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GDK W32: Fix pointer-under-window code for custom resize

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This code:
>  gdk_window_get_root_origin (window, &x, &y);
>  x -= root_x;
>  y -= root_y;
>  pointer_window = gdk_device_get_window_at_position (device, &x, &y);
was meant to find the child gdk window at coordinates root_x and root_y.

These 4 lines had 2 bugs:
1) x = x - root_x (same for y) is wrong, it should be x = root_x - x
2) gdk_device_get_window_at_position() does not give you the window
   at position x and y. It gives you the window under the device
   (mouse pointer) and the returns the device coordinates in x and y.

https://bugzilla.gnome.org/show_bug.cgi?id=763533
This commit is contained in:
Руслан Ижбулатов 2016-03-12 12:55:24 +00:00
parent ade1ac16a8
commit ab16b19a0a
1 changed files with 40 additions and 6 deletions
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46
gdk/win32/gdkwindow-win32.c
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@ -2946,6 +2946,44 @@ get_cursor_name_from_op (GdkW32WindowDragOp op,
return NULL;
}
static gboolean
point_in_window (GdkWindow *window,
gdouble x,
gdouble y)
{
return x >= 0 && x < window->width &&
y >= 0 && y < window->height &&
(window->shape == NULL ||
cairo_region_contains_point (window->shape, x, y)) &&
(window->input_shape == NULL ||
cairo_region_contains_point (window->input_shape, x, y));
}
static GdkWindow *
child_window_at_coordinates (GdkWindow *window,
gint root_x,
gint root_y)
{
gint x, y;
GList *l;
GList *children;
children = gdk_window_peek_children (window);
gdk_window_get_root_origin (window, &x, &y);
x = root_x - x;
y = root_y - y;
for (l = children; l; l = g_list_next (l))
{
GdkWindow *child = GDK_WINDOW (l->data);
if (point_in_window (child, x, y))
return child;
}
return window;
}
static void
setup_drag_move_resize_context (GdkWindow *window,
GdkW32DragMoveResizeContext *context,
@ -2959,7 +2997,6 @@ setup_drag_move_resize_context (GdkWindow *window,
{
RECT rect;
const gchar *cursor_name;
gint x, y;
GdkWindow *pointer_window;
GdkDisplay *display = gdk_device_get_display (device);
@ -2969,10 +3006,7 @@ setup_drag_move_resize_context (GdkWindow *window,
context->cursor = _gdk_win32_display_get_cursor_for_name (display, cursor_name);
gdk_window_get_root_origin (window, &x, &y);
x -= root_x;
y -= root_y;
pointer_window = gdk_device_get_window_at_position (device, &x, &y);
pointer_window = child_window_at_coordinates (window, root_x, root_y);
/* Note: This triggers a WM_CAPTURECHANGED, which will trigger
* gdk_win32_window_end_move_resize_drag(), which will end
@ -2998,7 +3032,7 @@ setup_drag_move_resize_context (GdkWindow *window,
g_print ("begin drag moveresize: window %p, toplevel %p, "
"op %u, edge %d, device %p, "
"button %d, coord %d:%d, time %u\n",
window, gdk_window_get_toplevel (window),
pointer_window, gdk_window_get_toplevel (window),
context->op, context->edge, context->device,
context->button, context->start_root_x,
context->start_root_y, context->timestamp));