QT笔记之不规则窗口的实现

 1 #ifndef QANORMALYDLG_H
 2 #define QANORMALYDLG_H
 3 
 4 #include <QWidget>
 5 #include "ui_qanormalydlg.h"
 6 
 7 class QAnormalyDlg : public QWidget
 8 {
 9     Q_OBJECT
10 
11 public:
12     QAnormalyDlg(QWidget *parent = 0);
13     ~QAnormalyDlg();
14 
15     void paintEvent(QPaintEvent *e);
16 
17     void mousePressEvent(QMouseEvent *e);
18 
19     void mouseMoveEvent(QMouseEvent *e);
20 private:
21     Ui::QAnormalyDlg ui;
22 
23     QPoint move_point; //移动的距离
24 };
25 
26 #endif // QANORMALYDLG_H

 1 #include "qanormalydlg.h"
 2 #include <QPainter>
 3 #include <QMouseEvent>
 4 
 5 QAnormalyDlg::QAnormalyDlg(QWidget *parent)
 6     : QWidget(parent)
 7 {
 8     ui.setupUi(this);
 9 
10     //去表框  同时保留窗口原有的属性
11     setWindowFlags(Qt::FramelessWindowHint | windowFlags() );
12 
13     //把窗口背景设为透明
14     setAttribute(Qt::WA_TranslucentBackground);
15 
16     resize(600,652);
17 }
18 
19 QAnormalyDlg::~QAnormalyDlg()
20 {
21 
22 }
23 
24 void QAnormalyDlg::paintEvent(QPaintEvent *e)
25 {
26     QPainter p(this);
27     p.drawPixmap(0, 0, QPixmap("122.png"));
28 }
29 
30 void QAnormalyDlg::mousePressEvent(QMouseEvent *e)
31 {
32     if (e->button() == Qt::RightButton)
33     {
34         //右键关闭窗口
35         close();
36     }
37 
38     else if (e->button() == Qt::LeftButton)
39     {
40         //求坐标差，当前鼠标坐标 - 窗口左上角坐标
41         //frameGeometry返回窗口的矩形坐标， topLeft返回窗口左上角点的坐标
42         //move_point = e->globalPos() - this->frameGeometry().topLeft();
43         move_point = e->globalPos() - this->pos();
44     }
45 }
46 
47 void QAnormalyDlg::mouseMoveEvent(QMouseEvent *e)
48 {
49     if (e->buttons() & Qt::LeftButton)
50     {
51         move(e->globalPos()-move_point);
52     }
53 }