jumpbuttonbar.cpp

/*
    This file is part of KAddressBook.
    Copyright (c) 2002 Mike Pilone <mpilone@slac.com>
 
    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.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
    As a special exception, permission is given to link this program
    with any edition of TQt, and distribute the resulting executable,
    without including the source code for TQt in the source distribution.
*/
 
#include <tqapplication.h>
#include <tqbuttongroup.h>
#include <tqevent.h>
#include <tqlayout.h>
#include <tqpushbutton.h>
#include <tqstring.h>
#include <tqstyle.h>
 
#include <tdeabc/addressbook.h>
#include <tdeabc/field.h>
#include <kdebug.h>
#include <kdialog.h>
#include <tdelocale.h>
 
#include "core.h"
 
#include "jumpbuttonbar.h"
 
class JumpButton : public TQPushButton
{
  public:
    JumpButton( const TQString &firstChar, const TQString &lastChar,
                TQWidget *parent );
 
    TQString firstChar() const { return mChar; }
 
  private:
    TQString mChar;
};
 
JumpButton::JumpButton( const TQString &firstChar, const TQString &lastChar,
                        TQWidget *parent )
  : TQPushButton( "", parent ), mChar( firstChar )
{
  setToggleButton( true );
  if ( !lastChar.isEmpty() )
    setText( TQString( "%1 - %2" ).arg( firstChar.upper() ).arg( lastChar.upper() ) );
  else
    setText( firstChar.upper() );
}
 
JumpButtonBar::JumpButtonBar( KAB::Core *core, TQWidget *parent, const char *name )
  : TQWidget( parent, name ), mCore( core )
{
  setMinimumSize( 1, 1 );
 
  TQVBoxLayout *layout = new TQVBoxLayout( this, 0, 0 );
  layout->setAlignment( TQt::AlignTop );
  layout->setAutoAdd( true );
  layout->setResizeMode( TQLayout::FreeResize );
 
  mGroupBox = new TQButtonGroup( 1, TQt::Horizontal, this );
  mGroupBox->setExclusive( true );
  mGroupBox->layout()->setSpacing( 0 );
  mGroupBox->layout()->setMargin( 0 );
  mGroupBox->setFrameStyle( TQFrame::NoFrame );
}
 
JumpButtonBar::~JumpButtonBar()
{
}
 
void JumpButtonBar::updateButtons()
{
  int currentButton = mGroupBox->selectedId();
 
  // the easiest way to remove all buttons ;)
  mButtons.setAutoDelete( true );
  mButtons.clear();
  mButtons.setAutoDelete( false );
 
  TQStringList characters;
 
  // calculate how many buttons are possible
  TQFontMetrics fm = fontMetrics();
  TQPushButton *btn = new TQPushButton( "", this );
  btn->hide();
  TQSize buttonSize = style().sizeFromContents( TQStyle::CT_PushButton, btn,
                     fm.size( ShowPrefix, "X - X") ).
                     expandedTo( TQApplication::globalStrut() );
  delete btn;
 
  int buttonHeight = buttonSize.height() + 8;
  uint possibleButtons = (height() / buttonHeight) - 1;
 
  TQString character;
  TDEABC::AddressBook *ab = mCore->addressBook();
  TDEABC::AddressBook::Iterator it;
  for ( it = ab->begin(); it != ab->end(); ++it ) {
    TDEABC::Field *field = 0;
    field = mCore->currentSortField();
    if ( field ) {
      setEnabled( true );
      if ( !field->value( *it ).isEmpty() )
        character = field->value( *it )[ 0 ].lower();
    } else {
      setEnabled( false );
      return;
    }
 
    if ( !character.isEmpty() && !characters.contains( character ) )
      characters.append( character );
  }
 
  sortListLocaleAware( characters );
 
  if ( characters.count() <= possibleButtons ) {
    // at first the easy case: all buttons fits in window
    for ( uint i = 0; i < characters.count(); ++i ) {
      JumpButton *button = new JumpButton( characters[ i ], TQString(),
                                           mGroupBox );
      connect( button, TQ_SIGNAL( clicked() ), this, TQ_SLOT( letterClicked() ) );
      mButtons.append( button );
      button->show();
    }
  } else {
    if ( possibleButtons == 0 ) // to avoid crashes on startup
      return;
    int offset = characters.count() / possibleButtons;
    int odd = characters.count() % possibleButtons;
    if ( odd )
      offset++;
 
    int current = 0;
    for ( uint i = 0; i < possibleButtons; ++i ) {
      if ( characters.count() - current == 0 )
        continue;
      if ( characters.count() - current <= possibleButtons - i ) {
        JumpButton *button = new JumpButton( characters[ current ],
                                             TQString(), mGroupBox );
        connect( button, TQ_SIGNAL( clicked() ), this, TQ_SLOT( letterClicked() ) );
        mButtons.append( button );
        button->show();
        current++;
      } else {
        int pos = ( current + offset >= (int)characters.count() ?
                    characters.count() - 1 : current + offset - 1 );
        TQString range;
        for ( int j = current; j < pos + 1; ++j )
          range.append( characters[ j ] );
        JumpButton *button = new JumpButton( characters[ current ],
                                             characters[ pos ], mGroupBox );
        connect( button, TQ_SIGNAL( clicked() ), this, TQ_SLOT( letterClicked() ) );
        mButtons.append( button );
        button->show();
        current = ( i + 1 ) * offset;
      }
    }
  }
 
  if ( currentButton != -1 )
    mGroupBox->setButton( currentButton );
  else
    mGroupBox->setButton( 0 );
 
  int maxWidth = 0;
  TQPushButton *button;
  for ( button = mButtons.first(); button; button = mButtons.next() )
    maxWidth = TQMAX( maxWidth, button->sizeHint().width() );
 
  setFixedWidth( maxWidth );
}
 
void JumpButtonBar::letterClicked()
{
  JumpButton *button = (JumpButton*)sender();
  TQString character = button->firstChar();
 
  emit jumpToLetter( character );
}
 
void JumpButtonBar::resizeEvent( TQResizeEvent* )
{
  updateButtons();
}
 
class SortContainer
{
  public:
    SortContainer() {}
    SortContainer( const TQString &string )
      : mString( string )
    {
    }
 
    bool operator< ( const SortContainer &cnt )
    {
      return ( TQString::localeAwareCompare( mString, cnt.mString ) < 0 );
    }
 
    TQString data() const
    {
      return mString;
    }
 
  private:
    TQString mString;
};
 
void JumpButtonBar::sortListLocaleAware( TQStringList &list )
{
  TQValueList<SortContainer> sortList;
 
  TQStringList::ConstIterator it;
  for ( it = list.begin(); it != list.end(); ++it )
    sortList.append( SortContainer( *it ) );
 
  qHeapSort( sortList );
  list.clear();
 
  TQValueList<SortContainer>::ConstIterator sortIt;
  for ( sortIt = sortList.begin(); sortIt != sortList.end(); ++sortIt )
    list.append( (*sortIt).data() );
}
 
#include "jumpbuttonbar.moc"