QTableView 设置QCheckbox代理

在QTableView中设置QCheckBox 

头文件：checkboxdelegate.h

#ifndef CHECKBOXDELEGATE_H
#define CHECKBOXDELEGATE_H

#include 

class CheckBoxDelegate:public QStyledItemDelegate
{
    Q_OBJECT
   public:
       CheckBoxDelegate(QObject *parent = nullptr);
   protected:
       void paint(QPainter* painter,const QStyleOptionViewItem& option,const QModelIndex& index) const;
       bool editorEvent(QEvent *event,QAbstractItemModel *model,const QStyleOptionViewItem &option,const QModelIndex &index);
};

#endif // CHECKBOXDELEGATE_H

源文件： checkboxdelegate.cpp

#include "checkboxdelegate.h"

#include 
#include 
#include 
#include 
#include 

static QRect CheckBoxRect(const QStyleOptionViewItem &viewItemStyleOptions)/*const*/
{
    //绘制按钮所需要的参数
    QStyleOptionButton checkBoxStyleOption;
    //按照给定的风格参数 返回元素子区域
    QRect checkBoxRect = QApplication::style()->subElementRect( QStyle::SE_CheckBoxIndicator, &checkBoxStyleOption);
    //返回QCheckBox坐标
    QPoint checkBoxPoint(viewItemStyleOptions.rect.x() + viewItemStyleOptions.rect.width() / 2 - checkBoxRect.width() / 2,
                         viewItemStyleOptions.rect.y() + viewItemStyleOptions.rect.height() / 2 - checkBoxRect.height() / 2);
    //返回QCheckBox几何形状
    return QRect(checkBoxPoint, checkBoxRect.size());
}

CheckBoxDelegate::CheckBoxDelegate(QObject *parent):QStyledItemDelegate(parent)
{

}

void CheckBoxDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,const QModelIndex& index)const
{
    bool checked = index.model()->data(index, Qt::DisplayRole).toBool();

    if(index.column() == 11)//重要：设置在第几列显示checkbox
    {
        qDebug() << checked;
        //此处可以设置信号；
        QStyleOptionButton checkBoxStyleOption;
        checkBoxStyleOption.state |= QStyle::State_Enabled;
        checkBoxStyleOption.state |= checked? QStyle::State_On : QStyle::State_Off;
        checkBoxStyleOption.rect = CheckBoxRect(option);

        QApplication::style()->drawControl(QStyle::CE_CheckBox,&checkBoxStyleOption,painter);
    }
    else
    {
        QStyledItemDelegate::paint(painter, option, index);
    }
}

bool CheckBoxDelegate::editorEvent(QEvent *event,QAbstractItemModel *model,const QStyleOptionViewItem &option,const QModelIndex &index)
{
    if(index.column() == 11)
    {
        if((event->type() == QEvent::MouseButtonRelease) ||(event->type() == QEvent::MouseButtonDblClick))
        {
            QMouseEvent *mouseEvent = static_cast(event);
            if(mouseEvent->button() != Qt::LeftButton ||!CheckBoxRect(option).contains(mouseEvent->pos()))
            {
                return true;
            }
            if(event->type() == QEvent::MouseButtonDblClick)
            {
                return true;
            }
        }
        else if(event->type() == QEvent::KeyPress)
        {
            if(static_cast(event)->key() != Qt::Key_Space &&
                    static_cast(event)->key() != Qt::Key_Select)
            {
                return false;
            }
        }else
        {
            return false;
        }

        bool checked = index.model()->data(index, Qt::DisplayRole).toBool();
        return model->setData(index, !checked, Qt::EditRole);
    }
    else
    {
        return QStyledItemDelegate::editorEvent(event, model, option, index);
    }
}

使用：

ui->tableView_statictable->setItemDelegate(new CheckBoxDelegate(this));

希望也能帮助到你 ~