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module/Tree_Table/main.cpp

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+#ifndef CUSTOMMODEL_H
+#define CUSTOMMODEL_H
+
+#include <QAbstractTableModel>
+#include <QVector>
+#include <QString>
+#include <QStyledItemDelegate>
+#include <QTableView>
+#include <QMainWindow>
+#include <QApplication>
+#include <QHeaderView>
+#include <QPainter>
+
+
+
+class CustomModel : public QAbstractTableModel {
+public:
+    explicit CustomModel(QObject *parent = nullptr);
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
+private:
+    QVector<QVector<QString>> tableData;
+};
+
+class CustomTableDelegate : public QStyledItemDelegate {
+public:
+    explicit CustomTableDelegate(QObject *parent = nullptr);
+    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
+};
+
+
+class CustomTableView : public QTableView {
+public:
+    explicit CustomTableView(QWidget *parent = nullptr);
+};
+
+
+
+
+
+#endif // CUSTOMMODEL_H
+
+
+CustomModel::CustomModel(QObject *parent)
+    : QAbstractTableModel(parent) {
+    tableData = {
+        {"Item 1-1", "Item 1-2", "Item 1-3"},
+        {"Item 2-1", "Item 2-2", "Item 2-3"},
+        {"Item 3-1", "Item 3-2", "Item 3-3"}
+    };
+}
+
+int CustomModel::rowCount(const QModelIndex &) const {
+    return tableData.size();
+}
+
+int CustomModel::columnCount(const QModelIndex &) const {
+    return tableData.isEmpty() ? 0 : tableData[0].size();
+}
+
+QVariant CustomModel::data(const QModelIndex &index, int role) const {
+    if (!index.isValid())
+        return QVariant();
+
+    if (role == Qt::DisplayRole || role == Qt::EditRole) {
+        return tableData[index.row()][index.column()];
+    }
+
+    return QVariant();
+}
+
+bool CustomModel::setData(const QModelIndex &index, const QVariant &value, int role) {
+    if (index.isValid() && role == Qt::EditRole) {
+        tableData[index.row()][index.column()] = value.toString();
+        emit dataChanged(index, index);
+        return true;
+    }
+    return false;
+}
+
+Qt::ItemFlags CustomModel::flags(const QModelIndex &index) const {
+    if (!index.isValid())
+        return Qt::NoItemFlags;
+
+    return Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsEnabled;
+}
+CustomTableDelegate::CustomTableDelegate(QObject *parent) : QStyledItemDelegate(parent) {}
+
+void CustomTableDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const {
+    painter->save();
+
+    if (index.row() % 2 == 0) {
+        painter->fillRect(option.rect, QColor(220, 220, 220));
+    } else {
+        painter->fillRect(option.rect, Qt::white);
+    }
+
+    painter->drawText(option.rect, Qt::AlignCenter, index.data().toString());
+
+    painter->restore();
+}
+
+CustomTableView::CustomTableView(QWidget *parent) : QTableView(parent) {
+    setAlternatingRowColors(true);
+    setSelectionBehavior(QAbstractItemView::SelectRows);
+    setSelectionMode(QAbstractItemView::SingleSelection);
+    horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
+}
+
+
+
+int main(int argc, char *argv[]) {
+    QApplication app(argc, argv);
+
+    auto *tableView = new CustomTableView;
+    auto *model = new CustomModel(tableView);
+    auto *delegate = new CustomTableDelegate(tableView);
+
+    tableView->setModel(model);
+    tableView->setItemDelegate(delegate);
+
+    tableView->show();
+
+
+    return app.exec();
+}