简单的分析了一个项目： 不懂的地方放在了下面，以后载慢慢看。
view:
class adddialog: 一个获得数据的窗口
calss newaddresstab: 一个空白标签，首界面 有一个信号可以添加数据。点击按钮弹出dilog窗口，获得数据，把信号带数据发送出去
class mainvindows:
model:
class tablemodel： 表格模型，提供接口，包含数据列表，提供接口
cotrol：
class addresswidget: 文件读取和保存数据的功能，增删该功能。表格模型的指针，首标签，排序和过滤。
对外提供接口
QT_BEGIN_NAMESPACE
class QSortFilterProxyModel;
class QItemSelectionModel;
QT_END_NAMESPACE
// information about selected items in a model.
#include <QItemSelection>
//a stack of tabbed widgets.
#include <QTabWidget>
// a abstract model of table
#include <QAbstractTableModel>
#include <QtWidgets>
void AddressWidget::setupTabs()
{
QStringList groups;
groups << "ABC" << "DEF" << "GHI" << "JKL" << "MNO" << "PQR" << "STU" << "VW" << "XYZ";
//
for (int i = 0; i < groups.size(); ++i) {
QString str = groups.at(i);
// regular expression
QString regExp = QString("^[%1].*").arg(str);
proxyModel = new QSortFilterProxyModel(this);
//model提供在其他的model和view之间排序和过滤数据
proxyModel->setSourceModel(table);
proxyModel->setFilterRegExp(QRegExp(regExp, Qt::CaseInsensitive));
proxyModel->setFilterKeyColumn(0);
QTableView *tableView = new QTableView;
tableView->setModel(proxyModel);
tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
tableView->horizontalHeader()->setStretchLastSection(true);
tableView->verticalHeader()->hide();
tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
tableView->setSelectionMode(QAbstractItemView::SingleSelection);
tableView->setSortingEnabled(true);
//when modef change
connect(tableView->selectionModel(),
&QItemSelectionModel::selectionChanged,
this, &AddressWidget::selectionChanged);
connect(this, &QTabWidget::currentChanged, this, [this](int tabIndex) {
auto *tableView = qobject_cast<QTableView *>(widget(tabIndex));
if (tableView)
emit selectionChanged(tableView->selectionModel()->selection());
});
//tavble view
addTab(tableView, str);
}
}
void AddressWidget::removeEntry()
{ // point current table view
QTableView *temp = static_cast<QTableView*>(currentWidget());
//sort
QSortFilterProxyModel *proxy = static_cast<QSortFilterProxyModel*>(temp->model());
//item select
QItemSelectionModel *selectionModel = temp->selectionModel();
//indexs
QModelIndexList indexes = selectionModel->selectedRows();
//提供在其他的model和view之间排序和过滤数据
foreach (QModelIndex index, indexes) {
int row = proxy->mapToSource(index).row();
table->removeRows(row, 1, QModelIndex());
}
if (table->rowCount(QModelIndex()) == 0) {
insertTab(0, newAddressTab, "Address Book");
}
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
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** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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**
****************************************************************************/
#include "tablemodel.h"
//! [0]
TableModel::TableModel(QObject *parent)
: QAbstractTableModel(parent)
{
}
TableModel::TableModel(QList<Contact> contacts, QObject *parent)
: QAbstractTableModel(parent)
, contacts(contacts)
{
}
//! [0]
//! [1]
int TableModel::rowCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return contacts.size();
}
int TableModel::columnCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return 2;
}
//! [1]
//! [2]
QVariant TableModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (index.row() >= contacts.size() || index.row() < 0)
return QVariant();
if (role == Qt::DisplayRole) {
const auto &contact = contacts.at(index.row());
if (index.column() == 0)
return contact.name;
else if (index.column() == 1)
return contact.address;
}
return QVariant();
}
//! [2]
//! [3]
QVariant TableModel::headerData(int section, Qt::Orientation orientation, int role) const
{
if (role != Qt::DisplayRole)
return QVariant();
if (orientation == Qt::Horizontal) {
switch (section) {
case 0:
return tr("Name");
case 1:
return tr("Address");
default:
return QVariant();
}
}
return QVariant();
}
//! [3]
//! [4]
bool TableModel::insertRows(int position, int rows, const QModelIndex &index)
{
Q_UNUSED(index);
beginInsertRows(QModelIndex(), position, position + rows - 1);
for (int row = 0; row < rows; ++row)
contacts.insert(position, { QString(), QString() });
endInsertRows();
return true;
}
//! [4]
//! [5]
bool TableModel::removeRows(int position, int rows, const QModelIndex &index)
{
Q_UNUSED(index);
beginRemoveRows(QModelIndex(), position, position + rows - 1);
for (int row = 0; row < rows; ++row)
contacts.removeAt(position);
endRemoveRows();
return true;
}
//! [5]
//! [6]
bool TableModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
if (index.isValid() && role == Qt::EditRole) {
int row = index.row();
auto contact = contacts.value(row);
if (index.column() == 0)
contact.name = value.toString();
else if (index.column() == 1)
contact.address = value.toString();
else
return false;
contacts.replace(row, contact);
emit(dataChanged(index, index));
return true;
}
return false;
}
//! [6]
//! [7]
Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
{
if (!index.isValid())
return Qt::ItemIsEnabled;
return QAbstractTableModel::flags(index) | Qt::ItemIsEditable;
}
//! [7]
//! [8]
QList<Contact> TableModel::getContacts() const
{
return contacts;
}
//! [8]
}
