1 #ifndef MAINWINDOW_H
2 #define MAINWINDOW_H
3
4 #include <QMainWindow>
5
6 namespace Ui {
7 class MainWindow;
8 }
9
10 class MainWindow : public QMainWindow
11 {
12 Q_OBJECT
13
14 public:
15 explicit MainWindow(QWidget *parent = 0);
16 ~MainWindow();
17
18 protected:
19 void paintEvent(QPaintEvent *event);
20 void mousePressEvent(QMouseEvent *event);
21 void mouseMoveEvent(QMouseEvent *event);
22 void mouseReleaseEvent(QMouseEvent *event);
23
24 private:
25 Ui::MainWindow *ui;
26
27 QPoint m_pos;
28 bool m_drag;
29 };
30
31 #endif // MAINWINDOW_H
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3
4 #include <QPainter>
5 #include <QBitmap>
6 #include <QMouseEvent>
7
8 MainWindow::MainWindow(QWidget *parent)
9 : QMainWindow(parent),
10 ui(new Ui::MainWindow)
11 {
12 ui->setupUi(this);
13
14 ui->menuBar->close();
15 ui->mainToolBar->close();
16 ui->statusBar->close();
17
18 setFixedSize(400, 300);
19 setWindowFlags(Qt::FramelessWindowHint);
20
21 m_drag = false;
22 }
23
24 MainWindow::~MainWindow()
25 {
26 delete ui;
27 }
28
29 void MainWindow::paintEvent(QPaintEvent *event)
30 {
31 Q_UNUSED(event);
32 QBitmap bitmap(this->size());
33 QPainter painter(&bitmap);
34 painter.fillRect(this->rect(), Qt::white);
35 painter.setBrush(QColor(0, 0, 0));
36 painter.setRenderHint(QPainter::Antialiasing);
37 painter.setPen(QPen(Qt::blue, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
38 painter.drawRoundedRect(this->rect(), 4, 4);
39 this->setMask(bitmap);
40 }
41
42 void MainWindow::mousePressEvent(QMouseEvent *event)
43 {
44 if (Qt::LeftButton == event->button()) {
45 m_drag = true;
46 m_pos = event->pos();
47 }
48 }
49
50 void MainWindow::mouseMoveEvent(QMouseEvent *event)
51 {
52 Q_UNUSED(event);
53
54 if (m_drag) {
55 this->move(event->globalPos() - m_pos);
56 }
57 }
58
59 void MainWindow::mouseReleaseEvent(QMouseEvent *event)
60 {
61 Q_UNUSED(event);
62 m_drag = false;
63 }
