chore: adjusted the project directory structure

CMakeLists.txt

@@ -12,30 +12,34 @@ set (QT_MINIMUM_VERSION "5.10")
 find_package(Qt5 ${QT_MINIMUM_VERSION} CONFIG REQUIRED Widgets Svg LinguistTools)
 
 set (PPIC_CPP_FILES
-    main.cpp
-    mainwindow.cpp
-    graphicsview.cpp
-    graphicsscene.cpp
-    bottombuttongroup.cpp
-    navigatorview.cpp
-    opacityhelper.cpp
-    toolbutton.cpp
-    settings.cpp
-    settingsdialog.cpp
-    aboutdialog.cpp
+    app/main.cpp
+    app/mainwindow.cpp
+    app/graphicsview.cpp
+    app/graphicsscene.cpp
+    app/bottombuttongroup.cpp
+    app/navigatorview.cpp
+    app/opacityhelper.cpp
+    app/toolbutton.cpp
+    app/settings.cpp
+    app/settingsdialog.cpp
+    app/aboutdialog.cpp
+    app/metadatamodel.cpp
+    app/metadatadialog.cpp
 )
 
 set (PPIC_HEADER_FILES
-    mainwindow.h
-    graphicsview.h
-    graphicsscene.h
-    bottombuttongroup.h
-    navigatorview.h
-    opacityhelper.h
-    toolbutton.h
-    settings.h
-    settingsdialog.h
-    aboutdialog.h
+    app/mainwindow.h
+    app/graphicsview.h
+    app/graphicsscene.h
+    app/bottombuttongroup.h
+    app/navigatorview.h
+    app/opacityhelper.h
+    app/toolbutton.h
+    app/settings.h
+    app/settingsdialog.h
+    app/aboutdialog.h
+    app/metadatamodel.h
+    app/metadatadialog.h
 )
 
 set (PPIC_QRC_FILES
@@ -49,7 +53,7 @@ set (PPIC_RC_FILES
 set (EXE_NAME ppic)
 
 # Translation
-file (GLOB PPIC_TS_FILES languages/*.ts)
+file (GLOB PPIC_TS_FILES translations/*.ts)
 set (PPIC_CPP_FILES_FOR_I18N ${PPIC_CPP_FILES})
 
 qt5_create_translation(PPIC_QM_FILES ${PPIC_CPP_FILES_FOR_I18N} ${PPIC_TS_FILES})

app/graphicsview.cpp

@@ -51,8 +51,15 @@ void GraphicsView::showFileFromUrl(const QUrl &url, bool doRequestGallery)
         // QImage::Format imageFormat = imageReader.imageFormat();
         if (imageReader.format().isEmpty()) {
             showText(tr("File is not a valid image"));
+        } else if (!imageReader.supportsAnimation() && !imageReader.canRead()) {
+            showText(tr("Image data is invalid or currently unsupported"));
         } else {
-            showImage(QPixmap::fromImageReader(&imageReader));
+            const QPixmap & pixmap = QPixmap::fromImageReader(&imageReader);
+            if (pixmap.isNull()) {
+                showText(tr("Image data is invalid or currently unsupported"));
+            } else {
+                showImage(pixmap);
+            }
         }
     }
 

app/mainwindow.cpp

@@ -8,6 +8,8 @@
 #include "graphicsscene.h"
 #include "settingsdialog.h"
 #include "aboutdialog.h"
+#include "metadatamodel.h"
+#include "metadatadialog.h"
 
 #include <QMouseEvent>
 #include <QMovie>
@@ -487,6 +489,17 @@ void MainWindow::contextMenuEvent(QContextMenuEvent *event)
         ad->deleteLater();
     });
 
+    QAction * propertiesAction = new QAction(tr("Properties"));
+    connect(propertiesAction, &QAction::triggered, this, [ = ](){
+        MetadataModel * md = new MetadataModel();
+        md->setFile(currentFileUrl.toLocalFile());
+
+        MetadataDialog * ad = new MetadataDialog(this);
+        ad->setMetadataModel(md);
+        ad->exec();
+        ad->deleteLater();
+    });
+
     if (copyMenu->actions().count() == 1) {
         menu->addActions(copyMenu->actions());
     } else {
@@ -503,6 +516,10 @@ void MainWindow::contextMenuEvent(QContextMenuEvent *event)
     menu->addSeparator();
     menu->addAction(toggleSettings);
     menu->addAction(helpAction);
+    if (currentFileUrl.isValid()) {
+        menu->addSeparator();
+        menu->addAction(propertiesAction);
+    }
     menu->exec(mapToGlobal(event->pos()));
     menu->deleteLater();
 

app/metadatadialog.cpp

@@ -0,0 +1,101 @@
+#include "metadatadialog.h"
+
+#include <QDialogButtonBox>
+#include <QPainter>
+#include <QStyledItemDelegate>
+#include <QTreeView>
+#include <QVBoxLayout>
+#include <QHeaderView>
+
+#include "metadatamodel.h"
+
+class PropertyTreeView : public QTreeView
+{
+public:
+    explicit PropertyTreeView(QWidget* parent) : QTreeView(parent) {}
+    ~PropertyTreeView() {}
+
+protected:
+    void rowsInserted(const QModelIndex& parent, int start, int end) override
+    {
+        QTreeView::rowsInserted(parent, start, end);
+        if (!parent.isValid()) {
+            for (int row = start; row <= end; ++row) {
+                setupSection(row);
+            }
+        }
+    }
+
+    void reset() override
+    {
+        QTreeView::reset();
+        if (model()) {
+            for (int row = 0; row < model()->rowCount(); ++row) {
+                setupSection(row);
+            }
+        }
+    }
+
+private:
+    void setupSection(int row)
+    {
+        expand(model()->index(row, 0));
+        setFirstColumnSpanned(row, QModelIndex(), true);
+    }
+};
+
+class PropertyTreeItemDelegate : public QStyledItemDelegate
+{
+public:
+    PropertyTreeItemDelegate(QObject* parent)
+        : QStyledItemDelegate(parent)
+    {}
+
+protected:
+    void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const override
+    {
+        QStyleOptionViewItem opt = option;
+        if (!index.parent().isValid()) {
+            opt.font.setBold(true);
+            opt.features.setFlag(QStyleOptionViewItem::Alternate);
+        }
+        QStyledItemDelegate::paint(painter, opt, index);
+    }
+};
+
+MetadataDialog::MetadataDialog(QWidget *parent)
+    : QDialog(parent)
+    , m_treeView(new PropertyTreeView(this))
+{
+    m_treeView->setRootIsDecorated(false);
+    m_treeView->setIndentation(0);
+    m_treeView->setItemDelegate(new PropertyTreeItemDelegate(m_treeView));
+    m_treeView->header()->resizeSection(0, sizeHint().width() / 2);
+
+    setWindowTitle(tr("Image Metadata"));
+
+    QDialogButtonBox * buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
+
+    setLayout(new QVBoxLayout);
+    layout()->addWidget(m_treeView);
+    layout()->addWidget(buttonBox);
+
+    connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::close);
+
+    setWindowFlag(Qt::WindowContextHelpButtonHint, false);
+}
+
+MetadataDialog::~MetadataDialog()
+{
+
+}
+
+void MetadataDialog::setMetadataModel(MetadataModel * model)
+{
+    m_treeView->setModel(model);
+}
+
+QSize MetadataDialog::sizeHint() const
+{
+    return QSize(520, 350);
+}

app/metadatadialog.h

@@ -0,0 +1,26 @@
+#ifndef METADATADIALOG_H
+#define METADATADIALOG_H
+
+#include <QDialog>
+
+QT_BEGIN_NAMESPACE
+class QTreeView;
+QT_END_NAMESPACE
+
+class MetadataModel;
+class MetadataDialog : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit MetadataDialog(QWidget * parent);
+    ~MetadataDialog() override;
+
+    void setMetadataModel(MetadataModel * model);
+
+    QSize sizeHint() const override;
+
+private:
+    QTreeView * m_treeView = nullptr;
+};
+
+#endif // METADATADIALOG_H

app/metadatamodel.cpp

@@ -0,0 +1,205 @@
+#include "metadatamodel.h"
+
+#include <QDebug>
+#include <QDateTime>
+#include <QFileInfo>
+#include <QImageReader>
+
+MetadataModel::MetadataModel(QObject *parent)
+    : QAbstractItemModel(parent)
+{
+
+}
+
+MetadataModel::~MetadataModel()
+{
+
+}
+
+void MetadataModel::setFile(const QString &imageFilePath)
+{
+    QFileInfo fileInfo(imageFilePath);
+    // It'll be fine if we don't re-use the image reader we pass to the graphics scene for now.
+    QImageReader imgReader(imageFilePath);
+    imgReader.setAutoTransform(true);
+    imgReader.setDecideFormatFromContent(true);
+
+    const QString & itemTypeString = tr("%1 File").arg(QString(imgReader.format().toUpper()));
+    const QString & sizeString = QLocale().formattedDataSize(fileInfo.size());
+    const QString & birthTimeString = QLocale().toString(fileInfo.birthTime(), QLocale::LongFormat);
+    const QString & lastModifiedTimeString = QLocale().toString(fileInfo.lastModified(), QLocale::LongFormat);
+    const QString & imageDimensionsString = imageSize(imgReader.size());
+    const QString & imageRatioString = imageSizeRatio(imgReader.size());
+
+#if 0
+    appendSection(QStringLiteral("Description"), tr("Description", "Section name."));
+    appendSection(QStringLiteral("Origin"), tr("Origin", "Section name."));
+#endif // 0
+    appendSection(QStringLiteral("Image"), tr("Image", "Section name."));
+#if 0
+    appendSection(QStringLiteral("Camera"), tr("Camera", "Section name."));
+    appendSection(QStringLiteral("AdvancedPhoto"), tr("Advanced photo", "Section name."));
+    appendSection(QStringLiteral("GPS"), tr("GPS", "Section name."));
+#endif // 0
+    appendSection(QStringLiteral("File"), tr("File", "Section name."));
+
+    appendProperty(QStringLiteral("Image"), QStringLiteral("Image.Dimensions"),
+                   tr("Dimensions"), imageDimensionsString);
+    appendProperty(QStringLiteral("Image"), QStringLiteral("Image.SizeRatio"),
+                   tr("Aspect Ratio"), imageRatioString);
+
+    appendProperty(QStringLiteral("File"), QStringLiteral("File.Name"),
+                   tr("Name"), fileInfo.fileName());
+    appendProperty(QStringLiteral("File"), QStringLiteral("File.ItemType"),
+                   tr("Item type"), itemTypeString);
+    appendProperty(QStringLiteral("File"), QStringLiteral("File.Path"),
+                   tr("Folder path"), fileInfo.path());
+    appendProperty(QStringLiteral("File"), QStringLiteral("File.Size"),
+                   tr("Size"), sizeString);
+    appendProperty(QStringLiteral("File"), QStringLiteral("File.CreatedTime"),
+                   tr("Date Created"), birthTimeString);
+    appendProperty(QStringLiteral("File"), QStringLiteral("File.LastModified"),
+                   tr("Date Modified"), lastModifiedTimeString);
+}
+
+QString MetadataModel::imageSize(const QSize &size)
+{
+    QString imageSize;
+
+    if (size.isValid()) {
+        imageSize = tr("%1 x %2").arg(QString::number(size.width()), QString::number(size.height()));
+    } else {
+        imageSize = QLatin1Char('-');
+    }
+
+    return imageSize;
+}
+
+int simplegcd(int a, int b) {
+    return b == 0 ? a : simplegcd(b, a % b);
+}
+
+QString MetadataModel::imageSizeRatio(const QSize &size)
+{
+    if (!size.isValid()) {
+        return QStringLiteral("-");
+    }
+    int gcd = simplegcd(size.width(), size.height());
+    return tr("%1 : %2").arg(QString::number(size.width() / gcd), QString::number(size.height() / gcd));
+}
+
+bool MetadataModel::appendSection(const QString &sectionKey, const QString &sectionDisplayName)
+{
+    if (m_sections.contains(sectionKey)) {
+        return false;
+    }
+
+    m_sections.append(sectionKey);
+    m_sectionProperties[sectionKey] = qMakePair<QString, QList<QString> >(sectionDisplayName, {});
+
+    return true;
+}
+
+bool MetadataModel::appendProperty(const QString &sectionKey, const QString &propertyKey, const QString &propertyDisplayName, const QString &propertyValue)
+{
+    if (!m_sections.contains(sectionKey)) {
+        return false;
+    }
+
+    QList<QString> & propertyList = m_sectionProperties[sectionKey].second;
+    if (!propertyList.contains(propertyKey)) {
+        propertyList.append(propertyKey);
+    }
+
+    m_properties[propertyKey] = qMakePair<QString, QString>(propertyDisplayName, propertyValue);
+
+    return true;
+}
+
+bool MetadataModel::updateProperty(const QString &propertyKey, const QString &propertyValue)
+{
+    if (m_properties.contains(propertyKey)) {
+        m_properties[propertyKey].second = propertyValue;
+        return true;
+    }
+
+    return false;
+}
+
+QModelIndex MetadataModel::index(int row, int column, const QModelIndex &parent) const
+{
+    if (!hasIndex(row, column, parent)) {
+        return QModelIndex();
+    }
+
+    if (!parent.isValid()) {
+        return createIndex(row, column, RowType::SectionRow);
+    } else {
+        // internalid param: row means nth section it belongs to.
+        return createIndex(row, column, RowType::PropertyRow + parent.row());
+    }
+}
+
+QModelIndex MetadataModel::parent(const QModelIndex &child) const
+{
+    if (!child.isValid()) {
+        return QModelIndex();
+    }
+
+    if (child.internalId() == RowType::SectionRow) {
+        return QModelIndex();
+    } else {
+        return createIndex(child.internalId() - RowType::PropertyRow, 0, SectionRow);
+    }
+}
+
+int MetadataModel::rowCount(const QModelIndex &parent) const
+{
+    if (!parent.isValid()) {
+        return m_sections.count();
+    }
+
+    if (parent.internalId() == RowType::SectionRow) {
+        const QString & sectionKey = m_sections[parent.row()];
+        return m_sectionProperties[sectionKey].second.count();
+    }
+
+    return 0;
+}
+
+int MetadataModel::columnCount(const QModelIndex &) const
+{
+    // Always key(display name) and value.
+    return 2;
+}
+
+QVariant MetadataModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid()) {
+        return QVariant();
+    }
+
+    if (role != Qt::DisplayRole) {
+        return QVariant();
+    }
+
+    if (index.internalId() == RowType::SectionRow) {
+        return (index.column() == 0) ? m_sectionProperties[m_sections[index.row()]].first
+                                     : QVariant();
+    } else {
+        int sectionIndex = index.internalId() - RowType::PropertyRow;
+        const QString & sectionKey = m_sections[sectionIndex];
+        const QList<QString> & propertyList = m_sectionProperties[sectionKey].second;
+        return (index.column() == 0) ? m_properties[propertyList[index.row()]].first
+                                     : m_properties[propertyList[index.row()]].second;
+    }
+}
+
+QVariant MetadataModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+    if (orientation == Qt::Vertical || role != Qt::DisplayRole) {
+        return QVariant();
+    }
+
+    return section == 0 ? tr("Property") : tr("Value");
+}

app/metadatamodel.h

@@ -0,0 +1,43 @@
+#ifndef METADATAMODEL_H
+#define METADATAMODEL_H
+
+#include <QAbstractItemModel>
+
+class MetadataModel : public QAbstractItemModel
+{
+    Q_OBJECT
+
+public:
+    explicit MetadataModel(QObject *parent = nullptr);
+    ~MetadataModel();
+
+    void setFile(const QString & imageFilePath);
+    static QString imageSize(const QSize &size);
+    static QString imageSizeRatio(const QSize &size);
+    bool appendSection(const QString & sectionKey, const QString & sectionDisplayName);
+    bool appendProperty(const QString & sectionKey, const QString & propertyKey,
+                        const QString & propertyDisplayName, const QString & propertyValue = QString());
+    bool updateProperty(const QString & propertyKey, const QString & propertyValue);
+
+private:
+    enum RowType : quintptr {
+        SectionRow,
+        PropertyRow,
+    };
+
+    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+    QModelIndex parent(const QModelIndex &child) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex & = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
+
+    // [SECTION_KEY]
+    QList<QString> m_sections;
+    // {SECTION_KEY: (SECTION_DISPLAY_NAME, [PROPERTY_KEY])}
+    QMap<QString, QPair<QString, QList<QString> > > m_sectionProperties;
+    // {PROPERTY_KEY: (PROPERTY_DISPLAY_NAME, PROPERTY_VALUE)}
+    QMap<QString, QPair<QString, QString> > m_properties;
+};
+
+#endif // METADATAMODEL_H

languages/PineapplePictures.ts

@@ -1,294 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!DOCTYPE TS>
-<TS version="2.1">
-<context>
-    <name>AboutDialog</name>
-    <message>
-        <location filename="../aboutdialog.cpp" line="22"/>
-        <source>About</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="25"/>
-        <source>Launch application with image file path as argument to load the file.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="26"/>
-        <source>Drag and drop image file onto the window is also supported.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="27"/>
-        <source>Context menu option explanation:</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="31"/>
-        <source>Make window stay on top of all other windows.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="35"/>
-        <source>Avoid close window accidentally. (eg. by double clicking the window)</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="44"/>
-        <source>Version: %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="47"/>
-        <source>Copyright (c) 2020 %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="49"/>
-        <source>Logo designed by %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="51"/>
-        <source>Built with Qt %1 (%2)</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="52"/>
-        <source>Source code</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="58"/>
-        <source>Contributors</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
-        <source>List of contributors on GitHub</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="61"/>
-        <source>Thanks to all people who contributed to this project.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="65"/>
-        <source>Translators</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="66"/>
-        <source>I would like to thank the following people who volunteered to translate this application.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="131"/>
-        <source>&amp;Special Thanks</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="133"/>
-        <source>&amp;Third-party Libraries</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="72"/>
-        <source>Your Rights</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="74"/>
-        <source>%1 is released under the MIT License.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
-        <source>This license grants people a number of freedoms:</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
-        <source>You are free to use %1, for any purpose</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="77"/>
-        <source>You are free to distribute %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="78"/>
-        <source>You can study how %1 works and change it</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="79"/>
-        <source>You can distribute changed versions of %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
-        <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="109"/>
-        <source>Third-party Libraries used by %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="110"/>
-        <source>%1 is built on the following free software libraries:</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="129"/>
-        <source>&amp;Help</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="130"/>
-        <source>&amp;About</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="132"/>
-        <source>&amp;License</source>
-        <translation type="unfinished"></translation>
-    </message>
-</context>
-<context>
-    <name>GraphicsScene</name>
-    <message>
-        <location filename="../graphicsscene.cpp" line="16"/>
-        <source>Drag image here</source>
-        <translation type="unfinished"></translation>
-    </message>
-</context>
-<context>
-    <name>GraphicsView</name>
-    <message>
-        <location filename="../graphicsview.cpp" line="254"/>
-        <source>File url list is empty</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../graphicsview.cpp" line="53"/>
-        <source>File is not a valid image</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../graphicsview.cpp" line="262"/>
-        <source>Image data is invalid</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../graphicsview.cpp" line="269"/>
-        <source>Not supported mimedata: %1</source>
-        <translation type="unfinished"></translation>
-    </message>
-</context>
-<context>
-    <name>MainWindow</name>
-    <message>
-        <location filename="../mainwindow.cpp" line="175"/>
-        <source>File url list is empty</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="408"/>
-        <source>&amp;Copy</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="429"/>
-        <source>Copy P&amp;ixmap</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="434"/>
-        <source>Copy &amp;File Path</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="444"/>
-        <source>&amp;Paste Image</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="450"/>
-        <source>&amp;Paste Image File</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="30"/>
-        <location filename="../mainwindow.cpp" line="455"/>
-        <source>Stay on top</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../aboutdialog.cpp" line="34"/>
-        <location filename="../mainwindow.cpp" line="462"/>
-        <source>Protected mode</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="469"/>
-        <source>Configure...</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../mainwindow.cpp" line="476"/>
-        <source>Help</source>
-        <translation type="unfinished"></translation>
-    </message>
-</context>
-<context>
-    <name>SettingsDialog</name>
-    <message>
-        <location filename="../settingsdialog.cpp" line="15"/>
-        <source>Settings</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="20"/>
-        <source>Do nothing</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="21"/>
-        <source>Close the window</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
-        <source>Toggle maximize</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="30"/>
-        <source>Stay on top when start-up</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="31"/>
-        <source>Double-click behavior</source>
-        <translation type="unfinished"></translation>
-    </message>
-</context>
-<context>
-    <name>main</name>
-    <message>
-        <location filename="../main.cpp" line="27"/>
-        <source>Pineapple Pictures</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location filename="../main.cpp" line="31"/>
-        <source>File list.</source>
-        <translation type="unfinished"></translation>
-    </message>
-</context>
-</TS>

pineapple-pictures.pro

@@ -1,9 +1,3 @@
-#-------------------------------------------------
-#
-# Project created by QtCreator 2019-09-26T23:36:07
-#
-#-------------------------------------------------
-
 QT       += core widgets gui svg
 
 TARGET = ppic
@@ -23,33 +17,37 @@ DEFINES += QT_DEPRECATED_WARNINGS
 CONFIG += c++11 lrelease embed_translations
 
 SOURCES += \
-    aboutdialog.cpp \
-        main.cpp \
-        mainwindow.cpp \
-    graphicsview.cpp \
-    bottombuttongroup.cpp \
-    graphicsscene.cpp \
-    navigatorview.cpp \
-    opacityhelper.cpp \
-    toolbutton.cpp \
-    settings.cpp \
-    settingsdialog.cpp
+    app/aboutdialog.cpp \
+    app/main.cpp \
+    app/mainwindow.cpp \
+    app/graphicsview.cpp \
+    app/bottombuttongroup.cpp \
+    app/graphicsscene.cpp \
+    app/navigatorview.cpp \
+    app/opacityhelper.cpp \
+    app/toolbutton.cpp \
+    app/settings.cpp \
+    app/settingsdialog.cpp \
+    app/metadatamodel.cpp \
+    app/metadatadialog.cpp
 
 HEADERS += \
-    aboutdialog.h \
-        mainwindow.h \
-    graphicsview.h \
-    bottombuttongroup.h \
-    graphicsscene.h \
-    navigatorview.h \
-    opacityhelper.h \
-    toolbutton.h \
-    settings.h \
-    settingsdialog.h
+    app/aboutdialog.h \
+    app/mainwindow.h \
+    app/graphicsview.h \
+    app/bottombuttongroup.h \
+    app/graphicsscene.h \
+    app/navigatorview.h \
+    app/opacityhelper.h \
+    app/toolbutton.h \
+    app/settings.h \
+    app/settingsdialog.h \
+    app/metadatamodel.h \
+    app/metadatadialog.h
 
 TRANSLATIONS = \
-    languages/PineapplePictures.ts \
-    languages/PineapplePictures_zh_CN.ts
+    translations/PineapplePictures.ts \
+    translations/PineapplePictures_zh_CN.ts
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin

translations/PineapplePictures.ts

@@ -0,0 +1,423 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1">
+<context>
+    <name>AboutDialog</name>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="22"/>
+        <source>About</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="25"/>
+        <source>Launch application with image file path as argument to load the file.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="26"/>
+        <source>Drag and drop image file onto the window is also supported.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="27"/>
+        <source>Context menu option explanation:</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="31"/>
+        <source>Make window stay on top of all other windows.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="35"/>
+        <source>Avoid close window accidentally. (eg. by double clicking the window)</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="44"/>
+        <source>Version: %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="47"/>
+        <source>Copyright (c) 2020 %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="49"/>
+        <source>Logo designed by %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="51"/>
+        <source>Built with Qt %1 (%2)</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="52"/>
+        <source>Source code</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="58"/>
+        <source>Contributors</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="60"/>
+        <source>List of contributors on GitHub</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="61"/>
+        <source>Thanks to all people who contributed to this project.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="65"/>
+        <source>Translators</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="66"/>
+        <source>I would like to thank the following people who volunteered to translate this application.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="131"/>
+        <source>&amp;Special Thanks</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="133"/>
+        <source>&amp;Third-party Libraries</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="72"/>
+        <source>Your Rights</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="74"/>
+        <source>%1 is released under the MIT License.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="75"/>
+        <source>This license grants people a number of freedoms:</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="76"/>
+        <source>You are free to use %1, for any purpose</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="77"/>
+        <source>You are free to distribute %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="78"/>
+        <source>You can study how %1 works and change it</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="79"/>
+        <source>You can distribute changed versions of %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="81"/>
+        <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="109"/>
+        <source>Third-party Libraries used by %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="110"/>
+        <source>%1 is built on the following free software libraries:</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="129"/>
+        <source>&amp;Help</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="130"/>
+        <source>&amp;About</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="132"/>
+        <source>&amp;License</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>GraphicsScene</name>
+    <message>
+        <location filename="../app/graphicsscene.cpp" line="16"/>
+        <source>Drag image here</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>GraphicsView</name>
+    <message>
+        <location filename="../app/graphicsview.cpp" line="261"/>
+        <source>File url list is empty</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/graphicsview.cpp" line="53"/>
+        <source>File is not a valid image</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/graphicsview.cpp" line="55"/>
+        <location filename="../app/graphicsview.cpp" line="59"/>
+        <source>Image data is invalid or currently unsupported</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/graphicsview.cpp" line="269"/>
+        <source>Image data is invalid</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/graphicsview.cpp" line="276"/>
+        <source>Not supported mimedata: %1</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>MainWindow</name>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="178"/>
+        <source>File url list is empty</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="417"/>
+        <source>&amp;Copy</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="438"/>
+        <source>Copy P&amp;ixmap</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="443"/>
+        <source>Copy &amp;File Path</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="453"/>
+        <source>&amp;Paste Image</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="459"/>
+        <source>&amp;Paste Image File</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="492"/>
+        <source>Properties</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="30"/>
+        <location filename="../app/mainwindow.cpp" line="464"/>
+        <source>Stay on top</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="34"/>
+        <location filename="../app/mainwindow.cpp" line="471"/>
+        <source>Protected mode</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="478"/>
+        <source>Configure...</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/mainwindow.cpp" line="485"/>
+        <source>Help</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>MetadataDialog</name>
+    <message>
+        <location filename="../app/metadatadialog.cpp" line="75"/>
+        <source>Image Metadata</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>MetadataModel</name>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="36"/>
+        <source>Origin</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="38"/>
+        <source>Image</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="44"/>
+        <source>File</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="40"/>
+        <source>Camera</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="27"/>
+        <source>%1 File</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="35"/>
+        <source>Description</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="41"/>
+        <source>Advanced photo</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="42"/>
+        <source>GPS</source>
+        <comment>Section name.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="47"/>
+        <source>Dimensions</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="49"/>
+        <source>Aspect Ratio</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="52"/>
+        <source>Name</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="54"/>
+        <source>Item type</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="56"/>
+        <source>Folder path</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="58"/>
+        <source>Size</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="60"/>
+        <source>Date Created</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="62"/>
+        <source>Date Modified</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="70"/>
+        <source>%1 x %2</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="88"/>
+        <source>%1 : %2</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="204"/>
+        <source>Property</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="204"/>
+        <source>Value</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>SettingsDialog</name>
+    <message>
+        <location filename="../app/settingsdialog.cpp" line="15"/>
+        <source>Settings</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/settingsdialog.cpp" line="20"/>
+        <source>Do nothing</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/settingsdialog.cpp" line="21"/>
+        <source>Close the window</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/settingsdialog.cpp" line="22"/>
+        <source>Toggle maximize</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/settingsdialog.cpp" line="30"/>
+        <source>Stay on top when start-up</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/settingsdialog.cpp" line="31"/>
+        <source>Double-click behavior</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>main</name>
+    <message>
+        <location filename="../app/main.cpp" line="27"/>
+        <source>Pineapple Pictures</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../app/main.cpp" line="31"/>
+        <source>File list.</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+</TS>

translations/PineapplePictures_zh_CN.ts

@@ -4,157 +4,157 @@
 <context>
     <name>AboutDialog</name>
     <message>
-        <location filename="../aboutdialog.cpp" line="22"/>
+        <location filename="../app/aboutdialog.cpp" line="22"/>
         <source>About</source>
         <translation>关于</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="25"/>
+        <location filename="../app/aboutdialog.cpp" line="25"/>
         <source>Launch application with image file path as argument to load the file.</source>
         <translation>以图片文件的路径作为参数运行程序即可直接打开图片文件。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="26"/>
+        <location filename="../app/aboutdialog.cpp" line="26"/>
         <source>Drag and drop image file onto the window is also supported.</source>
         <translation>也支持拖放图片文件到窗口内来加载图片。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="27"/>
+        <location filename="../app/aboutdialog.cpp" line="27"/>
         <source>Context menu option explanation:</source>
         <translation>菜单项说明：</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="31"/>
+        <location filename="../app/aboutdialog.cpp" line="31"/>
         <source>Make window stay on top of all other windows.</source>
         <translation>使窗口始终至于其它非置顶窗口上方。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="35"/>
+        <location filename="../app/aboutdialog.cpp" line="35"/>
         <source>Avoid close window accidentally. (eg. by double clicking the window)</source>
         <translation>避免窗口意外关闭。（如：不小心双击了窗口触发了关闭窗口行为）</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="44"/>
+        <location filename="../app/aboutdialog.cpp" line="44"/>
         <source>Version: %1</source>
         <translation>版本: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="47"/>
+        <location filename="../app/aboutdialog.cpp" line="47"/>
         <source>Copyright (c) 2020 %1</source>
         <translation>版权所有 (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="49"/>
+        <location filename="../app/aboutdialog.cpp" line="49"/>
         <source>Logo designed by %1</source>
         <translation>Logo 由 %1 设计</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="51"/>
+        <location filename="../app/aboutdialog.cpp" line="51"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>使用 Qt %1 (%2) 进行构建</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="52"/>
+        <location filename="../app/aboutdialog.cpp" line="52"/>
         <source>Source code</source>
         <translation>源代码</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="58"/>
+        <location filename="../app/aboutdialog.cpp" line="58"/>
         <source>Contributors</source>
         <translation>贡献者</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../app/aboutdialog.cpp" line="60"/>
         <source>List of contributors on GitHub</source>
         <translation>GitHub 上的贡献者列表</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="61"/>
+        <location filename="../app/aboutdialog.cpp" line="61"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>感谢所有参与此项目的朋友。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="65"/>
+        <location filename="../app/aboutdialog.cpp" line="65"/>
         <source>Translators</source>
         <translation>翻译者</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="66"/>
+        <location filename="../app/aboutdialog.cpp" line="66"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>我想要感谢下列自愿参与翻译此应用程序的朋友。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="131"/>
+        <location filename="../app/aboutdialog.cpp" line="131"/>
         <source>&amp;Special Thanks</source>
         <translation>致谢(&amp;S)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="133"/>
+        <location filename="../app/aboutdialog.cpp" line="133"/>
         <source>&amp;Third-party Libraries</source>
         <translation>第三方程序库(&amp;T)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="72"/>
+        <location filename="../app/aboutdialog.cpp" line="72"/>
         <source>Your Rights</source>
         <translation>用户的权利</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="74"/>
+        <location filename="../app/aboutdialog.cpp" line="74"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 是在 MIT 许可协议下发布的。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../app/aboutdialog.cpp" line="75"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>此许可证赋予人们以下自由的权利：</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../app/aboutdialog.cpp" line="76"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>任何人都可以为了任何目的自由地使用 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="77"/>
+        <location filename="../app/aboutdialog.cpp" line="77"/>
         <source>You are free to distribute %1</source>
         <translation>任何人都可以自由地分发 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="78"/>
+        <location filename="../app/aboutdialog.cpp" line="78"/>
         <source>You can study how %1 works and change it</source>
         <translation>任何人都可以自由地研究 %1 的工作原理并对其进行修改</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="79"/>
+        <location filename="../app/aboutdialog.cpp" line="79"/>
         <source>You can distribute changed versions of %1</source>
         <translation>任何人都可以自由地分发修改过的 %1 版本</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../app/aboutdialog.cpp" line="81"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>此软件通过 MIT 许可证赋予用户上述自由，任何人无权剥夺。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="109"/>
+        <location filename="../app/aboutdialog.cpp" line="109"/>
         <source>Third-party Libraries used by %1</source>
         <translation>%1 使用的第三方程序库</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="110"/>
+        <location filename="../app/aboutdialog.cpp" line="110"/>
         <source>%1 is built on the following free software libraries:</source>
         <translation>%1 采用了下列自由软件程序库进行构建：</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="129"/>
+        <location filename="../app/aboutdialog.cpp" line="129"/>
         <source>&amp;Help</source>
         <translation>帮助(&amp;H)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="130"/>
+        <location filename="../app/aboutdialog.cpp" line="130"/>
         <source>&amp;About</source>
         <translation>关于(&amp;A)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="132"/>
+        <location filename="../app/aboutdialog.cpp" line="132"/>
         <source>&amp;License</source>
         <translation>软件许可证(&amp;L)</translation>
     </message>
@@ -162,7 +162,7 @@
 <context>
     <name>GraphicsScene</name>
     <message>
-        <location filename="../graphicsscene.cpp" line="16"/>
+        <location filename="../app/graphicsscene.cpp" line="16"/>
         <source>Drag image here</source>
         <translation>拖放图片至此</translation>
     </message>
@@ -170,22 +170,28 @@
 <context>
     <name>GraphicsView</name>
     <message>
-        <location filename="../graphicsview.cpp" line="254"/>
+        <location filename="../app/graphicsview.cpp" line="261"/>
         <source>File url list is empty</source>
         <translation>文件 URL 列表为空</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="53"/>
+        <location filename="../app/graphicsview.cpp" line="53"/>
         <source>File is not a valid image</source>
         <translation>文件不是有效的图片文件</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="262"/>
+        <location filename="../app/graphicsview.cpp" line="55"/>
+        <location filename="../app/graphicsview.cpp" line="59"/>
+        <source>Image data is invalid or currently unsupported</source>
+        <translation>图像数据无效或暂未支持</translation>
+    </message>
+    <message>
+        <location filename="../app/graphicsview.cpp" line="269"/>
         <source>Image data is invalid</source>
         <translation>图片数据无效</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="269"/>
+        <location filename="../app/graphicsview.cpp" line="276"/>
         <source>Not supported mimedata: %1</source>
         <translation>不受支持的 MimeData 格式：%1</translation>
     </message>
@@ -193,87 +199,210 @@
 <context>
     <name>MainWindow</name>
     <message>
-        <location filename="../mainwindow.cpp" line="175"/>
+        <location filename="../app/mainwindow.cpp" line="178"/>
         <source>File url list is empty</source>
         <translation>文件 URL 列表为空</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="408"/>
+        <location filename="../app/mainwindow.cpp" line="417"/>
         <source>&amp;Copy</source>
         <translation>复制(&amp;C)</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="429"/>
+        <location filename="../app/mainwindow.cpp" line="438"/>
         <source>Copy P&amp;ixmap</source>
         <translation>复制位图(&amp;I)</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="434"/>
+        <location filename="../app/mainwindow.cpp" line="443"/>
         <source>Copy &amp;File Path</source>
         <translation>复制文件路径(&amp;F)</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="444"/>
+        <location filename="../app/mainwindow.cpp" line="453"/>
         <source>&amp;Paste Image</source>
         <translation>粘贴图像(&amp;P)</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="450"/>
+        <location filename="../app/mainwindow.cpp" line="459"/>
         <source>&amp;Paste Image File</source>
         <translation>粘贴图像文件(&amp;P)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="30"/>
-        <location filename="../mainwindow.cpp" line="455"/>
+        <location filename="../app/mainwindow.cpp" line="492"/>
+        <source>Properties</source>
+        <translation>属性</translation>
+    </message>
+    <message>
+        <location filename="../app/aboutdialog.cpp" line="30"/>
+        <location filename="../app/mainwindow.cpp" line="464"/>
         <source>Stay on top</source>
         <translation>总在最前</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="34"/>
-        <location filename="../mainwindow.cpp" line="462"/>
+        <location filename="../app/aboutdialog.cpp" line="34"/>
+        <location filename="../app/mainwindow.cpp" line="471"/>
         <source>Protected mode</source>
         <translation>保护模式</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="469"/>
+        <location filename="../app/mainwindow.cpp" line="478"/>
         <source>Configure...</source>
         <translation>设置...</translation>
     </message>
     <message>
-        <location filename="../mainwindow.cpp" line="476"/>
+        <location filename="../app/mainwindow.cpp" line="485"/>
         <source>Help</source>
         <translation>帮助</translation>
     </message>
 </context>
+<context>
+    <name>MetadataDialog</name>
+    <message>
+        <location filename="../app/metadatadialog.cpp" line="75"/>
+        <source>Image Metadata</source>
+        <translation>图像元信息</translation>
+    </message>
+</context>
+<context>
+    <name>MetadataModel</name>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="36"/>
+        <source>Origin</source>
+        <comment>Section name.</comment>
+        <translation>来源</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="38"/>
+        <source>Image</source>
+        <comment>Section name.</comment>
+        <translation>图像</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="44"/>
+        <source>File</source>
+        <comment>Section name.</comment>
+        <translation>文件</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="40"/>
+        <source>Camera</source>
+        <comment>Section name.</comment>
+        <translation>照相机</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="27"/>
+        <source>%1 File</source>
+        <translation>%1 文件</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="35"/>
+        <source>Description</source>
+        <comment>Section name.</comment>
+        <translation>说明</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="41"/>
+        <source>Advanced photo</source>
+        <comment>Section name.</comment>
+        <translation>高级照片</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="42"/>
+        <source>GPS</source>
+        <comment>Section name.</comment>
+        <translation>GPS</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="47"/>
+        <source>Dimensions</source>
+        <translation>分辨率</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="49"/>
+        <source>Aspect Ratio</source>
+        <translation>纵横比</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="52"/>
+        <source>Name</source>
+        <translation>名称</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="54"/>
+        <source>Item type</source>
+        <translation>项目类型</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="56"/>
+        <source>Folder path</source>
+        <translation>文件夹路径</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="58"/>
+        <source>Size</source>
+        <translation>大小</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="60"/>
+        <source>Date Created</source>
+        <translation>创建日期</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="62"/>
+        <source>Date Modified</source>
+        <translation>修改日期</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="70"/>
+        <source>%1 x %2</source>
+        <translation>%1 x %2</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="88"/>
+        <source>%1 : %2</source>
+        <translation>%1 : %2</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="204"/>
+        <source>Property</source>
+        <translation>属性</translation>
+    </message>
+    <message>
+        <location filename="../app/metadatamodel.cpp" line="204"/>
+        <source>Value</source>
+        <translation>值</translation>
+    </message>
+</context>
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="15"/>
+        <location filename="../app/settingsdialog.cpp" line="15"/>
         <source>Settings</source>
         <translation>设定</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="20"/>
+        <location filename="../app/settingsdialog.cpp" line="20"/>
         <source>Do nothing</source>
         <translation>什么也不做</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="21"/>
+        <location filename="../app/settingsdialog.cpp" line="21"/>
         <source>Close the window</source>
         <translation>关闭窗口</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../app/settingsdialog.cpp" line="22"/>
         <source>Toggle maximize</source>
         <translation>最大化窗口</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="30"/>
+        <location filename="../app/settingsdialog.cpp" line="30"/>
         <source>Stay on top when start-up</source>
         <translation>启动时保持窗口总在最前</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="31"/>
+        <location filename="../app/settingsdialog.cpp" line="31"/>
         <source>Double-click behavior</source>
         <translation>双击时的行为</translation>
     </message>
@@ -281,12 +410,12 @@
 <context>
     <name>main</name>
     <message>
-        <location filename="../main.cpp" line="27"/>
+        <location filename="../app/main.cpp" line="27"/>
         <source>Pineapple Pictures</source>
         <translation>菠萝看图</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="31"/>
+        <location filename="../app/main.cpp" line="31"/>
         <source>File list.</source>
         <translation>文件列表。</translation>
     </message>