public LinuxX11WindowImpl(LinuxX11Platform platform,
int width,
int height)
{
_platform = platform;
X11.XSetWindowAttributes attributes = new X11.XSetWindowAttributes();
var screen = Xlib.XDefaultScreen(_platform.Display);
_visual = Xlib.XDefaultVisual(_platform.Display, screen);
var depth = Xlib.XDefaultDepth(_platform.Display, screen);
attributes.background_pixel = 0;
attributes.bit_gravity = 10;
_window = Xlib.XCreateWindow(platform.Display,
Xlib.XDefaultRootWindow(platform.Display),
300,
300,
(uint)width,
(uint)height,
1,
depth,
1,
_visual,
1 << 1 | 1 << 4,
ref attributes);
Xlib.XSelectInput(platform.Display, _window, X11.EventMask.ExposureMask |
X11.EventMask.StructureNotifyMask |
X11.EventMask.EnterWindowMask |
X11.EventMask.LeaveWindowMask |
X11.EventMask.PointerMotionMask);
}
public void UpdateBackground(IBrush brush)
{
if (brush is not SolidColorBrush solidColor)
{
return;
}
X11.XColor color = new X11.XColor();
var colormap = Xlib.XDefaultColormap(_platform.Display,
Xlib.XDefaultScreen(_platform.Display));
var status = Xlib.XParseColor(_platform.Display,
colormap,
$"RGBi:{solidColor.Red}/{solidColor.Green}/{solidColor.Blue}",
ref color);
//Not sure if XLib.XFreeColors should be called here.
//The API is different and XColor is allocated by the .Net
//It is probably should be called to remove Colormap entry
status = Xlib.XAllocColor(_platform.Display, colormap, ref color);
Xlib.XSetWindowBackground(_platform.Display,
XWindow,
color.pixel);
}