前言

最近了解了一下setProperty和property，突然萌生一个想法，之前写的代码有很大优化空间，就是控件可以绑定值了，我这里拿QTableWidget每一行绑定一个结构体写个demo演示一下，dddd！

一、绑定

结构体如下：

struct ST_Test
{
    char szName[256];
    int iLen;
    char c;
    char szPhone[32];

    ST_Test(){}
    ST_Test(char* pName, int len, char cc, char* pPhone)
    {
        strcpy(szName, pName);
        iLen = len;
        c = cc;
        strcpy(szPhone, pPhone);
    }
};

构造函数申明结构体链表：

m_listTest.append(new ST_Test{"Test001", 911, 8, "1234556789"});
m_listTest.append(new ST_Test{"Test002", 285, 9, "1234556780"});
m_listTest.append(new ST_Test{"Test003", 111, 10, "1234556781"});

保存结构体指针：

// 为了让QVariant识别自定义类型，需要Q_DECLARE_METATYPE宏来声明一下
Q_DECLARE_METATYPE(ST_Test*)

// 插入代码如下，QTableWidgetItem不是继承QObject的，需要借助QCheckBox控件实现，根据自己的需求定制，我是刚好需要用到QCheckBox
QCheckBox* cBox = nullptr;                                       
int iRow = ui->tableWidget->rowCount();                          
ui->tableWidget->insertRow(iRow);                                
cBox = new QCheckBox("1");                                       
ui->tableWidget->setCellWidget(iRow, 0,  cBox);                  
ui->tableWidget->setItem(iRow, 1,  new QTableWidgetItem("测试1")); 
ui->tableWidget->setItem(iRow, 2,  new QTableWidgetItem("Ok 1"));
cBox->setProperty("ST_Test", QVariant::fromValue(m_listTest[0]));
                                                                 
iRow = ui->tableWidget->rowCount();                              
ui->tableWidget->insertRow(iRow);                                
cBox = new QCheckBox("2");                                       
ui->tableWidget->setCellWidget(iRow, 0,  cBox);                  
ui->tableWidget->setItem(iRow, 1,  new QTableWidgetItem("测试2")); 
ui->tableWidget->setItem(iRow, 2,  new QTableWidgetItem("Ok 2"));
cBox->setProperty("ST_Test", QVariant::fromValue(m_listTest[1]));
                                                                 
iRow = ui->tableWidget->rowCount();                              
ui->tableWidget->insertRow(iRow);                                
cBox = new QCheckBox("3");                                       
ui->tableWidget->setCellWidget(iRow, 0,  cBox);                  
ui->tableWidget->setItem(iRow, 1,  new QTableWidgetItem("测试3")); 
ui->tableWidget->setItem(iRow, 2,  new QTableWidgetItem("Ok 3"));
cBox->setProperty("ST_Test", QVariant::fromValue(m_listTest[2]));

二、获取

代码如下（示例）：

QCheckBox* cBox = qobject_cast<QCheckBox*>(ui->tableWidget->cellWidget(0, 0));
if(cBox != nullptr)
{
	QVariant curData = cBox->property("ST_Test");
    if(curData.isNull())
    {
    	return;
    }

    ST_Test* pTest = curData.value<ST_Test*>();
    qDebug() << cBox->text() << " " << pTest->szName << " " << pTest->iLen << " " << pTest->c << " " << pTest->szPhone;
}

cBox = qobject_cast<QCheckBox*>(ui->tableWidget->cellWidget(1, 0));
if(cBox != nullptr)
{
 	QVariant curData = cBox->property("ST_Test");
    if(curData.isNull())
    {
    	return;
    }

    ST_Test* pTest = curData.value<ST_Test*>();
    qDebug() << cBox->text() << " " << pTest->szName << " " << pTest->iLen << " " << pTest->c << " " << pTest->szPhone;
}

cBox = qobject_cast<QCheckBox*>(ui->tableWidget->cellWidget(2, 0));
if(cBox != nullptr)
{
	QVariant curData = cBox->property("ST_Test");
    if(curData.isNull())
    {
    	return;
    }

    ST_Test* pTest = curData.value<ST_Test*>();
    qDebug() << cBox->text() << " " << pTest->szName << " " << pTest->iLen << " " << pTest->c << " " << pTest->szPhone;
}