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x11: Implement gdk_drag_context_manage_dnd()
This includes managing input events and source-side DND events, as well as setting the appropriate cursor and emitting the signals that are expected in this mode of operation.
This commit is contained in:
Carlos Garnacho
parent
ed5da43afb
commit
bfee45e6f9
@ -89,6 +89,12 @@ struct _GdkX11DragContext
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GdkWindow *drag_window;
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GdkWindow *ipc_window;
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GdkCursor *cursor;
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GdkSeat *grab_seat;
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GdkDragAction actions;
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GdkDragAction current_action;
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gint hot_x;
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gint hot_y;
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@ -106,6 +112,35 @@ struct _GdkX11DragContextClass
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GdkDragContextClass parent_class;
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};
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typedef struct {
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gint keysym;
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gint modifiers;
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} GrabKey;
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static GrabKey grab_keys[] = {
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{ XK_Escape, 0 },
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{ XK_space, 0 },
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{ XK_KP_Space, 0 },
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{ XK_Return, 0 },
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{ XK_KP_Enter, 0 },
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{ XK_Up, 0 },
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{ XK_Up, Mod1Mask },
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{ XK_Down, 0 },
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{ XK_Down, Mod1Mask },
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{ XK_Left, 0 },
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{ XK_Left, Mod1Mask },
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{ XK_Right, 0 },
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{ XK_Right, Mod1Mask },
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{ XK_KP_Up, 0 },
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{ XK_KP_Up, Mod1Mask },
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{ XK_KP_Down, 0 },
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{ XK_KP_Down, Mod1Mask },
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{ XK_KP_Left, 0 },
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{ XK_KP_Left, Mod1Mask },
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{ XK_KP_Right, 0 },
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{ XK_KP_Right, Mod1Mask }
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};
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/* Forward declarations */
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static GdkWindowCache *gdk_window_cache_get (GdkScreen *screen);
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@ -135,6 +170,11 @@ static void xdnd_manage_source_filter (GdkDragContext *context,
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GdkWindow *window,
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gboolean add_filter);
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gboolean gdk_x11_drag_context_handle_event (GdkDragContext *context,
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const GdkEvent *event);
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void gdk_x11_drag_context_action_changed (GdkDragContext *context,
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GdkDragAction action);
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static GList *contexts;
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static GSList *window_caches;
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@ -195,6 +235,14 @@ static void gdk_x11_drag_context_set_hotspot (GdkDragContext *context,
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gint hot_y);
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static void gdk_x11_drag_context_drop_done (GdkDragContext *context,
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gboolean success);
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static gboolean gdk_x11_drag_context_manage_dnd (GdkDragContext *context,
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GdkWindow *window,
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GdkDragAction actions);
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static void gdk_x11_drag_context_set_cursor (GdkDragContext *context,
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GdkCursor *cursor);
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static void gdk_x11_drag_context_cancel (GdkDragContext *context);
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static void gdk_x11_drag_context_drop_performed (GdkDragContext *context,
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guint32 time);
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static void
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gdk_x11_drag_context_class_init (GdkX11DragContextClass *klass)
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@ -216,6 +264,12 @@ gdk_x11_drag_context_class_init (GdkX11DragContextClass *klass)
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context_class->get_drag_window = gdk_x11_drag_context_get_drag_window;
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context_class->set_hotspot = gdk_x11_drag_context_set_hotspot;
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context_class->drop_done = gdk_x11_drag_context_drop_done;
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context_class->manage_dnd = gdk_x11_drag_context_manage_dnd;
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context_class->set_cursor = gdk_x11_drag_context_set_cursor;
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context_class->cancel = gdk_x11_drag_context_cancel;
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context_class->drop_performed = gdk_x11_drag_context_drop_performed;
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context_class->handle_event = gdk_x11_drag_context_handle_event;
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context_class->action_changed = gdk_x11_drag_context_action_changed;
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}
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static void
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@ -2592,3 +2646,487 @@ gdk_x11_drag_context_drop_done (GdkDragContext *context,
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gdk_drag_anim_timeout, anim,
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(GDestroyNotify) gdk_drag_anim_destroy);
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}
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static gboolean
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drag_context_grab (GdkDragContext *context)
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{
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GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
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GdkDevice *device = gdk_drag_context_get_device (context);
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GdkWindow *root;
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GdkSeat *seat;
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gint keycode, i;
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if (!x11_context->ipc_window)
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return FALSE;
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root = gdk_screen_get_root_window (gdk_window_get_screen (x11_context->ipc_window));
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seat = gdk_device_get_seat (gdk_drag_context_get_device (context));
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if (gdk_seat_grab (seat, x11_context->ipc_window,
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GDK_SEAT_CAPABILITY_ALL, FALSE,
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x11_context->cursor, NULL, NULL, NULL) != GDK_GRAB_SUCCESS)
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return FALSE;
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g_set_object (&x11_context->grab_seat, seat);
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gdk_error_trap_push ();
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for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
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{
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keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
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grab_keys[i].keysym);
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if (keycode == NoSymbol)
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continue;
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#ifdef XINPUT_2
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if (GDK_IS_X11_DEVICE_XI2 (device))
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{
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gint deviceid = gdk_x11_device_get_id (gdk_seat_get_keyboard (seat));
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unsigned char mask[XIMaskLen(XI_LASTEVENT)];
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XIGrabModifiers mods;
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XIEventMask evmask;
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gint num_mods;
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memset (mask, 0, sizeof (mask));
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XISetMask (mask, XI_KeyPress);
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XISetMask (mask, XI_KeyRelease);
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evmask.deviceid = deviceid;
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evmask.mask_len = sizeof (mask);
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evmask.mask = mask;
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num_mods = 1;
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mods.modifiers = grab_keys[i].modifiers;
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XIGrabKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
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deviceid,
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keycode,
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GDK_WINDOW_XID (root),
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GrabModeAsync,
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GrabModeAsync,
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False,
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&evmask,
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num_mods,
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&mods);
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}
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else
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#endif
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{
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XGrabKey (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
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keycode, grab_keys[i].modifiers,
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GDK_WINDOW_XID (root),
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FALSE,
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GrabModeAsync,
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GrabModeAsync);
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}
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}
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return TRUE;
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}
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static void
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drag_context_ungrab (GdkDragContext *context)
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{
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GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
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GdkDevice *keyboard;
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GdkWindow *root;
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gint keycode, i;
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if (!x11_context->grab_seat)
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return;
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gdk_seat_ungrab (x11_context->grab_seat);
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keyboard = gdk_seat_get_keyboard (x11_context->grab_seat);
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root = gdk_screen_get_root_window (gdk_window_get_screen (x11_context->ipc_window));
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g_clear_object (&x11_context->grab_seat);
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for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
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{
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keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
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grab_keys[i].keysym);
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if (keycode == NoSymbol)
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continue;
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#ifdef XINPUT_2
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if (GDK_IS_X11_DEVICE_XI2 (keyboard))
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{
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XIGrabModifiers mods;
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gint num_mods;
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num_mods = 1;
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mods.modifiers = grab_keys[i].modifiers;
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XIUngrabKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
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gdk_x11_device_get_id (keyboard),
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keycode,
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GDK_WINDOW_XID (root),
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num_mods,
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&mods);
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}
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else
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#endif /* XINPUT_2 */
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{
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XUngrabKey (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
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keycode, grab_keys[i].modifiers,
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GDK_WINDOW_XID (root));
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}
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}
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}
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static gboolean
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gdk_x11_drag_context_manage_dnd (GdkDragContext *context,
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GdkWindow *ipc_window,
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GdkDragAction actions)
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{
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GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
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if (x11_context->ipc_window)
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return FALSE;
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context->protocol = GDK_DRAG_PROTO_XDND;
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x11_context->ipc_window = g_object_ref (ipc_window);
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if (drag_context_grab (context))
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{
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x11_context->actions = actions;
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return TRUE;
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}
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else
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{
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g_clear_object (&x11_context->ipc_window);
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return FALSE;
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}
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}
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static void
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gdk_x11_drag_context_set_cursor (GdkDragContext *context,
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GdkCursor *cursor)
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{
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GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
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if (!g_set_object (&x11_context->cursor, cursor))
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return;
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if (x11_context->grab_seat)
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{
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
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gdk_device_grab (gdk_seat_get_pointer (x11_context->grab_seat),
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x11_context->ipc_window,
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GDK_OWNERSHIP_APPLICATION, FALSE,
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GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
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cursor, GDK_CURRENT_TIME);
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G_GNUC_END_IGNORE_DEPRECATIONS;
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}
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}
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static void
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gdk_x11_drag_context_cancel (GdkDragContext *context)
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{
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drag_context_ungrab (context);
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gdk_drag_drop_done (context, FALSE);
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}
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static void
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gdk_x11_drag_context_drop_performed (GdkDragContext *context,
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guint32 time_)
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{
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drag_context_ungrab (context);
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}
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#define BIG_STEP 20
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#define SMALL_STEP 1
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static void
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gdk_drag_get_current_actions (GdkModifierType state,
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gint button,
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GdkDragAction actions,
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GdkDragAction *suggested_action,
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GdkDragAction *possible_actions)
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{
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*suggested_action = 0;
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*possible_actions = 0;
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if ((button == GDK_BUTTON_MIDDLE || button == GDK_BUTTON_SECONDARY) && (actions & GDK_ACTION_ASK))
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{
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*suggested_action = GDK_ACTION_ASK;
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*possible_actions = actions;
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}
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else if (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
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{
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if ((state & GDK_SHIFT_MASK) && (state & GDK_CONTROL_MASK))
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{
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if (actions & GDK_ACTION_LINK)
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{
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*suggested_action = GDK_ACTION_LINK;
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*possible_actions = GDK_ACTION_LINK;
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}
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}
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else if (state & GDK_CONTROL_MASK)
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{
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if (actions & GDK_ACTION_COPY)
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{
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*suggested_action = GDK_ACTION_COPY;
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*possible_actions = GDK_ACTION_COPY;
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}
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}
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else
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{
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if (actions & GDK_ACTION_MOVE)
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{
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*suggested_action = GDK_ACTION_MOVE;
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*possible_actions = GDK_ACTION_MOVE;
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}
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}
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}
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else
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{
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*possible_actions = actions;
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if ((state & (GDK_MOD1_MASK)) && (actions & GDK_ACTION_ASK))
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*suggested_action = GDK_ACTION_ASK;
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else if (actions & GDK_ACTION_COPY)
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*suggested_action = GDK_ACTION_COPY;
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else if (actions & GDK_ACTION_MOVE)
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*suggested_action = GDK_ACTION_MOVE;
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else if (actions & GDK_ACTION_LINK)
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*suggested_action = GDK_ACTION_LINK;
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}
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}
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static void
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gdk_drag_update (GdkDragContext *context,
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gdouble x_root,
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gdouble y_root,
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GdkModifierType mods,
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guint32 evtime)
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{
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GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
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GdkDragAction action, possible_actions;
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GdkWindow *dest_window;
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GdkDragProtocol protocol;
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gdk_drag_get_current_actions (mods, GDK_BUTTON_PRIMARY, x11_context->actions,
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&action, &possible_actions);
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gdk_drag_find_window_for_screen (context,
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x11_context->drag_window,
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gdk_display_get_default_screen (gdk_display_get_default ()),
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x_root, y_root, &dest_window, &protocol);
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gdk_drag_motion (context, dest_window, protocol, x_root, y_root,
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action, possible_actions, evtime);
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}
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static gboolean
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gdk_dnd_handle_motion_event (GdkDragContext *context,
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const GdkEventMotion *event)
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{
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GdkModifierType state;
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if (!gdk_event_get_state ((GdkEvent *) event, &state))
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return FALSE;
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gdk_drag_update (context, event->x_root, event->y_root, state,
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gdk_event_get_time ((GdkEvent *) event));
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return TRUE;
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}
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static gboolean
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gdk_dnd_handle_key_event (GdkDragContext *context,
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const GdkEventKey *event)
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{
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GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
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GdkModifierType state;
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GdkWindow *root_window;
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GdkDevice *pointer;
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gint dx, dy;
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dx = dy = 0;
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state = event->state;
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pointer = gdk_device_get_associated_device (gdk_event_get_device ((GdkEvent *) event));
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if (event->type == GDK_KEY_PRESS)
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{
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switch (event->keyval)
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{
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case GDK_KEY_Escape:
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gdk_drag_context_cancel (context);
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return TRUE;
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case GDK_KEY_space:
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case GDK_KEY_Return:
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case GDK_KEY_ISO_Enter:
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case GDK_KEY_KP_Enter:
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case GDK_KEY_KP_Space:
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if ((gdk_drag_context_get_selected_action (context) != 0) &&
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(gdk_drag_context_get_dest_window (context) != NULL))
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{
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g_signal_emit_by_name (context, "drop-performed",
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gdk_event_get_time ((GdkEvent *) event));
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}
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else
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gdk_drag_context_cancel (context);
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return TRUE;
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case GDK_KEY_Up:
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case GDK_KEY_KP_Up:
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dy = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
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break;
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case GDK_KEY_Down:
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case GDK_KEY_KP_Down:
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dy = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
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break;
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case GDK_KEY_Left:
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case GDK_KEY_KP_Left:
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dx = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
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break;
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case GDK_KEY_Right:
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case GDK_KEY_KP_Right:
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dx = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
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break;
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}
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}
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/* The state is not yet updated in the event, so we need
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* to query it here. We could use XGetModifierMapping, but
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* that would be overkill.
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*/
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root_window = gdk_screen_get_root_window (gdk_window_get_screen (x11_context->ipc_window));
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gdk_window_get_device_position (root_window, pointer, NULL, NULL, &state);
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if (dx != 0 || dy != 0)
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{
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x11_context->last_x += dx;
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x11_context->last_y += dy;
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gdk_device_warp (pointer,
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gdk_window_get_screen (x11_context->ipc_window),
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x11_context->last_x, x11_context->last_y);
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}
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gdk_drag_update (context, x11_context->last_x, x11_context->last_y, state,
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gdk_event_get_time ((GdkEvent *) event));
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return TRUE;
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}
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static gboolean
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gdk_dnd_handle_grab_broken_event (GdkDragContext *context,
|
||||
const GdkEventGrabBroken *event)
|
||||
{
|
||||
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
|
||||
|
||||
/* Don't cancel if we break the implicit grab from the initial button_press.
|
||||
* Also, don't cancel if we re-grab on the widget or on our IPC window, for
|
||||
* example, when changing the drag cursor.
|
||||
*/
|
||||
if (event->implicit ||
|
||||
event->grab_window == x11_context->drag_window ||
|
||||
event->grab_window == x11_context->ipc_window)
|
||||
return FALSE;
|
||||
|
||||
gdk_drag_context_cancel (context);
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gdk_dnd_handle_button_event (GdkDragContext *context,
|
||||
const GdkEventButton *event)
|
||||
{
|
||||
#if 0
|
||||
/* FIXME: Check the button matches */
|
||||
if (event->button != x11_context->button)
|
||||
return FALSE;
|
||||
#endif
|
||||
|
||||
if ((gdk_drag_context_get_selected_action (context) != 0) &&
|
||||
(gdk_drag_context_get_dest_window (context) != NULL))
|
||||
{
|
||||
g_signal_emit_by_name (context, "drop-performed",
|
||||
gdk_event_get_time ((GdkEvent *) event));
|
||||
}
|
||||
else
|
||||
gdk_drag_context_cancel (context);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gdk_dnd_handle_drag_status (GdkDragContext *context,
|
||||
const GdkEventDND *event)
|
||||
{
|
||||
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
|
||||
GdkDragAction action;
|
||||
|
||||
if (context != event->context)
|
||||
return FALSE;
|
||||
|
||||
action = gdk_drag_context_get_selected_action (context);
|
||||
|
||||
if (action != context_x11->current_action)
|
||||
{
|
||||
context_x11->current_action = action;
|
||||
g_signal_emit_by_name (context, "action-changed", action);
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gdk_dnd_handle_drop_finished (GdkDragContext *context,
|
||||
const GdkEventDND *event)
|
||||
{
|
||||
if (context != event->context)
|
||||
return FALSE;
|
||||
|
||||
g_signal_emit_by_name (context, "dnd-finished");
|
||||
gdk_drag_drop_done (context, TRUE);
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gdk_x11_drag_context_handle_event (GdkDragContext *context,
|
||||
const GdkEvent *event)
|
||||
{
|
||||
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
|
||||
|
||||
if (!context->is_source)
|
||||
return FALSE;
|
||||
if (!x11_context->grab_seat && event->type != GDK_DROP_FINISHED)
|
||||
return FALSE;
|
||||
|
||||
switch (event->type)
|
||||
{
|
||||
case GDK_MOTION_NOTIFY:
|
||||
return gdk_dnd_handle_motion_event (context, &event->motion);
|
||||
case GDK_BUTTON_RELEASE:
|
||||
return gdk_dnd_handle_button_event (context, &event->button);
|
||||
case GDK_KEY_PRESS:
|
||||
case GDK_KEY_RELEASE:
|
||||
return gdk_dnd_handle_key_event (context, &event->key);
|
||||
case GDK_GRAB_BROKEN:
|
||||
return gdk_dnd_handle_grab_broken_event (context, &event->grab_broken);
|
||||
case GDK_DRAG_STATUS:
|
||||
return gdk_dnd_handle_drag_status (context, &event->dnd);
|
||||
case GDK_DROP_FINISHED:
|
||||
return gdk_dnd_handle_drop_finished (context, &event->dnd);
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
void
|
||||
gdk_x11_drag_context_action_changed (GdkDragContext *context,
|
||||
GdkDragAction action)
|
||||
{
|
||||
GdkCursor *cursor;
|
||||
|
||||
cursor = gdk_drag_get_cursor (action);
|
||||
gdk_drag_context_set_cursor (context, cursor);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user