Forward-port the following Qt3 GIT commits to TQt4:

3653f049bf83636d00237e61781e68ae7c3b499a	[ENHANCEMENT] Add skeleton of setVisible()/isVisible() support to QIconView
4dd6a7ae2cf8d7fc3df7c9743129cec736c0d591	[ENHANCEMENT] Add new PE_HeaderSectionMenu primitive element

tqtinterface/qt4/src/iconview/tqiconview.cpp

@@ -995,6 +995,7 @@ void TQIconViewItem::init( TQIconViewItem *after
     allow_rename = FALSE;
     allow_drag = TRUE;
     allow_drop = TRUE;
+    visible = TRUE;
     selected = FALSE;
     selectable = TRUE;
 #ifndef TQT_NO_TEXTEDIT
@@ -1050,6 +1051,32 @@ int TQIconViewItem::rtti() const
     return RTTI;
 }
 
+/*!
+    If \a b is TRUE, the item is made visible; otherwise it is hidden.
+*/
+
+void TQIconViewItem::setVisible( bool b )
+{
+    if ( b == (bool)visible )
+	return;
+    TQIconView *iv = iconView();
+    if ( !iv )
+	return;
+    visible = b;
+    if ( iv )
+	iv->updateContents();
+}
+
+/*!
+    Returns TRUE if the item is visible; otherwise returns FALSE.
+
+    \sa setVisible()
+*/
+
+bool TQIconViewItem::isVisible() const
+{
+    return (bool)visible;
+}
 
 /*!
     Sets \a text as the text of the icon view item. This function
@@ -3852,11 +3879,19 @@ void TQIconView::selectAll( bool select )
     viewport()->setUpdatesEnabled( FALSE );
     TQRect rr;
     for ( ; item; item = item->next ) {
+        if (item->isVisible()) {
 	    if ( select != item->isSelected() ) {
 	        item->setSelected( select, TRUE );
 	        rr = rr.unite( item->rect() );
 	        changed = TRUE;
 	    }
+	    else {
+	        if ( FALSE != item->isSelected() ) {
+	            item->setSelected( FALSE, TRUE );
+	            changed = TRUE;
+	        }
+	    }
+	}
     }
     viewport()->setUpdatesEnabled( ue );
     // we call updateContents not repaintContents because of possible previous updateContents
@@ -6148,6 +6183,7 @@ void TQIconView::updateItemContainer( TQIconViewItem *item )
 	return;
     }
 
+    if (item->isVisible()) {
         c->items.append( item );
         item->d->container1 = c;
 
@@ -6160,6 +6196,7 @@ void TQIconView::updateItemContainer( TQIconViewItem *item )
 	    c->items.append( item );
 	    item->d->container2 = c;
         }
+    }
     if ( contentsWidth() < irect.right() || contentsHeight() < irect.bottom() )
 	resizeContents( TQMAX( contentsWidth(), irect.right() ), TQMAX( contentsHeight(), irect.bottom() ) );
 }
@@ -6213,6 +6250,7 @@ void TQIconView::rebuildContainers()
     appendItemContainer();
     c = d->lastContainer;
     while ( item ) {
+        if (item->isVisible()) {
 	    if ( c->rect.tqcontains( item->rect() ) ) {
 	        item->d->container1 = c;
 	        item->d->container2 = 0;
@@ -6251,6 +6289,7 @@ void TQIconView::rebuildContainers()
 	    }
 	}
     }
+}
 
 /*!
   \internal

tqtinterface/qt4/src/iconview/tqiconview.h

@@ -170,6 +170,9 @@ public:
     bool isSelected() const;
     bool isSelectable() const;
 
+    void setVisible( bool b );
+    bool isVisible() const;
+
     virtual void tqrepaint();
 
     virtual bool move( int x, int y );
@@ -250,6 +253,7 @@ private:
     uint allow_rename : 1;
     uint allow_drag : 1;
     uint allow_drop : 1;
+    uint visible : 1;
     uint selected : 1;
     uint selectable : 1;
     uint dirty : 1;

tqtinterface/qt4/src/kernel/tqstyle.h

@@ -744,6 +744,8 @@ public:
 	PE_PanelGroupBox,
 	PE_RubberBand,
 
+	PE_HeaderSectionMenu,
+
 	// do not add any values below/greater this
 	PE_CustomBase =			0xf000000
     };

tqtinterface/qt4/src/styles/tqcommonstyle.cpp

@@ -283,6 +283,7 @@ void TQCommonStyle::tqdrawPrimitive( TQ_PrimitiveElement pe,
     case TQStyle::PE_ButtonTool:
     case TQStyle::PE_ButtonDropDown:
     case TQStyle::PE_HeaderSection:
+    case TQStyle::PE_HeaderSectionMenu:
 	qDrawShadePanel(p, r, cg, flags & (Style_Sunken | Style_Down | Style_On) , 1,
 			&cg.brush(TQColorGroup::Button));
 	break;