Qt自定义模型示例

#pragma once

#include <QAbstractTableModel>
#include <QVariant>

class MyTableModel :public QAbstractTableModel {
	Q_OBJECT
public:
	MyTableModel(QObject* parent = nullptr):QAbstractTableModel(parent){}
	int rowCount(const QModelIndex &parent = QModelIndex()) const override {
		return 5;
	}
	int columnCount(const QModelIndex &parent = QModelIndex()) const override {
		return 3;
	}
	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override {
		if (!index.isValid() || role != Qt::DisplayRole) {
			return QVariant();
		}
		return index.row() + index.column();
	}
};

#pragma once

#include <QtWidgets/QMainWindow>
#include "ui_QtWidgetsApplication1.h"
#include <QStandardItemModel>
#include <QItemSelectionModel>
#include "MyTableModel.hpp"

class QtWidgetsApplication1 : public QMainWindow
{
    Q_OBJECT

public:
    QtWidgetsApplication1(QWidget *parent = nullptr);
    ~QtWidgetsApplication1();

	MyTableModel myModel;

private:
    Ui::QtWidgetsApplication1Class ui;
};

#include "QtWidgetsApplication1.h"

QtWidgetsApplication1::QtWidgetsApplication1(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
	//为UI设置模型
	ui.tableView->setModel(&myModel);
}

QtWidgetsApplication1::~QtWidgetsApplication1()
{}

表格样式：

Qt模型中的role是用来在数据项（通常是表格模型中的单元格）上标识不同的数据信息的。每个数据项可以有多个role，每个role代表不同的数据信息，例如显示的文本、图标、背景色等。

在Qt中，通过Q