QT代理Delegates使用实例（三种代理控件）

效果如下，在表格的单元格中插入控件，用Delegates方式实现

QT代理Delegates使用实例（三种代理控件）-LMLPHP

源代码如下：

main.cpp文件

#include <QApplication>
#include <QStandardItemModel>
#include <QTableView>
#include <QFile>
#include <QTextStream>
#include "datedelegate.h"
#include "combodelegate.h"
#include "spindelegate.h"

int main(int argc,char *argv[])
{
QApplication app(argc,argv);

QStandardItemModel model(4,4);
QTableView tableView;
tableView.setModel(&model);

DateDelegate dateDelegate;
tableView.setItemDelegateForColumn(1,&dateDelegate);

ComboDelegate comboDelegate;
tableView.setItemDelegateForColumn(2,&comboDelegate);

SpinDelegate spinDelegate;
tableView.setItemDelegateForColumn(3,&spinDelegate);

model.setHeaderData(0,Qt::Horizontal,QObject::tr("Name"));
model.setHeaderData(1,Qt::Horizontal,QObject::tr("Birthday"));
model.setHeaderData(2,Qt::Horizontal,QObject::tr("Job"));
model.setHeaderData(3,Qt::Horizontal,QObject::tr("Income"));

QFile file("test.tab");
if(file.open(QFile::ReadOnly|QFile::Text))
{
QTextStream stream(&file);
QString line;

model.removeRows(0,model.rowCount(QModelIndex()),QModelIndex());
int row =0;
do{
line = stream.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();
}
tableView.setWindowTitle(QObject::tr("Delegate"));
tableView.show();
return app.exec();
}

datedelegate.h文件

#ifndef DATEDELEGATE_H
#define DATEDELEGATE_H

#include <QItemDelegate>

class DateDelegate : public QItemDelegate
{
Q_OBJECT

public:
DateDelegate(QObject *parent = 0);

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

datedelegate.cpp文件

#include "datedelegate.h"
#include <QDateTimeEdit>

DateDelegate::DateDelegate(QObject *parent) :
QItemDelegate(parent)
{
}

QWidget *DateDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/*option*/,
const QModelIndex &/*index*/) const
{
QDateTimeEdit *editor = new QDateTimeEdit(parent);
editor->setDisplayFormat("yyyy-MM-dd");
editor->setCalendarPopup(true);
editor->installEventFilter(const_cast<DateDelegate*>(this));

return editor;
}

void DateDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{
QString dateStr= index.model()->data(index).toString();
QDate date = QDate::fromString(dateStr,Qt::ISODate);

QDateTimeEdit *edit=static_cast<QDateTimeEdit*>(editor);
edit->setDate(date);
}

void DateDelegate::setModelData(QWidget *editor,QAbstractItemModel *model,
const QModelIndex &index) const
{
QDateTimeEdit *edit=static_cast<QDateTimeEdit*>(editor);
QDate date = edit->date();
model->setData(index,QVariant(date.toString(Qt::ISODate)));
}

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

combodelegate.h文件

#ifndef COMBODELEGATE_H
#define COMBODELEGATE_H

#include <QItemDelegate>

class ComboDelegate : public QItemDelegate
{
Q_OBJECT

public:
ComboDelegate(QObject *parent = 0);

};

#endif // COMBODELEGATE_H

combodelegate.cpp文件

#include "combodelegate.h"
#include <QComboBox>

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

QWidget *ComboDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/*option*/,
const QModelIndex &/*index*/) const
{
QComboBox *editor = new QComboBox(parent);
editor->addItem(QString::fromLocal8Bit("工人"));
editor->addItem(QString::fromLocal8Bit("农民"));
editor->addItem(QString::fromLocal8Bit("医生"));
editor->addItem(QString::fromLocal8Bit("律师"));
editor->addItem(QString::fromLocal8Bit("军人"));
editor->installEventFilter(const_cast<ComboDelegate*>(this));

return editor;
}

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

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

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

spindelegate.h文件

#ifndef SPINDELEGATE_H
#define SPINDELEGATE_H

#include <QItemDelegate>

class SpinDelegate : public QItemDelegate
{
Q_OBJECT

public:
SpinDelegate(QObject *parent = 0);

};

#endif // SPINDELEGATE_H

spindelegate.cpp文件

#include "spindelegate.h"
#include <QSpinBox>

SpinDelegate::SpinDelegate(QObject *parent) :
QItemDelegate(parent)
{
}

QWidget *SpinDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/*option*/,
const QModelIndex &/*index*/) const
{
QSpinBox *editor = new QSpinBox(parent);
editor->setRange(0,10000);
editor->installEventFilter(const_cast<SpinDelegate*>(this));

return editor;
}

void SpinDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{
int value =index.model()->data(index).toInt();

QSpinBox *box = static_cast<QSpinBox*>(editor);
box->setValue(value);
}

void SpinDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const
{
QSpinBox *box = static_cast<QSpinBox*>(editor);
int value = box->value();

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

http://blog.csdn.net/liuguangzhou123/article/details/7355985