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
@@ -1,557 +1,563 @@
 /**********************************************************************
 ** Copyright (C) 2002-2004 Michael 'Mickey' Lauer <mickey@vanille.de>
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 **********************************************************************/
 
 #include "wireless.h"
 #include "mgraph.h"
 #include "advancedconfig.h"
 #include "connect0.xpm"
 #include "connect1.xpm"
 #include "connect2.xpm"
 #include "connect3.xpm"
 #include "connect4.xpm"
 #include "connect5.xpm"
 #include "nowireless.xpm"
 
 /* OPIE */
 #include <opie2/onetwork.h>
 #include <opie2/otaskbarapplet.h>
 #include <qpe/qpeapplication.h>
 #include <qpe/config.h>
 
 /* QT */
 #include <qpoint.h>
 #include <qradiobutton.h>
 #include <qpushbutton.h>
 #include <qpainter.h>
 #include <qlabel.h>
 #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>"
                   "*** Unknown ***<br>"
                   "Card not inserted ?<br>"
                   "Or Sharp ROM ?<br>"
                   "CELL: 00:00:00:00:00:00" );
     /*    QString text( "Station: Unknown<br>"
                             "ESSID: Unknown<br>"
                         "MODE: Unknown<br>"
                         "FREQ: Unknown<br>"
                         "CELL: AA:BB:CC:DD:EE:FF" ); */
     statusLabel->setText( text );
     statusLabel->setFixedSize( statusLabel->sizeHint() );
     grid->addWidget( statusLabel, 0, 0 );
 
     /* visualization group box */
 
     QButtonGroup* group = new QButtonGroup( 1, Qt::Horizontal, "Visualization", this );
     QRadioButton* r1 = new QRadioButton( "Color Bars", group );
     QRadioButton* r2 = new QRadioButton( "Antenna", group );
     r1->setFocusPolicy( QWidget::NoFocus );
     r2->setFocusPolicy( QWidget::NoFocus );
     group->setFocusPolicy( QWidget::NoFocus );
     group->setButton( displayStyle );
     grid->addWidget( group, 0, 1 );
 
     /* quality graph */
 
     mgraph = new MGraph( this );
     mgraph->setFrameStyle( QFrame::Panel | QFrame::Sunken );
     mgraph->setMin( 0 );
     mgraph->setMax( 92 );
     grid->addWidget( mgraph, 1, 0 );
     mgraph->setFocusPolicy( QWidget::NoFocus );
 
     /* advanced configuration Button */
 
     QPushButton* advanced = new QPushButton( "Advanced...", this );
     advanced->setFocusPolicy( QWidget::NoFocus );
     grid->addWidget( advanced, 2, 0, Qt::AlignCenter );
     connect( advanced, SIGNAL( clicked() ),
              this, SLOT( advancedConfigClicked() ) );
 
     /* update Frequency Label */
 
     updateLabel = new QLabel( this );
     text.sprintf( "Update every %d s", updateFrequency );
     updateLabel->setText( text );
     grid->addWidget( updateLabel, 2, 1 );
 
     /* update Frequency Slider */
 
     QSlider* updateSlider = new QSlider( QSlider::Horizontal, this );
     updateSlider->setRange( 0, 9 );
     updateSlider->setValue( updateFrequency );
     updateSlider->setTickmarks( QSlider::Both );
     updateSlider->setTickInterval( 1 );
     updateSlider->setSteps( 1, 1 );
     updateSlider->setFocusPolicy( QWidget::NoFocus );
     grid->addWidget( updateSlider, 1, 1 );
     connect( updateSlider, SIGNAL( valueChanged( int ) ),
              this, SLOT( updateDelayChange( int ) ) );
 
     setFixedSize( sizeHint() );
     setFocusPolicy( QWidget::NoFocus );
 
     applet->displayStyleChange( displayStyle );
     applet->updateDelayChange( updateFrequency );
 
     connect( group, SIGNAL( clicked( int ) ),
              this, SLOT( displayStyleChange( int ) ) );
 
     applet->updateDHCPConfig( rocESSID, rocFREQ, rocAP, rocMODE );
 }
 
 void WirelessControl::advancedConfigClicked()
 {
     AdvancedConfig * a = new AdvancedConfig( this, "dialog", TRUE );
     int result = a->exec();
     a->hide();
     delete a;
     if ( result == QDialog::Accepted )
     {
         readConfig();
         applet->updateDHCPConfig( rocESSID, rocFREQ, rocAP, rocMODE );
     }
 }
 
 void WirelessControl::updateDelayChange( int delay )
 {
     QString text;
     text.sprintf( "Update every %d s", delay );
     updateLabel->setText( text );
     applet->updateDelayChange( delay );
     writeConfigEntry( "UpdateFrequency", delay );
 }
 
 void WirelessControl::displayStyleChange( int style )
 {
     applet->displayStyleChange( style );
     writeConfigEntry( "DisplayStyle", style );
 }
 
 void WirelessControl::show ( bool )
 {
     QPoint curPos = applet->mapToGlobal( QPoint ( 0, 0 ) );
 
     int w = sizeHint().width();
     int x = curPos.x() - ( w / 2 );
 
     if ( ( x + w ) > QPEApplication::desktop() ->width() )
         x = QPEApplication::desktop ( ) -> width ( ) - w;
 
     move( x, curPos.y () - sizeHint().height () );
     QFrame::show();
 }
 
 void WirelessControl::readConfig()
 {
     Config cfg( "qpe" );
     cfg.setGroup( "Wireless" );
 
     updateFrequency = cfg.readNumEntry( "UpdateFrequency", 2 );
     displayStyle = cfg.readNumEntry( "DisplayStyle", STYLE_ANTENNA );
     rocESSID = cfg.readBoolEntry( "renew_dhcp_on_essid_change", false );
     rocFREQ = cfg.readBoolEntry( "renew_dhcp_on_freq_change", false );
     rocAP = cfg.readBoolEntry( "renew_dhcp_on_ap_change", false );
     rocMODE = cfg.readBoolEntry( "renew_dhcp_on_mode_change", false );
 }
 
 void WirelessControl::writeConfigEntry( const char *entry, int val )
 {
     Config cfg( "qpe" );
     cfg.setGroup( "Wireless" );
     cfg.writeEntry( entry, 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
     {
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: D'oh! No Wireless interface present... :(" );
 #endif
         hide();
     }
 }
 
 void WirelessApplet::renewDHCP()
 {
 #ifdef MDEBUG
     qDebug( "WIFIAPPLET: Going to request a DHCP configuration renew." );
 #endif
 
     QString pidfile;
     if ( !interface )
         return ;
     QString ifacename( interface->name() );
 
     // At first we are trying dhcpcd
 
     pidfile.sprintf( "/var/run/dhcpcd-%s.pid", ( const char* ) ifacename );
 #ifdef MDEBUG
     qDebug( "WIFIAPPLET: dhcpcd pidfile is '%s'", ( const char* ) pidfile );
 #endif
     int pid;
     QFile pfile( pidfile );
     bool hasFile = pfile.open( IO_ReadOnly );
     QTextStream s( &pfile );
     if ( hasFile )
     {
         s >> pid;
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: sent SIGALARM to pid %d", pid );
 #endif
         kill( pid, SIGALRM );
         return ;
     }
 
     // No dhcpcd, so we are trying udhcpc
 #ifdef MDEBUG
     qDebug( "WIFIAPPLET: dhcpcd not available." );
 #endif
     pidfile.sprintf( "/var/run/udhcpc.%s.pid", ( const char* ) ifacename );
 #ifdef MDEBUG
     qDebug( "WIFIAPPLET: udhcpc pidfile is '%s'", ( const char* ) pidfile );
 #endif
     QFile pfile2( pidfile );
     hasFile = pfile2.open( IO_ReadOnly );
     QTextStream s2( &pfile2 );
     if ( hasFile )
     {
         s2 >> pid;
 #ifdef MDEBUG
         qDebug( "WIFIAPPLET: sent SIGUSR1 to pid %d", pid );
 #endif
         kill( pid, SIGUSR1 );
         return ;
     }
 }
 
 void WirelessApplet::updateDHCPConfig( bool ESSID, bool FREQ, bool AP, bool MODE )
 {
     rocESSID = ESSID;
     rocFREQ = FREQ;
     rocAP = AP;
     rocMODE = MODE;
 }
 
 void WirelessApplet::updateDelayChange( int delay )
 {
     if ( timer )
         killTimer( timer );
     delay *= 1000;
     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 );
             p.setPen ( color );
             p.drawLine( leftoffset, height() - bottomoffset - i, pixelWidth + leftoffset, height() - bottomoffset - i );
         }
 
         // draw signal indicator
         pixelHeight = signalH;
         Hue = 100;
         leftoffset += pixelWidth + barSpace;
         for ( int i = 0; i < pixelHeight; ++i )
         {
             intensity = 50 + ( ( double ) i / ( double ) pixelHeight ) * 205;
             color.setHsv( Hue, 255, intensity );
             p.setPen ( color );
             p.drawLine( leftoffset, height() - bottomoffset - i, pixelWidth + leftoffset, height() - bottomoffset - i );
         }
 
         // draw quality indicator
         pixelHeight = qualityH;
         Hue = 250;
         leftoffset += pixelWidth + barSpace;
         for ( int i = 0; i < pixelHeight; ++i )
         {
             intensity = 50 + ( ( double ) i / ( double ) pixelHeight ) * 205;
             color.setHsv( Hue, 255, intensity );
             p.setPen ( color );
             p.drawLine( leftoffset, height() - bottomoffset - i, pixelWidth + leftoffset, height() - bottomoffset - i );
         }
     }
 }
 
 
 int WirelessApplet::position()
 {
     return 6;
 }
 
 
 Q_EXPORT_INTERFACE()
 {
     Q_CREATE_INSTANCE( OTaskbarAppletWrapper<WirelessApplet> );
 }