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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
//! [1]
#include "googlesuggest.h"
#define GSUGGEST_URL "http://google.com/complete/search?output=toolbar&q=%1"
//! [1]
//! [2]
GSuggestCompletion::GSuggestCompletion(QLineEdit *parent): QObject(parent), editor(parent)
{
popup = new QTreeWidget;
popup->setWindowFlags(Qt::Popup);
popup->setFocusPolicy(Qt::NoFocus);
popup->setFocusProxy(parent);
popup->setMouseTracking(true);
popup->setColumnCount(2);
popup->setUniformRowHeights(true);
popup->setRootIsDecorated(false);
popup->setEditTriggers(QTreeWidget::NoEditTriggers);
popup->setSelectionBehavior(QTreeWidget::SelectRows);
popup->setFrameStyle(QFrame::Box | QFrame::Plain);
popup->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
popup->header()->hide();
popup->installEventFilter(this);
connect(popup, SIGNAL(itemClicked(QTreeWidgetItem*,int)),
SLOT(doneCompletion()));
timer = new QTimer(this);
timer->setSingleShot(true);
timer->setInterval(500);
connect(timer, SIGNAL(timeout()), SLOT(autoSuggest()));
connect(editor, SIGNAL(textEdited(QString)), timer, SLOT(start()));
connect(&networkManager, SIGNAL(finished(QNetworkReply*)),
this, SLOT(handleNetworkData(QNetworkReply*)));
}
//! [2]
//! [3]
GSuggestCompletion::~GSuggestCompletion()
{
delete popup;
}
//! [3]
//! [4]
bool GSuggestCompletion::eventFilter(QObject *obj, QEvent *ev)
{
if (obj != popup)
return false;
if (ev->type() == QEvent::MouseButtonPress) {
popup->hide();
editor->setFocus();
return true;
}
if (ev->type() == QEvent::KeyPress) {
bool consumed = false;
int key = static_cast<QKeyEvent*>(ev)->key();
switch (key) {
case Qt::Key_Enter:
case Qt::Key_Return:
doneCompletion();
consumed = true;
case Qt::Key_Escape:
editor->setFocus();
popup->hide();
consumed = true;
case Qt::Key_Up:
case Qt::Key_Down:
case Qt::Key_Home:
case Qt::Key_End:
case Qt::Key_PageUp:
case Qt::Key_PageDown:
break;
default:
editor->setFocus();
editor->event(ev);
popup->hide();
break;
}
return consumed;
}
return false;
}
//! [4]
//! [5]
void GSuggestCompletion::showCompletion(const QStringList &choices, const QStringList &hits)
{
if (choices.isEmpty() || choices.count() != hits.count())
return;
const QPalette &pal = editor->palette();
QColor color = pal.color(QPalette::Disabled, QPalette::WindowText);
popup->setUpdatesEnabled(false);
popup->clear();
for (int i = 0; i < choices.count(); ++i) {
QTreeWidgetItem * item;
item = new QTreeWidgetItem(popup);
item->setText(0, choices[i]);
item->setText(1, hits[i]);
item->setTextAlignment(1, Qt::AlignRight);
item->setTextColor(1, color);
}
popup->setCurrentItem(popup->topLevelItem(0));
popup->resizeColumnToContents(0);
popup->resizeColumnToContents(1);
popup->adjustSize();
popup->setUpdatesEnabled(true);
int h = popup->sizeHintForRow(0) * qMin(7, choices.count()) + 3;
popup->resize(popup->width(), h);
popup->move(editor->mapToGlobal(QPoint(0, editor->height())));
popup->setFocus();
popup->show();
}
//! [5]
//! [6]
void GSuggestCompletion::doneCompletion()
{
timer->stop();
popup->hide();
editor->setFocus();
QTreeWidgetItem *item = popup->currentItem();
if (item) {
editor->setText(item->text(0));
QMetaObject::invokeMethod(editor, "returnPressed");
}
}
//! [6]
//! [7]
void GSuggestCompletion::autoSuggest()
{
QString str = editor->text();
QString url = QString(GSUGGEST_URL).arg(str);
networkManager.get(QNetworkRequest(QString(url)));
}
//! [7]
//! [8]
void GSuggestCompletion::preventSuggest()
{
timer->stop();
}
//! [8]
//! [9]
void GSuggestCompletion::handleNetworkData(QNetworkReply *networkReply)
{
QUrl url = networkReply->url();
if (!networkReply->error()) {
QStringList choices;
QStringList hits;
QByteArray response(networkReply->readAll());
QXmlStreamReader xml(response);
while (!xml.atEnd()) {
xml.readNext();
if (xml.tokenType() == QXmlStreamReader::StartElement)
if (xml.name() == "suggestion") {
QStringRef str = xml.attributes().value("data");
choices << str.toString();
}
if (xml.tokenType() == QXmlStreamReader::StartElement)
if (xml.name() == "num_queries") {
QStringRef str = xml.attributes().value("int");
hits << str.toString();
}
}
showCompletion(choices, hits);
}
networkReply->deleteLater();
}
//! [9]
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