Fix floating point exception divide by 0 in qpedecoration

1 files changed, 12 insertions, 11 deletions

diff --git a/library/qpedecoration_qws.cpp b/library/qpedecoration_qws.cpp
index 222d906..c2eb751 100644
--- a/library/qpedecoration_qws.cpp
+++ b/library/qpedecoration_qws.cpp
@@ -11,65 +11,65 @@
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
 **
 ** Contact info@trolltech.com if any conditions of this licensing are
 ** not clear to you.
 **
 **********************************************************************/
 #ifdef QWS
 #define QTOPIA_INTERNAL_LANGLIST
 #include <qapplication.h>
 #include <qstyle.h>
 #include <qwidget.h>
 #include <qpainter.h>
 #include <qtimer.h>
 #include <qwhatsthis.h>
 #include "qcopenvelope_qws.h"
 #include "qpedecoration_qws.h"
 #include <qdialog.h>
 #include <qdrawutil.h>
 #include <qgfx_qws.h>
 #include "qpeapplication.h"
 #include "resource.h"
 #include "global.h"
 #include "qlibrary.h"
 #include "windowdecorationinterface.h"
 #include <qfile.h>
 #include <qsignal.h>
 
 #include <stdlib.h>
 
-extern QRect qt_maxWindowRect; 
+extern QRect qt_maxWindowRect;
 
 #define WHATSTHIS_MODE
 
 #ifndef QT_NO_QWS_QPE_WM_STYLE
 
 #ifndef QT_NO_IMAGEIO_XPM
 
 /* XPM */
 static const char * const qpe_close_xpm[] = {
 "16 16 3 1",
 "       c None",
 ".      c #FFFFFF",
 "+      c #000000",
 "                ",
 "                ",
 "      .....     ",
 "    ..+++++..   ",
 "   .+++++++++.  ",
 "   .+..+++..+.  ",
 "  .++...+...++. ",
 "  .+++.....+++. ",
 "  .++++...++++. ",
 "  .+++.....+++. ",
 "  .++...+...++. ",
 "   .+..+++..+.  ",
 "   .+++++++++.  ",
 "    ..+++++..   ",
 "      .....     ",
 "                "};
 
 /* XPM */
 static const char * const qpe_accept_xpm[] = {
@@ -78,65 +78,66 @@ static const char * const qpe_accept_xpm[] = {
 ".      c #FFFFFF",
 "+      c #000000",
 "                ",
 "                ",
 "      .....     ",
 "    ..+++++..   ",
 "   .+++++++++.  ",
 "   .+++++++++.  ",
 "  .+++++++..++. ",
 "  .++.+++...++. ",
 "  .+...+...+++. ",
 "  .+......++++. ",
 "  .++....+++++. ",
 "   .++..+++++.  ",
 "   .+++++++++.  ",
 "    ..+++++..   ",
 "      .....     ",
 "                "};
 
 #endif // QT_NO_IMAGEIO_XPM
 
 class HackWidget : public QWidget
 {
 public:
     bool needsOk() {
         return (getWState() & WState_Reserved1 ) ||
                  (inherits( "QDialog" ) && !inherits( "QMessageBox" ) );
     }
 };
 
 static QImage scaleButton( const QImage &img, int height )
 {
-    if ( img.height() != height ) {
+    qWarning("Height %d %d",  height, img.height() );
+    if ( img.height()!=0 && img.height() != height ) {
         return img.smoothScale( img.width()*height/img.height(), height );
     } else {
         return img;
     }
 }
 
 class TLWidget : public QWidget
 {
 public:
     QWSManager *manager()
     {
         return topData()->qwsManager;
     }
 
     QTLWExtra *topExtra()
     {
         return topData();
     }
 
     void setWState( uint s ) { QWidget::setWState( s ); }
     void clearWState( uint s ) { QWidget::clearWState( s ); }
 };
 
 
 QPEManager::QPEManager( QPEDecoration *d, QObject *parent )
     : QObject( parent ), decoration( d ), helpState(0), inWhatsThis(FALSE)
 {
     wtTimer = new QTimer( this );
     connect( wtTimer, SIGNAL(timeout()), this, SLOT(whatsThisTimeout()) );
 }
 
 
@@ -618,121 +619,121 @@ QRegion QPEDecoration::region(const QWidget *widget, const QRect &rect, QWSDecor
                 if ( ((HackWidget *)widget)->needsOk() )
                     left -= okWidth;
                 QRect r(left, rect.top() - titleHeight, closeWidth, titleHeight);
                 region = r;
             }
             break;
             case Title:
             if ( !widget->isMaximized() ) {
                 int width = rect.width() - helpWidth - closeWidth;
                 if ( ((HackWidget *)widget)->needsOk() )
                     width -= okWidth;
                 QRect r(rect.left()+helpWidth, rect.top() - titleHeight,
                         width, titleHeight);
                 if (r.width() > 0)
                     region = r;
             }
             break;
         case Help:
             if ( helpExists || widget->testWFlags(Qt::WStyle_ContextHelp) ) {
                 QRect r(rect.left(), rect.top() - titleHeight,
                           helpWidth, titleHeight);
                 region = r;
             }
             break;
         case Top:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 int b = wdiface->metric(WindowDecorationInterface::TopBorder,&wd);
                 region = m & QRect( br.left()+grab, br.top(),
                                     br.width()-2*grab, b );
             }
-            break; 
+            break;
         case Left:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 int b = wdiface->metric(WindowDecorationInterface::LeftBorder,&wd);
                 region = m & QRect( br.left(), br.top()+grab,
                                     b, br.height()-2*grab );
             }
-            break; 
+            break;
         case Right:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 int b = wdiface->metric(WindowDecorationInterface::RightBorder,&wd);
                 region = m & QRect( rect.right(), br.top()+grab,
                                     b, br.height()-2*grab );
             }
-            break; 
+            break;
         case Bottom:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 int b = wdiface->metric(WindowDecorationInterface::BottomBorder,&wd);
                 region = m & QRect( br.left()+grab, rect.bottom(),
                                     br.width()-2*grab, b );
             }
             break;
         case TopLeft:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 int tb = wdiface->metric(WindowDecorationInterface::TopBorder,&wd);
                 int lb = wdiface->metric(WindowDecorationInterface::LeftBorder,&wd);
                 QRegion crgn( br.left(), br.top(), grab, tb );
                 crgn |= QRect( br.left(), br.top(), lb, grab );
                 region = m & crgn;
             }
-            break; 
+            break;
         case TopRight:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 int tb = wdiface->metric(WindowDecorationInterface::TopBorder,&wd);
                 int rb = wdiface->metric(WindowDecorationInterface::RightBorder,&wd);
                 QRegion crgn( br.right()-grab, br.top(), grab, tb );
                 crgn |= QRect( br.right()-rb, br.top(), rb, grab );
                 region = m & crgn;
             }
             break;
         case BottomLeft:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 region = m & QRect( br.left(), br.bottom()-grab, grab, grab );
             }
-            break; 
+            break;
         case BottomRight:
             if ( !widget->isMaximized() ) {
                 QRegion m = wdiface->mask(&wd);
                 QRect br = m.boundingRect();
                 region = m & QRect( br.right()-grab, br.bottom()-grab, grab, grab );
             }
             break;
         case All:
             if ( widget->isMaximized() )
                 region = QWSDefaultDecoration::region(widget, rect, type);
             else
                 region = wdiface->mask(&wd) - rect;
             break;
         default:
             region = QWSDefaultDecoration::region(widget, rect, type);
             break;
     }
 
     return region;
 }
 
 void QPEDecoration::paint(QPainter *painter, const QWidget *widget)
 {
     WindowDecorationInterface::WindowData wd;
     windowData( widget, wd );
 
     int titleWidth = getTitleWidth(widget);
     int titleHeight = wdiface->metric(WindowDecorationInterface::TitleHeight,&wd);
 
     QRect rect(widget->rect());
 
     // title bar rect
@@ -793,96 +794,96 @@ void QPEDecoration::paintButton(QPainter *painter, const QWidget *w,
         case Maximize:
             b = WindowDecorationInterface::Maximize;
             break;
         default:
             return;
     }
 
     WindowDecorationInterface::WindowData wd;
     windowData( w, wd );
 
     int titleHeight = wdiface->metric(WindowDecorationInterface::TitleHeight,&wd);
     QRect rect(w->rect());
     QRect tr( rect.left(), rect.top() - titleHeight, rect.width(), titleHeight );
     QRect brect(region(w, w->rect(), type).boundingRect());
 
     const QColorGroup &cg = w->palette().active();
     if ( wd.flags & WindowDecorationInterface::WindowData::Active )
         painter->setPen( cg.color(QColorGroup::HighlightedText) );
     else
         painter->setPen( cg.color(QColorGroup::Text) );
 
     QRegion oldClip = painter->clipRegion();
     painter->setClipRegion( QRect(brect.x(), tr.y(), brect.width(), tr.height()) ); // reduce flicker
     wdiface->drawArea( WindowDecorationInterface::Title, painter, &wd );
     wdiface->drawButton( b, painter, &wd, brect.x(), brect.y(), brect.width(), brect.height(), (QWSButton::State)state );
     painter->setClipRegion( oldClip );
 }
 
 //#define QPE_DONT_SHOW_TITLEBAR
 
 void QPEDecoration::maximize( QWidget *widget )
 {
-#ifdef QPE_DONT_SHOW_TITLEBAR    
+#ifdef QPE_DONT_SHOW_TITLEBAR
     if ( !widget->inherits( "QDialog" ) ) {
         widget->setGeometry( qt_maxWindowRect );
-    } else 
-        #endif
+    } else
+#endif
         {
         QWSDecoration::maximize( widget );
     }
 }
 
 #ifndef QT_NO_DIALOG
 class HackDialog : public QDialog
 {
 public:
     void acceptIt() {
         if ( isA( "QMessageBox" ) )
             qApp->postEvent( this, new QKeyEvent( QEvent::KeyPress, Key_Enter, '\n', 0, "\n" ) );
         else
             accept();
     }
 };
 #endif
 
 
 void QPEDecoration::minimize( QWidget *widget )
 {
 #ifndef QT_NO_DIALOG
     // We use the minimize button as an "accept" button.
     if ( widget->inherits( "QDialog" ) ) {
         HackDialog *d = (HackDialog *)widget;
         d->acceptIt();
-    } 
+    }
 #endif
     else if ( ((HackWidget *)widget)->needsOk() ) {
         QSignal s;
         s.connect( widget, SLOT( accept() ) );
         s.activate();
     } else {
         help( widget );
     }
 }
 
 void QPEDecoration::help( QWidget *w )
 {
     if ( helpExists ) {
         Global::execute( "helpbrowser", helpFile );
     } else if ( w && w->testWFlags(Qt::WStyle_ContextHelp) ) {
         QWhatsThis::enterWhatsThisMode();
         QWhatsThis::leaveWhatsThisMode( qApp->tr(
             "<Qt>Comprehensive help is not available for this application, "
             "however there is context-sensitive help.<p>To use context-sensitive help:<p>"
             "<ol><li>click and hold the help button."
             "<li>when the title bar shows <b>What's this...</b>, "
             "click on any control.</ol></Qt>" ) );
     }
 }
 
 void QPEDecoration::windowData( const QWidget *w, WindowDecorationInterface::WindowData &wd ) const
 {
     wd.rect = w->rect();
     if ( qpeManager->whatsThisWidget() == w )
         wd.caption = qApp->tr("What's this..." );
     else
         wd.caption = w->caption();