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Add support for using XDG toplevel drag protocol

Browse Source 
Check for the necessary compile- and run-time support and implement the
new wxTLWDragSession class, allowing to start a TLW drag and notifying a
wxTLWDragHandler about its progress and result, if both are available.

This is not used just yet but will be in the upcoming commits.
This commit is contained in:
Vadim Zeitlin
2026-09-05 15:28:38 +02:00
parent 63ebedec71
commit 602423a2ec
8 changed files with 948 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files
build/cmake/init.cmake
+7 -4
View File
@@ -502,9 +502,10 @@ if(wxUSE_GUI)
wx_generate_wayland_protocol(${wx_protocols_input_dir} pointer-warp-v1)
# Check if we have GTK new enough to allow using XDG
# session management protocol: 3.24.53 is the earliest one
# with gdk_wayland_window_get_xdg_toplevel() that we need.
# Check if we have GTK new enough to allow using the
# XDG protocols requiring access to xdg_toplevel: we
# need gdk_wayland_window_get_xdg_toplevel() which was
# added in 3.24.53.
if(GTK3_VERSION VERSION_GREATER_EQUAL 3.24.53)
# We also need wayland-protocols as this protocol
# depends on xdg-shell one.
@@ -514,10 +515,12 @@ if(wxUSE_GUI)
wx_generate_wayland_protocol(${wx_protocols_input_dir} xdg-session-management-v1)
wx_generate_wayland_protocol(${WAYLAND_PROTOCOLS_DIR}/stable/xdg-shell xdg-shell)
wx_generate_wayland_protocol(${WAYLAND_PROTOCOLS_DIR}/staging/xdg-toplevel-drag xdg-toplevel-drag-v1)
set(wxHAVE_WAYLAND_SESSION_MANAGEMENT ON)
set(wxHAVE_WAYLAND_TOPLEVEL_DRAG ON)
else()
message(WARNING "wayland-protocols not found, xdg-session-management protocol won't be used")
message(WARNING "wayland-protocols package not found, Wayland-specific functionality will be disabled")
endif()
endif()
build/cmake/setup.h.in
+7
View File
@@ -637,6 +637,13 @@
*/
#cmakedefine wxHAVE_WAYLAND_SESSION_MANAGEMENT 1
/*
Use Wayland xdg-toplevel-drag protocol.
This is defined if GTK is new enough to support it.
*/
#cmakedefine wxHAVE_WAYLAND_TOPLEVEL_DRAG 1
/*
Use XTest extension to implement wxUIActionSimulator?
configure
Vendored
+25 -21
View File
@@ -28498,9 +28498,9 @@ $as_echo "$wx_cv_wayland_scanner" >&6; }
fi
if test -n "$WAYLAND_SCANNER" ; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for support of the Wayland session management protocol" >&5
$as_echo_n "checking for support of the Wayland session management protocol... " >&6; }
if ${wx_cv_gtk_wayland_sm+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for support of getting xdg_toplevel from GDK" >&5
$as_echo_n "checking for support of getting xdg_toplevel from GDK... " >&6; }
if ${wx_cv_gtk_xdg_toplevel+:} false; then :
$as_echo_n "(cached) " >&6
else
@@ -28510,17 +28510,17 @@ as_arg_v2=3.24.52
awk "$as_awk_strverscmp" v1="$as_arg_v1" v2="$as_arg_v2" /dev/null
case $? in #(
1) :
wx_cv_gtk_wayland_sm=no ;; #(
wx_cv_gtk_xdg_toplevel=no ;; #(
0) :
wx_cv_gtk_wayland_sm=maybe ;; #(
wx_cv_gtk_xdg_toplevel=maybe ;; #(
2) :
wx_cv_gtk_wayland_sm=yes
wx_cv_gtk_xdg_toplevel=yes
;; #(
*) :
;;
esac
if test "$wx_cv_gtk_wayland_sm" = "maybe"; then
if test "$wx_cv_gtk_xdg_toplevel" = "maybe"; then
save_CFLAGS=$CFLAGS
save_LIBS=$LIBS
CFLAGS="$CFLAGS $TOOLKIT_INCLUDE"
@@ -28539,9 +28539,9 @@ main ()
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
wx_cv_gtk_wayland_sm=yes
wx_cv_gtk_xdg_toplevel=yes
else
wx_cv_gtk_wayland_sm=no
wx_cv_gtk_xdg_toplevel=no
fi
rm -f core conftest.err conftest.$ac_objext \
@@ -28552,10 +28552,10 @@ rm -f core conftest.err conftest.$ac_objext \
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $wx_cv_gtk_wayland_sm" >&5
$as_echo "$wx_cv_gtk_wayland_sm" >&6; }
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $wx_cv_gtk_xdg_toplevel" >&5
$as_echo "$wx_cv_gtk_xdg_toplevel" >&6; }
if test "$wx_cv_gtk_wayland_sm" = "yes"; then
if test "$wx_cv_gtk_xdg_toplevel" = "yes"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for wayland-protocols data directory" >&5
$as_echo_n "checking for wayland-protocols data directory... " >&6; }
if ${wx_cv_wayland_protocols_dir+:} false; then :
@@ -28574,13 +28574,15 @@ $as_echo "$wx_cv_wayland_protocols_dir" >&6; }
-f "$WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml"; then
$as_echo "#define wxHAVE_WAYLAND_SESSION_MANAGEMENT 1" >>confdefs.h
$as_echo "#define wxHAVE_WAYLAND_TOPLEVEL_DRAG 1" >>confdefs.h
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: wayland-protocols package not found, Wayland session management support will be disabled" >&5
$as_echo "$as_me: WARNING: wayland-protocols package not found, Wayland session management support will be disabled" >&2;}
WAYLAND_SM_SUPPORT=':'
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: wayland-protocols package not found, Wayland-specific functionality will be disabled" >&5
$as_echo "$as_me: WARNING: wayland-protocols package not found, Wayland-specific functionality will be disabled" >&2;}
WAYLAND_XDG_SUPPORT=':'
fi
else
WAYLAND_SM_SUPPORT=':'
WAYLAND_XDG_SUPPORT=':'
fi
$as_echo "#define wxHAVE_WAYLAND_CLIENT 1" >>confdefs.h
@@ -46265,7 +46267,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
#
WAYLAND_SCANNER=$WAYLAND_SCANNER
WAYLAND_SM_SUPPORT=$WAYLAND_SM_SUPPORT
WAYLAND_XDG_SUPPORT=$WAYLAND_XDG_SUPPORT
WAYLAND_PROTOCOLS_DIR=$WAYLAND_PROTOCOLS_DIR
@@ -46858,10 +46860,12 @@ $as_echo "$as_me: executing $ac_file commands" >&6;}
mkdir -p lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols
$WAYLAND_SCANNER client-header $srcdir/src/unix/protocols/pointer-warp-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/pointer-warp-v1-client-protocol.h
$WAYLAND_SCANNER private-code $srcdir/src/unix/protocols/pointer-warp-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/pointer-warp-v1-client-protocol.c
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER client-header $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.h
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER private-code $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.c
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER client-header $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.h
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER private-code $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.c
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER client-header $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.h
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER private-code $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.c
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER client-header $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.h
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER private-code $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.c
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER client-header $WAYLAND_PROTOCOLS_DIR/staging/xdg-toplevel-drag/xdg-toplevel-drag-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-toplevel-drag-v1-client-protocol.h
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER private-code $WAYLAND_PROTOCOLS_DIR/staging/xdg-toplevel-drag/xdg-toplevel-drag-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-toplevel-drag-v1-client-protocol.c
;;
"rcdefs.h":C)
mkdir -p $outdir &&
configure.ac
+27 -22
View File
@@ -3128,21 +3128,23 @@ installed, where VER is 2, 3 or 4.
fi
if test -n "$WAYLAND_SCANNER" ; then
dnl Check if we can use the session management protocol which
dnl normally requires GTK >= 3.24.53 but allow using it with
dnl the versions of 3.24.52 that already have the support
dnl required for it, at least until 3.24.53 is released.
AC_CACHE_CHECK([for support of the Wayland session management protocol],
wx_cv_gtk_wayland_sm,
dnl Check if we can get xdg_toplevel from GDK, as this is
dnl required by both the session management and the toplevel
dnl drag protocols used below: this normally requires GTK
dnl >= 3.24.53 but allow using it with the versions of 3.24.52
dnl that already have the support required for it, at least
dnl until 3.24.53 is released.
AC_CACHE_CHECK([for support of getting xdg_toplevel from GDK],
wx_cv_gtk_xdg_toplevel,
[
GTK_VERSION=`$PKG_CONFIG --modversion gtk+-3.0`
AS_VERSION_COMPARE([$GTK_VERSION], [3.24.52],
wx_cv_gtk_wayland_sm=no,
wx_cv_gtk_wayland_sm=maybe,
wx_cv_gtk_wayland_sm=yes
wx_cv_gtk_xdg_toplevel=no,
wx_cv_gtk_xdg_toplevel=maybe,
wx_cv_gtk_xdg_toplevel=yes
)
if test "$wx_cv_gtk_wayland_sm" = "maybe"; then
if test "$wx_cv_gtk_xdg_toplevel" = "maybe"; then
save_CFLAGS=$CFLAGS
save_LIBS=$LIBS
CFLAGS="$CFLAGS $TOOLKIT_INCLUDE"
@@ -3151,8 +3153,8 @@ installed, where VER is 2, 3 or 4.
[
gdk_wayland_window_get_xdg_toplevel(0)
])],
wx_cv_gtk_wayland_sm=yes,
wx_cv_gtk_wayland_sm=no
wx_cv_gtk_xdg_toplevel=yes,
wx_cv_gtk_xdg_toplevel=no
)
LIBS=$save_LIBS
CFLAGS=$save_CFLAGS
@@ -3160,7 +3162,7 @@ installed, where VER is 2, 3 or 4.
]
)
if test "$wx_cv_gtk_wayland_sm" = "yes"; then
if test "$wx_cv_gtk_xdg_toplevel" = "yes"; then
dnl wayland-protocols is normally a dependency of
dnl libgtk-3-dev or similar, but it's not always pulled in
dnl automatically, so still check that it's really there.
@@ -3175,13 +3177,14 @@ installed, where VER is 2, 3 or 4.
if test -n "$WAYLAND_PROTOCOLS_DIR" -a \
-f "$WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml"; then
AC_DEFINE(wxHAVE_WAYLAND_SESSION_MANAGEMENT)
AC_DEFINE(wxHAVE_WAYLAND_TOPLEVEL_DRAG)
else
AC_MSG_WARN([wayland-protocols package not found, Wayland session management support will be disabled])
WAYLAND_SM_SUPPORT=':'
AC_MSG_WARN([wayland-protocols package not found, Wayland-specific functionality will be disabled])
WAYLAND_XDG_SUPPORT=':'
fi
else
dnl Don't bother running wayland-scanner for this protocol.
WAYLAND_SM_SUPPORT=':'
dnl Don't bother running wayland-scanner for these protocols.
WAYLAND_XDG_SUPPORT=':'
fi
AC_DEFINE(wxHAVE_WAYLAND_CLIENT)
@@ -3190,14 +3193,16 @@ installed, where VER is 2, 3 or 4.
mkdir -p lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols
$WAYLAND_SCANNER client-header $srcdir/src/unix/protocols/pointer-warp-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/pointer-warp-v1-client-protocol.h
$WAYLAND_SCANNER private-code $srcdir/src/unix/protocols/pointer-warp-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/pointer-warp-v1-client-protocol.c
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER client-header $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.h
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER private-code $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.c
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER client-header $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.h
$WAYLAND_SM_SUPPORT $WAYLAND_SCANNER private-code $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.c
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER client-header $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.h
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER private-code $srcdir/src/unix/protocols/xdg-session-management-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-session-management-v1-client-protocol.c
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER client-header $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.h
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER private-code $WAYLAND_PROTOCOLS_DIR/stable/xdg-shell/xdg-shell.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-shell-client-protocol.c
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER client-header $WAYLAND_PROTOCOLS_DIR/staging/xdg-toplevel-drag/xdg-toplevel-drag-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-toplevel-drag-v1-client-protocol.h
$WAYLAND_XDG_SUPPORT $WAYLAND_SCANNER private-code $WAYLAND_PROTOCOLS_DIR/staging/xdg-toplevel-drag/xdg-toplevel-drag-v1.xml lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/protocols/xdg-toplevel-drag-v1-client-protocol.c
],
[
WAYLAND_SCANNER=$WAYLAND_SCANNER
WAYLAND_SM_SUPPORT=$WAYLAND_SM_SUPPORT
WAYLAND_XDG_SUPPORT=$WAYLAND_XDG_SUPPORT
WAYLAND_PROTOCOLS_DIR=$WAYLAND_PROTOCOLS_DIR
]
)
include/wx/gtk/private/wayland.h
+61 -2
View File
@@ -31,12 +31,29 @@
#include "wx/protocols/pointer-warp-v1-client-protocol.h"
#ifdef wxHAVE_WAYLAND_SESSION_MANAGEMENT
wxGCC_WARNING_SUPPRESS(cast-qual)
#ifdef wxHAVE_WAYLAND_SESSION_MANAGEMENT
#include "wx/protocols/xdg-session-management-v1-client-protocol.h"
wxGCC_WARNING_RESTORE()
#endif // wxHAVE_WAYLAND_SESSION_MANAGEMENT
// This one is different from wxHAVE_WAYLAND_XXX because it's always supported
// and hence there is no need to detect it in the build system.
//
// But we only need it when using the toplevel drag protocol, so we define it
// ourselves, as either 0 or 1.
#ifdef wxHAVE_WAYLAND_TOPLEVEL_DRAG
#include "wx/protocols/xdg-toplevel-drag-v1-client-protocol.h"
#define wxUSE_WAYLAND_DATA_DEVICE_MANAGER 1
#endif // wxHAVE_WAYLAND_TOPLEVEL_DRAG
wxGCC_WARNING_RESTORE()
#ifndef wxUSE_WAYLAND_DATA_DEVICE_MANAGER
#define wxUSE_WAYLAND_DATA_DEVICE_MANAGER 0
#endif
namespace wxWayland
{
@@ -53,6 +70,12 @@ struct wl_deleter;
} \
}
#if wxUSE_WAYLAND_DATA_DEVICE_MANAGER
wxDEFINE_WL_DELETER(wl_data_device, wl_data_device_release);
wxDEFINE_WL_DELETER(wl_data_device_manager, wl_data_device_manager_destroy);
wxDEFINE_WL_DELETER(wl_data_offer, wl_data_offer_destroy);
#endif // wxUSE_WAYLAND_DATA_DEVICE_MANAGER
wxDEFINE_WL_DELETER(wl_data_source, wl_data_source_destroy);
wxDEFINE_WL_DELETER(wl_pointer, wl_pointer_release);
wxDEFINE_WL_DELETER(wl_registry, wl_registry_destroy);
wxDEFINE_WL_DELETER(wl_seat, wl_seat_release);
@@ -62,6 +85,10 @@ wxDEFINE_WL_DELETER(xdg_session_manager_v1, xdg_session_manager_v1_destroy);
wxDEFINE_WL_DELETER(xdg_session_v1, xdg_session_v1_destroy);
wxDEFINE_WL_DELETER(xdg_toplevel_session_v1, xdg_toplevel_session_v1_destroy);
#endif // wxHAVE_WAYLAND_SESSION_MANAGEMENT
#ifdef wxHAVE_WAYLAND_TOPLEVEL_DRAG
wxDEFINE_WL_DELETER(xdg_toplevel_drag_manager_v1, xdg_toplevel_drag_manager_v1_destroy);
wxDEFINE_WL_DELETER(xdg_toplevel_drag_v1, xdg_toplevel_drag_v1_destroy);
#endif // wxHAVE_WAYLAND_TOPLEVEL_DRAG
template <typename T>
using wl_unique_ptr = std::unique_ptr<T, wl_deleter<T>>;
@@ -85,6 +112,10 @@ public:
void UpdateCapabilities(int capabilities);
// Return the data device for this seat, creating it on demand, or null if
// the data device manager global is not available.
wl_data_device* GetDataDevice();
// Most members are const after they're first set, but can't be really
// const because we need to be able to move Seat objects.
@@ -102,6 +133,22 @@ public:
// which surface it happened for, we just need a valid serial to pass to
// wp_pointer_warp_v1_warp_pointer().
uint32_t lastEnterSerial = 0;
#ifdef wxHAVE_WAYLAND_TOPLEVEL_DRAG
// Last serial of a "pointer button pressed" event for this seat: this is
// the serial of the implicit grab which must be passed to
// wl_data_device_start_drag().
uint32_t lastButtonSerial = 0;
// The data device for this seat: only created if it's actually needed,
// i.e. if we start a drag using it, see GetDataDevice().
wl_unique_ptr<wl_data_device> data_device;
// The last data offer we were given: we don't use it at all, but it must
// be destroyed to avoid memory leaks, so we need to store it as it's not
// clear if we can destroy it immediately when it's offered.
wl_unique_ptr<wl_data_offer> last_data_offer;
#endif // wxHAVE_WAYLAND_TOPLEVEL_DRAG
};
@@ -127,6 +174,18 @@ struct Globals
// Optional pointer to the global pointer warp protocol object.
wl_unique_ptr<wp_pointer_warp_v1> pointer_warp;
#if wxUSE_WAYLAND_DATA_DEVICE_MANAGER
// Optional pointer to the global data device manager object: this one is
// always supported, but we only bind it if we need it, i.e. if we can also
// use the toplevel drag protocol below.
wl_unique_ptr<wl_data_device_manager> data_device_manager;
#endif // wxUSE_WAYLAND_DATA_DEVICE_MANAGER
#ifdef wxHAVE_WAYLAND_TOPLEVEL_DRAG
// Optional pointer to the global toplevel drag protocol object.
wl_unique_ptr<xdg_toplevel_drag_manager_v1> toplevel_drag_manager;
#endif // wxHAVE_WAYLAND_TOPLEVEL_DRAG
#ifdef wxHAVE_WAYLAND_SESSION_MANAGEMENT
// Optional pointer to the global session manager protocol object.
wl_unique_ptr<xdg_session_manager_v1> session_manager;
include/wx/private/tlwdrag.h
+108
View File
@@ -0,0 +1,108 @@
///////////////////////////////////////////////////////////////////////////////
// Name: wx/private/tlwdrag.h
// Purpose: wxTLWDragSession: drag a TLW using the system drag machinery
// Author: Vadim Zeitlin
// Created: 2026-08-25
// Copyright: (c) 2026 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_PRIVATE_TLWDRAG_H_
#define _WX_PRIVATE_TLWDRAG_H_
#include "wx/defs.h"
#include "wx/gdicmn.h"
#include <memory>
class WXDLLIMPEXP_FWD_CORE wxWindow;
// Only wxGTK provides an implementation of this class for now and even there
// it may not be available, see wxTLWDragSession::Create().
#ifdef __WXGTK3__
#define wxHAS_TLW_DRAG_SESSION
#endif
#ifdef wxHAS_TLW_DRAG_SESSION
// ----------------------------------------------------------------------------
// wxTLWDragHandler: receives the notifications during wxTLWDragSession
// ----------------------------------------------------------------------------
class wxTLWDragHandler
{
public:
virtual ~wxTLWDragHandler() = default;
// Called whenever the pointer moves during the drag.
//
// "win" is the window the drag originated from if the pointer is currently
// over it or null if it is not, and "pt" is the pointer position in screen
// coordinates. Note that we can only detect being over the origin window
// itself, drags over the other windows of this application, or of the
// other applications, are indistinguishable from being outside of them.
//
// Note that under Wayland the screen coordinates are not really global,
// but they are still consistent with the coordinates used by the windows
// inside "win", which is all we need here.
virtual void OnDragOver(wxWindow* win, const wxPoint& pt) = 0;
// Called when the drag ends with a drop.
//
// If this function is not called, the drag was cancelled and OnCancel()
// is called instead.
//
// The arguments are the same as for OnDragOver().
//
// The handler, and the session owning it, may be destroyed from here.
virtual void OnDragDrop(wxWindow* win, const wxPoint& pt) = 0;
// Called when the drag was cancelled.
virtual void OnDragCancel() = 0;
};
// ----------------------------------------------------------------------------
// wxTLWDragSession: represents a drag moving a TLW with the pointer
// ----------------------------------------------------------------------------
// This class encapsulates a drag operation during which a TLW follows the
// mouse pointer until the drag ends.
//
// Currently it's only implemented in wxGTK3 when using Wayland and the
// appropriate build-time support is available, but we still use a base class
// for it to avoid exposing the implementation details in this header and to
// allow for future implementations for other ports.
class WXDLLIMPEXP_CORE wxTLWDragSession
{
public:
// Creating a drag session starts a drag originating from the given window,
// which must be shown and must be the window currently having the pointer
// grab, i.e. this can only be called while handling a mouse event for it.
//
// Returns null if starting the drag is not supported, in which case the
// caller has to fall back to moving the window on its own.
static std::unique_ptr<wxTLWDragSession>
Create(wxWindow* origin, std::unique_ptr<wxTLWDragHandler> handler);
// Ask the system to move the given TLW with the pointer for the rest of
// the drag. The window must be already shown and "offset" is the position
// of the pointer inside it, used as a hint for its initial position.
//
// This can only be called once for any given session.
virtual bool AttachWindow(wxWindow* tlw, const wxPoint& offset) = 0;
// Virtual dtor for any base class used polymorphically.
virtual ~wxTLWDragSession() = default;
};
#else // !wxHAS_TLW_DRAG_SESSION
// Define a stub just to allow to refer to it in the headers without checking
// for wxHAS_TLW_DRAG_SESSION first.
class wxTLWDragSession
{
};
#endif // wxHAS_TLW_DRAG_SESSION/!wxHAS_TLW_DRAG_SESSION
#endif // _WX_PRIVATE_TLWDRAG_H_
setup.h.in
+7
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@@ -636,6 +636,13 @@
*/
#undef wxHAVE_WAYLAND_SESSION_MANAGEMENT
/*
Use Wayland xdg-toplevel-drag protocol.
This is defined if GTK is new enough to support it.
*/
#undef wxHAVE_WAYLAND_TOPLEVEL_DRAG
/*
Use XTest extension to implement wxUIActionSimulator?
src/gtk/wayland.cpp
+706 -9
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