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#include "orderdialog_p.h"

#include "iconloader_p.h"

#include "ui_orderdialog.h"

#include <QtDesigner/QExtensionManager>

#include <QtDesigner/QDesignerFormEditorInterface>

#include <QtDesigner/QDesignerContainerExtension>

#include <QtCore/QAbstractItemModel>

#include <QtCore/QModelIndex>

#include <QtGui/QPushButton>

QT_BEGIN_NAMESPACE

// OrderDialog: Used to reorder the pages of QStackedWidget and QToolBox.

// Provides up and down buttons as well as  DnD via QAbstractItemView::InternalMove mode

namespace qdesigner_internal {

OrderDialog::OrderDialog(QWidget *parent) :

    QDialog(parent),

    m_ui(new Ui::OrderDialog),

    m_format(PageOrderFormat)

{

    m_ui->setupUi(this);

    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);

    m_ui->upButton->setIcon(createIconSet(QString::fromUtf8("up.png")));

    m_ui->downButton->setIcon(createIconSet(QString::fromUtf8("down.png")));

    m_ui->buttonBox->button(QDialogButtonBox::Ok)->setDefault(true);

    connect(m_ui->buttonBox->button(QDialogButtonBox::Reset), SIGNAL(clicked()), this, SLOT(slotReset()));

    // Catch the remove operation of a DnD operation in QAbstractItemView::InternalMove mode to enable buttons

    // Selection mode is 'contiguous' to enable DnD of groups

    connect(m_ui->pageList->model(), SIGNAL(rowsRemoved(QModelIndex,int,int)), this, SLOT(slotEnableButtonsAfterDnD()));

    m_ui->upButton->setEnabled(false);

    m_ui->downButton->setEnabled(false);

}

OrderDialog::~OrderDialog()

{

    delete  m_ui;

}

void OrderDialog::setDescription(const QString &d)

{

     m_ui->groupBox->setTitle(d);

}

void OrderDialog::setPageList(const QWidgetList &pages)

{

    // The QWidget* are stored in a map indexed by the old index.

    // The old index is set as user data on the item instead of the QWidget*

    // because DnD is enabled which requires the user data to serializable

    m_orderMap.clear();

    const int count = pages.count();

    for (int i=0; i < count; ++i)

        m_orderMap.insert(i, pages.at(i));

    buildList();

}

void OrderDialog::buildList()

{

    m_ui->pageList->clear();

    const OrderMap::const_iterator cend = m_orderMap.constEnd();

    for (OrderMap::const_iterator it = m_orderMap.constBegin(); it != cend; ++it) {

        QListWidgetItem *item = new QListWidgetItem();

        const int index = it.key();

        switch (m_format) {

        case PageOrderFormat:

            item->setText(tr("Index %1 (%2)").arg(index).arg(it.value()->objectName()));

            break;

        case TabOrderFormat:

            item->setText(tr("%1 %2").arg(index+1).arg(it.value()->objectName()));

            break;

        }

        item->setData(Qt::UserRole, QVariant(index));

        m_ui->pageList->addItem(item);

    }

    if (m_ui->pageList->count() > 0)

        m_ui->pageList->setCurrentRow(0);

}

void OrderDialog::slotReset()

{

    buildList();

}

QWidgetList OrderDialog::pageList() const

{

    QWidgetList rc;

    const int count = m_ui->pageList->count();

    for (int i=0; i < count; ++i) {

        const int oldIndex = m_ui->pageList->item(i)->data(Qt::UserRole).toInt();

        rc.append(m_orderMap.value(oldIndex));

    }

    return rc;

}

void OrderDialog::on_upButton_clicked()

{

    const int row = m_ui->pageList->currentRow();

    if (row <= 0)

        return;

    m_ui->pageList->insertItem(row - 1, m_ui->pageList->takeItem(row));

    m_ui->pageList->setCurrentRow(row - 1);

}

void OrderDialog::on_downButton_clicked()

{

    const int row = m_ui->pageList->currentRow();

    if (row == -1 || row == m_ui->pageList->count() - 1)

        return;

    m_ui->pageList->insertItem(row + 1, m_ui->pageList->takeItem(row));

    m_ui->pageList->setCurrentRow(row + 1);

}

void OrderDialog::slotEnableButtonsAfterDnD()

{

    enableButtons(m_ui->pageList->currentRow());

}

void OrderDialog::on_pageList_currentRowChanged(int r)

{

    enableButtons(r);

}

void OrderDialog::enableButtons(int r)

{

    m_ui->upButton->setEnabled(r > 0);

    m_ui->downButton->setEnabled(r >= 0 && r < m_ui->pageList->count() - 1);

}

QWidgetList OrderDialog::pagesOfContainer(const QDesignerFormEditorInterface *core, QWidget *container)

{

    QWidgetList rc;

    if (QDesignerContainerExtension* ce = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), container)) {

        const int count = ce->count();

        for (int i = 0; i < count ;i ++)

            rc.push_back(ce->widget(i));

    }

    return rc;

}

}

QT_END_NAMESPACE