xlib and child windows (repaint)

SteQve · 03-09-2005, 09:12 AM

When I create a child window with xcreatewindow, is there any message sent to that window that says it should repaint?

I have a main-loop, and in there i'd like to be notified when its time to repaint main window, childs and so on.

In windows (well...I'm from "that" side) you receive a WM_PAINT when you should repaint window. I cannot find a notify-message that fit. Probably I use Xlib in a wrong way...

DaFrawg · 03-09-2005, 09:21 AM

I'm trying to switch from (the crappy) Win32 to Linux too, but I think I have a longer way ahead of me than you

Quoting from this site:

Quote:

To repaint the window and its background, use XClearWindow. Setting the border or changing the background such that the border tile origin changes causes the border to be repainted.

In Windows, this would be equivalent to sending a WM_PAINT (and a WM_NCPAINT) to the window. I have no idea to choose wether the background should be cleared or not (in Windows you just say TRUE or FALSE when you get WM_ERASEBACKGROUND). I'm also not sure if it will repaint the child windows, but I guess the page I referred to can help you at least a bit.

SteQve · 03-09-2005, 11:17 AM

Well...it was the VisibilityNotify i was looking for...

Two short (?) questions:

1. How to create a roundrect window? Like the windows on the taskbar?
2. Can I assign any userdata to a Window variable? I'd like to assign every Window object in X with a pointer to a class....possible? In Window you call SetWindowLong(...) and you can set some data...Any eqaul in X?

Thanks in advance =)

DaFrawg · 03-10-2005, 10:18 AM

No clue. Again, I have no Xlib experience at all. I just googled.

SteQve · 03-10-2005, 10:33 AM

maybe there is another forum where I can ask my very "low level" X questions? I sort of don't like mail-lists, and XFree86 doesn't provide any forum...

keefaz · 03-10-2005, 11:31 AM

You have to use the X shape extension to create a roundrect window
http://m3d.uib.es/grafica2/Mesa-3.1/xdemos/shape.c