File indexing completed on 2024-05-19 12:54:55

 /* This file is part of the KDE project
    Copyright (C) 2011-2016 Jarosław Staniek <staniek@kde.org>
    Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library 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
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
 */
 
 #include "KexiSearchLineEdit.h"
 #include <KexiSearchableModel.h>
 
 #include <KLocalizedString>
 #include <KActionCollection>
 
 #include <kexiutils/completer/KexiCompleter.h>
 #include <kexiutils/KexiTester.h>
 #include <KexiMainWindowIface.h>
 
 #include <QDebug>
 #include <QShortcut>
 #include <QKeySequence>
 #include <QTreeView>
 #include <QAbstractProxyModel>
 #include <QInputMethodEvent>
 #include <QStyledItemDelegate>
 #include <QTextLayout>
 #include <QPainter>
 #include <QFontMetrics>
 
 class SearchableObject
 {
 public:
     KexiSearchableModel *model;
     int index;
 };
 
 class KexiSearchLineEditCompleterPopupModel : public QAbstractListModel
 {
     Q_OBJECT
 public:
     explicit KexiSearchLineEditCompleterPopupModel(QObject *parent = 0);
     ~KexiSearchLineEditCompleterPopupModel();
     virtual int rowCount(const QModelIndex &parent = QModelIndex()) const override;
     virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
     virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
 
 public Q_SLOTS:
     //! Adds a new model or updates information (model items) about existing one
     void addSearchableModel(KexiSearchableModel *model);
 
     //! Removes existing model
     void removeSearchableModel(KexiSearchableModel *model);
 
 private:
     class Private;
     Private * const d;
 };
 
 class Q_DECL_HIDDEN KexiSearchLineEditCompleterPopupModel::Private
 {
 public:
     Private()
      : cachedCount(-1)
     {
     }
     ~Private() {
         qDeleteAll(searchableObjects);
     }
     void removeSearchableModel(KexiSearchableModel *model) {
         if (searchableModels.removeAll(model) == 0) {
             return;
         }
         QMutableMapIterator<int, SearchableObject *> it(searchableObjects);
         while (it.hasNext()) {
             it.next();
             if (it.value()->model == model) {
                 it.remove();
             }
         }
     }
     void updateCachedCount() {
         cachedCount = 0;
         foreach (KexiSearchableModel* searchableModel, searchableModels) {
             cachedCount += searchableModel->searchableObjectCount();
         }
     }
     int cachedCount;
     QList<KexiSearchableModel*> searchableModels;
     QMap<int, SearchableObject*> searchableObjects;
 };
 
 KexiSearchLineEditCompleterPopupModel::KexiSearchLineEditCompleterPopupModel(QObject *parent)
  : QAbstractListModel(parent), d(new Private)
 {
 }
 
 KexiSearchLineEditCompleterPopupModel::~KexiSearchLineEditCompleterPopupModel()
 {
     delete d;
 }
 
 int KexiSearchLineEditCompleterPopupModel::rowCount(const QModelIndex &parent) const
 {
     Q_UNUSED(parent);
     if (d->cachedCount < 0) {
         d->updateCachedCount();
     }
     return d->cachedCount;
 }
 
 QVariant KexiSearchLineEditCompleterPopupModel::data(const QModelIndex &index, int role) const
 {
     const int row = index.row();
     if (d->cachedCount <= row) {
         return QVariant();
     }
     SearchableObject *object = static_cast<SearchableObject*>(index.internalPointer());
     QModelIndex sourceIndex = object->model->sourceIndexForSearchableObject(object->index);
     return object->model->searchableData(sourceIndex, role);
 }
 
 QModelIndex KexiSearchLineEditCompleterPopupModel::index(int row, int column,
                                                          const QModelIndex &parent) const
 {
     //qDebug() << row;
     if (!hasIndex(row, column, parent)) {
         qDebug() << "!hasIndex";
         return QModelIndex();
     }
 
     int r = row;
     SearchableObject *sobject = d->searchableObjects.value(row);
     if (!sobject) {
         foreach (KexiSearchableModel* searchableModel, d->searchableModels) {
             const int count = searchableModel->searchableObjectCount();
             if (r < count) {
                 sobject = new SearchableObject;
                 sobject->model = searchableModel;
                 sobject->index = r;
                 d->searchableObjects.insert(row, sobject);
                 break;
             }
             else {
                 r -= count;
             }
         }
     }
     if (!sobject) {
         return QModelIndex();
     }
     return createIndex(row, column, sobject);
 }
 
 void KexiSearchLineEditCompleterPopupModel::addSearchableModel(KexiSearchableModel *model)
 {
     if (!model) {
         return;
     }
     beginResetModel();
     d->removeSearchableModel(model);
     d->searchableModels.append(model);
     connect(model->deleteNotifier(), &KexiSearchableModelDeleteNotifier::aboutToDelete, this,
             &KexiSearchLineEditCompleterPopupModel::removeSearchableModel, Qt::UniqueConnection);
     d->updateCachedCount();
     endResetModel();
 }
 
 void KexiSearchLineEditCompleterPopupModel::removeSearchableModel(KexiSearchableModel *model)
 {
     if (!model || !d->searchableModels.contains(model)) {
         return;
     }
     beginResetModel();
     d->removeSearchableModel(model);
     d->updateCachedCount();
     endResetModel();
 }
 
 // ----
 
 class KexiSearchLineEditCompleter : public KexiCompleter
 {
     Q_OBJECT
 public:
     explicit KexiSearchLineEditCompleter(QObject *parent = 0) : KexiCompleter(parent) {
         setCompletionRole(Qt::DisplayRole);
     }
 
     virtual QString pathFromIndex(const QModelIndex &index) const override {
         if (!index.isValid())
             return QString();
         SearchableObject *object = static_cast<SearchableObject*>(index.internalPointer());
         QModelIndex sourceIndex = object->model->sourceIndexForSearchableObject(object->index);
         return object->model->pathFromIndex(sourceIndex);
     }
 };
 
 // ----
 
 class KexiSearchLineEditPopupItemDelegate;
 
 class Q_DECL_HIDDEN KexiSearchLineEdit::Private
 {
 public:
     explicit Private(KexiSearchLineEdit *_q)
      : q(_q), clearShortcut(QKeySequence(Qt::Key_Escape), _q),
        recentlyHighlightedModel(0)
     {
         // make Escape key clear the search box
         QObject::connect(&clearShortcut, SIGNAL(activated()),
                          q, SLOT(slotClearShortcutActivated()));
     }
 
     void highlightSearchableObject(const QPair<QModelIndex, KexiSearchableModel*> &source)
     {
         source.second->highlightSearchableObject(source.first);
         recentlyHighlightedModel = source.second;
     }
 
     void removeHighlightingForSearchableObject()
     {
         if (recentlyHighlightedModel) {
             recentlyHighlightedModel->highlightSearchableObject(QModelIndex());
             recentlyHighlightedModel = 0;
         }
     }
 
     KexiSearchLineEditCompleter *completer;
     QTreeView *popupTreeView;
     KexiSearchLineEditCompleterPopupModel *model;
     KexiSearchLineEditPopupItemDelegate *delegate;
     QPointer<QWidget> previouslyFocusedWidget;
 
 private:
     KexiSearchLineEdit *q;
     QShortcut clearShortcut;
     KexiSearchableModel *recentlyHighlightedModel;
 };
 
 // ----
 
 static QSizeF viewItemTextLayout(QTextLayout &textLayout, int lineWidth)
 {
     qreal height = 0;
     qreal widthUsed = 0;
     textLayout.beginLayout();
     while (true) {
         QTextLine line = textLayout.createLine();
         if (!line.isValid())
             break;
         line.setLineWidth(lineWidth);
         line.setPosition(QPointF(0, height));
         height += line.height();
         widthUsed = qMax(widthUsed, line.naturalTextWidth());
     }
     textLayout.endLayout();
     return QSizeF(widthUsed, height);
 }
 
 class KexiSearchLineEditPopupItemDelegate : public QStyledItemDelegate
 {
     Q_OBJECT
 public:
     KexiSearchLineEditPopupItemDelegate(QObject *parent, KexiCompleter *completer)
      : QStyledItemDelegate(parent), highlightMatchingSubstrings(true), m_completer(completer)
     {
     }
 
     //! Implemented to improve width hint
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override
     {
         QSize size(QStyledItemDelegate::sizeHint(option, index));
         QStyleOptionViewItem v4 = option;
         QStyledItemDelegate::initStyleOption(&v4, index);
         const QSize s = v4.widget->style()->sizeFromContents(QStyle::CT_ItemViewItem, &v4, size, v4.widget);
         size.setWidth(s.width());
         return size;
     }
 
     virtual void paint(QPainter *painter, const QStyleOptionViewItem &option,
                        const QModelIndex &index) const override
     {
         QStyledItemDelegate::paint(painter, option, index);
         QStyleOptionViewItem v4 = option;
         QStyledItemDelegate::initStyleOption(&v4, index);
         // like in QCommonStyle::paint():
         if (!v4.text.isEmpty()) {
             painter->save();
             painter->setClipRect(v4.rect);
             QPalette::ColorGroup cg = (v4.state & QStyle::State_Enabled)
                                     ? QPalette::Normal : QPalette::Disabled;
             if (cg == QPalette::Normal && !(v4.state & QStyle::State_Active)) {
                 cg = QPalette::Inactive;
             }
             if (v4.state & QStyle::State_Selected) {
                 painter->setPen(v4.palette.color(cg, QPalette::HighlightedText));
             }
             else {
                 painter->setPen(v4.palette.color(cg, QPalette::Text));
             }
             QRect textRect = v4.widget->style()->subElementRect(QStyle::SE_ItemViewItemText,
                                                                 &v4, v4.widget);
             viewItemDrawText(painter, &v4, textRect);
             painter->restore();
         }
     }
     bool highlightMatchingSubstrings;
 
 protected:
     // bits from qcommonstyle.cpp
     void viewItemDrawText(QPainter *p, const QStyleOptionViewItem *option, const QRect &rect) const
     {
         const QWidget *widget = option->widget;
         const int textMargin = widget->style()->pixelMetric(QStyle::PM_FocusFrameHMargin, 0, widget) + 1;
 
         QRect textRect = rect.adjusted(textMargin, 0, -textMargin, 0); // remove width padding
         const bool wrapText = option->features & QStyleOptionViewItem::WrapText;
         QTextOption textOption;
         textOption.setWrapMode(wrapText ? QTextOption::WordWrap : QTextOption::ManualWrap);
         textOption.setTextDirection(option->direction);
         textOption.setAlignment(QStyle::visualAlignment(option->direction, option->displayAlignment));
         QTextLayout textLayout;
         textLayout.setTextOption(textOption);
         textLayout.setFont(option->font);
         QString text = option->text;
         textLayout.setText(text);
 
         if (highlightMatchingSubstrings) {
             QList<QTextLayout::FormatRange> formats;
             QString substring = m_completer->completionPrefix();
             QColor underLineColor(p->pen().color());
             underLineColor.setAlpha(128);
             QTextLayout::FormatRange formatRange;
             formatRange.format.setFontUnderline(true);
             formatRange.format.setUnderlineColor(underLineColor);
 
             for (int i = 0; i < text.length();) {
                 i = text.indexOf(substring, i, Qt::CaseInsensitive);
                 if (i == -1)
                     break;
                 formatRange.length = substring.length();
                 formatRange.start = i;
                 formats.append(formatRange);
                 i += formatRange.length;
             }
             textLayout.setAdditionalFormats(formats);
         }
         viewItemTextLayout(textLayout, textRect.width());
 
         const int lineCount = textLayout.lineCount();
         QPointF position = textRect.topLeft();
         for (int i = 0; i < lineCount; ++i) {
             const QTextLine line = textLayout.lineAt(i);
             const QPointF adjustPos(0, qreal(textRect.height() - line.rect().height()) / 2.0);
             line.draw(p, position + adjustPos);
             position.setY(position.y() + line.y() + line.ascent());
         }
     }
 
     virtual void initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const override
     {
         QStyledItemDelegate::initStyleOption(option, index);
         QStyleOptionViewItem *v4 = qstyleoption_cast<QStyleOptionViewItem*>(option);
         if (v4) {
             v4->text.clear();
         }
     }
     KexiCompleter *m_completer;
 };
 
 // ----
 
 //! @internal Style-dependent fixes for the left margin, probably needed because of the limited
 //! width of the line edit - it's placed in tab bar's corner widget.
 static void fixLeftMargin(QLineEdit *lineEdit)
 {
     int add = 0;
     const QByteArray st(lineEdit->style()->objectName().toLatin1());
     if (st == "breeze" || st == "gtk+") {
         add = 4; // like QLineEditIconButton::IconMargin
     }
     else if (st == "fusion") {
         add = 2;
     }
     if (add != 0) {
         QMargins margins(lineEdit->textMargins());
         margins.setLeft(margins.left() + add);
         lineEdit->setTextMargins(margins);
     }
 }
 
 // ----
 
 KexiSearchLineEdit::KexiSearchLineEdit(QWidget *parent)
  : QLineEdit(parent), d(new Private(this))
 {
     d->completer = new KexiSearchLineEditCompleter(this);
     d->popupTreeView = new QTreeView;
     kexiTester() << KexiTestObject(d->popupTreeView, "globalSearch.treeView");
 
     d->completer->setPopup(d->popupTreeView);
     d->completer->setModel(d->model = new KexiSearchLineEditCompleterPopupModel(d->completer));
     d->completer->setCaseSensitivity(Qt::CaseInsensitive);
     d->completer->setSubstringCompletion(true);
     d->completer->setMaxVisibleItems(12);
     // Use unsorted model, sorting is handled in the source model itself.
     // Moreover, sorting KexiCompleter::CaseInsensitivelySortedModel breaks
     // filtering so only table names are displayed.
     d->completer->setModelSorting(KexiCompleter::UnsortedModel);
 
     d->popupTreeView->setHeaderHidden(true);
     d->popupTreeView->setRootIsDecorated(false);
     d->popupTreeView->setItemDelegate(
         d->delegate = new KexiSearchLineEditPopupItemDelegate(d->popupTreeView, d->completer));
 
     // forked initialization like in QLineEdit::setCompleter:
     d->completer->setWidget(this);
     if (hasFocus()) {
         connectCompleter();
     }
 
     setFocusPolicy(Qt::NoFocus); // We cannot focus set any policy here.
                                  // Qt::ClickFocus would make it impossible to find
                                  // previously focus widget in KexiSearchLineEdit::setFocus().
                                  // We need this information to focus back when pressing Escape key.
     setClearButtonEnabled(true);
     QAction *action_tools_locate = KexiMainWindowIface::global()->actionCollection()->action("tools_locate");
     setPlaceholderText(xi18nc("Tools->Locate textbox' placeholder text with shortcut", "Locate (%1)",
                        action_tools_locate->shortcut().toString(QKeySequence::NativeText)));
     fixLeftMargin(this);
     setMinimumWidth(fontMetrics().width("  " + placeholderText() + "    " + "    " + "      "));
 }
 
 KexiSearchLineEdit::~KexiSearchLineEdit()
 {
     delete d;
 }
 
 void KexiSearchLineEdit::connectCompleter()
 {
     connect(d->completer, SIGNAL(activated(QString)),
             this, SLOT(setText(QString)));
     connect(d->completer, SIGNAL(activated(QModelIndex)),
             this, SLOT(slotCompletionActivated(QModelIndex)));
     connect(d->completer, SIGNAL(highlighted(QString)),
             this, SLOT(slotCompletionHighlighted(QString)));
     connect(d->completer, SIGNAL(highlighted(QModelIndex)),
             this, SLOT(slotCompletionHighlighted(QModelIndex)));
 }
 
 void KexiSearchLineEdit::disconnectCompleter()
 {
     disconnect(d->completer, 0, this, 0);
 }
 
 void KexiSearchLineEdit::slotClearShortcutActivated()
 {
     //qDebug() << (QWidget*)d->previouslyFocusedWidget << text();
     d->removeHighlightingForSearchableObject();
     if (text().isEmpty() && d->previouslyFocusedWidget) {
         // after second Escape, go back to previously focused widget
         d->previouslyFocusedWidget->setFocus();
         d->previouslyFocusedWidget = 0;
     }
     else {
         clear();
     }
 }
 
 void KexiSearchLineEdit::addSearchableModel(KexiSearchableModel *model)
 {
     d->model->addSearchableModel(model);
 }
 
 void KexiSearchLineEdit::removeSearchableModel(KexiSearchableModel *model)
 {
     d->model->removeSearchableModel(model);
 }
 
 QPair<QModelIndex, KexiSearchableModel*> KexiSearchLineEdit::mapCompletionIndexToSource(const QModelIndex &index) const
 {
     QModelIndex realIndex
         = qobject_cast<QAbstractProxyModel*>(d->completer->completionModel())->mapToSource(index);
     if (!realIndex.isValid()) {
         return qMakePair(QModelIndex(), static_cast<KexiSearchableModel*>(0));
     }
     SearchableObject *object = static_cast<SearchableObject*>(realIndex.internalPointer());
     if (!object) {
         return qMakePair(QModelIndex(), static_cast<KexiSearchableModel*>(0));
     }
     return qMakePair(object->model->sourceIndexForSearchableObject(object->index), object->model);
 }
 
 void KexiSearchLineEdit::slotCompletionHighlighted(const QString &newText)
 {
     if (d->completer->completionMode() != KexiCompleter::InlineCompletion) {
         setText(newText);
     }
     else {
         int p = cursorPosition();
         QString t = text();
         setText(t.left(p) + newText.mid(p));
         end(false);
         cursorBackward(text().length() - p, true);
     }
 }
 
 void KexiSearchLineEdit::slotCompletionHighlighted(const QModelIndex &index)
 {
     QPair<QModelIndex, KexiSearchableModel*> source = mapCompletionIndexToSource(index);
     if (!source.first.isValid())
         return;
     //qDebug() << source.second->searchableData(source.first, Qt::EditRole);
     d->highlightSearchableObject(source);
 }
 
 void KexiSearchLineEdit::slotCompletionActivated(const QModelIndex &index)
 {
     QPair<QModelIndex, KexiSearchableModel*> source = mapCompletionIndexToSource(index);
     if (!source.first.isValid())
         return;
     //qDebug() << source.second->searchableData(source.first, Qt::EditRole);
 
     d->highlightSearchableObject(source);
     d->removeHighlightingForSearchableObject();
     if (source.second->activateSearchableObject(source.first)) {
         clear();
     }
 }
 
 // forked bits from QLineEdit::inputMethodEvent()
 void KexiSearchLineEdit::inputMethodEvent(QInputMethodEvent *e)
 {
     QLineEdit::inputMethodEvent(e);
     if (isReadOnly() || !e->isAccepted())
         return;
     if (!e->commitString().isEmpty()) {
         complete(Qt::Key_unknown);
     }
 }
 
 void KexiSearchLineEdit::setFocus()
 {
     //qDebug() << "d->previouslyFocusedWidget:" << (QWidget*)d->previouslyFocusedWidget
     //         << "window()->focusWidget():" << window()->focusWidget();
     if (!d->previouslyFocusedWidget && window()->focusWidget() != this) {
         d->previouslyFocusedWidget = window()->focusWidget();
     }
     QLineEdit::setFocus();
 }
 
 // forked bits from QLineEdit::focusInEvent()
 void KexiSearchLineEdit::focusInEvent(QFocusEvent *e)
 {
     //qDebug() << "d->previouslyFocusedWidget:" << (QWidget*)d->previouslyFocusedWidget
     //         << "window()->focusWidget():" << window()->focusWidget();
     if (!d->previouslyFocusedWidget && window()->focusWidget() != this) {
         d->previouslyFocusedWidget = window()->focusWidget();
     }
     QLineEdit::focusInEvent(e);
     d->completer->setWidget(this);
     connectCompleter();
     update();
 }
 
 // forked bits from QLineEdit::focusOutEvent()
 void KexiSearchLineEdit::focusOutEvent(QFocusEvent *e)
 {
     QLineEdit::focusOutEvent(e);
     disconnectCompleter();
     update();
     if (e->reason() == Qt::TabFocusReason || e->reason() == Qt::BacktabFocusReason) {
         // go back to previously focused widget
         if (d->previouslyFocusedWidget) {
             d->previouslyFocusedWidget->setFocus();
         }
         e->accept();
     }
     d->previouslyFocusedWidget = 0;
     d->removeHighlightingForSearchableObject();
 }
 
 // forked bits from QLineControl::processKeyEvent()
 void KexiSearchLineEdit::keyPressEvent(QKeyEvent *event)
 {
     bool inlineCompletionAccepted = false;
 
     //qDebug() << event->key() << (QWidget*)d->previouslyFocusedWidget;
 
     KexiCompleter::CompletionMode completionMode = d->completer->completionMode();
     if ((completionMode == KexiCompleter::PopupCompletion
             || completionMode == KexiCompleter::UnfilteredPopupCompletion)
         && d->completer->popup()
         && d->completer->popup()->isVisible()) {
         // The following keys are forwarded by the completer to the widget
         // Ignoring the events lets the completer provide suitable default behavior
         switch (event->key()) {
         case Qt::Key_Escape:
             event->ignore();
             return;
 #ifdef QT_KEYPAD_NAVIGATION
         case Qt::Key_Select:
             if (!QApplication::keypadNavigationEnabled())
                 break;
             d->completer->popup()->hide(); // just hide. will end up propagating to parent
 #endif
         default:
             break; // normal key processing
         }
     } else if (completionMode == KexiCompleter::InlineCompletion) {
         switch (event->key()) {
         case Qt::Key_Enter:
         case Qt::Key_Return:
         case Qt::Key_F4:
 #ifdef QT_KEYPAD_NAVIGATION
         case Qt::Key_Select:
             if (!QApplication::keypadNavigationEnabled())
                 break;
 #endif
             if (!d->completer->currentCompletion().isEmpty() && hasSelectedText()
                 && textAfterSelection().isEmpty())
             {
                 setText(d->completer->currentCompletion());
                 inlineCompletionAccepted = true;
             }
         default:
             break; // normal key processing
         }
     }
 
     if (d->completer->popup() && !d->completer->popup()->isVisible()
         && (event->key() == Qt::Key_F4 || event->key() == Qt::Key_Down))
     {
         // go back to completing when popup is closed and F4/Down pressed
         d->completer->complete();
     }
     else if (d->completer->popup() && d->completer->popup()->isVisible()
         && event->key() == Qt::Key_F4)
     {
         // hide popup if F4 pressed
         d->completer->popup()->hide();
     }
 
     if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {
         if (d->completer->popup() && !d->completer->popup()->isVisible()) {
             d->completer->setCompletionPrefix(text());
         }
         if (d->completer->completionCount() == 1) {
             // single item on the completion list, select it automatically
             d->completer->setCurrentRow(0);
             slotCompletionActivated(d->completer->currentIndex());
             event->accept();
             if (d->completer->popup()) {
                 d->completer->popup()->hide();
             }
             return;
         }
         //qDebug() << "currentRow:" << d->completer->currentRow();
         //qDebug() << "currentIndex:" << d->completer->currentIndex().isValid();
         //qDebug() << "currentCompletion:" << d->completer->currentCompletion();
         if (d->completer->popup() && d->completer->completionCount() > 1) {
             //qDebug() << "11111" << d->completer->completionPrefix()
             //          << d->completer->completionCount();
 
             // more than one item on completion list, find exact match, if found, accept
             for (int i = 0; i < d->completer->completionCount(); i++) {
                 //qDebug() << d->completer->completionModel()->index(i, 0, QModelIndex()).data(Qt::EditRole).toString();
                 if (d->completer->completionPrefix()
                     == d->completer->completionModel()->index(i, 0, QModelIndex()).data(Qt::EditRole).toString())
                 {
                     d->completer->setCurrentRow(i);
                     slotCompletionActivated(d->completer->currentIndex());
                     event->accept();
                     d->completer->popup()->hide();
                     return;
                 }
             }
             // exactly matching item not found
             bool selectedItem = !d->completer->popup()->selectionModel()->selectedIndexes().isEmpty();
             if (!selectedItem || !d->completer->popup()->isVisible()) {
                 if (!d->completer->popup()->isVisible()) {
                     // there is no matching text, go back to completing
                     d->completer->complete();
                 }
                 // do not hide
                 event->accept();
                 return;
             }
         }
         // applying completion since there is item selected
         d->completer->popup()->hide();
         connectCompleter();
         QLineEdit::keyPressEvent(event); /* executes this:
                                             if (hasAcceptableInput() || fixup()) {
                                                 emit returnPressed();
                                                 emit editingFinished();
                                             } */
         if (inlineCompletionAccepted)
             event->accept();
         else
             event->ignore();
         return;
     }
 
     if (event == QKeySequence::MoveToNextChar) {
 #if defined(Q_OS_WIN)
         if (hasSelectedText()
             && d->completer->completionMode() == KexiCompleter::InlineCompletion)
         {
             int selEnd = selectionEnd();
             if (selEnd >= 0) {
                 setCursorPosition(selEnd);
             }
             event->accept();
             return;
         }
 #endif
     }
     else if (event == QKeySequence::MoveToPreviousChar) {
 #if defined(Q_OS_WIN)
         if (hasSelectedText()
             && d->completer->completionMode() == KexiCompleter::InlineCompletion)
         {
             int selStart = selectionStart();
             if (selStart >= 0) {
                 setCursorPosition(selStart);
             }
             event->accept();
             return;
         }
 #endif
     }
     else {
         if (event->modifiers() & Qt::ControlModifier) {
             switch (event->key()) {
             case Qt::Key_Up:
             case Qt::Key_Down:
                 complete(event->key());
                 return;
             default:;
             }
         } else { // ### check for *no* modifier
             switch (event->key()) {
             case Qt::Key_Backspace:
                 if (!isReadOnly()) {
                     backspace();
                     complete(Qt::Key_Backspace);
                     return;
                 }
                 break;
             case Qt::Key_Delete:
                 if (!isReadOnly()) {
                     QLineEdit::keyPressEvent(event);
                     complete(Qt::Key_Delete);
                     return;
                 }
                 break;
             default:;
             }
         }
     }
 
     if (!isReadOnly()) {
         QString t = event->text();
         if (!t.isEmpty() && t.at(0).isPrint()) {
             QLineEdit::keyPressEvent(event);
             complete(event->key());
             return;
         }
     }
 
     QLineEdit::keyPressEvent(event);
 }
 
 void KexiSearchLineEdit::changeEvent(QEvent *event)
 {
     QLineEdit::changeEvent(event);
     if (event->type() == QEvent::StyleChange) {
         fixLeftMargin(this);
     }
 }
 
 // forked bits from QLineControl::advanceToEnabledItem()
 // iterating forward(dir=1)/backward(dir=-1) from the
 // current row based. dir=0 indicates a new completion prefix was set.
 bool KexiSearchLineEdit::advanceToEnabledItem(int dir)
 {
     int start = d->completer->currentRow();
     if (start == -1)
         return false;
     int i = start + dir;
     if (dir == 0)
         dir = 1;
     do {
         if (!d->completer->setCurrentRow(i)) {
             if (!d->completer->wrapAround())
                 break;
             i = i > 0 ? 0 : d->completer->completionCount() - 1;
         } else {
             QModelIndex currentIndex = d->completer->currentIndex();
             if (d->completer->completionModel()->flags(currentIndex) & Qt::ItemIsEnabled)
                 return true;
             i += dir;
         }
     } while (i != start);
 
     d->completer->setCurrentRow(start); // restore
     return false;
 }
 
 QString KexiSearchLineEdit::textBeforeSelection() const
 {
     return hasSelectedText() ? text().left(selectionStart()) : QString();
 }
 
 QString KexiSearchLineEdit::textAfterSelection() const
 {
     return hasSelectedText() ? text().mid(selectionEnd()) : QString();
 }
 
 int KexiSearchLineEdit::selectionEnd() const
 {
     return hasSelectedText() ?
         (selectionStart() + selectedText().length()) : -1;
 }
 
 // forked bits from QLineControl::complete()
 void KexiSearchLineEdit::complete(int key)
 {
     if (isReadOnly() || echoMode() != QLineEdit::Normal)
         return;
 
     QString text = this->text();
     if (d->completer->completionMode() == KexiCompleter::InlineCompletion) {
         if (key == Qt::Key_Backspace)
             return;
         int n = 0;
         if (key == Qt::Key_Up || key == Qt::Key_Down) {
             if (textAfterSelection().length())
                 return;
             QString prefix = hasSelectedText() ? textBeforeSelection() : text;
             if (text.compare(d->completer->currentCompletion(), d->completer->caseSensitivity()) != 0
                 || prefix.compare(d->completer->completionPrefix(), d->completer->caseSensitivity()) != 0) {
                 d->completer->setCompletionPrefix(prefix);
             } else {
                 n = (key == Qt::Key_Up) ? -1 : +1;
             }
         } else {
             d->completer->setCompletionPrefix(text);
         }
         if (!advanceToEnabledItem(n))
             return;
     } else {
 #ifndef QT_KEYPAD_NAVIGATION
         if (text.isEmpty()) {
             d->completer->popup()->hide();
             return;
         }
 #endif
         d->completer->setCompletionPrefix(text);
     }
 
     d->popupTreeView->resizeColumnToContents(0);
     d->completer->complete();
 }
 
 bool KexiSearchLineEdit::highlightMatchingSubstrings() const
 {
     return d->delegate->highlightMatchingSubstrings;
 }
 
 void KexiSearchLineEdit::setHighlightMatchingSubstrings(bool highlight)
 {
     d->delegate->highlightMatchingSubstrings = highlight;
 }
 
 #include "KexiSearchLineEdit.moc"