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server: Also crop the update region of children when moving a window.

This commit is contained in:
Alexandre Julliard 2008-05-12 12:28:57 +02:00
parent e02969ddf0
commit bc25119c6e
2 changed files with 63 additions and 0 deletions
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13
dlls/user32/tests/msg.c
View File

@ -5811,6 +5811,19 @@ static void test_paint_messages(void)
SetRectRgn( hrgn, 10, 10, 40, 40 );
check_update_rgn( hchild, hrgn );
/* moving parent off-screen does too */
SetRect( &rect, 0, 0, 100, 100 );
RedrawWindow( hparent, &rect, 0, RDW_INVALIDATE | RDW_ERASE | RDW_NOCHILDREN );
SetRectRgn( hrgn, 0, 0, 100, 100 );
check_update_rgn( hparent, hrgn );
SetRectRgn( hrgn, 10, 10, 40, 40 );
check_update_rgn( hchild, hrgn );
MoveWindow( hparent, -20, -20, 200, 200, FALSE );
SetRectRgn( hrgn, 20, 20, 100, 100 );
check_update_rgn( hparent, hrgn );
SetRectRgn( hrgn, 30, 30, 40, 40 );
check_update_rgn( hchild, hrgn );
DestroyWindow( hparent );
ok(!IsWindow(hchild), "child must be destroyed with its parent\n");
flush_sequence();

50
server/window.c
View File

@ -1097,6 +1097,45 @@ static int add_update_region( struct window *win, struct region *region )
}
/* crop the update region of children to the specified rectangle, in client coords */
static void crop_children_update_region( struct window *win, rectangle_t *rect )
{
struct window *child;
struct region *tmp = create_empty_region();
rectangle_t child_rect;
LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
{
if (!(child->style & WS_VISIBLE)) continue;
if (!rect) /* crop everything out */
{
crop_children_update_region( child, NULL );
set_update_region( child, NULL );
continue;
}
/* nothing to do if child is completely inside rect */
if (child->window_rect.left >= rect->left &&
child->window_rect.top >= rect->top &&
child->window_rect.right <= rect->right &&
child->window_rect.bottom <= rect->bottom) continue;
/* map to child client coords and crop grand-children */
child_rect = *rect;
offset_rect( &child_rect, -child->client_rect.left, -child->client_rect.top );
crop_children_update_region( child, &child_rect );
/* now crop the child itself */
if (!child->update_region) continue;
if (!(tmp = create_empty_region())) continue;
set_region_rect( tmp, rect );
offset_region( tmp, -child->window_rect.left, -child->window_rect.top );
if (intersect_region( tmp, child->update_region, tmp )) set_update_region( child, tmp );
else free_region( tmp );
}
}
/* validate the non client area of a window */
static void validate_non_client( struct window *win )
{
@ -1521,6 +1560,17 @@ static void set_window_pos( struct window *win, struct window *previous,
else set_update_region( win, NULL ); /* visible rect is empty */
}
/* crop children regions to the new window rect */
if (get_window_visible_rect( win, &rect, 0 ))
{
/* map to client coords */
offset_rect( &rect, win->window_rect.left - win->client_rect.left,
win->window_rect.top - win->client_rect.top );
crop_children_update_region( win, &rect );
}
else crop_children_update_region( win, NULL );
if (swp_flags & SWP_NOREDRAW) goto done; /* do not repaint anything */
/* expose the whole non-client area if it changed in any way */