在QTableView中使用各种自定义委托 包括ComboBox、DoubleSpinBox、CheckBox以及设置列只读

GitHub：https://github.com/mygit03/ModelDelegate.git

itemdelegate.h

#ifndef ITEMDELEGATE_H
#define ITEMDELEGATE_H

#include 
#include 

/*
 * ReadOnly
 */
class ReadOnlyDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    ReadOnlyDelegate(QObject *parent = 0): QItemDelegate(parent) {}

    void setItems(QStringList items);

    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex	&index) const
    {
        return NULL;
    }
};

/*
 * ComboBox
 */
class ComboDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    ComboDelegate(QObject *parent = 0);

    void setItems(QStringList items);

    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex	&index) const;
    void setEditorData(QWidget *editor, const QModelIndex &index) const;
    void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;
    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const  QModelIndex &index) const;

private:
    QStringList m_sItemList;
};

/*
 * DoubleSpinBox
 */
class SpinBoxDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    SpinBoxDelegate(QObject *parent = 0);

    void setRange(double min, double max);

    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex	&index) const;
    void setEditorData(QWidget *editor, const QModelIndex &index) const;
    void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;
    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const  QModelIndex &index) const;

private:
    double minValue;
    double maxValue;
};

/*
 * CheckBox
 */
class CheckBoxDelegate : public QStyledItemDelegate
{
    Q_OBJECT
public:
    CheckBoxDelegate(QObject *parent = 0);

    void setColumn(int col);

protected:
    void paint(QPainter* painter,const QStyleOptionViewItem& option,const QModelIndex& index) const;
    bool editorEvent(QEvent *event,QAbstractItemModel *model,const QStyleOptionViewItem &option,const QModelIndex &index);

private:
    int column;         //设置复选框的列
};

#endif // ITEMDELEGATE_H

itemdelegate.cpp

#include "itemdelegate.h"
#include 
#include 
#include 
#include 
#include 
#include 
#include 

/*
 * ComboDelegate
 */
ComboDelegate::ComboDelegate(QObject *parent) :
    QItemDelegate(parent)
{
}

//自定义下拉框列表项
void ComboDelegate::setItems(QStringList items)
{
    m_sItemList = items;
}

QWidget *ComboDelegate::createEditor(QWidget *parent,const QStyleOptionViewItem &/*option*/,const QModelIndex &/*index*/) const
{
    QComboBox *editor = new QComboBox(parent);
    editor->addItems(m_sItemList);
    editor->installEventFilter(const_cast(this));
    return editor;
}

void ComboDelegate::setEditorData(QWidget *editor,const QModelIndex &index) const
{
    QString str =index.model()->data(index).toString();

    QComboBox *box = static_cast(editor);
    int i=box->findText(str);
    box->setCurrentIndex(i);
}

void ComboDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    QComboBox *box = static_cast(editor);
    QString str = box->currentText();
    model->setData(index,str);
}

void ComboDelegate::updateEditorGeometry(QWidget *editor,const QStyleOptionViewItem &option, const QModelIndex &/*index*/) const
{
    editor->setGeometry(option.rect);
}

/*
 * SpinBoxDelegate
 */
SpinBoxDelegate::SpinBoxDelegate(QObject *parent) :
    QItemDelegate(parent)
{
    //初始化最大最小值
    minValue = 1.00;
    maxValue = 100.00;
}

void SpinBoxDelegate::setRange(double min, double max)
{
    minValue = min;
    maxValue = max;
}

QWidget *SpinBoxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QDoubleSpinBox *editor =  new QDoubleSpinBox(parent);
    editor->setMinimum(minValue);
    editor->setMaximum(maxValue);
    editor->setSingleStep(0.01);
    return editor;
}

void SpinBoxDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    double value = index.model()->data(index, Qt::EditRole).toDouble();
    QDoubleSpinBox *spinBox =  static_cast (editor);
    spinBox->setValue(value);
}

void SpinBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    QDoubleSpinBox *spinBox =  static_cast (editor);
    spinBox->interpretText();
    double value = spinBox->value();
    model->setData(index, value, Qt::EditRole);
}

void SpinBoxDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    editor->setGeometry(option.rect);
}

/*
 * CheckBoxDelegate
 */
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::setColumn(int col)
{
    column = col;
}

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

    if(index.column() == column){
        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);
    }
}

// 响应鼠标事件，更新数据
bool CheckBoxDelegate::editorEvent(QEvent *event,
                                QAbstractItemModel *model,
                                const QStyleOptionViewItem &option,
                                const QModelIndex &index) {
    if(index.column() == column){
    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();
    int data = checked ? 0 : 1;     //互逆
    return model->setData(index, data, Qt::EditRole);
    }else{
        return QStyledItemDelegate::editorEvent(event, model, option, index);
    }
}

引用代码：

    for(int col = 0; col < 4; ++col)
    {
        if(col == 0)
        {
            ReadOnlyDelegate *readOnly = new ReadOnlyDelegate;
            setItemDelegateForColumn(col,readOnly);
        }
        if(col == 1)
        {
            CheckBoxDelegate *checkBox = new CheckBoxDelegate;
            checkBox->setColumn(1);
            setItemDelegateForColumn(col,checkBox);
        }
        if(col == 2)
        {
            SpinBoxDelegate *spinBox = new SpinBoxDelegate;
            setItemDelegateForColumn(col,spinBox);
        }
        if(col == 3)
        {
            ComboDelegate *combo = new ComboDelegate;
            combo->setItems(items);
            setItemDelegateForColumn(col,combo);
        }
        for(int row = 0; row < 4; ++row)
        {
            QModelIndex index = model->index(row, col, QModelIndex());
            model->setData(index, QString("%1%2").arg(row).arg(col));
        }
    }

参考文档：

学习记录-QTableView自定义委托实现QCheckBox复选框