chore: adjusted the project directory structure

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);
+}