QT学习Demo例程2

#include "mainwindow.h" #include "ui_mainwindow.h" void startQTimer(MainWindow* parent); MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); translator = new QTranslator(this); isChinese = true; initListWidget(); initTableWidget(); initComboBox(); initSmallWidget(); initLabel(); // 启动定时器 timerId1 = startTimer(1000); timerId2 = startTimer(2000); startQTimer(this); } void MainWindow::changeEvent(QEvent *e) { switch (e->type()) { case QEvent::LanguageChange: ui->retranslateUi(this); if (!isChinese && ui->comboBox->currentIndex() == 0) { ui->selectLanguangeComboBox->setCurrentIndex(1); } break; default: break; } } void MainWindow::on_selectLanguangeComboBox_activated(int index) { switch(index) { // chinese case 0: translator->load(":/language/res/ListTableWidgetTest_CN.qm"); isChinese = true; break; // english case 1: translator->load(":/language/res/ListTableWidgetTest_EN.qm"); isChinese = false; break; default: break; } qApp->installTranslator(translator); ui->retranslateUi(this); } /** * 2. override eventFilter * * @brief MainWindow::eventFilter * @param object * @param e * @return */ bool MainWindow::eventFilter(QObject* object, QEvent* e) { if (object == ui->label) { // 拦截处理鼠标按下事件 if (e->type() == QEvent::MouseButtonPress) { QMouseEvent* event = static_cast<QMouseEvent*>(e); handleMousePressEvent(event, "eventFilter()"); return true; } } return QMainWindow::eventFilter(object, e); } void MainWindow::initLabel() { //1. install event filter ui->label->installEventFilter(this); } void startQTimer(MainWindow* parent) { QTimer* timer = new QTimer(parent); parent->connect(timer, &QTimer::timeout, parent, [=](){ static int num = 1; parent->getUi()->label_3->setText(QString::number(num++)); }); timer->start(500); parent->connect(parent->getUi()->pauseButton, &QPushButton::clicked, parent, [=](){ timer->stop(); }); parent->connect(parent->getUi()->resumeButton, &QPushButton::clicked, parent, [=](){ timer->start(500); }); } void MainWindow::timerEvent(QTimerEvent* event) { if (event ->timerId() == timerId1) { onTimer1Event(event); } else if (event->timerId() == timerId2) { onTimer2Event(event); } } Ui::MainWindow *MainWindow::getUi() const { return ui; } void MainWindow::onTimer1Event(QTimerEvent* event) { static int num = 1; ui->label->setText(QString::number(num++)); } void MainWindow::onTimer2Event(QTimerEvent* event) { static int num = 1; ui->label_2->setText(QString::number(num++)); } void MainWindow::initSmallWidget(){ connect(ui->getValueButton, &QPushButton::clicked, this, [=](){ qDebug() << ui->widget->getValue(); }); connect(ui->setHalfButton, &QPushButton::clicked, this, [=](){ ui->widget->setValue(50); }); } void MainWindow::initComboBox() { ui->comboBox->addItem("Benz"); ui->comboBox->addItem("BMW"); ui->comboBox->addItem("125 Moto"); connect(ui->selectCarPushButton, &QPushButton::clicked, this, [=](){ // ui->comboBox->setCurrentIndex(2); ui->comboBox->setCurrentText("BMW"); }); } void MainWindow::initTableWidget() { ui->tableWidget->setColumnCount(3); ui->tableWidget->setRowCount(5); ui->tableWidget->setHorizontalHeaderLabels(QStringList()<<"Name" << "Sex" << "Age"); QStringList nameList; nameList << "yase" << "zhoayun" << "zhangfei" << "guanyu" << "huamulan"; QList<QString> sexList; sexList<< "Male" << "Male" << "Male" << "Male" << "Female"; for (int i = 0; i < 5; i++) { int columnIndex = 0; ui->tableWidget->setItem(i, columnIndex++, new QTableWidgetItem(nameList[i])); ui->tableWidget->setItem(i, columnIndex++, new QTableWidgetItem(sexList[i])); ui->tableWidget->setItem(i, columnIndex++, new QTableWidgetItem(QString::number(i))); } } void MainWindow::initListWidget() { // QListWidgetItem* item = new QListWidgetItem("Hello hello, jin gou bei, jin goubei"); // item->setTextAlignment(Qt::AlignHCenter); // ui->listWidget->addItem(item); QStringList list; list << "Hello hello, jin gou bei, jin goubei" << "Hello hello, jin gou bei, jin goubei" << "Hello hello, jin gou bei, jin goubei" << "Hello hello, jin gou bei, jin goubei"; ui->listWidget->addItems(list); } MainWindow::~MainWindow() { delete ui; }