Presentation is now a dialog child of part so that get get only 1 entry on taskbar

To fix presentationwidget wanting to be always on top, even when it does not has the focus, we drop the staysontop on windowdeactivation and get it again on actiovation
BUGS: 103718

svn path=/trunk/kdegraphics/kpdf/; revision=405195

part.cpp

@@ -742,7 +742,7 @@ void Part::slotShowProperties()
 void Part::slotShowPresentation()
 {
     if ( !m_presentationWidget )
-      m_presentationWidget = new PresentationWidget( m_document );
+      m_presentationWidget = new PresentationWidget( widget(), m_document );
 }
 
 void Part::slotPrint()

ui/presentationwidget.cpp

@@ -20,6 +20,7 @@
 #include <klocale.h>
 #include <kiconloader.h>
 #include <kimageeffect.h>
+#include <kwin.h>
 
 // system includes
 #include <stdlib.h>
@@ -46,9 +47,8 @@ struct PresentationFrame
 };
 
 
-PresentationWidget::PresentationWidget( KPDFDocument * doc )
-    : QWidget( 0, "presentationWidget", WDestructiveClose | WStyle_NoBorder |
-    WStyle_StaysOnTop | WShowModal ), m_document( doc ), m_frameIndex( -1 )
+PresentationWidget::PresentationWidget( QWidget * parent, KPDFDocument * doc )
+    : QDialog( parent, "presentationWidget", true, WDestructiveClose | WStyle_NoBorder), m_document( doc ), m_frameIndex( -1 )
 {
     // set look and geometry
     setBackgroundMode( Qt::NoBackground );
@@ -168,6 +168,13 @@ bool PresentationWidget::canUnloadPixmap( int pageNumber )
 
 
 // <widget events>
+bool PresentationWidget::event ( QEvent * e )
+{
+    if (e -> type() == QEvent::WindowDeactivate) KWin::clearState(winId(), NET::StaysOnTop);
+    else if (e -> type() == QEvent::WindowActivate) KWin::setState(winId(), NET::StaysOnTop);
+    return QDialog::event(e);
+}
+
 void PresentationWidget::keyPressEvent( QKeyEvent * e )
 {
     if (m_width == -1) return;

ui/presentationwidget.h

@@ -10,7 +10,7 @@
 #ifndef _KPDF_PRESENTATIONWIDGET_H_
 #define _KPDF_PRESENTATIONWIDGET_H_
 
-#include <qwidget.h>
+#include <qdialog.h>
 #include <qpixmap.h>
 #include <qstringlist.h>
 #include <qvaluevector.h>
@@ -29,11 +29,11 @@ class PresentationFrame;
  *
  * This is a fullscreen widget that displays 
  */
-class PresentationWidget : public QWidget, public DocumentObserver
+class PresentationWidget : public QDialog, public DocumentObserver
 {
     Q_OBJECT
     public:
-        PresentationWidget( KPDFDocument * doc );
+        PresentationWidget( QWidget * parent, KPDFDocument * doc );
         ~PresentationWidget();
 
         // inherited from DocumentObserver
@@ -45,6 +45,7 @@ class PresentationWidget : public QWidget, public DocumentObserver
 
     protected:
         // widget events
+        bool event( QEvent * e );
         void keyPressEvent( QKeyEvent * e );
         void wheelEvent( QWheelEvent * e );
         void mousePressEvent( QMouseEvent * e );