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* Use Nepomuk for getting the meta data instead of KFileMetaInfo.

Browse source 
* Use a QScrollArea widget to embedd the meta data, as Nepomuk provides so much meta information that it might not fit into the panel.

Open issues:
* Add the possibility to configure which kind of meta information should be shown.
* Check whether the receiving of the meta data for one file also might block the UI like when using KFileMetaInfo in combination with strigi.

CCMAIL: sebastian@trueg.de
BUG: 180742
BUG: 181592

svn path=/trunk/KDE/kdebase/apps/; revision=927542
This commit is contained in:
Peter Penz 2009-02-17 20:37:34 +00:00
parent fda792a1f5
commit b1c9b5126d
2 changed files with 52 additions and 74 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

113
src/panels/information/informationpanel.cpp
View file

@ -34,6 +34,12 @@
#include <kseparator.h>
#include <kiconloader.h>
#ifdef HAVE_NEPOMUK
#include <Nepomuk/Resource>
#include <Nepomuk/Types/Property>
#include <Nepomuk/Variant>
#endif
#include <Phonon/BackendCapabilities>
#include <Phonon/MediaObject>
#include <Phonon/SeekSlider>
@ -44,9 +50,11 @@
#include <QPainter>
#include <QPixmap>
#include <QResizeEvent>
#include <QScrollArea>
#include <QTextLayout>
#include <QTextLine>
#include <QTimer>
#include <QScrollBar>
#include <QVBoxLayout>
#include "settings/dolphinsettings.h"
@ -69,6 +77,7 @@ InformationPanel::InformationPanel(QWidget* parent) :
m_preview(0),
m_phononWidget(0),
m_metaDataWidget(0),
m_metaTextArea(0),
m_metaTextLabel(0)
{
}
@ -184,10 +193,21 @@ void InformationPanel::resizeEvent(QResizeEvent* event)
m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
m_infoTimer->start();
}
Panel::resizeEvent(event);
}
#include <kdebug.h>
bool InformationPanel::eventFilter(QObject* obj, QEvent* event)
{
// Check whether the size of the meta text area has changed and adjust
// the fixed width in a way that no horizontal scrollbar needs to be shown.
if ((obj == m_metaTextArea->viewport()) && (event->type() == QEvent::Resize)) {
QResizeEvent* resizeEvent = static_cast<QResizeEvent*>(event);
m_metaTextLabel->setFixedWidth(resizeEvent->size().width());
}
return Panel::eventFilter(obj, event);
}
void InformationPanel::showItemInfo()
{
if (!isVisible()) {
@ -391,29 +411,19 @@ void InformationPanel::showMetaInfo()
m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(item.size()));
m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
if (item.isLocalFile()) {
// TODO: See convertMetaInfo below, find a way to display only interesting information
// in a readable way
const KFileMetaInfo::WhatFlags flags = KFileMetaInfo::Fastest |
KFileMetaInfo::TechnicalInfo |
KFileMetaInfo::ContentInfo;
const QString path = item.url().path();
const KFileMetaInfo fileMetaInfo(path, QString(), flags);
if (fileMetaInfo.isValid()) {
const QHash<QString, KFileMetaInfoItem>& items = fileMetaInfo.items();
QHash<QString, KFileMetaInfoItem>::const_iterator it = items.constBegin();
const QHash<QString, KFileMetaInfoItem>::const_iterator end = items.constEnd();
QString labelText;
while (it != end) {
const KFileMetaInfoItem& metaInfoItem = it.value();
const QVariant& value = metaInfoItem.value();
if (value.isValid() && convertMetaInfo(metaInfoItem.name(), labelText)) {
m_metaTextLabel->add(labelText, value.toString());
}
++it;
}
}
#ifdef HAVE_NEPOMUK
Nepomuk::Resource res(item.url());
QHash<QUrl, Nepomuk::Variant> properties = res.properties();
QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
while (it != properties.constEnd()) {
Nepomuk::Types::Property prop(it.key());
// TODO: use Nepomuk::formatValue(res, prop) if available
// instead of it.value().toString()
m_metaTextLabel->add(prop.label(), it.value().toString());
++it;
}
#endif
}
if (m_metaDataWidget != 0) {
@ -436,45 +446,6 @@ void InformationPanel::showMetaInfo()
}
}
bool InformationPanel::convertMetaInfo(const QString& key, QString& text) const
{
struct MetaKey {
const char* key;
QString text;
};
// sorted list of keys, where its data should be shown
static const MetaKey keys[] = {
{ "http://freedesktop.org/standards/xesam/1.0/core#album", i18nc("@label", "Album:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#artist", i18nc("@label", "Artist:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#genre", i18nc("@label", "Genre:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#height", i18nc("@label", "Height:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#lineCount", i18nc("@label", "Lines:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#title", i18nc("@label", "Title:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#type", i18nc("@label", "Type:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#trackNumber", i18nc("@label", "Track:") },
{ "http://freedesktop.org/standards/xesam/1.0/core#width", i18nc("@label", "Width:") }
};
// do a binary search for the key...
int top = 0;
int bottom = sizeof(keys) / sizeof(MetaKey) - 1;
while (top <= bottom) {
const int middle = (top + bottom) / 2;
const int result = key.compare(keys[middle].key);
if (result < 0) {
bottom = middle - 1;
} else if (result > 0) {
top = middle + 1;
} else {
text = keys[middle].text;
return true;
}
}
return false;
}
KFileItem InformationPanel::fileItem() const
{
if (!m_fileItem.isNull()) {
@ -575,9 +546,20 @@ void InformationPanel::init()
// general meta text information
m_metaTextLabel = new MetaTextLabel(this);
m_metaTextLabel->setMinimumWidth(spacing);
m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
m_metaTextArea = new QScrollArea(this);
m_metaTextArea->setWidget(m_metaTextLabel);
m_metaTextArea->setWidgetResizable(true);
m_metaTextArea->setFrameShape(QFrame::NoFrame);
QWidget* viewport = m_metaTextArea->viewport();
viewport->installEventFilter(this);
QPalette palette = viewport->palette();
palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
viewport->setPalette(palette);
layout->addWidget(m_nameLabel);
layout->addWidget(new KSeparator(this));
layout->addWidget(m_preview);
@ -586,10 +568,7 @@ void InformationPanel::init()
layout->addWidget(m_metaDataWidget);
layout->addWidget(new KSeparator(this));
}
layout->addWidget(m_metaTextLabel);
// ensure that widgets in the information side bar are aligned towards the top
layout->addStretch(1);
layout->addWidget(m_metaTextArea);
setLayout(layout);
org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),

13
src/panels/information/informationpanel.h
View file

@ -37,6 +37,7 @@ class QPixmap;
class QString;
class KFileItem;
class QLabel;
class QScrollArea;
class PhononWidget;
class PixmapViewer;
class MetaDataWidget;
@ -81,6 +82,9 @@ protected:
/** @see QWidget::resizeEvent() */
virtual void resizeEvent(QResizeEvent* event);
/** @see QObject::eventFilter() */
virtual bool eventFilter(QObject* obj, QEvent* event);
private slots:
/**
* Shows the information for the item of the URL which has been provided by
@ -137,13 +141,6 @@ private:
*/
void showMetaInfo();
/**
* Converts the meta key \a key to a readable format into \a text.
* Returns true, if the string \a key represents a meta information
* that should be shown. If false is returned, \a text is not modified.
*/
bool convertMetaInfo(const QString& key, QString& text) const;
/**
* Returns the item for file where the preview and meta information
* should be received, if InformationPanel::showMultipleSelectionInfo()
@ -190,6 +187,8 @@ private:
PixmapViewer* m_preview;
PhononWidget* m_phononWidget;
MetaDataWidget* m_metaDataWidget;
QScrollArea* m_metaTextArea;
MetaTextLabel* m_metaTextLabel;
};