How to achieve the size of video changes as the size of dialog changes?

[EricLiii]

Hi All,

I am a newbie to Qt. Now I have succeeded to play a video on a dialog. However, when I changed the size of dialog, the size of video didn't change. Please refer to the screenshot below.

The following is part of my code.

I used 'resize' to set up the size of video. If I comment the line 26, the dialog cannot show the full video.

So, anyone can help me to solve this problem? Btw, I use Qt5.

Thanks!

[JonB]

@EricLiii
I assume when you don't specify any size on the QVideoWidget it takes up its "natural" size, which is larger than the dialog.

You set its initial size. I presume you need to override http://doc.qt.io/qt-5/qdialog.html#resizeEvent and resize the QVideoWidget accordingly. You might also be interested in setting the QVideoWidget's setMinimum/MaximumSize() too.

[SGaist]

Hi,

Why not put your QVideoWidget inside a layout applied to your dialog ? The resizing will be donne automatically.

[EricLiii]

@JonB
Thanks for your help! I have solved this problem by using resizeEvent.
Thank you very much!

[EricLiii]

@SGaist
Thanks for your help!
I have solved this problem by using resizeEvent. I will try your method later. But for now I prefer to finish my project asap.
Anyway, thank you very much!

[JonB]

@EricLiii
Good. In the long- (short-) term, if @SGaist says a layout will auto-resize your image for you that will undoubtedly be easiest.