Give a tooltip in the page view for every kind of lnk we support.

Also improve a bit the one in the presentation mode, and give a message when the link is a "go to the page x" link.
Implements KPDF wish #131361.

svn path=/trunk/playground/graphics/okular/; revision=588899

core/link.cpp

@@ -27,7 +27,7 @@ QString Link::linkTip() const
 // Link Tips
 QString LinkGoto::linkTip() const
 {
-    return m_extFileName.isEmpty() ? "" : i18n("Open external file");
+    return m_extFileName.isEmpty() ? ( m_vp.pageNumber != -1 ? i18n( "Go to page %1", m_vp.pageNumber ) : "" ) : i18n("Open external file");
 }
 
 QString LinkExecute::linkTip() const

ui/pageview.cpp

@@ -28,6 +28,7 @@
 #include <qdatetime.h>
 #include <qpushbutton.h>
 #include <qset.h>
+#include <qtooltip.h>
 #include <qapplication.h>
 #include <qclipboard.h>
 #include <QX11Info>
@@ -602,6 +603,40 @@ bool PageView::canUnloadPixmap( int pageNumber )
 //END DocumentObserver inherited methods
 
 //BEGIN widget events
+bool PageView::event( QEvent* e )
+{
+    if ( e->type() == QEvent::ToolTip )
+    {
+        QHelpEvent * he = (QHelpEvent*)e;
+        PageViewItem * pageItem = pickItemOnPoint( he->x() + contentsX(), he->y() + contentsY() );
+        const Okular::ObjectRect * rect = 0;
+        const Okular::Link * link = 0;
+        if ( pageItem )
+        {
+            double nX = (double)( he->x() + contentsX() - pageItem->geometry().left() ) / (double)pageItem->width(),
+                   nY = (double)( he->y() + contentsY() - pageItem->geometry().top() ) / (double)pageItem->height();
+            rect = pageItem->page()->getObjectRect( Okular::ObjectRect::Link, nX, nY, pageItem->width(), pageItem->height() );
+            if ( rect )
+                link = static_cast< const Okular::Link * >( rect->pointer() );
+        }
+
+        if ( link )
+        {
+            // TODO make the rect for the object work
+            QRect r = rect->boundingRect( pageItem->width(), pageItem->height() );
+            r.translate( pageItem->geometry().left(), pageItem->geometry().top() );
+            QString tip = link->linkTip();
+            if ( !tip.isEmpty() )
+                QToolTip::showText( he->globalPos(), tip, this, r );
+        }
+        e->accept();
+        return true;
+    }
+    else
+        // do not stop the event
+        return Q3ScrollView::event( e );
+}
+
 void PageView::viewportPaintEvent( QPaintEvent * pe )
 {
 

ui/pageview.h

@@ -93,6 +93,8 @@ class PageView : public Q3ScrollView, public Okular::DocumentObserver
         void rightClick( const Okular::Page *, const QPoint & );
 
     protected:
+        bool event( QEvent* );
+
         // viewport events
         void viewportPaintEvent( QPaintEvent * pe );
         void viewportResizeEvent( QResizeEvent* );

ui/presentationwidget.cpp

@@ -191,13 +191,14 @@ bool PresentationWidget::event( QEvent * e )
     {
         QHelpEvent * he = (QHelpEvent*)e;
 
-        const Okular::Link * link = getLink( he->x(), he->y(), 0 );
+        QRect r;
+        const Okular::Link * link = getLink( he->x(), he->y(), &r );
 
         if ( link )
         {
             QString tip = link->linkTip();
             if ( !tip.isEmpty() )
-                QToolTip::showText( he->globalPos(), tip, this );
+                QToolTip::showText( he->globalPos(), tip, this, r );
         }
         e->accept();
         return true;