/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "signalsloteditorwindow.h"
#include "signalsloteditor_p.h"
#include "signalsloteditor.h"
#include "signalslot_utils_p.h"

#include <iconloader_p.h>
#include <spacer_widget_p.h>
#include <qlayout_widget_p.h>

#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerFormWindowManagerInterface>
#include <QtDesigner/QExtensionManager>
#include <QtDesigner/QDesignerIntegrationInterface>
#include <QtDesigner/QDesignerContainerExtension>
#include <QtDesigner/QDesignerMetaDataBaseInterface>
#include <QtDesigner/QDesignerFormWindowCursorInterface>
#include <abstractdialoggui_p.h>

#include <QtCore/QAbstractItemModel>
#include <QtCore/QDebug>
#include <QtWidgets/QAction>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QMenu>
#include <QtCore/QSortFilterProxyModel>
#include <QtGui/QStandardItemModel>
#include <QtWidgets/QComboBox>
#include <QtWidgets/QApplication>
#include <QtWidgets/QItemDelegate>
#include <QtWidgets/QItemEditorFactory>
#include <QtWidgets/QTreeView>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QToolButton>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QToolBar>

QT_BEGIN_NAMESPACE

// Add suitable form widgets to a list of objects for the  signal slot
// editor. Prevent special widgets from showing up there.
static void addWidgetToObjectList(const QWidget *w, QStringList &r)
{
    const QMetaObject *mo = w->metaObject();
    if (mo != &QLayoutWidget::staticMetaObject && mo != &Spacer::staticMetaObject) {
        const QString name = w->objectName().trimmed();
        if (!name.isEmpty())
            r.push_back(name);
    }
}

static QStringList objectNameList(QDesignerFormWindowInterface *form)
{
    typedef QList<QAction*> ActionList;
    typedef QList<QButtonGroup *> ButtonGroupList;

    QStringList result;

    QWidget *mainContainer = form->mainContainer();
    if (!mainContainer)
        return result;

    // Add main container container pages (QStatusBar, QWizardPages) etc.
    // to the list. Pages of containers on the form are not added, however.
    if (const QDesignerContainerExtension *c = qt_extension<QDesignerContainerExtension *>(form->core()->extensionManager(), mainContainer)) {
        const int count = c->count();
        for (int i = 0 ; i < count; i++)
            addWidgetToObjectList(c->widget(i), result);
    }

    const QDesignerFormWindowCursorInterface *cursor = form->cursor();
    const int widgetCount = cursor->widgetCount();
    for (int i = 0; i < widgetCount; ++i)
        addWidgetToObjectList(cursor->widget(i), result);

    const QDesignerMetaDataBaseInterface *mdb = form->core()->metaDataBase();

    // Add managed actions and actions with managed menus
    const ActionList actions = mainContainer->findChildren<QAction*>();
    if (!actions.empty()) {
        const ActionList::const_iterator cend = actions.constEnd();
        for (ActionList::const_iterator it = actions.constBegin(); it != cend; ++it) {
            QAction *a = *it;
            if (!a->isSeparator()) {
                if (QMenu *menu = a->menu()) {
                    if (mdb->item(menu))
                        result.push_back(menu->objectName());
                } else {
                    if (mdb->item(a))
                        result.push_back(a->objectName());
                }
            }
        }
    }

    // Add  managed buttons groups
    const ButtonGroupList buttonGroups = mainContainer->findChildren<QButtonGroup *>();
    if (!buttonGroups.empty()) {
        const ButtonGroupList::const_iterator cend = buttonGroups.constEnd();
        for (ButtonGroupList::const_iterator it = buttonGroups.constBegin(); it != cend; ++it)
            if (mdb->item(*it))
                result.append((*it)->objectName());
    }

    result.sort();
    return result;
}

namespace qdesigner_internal {

// ------------  ConnectionModel

ConnectionModel::ConnectionModel(QObject *parent)  :
    QAbstractItemModel(parent)
{
}

void ConnectionModel::setEditor(SignalSlotEditor *editor)
{
    if (m_editor == editor)
        return;
    beginResetModel();

    if (m_editor) {
        disconnect(m_editor, SIGNAL(connectionAdded(Connection*)),
                   this, SLOT(connectionAdded(Connection*)));
        disconnect(m_editor, SIGNAL(connectionRemoved(int)),
                   this, SLOT(connectionRemoved(int)));
        disconnect(m_editor, SIGNAL(aboutToRemoveConnection(Connection*)),
                   this, SLOT(aboutToRemoveConnection(Connection*)));
        disconnect(m_editor, SIGNAL(aboutToAddConnection(int)),
                this, SLOT(aboutToAddConnection(int)));
        disconnect(m_editor, SIGNAL(connectionChanged(Connection*)),
                   this, SLOT(connectionChanged(Connection*)));
    }
    m_editor = editor;
    if (m_editor) {
        connect(m_editor, SIGNAL(connectionAdded(Connection*)),
                this, SLOT(connectionAdded(Connection*)));
        connect(m_editor, SIGNAL(connectionRemoved(int)),
                this, SLOT(connectionRemoved(int)));
        connect(m_editor, SIGNAL(aboutToRemoveConnection(Connection*)),
                this, SLOT(aboutToRemoveConnection(Connection*)));
        connect(m_editor, SIGNAL(aboutToAddConnection(int)),
                this, SLOT(aboutToAddConnection(int)));
        connect(m_editor, SIGNAL(connectionChanged(Connection*)),
                this, SLOT(connectionChanged(Connection*)));
    }
    endResetModel();
}

QVariant ConnectionModel::headerData(int section, Qt::Orientation orientation,
                                        int role) const
{
    if (orientation == Qt::Vertical || role != Qt::DisplayRole)
        return QVariant();

    static const QVariant senderTitle = tr("Sender");
    static const QVariant signalTitle = tr("Signal");
    static const QVariant receiverTitle = tr("Receiver");
    static const QVariant slotTitle = tr("Slot");

    switch (section) {
    case 0:
        return senderTitle;
    case 1:
        return signalTitle;
    case 2:
        return receiverTitle;
    case 3:
        return slotTitle;
    }
    return  QVariant();
}

QModelIndex ConnectionModel::index(int row, int column,
                                    const QModelIndex &parent) const
{
    if (parent.isValid() || !m_editor)
        return QModelIndex();
    if (row < 0 || row >= m_editor->connectionCount())
        return QModelIndex();
    return createIndex(row, column);
}

Connection *ConnectionModel::indexToConnection(const QModelIndex &index) const
{
    if (!index.isValid() || !m_editor)
        return 0;
    if (index.row() < 0 || index.row() >= m_editor->connectionCount())
        return 0;
    return m_editor->connection(index.row());
}

QModelIndex ConnectionModel::connectionToIndex(Connection *con) const
{
    Q_ASSERT(m_editor);
    return createIndex(m_editor->indexOfConnection(con), 0);
}

QModelIndex ConnectionModel::parent(const QModelIndex&) const
{
    return QModelIndex();
}

int ConnectionModel::rowCount(const QModelIndex &parent) const
{
    if (parent.isValid() || !m_editor)
        return 0;
    return m_editor->connectionCount();
}

int ConnectionModel::columnCount(const QModelIndex &parent) const
{
    if (parent.isValid())
        return 0;
    return 4;
}

QVariant ConnectionModel::data(const QModelIndex &index, int role) const
{
    enum { deprecatedMember = 0 };

    if ((role != Qt::DisplayRole && role != Qt::EditRole && role != Qt::FontRole && role != Qt::ForegroundRole) || !m_editor)
        return QVariant();

    if (index.row() < 0 || index.row() >= m_editor->connectionCount()) {
        return QVariant();
    }

    const SignalSlotConnection *con = static_cast<SignalSlotConnection*>(m_editor->connection(index.row()));
    Q_ASSERT(con != 0);

    // Mark deprecated slots red/italic. Not currently in use (historically for Qt 3 slots in Qt 4),
    // but may be used again in the future.
    if (deprecatedMember && role == Qt::ForegroundRole)
        return QColor(Qt::red);
    if (deprecatedMember && role ==  Qt::FontRole) {
        QFont font = QApplication::font();
        font.setItalic(true);
        return font;
    }

    static const QVariant senderDefault = tr("<sender>");
    static const QVariant signalDefault = tr("<signal>");
    static const QVariant receiverDefault = tr("<receiver>");
    static const QVariant slotDefault = tr("<slot>");

    switch (index.column()) {
        case 0: {
            const QString sender = con->sender();
            if (sender.isEmpty())
                return senderDefault;
            return sender;
        }
        case 1: {
            const QString signal = con->signal();
            if (signal.isEmpty())
                return signalDefault;
            return signal;
        }
        case 2: {
            const QString receiver = con->receiver();
            if (receiver.isEmpty())
                return receiverDefault;
            return receiver;
        }
        case 3: {
            const QString slot = con->slot();
            if (slot.isEmpty())
                return slotDefault;
            return slot;
        }
    }
    return QVariant();
}

bool ConnectionModel::setData(const QModelIndex &index, const QVariant &data, int)
{
    if (!index.isValid() || !m_editor)
        return false;
    if (data.type() != QVariant::String)
        return false;

    SignalSlotConnection *con = static_cast<SignalSlotConnection*>(m_editor->connection(index.row()));
    QDesignerFormWindowInterface *form = m_editor->formWindow();

    QString s = data.toString();
    switch (index.column()) {
        case 0:
            if (!s.isEmpty() && !objectNameList(form).contains(s))
                s.clear();
            m_editor->setSource(con, s);
            break;
        case 1:
            if (!memberFunctionListContains(form->core(), con->object(CETypes::EndPoint::Source), SignalMember, s))
                s.clear();
            m_editor->setSignal(con, s);
            break;
        case 2:
            if (!s.isEmpty() && !objectNameList(form).contains(s))
                s.clear();
            m_editor->setTarget(con, s);
            break;
        case 3:
            if (!memberFunctionListContains(form->core(), con->object(CETypes::EndPoint::Target), SlotMember, s))
                s.clear();
            m_editor->setSlot(con, s);
            break;
    }

    return true;
}

void ConnectionModel::connectionAdded(Connection*)
{
    endInsertRows();
}

void ConnectionModel::connectionRemoved(int)
{
    endRemoveRows();
}

void ConnectionModel::aboutToRemoveConnection(Connection *con)
{
    Q_ASSERT(m_editor);
    int idx = m_editor->indexOfConnection(con);
    beginRemoveRows(QModelIndex(), idx, idx);
}

void ConnectionModel::aboutToAddConnection(int idx)
{
    Q_ASSERT(m_editor);
    beginInsertRows(QModelIndex(), idx, idx);
}

Qt::ItemFlags ConnectionModel::flags(const QModelIndex&) const
{
    return Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsEnabled;
}

void ConnectionModel::connectionChanged(Connection *con)
{
    Q_ASSERT(m_editor);
    const int idx = m_editor->indexOfConnection(con);
    SignalSlotConnection *changedCon = static_cast<SignalSlotConnection*>(m_editor->connection(idx));
    SignalSlotConnection *c = 0;
    for (int i=0; i<m_editor->connectionCount(); ++i) {
        if (i == idx)
            continue;
        c = static_cast<SignalSlotConnection*>(m_editor->connection(i));
        if (c->sender() == changedCon->sender() && c->signal() == changedCon->signal()
            && c->receiver() == changedCon->receiver() && c->slot() == changedCon->slot()) {
            const QString message = tr("The connection already exists!<br>%1").arg(changedCon->toString());
            m_editor->formWindow()->core()->dialogGui()->message(m_editor->parentWidget(), QDesignerDialogGuiInterface::SignalSlotEditorMessage,
                                                                 QMessageBox::Warning,  tr("Signal and Slot Editor"), message, QMessageBox::Ok);
            break;
        }
    }
    emit dataChanged(createIndex(idx, 0), createIndex(idx, 3));
}

void ConnectionModel::updateAll()
{
    emit dataChanged(index(0, 0), index(rowCount(), columnCount()));
}
}

namespace {
// ---------------------- InlineEditorModel

class InlineEditorModel : public QStandardItemModel
{
    Q_OBJECT
public:
    enum {  TitleItem = 1 };

    InlineEditorModel(int rows, int cols, QObject *parent = 0);

    void addTitle(const QString &title);
    void addTextList(const QMap<QString, bool> &text_list);
    void addText(const QString &text);
    bool isTitle(int idx) const;

    int findText(const QString &text) const;

    virtual Qt::ItemFlags flags(const QModelIndex &index) const;
};

InlineEditorModel::InlineEditorModel(int rows, int cols, QObject *parent)
    : QStandardItemModel(rows, cols, parent)
{
}

void InlineEditorModel::addTitle(const QString &title)
{
    const int cnt = rowCount();
    insertRows(cnt, 1);
    QModelIndex cat_idx = index(cnt, 0);
    setData(cat_idx, QString(title + QLatin1Char(':')), Qt::DisplayRole);
    setData(cat_idx, TitleItem, Qt::UserRole);
    QFont font = QApplication::font();
    font.setBold(true);
    setData(cat_idx, font, Qt::FontRole);
}

bool InlineEditorModel::isTitle(int idx) const
{
    if (idx == -1)
        return false;

    return data(index(idx, 0), Qt::UserRole).toInt() == TitleItem;
}

void InlineEditorModel::addText(const QString &text)
{
    const int cnt = rowCount();
    insertRows(cnt, 1);
    setData(index(cnt, 0), text, Qt::DisplayRole);
}

void InlineEditorModel::addTextList(const QMap<QString, bool> &text_list)
{
    int cnt = rowCount();
    insertRows(cnt, text_list.size());
    QFont font = QApplication::font();
    font.setItalic(true);
    QVariant fontVariant = QVariant::fromValue(font);
    QMap<QString, bool>::ConstIterator it = text_list.constBegin();
    const QMap<QString, bool>::ConstIterator itEnd = text_list.constEnd();
    while (it != itEnd) {
        const QModelIndex text_idx = index(cnt++, 0);
        setData(text_idx, it.key(), Qt::DisplayRole);
        if (it.value()) {
            setData(text_idx, fontVariant, Qt::FontRole);
            setData(text_idx, QColor(Qt::red), Qt::ForegroundRole);
        }
        ++it;
    }
}

Qt::ItemFlags InlineEditorModel::flags(const QModelIndex &index) const
{
    if (isTitle(index.row()))
        return Qt::ItemIsEnabled;
    else
        return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
}

int InlineEditorModel::findText(const QString &text) const
{
    const int cnt = rowCount();
    for (int i = 0; i < cnt; ++i) {
        const QModelIndex idx = index(i, 0);
        if (data(idx, Qt::UserRole).toInt() == TitleItem)
            continue;
        if (data(idx, Qt::DisplayRole).toString() == text)
            return i;
    }
    return -1;
}

// ------------  InlineEditor
class InlineEditor : public QComboBox
{
    Q_OBJECT
    Q_PROPERTY(QString text READ text WRITE setText USER true)
public:
    InlineEditor(QWidget *parent = 0);

    QString text() const;
    void setText(const QString &text);

    void addTitle(const QString &title);
    void addText(const QString &text);
    void addTextList(const QMap<QString, bool> &text_list);

private slots:
    void checkSelection(int idx);

private:
    InlineEditorModel *m_model;
    int m_idx;
};

InlineEditor::InlineEditor(QWidget *parent) :
    QComboBox(parent),
    m_idx(-1)
{
    setModel(m_model = new InlineEditorModel(0, 4, this));
    setFrame(false);
    m_idx = -1;
    connect(this, SIGNAL(activated(int)), this, SLOT(checkSelection(int)));
}

void InlineEditor::checkSelection(int idx)
{
    if (idx == m_idx)
        return;

   if (m_model->isTitle(idx))
        setCurrentIndex(m_idx);
    else
        m_idx = idx;
}

void InlineEditor::addTitle(const QString &title)
{
    m_model->addTitle(title);
}

void InlineEditor::addTextList(const QMap<QString, bool> &text_list)
{
    m_model->addTextList(text_list);
}

void InlineEditor::addText(const QString &text)
{
    m_model->addText(text);
}

QString InlineEditor::text() const
{
    return currentText();
}

void InlineEditor::setText(const QString &text)
{
    m_idx = m_model->findText(text);
    if (m_idx == -1)
        m_idx = 0;
    setCurrentIndex(m_idx);
}

// ------------------ ConnectionDelegate

class ConnectionDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    ConnectionDelegate(QWidget *parent = 0);

    void setForm(QDesignerFormWindowInterface *form);

    virtual QWidget *createEditor(QWidget *parent,
                                    const QStyleOptionViewItem &option,
                                    const QModelIndex &index) const;

private slots:
    void emitCommitData();

private:
    QDesignerFormWindowInterface *m_form;
};

ConnectionDelegate::ConnectionDelegate(QWidget *parent)
    : QItemDelegate(parent)
{
    m_form = 0;

    static QItemEditorFactory *factory = 0;
    if (factory == 0) {
        factory = new QItemEditorFactory;
        QItemEditorCreatorBase *creator
            = new QItemEditorCreator<InlineEditor>("text");
        factory->registerEditor(QVariant::String, creator);
    }

    setItemEditorFactory(factory);
}

void ConnectionDelegate::setForm(QDesignerFormWindowInterface *form)
{
    m_form = form;
}

QWidget *ConnectionDelegate::createEditor(QWidget *parent,
                                                const QStyleOptionViewItem &option,
                                                const QModelIndex &index) const
{
    if (m_form == 0)
        return 0;

    QWidget *w = QItemDelegate::createEditor(parent, option, index);
    InlineEditor *inline_editor = qobject_cast<InlineEditor*>(w);
    Q_ASSERT(inline_editor != 0);
    const QAbstractItemModel *model = index.model();

    const QModelIndex obj_name_idx = model->index(index.row(), index.column() <= 1 ? 0 : 2);
    const QString obj_name = model->data(obj_name_idx, Qt::DisplayRole).toString();

    switch (index.column()) {
    case 0:
    case 2:  { // object names
        QStringList obj_name_list = objectNameList(m_form);
        QMap<QString, bool> markedNameList;
        markedNameList.insert(tr("<object>"), false);
        inline_editor->addTextList(markedNameList);
        markedNameList.clear();
        foreach (const QString &name, obj_name_list)
            markedNameList.insert(name, false);
        inline_editor->addTextList(markedNameList);
    }
        break;
    case 1:
    case 3: { // signals, slots
        const qdesigner_internal::MemberType type = index.column() == 1 ? qdesigner_internal::SignalMember : qdesigner_internal::SlotMember;
        const QModelIndex peer_index = model->index(index.row(), type == qdesigner_internal::SignalMember ? 3 : 1);
        const QString peer = model->data(peer_index, Qt::DisplayRole).toString();

        const qdesigner_internal::ClassesMemberFunctions class_list = qdesigner_internal::reverseClassesMemberFunctions(obj_name, type, peer, m_form);

        inline_editor->addText(type == qdesigner_internal::SignalMember ? tr("<signal>") : tr("<slot>"));
        foreach (const qdesigner_internal::ClassMemberFunctions &classInfo, class_list) {
            if (classInfo.m_className.isEmpty() || classInfo.m_memberList.isEmpty())
                continue;
            // Mark deprecated members by passing bool=true.
            QMap<QString, bool> markedMemberList;
            foreach (const QString &member, classInfo.m_memberList)
                markedMemberList.insert(member, false);
            inline_editor->addTitle(classInfo.m_className);
            inline_editor->addTextList(markedMemberList);
        }
    }
        break;
    default:
        break;
    }

    connect(inline_editor, SIGNAL(activated(int)), this, SLOT(emitCommitData()));

    return inline_editor;
}

void ConnectionDelegate::emitCommitData()
{
    InlineEditor *editor = qobject_cast<InlineEditor*>(sender());
    emit commitData(editor);
}

}

namespace qdesigner_internal {

/*******************************************************************************
** SignalSlotEditorWindow
*/

SignalSlotEditorWindow::SignalSlotEditorWindow(QDesignerFormEditorInterface *core,
                                                QWidget *parent)  :
    QWidget(parent),
    m_view(new QTreeView),
    m_editor(0),
    m_add_button(new QToolButton),
    m_remove_button(new QToolButton),
    m_core(core),
    m_model(new ConnectionModel(this)),
    m_proxy_model(new QSortFilterProxyModel(this)),
    m_handling_selection_change(false)
{
    m_proxy_model->setSourceModel(m_model);
    m_view->setModel(m_proxy_model);
    m_view->setSortingEnabled(true);
    m_view->setItemDelegate(new ConnectionDelegate(this));
    m_view->setEditTriggers(QAbstractItemView::DoubleClicked
                                | QAbstractItemView::EditKeyPressed);
    m_view->setRootIsDecorated(false);
    m_view->setTextElideMode (Qt::ElideMiddle);
    connect(m_view->selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)), this, SLOT(updateUi()));
    connect(m_view->header(), SIGNAL(sectionDoubleClicked(int)), m_view, SLOT(resizeColumnToContents(int)));

    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->setMargin(0);
    layout->setSpacing(0);

    QToolBar *toolBar = new QToolBar;
    toolBar->setIconSize(QSize(22, 22));
    m_add_button->setIcon(createIconSet(QStringLiteral("plus.png")));
    connect(m_add_button, SIGNAL(clicked()), this, SLOT(addConnection()));
    toolBar->addWidget(m_add_button);

    m_remove_button->setIcon(createIconSet(QStringLiteral("minus.png")));
    connect(m_remove_button, SIGNAL(clicked()), this, SLOT(removeConnection()));
    toolBar->addWidget(m_remove_button);

    layout->addWidget(toolBar);
    layout->addWidget(m_view);

    connect(core->formWindowManager(),
            SIGNAL(activeFormWindowChanged(QDesignerFormWindowInterface*)),
                this, SLOT(setActiveFormWindow(QDesignerFormWindowInterface*)));

    updateUi();
}

void SignalSlotEditorWindow::setActiveFormWindow(QDesignerFormWindowInterface *form)
{
    QDesignerIntegrationInterface *integration = m_core->integration();

    if (!m_editor.isNull()) {
        disconnect(m_view->selectionModel(),
                    SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                    this, SLOT(updateEditorSelection(QModelIndex)));
        disconnect(m_editor, SIGNAL(connectionSelected(Connection*)),
                    this, SLOT(updateDialogSelection(Connection*)));
        if (integration) {
            disconnect(integration, SIGNAL(objectNameChanged(QDesignerFormWindowInterface*,QObject*,QString,QString)),
                    this, SLOT(objectNameChanged(QDesignerFormWindowInterface*,QObject*,QString,QString)));
        }
    }

    m_editor = form->findChild<SignalSlotEditor*>();
    m_model->setEditor(m_editor);
    if (!m_editor.isNull()) {
        ConnectionDelegate *delegate
            = qobject_cast<ConnectionDelegate*>(m_view->itemDelegate());
        if (delegate != 0)
            delegate->setForm(form);

        connect(m_view->selectionModel(),
                SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                this, SLOT(updateEditorSelection(QModelIndex)));
        connect(m_editor, SIGNAL(connectionSelected(Connection*)),
                this, SLOT(updateDialogSelection(Connection*)));
        if (integration) {
            connect(integration, SIGNAL(objectNameChanged(QDesignerFormWindowInterface*,QObject*,QString,QString)),
                    this, SLOT(objectNameChanged(QDesignerFormWindowInterface*,QObject*,QString,QString)));
        }
    }

    updateUi();
}

void SignalSlotEditorWindow::updateDialogSelection(Connection *con)
{
    if (m_handling_selection_change || m_editor == 0)
        return;

    QModelIndex index = m_proxy_model->mapFromSource(m_model->connectionToIndex(con));
    if (index == m_view->currentIndex())
        return;
    m_handling_selection_change = true;
    m_view->setCurrentIndex(index);
    m_handling_selection_change = false;

    updateUi();
}

void SignalSlotEditorWindow::updateEditorSelection(const QModelIndex &index)
{
    if (m_handling_selection_change || m_editor == 0)
        return;

    if (m_editor == 0)
        return;

    Connection *con = m_model->indexToConnection(m_proxy_model->mapToSource(index));
    if (m_editor->selected(con))
        return;
    m_handling_selection_change = true;
    m_editor->selectNone();
    m_editor->setSelected(con, true);
    m_handling_selection_change = false;

    updateUi();
}

void SignalSlotEditorWindow::objectNameChanged(QDesignerFormWindowInterface *, QObject *, const QString &, const QString &)
{
    if (m_editor)
        m_model->updateAll();
}

void SignalSlotEditorWindow::addConnection()
{
    if (m_editor.isNull())
        return;

    m_editor->addEmptyConnection();
    updateUi();
}

void SignalSlotEditorWindow::removeConnection()
{
    if (m_editor.isNull())
        return;

    m_editor->deleteSelected();
    updateUi();
}

void SignalSlotEditorWindow::updateUi()
{
    m_add_button->setEnabled(!m_editor.isNull());
    m_remove_button->setEnabled(!m_editor.isNull() && m_view->currentIndex().isValid());
}

} // namespace qdesigner_internal

QT_END_NAMESPACE

#include "signalsloteditorwindow.moc"
