QT: implementation of irregular windows

Main ideas:
1: Set the form to Qt::framelesswindowhint (remove the title bar).
2: Use a part of the area is transparent image as the interface of the program, and the picture is transparent to the place to penetrate.

3: The mouse event of the overloaded program.

Runtime (light green is the desktop background)

Source:

[CPP]View Plaincopyprint?

2. #include <QtGui>
6. Class Irregularwidget: Public qwidget
8. {
10. Q_object
12. Public
14. Irregularwidget (Qwidget *parent = 0);
18. Protected
20. void Mousepressevent (Qmouseevent *event);
22. void Mousemoveevent (Qmouseevent *event);
24. void PaintEvent (Qpaintevent *event);
26. void Enterevent (Qevent *event);
28. void Leaveevent (Qevent *event);
32. Private
34. Qpoint M_currentpos;
36. Qpixmap M_pixmap;
38. };
42. Irregularwidget::irregularwidget (Qwidget *parent)
44. : Qwidget (parent, Qt::framelesswindowhint)
46. {
48. Setwindowtitle ("Irregular widget");
50. //Load a picture that has some area that is transparent as a program interface
52. M_pixmap.load ("delete.png");
54. Resize (m_pixmap.size ());
56. ///Irregular window key, make the picture transparent place to penetrate
58. Setmask (M_pixmap.mask ());
60. }
64. void Irregularwidget::mousepressevent (Qmouseevent *event)
66. {
68. //Press the left button to move the window, press the right button to close the program
70. if (event->button () = = Qt::leftbutton)
72. {
74. M_currentpos = Event->globalpos ()-Framegeometry (). TopLeft ();
76. Event->accept ();
78. }
80. Else if (event->button () = = Qt::rightbutton)
82. Close ();
84. }
88. void Irregularwidget::mousemoveevent (Qmouseevent *event)
90. {
92. if (event->buttons () && Qt::leftbutton)
94. {
96. Move (Event->globalpos ()-m_currentpos);
98. Event->accept ();
100. }
102. }
106. void Irregularwidget::p aintevent (qpaintevent *event)
108. {
110. qpainter painter (this);
112. Painter.drawpixmap (0, 0, m_pixmap);
114. }
118. void Irregularwidget::leaveevent (Qevent *event)
120. {
122. //The mouse is a normal pointer when it leaves the window
124. SetCursor (Qt::arrowcursor);
126. }
130. void Irregularwidget::enterevent (Qevent *event)
132. {
134. //Mouse is a finger when left on the window
136. SetCursor (Qt::P ointinghandcursor);
138. }
142. #include "Main.moc"
146. int main (int argc, char *argv[])
148. {
150. Qapplication app (argc, argv);
152. Irregularwidget *widget = new Irregularwidget;
154. Widget->show ();
156. return app.exec ();
158. }

http://blog.csdn.net/small_qch/article/details/7054750

QT: implementation of irregular windows