app/internal/wm: implement ViewEvent for X11

Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>

app/internal/wm/os_unix.go

@@ -7,9 +7,15 @@ package wm
 
 import (
 	"errors"
+	"unsafe"
 )
 
-type ViewEvent struct{}
+type ViewEvent struct {
+	// Display is a pointer to the X11 Display created by XOpenDisplay.
+	Display unsafe.Pointer
+	// Window is the X11 window ID as returned by XCreateWindow.
+	Window uintptr
+}
 
 func Main() {
 	select {}

app/internal/wm/os_x11.go

@@ -690,8 +690,10 @@ func newX11Window(gioWin Callbacks, opts *Options) error {
 
 	go func() {
 		w.w.SetDriver(w)
+		w.w.Event(ViewEvent{Display: unsafe.Pointer(dpy), Window: uintptr(win)})
 		w.setStage(system.StageRunning)
 		w.loop()
+		w.w.Event(ViewEvent{})
 		w.destroy()
 	}()
 	return nil