Bug 51402

By submitting a patch ;-) It indeed would be nice to have them back. 
 

I noticed that the actions are still in the khelpcenterui.rc file, and looking at the KHTML 
sources, it seems that KHTMLZoomFactorAction, which causes the font size buttons 
you want, is not part of the public API. I *think* they were lost when KHelpCenter was 
de-KPart-ized, since that also made it impossible for khtml to embed it's internal actions 
(like the zoom actions) into KHelpCenter. 
 
Either we add the KPart support back, or we copy those zoom factor actions into 
KHelpCenter. Cornelius, what do you think? 

Subject: kdebase/khelpcenter

CVS commit by raabe: 

- The font zoom buttons are back
CCMAIL:51402-done@bugs.kde.org


  M +20 -0     mainwindow.cpp   1.32
  M +4 -0      mainwindow.h   1.15
  M +12 -0     view.cpp   1.12
  M +5 -0      view.h   1.10


--- kdebase/khelpcenter/mainwindow.cpp  #1.31:1.32
@@ -184,4 +184,7 @@ void MainWindow::setupActions()
     */
     History::self().setupActions( actionCollection() );
+
+    new KAction( i18n( "Increase Font Sizes" ), "viewmag+", KShortcut(), this, SLOT( slotIncFontSizes() ), actionCollection(), "incFontSizes" );
+    new KAction( i18n( "Decrease Font Sizes" ), "viewmag-", KShortcut(), this, SLOT( slotDecFontSizes() ), actionCollection(), "decFontSizes" );
 }
 
@@ -336,4 +339,21 @@ void MainWindow::showSearchStderr()
 }
 
+void MainWindow::slotIncFontSizes()
+{
+  mDoc->slotIncFontSizes();
+  updateZoomActions();
+}
+
+void MainWindow::slotDecFontSizes()
+{
+  mDoc->slotDecFontSizes();
+  updateZoomActions();
+}
+
+void MainWindow::updateZoomActions()
+{
+  actionCollection()->action( "incFontSizes" )->setEnabled( mDoc->zoomFactor() + mDoc->zoomStepping() <= 300 );
+  actionCollection()->action( "decFontSizes" )->setEnabled( mDoc->zoomFactor() - mDoc->zoomStepping() >= 20 );
+}
 
 // vim:ts=2:sw=2:et

--- kdebase/khelpcenter/mainwindow.h  #1.14:1.15
@@ -61,6 +61,10 @@ class MainWindow : public KMainWindow, p
     void documentCompleted();
     void openOwnManual();
+    void slotIncFontSizes();
+    void slotDecFontSizes();
 
   private:
+    void updateZoomActions();
+
     View *mDoc;
     Navigator *mNavigator;

--- kdebase/khelpcenter/view.cpp  #1.11:1.12
@@ -15,4 +15,6 @@ View::View( QWidget *parentWidget, const
     : KHTMLPart( parentWidget, widgetName, parent, name, prof ), mState( Docu )
 {
+    m_zoomStepping = 10;
+
     connect( this, SIGNAL( setWindowCaption( const QString & ) ),
              this, SLOT( setTitle( const QString & ) ) );
@@ -178,4 +180,14 @@ void View::lastSearch()
   write( mSearchResult );
   end();
+}
+
+void View::slotIncFontSizes()
+{
+  setZoomFactor( zoomFactor() + m_zoomStepping );
+}
+
+void View::slotDecFontSizes()
+{
+  setZoomFactor( zoomFactor() - m_zoomStepping );
 }
 

--- kdebase/khelpcenter/view.h  #1.9:1.10
@@ -32,6 +32,10 @@ class View : public KHTMLPart
     void endSearchResult();
 
+    int zoomStepping() const { return m_zoomStepping; }
+
   public slots:
     void lastSearch();
+    void slotIncFontSizes();
+    void slotDecFontSizes();
 
   signals:
@@ -48,4 +52,5 @@ class View : public KHTMLPart
 
     QString mSearchResult;
+    int m_zoomStepping;
 };
 

*** Bug 62318 has been marked as a duplicate of this bug. ***