Qt|Qt MVC 代理部分实现 Qt|C++

Qt MVC 代理部分实现第一部分：文字编辑lineEdit 直接堆代码
头文件inputDelegate.h

class InputDelegate: public QItemDelegate { Q_OBJECT public: explicit InputDelegate(QObject *parent = nullptr); //第1步：创建一个widget作为编辑器 QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,const QModelIndex &index) const; //第2步：初始化显示数据 void setEditorData(QWidget *editor, const QModelIndex &index) const ; //第3步：用户完成编辑、编辑器被关闭时，提供数据到model void setModelData(QWidget *editor, QAbstractItemModel *model,const QModelIndex &index) const ; //第4步：调用编辑器的显示位置 void updateEditorGeometry(QWidget *editor,const QStyleOptionViewItem &option, const QModelIndex &index) const; };

【Qt|Qt MVC 代理部分实现】inputdelegate.cpp实现

InputDelegate::InputDelegate(QObject *parent) : QItemDelegate(parent) {}QWidget *InputDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &/*option*/, const QModelIndex &/*index*/) const { QLineEdit *pEditor = new QLineEdit(parent); return pEditor; }void InputDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const { QString text = index.model()->data(index, Qt::DisplayRole).toString(); QLineEdit *lineEdit = static_cast(editor); lineEdit->setText(text); }void InputDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const { QLineEdit *lineEdit = static_cast(editor); QString text = lineEdit->text(); model->setData(index, text, Qt::EditRole); }void InputDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const { editor->setGeometry(option.rect); }