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Diffstat (limited to 'examples/network/googlesuggest/googlesuggest.cpp')
| -rw-r--r-- | examples/network/googlesuggest/googlesuggest.cpp | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/examples/network/googlesuggest/googlesuggest.cpp b/examples/network/googlesuggest/googlesuggest.cpp new file mode 100644 index 0000000..285a018 --- /dev/null +++ b/examples/network/googlesuggest/googlesuggest.cpp @@ -0,0 +1,223 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore> +#include <QtGui> +#include <QtNetwork> + +#include "googlesuggest.h" + +#define GSUGGEST_URL "http://google.com/complete/search?output=toolbar&q=%1" + +GSuggestCompletion::GSuggestCompletion(QLineEdit *parent): QObject(parent), editor(parent) +{ + popup = new QTreeWidget; + 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); + popup->setMouseTracking(true); + + connect(popup, SIGNAL(itemClicked(QTreeWidgetItem*, int)), + SLOT(doneCompletion())); + + popup->setWindowFlags(Qt::Popup); + popup->setFocusPolicy(Qt::NoFocus); + popup->setFocusProxy(parent); + + 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*))); + +} + +GSuggestCompletion::~GSuggestCompletion() +{ + delete popup; +} + +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; +} + +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(); +} + +void GSuggestCompletion::doneCompletion() +{ + timer->stop(); + popup->hide(); + editor->setFocus(); + QTreeWidgetItem *item = popup->currentItem(); + if (item) { + editor->setText(item->text(0)); + QKeyEvent *e; + e = new QKeyEvent(QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier); + QApplication::postEvent(editor, e); + e = new QKeyEvent(QEvent::KeyRelease, Qt::Key_Enter, Qt::NoModifier); + QApplication::postEvent(editor, e); + } +} + +void GSuggestCompletion::preventSuggest() +{ + timer->stop(); +} + +void GSuggestCompletion::autoSuggest() +{ + QString str = editor->text(); + QString url = QString(GSUGGEST_URL).arg(str); + networkManager.get(QNetworkRequest(QString(url))); +} + +void GSuggestCompletion::handleNetworkData(QNetworkReply *networkReply) +{ + QUrl url = networkReply->url(); + if (!networkReply->error()) { + QStringList choices; + QStringList hits; + + QString 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(); +} |