From aa217adc411937d9a850fd95ef5d37d3808ece56 Mon Sep 17 00:00:00 2001
From: stv <stv@opencascade.com>
Date: Tue, 7 Nov 2006 13:07:21 +0000
Subject: [PATCH] Perfomance optimization.

---
 src/Qtx/QtxTable.cxx | 46 +++++++++++++++++++++++++++++++++-----------
 src/Qtx/QtxTable.h   |  2 ++
 2 files changed, 37 insertions(+), 11 deletions(-)

diff --git a/src/Qtx/QtxTable.cxx b/src/Qtx/QtxTable.cxx
index 768013761..63553cf80 100644
--- a/src/Qtx/QtxTable.cxx
+++ b/src/Qtx/QtxTable.cxx
@@ -97,12 +97,16 @@ private:
   ColorMap      myFgColor;
   ColorMap      myBgColor;
   int           myPressed;
+  int           mySection;
+
+  friend class QtxTable::StyleItem;
 };
 
 QtxTable::Header::Header( int n, QtxTable* table, const char* name )
 : QHeader( n, table, name ),
 myTable( table ),
-myPressed( -1 )
+myPressed( -1 ),
+mySection( -1 )
 {
 }
 
@@ -228,7 +232,8 @@ void QtxTable::Header::setHorizontalSpan( const int section, const int sp )
     return;
 
   myHSpan.insert( section, sp );
-  repaint( indexRect( mapToIndex( section ) ) );
+  if ( isUpdatesEnabled() )
+    repaint( indexRect( mapToIndex( section ) ) );
 }
 
 int QtxTable::Header::verticalSpan( const int section ) const
@@ -242,7 +247,8 @@ void QtxTable::Header::setVerticalSpan( const int section, const int sp )
     return;
 
   myVSpan.insert( section, sp );
-  repaint( indexRect( mapToIndex( section ) ) );
+  if ( isUpdatesEnabled() )
+    repaint( indexRect( mapToIndex( section ) ) );
 }
 
 QColor QtxTable::Header::foregroundColor( const int section ) const
@@ -261,7 +267,8 @@ void QtxTable::Header::setForegroundColor( const int section, const QColor& c )
     return;
 
   myFgColor.insert( section, c );
-  repaint( indexRect( mapToIndex( section ) ) );
+  if ( isUpdatesEnabled() )
+    repaint( indexRect( mapToIndex( section ) ) );
 }
 
 void QtxTable::Header::setBackgroundColor( const int section, const QColor& c )
@@ -270,7 +277,8 @@ void QtxTable::Header::setBackgroundColor( const int section, const QColor& c )
     return;
 
   myBgColor.insert( section, c );
-  repaint( indexRect( mapToIndex( section ) ) );
+  if ( isUpdatesEnabled() )
+    repaint( indexRect( mapToIndex( section ) ) );
 }
 
 void QtxTable::Header::swapSections( const int oldIdx, const int newIdx )
@@ -365,7 +373,14 @@ void QtxTable::Header::paintSection( QPainter* p, int index, const QRect& fr )
   QRect r = fr;
   if ( index < count() )
     r = indexRect( index, &idx );
+
+  // Currently painted section number. This number will be used in the drawing style.
+  // Because QHeader::paintSection() implementation doesn't send section id through style options :(
+  mySection = mapToSection( index );
+
   QHeader::paintSection( p, idx, r );
+
+  mySection = -1;
 }
 
 bool QtxTable::Header::filterEvent( QMouseEvent* e ) const
@@ -571,12 +586,7 @@ bool QtxTable::StyleItem::drawPrimitive( QStyle::PrimitiveElement pe, QPainter*
     return false;
 
   Header* h = (Header*)hdr;
-  int section = -1;
-  for ( int i = 0; i < (int)h->count() && section < 0; i++ )
-  {
-    if ( r.contains( h->indexRect( i ) ) )
-      section = h->mapToSection( i );
-  }
+  int section = h->mySection;
 
   if ( section < 0 )
     return false;
@@ -1058,6 +1068,17 @@ void QtxTable::removeColumns( const QMemArray<int>& cols )
   }
 }
 
+void QtxTable::setUpdatesEnabled( bool enable )
+{
+  QTable::setUpdatesEnabled( enable );
+
+  if ( enable )
+  {
+    updateHeaderGeometries( Horizontal );
+    updateHeaderGeometries( Vertical );
+  }
+}
+
 QHeader* QtxTable::header( const Orientation o, const int idx ) const
 {
   HeaderVector* vec = headerVector( o );
@@ -1759,6 +1780,9 @@ void QtxTable::updateGeometries()
 
 void QtxTable::updateHeaderGeometries( const Orientation o )
 {
+  if ( !isUpdatesEnabled() )
+    return;
+
   updateHeaderSizes( o );
   updateHeaderSpace( o );
   updateGeometries();
diff --git a/src/Qtx/QtxTable.h b/src/Qtx/QtxTable.h
index 355d6ab4d..eb7fee0ec 100644
--- a/src/Qtx/QtxTable.h
+++ b/src/Qtx/QtxTable.h
@@ -116,6 +116,8 @@ public slots:
   virtual void     removeColumn( int );
   virtual void     removeColumns( const QMemArray<int>& );
 
+  virtual void     setUpdatesEnabled( bool enable );
+
 private slots:
   void             onScrollBarMoved( int );
   void             onHeaderSizeChange( int, int, int );
-- 
2.39.2