Qt QTableWidget详解

绝地灬酷狼 2022-12-23 07:07 395阅读 0赞

# 1.常用API设置 #

//设置列数
        ui->tableWidget->setColumnCount(4);
    
        //设置行数
        ui->tableWidget->setRowCount(5);
    
        //去除选中虚线框
        ui->tableWidget->setFocusPolicy(Qt::NoFocus);
    
        //表头标题用QStringList来表示
        QStringList headerText;
        headerText<<"姓 名"<<"性 别"<<"出生日期"<<"国 籍";
        ui->tableWidget->setHorizontalHeaderLabels(headerText);
    
        //设置列宽
        ui->tableWidget->setColumnWidth(0,200);
        ui->tableWidget->setColumnWidth(1,200);
        ui->tableWidget->setColumnWidth(2,200);
        ui->tableWidget->setColumnWidth(3,200);
    
        //需要打开右键菜单属性,则必须设置
        ui->tableWidget->setContextMenuPolicy(Qt::CustomContextMenu);
    
        //设置最后一栏自适应长度
        ui->tableWidget->horizontalHeader()->setStretchLastSection(true);
    
        //设置列内容自适应宽度
        //ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
    
        //设置为可以选中多个目标,按ctrl键
        ui->tableWidget->setSelectionMode(QAbstractItemView::ExtendedSelection);
    
        //开启交替行背景色,在设置style为交替颜色时必须开启
        ui->tableWidget->setAlternatingRowColors(true);
    
        //清除表格数据区的所有内容，但是不清除表头。
    //    ui->tableWidget->clearContents();
    
        //清除表格数据区的所有内容，包括表头。
    //    //ui->tableWidget->clear();

**自动调整行高和列宽**

QTableWidget 有几个函数自动调整表格的行高和列宽，分别如下：

*  resizeColumnsToContents()：自动调整所有列的宽度，以适应其内容。
 *  resizeColumnToContents(int column)：自动调整列号为 co/www 的列的宽度。
 *  resizeRowsToContents()：自动调整所有行的高度，以适应其内容。
 *  resizeRowToContents(int row)：自动调整行号为 raw 的行的高度。

**设置表格内容是否可编辑**

*  ui->tableInfo->setEditTriggers(QAbstractItemView::DoubleClicked | QAbstractItemView::SelectedClicked);//双击或获取焦点后单击，进入编辑状态
 *  ui->tableInfo->setEditTriggers(QAbstractItemView::NoEditTriggers); //不允许编辑

**设置行表头、列表头是否显示**

*  ui->tableInfo->horizontalHeader()->setVisible(checked);//是否显示水平表头
 *  ui->tableInfo->verticalHeader()->setVisible(checked);//是否显示垂直表头

**选择模式**

*  ui->tableInfo->setSelectionBehavior(QAbstractltemView::Selectltems); 单元格选择
 *  ui->tableInfo->setSelectionBehavior(QAbstractltemView::SelectRows); 行选择

#  2.添加子项 #

这里添加三个string,和一个自定义的combobox

QComboBox *combox1 = new QComboBox(ui->tableWidget);
        combox1->addItem("man");
        combox1->addItem("woman");
    
        QComboBox *combox2 = new QComboBox(ui->tableWidget);
        combox2->addItem("man");
        combox2->addItem("woman");
    
        QComboBox *combox3 = new QComboBox(ui->tableWidget);
        combox3->addItem("man");
        combox3->addItem("woman");
    
        QComboBox *combox4 = new QComboBox(ui->tableWidget);
        combox4->addItem("man");
        combox4->addItem("woman");
    
        QComboBox *combox5 = new QComboBox(ui->tableWidget);
        combox5->addItem("man");
        combox5->addItem("woman");
    
        //添加
        ui->tableWidget->setItem(0,0,new QTableWidgetItem("Tom"));
        //ui->tableWidget->setItem(0,1,new QTableWidgetItem("man"));
        ui->tableWidget->setItem(0,2,new QTableWidgetItem("1999.11.11"));
        ui->tableWidget->setItem(0,3,new QTableWidgetItem("England"));
    
        ui->tableWidget->setItem(1,0,new QTableWidgetItem("Jery"));
        //ui->tableWidget->setItem(1,1,new QTableWidgetItem("man"));
        ui->tableWidget->setItem(1,2,new QTableWidgetItem("1997.08.12"));
        ui->tableWidget->setItem(1,3,new QTableWidgetItem("England"));
    
        ui->tableWidget->setItem(2,0,new QTableWidgetItem("Mary"));
        //ui->tableWidget->setItem(2,1,new QTableWidgetItem("woman"));
        ui->tableWidget->setItem(2,2,new QTableWidgetItem("1998.03.12"));
        ui->tableWidget->setItem(2,3,new QTableWidgetItem("England"));
    
        ui->tableWidget->setItem(3,0,new QTableWidgetItem("Jessy"));
        //ui->tableWidget->setItem(3,1,new QTableWidgetItem("woman"));
        ui->tableWidget->setItem(3,2,new QTableWidgetItem("2000.04.17"));
        ui->tableWidget->setItem(3,3,new QTableWidgetItem("England"));
    
        ui->tableWidget->setItem(4,0,new QTableWidgetItem("Jim"));
        //ui->tableWidget->setItem(4,1,new QTableWidgetItem("man"));
        ui->tableWidget->setItem(4,2,new QTableWidgetItem("1997.09.28"));
        ui->tableWidget->setItem(4,3,new QTableWidgetItem("England"));
    
        ui->tableWidget->setCellWidget(0,1,combox1);
        ui->tableWidget->setCellWidget(1,1,combox2);
        ui->tableWidget->setCellWidget(2,1,combox3);
        ui->tableWidget->setCellWidget(3,1,combox4);
        ui->tableWidget->setCellWidget(4,1,combox5);

//设置单个item属性

//对单个item进行设置
        QTableWidgetItem *item = new QTableWidgetItem("item");
        //获取原有字体设置
        QFont font = item->font();
        //设置为粗体
        font.setBold(true);
        //字体大小
        font.setPointSize(12);
        //字体颜色
        item->setTextColor(Qt::red);
        //设置字体
        item->setFont(font);
        //文本对齐格式
        item->setTextAlignment(Qt::AlignHCenter | Qt::AlignVCenter);

# 3.右键弹出菜单 #

这里添加一个右键菜单,有两个action,一个删除 一个添加

m_menu = new QMenu(this);
        m_actionAdd = new QAction("添加",m_menu);
        connect(m_actionAdd,&QAction::triggered,this,&Form::slotAdd);
        m_actionDel = new QAction("删除",m_menu);
        connect(m_actionDel,&QAction::triggered,this,&Form::slotDel);
        m_menu->addAction(m_actionAdd);
        m_menu->addAction(m_actionDel);
    
        connect(ui->tableWidget,&QTableWidget::customContextMenuRequested,this,&Form::slotPopMenu);
    
        void Form::slotAdd()
        {
            int row = ui->tableWidget->currentRow();
            ui->tableWidget->insertRow(row);
        }
    
        void Form::slotDel()
        {
            int row = ui->tableWidget->currentRow();
            ui->tableWidget->removeRow(row);
        }
    
        void Form::slotPopMenu(const QPoint &pos)
        {
            qDebug()<<pos.x()<<" "<<pos.y();
            QPoint p;
            p.setX(pos.x());
            p.setY(pos.y() + m_menu->height() / 2 );
            m_menu->exec(ui->tableWidget->mapToGlobal(p));
        }

# 4.设置风格 #

这里简单的设置了一下颜色，头部样式，仅供参考。

const QString styles = "QTableView\
    {\
        selection-background-color: qlineargradient(x1: 0, y1: 0, x2: 0.5, y2: 0.5,\
                                        stop: 0 #616161, stop: 1 505050);\
        /*alternate-background-color:blue;*/\
    }";
    
    const QString headerStyle = "QHeaderView::section\
    {\
        background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1,\
                                              stop:0 #616161, stop: 0.5 #505050,\
                                              stop: 0.6 #434343, stop:1 #656565);\
        color: white;\
        padding-left: 4px;\
        border: 1px solid #6c6c6c;\
    }\
    /*QHeaderView::section:checked\
    {\
        background-color: red;\
    }*/";
    
        ui->tableWidget->setStyleSheet(styles);
        ui->tableWidget->horizontalHeader()->setStyleSheet(headerStyle);

# 5.清空 #

clear() 和 removeRow方法都会delete项数据，不必担心内存泄露。

//清除表格数据区的所有内容，但是不清除表头。
        ui->tableWidget->clearContents();
        //ui->tableWidget->clear();
        int nCount = ui->tableWidget->rowCount();
        for(int i=0;i<nCount;i++)
        {
            ui->tableWidget->removeRow(0);
        }

# 6.运行截图 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70][]

# 7.源码 #

[https://download.csdn.net/download/wzz953200463/13165213][https_download.csdn.net_download_wzz953200463_13165213]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70]: /images/20221120/6adc7eeb66e44d678ac206033292f9dd.png
[https_download.csdn.net_download_wzz953200463_13165213]: https://download.csdn.net/download/wzz953200463/13165213