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Implement Windows multitouch support

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This commit is contained in:
Robin Gareus 2024-10-31 02:02:09 +01:00
parent 952ec57a26
commit c88d370136
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 98 additions and 13 deletions
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111
libs/tk/ydk/win32/gdkevents-win32.c
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@ -168,6 +168,11 @@ static gboolean gdk_event_dispatch (GSource *source,
static GList *client_filters; /* Filters for client messages */
static GList *touch_mapper = NULL;
static int last_touch_x[32];
static int last_touch_y[32];
static HCURSOR p_grab_cursor;
static GSourceFuncs event_funcs = {
@ -231,6 +236,40 @@ track_mouse_event (DWORD dwFlags,
GDK_NOTE (EVENTS, g_print(" (cancel TrackMouseEvent %p)", hwnd));
}
static int
touch_idx_lookup (DWORD id)
{
GList* g = g_list_find (touch_mapper, GUINT_TO_POINTER(id));
if (!g) {
return -1;
}
return g_list_position (touch_mapper, g);
}
static int
touch_idx_map (DWORD id)
{
GList* g = g_list_find (touch_mapper, GUINT_TO_POINTER(G_MAXUINT));
if (!g) {
touch_mapper = g_list_append (touch_mapper, GUINT_TO_POINTER(id));
} else {
g->data = GUINT_TO_POINTER(id);
}
return touch_idx_lookup (id);
}
static int
touch_idx_unmap (DWORD id)
{
GList* g = g_list_find (touch_mapper, GUINT_TO_POINTER(id));
if (!g) {
return -1;
}
int rv = g_list_position (touch_mapper, g);
g->data = GUINT_TO_POINTER(G_MAXULONG);
return rv;
}
gulong
_gdk_win32_get_next_tick (gulong suggested_tick)
{
@ -2021,24 +2060,75 @@ handle_wm_pointer (GdkEventType type, GdkWindow* window, MSG* msg)
POINTER_TOUCH_INFO touch_info;
if (!getPointerTouchInfo (GET_POINTERID_WPARAM (msg->wParam), &touch_info))
{
printf ("getPointerTouchInfo failed to translate event\n");
printf ("getPointerTouchInfo failed to translate event\n");
return FALSE;
}
/* Touch positions are in screen coordinates, convert
* them to Window coordidates
*/
POINT point;
point.x = GET_X_LPARAM (msg->lParam);
point.y = GET_Y_LPARAM (msg->lParam);
int touch_sequence = 0;
switch (type)
{
case GDK_TOUCH_BEGIN:
touch_sequence = touch_idx_map (GET_POINTERID_WPARAM (msg->wParam));
break;
case GDK_TOUCH_END:
touch_sequence = touch_idx_unmap (GET_POINTERID_WPARAM (msg->wParam));
break;
case GDK_TOUCH_UPDATE:
touch_sequence = touch_idx_lookup (GET_POINTERID_WPARAM (msg->wParam));
break;
default:
return FALSE;
}
// printf ("TOUCH %d SEQ %d %x | %d = %d | %d = %d\n", type, touch_sequence, GET_POINTERID_WPARAM (msg->wParam), (int)point.x, last_touch_x[touch_sequence], (int)point.y, last_touch_y[touch_sequence]);
/* Dear Aliens, we're sorry to limit multitouch to 30 fingers */
if (touch_sequence < 0 || touch_sequence > 31)
{
return FALSE;
}
/* Windows periodically sends WM_POINTERUPDATE updates.
* If a finger has not moved, do not create a GDK event.
*/
if (type == GDK_TOUCH_UPDATE
&& (int)point.x == last_touch_x[touch_sequence]
&& (int)point.y == last_touch_y[touch_sequence])
{
return FALSE;
}
last_touch_x[touch_sequence] = (int)point.x;
last_touch_y[touch_sequence] = (int)point.y;
/* first single touch is already handled by Windows as mouse event */
if (touch_sequence == 0) {
return TRUE;
}
ScreenToClient (msg->hwnd, &point);
GdkEvent *event = gdk_event_new (type);
event->touch.window = window;
event->touch.time = _gdk_win32_get_next_tick (msg->time);
event->touch.x = (gint16) GET_X_LPARAM (msg->lParam);
event->touch.y = (gint16) GET_Y_LPARAM (msg->lParam);
event->touch.x = (gint16) point.x;
event->touch.y = (gint16) point.y;
event->touch.x_root = msg->pt.x + _gdk_offset_x;
event->touch.y_root = msg->pt.y + _gdk_offset_y;
event->touch.state = 0;
event->touch.sequence = GET_POINTERID_WPARAM (msg->wParam); // XXX ?
event->touch.flags = 0; // XXX
event->touch.deviceid = 0; // XXX
event->touch.sequence = GET_POINTERID_WPARAM (msg->wParam); // or touch_sequence + 1
event->touch.flags = 0; // touch_sequence == 0 ? 0x20000 : 0;
event->touch.deviceid = 0;
printf ("getPointerTouchInfo at: %.1fx%.1f root: %1.fx%1.f\n", event->touch.x, event->touch.y, event->touch.x_root, event->touch.y_root);
printf ("getPointerTouchInfo type = %d at: %.1fx%.1f root: %1.fx%1.f seq=%d\n", type, event->touch.x, event->touch.y, event->touch.x_root, event->touch.y_root, touch_sequence);
_gdk_win32_append_event (event);
}
@ -2810,17 +2900,12 @@ gdk_event_translate (MSG *msg,
break;
case 0x0246 /* WM_POINTERDOWN */:
printf ("Event WM_POINTERDOWN\n");
if (!handle_wm_pointer (GDK_TOUCH_BEGIN, window, msg)) {
// XXX -> generate_button_event ?
}
handle_wm_pointer (GDK_TOUCH_BEGIN, window, msg);
break;
case 0x0247 /* WM_POINTERUP */:
printf ("Event WM_POINTERUP\n");
handle_wm_pointer (GDK_TOUCH_END, window, msg);
break;
case 0x0245 /* WM_POINTERUPDATE */:
printf ("Event WM_POINTERUPDATE\n");
handle_wm_pointer (GDK_TOUCH_UPDATE, window, msg);
break;