Qt的MVC架构可以实现很多数据显示的功能，本次主要对代理进行一个总结：
重实现QStyledItemDelegate类，实现自定义类。
（1）ComboxDelegate.h
#ifndef COMBODELEGATE_H#define COMBODELEGATE_H#include <QStyledItemDelegate>class ComboDelegate : public QStyledItemDelegate{public: ???ComboDelegate(QObject *parent = NULL);protected: ???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;};#endif // COMBODELEGATE_H（2）ComboDelegate.cpp
#include "ComboDelegate.h"#include <QComboBox>ComboDelegate::ComboDelegate(QObject *parent) ???: QStyledItemDelegate(parent){}QWidget *ComboDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{ ???Q_UNUSED(option); ???Q_UNUSED(index); ???QStringList list; ???list << "工人" << "农民" << "军人" << "律师"; ???QComboBox *pEditor = new QComboBox(parent); ???pEditor->addItems(list); ???pEditor->installEventFilter(const_cast<ComboDelegate*>(this)); ???return pEditor;}void ComboDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const{ ???QString strText = index.model()->data(index).toString(); ???QComboBox *pCombox = NULL; ???pCombox = static_cast<QComboBox*>(editor); ???if (pCombox != NULL) ???{ ???????int nIndex = pCombox->findText(strText); ???????pCombox->setCurrentIndex(nIndex); ???}}void ComboDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index)const{ ???QComboBox *pCombox = NULL; ???pCombox = static_cast<QComboBox*>(editor); ???if (pCombox != NULL) ???{ ???????QString strText = pCombox->currentText(); ???????model->setData(index, strText); ???}}void ComboDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index)const{ ???Q_UNUSED(index); ???editor->setGeometry(option.rect);}（3）DateDelegate.h
#ifndef DATEDELEGATE_H#define DATEDELEGATE_H#include <QStyledItemDelegate>class DateDelegate : public QStyledItemDelegate{public: ???DateDelegate(QObject *parent = NULL);protected: ???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;};#endif // DATEDELEGATE_H（4）DateDelegate.cpp
#include "DateDelegate.h"#include <QDateTimeEdit>DateDelegate::DateDelegate(QObject *parent) ???: QStyledItemDelegate(parent){}// 首先创建要进行代理的窗体QWidget *DateDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{ ???Q_UNUSED(option); ???Q_UNUSED(index); ???QDateTimeEdit *pEditor = new QDateTimeEdit(parent); ?????// 一个日历的控件 ???pEditor->setDisplayFormat("yyyy-MM-dd"); ??// 日期时间的显示格式 ???pEditor->setCalendarPopup(true); ??// 以下拉的方式显示 ???pEditor->installEventFilter(const_cast<DateDelegate*>(this)); ?// 调用这个函数安装事件过滤器，使这个对象可以捕获QDateTimeEdit对象的事件 ???return pEditor;}// 这个是初始化作用，初始化代理控件的数据void DateDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const{ ?// 先用这个index返回这个model然后用这个model得到index对应的数据 ?QString strDate = index.model()->data(index).toString(); ?QDate date = QDate::fromString(strDate, Qt::ISODate); ????// 根据QString类型得到相应的时间类型 ?QDateTimeEdit *pEditor = NULL; ?pEditor = static_cast<QDateTimeEdit*>(editor); ???// 强转为QDateTimeEdit*类型 ?if (pEditor != NULL) ?{ ?????pEditor->setDate(date); ?????// 设置代理控件的显示数据 ?}}// 将代理控件里面的数据更新到视图控件中// void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;void DateDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const{ ?QDateTimeEdit *pEditor = NULL; ?pEditor = static_cast<QDateTimeEdit*>(editor); ???// 得到时间 ?if (pEditor != NULL) ?{ ?????QDate date = pEditor->date(); ???// 得到时间 ?????model->setData(index, QVariant(date.toString(Qt::ISODate))); ???// 把值放到相应的index里面 ?}}// 代理中数据的改变放到model中// void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const;void DateDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const{ ???Q_UNUSED(index); ???editor->setGeometry(option.rect);}（5）SpinDelegate.h
#ifndef SPINDELEGATE_H#define SPINDELEGATE_H#include <QStyledItemDelegate>class SpinDelegate : public QStyledItemDelegate{public: ???SpinDelegate(QObject *parent = NULL);protected: ???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;};#endif // SPINDELEGATE_H（6）SpinDelegate.cpp
#include "SpinDelegate.h"#include <QSpinBox>SpinDelegate::SpinDelegate(QObject *parent) ???: QStyledItemDelegate(parent){}QWidget *SpinDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{ ???Q_UNUSED(option); ???Q_UNUSED(index); ???QSpinBox *pEditor = new QSpinBox(parent); ???pEditor->setRange(0, 30000); ???pEditor->installEventFilter(const_cast<SpinDelegate*>(this)); ???return pEditor;}void SpinDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const{ ???int value = index.model()->data(index).toInt(); ???QSpinBox *pSpinbox = NULL; ???pSpinbox = static_cast<QSpinBox*>(editor); ???if (pSpinbox != NULL) ???{ ???????pSpinbox->setValue(value); ???}}void SpinDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const{ ???QSpinBox *pSpinbox = NULL; ???pSpinbox = static_cast<QSpinBox*>(editor); ???if (pSpinbox != NULL) ???{ ???????int value = pSpinbox->value(); ???????model->setData(index, value); ???}}void SpinDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const{ ???Q_UNUSED(index); ???editor->setGeometry(option.rect);}（7）main.cpp
#include <QApplication>#include <QFile>#include <QDebug>#include <QWidget>#include <QTableView>#include <QTextStream>#include <QStandardItemModel>#include "DateDelegate.h"#include "ComboDelegate.h"#include "SpinDelegate.h"int main(int argc, char *argv[]){ ???QApplication a(argc, argv); ???QStandardItemModel model(4, 4); ???model.setHeaderData(0, Qt::Horizontal, QLatin1String("Name")); ???model.setHeaderData(1, Qt::Horizontal, QLatin1String("Birthday")); ???model.setHeaderData(2, Qt::Horizontal, QLatin1String("Job")); ???model.setHeaderData(3, Qt::Horizontal, QLatin1String("Income")); ???QFile file(QLatin1String("/mnt/liuy/info")); ???if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) ???{ ???????qDebug() << "open the file failed..."; ???????return -1; ???} ???QTextStream out(&file); ???QString line; ???model.removeRows(0, model.rowCount(QModelIndex()), QModelIndex()); ???int row = 0; ???do ???{ ???????line = out.readLine(); ???????if (!line.isEmpty()) ???????{ ???????????model.insertRows(row, 1, QModelIndex()); ???????????QStringList pieces = line.split(",", QString::SkipEmptyParts); ???????????model.setData(model.index(row, 0, QModelIndex()), pieces.value(0)); ???????????model.setData(model.index(row, 1, QModelIndex()), pieces.value(1)); ???????????model.setData(model.index(row, 2, QModelIndex()), pieces.value(2)); ???????????model.setData(model.index(row, 3, QModelIndex()), pieces.value(3)); ???????????++row; ???????} ???} while(!line.isEmpty()); ???file.close(); ???QTableView tableView; ???tableView.setModel(&model); // 绑定Model ???tableView.setWindowTitle(QLatin1String("Delegate")); ???DateDelegate dateDelegate; ???tableView.setItemDelegateForColumn(1, &dateDelegate); // 第一列代理 ???ComboDelegate comboDelegate; ???tableView.setItemDelegateForColumn(2, &comboDelegate);// 第二列代理 ???SpinDelegate spinDelegate; ???tableView.setItemDelegateForColumn(3, &spinDelegate); // 第三列代理 ???tableView.resize(500, 300); // 重置大小 ???tableView.show(); ???return a.exec();}运行效果图如下：
第二列编辑图（时间日期控件）：
第三列编辑图（下拉框控件）：
第四列编辑图（微调框控件）：
引用：http://www.cnblogs.com/Braveliu/p/7488250.html
未完待续...
#include <QApplication>#include <QFile>#include <QDebug>#include <QWidget>#include <QTableView>#include <QTextStream>#include <QStandardItemModel>#include "DateDelegate.h"#include "ComboDelegate.h"#include "SpinDelegate.h"
int main(int argc, char *argv[]){ QApplication a(argc, argv);
QStandardItemModel model(4, 4); model.setHeaderData(0, Qt::Horizontal, QLatin1String("Name")); model.setHeaderData(1, Qt::Horizontal, QLatin1String("Birthday")); model.setHeaderData(2, Qt::Horizontal, QLatin1String("Job")); model.setHeaderData(3, Qt::Horizontal, QLatin1String("Income"));
QFile file(QLatin1String("/mnt/liuy/info")); if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug() << "open the file failed..."; return -1; }
QTextStream out(&file); QString line; model.removeRows(0, model.rowCount(QModelIndex()), QModelIndex()); int row = 0; do { line = out.readLine(); if (!line.isEmpty()) { model.insertRows(row, 1, QModelIndex()); QStringList pieces = line.split(",", QString::SkipEmptyParts); model.setData(model.index(row, 0, QModelIndex()), pieces.value(0)); model.setData(model.index(row, 1, QModelIndex()), pieces.value(1)); model.setData(model.index(row, 2, QModelIndex()), pieces.value(2)); model.setData(model.index(row, 3, QModelIndex()), pieces.value(3)); ++row; } } while(!line.isEmpty()); file.close();
QTableView tableView; tableView.setModel(&model); // 绑定Model tableView.setWindowTitle(QLatin1String("Delegate"));
DateDelegate dateDelegate; tableView.setItemDelegateForColumn(1, &dateDelegate); // 第一列代理 ComboDelegate comboDelegate; tableView.setItemDelegateForColumn(2, &comboDelegate);// 第二列代理 SpinDelegate spinDelegate; tableView.setItemDelegateForColumn(3, &spinDelegate); // 第三列代理
tableView.resize(500, 300); // 重置大小 tableView.show();
return a.exec();}
MVC架构之delegate
原文地址：http://www.cnblogs.com/yuemw/p/7899382.html