Create a fallback shellSurface in wl_shell::get_shell_surface

This makes QWaylandShellPrivate::shell_get_shell_surface behave
similarly to QWaylandCompositorPrivate::compositor_create_surface.

First, a signal is emitted letting a compositor implementation create
its own subclass of QWaylandShellSurface if desired. If it's not
created, a plain QWaylandShellSurface is created instead.

It also makes the API more consistent, as the creation of shell surfaces
now mimick the creation of surfaces and xdg surfaces.

qwindow-compositor has been updated to take advantage of the new API

Change-Id: I7c7262dd253dc37843e8e471a4ead5f6e87b0ced
Reviewed-by: Giulio Camuffo <giulio.camuffo@kdab.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/compositor/extensions/qwaylandwlshell.h b/src/compositor/extensions/qwaylandwlshell.h
index 2420f4cd0..12905549e 100644
--- a/src/compositor/extensions/qwaylandwlshell.h
+++ b/src/compositor/extensions/qwaylandwlshell.h
@@ -51,6 +51,7 @@ class QWaylandClient;
 class QWaylandInputDevice;
 class QWaylandOutput;
 class QWaylandSurfaceRole;
+class QWaylandWlShellSurface;
 
 class Q_WAYLAND_COMPOSITOR_EXPORT QWaylandWlShell : public QWaylandExtensionTemplate<QWaylandWlShell>
 {
@@ -67,6 +68,7 @@ public:
 
 Q_SIGNALS:
     void createShellSurface(QWaylandSurface *surface, const QWaylandResource &resource);
+    void shellSurfaceCreated(QWaylandWlShellSurface *shellSurface);
 };
 
 class Q_WAYLAND_COMPOSITOR_EXPORT QWaylandWlShellSurface : public QWaylandExtensionTemplate<QWaylandWlShellSurface>