About directdraw, Qt::FramelessWindowHint and Qt::WA_TranslucentBackground

[Gateslu]

Hi all,
recently, i have a project about dispaly video, and this project use the directdraw to display the video on the qwidget with QWidget::winId() which is a child widget in the QMainwindow, and it works.
but now there is a problem, when i use setWindowFlags(Qt::FramelessWindowHint | Qt::WindowMinimizeButtonHint ) and setAttribute(Qt::WA_TranslucentBackground) in the qmainwindow, the child widget dose not work, the video can not display, is anybody can help me? thank you!

[none]

I am probably not able to help you but I am interested in how you use directdraw - could you post a short code snippet that shows how you write the image data to the display?

[EdwardK]

Hi I'm busy with directdraw (qt) project I will post results when I have one

if someone has info on this please post it or maybe someone on qt team already done it , help appreciated :)

[vittalonline]

hi try this

videoScreen->setWindowFlags(videoScreen->windowFlags()| Qt::FramelessWindowHint);

and

setAttribute(Qt::WA_TranslucentBackground);

with

setAttribute(Qt::WA_NoSystemBackground,false);
setStyleSheet("background-color: rgba(0,0,0,100%);"
              "border:1px solid gray;"
              "border-radius: 0px;"
              );

working fine..