WIP: properties dialog

.gitignore

@@ -1,6 +1,5 @@
 # User files
 *.user
-*.user.*
 
 # Translation files
 *.qm

CMakeLists.txt

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

@@ -1,101 +0,0 @@
-#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/metadatamodel.cpp

@@ -1,205 +0,0 @@
-#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

@@ -1,43 +0,0 @@
-#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

bottombuttongroup.cpp

@@ -33,7 +33,7 @@ BottomButtonGroup::BottomButtonGroup(QWidget *parent)
         QPushButton * btn = new QPushButton(QIcon(QStringLiteral(":/icons/") + text), "");
         btn->setIconSize(QSize(40, 40));
         btn->setFixedSize(40, 40);
-        QObject::connect(btn, &QAbstractButton::clicked, btn, func);
+        connect(btn, &QAbstractButton::clicked, btn, func);
         return btn;
     };
     addButton(newBtn("zoom-original", [this]() {

dist/appstream/net.blumia.pineapple-pictures.appdata.xml

@@ -2,7 +2,7 @@
 <component type="desktop-application">
   <id>net.blumia.pineapple-pictures</id>
   <metadata_license>CC0-1.0</metadata_license>
-  <project_license>MIT</project_license>
+  <project_license>GPL-3.0+</project_license>
   <name>Pineapple Pictures</name>
   <name xml:lang="zh-CN">菠萝看图</name>
   <summary>Image Viewer</summary>

graphicsview.cpp

@@ -51,15 +51,8 @@ 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 {
-            const QPixmap & pixmap = QPixmap::fromImageReader(&imageReader);
-            if (pixmap.isNull()) {
-                showText(tr("Image data is invalid or currently unsupported"));
-            } else {
-                showImage(pixmap);
-            }
+            showImage(QPixmap::fromImageReader(&imageReader));
         }
     }
 

languages/PineapplePictures.ts

@@ -0,0 +1,294 @@
+<?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>

languages/PineapplePictures_zh_CN.ts

@@ -4,157 +4,157 @@
 <context>
     <name>AboutDialog</name>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="22"/>
+        <location filename="../aboutdialog.cpp" line="22"/>
         <source>About</source>
         <translation>关于</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="25"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="26"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="27"/>
+        <location filename="../aboutdialog.cpp" line="27"/>
         <source>Context menu option explanation:</source>
         <translation>菜单项说明：</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="31"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="35"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="44"/>
+        <location filename="../aboutdialog.cpp" line="44"/>
         <source>Version: %1</source>
         <translation>版本: %1</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="47"/>
+        <location filename="../aboutdialog.cpp" line="47"/>
         <source>Copyright (c) 2020 %1</source>
         <translation>版权所有 (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="49"/>
+        <location filename="../aboutdialog.cpp" line="49"/>
         <source>Logo designed by %1</source>
         <translation>Logo 由 %1 设计</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="51"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="52"/>
+        <location filename="../aboutdialog.cpp" line="52"/>
         <source>Source code</source>
         <translation>源代码</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="58"/>
+        <location filename="../aboutdialog.cpp" line="58"/>
         <source>Contributors</source>
         <translation>贡献者</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="60"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="61"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="65"/>
+        <location filename="../aboutdialog.cpp" line="65"/>
         <source>Translators</source>
         <translation>翻译者</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="66"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="131"/>
+        <location filename="../aboutdialog.cpp" line="131"/>
         <source>&amp;Special Thanks</source>
         <translation>致谢(&amp;S)</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="133"/>
+        <location filename="../aboutdialog.cpp" line="133"/>
         <source>&amp;Third-party Libraries</source>
         <translation>第三方程序库(&amp;T)</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="72"/>
+        <location filename="../aboutdialog.cpp" line="72"/>
         <source>Your Rights</source>
         <translation>用户的权利</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="74"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="75"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="76"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="77"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="78"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="79"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="81"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="109"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="110"/>
+        <location filename="../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="../app/aboutdialog.cpp" line="129"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>&amp;Help</source>
         <translation>帮助(&amp;H)</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="130"/>
+        <location filename="../aboutdialog.cpp" line="130"/>
         <source>&amp;About</source>
         <translation>关于(&amp;A)</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="132"/>
+        <location filename="../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="../app/graphicsscene.cpp" line="16"/>
+        <location filename="../graphicsscene.cpp" line="16"/>
         <source>Drag image here</source>
         <translation>拖放图片至此</translation>
     </message>
@@ -170,28 +170,22 @@
 <context>
     <name>GraphicsView</name>
     <message>
-        <location filename="../app/graphicsview.cpp" line="261"/>
+        <location filename="../graphicsview.cpp" line="254"/>
         <source>File url list is empty</source>
         <translation>文件 URL 列表为空</translation>
     </message>
     <message>
-        <location filename="../app/graphicsview.cpp" line="53"/>
+        <location filename="../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="../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"/>
+        <location filename="../graphicsview.cpp" line="262"/>
         <source>Image data is invalid</source>
         <translation>图片数据无效</translation>
     </message>
     <message>
-        <location filename="../app/graphicsview.cpp" line="276"/>
+        <location filename="../graphicsview.cpp" line="269"/>
         <source>Not supported mimedata: %1</source>
         <translation>不受支持的 MimeData 格式：%1</translation>
     </message>
@@ -199,210 +193,87 @@
 <context>
     <name>MainWindow</name>
     <message>
-        <location filename="../app/mainwindow.cpp" line="178"/>
+        <location filename="../mainwindow.cpp" line="175"/>
         <source>File url list is empty</source>
         <translation>文件 URL 列表为空</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="417"/>
+        <location filename="../mainwindow.cpp" line="408"/>
         <source>&amp;Copy</source>
         <translation>复制(&amp;C)</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="438"/>
+        <location filename="../mainwindow.cpp" line="429"/>
         <source>Copy P&amp;ixmap</source>
         <translation>复制位图(&amp;I)</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="443"/>
+        <location filename="../mainwindow.cpp" line="434"/>
         <source>Copy &amp;File Path</source>
         <translation>复制文件路径(&amp;F)</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="453"/>
+        <location filename="../mainwindow.cpp" line="444"/>
         <source>&amp;Paste Image</source>
         <translation>粘贴图像(&amp;P)</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="459"/>
+        <location filename="../mainwindow.cpp" line="450"/>
         <source>&amp;Paste Image File</source>
         <translation>粘贴图像文件(&amp;P)</translation>
     </message>
     <message>
-        <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"/>
+        <location filename="../aboutdialog.cpp" line="30"/>
+        <location filename="../mainwindow.cpp" line="455"/>
         <source>Stay on top</source>
         <translation>总在最前</translation>
     </message>
     <message>
-        <location filename="../app/aboutdialog.cpp" line="34"/>
-        <location filename="../app/mainwindow.cpp" line="471"/>
+        <location filename="../aboutdialog.cpp" line="34"/>
+        <location filename="../mainwindow.cpp" line="462"/>
         <source>Protected mode</source>
         <translation>保护模式</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="478"/>
+        <location filename="../mainwindow.cpp" line="469"/>
         <source>Configure...</source>
         <translation>设置...</translation>
     </message>
     <message>
-        <location filename="../app/mainwindow.cpp" line="485"/>
+        <location filename="../mainwindow.cpp" line="476"/>
         <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="../app/settingsdialog.cpp" line="15"/>
+        <location filename="../settingsdialog.cpp" line="15"/>
         <source>Settings</source>
         <translation>设定</translation>
     </message>
     <message>
-        <location filename="../app/settingsdialog.cpp" line="20"/>
+        <location filename="../settingsdialog.cpp" line="20"/>
         <source>Do nothing</source>
         <translation>什么也不做</translation>
     </message>
     <message>
-        <location filename="../app/settingsdialog.cpp" line="21"/>
+        <location filename="../settingsdialog.cpp" line="21"/>
         <source>Close the window</source>
         <translation>关闭窗口</translation>
     </message>
     <message>
-        <location filename="../app/settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="22"/>
         <source>Toggle maximize</source>
         <translation>最大化窗口</translation>
     </message>
     <message>
-        <location filename="../app/settingsdialog.cpp" line="30"/>
+        <location filename="../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="../app/settingsdialog.cpp" line="31"/>
+        <location filename="../settingsdialog.cpp" line="31"/>
         <source>Double-click behavior</source>
         <translation>双击时的行为</translation>
     </message>
@@ -410,12 +281,12 @@
 <context>
     <name>main</name>
     <message>
-        <location filename="../app/main.cpp" line="27"/>
+        <location filename="../main.cpp" line="27"/>
         <source>Pineapple Pictures</source>
         <translation>菠萝看图</translation>
     </message>
     <message>
-        <location filename="../app/main.cpp" line="31"/>
+        <location filename="../main.cpp" line="31"/>
         <source>File list.</source>
         <translation>文件列表。</translation>
     </message>

mainwindow.cpp

@@ -8,8 +8,8 @@
 #include "graphicsscene.h"
 #include "settingsdialog.h"
 #include "aboutdialog.h"
-#include "metadatamodel.h"
 #include "metadatadialog.h"
+#include "metadatamodel.h"
 
 #include <QMouseEvent>
 #include <QMovie>
@@ -24,7 +24,6 @@
 #include <QCollator>
 #include <QClipboard>
 #include <QMimeData>
-#include <QWindow>
 
 #ifdef _WIN32
 #include <windows.h>
@@ -342,13 +341,7 @@ void MainWindow::mousePressEvent(QMouseEvent *event)
 void MainWindow::mouseMoveEvent(QMouseEvent *event)
 {
     if (event->buttons() & Qt::LeftButton && m_clickedOnWindow && !isMaximized()) {
-#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
-        if (!window()->windowHandle()->startSystemMove()) {
-            move(event->globalPos() - m_oldMousePos);
-        }
-#else
         move(event->globalPos() - m_oldMousePos);
-#endif // QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
         event->accept();
     }
 

metadata.cpp

@@ -0,0 +1,81 @@
+#include "metadata.h"
+
+Section::Section()
+{
+
+}
+
+Section::~Section()
+{
+
+}
+
+// Warning! this method won't copy anything from the given argument!
+// we actually doesn't care about this, but since QList and QMap are not movable
+// so there won't be a (not ill-formed) default ctor to use and we won't get a
+// proper copy ctor, thus the operator= will be deleted.
+// When accessing QMap value if not exist, we just use this to create a new Section.
+Section & Section::operator=(const Section &)
+{
+    return *this;
+}
+
+int Section::count() const
+{
+    return m_propertiesValueMap.count();
+}
+
+void Section::setSectionName(const QString &displayName)
+{
+    m_displayName = displayName;
+}
+
+void Section::setValue(PropertyType type, const QString &value)
+{
+    if (!m_propertiesValueMap.contains(type)) {
+        m_propertyIndexes.append(type);
+    }
+
+    m_propertiesValueMap[type] = value;
+}
+
+QString Section::valueAt(int index) const
+{
+    Q_ASSERT(index >= 0 && index < m_propertyIndexes.count());
+
+    return m_propertiesValueMap[m_propertyIndexes[index]];
+}
+
+QString Section::value(Section::PropertyType type) const
+{
+    return m_propertiesValueMap.value(type, tr("Unknown"));
+}
+
+QString Section::propertyName(PropertyType type) const
+{
+    return m_propertiesOverrideDisplayNameMap.value(
+                type,
+                m_builtinPropDisplayNameMap.value(type, tr("Unknown"))
+           );
+}
+
+Metadata::Metadata()
+{
+
+}
+
+Metadata::~Metadata()
+{
+
+}
+
+void Metadata::setSectionName(SectionType type, const QString &displayName)
+{
+    m_sections[type].setSectionName(displayName);
+}
+
+void Metadata::setPropertyValue(Metadata::SectionType type, Section::PropertyType propType, QString value)
+{
+    m_sections[type].setValue(propType, value);
+}
+

metadata.h

@@ -0,0 +1,66 @@
+#ifndef METADATA_H
+#define METADATA_H
+
+#include <QMap>
+#include <QPair>
+#include <QCoreApplication>
+
+class Section
+{
+    Q_DECLARE_TR_FUNCTIONS(Section)
+public:
+    Section();
+    ~Section();
+    Section & operator=(const Section& other);
+
+    // TODO: maybe use QString instead of a enum? different section won't share a same
+    //       enum value in any way...
+    enum PropertyType : int {
+        NameProp,
+        FileSizeProp,
+        LastModifiedProp,
+        ImageSizeProp,
+    };
+
+    int count() const;
+    void setSectionName(const QString & displayName);
+    void setValue(PropertyType type, const QString & value);
+    QString value(PropertyType type) const;
+    QString valueAt(int index) const;
+    QString propertyName(PropertyType type) const;
+
+private:
+    QString m_displayName;
+    QList<PropertyType> m_propertyIndexes;
+    QMap<PropertyType, QString> m_propertiesValueMap;
+    QMap<PropertyType, QString> m_propertiesOverrideDisplayNameMap;
+
+    const QMap<PropertyType, QString> m_builtinPropDisplayNameMap {
+        {NameProp, tr("Name")},
+        {FileSizeProp, tr("File Size")},
+        {LastModifiedProp, tr("Last Modified")},
+        {ImageSizeProp, tr("Image Size")},
+    };
+};
+
+class Metadata
+{
+public:
+    enum SectionType : int {
+        GeneralSection,
+        ExifSection,
+    };
+
+    Metadata();
+    ~Metadata();
+
+private:
+    QList<SectionType> m_sectionIndexes;
+    QMap<SectionType, Section> m_sections;
+
+    void setSectionName(SectionType type, const QString & displayName);
+    void setPropertyValue(SectionType type, Section::PropertyType propType, QString value);
+
+};
+
+#endif // METADATA_H

metadatadialog.cpp

@@ -0,0 +1,41 @@
+#include "metadatadialog.h"
+
+#include <QDialogButtonBox>
+#include <QTreeView>
+#include <QVBoxLayout>
+
+#include "metadatamodel.h"
+
+MetadataDialog::MetadataDialog(QWidget *parent)
+    : QDialog(parent)
+    , m_treeView(new QTreeView(this))
+{
+//    m_treeView->setRootIsDecorated(false);
+    m_treeView->setIndentation(0);
+
+    setWindowTitle(tr("Image Metadata"));
+
+    QDialogButtonBox * buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
+
+    setLayout(new QVBoxLayout);
+    layout()->addWidget(m_treeView);
+    layout()->addWidget(buttonBox);
+
+    connect(buttonBox, &QDialogButtonBox::close, this, &QDialog::close);
+}
+
+MetadataDialog::~MetadataDialog()
+{
+
+}
+
+void MetadataDialog::setMetadataModel(MetadataModel * model)
+{
+    m_treeView->setModel(model);
+    m_treeView->expandAll();
+}
+
+QSize MetadataDialog::sizeHint() const
+{
+    return QSize(520, 350);
+}

metadatamodel.cpp

@@ -0,0 +1,267 @@
+#include "metadatamodel.h"
+
+#include <QFileInfo>
+#include <QDateTime>
+#include <QLocale>
+#include <QSize>
+#include <QImageReader>
+
+// This model is very similar to imagemetainfomodel.cpp in
+// Gwenview, since We don't care about ABI here and we won't
+// have any KDE lib as dept (KIO is a tier 3 framework from
+// KDE for example) which might cause this project no longer
+// tiny and easy to maintain, I'll just create a simpler
+// implementation than do a simple copy-paste...
+
+enum Sections : int {
+    GeneralSection,
+    ExifSection,
+    CustomSection = 61,
+};
+
+class MetadataSection
+{
+public:
+    class Entry
+    {
+    public:
+        // key: for internal indexing.
+        // label: display name of the key.
+        Entry(const QString & key, const QString & label, const QString & value)
+            : m_key(key)
+            , m_label(label.trimmed())
+            , m_value(value.trimmed())
+        {}
+
+        QString m_key;
+        QString m_label;
+        QString m_value;
+    };
+
+    MetadataSection(const QString & sectionName)
+        : m_sectionName(sectionName)
+    {}
+
+    ~MetadataSection()
+    {
+        qDeleteAll(m_entries);
+    }
+
+    void clear()
+    {
+        qDeleteAll(m_entries);
+        m_entries.clear();
+    }
+
+    void addEnrty(const QString & key, const QString & label, const QString & value = QString())
+    {
+        Entry * e = new Entry(key, label, value);
+        m_entries << e;
+        m_keyEntryMap[e->m_key] = m_entries.size() - 1;
+    }
+
+    QString keyAt(int index) const
+    {
+        Q_ASSERT(index < m_entries.size());
+        return m_entries[index]->m_key;
+    }
+
+    QString valueAt(int index) const
+    {
+        Q_ASSERT(index < m_entries.size());
+        return m_entries[index]->m_value;
+    }
+
+    void setValueAt(int index, const QString & value)
+    {
+        Q_ASSERT(index < m_entries.size());
+        m_entries[index]->m_value = value;
+    }
+
+    QString labelAt(int index) const
+    {
+        Q_ASSERT(index < m_entries.size());
+        return m_entries[index]->m_label;
+    }
+
+    int keyIndex(const QString & key) {
+        return m_keyEntryMap.value(key, -1);
+    }
+
+    QString sectionName() const
+    {
+        return m_sectionName;
+    }
+
+    int size() const
+    {
+        return m_entries.size();
+    }
+
+private:
+    QList<Entry*> m_entries;
+    QHash<QString, int> m_keyEntryMap;
+    QString m_sectionName;
+};
+
+MetadataModel::MetadataModel()
+{
+    sectionRegister(GeneralSection, new MetadataSection(tr("General", "General info about the image, section name in metadata dialog")));
+
+    initGeneralSection();
+}
+
+MetadataModel::~MetadataModel()
+{
+    qDeleteAll(m_sections);
+}
+
+void MetadataModel::setFile(const QString &path)
+{
+    QFileInfo fileInfo(path);
+    const QString sizeString = QLocale().formattedDataSize(fileInfo.size());
+    const QString timeString = QLocale().toString(fileInfo.lastModified(), QLocale::LongFormat);
+
+    // FIXME: this implementation is very dirty!
+    QImageReader imgReader(path);
+    setImageSize(imgReader.size());
+
+    setSectionEntryValue(GeneralSection, QStringLiteral("General.Name"), fileInfo.fileName());
+    setSectionEntryValue(GeneralSection, QStringLiteral("General.Size"), sizeString);
+    setSectionEntryValue(GeneralSection, QStringLiteral("General.Time"), timeString);
+}
+
+void MetadataModel::setImageSize(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('-');
+    }
+
+    setSectionEntryValue(GeneralSection, QStringLiteral("General.ImageSize"), imageSize);
+}
+
+QModelIndex MetadataModel::index(int row, int col, const QModelIndex &parent) const
+{
+    if (col < 0 || col > 1) {
+        return QModelIndex();
+    }
+    if (!parent.isValid()) {
+        // This is a group
+        if (row < 0 || row >= m_sections.size()) {
+            return QModelIndex();
+        }
+        return createIndex(row, col, col == 0 ? 2 : 3); // ????????
+    } else {
+        // This is an entry
+        int group = parent.row();
+        if (row < 0 || row >= m_sections[group]->size()) {
+            return QModelIndex();
+        }
+        return createIndex(row, col, static_cast<quintptr>(group));
+    }
+}
+
+QModelIndex MetadataModel::parent(const QModelIndex & index) const
+{
+    if (!index.isValid()) {
+        return QModelIndex();
+    }
+    if (index.internalId() == 2 || index.internalId() == 3) {
+        return QModelIndex();
+    } else {
+        return createIndex(static_cast<int>(index.internalId()), 0, 2);
+    }
+}
+
+int MetadataModel::rowCount(const QModelIndex & parent) const
+{
+    if (!parent.isValid()) {
+        return m_sections.size();
+    } else if (parent.internalId() == 2) {
+        return m_sections[parent.row()]->size();
+    } else {
+        return 0;
+    }
+}
+
+int MetadataModel::columnCount(const QModelIndex &) const
+{
+    return 2;
+}
+
+QVariant MetadataModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid()) {
+        return QVariant();
+    }
+
+    switch (role) {
+    case Qt::DisplayRole:
+        return displayData(index);
+    default:
+        return QVariant();
+    }
+}
+
+void MetadataModel::initGeneralSection()
+{
+    MetadataSection * s = section(GeneralSection);
+
+    s->addEnrty(QStringLiteral("General.Name"), tr("File Name"));
+    s->addEnrty(QStringLiteral("General.Size"), tr("File Size"));
+    s->addEnrty(QStringLiteral("General.Time"), tr("Last Modified"));
+    s->addEnrty(QStringLiteral("General.ImageSize"), tr("Image Size"));
+}
+
+bool MetadataModel::sectionRegister(Sections sectionType, MetadataSection *section)
+{
+    if (m_sectionEnumIndexMap.contains(sectionType)) {
+        return false;
+    }
+    m_sections.append(section);
+    m_sectionEnumIndexMap[sectionType] = section;
+
+    return true;
+}
+
+void MetadataModel::setSectionEntryValue(Sections sectionType, const QString &key, const QString &value)
+{
+    MetadataSection * s = section(sectionType);
+    int entryIndex = s->keyIndex(key);
+    if (entryIndex < 0) {
+        // no such entry
+        return;
+    }
+    s->setValueAt(entryIndex, value);
+}
+
+MetadataSection *MetadataModel::section(Sections sectionType)
+{
+    return m_sectionEnumIndexMap[sectionType];
+}
+
+QVariant MetadataModel::displayData(const QModelIndex &index) const
+{
+    if (index.internalId() == 2) {
+        if (index.column() != 0) {
+            return QVariant();
+        }
+        QString label = m_sections[index.row()]->sectionName();
+        return QVariant(label);
+    }
+
+    if (index.internalId() == 3) {
+        return QString();
+    }
+
+    MetadataSection* group = m_sections[index.internalId()];
+    if (index.column() == 0) {
+        return group->labelAt(index.row());
+    } else {
+        return group->valueAt(index.row());
+    }
+}

metadatamodel.h

@@ -0,0 +1,36 @@
+#ifndef METADATAMODEL_H
+#define METADATAMODEL_H
+
+#include <QVector>
+#include <QAbstractItemModel>
+
+enum Sections : int;
+class MetadataSection;
+class MetadataModel : public QAbstractItemModel
+{
+    Q_OBJECT
+public:
+    MetadataModel();
+    ~MetadataModel() override;
+
+    void setFile(const QString & url);
+    void setImageSize(const QSize & size);
+
+    QModelIndex index(int row, int col, const QModelIndex& parent = QModelIndex()) const override;
+    QModelIndex parent(const QModelIndex & index) 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;
+
+private:
+    QList<MetadataSection *> m_sections; // associated pointers free at destructor function.
+    QMap<Sections, MetadataSection *> m_sectionEnumIndexMap; // pointer shared with m_sections
+
+    void initGeneralSection();
+    bool sectionRegister(Sections sectionType, MetadataSection * section);
+    void setSectionEntryValue(Sections sectionType, const QString & key, const QString & value);
+    MetadataSection * section(Sections sectionType);
+    QVariant displayData(const QModelIndex & index) const;
+};
+
+#endif // METADATAMODEL_H

pineapple-pictures.pro

@@ -1,3 +1,9 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2019-09-26T23:36:07
+#
+#-------------------------------------------------
+
 QT       += core widgets gui svg
 
 TARGET = ppic
@@ -17,37 +23,39 @@ DEFINES += QT_DEPRECATED_WARNINGS
 CONFIG += c++11 lrelease embed_translations
 
 SOURCES += \
-    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
+    aboutdialog.cpp \
+        main.cpp \
+        mainwindow.cpp \
+    graphicsview.cpp \
+    bottombuttongroup.cpp \
+    graphicsscene.cpp \
+    metadata.cpp \
+    metadatadialog.cpp \
+    metadatamodel.cpp \
+    navigatorview.cpp \
+    opacityhelper.cpp \
+    toolbutton.cpp \
+    settings.cpp \
+    settingsdialog.cpp
 
 HEADERS += \
-    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
+    aboutdialog.h \
+        mainwindow.h \
+    graphicsview.h \
+    bottombuttongroup.h \
+    graphicsscene.h \
+    metadata.h \
+    metadatadialog.h \
+    metadatamodel.h \
+    navigatorview.h \
+    opacityhelper.h \
+    toolbutton.h \
+    settings.h \
+    settingsdialog.h
 
 TRANSLATIONS = \
-    translations/PineapplePictures.ts \
-    translations/PineapplePictures_zh_CN.ts
+    languages/PineapplePictures.ts \
+    languages/PineapplePictures_zh_CN.ts
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin

translations/PineapplePictures.ts

@@ -1,423 +0,0 @@
-<?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>
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