/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   copyright (C) 2002-2006                                               *
 *   Umbrello UML Modeller Authors <uml-devel@uml.sf.net>                  *
 ***************************************************************************/

#include "activitypage.h"
#include "../statewidget.h"
#include "../listpopupmenu.h"
#include "../uml.h"

#include <kinputdialog.h>
#include <tdelocale.h>
#include <kbuttonbox.h>
#include <kdebug.h>
#include <tqlayout.h>
#include <tqstringlist.h>

ActivityPage::ActivityPage( TQWidget * pParent, StateWidget * pWidget ) : TQWidget( pParent ) {
    m_pStateWidget = pWidget;
    m_pMenu = 0;
    setupPage();
}

ActivityPage::~ActivityPage() {}

void ActivityPage::setupPage() {
    int margin = fontMetrics().height();
    
    TQVBoxLayout * mainLayout = new TQVBoxLayout( this );
    mainLayout -> setSpacing(10);

    m_pActivityGB = new TQGroupBox(i18n("Activities"), this );

    // vertical box layout for the activity lists, arrow buttons and the button box
    TQVBoxLayout* listVBoxLayout = new TQVBoxLayout( m_pActivityGB );
    listVBoxLayout -> setMargin(margin);
    listVBoxLayout -> setSpacing ( 10 );

    //horizontal box contains the list box and the move up/down buttons
    TQHBoxLayout* listHBoxLayout = new TQHBoxLayout( listVBoxLayout );
    
    m_pActivityLB = new TQListBox(m_pActivityGB );
   
    listHBoxLayout -> addWidget(m_pActivityLB);

    TQVBoxLayout * buttonLayout = new TQVBoxLayout( listHBoxLayout );

    m_pTopArrowB = new KArrowButton( m_pActivityGB );
    m_pTopArrowB -> setEnabled( false );
    buttonLayout -> addWidget( m_pTopArrowB );

    m_pUpArrowB = new KArrowButton( m_pActivityGB );
    m_pUpArrowB -> setEnabled( false );
    buttonLayout -> addWidget( m_pUpArrowB );

    m_pDownArrowB = new KArrowButton( m_pActivityGB, Qt::DownArrow );
    m_pDownArrowB -> setEnabled( false );
    buttonLayout -> addWidget( m_pDownArrowB );

    m_pBottomArrowB = new KArrowButton( m_pActivityGB, Qt::DownArrow );
    m_pBottomArrowB -> setEnabled( false );
    buttonLayout -> addWidget( m_pBottomArrowB );

   
    KButtonBox* buttonBox = new KButtonBox(m_pActivityGB);
    buttonBox->addButton( i18n("New Activity..."), TQT_TQOBJECT(this), TQT_SLOT(slotNewActivity()) );
    m_pDeleteActivityButton = buttonBox->addButton( i18n("Delete"),
                              TQT_TQOBJECT(this), TQT_SLOT(slotDelete()) );
    m_pRenameButton = buttonBox->addButton( i18n("Rename"), TQT_TQOBJECT(this), TQT_SLOT(slotRename()) );
    listVBoxLayout->addWidget(buttonBox);

    mainLayout -> addWidget( m_pActivityGB );

    //now fill activity list box
    TQStringList list = m_pStateWidget -> getActivityList();
    TQStringList::Iterator end(list.end());

    for( TQStringList::Iterator it(list.begin()); it != end; ++it ) {
        m_pActivityLB -> insertItem( *it );
    }

    //now setup the signals
    connect(m_pActivityLB, TQT_SIGNAL(clicked(TQListBoxItem *)), this, TQT_SLOT(slotClicked(TQListBoxItem *)));
    connect(m_pActivityLB, TQT_SIGNAL(rightButtonPressed(TQListBoxItem *, const TQPoint &)),
            this, TQT_SLOT(slotRightButtonPressed(TQListBoxItem *, const TQPoint &)));

    connect(m_pActivityLB, TQT_SIGNAL(rightButtonClicked(TQListBoxItem *, const TQPoint &)),
            this, TQT_SLOT(slotRightButtonClicked(TQListBoxItem *, const TQPoint &)));

    connect( m_pTopArrowB, TQT_SIGNAL( clicked() ), this, TQT_SLOT( slotTopClicked() ) );
    connect( m_pUpArrowB, TQT_SIGNAL( clicked() ), this, TQT_SLOT( slotUpClicked() ) );
    connect( m_pDownArrowB, TQT_SIGNAL( clicked() ), this, TQT_SLOT( slotDownClicked() ) );
    connect( m_pBottomArrowB, TQT_SIGNAL( clicked() ), this, TQT_SLOT( slotBottomClicked() ) );
     
    connect( m_pActivityLB, TQT_SIGNAL( doubleClicked( TQListBoxItem* ) ), this, TQT_SLOT( slotDoubleClicked( TQListBoxItem* ) ) );

    enableWidgets(false);
}

void ActivityPage::updateActivities() {
    TQStringList list;
    int count = m_pActivityLB -> count();
    for( int i = 0; i < count; i++ ) {
        list.append( m_pActivityLB -> text( i ) );
    }
    m_pStateWidget -> setActivities( list );
}

void ActivityPage::slotMenuSelection( int sel ) {
    switch( sel ) {
    case ListPopupMenu::mt_New_Activity:
        slotNewActivity();
        break;

    case ListPopupMenu::mt_Delete:
        slotDelete();
        break;

    case ListPopupMenu::mt_Rename:
        slotRename();
        break;
    }
}

void ActivityPage::slotNewActivity() {
    bool ok = false;
    TQString name = m_pActivityLB->currentText();
    name = KInputDialog::getText( i18n("New Activity"), i18n("Enter the name of the new activity:"),
                                  i18n("new activity"), &ok, UMLApp::app() );
    if( ok && name.length() > 0 ) {
        m_pActivityLB->insertItem( name );
        m_pStateWidget->addActivity( name );
    }
}

void ActivityPage::slotDelete() {
    TQString name = m_pActivityLB->currentText();
    m_pStateWidget->removeActivity(name);
    m_pActivityLB->removeItem( m_pActivityLB->currentItem() );
    slotClicked(0);
}

void ActivityPage::slotRename() {
    bool ok = false;
    TQString name = m_pActivityLB -> currentText();
    TQString oldName = name;
    name = KInputDialog::getText( i18n("Rename Activity"), i18n("Enter the new name of the activity:"), name, &ok, UMLApp::app() );
    if( ok && name.length() > 0 ) {
        m_pActivityLB -> changeItem( name, m_pActivityLB -> currentItem());
        m_pStateWidget -> renameActivity( oldName, name );
    }
}

void ActivityPage::slotRightButtonClicked(TQListBoxItem * /*item*/, const TQPoint &/* p*/) {
    if(m_pMenu) {
        m_pMenu->hide();
        disconnect(m_pMenu, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotMenuSelection(int)));
        delete m_pMenu;
        m_pMenu = 0;
    }
}

void ActivityPage::slotRightButtonPressed(TQListBoxItem * item, const TQPoint & p)
{
    ListPopupMenu::Menu_Type type = ListPopupMenu::mt_Undefined;
    if( item ) { //pressed on an item
        type = ListPopupMenu::mt_Activity_Selected;
    } else { //pressed into fresh air
        type = ListPopupMenu::mt_New_Activity;
    }

    if(m_pMenu) {
        m_pMenu -> hide();
        disconnect(m_pMenu, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotMenuSelection(int)));
        delete m_pMenu;
        m_pMenu = 0;
    }
    m_pMenu = new ListPopupMenu(this, type);
    m_pMenu->popup(p);
    connect(m_pMenu, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotMenuSelection(int)));
}


void ActivityPage::slotTopClicked() {
    int count = m_pActivityLB->count();
    int index = m_pActivityLB->currentItem();
    //shouldn't occur, but just in case
    if( count <= 1 || index <= 0 )
        return;

    //swap the text around in the ListBox
    TQString currentString = m_pActivityLB->text( index );
    m_pActivityLB->removeItem( index );
    m_pActivityLB->insertItem( currentString, 0 );
    //set the moved item selected
    TQListBoxItem* item = m_pActivityLB->item( 0 );
    m_pActivityLB->setSelected( item, true );

    slotClicked(item);
}

void ActivityPage::slotUpClicked() {
    int count = m_pActivityLB -> count();
    int index = m_pActivityLB -> currentItem();
    //shouldn't occur, but just in case
    if( count <= 1 || index <= 0 ) {
        return;
    }

    //swap the text around ( meaning attributes )
    TQString aboveString = m_pActivityLB -> text( index - 1 );
    TQString currentString = m_pActivityLB -> text( index );
    m_pActivityLB -> changeItem( currentString, index -1 );
    m_pActivityLB -> changeItem( aboveString, index );
    //set the moved atttribute selected
    TQListBoxItem * item = m_pActivityLB -> item( index - 1 );
    m_pActivityLB -> setSelected( item, true );
    slotClicked(item);
}

void ActivityPage::slotDownClicked() {
    int count = m_pActivityLB -> count();
    int index = m_pActivityLB -> currentItem();
    //shouldn't occur, but just in case
    if( count <= 1 || index >= count - 1 ) {
        return;
    }

    //swap the text around ( meaning attributes )
    TQString belowString = m_pActivityLB -> text( index + 1 );
    TQString currentString = m_pActivityLB -> text( index );
    m_pActivityLB -> changeItem( currentString, index + 1 );
    m_pActivityLB -> changeItem( belowString, index );
    //set the moved atttribute selected
    TQListBoxItem * item = m_pActivityLB -> item( index + 1 );
    m_pActivityLB -> setSelected( item, true );
    slotClicked(item);
}


void ActivityPage::slotBottomClicked() {
    int count = m_pActivityLB->count();
    int index = m_pActivityLB->currentItem();
    //shouldn't occur, but just in case
    if( count <= 1 || index >= count - 1 )
        return;
   
    //swap the text around in the ListBox
    TQString currentString = m_pActivityLB->text( index );
    m_pActivityLB->removeItem( index );
    m_pActivityLB->insertItem( currentString, m_pActivityLB->count() );
    //set the moved item selected
    TQListBoxItem* item = m_pActivityLB->item( m_pActivityLB->count() - 1 );
    m_pActivityLB->setSelected( item, true );

   slotClicked( item );
}


void ActivityPage::slotClicked(TQListBoxItem *item) {
    //make sure clicked on an item
    if(!item) {
        enableWidgets(false);
        m_pActivityLB -> clearSelection();
    } else {
        enableWidgets(true);
    }
}

void ActivityPage::slotDoubleClicked(TQListBoxItem* item) {
    if (item) {
        slotRename();
    }
}

void ActivityPage::enableWidgets(bool state) {
    if( !state ) {
        m_pTopArrowB->setEnabled( false );
        m_pUpArrowB->setEnabled( false );
        m_pDownArrowB->setEnabled( false );
        m_pBottomArrowB->setEnabled( false );
        m_pDeleteActivityButton->setEnabled(false);
        m_pRenameButton->setEnabled(false);
        return;
    }
    /*now check the order buttons.
        Double check an item is selected
       If only one att. in list make sure there disabled.
        If at top item,only allow down arrow to be enabled.
        If at bottom item. only allow up arrow to be enabled.
    */
    int index = m_pActivityLB->currentItem();
    if( m_pActivityLB->count() == 1 || index == -1 ) {
        m_pTopArrowB->setEnabled(false);
        m_pUpArrowB->setEnabled(false);
        m_pDownArrowB->setEnabled(false);
        m_pBottomArrowB->setEnabled( false );
    } else if( index == 0 ) {
        m_pTopArrowB->setEnabled( false );
        m_pUpArrowB->setEnabled(false);
        m_pDownArrowB->setEnabled(true);
        m_pBottomArrowB->setEnabled(true);
    } else if( index == (int)m_pActivityLB->count() - 1 ) {
        m_pTopArrowB->setEnabled(true);
        m_pUpArrowB->setEnabled(true);
        m_pDownArrowB->setEnabled(false);
        m_pBottomArrowB->setEnabled(false); 
   } else {
        m_pTopArrowB->setEnabled(true);
        m_pUpArrowB->setEnabled(true);
        m_pDownArrowB->setEnabled(true);
        m_pBottomArrowB->setEnabled(true);
    }
    m_pDeleteActivityButton->setEnabled(true);
    m_pRenameButton->setEnabled(true);
}


#include "activitypage.moc"