feat: 创建UI和实现init()函数，文件内容值到QTableView和QStandardItemModel里面

QtQStandardItemModelEx/ExQStandardItemModel.h

@@ -0,0 +1,40 @@
+#ifndef EXQSTANDARDITEMMODEL_H
+#define EXQSTANDARDITEMMODEL_H
+
+#include <QMainWindow>
+#include <QLabel>
+#include <QStandardItemModel>
+#include <QItemSelectionModel>
+
+namespace Ui {
+class ExQStandardItemModel;
+}
+
+class ExQStandardItemModel : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit ExQStandardItemModel(QWidget *parent = nullptr);
+    ~ExQStandardItemModel();
+
+private:
+    void init(QStringList& list);          //从list初始化数据模型
+
+private slots:
+    void onCurrentChanged(const QModelIndex& current, const QModelIndex& previous);  //当前单元格发生变化时
+    void on_actOpen_triggered();           //打开和导入文件，并且在plainTextEdit里面显示
+    void on_actAppend_triggered();         //在表格的最后一行添加一行
+
+private:
+    Ui::ExQStandardItemModel *ui;
+
+    QLabel  *m_labCurrFile;                //当前文件
+    QLabel *m_labCellPos;                  //当前单元格行列号
+    QLabel *m_labCellText;                 //当前单元格数据内容
+    QStandardItemModel *m_model;           //数据模型
+    QItemSelectionModel *m_selectModet;    //选择模型
+
+};
+
+#endif // EXQSTANDARDITEMMODEL_H