326 lines
12 KiB
C++
326 lines
12 KiB
C++
#include "ExQStandardItemModel.h"
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#include "ui_ExQStandardItemModel.h"
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#include <QDebug>
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#include <QFileDialog>
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#include <QFont>
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#include <QTextStream>
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#define COLUMN 6 //数据表的列数
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ExQStandardItemModel::ExQStandardItemModel(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::ExQStandardItemModel)
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{
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ui->setupUi(this);
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setWindowTitle(QObject::tr("QTableView和QStandardItemModel的用法"));
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ui->mainToolBar->setToolButtonStyle(Qt::ToolButtonTextUnderIcon); //设置主工具栏的图标样式风格
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m_labCurrFile = new QLabel("当前文件：", this); //设置状态栏
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m_labCellPos = new QLabel("当前单元格：", this);
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m_labCellText = new QLabel("单元格内容：", this);
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m_labCurrFile->setMinimumWidth(200);
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m_labCellPos->setMinimumWidth(200);
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m_labCellText->setMinimumWidth(200);
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ui->statusBar->addWidget(m_labCurrFile);
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ui->statusBar->addWidget(m_labCellPos);
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ui->statusBar->addWidget(m_labCellText);
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m_model = new QStandardItemModel(2, COLUMN, this); //设置数据模型，一开始设置为默认的2行6列表的一个表
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m_selectModet = new QItemSelectionModel(m_model, this); //设置选择模型
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ui->tableView->setModel(m_model); //设置数据模型
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ui->tableView->setSelectionModel(m_selectModet); //设置选择模型
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ui->tableView->setSelectionMode(QAbstractItemView::ExtendedSelection); //设置选择模式
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ui->tableView->setSelectionBehavior(QAbstractItemView::SelectItems); //设置选择行为
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connect(m_selectModet, SIGNAL(currentChanged(QModelIndex, QModelIndex)), this, SLOT(onCurrentChanged(QModelIndex, QModelIndex))); //选择当前单元格变化时的信号与槽
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}
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ExQStandardItemModel::~ExQStandardItemModel()
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{
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delete ui;
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}
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//从list初始化数据模型QTableView里面
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void ExQStandardItemModel::init(QStringList &list)
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{
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int rowCount = list.count(); //文本行数，第一行为表头
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m_model->setRowCount(rowCount - 1);
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QString header = list.at(0);
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QStringList headerList = header.split(QRegExp("\\s+"), QString::SkipEmptyParts); //通过一个或者多个空格或者tab按键切割
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m_model->setHorizontalHeaderLabels(headerList); //设置表头
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QStandardItem *item = nullptr; //此处开始，设置表格数据
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QStringList tempList;
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int j = 0;
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for (int i = 1; i < rowCount; i++) {
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QString aLineText = list.at(i);
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tempList = aLineText.split(QRegExp("\\s+"), QString::SkipEmptyParts);//正则表达式中\s匹配任何空白字符，包括空格、制表符、换页符等等, 等价于[ \f\n\r\t\v]
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for ( j = 0; j < COLUMN - 1; j++) { //设置前5列的item
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if (j == 3) {
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ExDelegate *itemDelegate = new ExDelegate();
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ui->tableView->setItemDelegateForColumn(3, itemDelegate);
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}
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item = new QStandardItem(tempList.at(j));
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m_model->setItem(i - 1, j, item);
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}
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item = new QStandardItem(tempList.at(j)); //最后一列的item
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item->setCheckable(true); //设置有检查框
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if ( tempList.at(j) == "https://www.google.com")
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item->setCheckState(Qt::Unchecked);
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else
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item->setCheckState(Qt::Checked);
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m_model->setItem(i - 1, COLUMN -1, item);
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}
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}
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//当前单元格发生变化时
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void ExQStandardItemModel::onCurrentChanged(const QModelIndex ¤t, const QModelIndex &previous)
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{
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if (current.isValid()) { //当前模型索性有效
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m_labCellPos->setText(QString("当前单元格：%1行, %2列").arg(current.row()).arg(current.column()));
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QStandardItem *item = m_model->itemFromIndex(current); //从模型索引获得Item
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m_labCellText->setText(QString("当前文件：%1").arg(item->text())); //显示item的文字内容
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QFont font = item->font();
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ui->actBold->setChecked(font.bold()); //更新actFontBold的check状态
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}
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}
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//action+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//打开和导入文件，并且在plainTextEdit里面显示
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void ExQStandardItemModel::on_actOpen_triggered()
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{
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QString currPath = QCoreApplication::applicationDirPath();
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QString fileName = QFileDialog::getOpenFileName(this, "打开一个文件", currPath, "导入数据文件(*txt);;所有文件(*.*)");
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if (fileName.isEmpty())
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return;
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QStringList list;
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QFile file(fileName);
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if (file.open(QIODevice::ReadOnly | QIODevice::Text)) { //只读形式打开文本文件
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QTextStream stream(&file); //用文本流读取文件
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ui->plainTextEdit->clear();
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while (!stream.atEnd()) { //读取文本中文本的内容
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QString str = stream.readLine();
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ui->plainTextEdit->appendPlainText(str);
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list.append(str);
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}
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file.close(); //关闭
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m_labCurrFile->setText("当前文件：" + fileName); //设置状态栏
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ui->actAppend->setEnabled(true); //设置action的Enabled的属性
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ui->actInsert->setEnabled(true);
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ui->actDelete->setEnabled(true);
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ui->actSave->setEnabled(true);
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}
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init(list); //初始化.txt的数据
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}
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//在表格的最后一行添加一行
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void ExQStandardItemModel::on_actAppend_triggered()
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{
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QList<QStandardItem *> list;
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QStandardItem *item;
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//获取表头前五列
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for (int i = 0; i < COLUMN - 1; i++) {
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item = new QStandardItem("添加一行");
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list<<item;
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}
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//获取最后一列
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QString str = m_model->headerData(m_model->columnCount() - 1, Qt::Horizontal, Qt::DisplayRole).toString();
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item = new QStandardItem(str + "添加一行");
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item->setCheckable(true);
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list<<item;
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m_model->insertRow(m_model->rowCount(), list);
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QModelIndex currIndex = m_model->index(m_model->rowCount() - 1, 0); //创建最后一行的ModelIndex
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m_selectModet->clearSelection();
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m_selectModet->setCurrentIndex(currIndex, QItemSelectionModel::Select);
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}
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//保存文件
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void ExQStandardItemModel::on_actSave_triggered()
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{
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QString path = QCoreApplication::applicationDirPath();
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QString fileName = QFileDialog::getSaveFileName(this, tr("选择一个文件"), path, "另存数据(*.txt);;所有数据(*.*)");
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if ( fileName.isEmpty())
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return;
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QFile file(fileName);
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if (!(file.open(QIODevice::ReadWrite | QIODevice::Text | QIODevice::Truncate))) //读写，文本，覆盖原有内容打开
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return;
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QTextStream stream(&file); //用文本流读取文件
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QStandardItem *item;
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int i = 0 ;
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int j = 0;
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QString str = "";
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ui->plainTextEdit->clear();
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//获取表头文字
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for (i = 0; i < m_model->columnCount(); i++) {
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item = m_model->horizontalHeaderItem(i);
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str = str + item->text() + "\t\t"; //以TAB按键隔开
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}
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stream<<str<<"\n";
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ui->plainTextEdit->appendPlainText(str);
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//获取数据区文字
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for (i = 1; i < m_model->rowCount(); i++) {
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str = "";
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for (j = 0; j < m_model->columnCount(); j++) {
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item = m_model->item(i, j);
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str = str + item->text() + "\t\t";
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}
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stream<<str<<"\n";
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ui->plainTextEdit->appendPlainText(str);
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}
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}
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//在当前选中的一行，其前面插入一行
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void ExQStandardItemModel::on_actInsert_triggered()
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{
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QList<QStandardItem *> list;
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QStandardItem *item;
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for (int i = 0; i < COLUMN - 1; i++) {
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item = new QStandardItem("插入一行");
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list<<item;
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}
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QString str = m_model->headerData(m_model->columnCount() - 1, Qt::Horizontal, Qt::DisplayRole).toString();
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item = new QStandardItem(str + "插入一行");
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item->setCheckable(true);
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list<<item;
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QModelIndex currIndex = m_selectModet->currentIndex();
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m_model->insertRow(currIndex.row(), list); //在当前行的前面插入一行
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m_selectModet->clearSelection();
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m_selectModet->setCurrentIndex(currIndex, QItemSelectionModel::Select);
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}
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//删除一行
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void ExQStandardItemModel::on_actDelete_triggered()
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{
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QModelIndex currIndex = m_selectModet->currentIndex();
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m_model->removeRow(currIndex.row());
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}
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//关闭退出
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void ExQStandardItemModel::on_actExit_triggered()
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{
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close();
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}
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//预览数据模型:模型数据导出到PlainTextEdit显示
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void ExQStandardItemModel::on_actModelData_triggered()
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{ //用文本流读取文件
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QStandardItem *item;
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int i = 0 ;
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int j = 0;
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QString str = "";
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ui->plainTextEdit->clear();
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//获取表头文字
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for (i = 0; i < m_model->columnCount(); i++) {
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item = m_model->horizontalHeaderItem(i);
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str = str + item->text() + "\t\t"; //以TAB按键隔开
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}
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ui->plainTextEdit->appendPlainText(str);
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//获取数据区文字
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for (i = 1; i < m_model->rowCount(); i++) {
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str = "";
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for (j = 0; j < m_model->columnCount(); j++) {
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item = m_model->item(i, j);
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str = str + item->text() + "\t\t";
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}
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ui->plainTextEdit->appendPlainText(str);
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}
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}
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//左对齐
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void ExQStandardItemModel::on_actAlignLeft_triggered()
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{
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if (!m_selectModet->hasSelection())
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return;
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QModelIndexList list = m_selectModet->selectedIndexes(); //获得选中的List<item>
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for (int i = 0; i < list.count(); i++) {
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QModelIndex index = list.at(i);
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QStandardItem *item = m_model->itemFromIndex(index);
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item->setTextAlignment(Qt::AlignLeft); //设置文本左对齐
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}
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}
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//文本居中
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void ExQStandardItemModel::on_actAlignCenter_triggered()
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{
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if (!m_selectModet->hasSelection())
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return;
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QModelIndexList list = m_selectModet->selectedIndexes(); //获得选中的List<item>
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for (int i = 0; i < list.count(); i++) {
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QModelIndex index = list.at(i); //获取一个模型索引
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QStandardItem *item = m_model->itemFromIndex(index);
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item->setTextAlignment(Qt::AlignCenter); //设置文本居中
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}
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}
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//文本右对齐
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void ExQStandardItemModel::on_actAlingRight_triggered()
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{
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if (!m_selectModet->hasSelection())
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return;
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QModelIndexList list = m_selectModet->selectedIndexes();
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for (int i = 0; i < list.count(); i++) {
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QModelIndex index = list.at(i);
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QStandardItem *item = m_model->itemFromIndex(index);
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item->setTextAlignment(Qt::AlignRight);
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}
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}
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//文本加粗
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void ExQStandardItemModel::on_actBold_triggered(bool checked)
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{
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if (!m_selectModet->hasSelection())
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return;
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QModelIndexList list = m_selectModet->selectedIndexes();
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for (int i = 0; i < list.count(); i++) {
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QModelIndex index = list.at(i);
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QStandardItem *item = m_model->itemFromIndex(index);
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QFont font = item->font();
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font.setBold(checked);
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item->setFont(font);
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}
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}
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