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/*
 *  Copyright (c) 2000 Kurt Granroth <granroth@kde.org>
 *  Copyright (c) 2000 Matthias Elter <elter@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.
 *
 *  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
 */

#include <tqcheckbox.h>
#include <tqcombobox.h>
#include <tqlayout.h>
#include <tqtimer.h>
#include <tqvaluelist.h>

#include <dcopclient.h>

#include <kaboutdata.h>
#include <kapplication.h>
#include <kconfig.h>
#include <kdialog.h>
#include <kgenericfactory.h>
#include <twin.h>
#include <kcolorbutton.h>
#include <tqlabel.h>

#define protected public
#include "kcmtaskbarui.h"
#undef protected
#include "taskbarsettings.h"

#include "kcmtaskbar.h"
#include "kcmtaskbar.moc"

typedef KGenericFactory<TaskbarConfig, TQWidget > TaskBarFactory;
K_EXPORT_COMPONENT_FACTORY (kcm_taskbar, TaskBarFactory("kcmtaskbar") )

TaskbarAppearance::TaskbarAppearance(TQString name,
                                     bool drawButtons,
                                     bool haloText,
                                     bool showButtonOnHover)
    : m_name(name),
      m_drawButtons(drawButtons),
      m_haloText(haloText),
      m_showButtonOnHover(showButtonOnHover)
{
}

TaskbarAppearance::TaskbarAppearance()
    : m_drawButtons(false),
      m_haloText(false),
      m_showButtonOnHover(true)
{
}

bool TaskbarAppearance::matchesSettings() const
{
    return TaskBarSettings::drawButtons() == m_drawButtons &&
           TaskBarSettings::haloText() == m_haloText &&
           TaskBarSettings::showButtonOnHover() == m_showButtonOnHover;
}

void TaskbarAppearance::alterSettings() const
{
    TaskBarSettings::self()->setDrawButtons(m_drawButtons);
    TaskBarSettings::self()->setHaloText(m_haloText);
    TaskBarSettings::self()->setShowButtonOnHover(m_showButtonOnHover);
}

// These are the strings that are actually stored in the config file.
const TQStringList& TaskbarConfig::actionList()
{
    static TQStringList list(
            TQStringList() << I18N_NOOP("Show Task List") << I18N_NOOP("Show Operations Menu")
            << I18N_NOOP("Activate, Raise or Minimize Task")
            << I18N_NOOP("Activate Task") << I18N_NOOP("Raise Task")
            << I18N_NOOP("Lower Task") << I18N_NOOP("Minimize Task")
            << I18N_NOOP("To Current Desktop")
            << I18N_NOOP("Close Task") );
    return list;
}

// Get a translated version of the above string list.
TQStringList TaskbarConfig::i18nActionList()
{
   TQStringList i18nList;
   for( TQStringList::ConstIterator it = actionList().begin(); it != actionList().end(); ++it ) {
      i18nList << i18n((*it).latin1());
   }
   return i18nList;
}

// These are the strings that are actually stored in the config file.
const TQStringList& TaskbarConfig::groupModeList()
{
    static TQStringList list(
            TQStringList() << I18N_NOOP("Never") << I18N_NOOP("When Taskbar Full")
            << I18N_NOOP("Always"));
    return list;
}

// Get a translated version of the above string list.
TQStringList TaskbarConfig::i18nGroupModeList()
{
   TQStringList i18nList;
   for( TQStringList::ConstIterator it = groupModeList().begin(); it != groupModeList().end(); ++it ) {
      i18nList << i18n((*it).latin1());
   }
   return i18nList;
}

TaskbarConfig::TaskbarConfig(TQWidget *parent, const char* name, const TQStringList&)
  : KCModule(TaskBarFactory::instance(), parent, name)
{
    TQVBoxLayout *layout = new TQVBoxLayout(this, 0, KDialog::spacingHint());
    m_widget = new TaskbarConfigUI(this);
    layout->addWidget(m_widget);

    // TODO: Load these from .desktop files?
    m_appearances.append(TaskbarAppearance(i18n("Elegant"), false, false, true));
    m_appearances.append(TaskbarAppearance(i18n("Classic"), true, false, true));
    m_appearances.append(TaskbarAppearance(i18n("For Transparency"), false, true, true));

    for (TaskbarAppearance::List::const_iterator it = m_appearances.constBegin();
         it != m_appearances.constEnd();
         ++it)
    {
        m_widget->appearance->insertItem((*it).name());
    }

    connect(m_widget->appearance, TQT_SIGNAL(activated(int)),
            this, TQT_SLOT(appearanceChanged(int)));
    addConfig(TaskBarSettings::self(), m_widget);

    setQuickHelp(i18n("<h1>Taskbar</h1> You can configure the taskbar here."
                " This includes options such as whether or not the taskbar should show all"
                " windows at once or only those on the current desktop."
                " You can also configure whether or not the Window List button will be displayed."));

    TQStringList list = i18nActionList();
    m_widget->kcfg_LeftButtonAction->insertStringList(list);
    m_widget->kcfg_MiddleButtonAction->insertStringList(list);
    m_widget->kcfg_RightButtonAction->insertStringList(list);
    m_widget->kcfg_GroupTasks->insertStringList(i18nGroupModeList());

    connect(m_widget->kcfg_GroupTasks, TQT_SIGNAL(activated(int)),
            this, TQT_SLOT(slotUpdateComboBox()));
    connect(m_widget->kcfg_UseCustomColors, TQT_SIGNAL(stateChanged(int)), this, TQT_SLOT(slotUpdateCustomColors()));

    slotUpdateCustomColors();
    updateAppearanceCombo();

    if (KWin::numberOfDesktops() < 2)
    {
        m_widget->kcfg_ShowAllWindows->hide();
        m_widget->kcfg_SortByDesktop->hide();
        m_widget->spacer2->changeSize(0, 0);
    }

    if (!TQApplication::desktop()->isVirtualDesktop() ||
        TQApplication::desktop()->numScreens() == 1) // No Ximerama
    {
        m_widget->showAllScreens->hide();
    }
    connect( m_widget->showAllScreens, TQT_SIGNAL( stateChanged( int )), TQT_SLOT( changed()));

    KAboutData *about = new KAboutData(I18N_NOOP("kcmtaskbar"),
                                       I18N_NOOP("TDE Taskbar Control Module"),
                                       0, 0, KAboutData::License_GPL,
                                       I18N_NOOP("(c) 2000 - 2001 Matthias Elter"));

    about->addAuthor("Matthias Elter", 0, "elter@kde.org");
    about->addCredit("Stefan Nikolaus", I18N_NOOP("KConfigXT conversion"),
                     "stefan.nikolaus@kdemail.net");
    setAboutData(about);

    load();
    TQTimer::singleShot(0, this, TQT_SLOT(notChanged()));
}

void TaskbarConfig::slotUpdateCustomColors()
{
    m_widget->kcfg_ActiveTaskTextColor->setEnabled(m_widget->kcfg_UseCustomColors->isChecked());
    m_widget->activeTaskTextColorLabel->setEnabled(m_widget->kcfg_UseCustomColors->isChecked());
    
    m_widget->kcfg_InactiveTaskTextColor->setEnabled(m_widget->kcfg_UseCustomColors->isChecked());
    m_widget->inactiveTaskTextColorLabel->setEnabled(m_widget->kcfg_UseCustomColors->isChecked());
    
    m_widget->kcfg_TaskBackgroundColor->setEnabled(m_widget->kcfg_UseCustomColors->isChecked());
    m_widget->taskBackgroundColorLabel->setEnabled(m_widget->kcfg_UseCustomColors->isChecked());
}

void TaskbarConfig::slotUpdateComboBox()
{
    int pos = TaskBarSettings::ActivateRaiseOrMinimize;
    // If grouping is enabled, call "Activate, Raise or Iconify something else,
    // though the config key used is the same.
    if(m_widget->kcfg_GroupTasks->currentItem() != TaskBarSettings::GroupNever)
    {
        m_widget->kcfg_LeftButtonAction->changeItem(i18n("Cycle Through Windows"), pos);
        m_widget->kcfg_MiddleButtonAction->changeItem(i18n("Cycle Through Windows"), pos);
        m_widget->kcfg_RightButtonAction->changeItem(i18n("Cycle Through Windows"), pos);
    }
    else
    {
        TQString action = i18nActionList()[pos];
        m_widget->kcfg_LeftButtonAction->changeItem(action,pos);
        m_widget->kcfg_MiddleButtonAction->changeItem(action,pos);
        m_widget->kcfg_RightButtonAction->changeItem(action,pos);
    }
}

void TaskbarConfig::updateAppearanceCombo()
{
    unsigned int i = 0;
    for (TaskbarAppearance::List::const_iterator it = m_appearances.constBegin();
         it != m_appearances.constEnd();
         ++it, ++i)
    {
        if ((*it).matchesSettings())
        {
            break;
        }
    }

    if (i < m_appearances.count())
    {
        m_widget->appearance->setCurrentItem(i);
        return;
    }

    if (m_widget->appearance->count() == m_appearances.count())
    {
        m_widget->appearance->insertItem(i18n("Custom"));
    }

    m_widget->appearance->setCurrentItem(m_appearances.count());
}

void TaskbarConfig::appearanceChanged(int selected)
{
    if (selected < m_appearances.count())
    {
        unmanagedWidgetChangeState(!m_appearances[selected].matchesSettings());
    }
}

void TaskbarConfig::load()
{
    KCModule::load();
    slotUpdateComboBox();
    updateAppearanceCombo();
    m_widget->showAllScreens->setChecked(!TaskBarSettings::self()->showCurrentScreenOnly());
}

void TaskbarConfig::save()
{
    TaskBarSettings::self()->setShowCurrentScreenOnly(!m_widget->showAllScreens->isChecked());
    int selectedAppearance = m_widget->appearance->currentItem();
    if (selectedAppearance < m_appearances.count())
    {
        m_appearances[selectedAppearance].alterSettings();
        TaskBarSettings::self()->writeConfig();
    }

    KCModule::save();

    TQByteArray data;
    kapp->dcopClient()->emitDCOPSignal("kdeTaskBarConfigChanged()", data);
}

void TaskbarConfig::defaults()
{
    KCModule::defaults();
    slotUpdateComboBox();
    updateAppearanceCombo();
}

void TaskbarConfig::notChanged()
{
    emit changed(false);
}