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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: 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.
**
****************************************************************************/
#include "historycompleter.h"
#include "qtcassert.h"
#include <QSettings>
#include <QItemDelegate>
#include <QKeyEvent>
#include <QLineEdit>
#include <QListView>
#include <QPainter>
namespace Utils {
namespace Internal {
static QSettings *theSettings = 0;
class HistoryCompleterPrivate : public QAbstractListModel
{
public:
HistoryCompleterPrivate() : maxLines(30), lineEdit(0) {}
int rowCount(const QModelIndex &parent = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
void clearHistory();
void saveEntry(const QString &str);
QStringList list;
QString historyKey;
int maxLines;
QLineEdit *lineEdit;
};
class HistoryLineDelegate : public QItemDelegate
{
public:
HistoryLineDelegate(QObject *parent)
: QItemDelegate(parent)
, pixmap(QLatin1String(":/core/images/editclear.png"))
{}
void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
QItemDelegate::paint(painter,option,index);
QRect r = QStyle::alignedRect(option.direction, Qt::AlignRight | Qt::AlignVCenter , pixmap.size(), option.rect);
painter->drawPixmap(r, pixmap);
}
QPixmap pixmap;
};
class HistoryLineView : public QListView
{
public:
HistoryLineView(HistoryCompleterPrivate *model_)
: model(model_)
{
HistoryLineDelegate *delegate = new HistoryLineDelegate(this);
pixmapWidth = delegate->pixmap.width();
setItemDelegate(delegate);
}
private:
void mousePressEvent(QMouseEvent *event)
{
int rr= event->x();
if (layoutDirection() == Qt::LeftToRight)
rr = viewport()->width() - event->x();
if (rr < pixmapWidth) {
model->removeRow(indexAt(event->pos()).row());
return;
}
QListView::mousePressEvent(event);
}
HistoryCompleterPrivate *model;
int pixmapWidth;
};
} // namespace Internal
using namespace Internal;
int HistoryCompleterPrivate::rowCount(const QModelIndex &parent) const
{
return parent.isValid() ? 0 : list.count();
}
QVariant HistoryCompleterPrivate::data(const QModelIndex &index, int role) const
{
if (index.row() >= list.count() || index.column() != 0)
return QVariant();
if (role == Qt::DisplayRole || role == Qt::EditRole)
return list.at(index.row());
return QVariant();
}
bool HistoryCompleterPrivate::removeRows(int row, int count, const QModelIndex &parent)
{
QTC_ASSERT(theSettings, return false);
if (row + count > list.count())
return false;
beginRemoveRows(parent, row, row + count -1);
for (int i = 0; i < count; ++i)
list.removeAt(row);
theSettings->setValue(historyKey, list);
endRemoveRows();
return true;
}
void HistoryCompleterPrivate::clearHistory()
{
beginResetModel();
list.clear();
endResetModel();
}
void HistoryCompleterPrivate::saveEntry(const QString &str)
{
QTC_ASSERT(theSettings, return);
const QString &entry = str.trimmed();
int removeIndex = list.indexOf(entry);
if (removeIndex != -1)
removeRow(removeIndex);
beginInsertRows (QModelIndex(), list.count(), list.count());
list.prepend(entry);
list = list.mid(0, maxLines);
endInsertRows();
theSettings->setValue(historyKey, list);
}
HistoryCompleter::HistoryCompleter(QLineEdit *lineEdit, const QString &historyKey, QObject *parent)
: QCompleter(parent),
d(new HistoryCompleterPrivate)
{
QTC_ASSERT(lineEdit, return);
QTC_ASSERT(!historyKey.isEmpty(), return);
QTC_ASSERT(theSettings, return);
d->historyKey = QLatin1String("CompleterHistory/") + historyKey;
d->list = theSettings->value(d->historyKey).toStringList();
d->lineEdit = lineEdit;
if (d->list.count())
lineEdit->setText(d->list.at(0));
setModel(d);
setPopup(new HistoryLineView(d));
lineEdit->installEventFilter(this);
connect(lineEdit, SIGNAL(editingFinished()), this, SLOT(saveHistory()));
}
bool HistoryCompleter::removeHistoryItem(int index)
{
return d->removeRow(index);
}
HistoryCompleter::~HistoryCompleter()
{
delete d;
}
bool HistoryCompleter::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::KeyPress
&& static_cast<QKeyEvent *>(event)->key() == Qt::Key_Down
&& !popup()->isVisible()) {
setCompletionPrefix(QString());
complete();
}
return QCompleter::eventFilter(obj, event);
}
int HistoryCompleter::historySize() const
{
return d->rowCount();
}
int HistoryCompleter::maximalHistorySize() const
{
return d->maxLines;
}
void HistoryCompleter::setMaximalHistorySize(int numberOfEntries)
{
d->maxLines = numberOfEntries;
}
void HistoryCompleter::clearHistory()
{
d->clearHistory();
}
void HistoryCompleter::saveHistory()
{
d->saveEntry(d->lineEdit->text());
}
void HistoryCompleter::setSettings(QSettings *settings)
{
Internal::theSettings = settings;
}
} // namespace Utils
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