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|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt Assistant 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 "qhelpsearchresultwidget.h"
#include <QtCore/QList>
#include <QtCore/QString>
#include <QtCore/QPointer>
#include <QtCore/QStringList>
#include <QtGui/QLabel>
#include <QtGui/QLayout>
#include <QtGui/QMouseEvent>
#include <QtGui/QHeaderView>
#include <QtGui/QSpacerItem>
#include <QtGui/QToolButton>
#include <QtGui/QTreeWidget>
#include <QtGui/QTextBrowser>
#include <QtGui/QTreeWidgetItem>
QT_BEGIN_NAMESPACE
class QDefaultResultWidget : public QTreeWidget
{
Q_OBJECT
public:
QDefaultResultWidget(QWidget *parent = 0)
: QTreeWidget(parent)
{
header()->hide();
connect(this, SIGNAL(itemActivated(QTreeWidgetItem*, int)),
this, SLOT(itemActivated(QTreeWidgetItem*, int)));
}
void showResultPage(const QList<QHelpSearchEngine::SearchHit> hits)
{
foreach (const QHelpSearchEngine::SearchHit hit, hits)
new QTreeWidgetItem(this, QStringList(hit.first) << hit.second);
}
signals:
void requestShowLink(const QUrl &url);
private slots:
void itemActivated(QTreeWidgetItem *item, int /* column */)
{
if (item) {
QString data = item->data(1, Qt::DisplayRole).toString();
emit requestShowLink(data);
}
}
};
class QCLuceneResultWidget : public QTextBrowser
{
Q_OBJECT
public:
QCLuceneResultWidget(QWidget *parent = 0)
: QTextBrowser(parent)
{
connect(this, SIGNAL(anchorClicked(const QUrl&)),
this, SIGNAL(requestShowLink(const QUrl&)));
setContextMenuPolicy(Qt::NoContextMenu);
}
void showResultPage(const QList<QHelpSearchEngine::SearchHit> hits, bool isIndexing)
{
QString htmlFile = QString(QLatin1String("<html><head><title>%1</title></head><body>"))
.arg(tr("Search Results"));
int count = hits.count();
if (count != 0) {
if (isIndexing)
htmlFile += QString(QLatin1String("<div style=\"text-align:left; font-weight:bold; color:red\">"
"%1 <span style=\"font-weight:normal; color:black\">"
"%2</span></div></div><br>")).arg(tr("Note:"))
.arg(tr("The search results may not be complete since the "
"documentation is still being indexed!"));
foreach (const QHelpSearchEngine::SearchHit hit, hits) {
htmlFile += QString(QLatin1String("<div style=\"text-align:left; font-weight:bold\""
"><a href=\"%1\">%2</a><div style=\"color:green; font-weight:normal;"
" margin:5px\">%1</div></div><p></p>"))
.arg(hit.first).arg(hit.second);
}
} else {
htmlFile += QLatin1String("<div align=\"center\"><br><br><h2>")
+ tr("Your search did not match any documents.")
+ QLatin1String("</h2><div>");
if (isIndexing)
htmlFile += QLatin1String("<div align=\"center\"><h3>")
+ tr("(The reason for this might be that the documentation "
"is still being indexed.)")
+ QLatin1String("</h3><div>");
}
htmlFile += QLatin1String("</body></html>");
setHtml(htmlFile);
}
signals:
void requestShowLink(const QUrl &url);
private slots:
void setSource(const QUrl & /* name */) {}
};
class QHelpSearchResultWidgetPrivate : public QObject
{
Q_OBJECT
private slots:
void setResults(int hitsCount)
{
if (!searchEngine.isNull()) {
#if defined(QT_CLUCENE_SUPPORT)
showFirstResultPage();
updateNextButtonState(((hitsCount > 20) ? true : false));
#else
resultTreeWidget->clear();
resultTreeWidget->showResultPage(searchEngine->hits(0, hitsCount));
#endif
}
}
void showNextResultPage()
{
if (!searchEngine.isNull()
&& resultLastToShow < searchEngine->hitsCount()) {
resultLastToShow += 20;
resultFirstToShow += 20;
resultTextBrowser->showResultPage(searchEngine->hits(resultFirstToShow,
resultLastToShow), isIndexing);
if (resultLastToShow >= searchEngine->hitsCount())
updateNextButtonState(false);
}
updateHitRange();
}
void showLastResultPage()
{
if (!searchEngine.isNull()) {
resultLastToShow = searchEngine->hitsCount();
resultFirstToShow = resultLastToShow - (resultLastToShow % 20);
if (resultFirstToShow == resultLastToShow)
resultFirstToShow -= 20;
resultTextBrowser->showResultPage(searchEngine->hits(resultFirstToShow,
resultLastToShow), isIndexing);
updateNextButtonState(false);
}
updateHitRange();
}
void showFirstResultPage()
{
if (!searchEngine.isNull()) {
resultLastToShow = 20;
resultFirstToShow = 0;
resultTextBrowser->showResultPage(searchEngine->hits(resultFirstToShow,
resultLastToShow), isIndexing);
updatePrevButtonState(false);
}
updateHitRange();
}
void showPreviousResultPage()
{
if (!searchEngine.isNull()) {
int count = resultLastToShow % 20;
if (count == 0 || resultLastToShow != searchEngine->hitsCount())
count = 20;
resultLastToShow -= count;
resultFirstToShow = resultLastToShow -20;
resultTextBrowser->showResultPage(searchEngine->hits(resultFirstToShow,
resultLastToShow), isIndexing);
if (resultFirstToShow == 0)
updatePrevButtonState(false);
}
updateHitRange();
}
void updatePrevButtonState(bool state = true)
{
firstResultPage->setEnabled(state);
previousResultPage->setEnabled(state);
}
void updateNextButtonState(bool state = true)
{
nextResultPage->setEnabled(state);
lastResultPage->setEnabled(state);
}
void indexingStarted()
{
isIndexing = true;
}
void indexingFinished()
{
isIndexing = false;
}
private:
QHelpSearchResultWidgetPrivate(QHelpSearchEngine *engine)
: QObject()
, searchEngine(engine)
, isIndexing(false)
{
resultTreeWidget = 0;
resultTextBrowser = 0;
resultLastToShow = 20;
resultFirstToShow = 0;
firstResultPage = 0;
previousResultPage = 0;
hitsLabel = 0;
nextResultPage = 0;
lastResultPage = 0;
connect(searchEngine, SIGNAL(indexingStarted()),
this, SLOT(indexingStarted()));
connect(searchEngine, SIGNAL(indexingFinished()),
this, SLOT(indexingFinished()));
}
~QHelpSearchResultWidgetPrivate()
{
delete searchEngine;
}
QToolButton* setupToolButton(const QString &iconPath)
{
QToolButton *button = new QToolButton();
button->setEnabled(false);
button->setAutoRaise(true);
button->setIcon(QIcon(iconPath));
button->setIconSize(QSize(12, 12));
button->setMaximumSize(QSize(16, 16));
return button;
}
void updateHitRange()
{
int last = 0;
int first = 0;
int count = 0;
if (!searchEngine.isNull()) {
count = searchEngine->hitsCount();
if (count > 0) {
first = resultFirstToShow +1;
last = resultLastToShow > count ? count : resultLastToShow;
}
}
hitsLabel->setText(tr("%1 - %2 of %3 Hits").arg(first).arg(last).arg(count));
}
private:
friend class QHelpSearchResultWidget;
QPointer<QHelpSearchEngine> searchEngine;
QDefaultResultWidget *resultTreeWidget;
QCLuceneResultWidget *resultTextBrowser;
int resultLastToShow;
int resultFirstToShow;
bool isIndexing;
QToolButton *firstResultPage;
QToolButton *previousResultPage;
QLabel *hitsLabel;
QToolButton *nextResultPage;
QToolButton *lastResultPage;
};
#include "qhelpsearchresultwidget.moc"
/*!
\class QHelpSearchResultWidget
\since 4.4
\inmodule QtHelp
\brief The QHelpSearchResultWidget class provides either a tree
widget or a text browser depending on the used search engine to display
the hits found by the search.
*/
/*!
\fn void QHelpSearchResultWidget::requestShowLink(const QUrl &link)
This signal is emitted when a item is activated and its associated
\a link should be shown.
*/
QHelpSearchResultWidget::QHelpSearchResultWidget(QHelpSearchEngine *engine)
: QWidget(0)
, d(new QHelpSearchResultWidgetPrivate(engine))
{
QVBoxLayout *vLayout = new QVBoxLayout(this);
vLayout->setMargin(0);
vLayout->setSpacing(0);
#if defined(QT_CLUCENE_SUPPORT)
QHBoxLayout *hBoxLayout = new QHBoxLayout();
#ifndef Q_OS_MAC
hBoxLayout->setMargin(0);
hBoxLayout->setSpacing(0);
#endif
hBoxLayout->addWidget(d->firstResultPage = d->setupToolButton(
QString::fromUtf8(":/trolltech/assistant/images/3leftarrow.png")));
hBoxLayout->addWidget(d->previousResultPage = d->setupToolButton(
QString::fromUtf8(":/trolltech/assistant/images/1leftarrow.png")));
d->hitsLabel = new QLabel(tr("0 - 0 of 0 Hits"), this);
d->hitsLabel->setEnabled(false);
hBoxLayout->addWidget(d->hitsLabel);
d->hitsLabel->setAlignment(Qt::AlignCenter);
d->hitsLabel->setMinimumSize(QSize(150, d->hitsLabel->height()));
hBoxLayout->addWidget(d->nextResultPage = d->setupToolButton(
QString::fromUtf8(":/trolltech/assistant/images/1rightarrow.png")));
hBoxLayout->addWidget(d->lastResultPage = d->setupToolButton(
QString::fromUtf8(":/trolltech/assistant/images/3rightarrow.png")));
QSpacerItem *spacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
hBoxLayout->addItem(spacer);
vLayout->addLayout(hBoxLayout);
d->resultTextBrowser = new QCLuceneResultWidget(this);
vLayout->addWidget(d->resultTextBrowser);
connect(d->resultTextBrowser, SIGNAL(requestShowLink(const QUrl&)), this,
SIGNAL(requestShowLink(const QUrl&)));
connect(d->nextResultPage, SIGNAL(clicked()), d, SLOT(showNextResultPage()));
connect(d->lastResultPage, SIGNAL(clicked()), d, SLOT(showLastResultPage()));
connect(d->firstResultPage, SIGNAL(clicked()), d, SLOT(showFirstResultPage()));
connect(d->previousResultPage, SIGNAL(clicked()), d, SLOT(showPreviousResultPage()));
connect(d->firstResultPage, SIGNAL(clicked()), d, SLOT(updateNextButtonState()));
connect(d->previousResultPage, SIGNAL(clicked()), d, SLOT(updateNextButtonState()));
connect(d->nextResultPage, SIGNAL(clicked()), d, SLOT(updatePrevButtonState()));
connect(d->lastResultPage, SIGNAL(clicked()), d, SLOT(updatePrevButtonState()));
#else
d->resultTreeWidget = new QDefaultResultWidget(this);
vLayout->addWidget(d->resultTreeWidget);
connect(d->resultTreeWidget, SIGNAL(requestShowLink(const QUrl&)), this,
SIGNAL(requestShowLink(const QUrl&)));
#endif
connect(engine, SIGNAL(searchingFinished(int)), d, SLOT(setResults(int)));
}
/*!
Destroys the search result widget.
*/
QHelpSearchResultWidget::~QHelpSearchResultWidget()
{
delete d;
}
/*!
Returns a reference of the URL that the item at \a point owns, or an
empty URL if no item exists at that point.
*/
QUrl QHelpSearchResultWidget::linkAt(const QPoint &point)
{
QUrl url;
#if defined(QT_CLUCENE_SUPPORT)
if (d->resultTextBrowser)
url = d->resultTextBrowser->anchorAt(point);
#else
if (d->resultTreeWidget) {
QTreeWidgetItem *item = d->resultTreeWidget->itemAt(point);
if (item)
url = item->data(1, Qt::DisplayRole).toString();
}
#endif
return url;
}
QT_END_NAMESPACE
|
