( mPreviousState );
00198   } else if ( !mOverlayActive ) {
00199     mOverlayActive = true;
00200     if ( mBaseWidget->isVisible() )
00201       show();
00202 
00203     if ( !mBaseWidgetIsParent ) {
00204       mPreviousState = mBaseWidget->isEnabled();
00205       mBaseWidget->setEnabled( false );
00206     }
00207 
00208     reposition();
00209   }
00210 
00211   if ( mOverlayActive ) {
00212     switch ( state ) {
00213       case ServerManager::NotRunning:
00214         ui->stackWidget->setCurrentWidget( ui->notRunningPage );
00215         break;
00216       case ServerManager::Broken:
00217         ui->stackWidget->setCurrentWidget( ui->brokenPage );
00218         break;
00219       case ServerManager::Starting:
00220         ui->progressPage->setToolTip( i18n( "Personal information management service is starting..." ) );
00221         ui->progressDescription->setText( i18n( "Personal information management service is starting..." ) );
00222         ui->stackWidget->setCurrentWidget( ui->progressPage );
00223         break;
00224       case ServerManager::Stopping:
00225         ui->progressPage->setToolTip( i18n( "Personal information management service is shutting down..." ) );
00226         ui->progressDescription->setText( i18n( "Personal information management service is shutting down..." ) );
00227         ui->stackWidget->setCurrentWidget( ui->progressPage );
00228         break;
00229       case ServerManager::Running:
00230         break;
00231     }
00232   }
00233 }
00234 
00235 //@endcond
00236 
00237 #include "erroroverlay_p.moc"
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