自定义代理

 

 以下代码：可以在view 和model文章中进行添加

    m_model = new QStandardItemModel(2, FixedColumnCount, this);

    m_selection = new QItemSelectionModel(m_model, this);
    ui->tableView->setModel(m_model); //设置模型
    ui->tableView->setSelectionModel(m_selection); //设置选择的模型
    ui->tableView->setSelectionMode(QAbstractItemView::ExtendedSelection); //设置选择的方式
    ui->tableView->setSelectionBehavior(QAbstractItemView::SelectItems); //设置选择行为
    connect(m_selection, &QItemSelectionModel::currentChanged, this, &MainWindow::do_currentChanged);

    intSpinDelegate = new TSpinBoxDelegate(this);
    ui->tableView->setItemDelegateForColumn(0, intSpinDelegate); //给第几列设置属性
    floatSpinDelegate = new TFloatSpinboxDelegate(this);
    ui->tableView->setItemDelegateForColumn(1, floatSpinDelegate);

    comDelegate = new TComBoxDelegate(this);
    QStringList strlist;
    strlist << "优"
            << "良"
            << "中"
            << "差";
    comDelegate->setItems(strlist, false); // com添加item并且不可以编辑
    ui->tableView->setItemDelegateForColumn(2, comDelegate);

tcomboxdelegate.cpp

#include "tcomboxdelegate.h"
#include 
TComBoxDelegate::TComBoxDelegate(QObject* parent)
    : QStyledItemDelegate { parent }
{
}
QWidget* TComBoxDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    QComboBox* editor = new QComboBox(parent);
    editor->setEditable(m_editable);
    qDebug() << m_itemList.size();
    for (auto item : m_itemList) {
        editor->addItem(item);
    }
    return editor;
}

void TComBoxDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{
    QComboBox* box = dynamic_cast(editor); //把editor转为指向QSpinBox的指针 动态强转
    QString value = index.model()->data(index, Qt::DisplayRole).toString();
    box->setCurrentText(value);
}

void TComBoxDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
{
    QComboBox* box = dynamic_cast(editor); //把editor转为指向QSpinBox的指针 动态强转
    QString value = box->currentText();
    model->setData(index, value);
}

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

void TComBoxDelegate::setItems(QStringList list, bool editabale)
{
    m_itemList = list;
    m_editable = editabale;
}

tcomboxdelegate.h

#ifndef TCOMBOXDELEGATE_H
#define TCOMBOXDELEGATE_H

#include 
#include 

class TComBoxDelegate : public QStyledItemDelegate {
    Q_OBJECT
public:
    explicit TComBoxDelegate(QObject* parent = nullptr);

    // QAbstractItemDelegate interface
public:
    virtual QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const override;
    virtual void setEditorData(QWidget* editor, const QModelIndex& index) const override;
    virtual void setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const override;
    virtual void updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const override;
    void setItems(QStringList list, bool editabale);

private:
    QStringList m_itemList;
    bool m_editable;
};

#endif // TCOMBOXDELEGATE_H

tfloatspinboxdelegate.cpp

#include "tfloatspinboxdelegate.h"
#include 
TFloatSpinboxDelegate::TFloatSpinboxDelegate(QObject* parent)
    : QStyledItemDelegate { parent }
{
}
QWidget* TFloatSpinboxDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    //创建
    QDoubleSpinBox* editor = new QDoubleSpinBox(parent);
    editor->setFrame(true);
    editor->setMinimum(0);

    editor->setMaximum(150);
    return editor;
}

void TFloatSpinboxDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{ //设置值
    QDoubleSpinBox* box = dynamic_cast(editor); //把editor转为指向QSpinBox的指针 动态强转
    double value = index.model()->data(index, Qt::DisplayRole).toDouble();
    box->setValue(value);
}

void TFloatSpinboxDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
{ //将值设置给模型
    QDoubleSpinBox* box = static_cast(editor); //静态强转
    double value = box->value();
    model->setData(index, value);
}

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

tfloatspinboxdelegate.h

#ifndef TFLOATSPINBOXDELEGATE_H
#define TFLOATSPINBOXDELEGATE_H

#include 
#include 

class TFloatSpinboxDelegate : public QStyledItemDelegate {
    Q_OBJECT
public:
    explicit TFloatSpinboxDelegate(QObject* parent = nullptr);

    // QAbstractItemDelegate interface
public:
    virtual QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const override;
    virtual void setEditorData(QWidget* editor, const QModelIndex& index) const override;
    virtual void setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const override;
    virtual void updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const override;
};

#endif // TFLOATSPINBOXDELEGATE_H