/*
**************************************************************************
                                 description
                             --------------------
    copyright            : (C) 2002 by Andreas Zehender
    email                : zehender@kde.org
**************************************************************************

**************************************************************************
*                                                                        *
*  This program is free software; you can redistribute it and/or modify  *
*  it under the terms of the GNU General Public License as published by  *
*  the Free Software Foundation; either version 2 of the License, or     *
*  (at your option) any later version.                                   *
*                                                                        *
**************************************************************************/


#include "pmlatheedit.h"
#include "pmlathe.h"
#include "pmvectoredit.h"
#include "pmvectorlistedit.h"
#include "pmpart.h"

#include <tqlayout.h>
#include <tqlabel.h>
#include <tqtooltip.h>
#include <tqcombobox.h>
#include <tqcheckbox.h>
#include <tqpushbutton.h>
#include <tdelocale.h>
#include <kdialog.h>
#include <kiconloader.h>
#include <tdemessagebox.h>

PMLatheEdit::PMLatheEdit( TQWidget* parent, const char* name )
      : Base( parent, name )
{
   m_pDisplayedObject = 0;
}

void PMLatheEdit::createTopWidgets( )
{
   Base::createTopWidgets( );

   TQHBoxLayout* hl = new TQHBoxLayout( topLayout( ) );
   hl->addWidget( new TQLabel( i18n( "Spline type:" ), this ) );
   m_pSplineType = new TQComboBox( false, this );
   m_pSplineType->insertItem( i18n( "Linear Spline" ) );
   m_pSplineType->insertItem( i18n( "Quadratic Spline" ) );
   m_pSplineType->insertItem( i18n( "Cubic Spline" ) );
   m_pSplineType->insertItem( i18n( "Bezier Spline" ) );
   hl->addWidget( m_pSplineType );
   hl->addStretch( 1 );

   connect( m_pSplineType, TQT_SIGNAL( activated( int ) ),
            TQT_SLOT( slotTypeChanged( int ) ) );
}

void PMLatheEdit::createBottomWidgets( )
{
   topLayout( )->addWidget( new TQLabel( i18n( "Spline points:" ), this ) );
   
   m_pPoints = new PMVectorListEdit( "u", "v", this );
   connect( m_pPoints, TQT_SIGNAL( dataChanged( ) ), TQT_SIGNAL( dataChanged( ) ) );
   connect( m_pPoints, TQT_SIGNAL( selectionChanged( ) ),
            TQT_SLOT( slotSelectionChanged( ) ) );
   TQHBoxLayout* hl = new TQHBoxLayout( topLayout( ) );
   hl->addWidget( m_pPoints, 2 );

   m_pAddAbove = new TQPushButton( this );
   m_pAddAbove->setPixmap( SmallIcon( "pmaddpointabove" ) );
   m_pAddBelow = new TQPushButton( this );
   m_pAddBelow->setPixmap( SmallIcon( "pmaddpoint" ) );
   m_pRemove = new TQPushButton( this );
   m_pRemove->setPixmap( SmallIcon( "pmremovepoint" ) );
   connect( m_pAddAbove, TQT_SIGNAL( clicked( ) ), TQT_SLOT( slotAddPointAbove( ) ) );
   connect( m_pAddBelow, TQT_SIGNAL( clicked( ) ), TQT_SLOT( slotAddPointBelow( ) ) );
   connect( m_pRemove, TQT_SIGNAL( clicked( ) ), TQT_SLOT( slotRemovePoint( ) ) );

   TQVBoxLayout* bl = new TQVBoxLayout( hl );
   bl->addWidget( m_pAddAbove );
   bl->addWidget( m_pAddBelow );
   bl->addWidget( m_pRemove );
   bl->addStretch( 1 );

   m_pSturm = new TQCheckBox( i18n( "Sturm" ), this );
   topLayout( )->addWidget( m_pSturm );
   connect( m_pSturm, TQT_SIGNAL( clicked( ) ), TQT_SIGNAL( dataChanged( ) ) );

   Base::createBottomWidgets( );
}

void PMLatheEdit::displayObject( PMObject* o )
{
   if( o->isA( "Lathe" ) )
   {
      bool readOnly = o->isReadOnly( );
      m_pDisplayedObject = ( PMLathe* ) o;

      switch( m_pDisplayedObject->splineType( ) )
      {
         case PMLathe::LinearSpline:
            m_pSplineType->setCurrentItem( 0 );
            break;
         case PMLathe::QuadraticSpline:
            m_pSplineType->setCurrentItem( 1 );
            break;
         case PMLathe::CubicSpline:
            m_pSplineType->setCurrentItem( 2 );
            break;
         case PMLathe::BezierSpline:
            m_pSplineType->setCurrentItem( 3 );
            break;
      }
      m_pSplineType->setEnabled( !readOnly );
      m_pSturm->setChecked( m_pDisplayedObject->sturm( ) );
      m_pSturm->setEnabled( !readOnly );
      m_pPoints->setReadOnly( readOnly );
      m_pPoints->setVectors( m_pDisplayedObject->points( ), true );
      updateControlPointSelection( );
      updatePointButtons( );

      Base::displayObject( o );
   }
   else
      kdError( PMArea ) << "PMLatheEdit: Can't display object\n";
}

void PMLatheEdit::updateControlPointSelection( )
{
   PMControlPointList cp = part( )->activeControlPoints( );
   PMControlPointListIterator it( cp );
   int i;
   int np = cp.count( ) / 2;

   if( np == m_pPoints->size( ) )
   {
      m_pPoints->blockSelectionUpdates( true );
      bool sb = m_pPoints->signalsBlocked( );
      m_pPoints->blockSignals( true );
      
      m_pPoints->clearSelection( );
      for( i = 0; i < np; i++, ++it )
         if( ( *it )->selected( ) )
            m_pPoints->select( i );
      for( i = 0; i < np; i++, ++it )
         if( ( *it )->selected( ) )
            m_pPoints->select( i );
      
      m_pPoints->blockSignals( sb );
      m_pPoints->blockSelectionUpdates( false );
   }
}

void PMLatheEdit::saveContents( )
{
   if( m_pDisplayedObject )
   {
      m_pDisplayedObject->setPoints( m_pPoints->vectors( ) );

      switch( m_pSplineType->currentItem( ) )
      {
         case 0:
            m_pDisplayedObject->setSplineType( PMLathe::LinearSpline );
            break;
         case 1:
            m_pDisplayedObject->setSplineType( PMLathe::QuadraticSpline );
            break;
         case 2:
            m_pDisplayedObject->setSplineType( PMLathe::CubicSpline );
            break;
         case 3:
            m_pDisplayedObject->setSplineType( PMLathe::BezierSpline );
            break;
      }
      m_pDisplayedObject->setSturm( m_pSturm->isChecked( ) );
      Base::saveContents( );
   }
}

bool PMLatheEdit::isDataValid( )
{
   if( !m_pPoints->isDataValid( ) )
         return false;
   
   int np = m_pPoints->size( );
   switch( m_pSplineType->currentItem( ) )
   {
      case 0:
         if( np < 2 )
         {
            KMessageBox::error( this, i18n( "Linear splines need at least 2 points." ),
                                i18n( "Error" ) );
            return false;
         }
         break;
      case 1:
         if( np < 3 )
         {
            KMessageBox::error( this, i18n( "Quadratic splines need at least 3 points." ),
                                i18n( "Error" ) );
            return false;
         }
         break;
      case 2:
         if( np < 4 )
         {
            KMessageBox::error( this, i18n( "Cubic splines need at least 4 points." ),
                                i18n( "Error" ) );
            return false;
         }
         break;
      case 3:
         if( ( np < 4 ) || ( ( np % 4 ) != 0 ) )
         {
            KMessageBox::error( this, i18n( "Bezier splines need 4 points for each segment." ),
                                i18n( "Error" ) );
            return false;
         }
         break;
   }
   
   return Base::isDataValid( );
}

void PMLatheEdit::slotTypeChanged( int )
{
   emit dataChanged( );
}

void PMLatheEdit::slotAddPointAbove( )
{
   int index = m_pPoints->currentRow( );
   if( index >= 0 )
   {
      TQValueList<PMVector> points = m_pPoints->vectors( );
      TQValueListIterator<PMVector> it = points.at( index );

      if( it != points.end( ) )
      {
         TQValueListIterator<PMVector> it2 = it;
         it2--;
         PMVector v;
         if( it2 == points.end( ) )
            v = *it;
         else
            v = ( *it + *it2 ) / 2;
         
         points.insert( it, v );
         m_pPoints->setVectors( points, true );
         updatePointButtons( );
         emit dataChanged( );
         emit sizeChanged( );
      }
   }
}

void PMLatheEdit::slotAddPointBelow( )
{
   int index = m_pPoints->currentRow( );
   if( index >= 0 )
   {
      TQValueList<PMVector> points = m_pPoints->vectors( );
      TQValueListIterator<PMVector> it = points.at( index );

      if( it != points.end( ) )
      {
         TQValueListIterator<PMVector> it2 = it;
         it2++;
         PMVector v;
         if( it2 == points.end( ) )
            v = *it;
         else
            v = ( *it + *it2 ) / 2;
         
         points.insert( it2, v );
         m_pPoints->setVectors( points, true );
         m_pPoints->setCurrentCell( index + 1, m_pPoints->currentColumn( ) );
         updatePointButtons( );
         emit dataChanged( );
         emit sizeChanged( );
      }
   }
}

void PMLatheEdit::slotRemovePoint( )
{
   int row = m_pPoints->currentRow( );

   if( row >= 0 )
   {
      TQValueList<PMVector> points = m_pPoints->vectors( );
      TQValueListIterator<PMVector> it = points.at( row );
      
      if( it != points.end( ) && points.size( ) > 1 )
      {
         points.remove( it );
         m_pPoints->setVectors( points, true );
         updatePointButtons( );
         emit dataChanged( );
         emit sizeChanged( );
      }
   }
}

void PMLatheEdit::slotSelectionChanged( )
{
   PMControlPointList cp = part( )->activeControlPoints( );
   PMControlPointListIterator it( cp );
   int np = cp.count( ) / 2;
   int i;
   
   if( np == m_pPoints->size( ) )
   {
      for( i = 0; i < np; i++, ++it )
         ( *it )->setSelected( m_pPoints->isSelected( i ) );
      for( i = 0; i < np; i++, ++it )
         ( *it )->setSelected( m_pPoints->isSelected( i ) );
      emit controlPointSelectionChanged( );
   }
   updatePointButtons( );
}

void PMLatheEdit::updatePointButtons( )
{
   int row = m_pPoints->currentRow( );
   m_pAddAbove->setEnabled( row >= 0 );
   m_pAddBelow->setEnabled( row >= 0 );
   m_pRemove->setEnabled( row >= 0 && m_pPoints->size( ) > 2 );
}

#include "pmlatheedit.moc"
