fix a regression bug when an interface appears or disappears

1 files changed, 40 insertions, 34 deletions

diff --git a/noncore/applets/wirelessapplet/wireless.cpp b/noncore/applets/wirelessapplet/wireless.cpp
index 72ac380..cee789c 100644
--- a/noncore/applets/wirelessapplet/wireless.cpp
+++ b/noncore/applets/wirelessapplet/wireless.cpp
@@ -37,34 +37,34 @@
 #include <qslider.h>
 #include <qbuttongroup.h>
 #include <qlayout.h>
 #include <qframe.h>
 #include <qpixmap.h>
 #include <qstring.h>
 #include <qfile.h>
 #include <qtextstream.h>
 
 /* STD */
 #include <sys/types.h>
 #include <signal.h>
 
 #define STYLE_BARS 0
 #define STYLE_ANTENNA 1
 
-#define MDEBUG
-//#undef MDEBUG
+//#define MDEBUG
+#undef MDEBUG
 
 WirelessControl::WirelessControl( WirelessApplet *applet, QWidget *parent, const char *name )
         : QFrame( parent, name, WStyle_StaysOnTop | WType_Popup ), applet( applet )
 {
 
     readConfig();
     writeConfigEntry( "UpdateFrequency", updateFrequency );
     writeConfigEntry( "DisplayStyle", displayStyle );
 
     setFrameStyle( QFrame::PopupPanel | QFrame::Raised );
     QGridLayout *grid = new QGridLayout( this, 3, 2, 6, 2, "top layout" );
 
     /* status label */
 
     statusLabel = new QLabel( this, "statuslabel" );
     QString text( "Wireless Status:<br>"
@@ -206,32 +206,33 @@ void WirelessControl::writeConfigEntry( const char *entry, int val )
 //===========================================================================
 
 WirelessApplet::WirelessApplet( QWidget *parent, const char *name )
         : QWidget( parent, name ), visualStyle( STYLE_ANTENNA ),
         timer( 0 ), interface( 0 ), oldiface( 0 ),
         rocESSID( false ), rocFREQ( false ), rocAP( false ), rocMODE( false )
 {
     setFixedHeight( 18 );
     setFixedWidth( 14 );
     status = new WirelessControl( this, this, "wireless status" );
 }
 
 void WirelessApplet::checkInterface()
 {
     interface = 0L;
     ONetwork* net = ONetwork::instance();
+    net->synchronize();
     ONetwork::InterfaceIterator it = net->iterator();
 
     while ( it.current() && !it.current()->isWireless() ) ++it;
 
     if ( it.current() && it.current()->isWireless() )
         interface = static_cast<OWirelessNetworkInterface*>( it.current() );
 
     if ( interface )
     {
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: using interface '%s'", ( const char* ) interface->name() );
 #endif
 
     }
     else
     {
@@ -311,205 +312,210 @@ void WirelessApplet::updateDelayChange( int delay )
     if ( delay == 0 )
         delay = 50;
     timer = startTimer( delay );
 }
 
 void WirelessApplet::displayStyleChange( int style )
 {
     visualStyle = style;
     repaint();
 }
 
 WirelessApplet::~WirelessApplet()
 {}
 
 void WirelessApplet::timerEvent( QTimerEvent* )
 {
+#ifdef MDEBUG
     qDebug( "WirelessApplet::timerEvent" );
-    OWirelessNetworkInterface* iface = interface;
-
-    if ( iface )
+#endif
+    if ( interface )
+    {
+        if ( !ONetwork::instance()->isPresent( (const char*) interface->name() ) )
     {
+#ifdef MDEBUG
+            qDebug( "WIFIAPPLET: Interface no longer present." );
+#endif
+            interface = 0L;
+            mustRepaint();
+            return;
+        }
+
         if ( mustRepaint() )
         {
+#ifdef MDEBUG
             qDebug( "WIFIAPPLET: A value has changed -> repainting." );
+#endif
             repaint();
         }
 
         if ( status->isVisible() )
         {
             updatePopupWindow();
         }
     }
     else
     {
         checkInterface();
     }
 }
 
 void WirelessApplet::mousePressEvent( QMouseEvent * )
 {
     if ( status->isVisible() )
         status->hide();
     else
         status->show( true );
 }
 
 bool WirelessApplet::mustRepaint()
 {
-    OWirelessNetworkInterface* iface = interface;
-
     // check if there are enough changes to justify a (flickering) repaint
 
     // has the interface changed?
 
-    if ( iface != oldiface )
+    if ( interface != oldiface )
     {
-        oldiface = iface;
-        if ( iface )
+        oldiface = interface;
+        if ( interface )
         {
 #ifdef MDEBUG
             qDebug( "WIFIAPPLET: We had no interface but now we have one! :-)" );
 #endif
             show();
         }
         else
         {
 #ifdef MDEBUG
             qDebug( "WIFIAPPLET: We had a interface but now we don't have one! ;-(" );
 #endif
             hide();
             return true;
         }
     }
 
     const char** pixmap = getQualityPixmap();
 
     if ( pixmap && ( pixmap != oldpixmap ) )
     {
         oldpixmap = pixmap;
         return true;
     }
 
     int noiseH = 50; // iface->noisePercent() * ( height() - 3 ) / 100;
-    int signalH = iface->signalStrength() * ( height() - 3 ) / 100;
+    int signalH = interface->signalStrength() * ( height() - 3 ) / 100;
     int qualityH = 50; // iface->qualityPercent() * ( height() - 3 ) / 100;
 
     if ( ( noiseH != oldnoiseH )
             || ( signalH != oldsignalH )
             || ( qualityH != oldqualityH ) )
     {
         oldnoiseH = noiseH;
         oldsignalH = signalH;
         oldqualityH = qualityH;
         return true;
     }
 
-    if ( rocESSID && ( oldESSID != iface->SSID() ) )
+    if ( rocESSID && ( oldESSID != interface->SSID() ) )
     {
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: ESSID has changed." );
 #endif
         renewDHCP();
     }
-    else if ( rocFREQ && ( oldFREQ != iface->frequency() ) )
+    else if ( rocFREQ && ( oldFREQ != interface->frequency() ) )
     {
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: FREQ has changed." );
 #endif
         renewDHCP();
     }
-    else if ( rocAP && ( oldAP != iface->associatedAP().toString() ) )
+    else if ( rocAP && ( oldAP != interface->associatedAP().toString() ) )
     {
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: AP has changed." );
 #endif
         renewDHCP();
     }
-    else if ( rocMODE && ( oldMODE != iface->mode() ) )
+    else if ( rocMODE && ( oldMODE != interface->mode() ) )
     {
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: MODE has changed." );
 #endif
         renewDHCP();
     }
 
-    oldESSID = iface->SSID();
-    oldMODE = iface->mode();
-    oldFREQ = iface->frequency();
-    oldAP = iface->associatedAP().toString();
+    oldESSID = interface->SSID();
+    oldMODE = interface->mode();
+    oldFREQ = interface->frequency();
+    oldAP = interface->associatedAP().toString();
 
     return false;
 }
 
 void WirelessApplet::updatePopupWindow()
 {
-    OWirelessNetworkInterface* iface = interface;
-    int qualityH = iface->signalStrength();
+    int qualityH = interface->signalStrength();
 
     if ( status->mgraph )
         status->mgraph->addValue( qualityH, false );
 
     QString freqString;
-    QString cell = ( iface->mode() == "Managed" ) ? "AP: " : "Cell: ";
-    freqString.sprintf( "%.3f GHz", iface->frequency() );
-    status->statusLabel->setText( "Station: " + iface->nickName() + "<br>" +
-                                  "ESSID: " + iface->SSID() + "<br>" +
-                                  "MODE: " + iface->mode() + "<br>" +
+    QString cell = ( interface->mode() == "Managed" ) ? "AP: " : "Cell: ";
+    freqString.sprintf( "%.3f GHz", interface->frequency() );
+    status->statusLabel->setText( "Station: " + interface->nickName() + "<br>" +
+                                  "ESSID: " + interface->SSID() + "<br>" +
+                                  "MODE: " + interface->mode() + "<br>" +
                                   "FREQ: " + freqString + "<br>" +
-                                  cell + " " + iface->associatedAP().toString() );
+                                  cell + " " + interface->associatedAP().toString() );
 }
 
 const char** WirelessApplet::getQualityPixmap()
 {
-    OWirelessNetworkInterface* iface = interface;
-
-    if ( !iface ) return ( const char** ) nowireless_xpm;
-    int qualityH = iface->signalStrength();
+    if ( !interface ) return ( const char** ) nowireless_xpm;
+    int qualityH = interface->signalStrength();
     if ( qualityH < 0 ) return ( const char** ) nowireless_xpm;
 
     if ( visualStyle == STYLE_ANTENNA )
     {
         if ( qualityH < 1 ) return ( const char** ) connect0_xpm;
         if ( qualityH < 17 ) return ( const char** ) connect1_xpm;
         if ( qualityH < 34 ) return ( const char** ) connect2_xpm;
         if ( qualityH < 50 ) return ( const char** ) connect3_xpm;
         if ( qualityH < 65 ) return ( const char** ) connect4_xpm;
         return ( const char** ) connect5_xpm;
     }
 
     return 0; // please draw your bars
 }
 
 void WirelessApplet::paintEvent( QPaintEvent* )
 {
-    OWirelessNetworkInterface* iface = interface;
-
     QPainter p( this );
     QColor color;
 
     const char** pixmap = getQualityPixmap();
 
     if ( pixmap )
         p.drawPixmap( 0, 1, pixmap );
     else
     {
 
         int noiseH = 30; // iface->noisePercent() * ( height() - 3 ) / 100;
         int signalH = 50; // iface->signalPercent() * ( height() - 3 ) / 100;
-        int qualityH = iface->signalStrength(); // iface->qualityPercent() * ( height() - 3 ) / 100;
+        int qualityH = interface->signalStrength(); // iface->qualityPercent() * ( height() - 3 ) / 100;
 
         double intensity;
         int pixelHeight;
         int pixelWidth = 2;
         int Hue;
         int barSpace = 3;
         int leftoffset = 0;
         int bottomoffset = 2;
 
         // draw noise indicator
         pixelHeight = noiseH;
         Hue = 50;
         for ( int i = 0; i < pixelHeight; ++i )
         {
             intensity = 50 + ( ( double ) i / ( double ) pixelHeight ) * 205;
             color.setHsv( Hue, 255, intensity );