17.QT键盘

mainwindow.h

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include <QMainWindow>
 5 #include <QKeyEvent>
 6 
 7 namespace Ui {
 8 class MainWindow;
 9 }
10 
11 class MainWindow : public QMainWindow
12 {
13     Q_OBJECT
14 
15 public:
16     explicit MainWindow(QWidget *parent = 0);
17     ~MainWindow();
18 
19     void keyPressEvent(QKeyEvent *event);
20 private:
21     Ui::MainWindow *ui;
22 };
23 
24 #endif // MAINWINDOW_H

mainwindow.cpp

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 
 4 MainWindow::MainWindow(QWidget *parent) :
 5     QMainWindow(parent),
 6     ui(new Ui::MainWindow)
 7 {
 8     ui->setupUi(this);
 9 }
10 
11 MainWindow::~MainWindow()
12 {
13     delete ui;
14 }
15 
16 void MainWindow::keyPressEvent(QKeyEvent *event)
17 {
18     int x = ui->pushButton->x();
19     int y = ui->pushButton->y();
20     switch (event->key()) {
21     case Qt::Key_A:
22         ui->pushButton->move(x-10,y);
23         break;
24     case Qt::Key_D:
25         ui->pushButton->move(x+10,y); 
26         break;
27     case Qt::Key_W:
28         ui->pushButton->move(x,y-10);
29         break;
30     case Qt::Key_S:
31         ui->pushButton->move(x,y+10);
32         break;
33     default:
34         break;
35     }
36 }