/*
  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) 2006 Dario Abatianni <eisfuchs@tigress.com>
  Copyright (C) 2006 John Tapsell <johnflux@gmail.com>
*/

#include "quickbuttons_config.h"
#include "preferences.h"

#include <QPushButton>


QuickButtons_Config::QuickButtons_Config(QWidget* parent, const char* name)
 : QWidget(parent)
{
  setObjectName(QString::fromLatin1(name));
  setupUi(this);

  // reset flag to defined state (used to block signals when just selecting a new item)
  m_newItemSelected=false;

  // populate listview
  loadSettings();

  connect(buttonListView,SIGNAL (currentItemChanged(QTreeWidgetItem*,QTreeWidgetItem*)),this,SLOT (entrySelected(QTreeWidgetItem*)) );

  connect(nameInput,SIGNAL (textChanged(QString)),this,SLOT (nameChanged(QString)) );
  connect(actionInput,SIGNAL (textChanged(QString)),this,SLOT (actionChanged(QString)) );

  connect(newButton,SIGNAL (clicked()),this,SLOT (addEntry()));
  connect(removeButton,SIGNAL (clicked()),this,SLOT (removeEntry()));
}

QuickButtons_Config::~QuickButtons_Config()
{
}

void QuickButtons_Config::loadSettings()
{
  setButtonsListView(Preferences::quickButtonList());

  // remember button list for hasChanged()
  m_oldButtonList=Preferences::quickButtonList();
}

// fill listview with button definitions
void QuickButtons_Config::setButtonsListView(const QStringList &buttonList)
{
    buttonListView->clear();

    QStringListIterator it(buttonList);

    while (it.hasNext())
    {
        QString definition = it.next();

        QTreeWidgetItem *item = new QTreeWidgetItem(buttonListView, QStringList() << definition.section(',',0,0) << definition.section(',',1));

        item->setFlags(item->flags() &~ Qt::ItemIsDropEnabled);
    }

    buttonListView->setCurrentItem(buttonListView->topLevelItem(0));
}

// save quick buttons to configuration
void QuickButtons_Config::saveSettings()
{
  // get configuration object
  KSharedConfigPtr config=KGlobal::config();

  // delete all buttons
  config->deleteGroup("Button List");
  // create new empty button group
  KConfigGroup grp = config->group("Button List");

  // create empty list
  QStringList newList=currentButtonList();

  // check if there are any quick buttons in the list view
  if(newList.count())
  {
    // go through all buttons and save them into the configuration
    for(int index=0;index<newList.count();index++)
    {
      // write the current button's name and definition
      grp.writeEntry(QString("Button%1").arg(index),newList[index]);
    } // for
  }
  // if there were no buttons at all, write a dummy entry to prevent KConfigXT from "optimizing"
  // the group out, which would in turn make konvi restore the default buttons
  else
    grp.writeEntry("Empty List",QString());

  // set internal button list
  Preferences::setQuickButtonList(newList);

  // remember button list for hasChanged()
  m_oldButtonList=newList;
}

void QuickButtons_Config::restorePageToDefaults()
{
  setButtonsListView(Preferences::defaultQuickButtonList());
}

QStringList QuickButtons_Config::currentButtonList()
{
  QStringList newList;

  QTreeWidgetItem* item = 0;

  for (int index = 0; index < buttonListView->topLevelItemCount(); index++)
  {
      item = buttonListView->topLevelItem(index);

      newList.append(item->text(0)+','+item->text(1));
  }

  return newList;
}

bool QuickButtons_Config::hasChanged()
{
  return(m_oldButtonList!=currentButtonList());
}

// slots

// what to do when the user selects an item
void QuickButtons_Config::entrySelected(QTreeWidgetItem* quickButtonEntry)
{
  // play it safe, assume disabling all widgets first
  bool enabled=false;

  // check if there really was an item selected
  if(quickButtonEntry)
  {
    // remember to enable the editing widgets
    enabled=true;

    // tell the editing widgets not to emit modified() on signals now
    m_newItemSelected=true;
    // update editing widget contents
    nameInput->setText(quickButtonEntry->text(0));
    actionInput->setText(quickButtonEntry->text(1));
    // re-enable modified() signal on text changes in edit widgets
    m_newItemSelected=false;
  }
  // enable or disable editing widgets
  removeButton->setEnabled(enabled);
  nameLabel->setEnabled(enabled);
  nameInput->setEnabled(enabled);
  actionLabel->setEnabled(enabled);
  actionInput->setEnabled(enabled);
}

// what to do when the user change the name of a quick button
void QuickButtons_Config::nameChanged(const QString& newName)
{
  // get possible first selected item
  QTreeWidgetItem* item=buttonListView->currentItem();

  // sanity check
  if(item)
  {
    // rename item
    item->setText(0,newName);
    // tell the config system that something has changed
    if(!m_newItemSelected) emit modified();
  }
}

// what to do when the user change the action definition of a quick button
void QuickButtons_Config::actionChanged(const QString& newAction)
{
  // get possible first selected item
  QTreeWidgetItem* item=buttonListView->currentItem();

  // sanity check
  if(item)
  {
    // rename item
    item->setText(1,newAction);
    // tell the config system that something has changed
    if(!m_newItemSelected) emit modified();
  }
}

// add button pressed
void QuickButtons_Config::addEntry()
{
  // add new item at the bottom of list view
  QTreeWidgetItem* newItem = new QTreeWidgetItem(buttonListView, buttonListView->topLevelItemCount());

  if (newItem)
  {
    newItem->setFlags(newItem->flags() &~ Qt::ItemIsDropEnabled);
    newItem->setText(0, i18n("New"));

    // select new item and make it the current one
    buttonListView->setCurrentItem(newItem);
    // set input focus on item name edit
    nameInput->setFocus();
    // select all text to make overwriting easier
    nameInput->selectAll();
    // tell the config system that something has changed
    emit modified();
  }
}

// remove button pressed
void QuickButtons_Config::removeEntry()
{
  // get possible first selected item
  QTreeWidgetItem* item=buttonListView->currentItem();

  // sanity check
  if(item)
  {
    // get item below the current one
    QTreeWidgetItem* nextItem=buttonListView->itemBelow(item);
    // if there was none, get the one above
    if(!nextItem) nextItem=buttonListView->itemAbove(item);

    // remove the item from the list
    delete item;

    // check if we found the next item
    if(nextItem)
    {
      // select the item and make it the current item
      buttonListView->setCurrentItem(nextItem);
    }
    else
    {
      // no next item found, this means the list is empty
      entrySelected(0);
    }
    // tell the config system that somethig has changed
    emit modified();
  }
}

#include "quickbuttons_config.moc"
