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justhomework/SoftwareDesign/Lab2/lab2-3-5_KeyEvent/mainwindow.cpp

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#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
}
MainWindow::~MainWindow() { delete ui; }
void MainWindow::keyPressEvent(QKeyEvent *event) {
if (event->key() == Qt::Key_Up) {
ui->l->move(ui->l->pos().x(), ui->l->pos().y() - 20);
} else if (event->key() == Qt::Key_Down) {
ui->l->move(ui->l->pos().x(), ui->l->pos().y() + 20);
} else if (event->key() == Qt::Key_Left) {
ui->l->move(ui->l->pos().x() - 20, ui->l->pos().y());
} else if (event->key() == Qt::Key_Right) {
ui->l->move(ui->l->pos().x() + 20, ui->l->pos().y());
}
}
void MainWindow::keyReleaseEvent(QKeyEvent *e) {
if (e->key() == Qt::Key_Up) {
ui->l->move(ui->l->pos().x(), ui->l->pos().y() + 20);
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} else if (e->key() == Qt::Key_Down) {
ui->l->move(ui->l->pos().x(), ui->l->pos().y() - 20);
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} else if (e->key() == Qt::Key_Left) {
ui->l->move(ui->l->pos().x() + 20, ui->l->pos().y());
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} else if (e->key() == Qt::Key_Right) {
ui->l->move(ui->l->pos().x() - 20, ui->l->pos().y());
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}
}