wayland_xdg_surface_t - Man Page

enum class wrapper_type { standard, display, foreign, proxy_wrapper }

xdg_toplevel_t get_toplevel ()
assign the xdg_toplevel surface role
xdg_popup_t get_popup (xdg_surface_t const &parent, xdg_positioner_t const &positioner)
assign the xdg_popup surface role
void set_window_geometry (int32_t x, int32_t y, int32_t width, int32_t height)
set the new window geometry
void ack_configure (uint32_t serial)
ack a configure event
std::function< void(uint32_t)> & on_configure ()
suggest a surface change
uint32_t get_id () const
Get the id of a proxy object.
std::string get_class () const
Get the interface name (class) of a proxy object.
uint32_t get_version () const
Get the protocol object version of a proxy object.
wrapper_type get_wrapper_type () const
Get the type of a proxy object.
void set_queue (event_queue_t queue)
Assign a proxy to an event queue.
wl_proxy * c_ptr () const
Get a pointer to the underlying C struct.
bool proxy_has_object () const
Check whether this wrapper actually wraps an object.
operator bool () const
Check whether this wrapper actually wraps an object.
bool operator== (const proxy_t &right) const
Check whether two wrappers refer to the same object.
bool operator!= (const proxy_t &right) const
Check whether two wrappers refer to different objects.
void proxy_release ()
Release the wrapped object (if any), making this an empty wrapper.

static constexpr std::uint32_t get_toplevel_since_version = 1
Minimum protocol version required for the get_toplevel function.
static constexpr std::uint32_t get_popup_since_version = 1
Minimum protocol version required for the get_popup function.
static constexpr std::uint32_t set_window_geometry_since_version = 1
Minimum protocol version required for the set_window_geometry function.
static constexpr std::uint32_t ack_configure_since_version = 1
Minimum protocol version required for the ack_configure function.

Underlying wl_proxy type and properties of a proxy_t that affect construction, destruction, and event handling

Enumerator

standard

C pointer is a standard type compatible with wl_proxy*. Events are dispatched and it is destructed when the proxy_t is destructed. User data is set.

display

C pointer is a wl_display*. No events are dispatched, wl_display_disconnect is called when the proxy_t is destructed. User data is set.

foreign

C pointer is a standard type compatible with wl_proxy*, but another library owns it and it should not be touched in a way that could affect the operation of the other library. No events are dispatched, wl_proxy_destroy is not called when the proxy_t is destructed, user data is not touched. Consequently, there is no reference counting for the proxy_t. Lifetime of such wrappers should preferably be short to minimize the chance that the owning library decides to destroy the wl_proxy.

proxy_wrapper

C pointer is a wl_proxy* that was constructed with wl_proxy_create_wrapper. No events are dispatched, wl_proxy_wrapper_destroy is called when the proxy_t is destroyed. Reference counting is active. A reference to the proxy_t creating this proxy wrapper is held to extend its lifetime until after the proxy wrapper is destroyed.

Definition at line 116 of file wayland-client.hpp.

ack a configure event

Parameters

serial the serial from the configure event

When a configure event is received, if a client commits the surface in response to the configure event, then the client must make an ack_configure request sometime before the commit request, passing along the serial of the configure event.

For instance, for toplevel surfaces the compositor might use this information to move a surface to the top left only when the client has drawn itself for the maximized or fullscreen state.

If the client receives multiple configure events before it can respond to one, it only has to ack the last configure event.

A client is not required to commit immediately after sending an ack_configure request - it may even ack_configure several times before its next surface commit.

A client may send multiple ack_configure requests before committing, but only the last request sent before a commit indicates which configure event the client really is responding to.

Examples egl.cpp, and shm.cpp.

Definition at line 1261 of file wayland-client-protocol-extra.cpp.

Get a pointer to the underlying C struct.

Returns

The underlying wl_proxy wrapped by this proxy_t if it exists, otherwise an exception is thrown

Get the interface name (class) of a proxy object.

Returns

The interface name of the object associated with the proxy

Get the id of a proxy object.

Returns

The id the object associated with the proxy

assign the xdg_popup surface role

Parameters

parent
positioner

This creates an xdg_popup object for the given xdg_surface and gives the associated wl_surface the xdg_popup role.

If null is passed as a parent, a parent surface must be specified using some other protocol, before committing the initial state.

See the documentation of xdg_popup for more details about what an xdg_popup is and how it is used.

Definition at line 1248 of file wayland-client-protocol-extra.cpp.

assign the xdg_toplevel surface role This creates an xdg_toplevel object for the given xdg_surface and gives the associated wl_surface the xdg_toplevel role.

See the documentation of xdg_toplevel for more details about what an xdg_toplevel is and how it is used.

Examples egl.cpp, and shm.cpp.

Definition at line 1241 of file wayland-client-protocol-extra.cpp.

Get the protocol object version of a proxy object. Gets the protocol object version of a proxy object, or 0 if the proxy was created with unversioned API.

A returned value of 0 means that no version information is available, so the caller must make safe assumptions about the object's real version.

display_t will always return version 0.

Returns

The protocol object version of the proxy or 0

Get the type of a proxy object.

Definition at line 302 of file wayland-client.hpp.

suggest a surface change

Parameters

serial serial of the configure event

The configure event marks the end of a configure sequence. A configure sequence is a set of one or more events configuring the state of the xdg_surface, including the final xdg_surface.configure event.

Where applicable, xdg_surface surface roles will during a configure sequence extend this event as a latched state sent as events before the xdg_surface.configure event. Such events should be considered to make up a set of atomically applied configuration states, where the xdg_surface.configure commits the accumulated state.

Clients should arrange their surface for the new states, and then send an ack_configure request with the serial sent in this configure event at some point before committing the new surface.

If the client receives multiple configure events before it can respond to one, it is free to discard all but the last event it received.

Examples egl.cpp, and shm.cpp.

Definition at line 1267 of file wayland-client-protocol-extra.cpp.

Check whether this wrapper actually wraps an object.

Returns

true if there is an underlying object, false if this wrapper is empty

Check whether two wrappers refer to different objects.

Check whether two wrappers refer to the same object.

Check whether this wrapper actually wraps an object.

Returns

true if there is an underlying object, false if this wrapper is empty

Release the wrapped object (if any), making this an empty wrapper. Note that display_t instances cannot be released this way. Attempts to do so are ignored.

Examples foreign_display.cpp.

Assign a proxy to an event queue.

Parameters

queue The event queue that will handle this proxy

Assign proxy to event queue. Events coming from proxy will be queued in queue instead of the display's main queue.

See also: display_t::dispatch_queue().

Examples proxy_wrapper.cpp.

set the new window geometry

Parameters

x
y
width
height

The window geometry of a surface is its 'visible bounds' from the user's perspective. Client-side decorations often have invisible portions like drop-shadows which should be ignored for the purposes of aligning, placing and constraining windows.

The window geometry is double buffered, and will be applied at the time wl_surface.commit of the corresponding wl_surface is called.

When maintaining a position, the compositor should treat the (x, y) coordinate of the window geometry as the top left corner of the window. A client changing the (x, y) window geometry coordinate should in general not alter the position of the window.

Once the window geometry of the surface is set, it is not possible to unset it, and it will remain the same until set_window_geometry is called again, even if a new subsurface or buffer is attached.

If never set, the value is the full bounds of the surface, including any subsurfaces. This updates dynamically on every commit. This unset is meant for extremely simple clients.

The arguments are given in the surface-local coordinate space of the wl_surface associated with this xdg_surface.

The width and height must be greater than zero. Setting an invalid size will raise an error. When applied, the effective window geometry will be the set window geometry clamped to the bounding rectangle of the combined geometry of the surface of the xdg_surface and the associated subsurfaces.

Definition at line 1255 of file wayland-client-protocol-extra.cpp.

Minimum protocol version required for the ack_configure function.

Definition at line 1131 of file wayland-client-protocol-extra.hpp.

Minimum protocol version required for the get_popup function.

Definition at line 1058 of file wayland-client-protocol-extra.hpp.

Minimum protocol version required for the get_toplevel function.

Definition at line 1038 of file wayland-client-protocol-extra.hpp.

Minimum protocol version required for the set_window_geometry function.

Definition at line 1101 of file wayland-client-protocol-extra.hpp.