学习自唐佐林老师的Qt
SubStyledItemDelegate.h
#ifndef SUBSTYLEDITEMDELEGATE_H
#define SUBSTYLEDITEMDELEGATE_H
#include <QStyledItemDelegate>
//自定义委托类,需要重写成员函数
class SubStyledItemDelegate : public QStyledItemDelegate
{
Q_OBJECT
protected slots:
//关闭编辑器组件槽
void onCloseEditor(QWidget* editor);
//新数据提交槽
void onCommitData(QWidget* editor);
public:
explicit SubStyledItemDelegate(QObject* parent = 0);
//创建编辑器组件
QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
//更新编辑器组件大小
void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const;
//通过索引从模型获取数据
void setEditorData(QWidget *editor, const QModelIndex &index) const;
//将编辑后的新数据返回模型
void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;
};
#endif // SUBSTYLEDITEMDELEGATE_H
Widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QtGui/QWidget>
#include <QTableView>
#include <QStandardItemModel>
#include <QPushButton>
#include "SubStyledItemDelegate.h"
class Widget : public QWidget
{
Q_OBJECT
QTableView m_view;
QStandardItemModel m_model;
QPushButton m_testBtn;
SubStyledItemDelegate m_delegate;//创建自定义委托类对象
void initView();
void initModel();
private slots:
void onTestBtnClicked();
public:
Widget(QWidget* parent = 0);
~Widget();
};
#endif // WIDGET_H
Widget.cpp
#include "Widget.h"
#include <QModelIndex>
#include <QDebug>
Widget::Widget(QWidget* parent) : QWidget(parent)
{
initView();
initModel();
m_view.setModel(&m_model);
m_testBtn.setParent(this);
m_testBtn.move(10, 120);
m_testBtn.resize(300, 30);
m_testBtn.setText("Test");
connect(&m_testBtn, SIGNAL(clicked()), this, SLOT(onTestBtnClicked()));
}
void Widget::initView()
{
m_view.setParent(this);
m_view.move(10, 10);
m_view.resize(300, 100);
//将委托类对象设置到视图中
m_view.setItemDelegate(&m_delegate);
}
void Widget::initModel()
{
QStandardItem* root = m_model.invisibleRootItem();
QStandardItem* itemA = new QStandardItem();
QStandardItem* itemB = new QStandardItem();
QStandardItem* itemC = new QStandardItem();
QStandardItem* itemD = new QStandardItem();
itemA->setData("A", Qt::DisplayRole);
itemB->setData("B", Qt::DisplayRole);
itemC->setData("C", Qt::DisplayRole);
itemD->setData("D", Qt::DisplayRole);
root->setChild(0, 0, itemA);
root->setChild(0, 1, itemB);
root->setChild(1, 0, itemC);
root->setChild(1, 1, itemD);
}
void Widget::onTestBtnClicked()
{
qDebug() << "Model Data:";
for(int i=0; i<m_model.rowCount(); i++)
{
qDebug() << "Row: " << i;
for(int j=0; j<m_model.columnCount(); j++)
{
QModelIndex index = m_model.index(i, j, QModelIndex());
QString text = index.data(Qt::DisplayRole).toString();
qDebug() << text;
}
qDebug() << endl;
}
//查看委托类是哪个
qDebug() << "Current View Delegate: " << m_view.itemDelegate();
}
Widget::~Widget()
{
}
SubStyledItemDelegate.cpp
#include "SubStyledItemDelegate.h"
#include <QDebug>
SubStyledItemDelegate::SubStyledItemDelegate(QObject *parent) :
QStyledItemDelegate(parent)
{
connect(this, SIGNAL(closeEditor(QWidget*)), this, SLOT(onCloseEditor(QWidget*)));
connect(this, SIGNAL(commitData(QWidget*)), this, SLOT(onCommitData(QWidget*)));
}
//创建编辑器组件
QWidget* SubStyledItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
qDebug() << "SubStyledItemDelegate::createEditor";
//直接调用父类委托类成员函数 QQStyledItemDelegate::createEditor
return QStyledItemDelegate::createEditor(parent, option, index);
}
void SubStyledItemDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
qDebug() << "SubStyledItemDelegate::updateEditorGeometry";
//直接调用父类委托类成员函数 QStyledItemDelegate::updateEditorGeometry
QStyledItemDelegate::updateEditorGeometry(editor, option, index);
}
void SubStyledItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
qDebug() << "SubStyledItemDelegate::setEditorData";
QStyledItemDelegate::setEditorData(editor, index);
}
void SubStyledItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
qDebug() << "SubStyledItemDelegate::setModelData";
return QStyledItemDelegate::setModelData(editor, model, index);
}
void SubStyledItemDelegate::onCloseEditor(QWidget* editor)
{
qDebug() << "SubStyledItemDelegate::onCloseEditor";
}
void SubStyledItemDelegate::onCommitData(QWidget* editor)
{
qDebug() << "SubStyledItemDelegate::onCommitData";
}
main.cpp
#include <QtGui/QApplication>
#include "Widget.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}
注意:一次委托的过程 如下
首先创建编辑器
然后改变编辑器大小,使得编辑器大小和数据项大小一致
之后开始设置编辑器中数据
点击回车后提交数据
将数据提交到模型
模型将新数据再次返回到编辑器中
最后关闭编辑器