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server: When moving/resizing a window crop the update region against the new rectangle of the parents.

This commit is contained in:
Alexandre Julliard 2008-05-12 12:26:26 +02:00
parent f8f8e7ef51
commit e02969ddf0
2 changed files with 87 additions and 12 deletions
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32
dlls/user32/tests/msg.c
View File

@ -5783,6 +5783,38 @@ static void test_paint_messages(void)
DestroyWindow( hparent );
ok(!IsWindow(hchild), "child must be destroyed with its parent\n");
/* tests for moving windows off-screen (needs simple WS_POPUP windows) */
hparent = CreateWindowExA(0, "TestParentClass", "Test parent", WS_POPUP | WS_VISIBLE,
100, 100, 200, 200, 0, 0, 0, NULL);
ok (hparent != 0, "Failed to create parent window\n");
hchild = CreateWindowExA(0, "TestWindowClass", "Test child", WS_CHILD | WS_VISIBLE,
10, 10, 100, 100, hparent, 0, 0, NULL);
ok (hchild != 0, "Failed to create child window\n");
ShowWindow( hparent, SW_SHOW );
UpdateWindow( hparent );
UpdateWindow( hchild );
flush_events();
flush_sequence();
/* moving child outside of parent boundaries changes update region */
SetRect( &rect, 0, 0, 40, 40 );
RedrawWindow( hchild, &rect, 0, RDW_INVALIDATE | RDW_ERASE );
SetRectRgn( hrgn, 0, 0, 40, 40 );
check_update_rgn( hchild, hrgn );
MoveWindow( hchild, -10, 10, 100, 100, FALSE );
SetRectRgn( hrgn, 10, 0, 40, 40 );
check_update_rgn( hchild, hrgn );
MoveWindow( hchild, -10, -10, 100, 100, FALSE );
SetRectRgn( hrgn, 10, 10, 40, 40 );
check_update_rgn( hchild, hrgn );
DestroyWindow( hparent );
ok(!IsWindow(hchild), "child must be destroyed with its parent\n");
flush_sequence();
DeleteObject( hrgn );
DeleteObject( hrgn2 );
}

55
server/window.c
View File

@ -876,6 +876,16 @@ static inline int intersect_rect( rectangle_t *dst, const rectangle_t *src1, con
}
/* offset the coordinates of a rectangle */
static inline void offset_rect( rectangle_t *rect, int offset_x, int offset_y )
{
rect->left += offset_x;
rect->top += offset_y;
rect->right += offset_x;
rect->bottom += offset_y;
}
/* set the region to the client rect clipped by the window rect, in parent-relative coordinates */
static void set_region_client_rect( struct region *region, struct window *win )
{
@ -990,6 +1000,38 @@ struct window_class* get_window_class( user_handle_t window )
return win->class;
}
/* determine the window visible rectangle, i.e. window or client rect cropped by parent rects */
/* the returned rectangle is in window coordinates; return 0 if rectangle is empty */
static int get_window_visible_rect( struct window *win, rectangle_t *rect, int frame )
{
int offset_x = 0, offset_y = 0;
if (!(win->style & WS_VISIBLE)) return 0;
*rect = frame ? win->window_rect : win->client_rect;
if (!is_desktop_window(win))
{
offset_x = win->window_rect.left;
offset_y = win->window_rect.top;
}
while (win->parent)
{
win = win->parent;
if (!(win->style & WS_VISIBLE) || win->style & WS_MINIMIZE) return 0;
if (!is_desktop_window(win))
{
offset_x += win->client_rect.left;
offset_y += win->client_rect.top;
offset_rect( rect, win->client_rect.left, win->client_rect.top );
}
if (!intersect_rect( rect, rect, &win->client_rect )) return 0;
if (!intersect_rect( rect, rect, &win->window_rect )) return 0;
}
offset_rect( rect, -offset_x, -offset_y );
return 1;
}
/* return a copy of the specified region cropped to the window client or frame rectangle, */
/* and converted from client to window coordinates. Helper for (in)validate_window. */
static struct region *crop_region_to_win_rect( struct window *win, struct region *region, int frame )
@ -1413,6 +1455,7 @@ static void set_window_pos( struct window *win, struct window *previous,
struct region *old_vis_rgn = NULL, *exposed_rgn = NULL;
const rectangle_t old_window_rect = win->window_rect;
const rectangle_t old_client_rect = win->client_rect;
rectangle_t rect;
int client_changed, frame_changed;
int visible = (win->style & WS_VISIBLE) || (swp_flags & SWP_SHOWWINDOW);
@ -1461,22 +1504,22 @@ static void set_window_pos( struct window *win, struct window *previous,
/* crop update region to the new window rect */
if (win->update_region &&
(window_rect->right - window_rect->left < old_window_rect.right - old_window_rect.left ||
window_rect->bottom - window_rect->top < old_window_rect.bottom - old_window_rect.top))
if (win->update_region)
{
if (get_window_visible_rect( win, &rect, 1 ))
{
struct region *tmp = create_empty_region();
if (tmp)
{
set_region_rect( tmp, window_rect );
if (!is_desktop_window(win))
offset_region( tmp, -window_rect->left, -window_rect->top );
set_region_rect( tmp, &rect );
if (intersect_region( tmp, win->update_region, tmp ))
set_update_region( win, tmp );
else
free_region( tmp );
}
}
else set_update_region( win, NULL ); /* visible rect is empty */
}
if (swp_flags & SWP_NOREDRAW) goto done; /* do not repaint anything */