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Merge pull request #41596 from nekomatata/x11-fix-drag-n-drop

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Fix drag and drop between windows in X11 display server
This commit is contained in:
Rémi Verschelde 2020-09-03 11:14:37 +02:00 committed by GitHub
commit 28100d554c
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 86 additions and 15 deletions
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99
platform/linuxbsd/display_server_x11.cpp
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@ -742,15 +742,31 @@ ObjectID DisplayServerX11::window_get_attached_instance_id(WindowID p_window) co
}
DisplayServerX11::WindowID DisplayServerX11::get_window_at_screen_position(const Point2i &p_position) const {
#warning This is an incorrect implementation, if windows overlap, it should return the topmost visible one or none if occluded by a foreign window
WindowID found_window = INVALID_WINDOW_ID;
WindowID parent_window = INVALID_WINDOW_ID;
unsigned int focus_order = 0;
for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
Rect2i win_rect = Rect2i(window_get_position(E->key()), window_get_size(E->key()));
const WindowData &wd = E->get();
// Discard windows with no focus.
if (wd.focus_order == 0) {
continue;
}
// Find topmost window which contains the given position.
WindowID window_id = E->key();
Rect2i win_rect = Rect2i(window_get_position(window_id), window_get_size(window_id));
if (win_rect.has_point(p_position)) {
return E->key();
// For siblings, pick the window which was focused last.
if ((parent_window != wd.transient_parent) || (wd.focus_order > focus_order)) {
found_window = window_id;
parent_window = wd.transient_parent;
focus_order = wd.focus_order;
}
}
}
return INVALID_WINDOW_ID;
return found_window;
}
void DisplayServerX11::window_set_title(const String &p_title, WindowID p_window) {
@ -2588,6 +2604,10 @@ void DisplayServerX11::process_events() {
wd.focused = true;
// Keep track of focus order for overlapping windows.
static unsigned int focus_order = 0;
wd.focus_order = ++focus_order;
_send_window_event(wd, WINDOW_EVENT_FOCUS_IN);
if (mouse_mode_grab) {
@ -2707,11 +2727,11 @@ void DisplayServerX11::process_events() {
mb->set_pressed((event.type == ButtonPress));
const WindowData &wd = windows[window_id];
if (event.type == ButtonPress) {
DEBUG_LOG_X11("[%u] ButtonPress window=%lu (%u), button_index=%u \n", frame, event.xbutton.window, window_id, mb->get_button_index());
const WindowData &wd = windows[window_id];
// Ensure window focus on click.
// RevertToPointerRoot is used to make sure we don't lose all focus in case
// a subwindow and its parent are both destroyed.
@ -2739,6 +2759,31 @@ void DisplayServerX11::process_events() {
}
} else {
DEBUG_LOG_X11("[%u] ButtonRelease window=%lu (%u), button_index=%u \n", frame, event.xbutton.window, window_id, mb->get_button_index());
if (!wd.focused) {
// Propagate the event to the focused window,
// because it's received only on the topmost window.
// Note: This is needed for drag & drop to work between windows,
// because the engine expects events to keep being processed
// on the same window dragging started.
for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
const WindowData &wd_other = E->get();
WindowID window_id_other = E->key();
if (wd_other.focused) {
if (window_id_other != window_id) {
int x, y;
Window child;
XTranslateCoordinates(x11_display, wd.x11_window, wd_other.x11_window, event.xbutton.x, event.xbutton.y, &x, &y, &child);
mb->set_window_id(window_id_other);
mb->set_position(Vector2(x, y));
mb->set_global_position(mb->get_position());
Input::get_singleton()->accumulate_input_event(mb);
}
break;
}
}
}
}
Input::get_singleton()->accumulate_input_event(mb);
@ -2788,6 +2833,9 @@ void DisplayServerX11::process_events() {
break;
}
const WindowData &wd = windows[window_id];
bool focused = wd.focused;
if (mouse_mode == MOUSE_MODE_CAPTURED) {
if (xi.relative_motion.x == 0 && xi.relative_motion.y == 0) {
break;
@ -2796,7 +2844,7 @@ void DisplayServerX11::process_events() {
Point2i new_center = pos;
pos = last_mouse_pos + xi.relative_motion;
center = new_center;
do_mouse_warp = windows[window_id].focused; // warp the cursor if we're focused in
do_mouse_warp = focused; // warp the cursor if we're focused in
}
if (!last_mouse_pos_valid) {
@ -2838,14 +2886,11 @@ void DisplayServerX11::process_events() {
}
mm->set_tilt(xi.tilt);
// Make the absolute position integral so it doesn't look _too_ weird :)
Point2i posi(pos);
_get_key_modifier_state(event.xmotion.state, mm);
mm->set_button_mask(mouse_get_button_state());
mm->set_position(posi);
mm->set_global_position(posi);
Input::get_singleton()->set_mouse_position(posi);
mm->set_position(pos);
mm->set_global_position(pos);
Input::get_singleton()->set_mouse_position(pos);
mm->set_speed(Input::get_singleton()->get_last_mouse_speed());
mm->set_relative(rel);
@ -2856,8 +2901,32 @@ void DisplayServerX11::process_events() {
// Don't propagate the motion event unless we have focus
// this is so that the relative motion doesn't get messed up
// after we regain focus.
if (windows[window_id].focused || !mouse_mode_grab) {
if (focused) {
Input::get_singleton()->accumulate_input_event(mm);
} else {
// Propagate the event to the focused window,
// because it's received only on the topmost window.
// Note: This is needed for drag & drop to work between windows,
// because the engine expects events to keep being processed
// on the same window dragging started.
for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
const WindowData &wd_other = E->get();
if (wd_other.focused) {
int x, y;
Window child;
XTranslateCoordinates(x11_display, wd.x11_window, wd_other.x11_window, event.xmotion.x, event.xmotion.y, &x, &y, &child);
Point2i pos_focused(x, y);
mm->set_window_id(E->key());
mm->set_position(pos_focused);
mm->set_global_position(pos_focused);
mm->set_speed(Input::get_singleton()->get_last_mouse_speed());
Input::get_singleton()->accumulate_input_event(mm);
break;
}
}
}
} break;

2
platform/linuxbsd/display_server_x11.h
View file

@ -144,6 +144,8 @@ class DisplayServerX11 : public DisplayServer {
Vector2i last_position_before_fs;
bool focused = false;
bool minimized = false;
unsigned int focus_order = 0;
};
Map<WindowID, WindowData> windows;