void OnFocusInEvent(X11.XFocusChangeEvent ev)
{
var title = WindowIndexByFrame[ev.window].title;
var frame = ev.window;
Xlib.XSetWindowBorder(this.display, frame, this.Colours.ActiveFrameColor);
Xlib.XSetWindowBackground(this.display, title, this.Colours.ActiveTitleColor);
Xlib.XSetWindowBorder(this.display, title, this.Colours.ActiveTitleBorder);
Xlib.XClearWindow(this.display, title); // Force colour update
UpdateWindowTitle(title); //Redraw the title, purged by clearing.
}
public WindowManager(SimpleLogger.LogLevel level)
{
this.Log = new SimpleLogger(level);
var pDisplayText = Xlib.XDisplayName(null);
var DisplayText = Marshal.PtrToStringAnsi(pDisplayText);
if (DisplayText == String.Empty)
{
Log.Error("No display configured for X11; check the value of the DISPLAY variable is set correctly");
Environment.Exit(1);
}
Log.Info($"Connecting to X11 Display {DisplayText}");
this.display = Xlib.XOpenDisplay(null);
if (display == IntPtr.Zero)
{
Log.Error("Unable to open the default X display");
Environment.Exit(1);
}
this.root = Xlib.XDefaultRootWindow(display);
OnError = this.ErrorHandler;
Xlib.XSetErrorHandler(OnError);
// This will trigger a bad access error if another window manager is already running
Xlib.XSelectInput(this.display, this.root,
EventMask.SubstructureRedirectMask | EventMask.SubstructureNotifyMask |
EventMask.ButtonPressMask | EventMask.KeyPressMask);
Xlib.XSync(this.display, false);
// Setup cursors
this.Cursors.DefaultCursor = Xlib.XCreateFontCursor(this.display, FontCursor.XC_left_ptr);
this.Cursors.TitleCursor = Xlib.XCreateFontCursor(this.display, FontCursor.XC_fleur);
this.Cursors.FrameCursor = Xlib.XCreateFontCursor(this.display, FontCursor.XC_sizing);
Xlib.XDefineCursor(this.display, this.root, this.Cursors.DefaultCursor);
// Setup colours
this.Colours.DesktopBackground = GetPixelByName("black");
this.Colours.WindowBackground = GetPixelByName("white");
this.Colours.InactiveTitleBorder = GetPixelByName("light slate grey");
this.Colours.InactiveTitleColor = GetPixelByName("slate grey");
this.Colours.InactiveFrameColor = GetPixelByName("dark slate grey");
this.Colours.ActiveFrameColor = GetPixelByName("dark goldenrod");
this.Colours.ActiveTitleColor = GetPixelByName("gold");
this.Colours.ActiveTitleBorder = GetPixelByName("saddle brown");
Xlib.XSetWindowBackground(this.display, this.root, this.Colours.DesktopBackground);
Xlib.XClearWindow(this.display, this.root); // force a redraw with the new background color
}
// Annoyingly, this event fires when an application quits itself, resuling in some bad window errors.
void OnFocusOutEvent(X11.XFocusChangeEvent ev)
{
var title = WindowIndexByFrame[ev.window].title;
var frame = ev.window;
if (Status.Failure == Xlib.XSetWindowBorder(this.display, frame, this.Colours.InactiveTitleBorder))
{
return; // If the windows have been destroyed asynchronously, cut this short.
}
Xlib.XSetWindowBackground(this.display, title, this.Colours.InactiveTitleColor);
Xlib.XSetWindowBorder(this.display, title, this.Colours.InactiveFrameColor);
Xlib.XClearWindow(this.display, title);
UpdateWindowTitle(title);
SetFocusTrap(WindowIndexByFrame[ev.window].child);
}
