/***************************************************************************
 *   Copyright (C) 2003 by Sébastien Laoût                                 *
 *   slaout@linux62.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 Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "variouswidgets.h"

#include <QtCore/QList>
#include <QtCore/QPointer>
#include <QtCore/QString>
#include <QLabel>
#include <QSizeGrip>
#include <QPushButton>
#include <QSizePolicy>
#include <QHBoxLayout>
#include <QtGui/QResizeEvent>
#include <QtGui/QKeyEvent>
#include <QVBoxLayout>
#include <QWhatsThis>
#include <QtGui/QDrag>
#include <QtGui/QFontDatabase>
#include <QLineEdit>
#include <QListWidget>
#include <QLocale>
#include <QPushButton>
#include <QDialogButtonBox>

#include <KOpenWithDialog>
#include <KConfigGroup>
#include <KIconLoader>
#include <KLocalizedString>

/** class RunCommandRequester: */

RunCommandRequester::RunCommandRequester(const QString &runCommand, const QString &message, QWidget *parent)
        : QWidget(parent)
{
    m_message = message;

    QHBoxLayout *layout = new QHBoxLayout(this);
    m_runCommand        = new QLineEdit(runCommand, this);
    QPushButton *pb     = new QPushButton(/*"C&hoose..."*/i18n("..."), this);

    pb->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

    layout->addWidget(m_runCommand);
    layout->addWidget(pb);

    connect(pb, SIGNAL(clicked()), this, SLOT(slotSelCommand()));
}

RunCommandRequester::~RunCommandRequester()
{
}

void RunCommandRequester::slotSelCommand()
{
    QPointer<KOpenWithDialog> dlg =  new KOpenWithDialog(QList<QUrl>(), m_message, m_runCommand->text(), this);
    dlg->exec();
    if (! dlg->text().isEmpty())
        m_runCommand->setText(dlg->text());
}

QString RunCommandRequester::runCommand()
{
    return m_runCommand->text();
}

void RunCommandRequester::setRunCommand(const QString &runCommand)
{
    m_runCommand->setText(runCommand);
}

/** class IconSizeCombo: */

IconSizeCombo::IconSizeCombo(QWidget *parent)
        : KComboBox(parent)
{
    addItem(i18n("16 by 16 pixels"));
    addItem(i18n("22 by 22 pixels"));
    addItem(i18n("32 by 32 pixels"));
    addItem(i18n("48 by 48 pixels"));
    addItem(i18n("64 by 64 pixels"));
    addItem(i18n("128 by 128 pixels"));
    setCurrentIndex(2);
}

IconSizeCombo::~IconSizeCombo()
{
}

int IconSizeCombo::iconSize()
{
    switch (currentIndex()) {
    default:
    case 0: return 16;
    case 1: return 22;
    case 2: return 32;
    case 3: return 48;
    case 4: return 64;
    case 5: return 128;
    }
}

void IconSizeCombo::setSize(int size)
{
    switch (size) {
    default:
    case 16:  setCurrentIndex(0); break;
    case 22:  setCurrentIndex(1); break;
    case 32:  setCurrentIndex(2); break;
    case 48:  setCurrentIndex(3); break;
    case 64:  setCurrentIndex(4); break;
    case 128: setCurrentIndex(5); break;
    }
}

/** class ViewSizeDialog: */

ViewSizeDialog::ViewSizeDialog(QWidget *parent, int w, int h)
        : QDialog(parent)
{
    QLabel *label = new QLabel(i18n(
                                   "Resize the window to select the image size\n"
                                   "and close it or press Escape to accept changes."), this);
    label->move(8, 8);
    label->setFixedSize(label->sizeHint());

    // setSizeGripEnabled(true) doesn't work (the grip stay at the same place), so we emulate it:
    m_sizeGrip = new QSizeGrip(this);
    m_sizeGrip->setFixedSize(m_sizeGrip->sizeHint());

    setGeometry(x(), y(), w, h);
}

ViewSizeDialog::~ViewSizeDialog()
{
}

void ViewSizeDialog::resizeEvent(QResizeEvent *)
{
    setWindowTitle(i18n("%1 by %2 pixels", QString::number(width()), QString::number(height())));
    m_sizeGrip->move(width() - m_sizeGrip->width(), height() - m_sizeGrip->height());
}

/** class HelpLabel: */

HelpLabel::HelpLabel(const QString &text, const QString &message, QWidget *parent)
        : KUrlLabel(parent), m_message(message)
{
    setText(text);
    setWhatsThis(m_message);
    connect(this, SIGNAL(leftClickedUrl()), this, SLOT(display()));
}

HelpLabel::~HelpLabel()
{
}

void HelpLabel::display()
{
    QWhatsThis::showText(mapToGlobal(QPoint(width() / 2, height())), m_message);
}

/** class IconSizeDialog: */

class UndraggableKIconView : public QListWidget
{
public:
    UndraggableKIconView(QWidget * parent = 0) : QListWidget(parent) {
        this->setViewMode(QListView::IconMode);
        this->setMovement(QListView::Static);
        this->setSelectionMode(QAbstractItemView::SingleSelection);
        this->setWrapping(false);
    }
    QDrag* dragObject() {
        return 0;
    }
};

IconSizeDialog::IconSizeDialog(const QString &caption, const QString &message, const QString &icon, int iconSize, QWidget *parent)
        : QDialog(parent)
{
    // QDialog options
    setWindowTitle(caption);

    QWidget *mainWidget = new QWidget(this);
    QVBoxLayout *mainLayout = new QVBoxLayout;
    setLayout(mainLayout);
    mainLayout->addWidget(mainWidget);

    setModal(true);

    QWidget *page = new QWidget(this);
    QVBoxLayout *topLayout = new QVBoxLayout(page);

    QLabel *label = new QLabel(message, page);
    topLayout->addWidget(label);

    QListWidget *iconView = new UndraggableKIconView(page);

    m_size16  = new QListWidgetItem(DesktopIcon(icon, 16), i18n("16 by 16 pixels"), iconView);
    m_size22  = new QListWidgetItem(DesktopIcon(icon, 22), i18n("22 by 22 pixels"), iconView);
    m_size32  = new QListWidgetItem(DesktopIcon(icon, 32), i18n("32 by 32 pixels"), iconView);
    m_size48  = new QListWidgetItem(DesktopIcon(icon, 48), i18n("48 by 48 pixels"), iconView);
    m_size64  = new QListWidgetItem(DesktopIcon(icon, 64), i18n("64 by 64 pixels"), iconView);
    m_size128 = new QListWidgetItem(DesktopIcon(icon, 128), i18n("128 by 128 pixels"), iconView);
    iconView->setIconSize(QSize(128, 128));
    iconView->setMinimumSize(QSize(128*6 + (6 + 2) * iconView->spacing() + 20, m_size128->sizeHint().height() + 2 * iconView->spacing() + 20));
    topLayout->addWidget(iconView);
    switch (iconSize) {
    case 16:  m_size16->setSelected(true); m_iconSize = 16;  break;
    case 22:  m_size22->setSelected(true); m_iconSize = 22;  break;
    default:
    case 32:  m_size32->setSelected(true); m_iconSize = 32;  break;
    case 48:  m_size48->setSelected(true); m_iconSize = 48;  break;
    case 64:  m_size64->setSelected(true); m_iconSize = 64;  break;
    case 128: m_size128->setSelected(true); m_iconSize = 128; break;
    }

    connect(iconView, SIGNAL(executed(QListWidgetItem*)),      this, SLOT(choose(QListWidgetItem*)));
    connect(iconView, SIGNAL(itemActivated(QListWidgetItem*)), this, SLOT(choose(QListWidgetItem*)));
    connect(iconView, SIGNAL(itemSelectionChanged()),          this, SLOT(slotSelectionChanged()));

    mainLayout->addWidget(page);

    QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok|QDialogButtonBox::Cancel, this);
    okButton = buttonBox->button(QDialogButtonBox::Ok);
    okButton->setDefault(true);
    okButton->setShortcut(Qt::CTRL | Qt::Key_Return);
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
    mainLayout->addWidget(buttonBox);
    connect(buttonBox->button(QDialogButtonBox::Cancel), SIGNAL(clicked()), SLOT(slotCancel()));
}

IconSizeDialog::~IconSizeDialog()
{
}

void IconSizeDialog::slotSelectionChanged()
{
    // Change m_iconSize to the new selected one:
    if (m_size16->isSelected())  {
        m_iconSize = 16;  return;
    }
    if (m_size22->isSelected())  {
        m_iconSize = 22;  return;
    }
    if (m_size32->isSelected())  {
        m_iconSize = 32;  return;
    }
    if (m_size48->isSelected())  {
        m_iconSize = 48;  return;
    }
    if (m_size64->isSelected())  {
        m_iconSize = 64;  return;
    }
    if (m_size128->isSelected()) {
        m_iconSize = 128; return;
    }

    // But if user unselected the item (by eg. right clicking a free space), reselect the last one:
    switch (m_iconSize) {
    case 16:  m_size16->setSelected(true);  m_iconSize = 16;  break;
    case 22:  m_size22->setSelected(true);  m_iconSize = 22;  break;
    default:
    case 32:  m_size32->setSelected(true);  m_iconSize = 32;  break;
    case 48:  m_size48->setSelected(true);  m_iconSize = 48;  break;
    case 64:  m_size64->setSelected(true);  m_iconSize = 64;  break;
    case 128: m_size128->setSelected(true); m_iconSize = 128; break;
    }
}

void IconSizeDialog::choose(QListWidgetItem *)
{
    okButton->animateClick();
}

void IconSizeDialog::slotCancel()
{
    m_iconSize = -1;
}

/** class FontSizeCombo: */

FontSizeCombo::FontSizeCombo(bool rw, bool withDefault, QWidget *parent)
        : KComboBox(rw, parent), m_withDefault(withDefault)
{
    if (m_withDefault)
        addItem(i18n("(Default)"));

    QFontDatabase fontDB;
    QList<int> sizes = fontDB.standardSizes();
    for (QList<int>::Iterator it = sizes.begin(); it != sizes.end(); ++it)
        addItem(QString::number(*it));

//  connect( this, SIGNAL(acivated(const QString&)), this, SLOT(textChangedInCombo(const QString&)) );
    connect(this, SIGNAL(editTextChanged(const QString&)), this, SLOT(textChangedInCombo(const QString&)));

    // TODO: 01617 void KFontSizeAction::setFontSize( int size )
}

FontSizeCombo::~FontSizeCombo()
{
}

void FontSizeCombo::textChangedInCombo(const QString &text)
{
    bool ok = false;
    int size = text.toInt(&ok);
    if (ok)
        emit sizeChanged(size);
}

void FontSizeCombo::keyPressEvent(QKeyEvent *event)
{
    if (event->key() == Qt::Key_Escape)
        emit escapePressed();
    else if (event->key() == Qt::Key_Return)
        emit returnPressed2();
    else
        KComboBox::keyPressEvent(event);
}

void FontSizeCombo::setFontSize(qreal size)
{
    setItemText(currentIndex(), QString::number(size));

    // TODO: SEE KFontSizeAction::setFontSize( int size ) !!! for a more complete method!
}

qreal FontSizeCombo::fontSize()
{
    bool ok = false;
    int size = currentText().toInt(&ok);
    if (ok)
        return size;

    size = currentText().toInt(&ok);
    if (ok)
        return size;

    return font().pointSize();
}