gdkgeometry-win32.c

linux下电话本所依赖的一些图形库

  int parent_x_offset;
  int parent_y_offset;

  g_return_if_fail (GDK_IS_WINDOW_IMPL_WIN32 (window));

  wrapper = GDK_WINDOW_OBJECT (GDK_DRAWABLE_IMPL_WIN32 (window)->wrapper);
  
  info->big = FALSE;
  
  if (window->width <= SIZE_LIMIT)
    {
      info->width = window->width;
      info->x = parent_pos->x + wrapper->x - parent_pos->win32_x;
    }
  else
    {
      info->big = TRUE;
      info->width = SIZE_LIMIT;
      if (parent_pos->x + wrapper->x < -(SIZE_LIMIT/2))
	{
	  if (parent_pos->x + wrapper->x + window->width < (SIZE_LIMIT/2))
	    info->x = parent_pos->x + wrapper->x + window->width - info->width - parent_pos->win32_x;
	  else
	    info->x = -(SIZE_LIMIT/2) - parent_pos->win32_x;
	}
      else
	info->x = parent_pos->x + wrapper->x - parent_pos->win32_x;
    }

  if (window->height <= SIZE_LIMIT)
    {
      info->height = window->height;
      info->y = parent_pos->y + wrapper->y - parent_pos->win32_y;
    }
  else
    {
      info->big = TRUE;
      info->height = SIZE_LIMIT;
      if (parent_pos->y + wrapper->y < -(SIZE_LIMIT/2))
	{
	  if (parent_pos->y + wrapper->y + window->height < (SIZE_LIMIT/2))
	    info->y = parent_pos->y + wrapper->y + window->height - info->height - parent_pos->win32_y;
	  else
	    info->y = -(SIZE_LIMIT/2) - parent_pos->win32_y;
	}
      else
	info->y = parent_pos->y + wrapper->y - parent_pos->win32_y;
    }

  parent_x_offset = parent_pos->win32_x - parent_pos->x;
  parent_y_offset = parent_pos->win32_y - parent_pos->y;
  
  info->x_offset = parent_x_offset + info->x - wrapper->x;
  info->y_offset = parent_y_offset + info->y - wrapper->y;

  /* We don't considering the clipping of toplevel windows and their immediate children
   * by their parents, and simply always map those windows.
   */
  if (parent_pos->clip_rect.width == G_MAXINT)
    info->mapped = TRUE;
  /* Check if the window would wrap around into the visible space in either direction */
  else if (info->x + parent_x_offset < parent_pos->clip_rect.x + parent_pos->clip_rect.width - 65536 ||
      info->x + info->width + parent_x_offset > parent_pos->clip_rect.x + 65536 ||
      info->y + parent_y_offset < parent_pos->clip_rect.y + parent_pos->clip_rect.height - 65536 ||
      info->y + info->height + parent_y_offset  > parent_pos->clip_rect.y + 65536)
    info->mapped = FALSE;
  else
    info->mapped = TRUE;

  info->no_bg = FALSE;

  if (GDK_WINDOW_TYPE (wrapper) == GDK_WINDOW_CHILD)
    {
      info->clip_rect.x = wrapper->x;
      info->clip_rect.y = wrapper->y;
      info->clip_rect.width = window->width;
      info->clip_rect.height = window->height;
      
      gdk_rectangle_intersect (&info->clip_rect, &parent_pos->clip_rect, &info->clip_rect);

      info->clip_rect.x -= wrapper->x;
      info->clip_rect.y -= wrapper->y;
    }
  else
    {
      info->clip_rect.x = 0;
      info->clip_rect.y = 0;
      info->clip_rect.width = G_MAXINT;
      info->clip_rect.height = G_MAXINT;
    }
}

static void
gdk_window_compute_parent_pos (GdkWindowImplWin32 *window,
			       GdkWindowParentPos *parent_pos)
{
  GdkWindowObject *wrapper;
  GdkWindowObject *parent;
  GdkRectangle tmp_clip;
  
  int clip_xoffset = 0;
  int clip_yoffset = 0;

  g_return_if_fail (GDK_IS_WINDOW_IMPL_WIN32 (window));

  wrapper = GDK_WINDOW_OBJECT (GDK_DRAWABLE_IMPL_WIN32 (window)->wrapper);
  
  parent_pos->x = 0;
  parent_pos->y = 0;
  parent_pos->win32_x = 0;
  parent_pos->win32_y = 0;

  /* We take a simple approach here and simply consider toplevel
   * windows not to clip their children on the right/bottom, since the
   * size of toplevel windows is not directly under our
   * control. Clipping only really matters when scrolling and
   * generally we aren't going to be moving the immediate child of a
   * toplevel beyond the bounds of that toplevel.
   *
   * We could go ahead and recompute the clips of toplevel windows and
   * their descendents when we receive size notification, but it would
   * probably not be an improvement in most cases.
   */
  parent_pos->clip_rect.x = 0;
  parent_pos->clip_rect.y = 0;
  parent_pos->clip_rect.width = G_MAXINT;
  parent_pos->clip_rect.height = G_MAXINT;

  parent = (GdkWindowObject *)wrapper->parent;
  while (parent && parent->window_type == GDK_WINDOW_CHILD)
    {
      GdkWindowImplWin32 *impl = GDK_WINDOW_IMPL_WIN32 (parent->impl);
      
      tmp_clip.x = - clip_xoffset;
      tmp_clip.y = - clip_yoffset;
      tmp_clip.width = impl->width;
      tmp_clip.height = impl->height;

      gdk_rectangle_intersect (&parent_pos->clip_rect, &tmp_clip, &parent_pos->clip_rect);

      parent_pos->x += parent->x;
      parent_pos->y += parent->y;
      parent_pos->win32_x += impl->position_info.x;
      parent_pos->win32_y += impl->position_info.y;

      clip_xoffset += parent->x;
      clip_yoffset += parent->y;

      parent = (GdkWindowObject *)parent->parent;
    }
}

static void
gdk_window_postmove (GdkWindow          *window,
		     GdkWindowParentPos *parent_pos,
		     gboolean	         anti_scroll)
{
  GdkWindowImplWin32 *impl;
  GdkWindowObject *obj;
  GdkWin32PositionInfo new_info;
  GList *tmp_list;
  gint d_xoffset, d_yoffset;
  GdkWindowParentPos this_pos;
  GdkRegion *new_clip_region;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_WIN32 (obj->impl);
  
  gdk_window_compute_position (impl, parent_pos, &new_info);

  new_clip_region =
    gdk_window_clip_changed (window, &impl->position_info.clip_rect, &new_info.clip_rect);

  this_pos.x = parent_pos->x + obj->x;
  this_pos.y = parent_pos->y + obj->y;
  this_pos.win32_x = parent_pos->win32_x + new_info.x;
  this_pos.win32_y = parent_pos->win32_y + new_info.y;
  this_pos.clip_rect = new_info.clip_rect;

  if (impl->position_info.mapped && !new_info.mapped)
    ShowWindow (GDK_WINDOW_HWND (window), SW_HIDE);

  d_xoffset = new_info.x_offset - impl->position_info.x_offset;
  d_yoffset = new_info.y_offset - impl->position_info.y_offset;
  
  if (anti_scroll || (anti_scroll = d_xoffset != 0 || d_yoffset != 0))
    {
      GDK_NOTE (MISC, g_print ("gdk_window_postmove: %s@+%d+%d\n"
			       "...SetWindowPos(%dx%d@+%d+%d)\n",
			       _gdk_win32_drawable_description (window),
			       obj->x, obj->y,
			       new_info.width, new_info.height,
			       new_info.x, new_info.y));

      if (!SetWindowPos (GDK_WINDOW_HWND (window), NULL,
                         new_info.x, new_info.y, 
                         0, 0,
                         SWP_NOREDRAW | SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOSIZE))
        WIN32_API_FAILED ("SetWindowPos");
    }

  if (!impl->position_info.mapped && new_info.mapped && GDK_WINDOW_IS_MAPPED (obj))
    ShowWindow (GDK_WINDOW_HWND (window), SW_SHOWNA);

  if (impl->position_info.no_bg)
    gdk_window_tmp_reset_bg (window);

  impl->position_info = new_info;

  if (new_clip_region)
    gdk_window_post_scroll (window, new_clip_region);

  tmp_list = obj->children;
  while (tmp_list)
    {
      gdk_window_postmove (tmp_list->data, &this_pos, anti_scroll);
      tmp_list = tmp_list->next;
    }
}

gboolean
_gdk_windowing_window_queue_antiexpose (GdkWindow *window,
					GdkRegion *area)
{
  HRGN hrgn = _gdk_win32_gdkregion_to_hrgn (area, 0, 0);

  GDK_NOTE (EVENTS, g_print ("_gdk_windowing_window_queue_antiexpose: ValidateRgn %p %s\n",
			     GDK_WINDOW_HWND (window),
			     _gdk_win32_gdkregion_to_string (area)));

  ValidateRgn (GDK_WINDOW_HWND (window), hrgn);

  DeleteObject (hrgn);

  return FALSE;
}

void
_gdk_window_process_expose (GdkWindow *window,
			    GdkRegion *invalidate_region)
{
  GdkWindowImplWin32 *impl;
  GdkRegion *clip_region;
  impl = GDK_WINDOW_IMPL_WIN32 (GDK_WINDOW_OBJECT (window)->impl);
  
  GDK_NOTE (EVENTS, g_print ("_gdk_window_process_expose: %p %s\n",
			     GDK_WINDOW_HWND (window),
			     _gdk_win32_gdkregion_to_string (invalidate_region)));
  clip_region = gdk_region_rectangle (&impl->position_info.clip_rect);
  gdk_region_intersect (invalidate_region, clip_region);

  if (!gdk_region_empty (invalidate_region))
    gdk_window_invalidate_region (window, invalidate_region, FALSE);
  
  gdk_region_destroy (clip_region);
}

static void
gdk_window_tmp_unset_bg (GdkWindow *window)
{
  GdkWindowImplWin32 *impl;
  GdkWindowObject *obj;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_WIN32 (obj->impl);

  impl->position_info.no_bg = TRUE;

  /*
   * The X version sets background = None to avoid updateing for a moment.
   * Not sure if this could really emulate it.
   */
  if (obj->bg_pixmap != GDK_NO_BG)
    /* handled in WM_ERASEBKGRND proceesing */;
}

static void
gdk_window_tmp_reset_bg (GdkWindow *window)
{
  GdkWindowImplWin32 *impl;
  GdkWindowObject *obj;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_WIN32 (obj->impl);

  impl->position_info.no_bg = FALSE;
}

static GdkRegion *
gdk_window_clip_changed (GdkWindow    *window,
			 GdkRectangle *old_clip,
			 GdkRectangle *new_clip)
{
  GdkWindowImplWin32 *impl;
  GdkWindowObject *obj;
  GdkRegion *old_clip_region;
  GdkRegion *new_clip_region;
  
  if (((GdkWindowObject *)window)->input_only)
    return NULL;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_WIN32 (obj->impl);
  
  old_clip_region = gdk_region_rectangle (old_clip);
  new_clip_region = gdk_region_rectangle (new_clip);

  /* Trim invalid region of window to new clip rectangle
   */
  if (obj->update_area)
    gdk_region_intersect (obj->update_area, new_clip_region);

  /* Invalidate newly exposed portion of window
   */
  gdk_region_subtract (new_clip_region, old_clip_region);
  if (!gdk_region_empty (new_clip_region))
    gdk_window_tmp_unset_bg (window);
  else
    {
      gdk_region_destroy (new_clip_region);
      new_clip_region = NULL;
    }
  gdk_region_destroy (old_clip_region);

  return new_clip_region;
}

static void
gdk_window_post_scroll (GdkWindow    *window,
			GdkRegion    *new_clip_region)
{
  GDK_NOTE (EVENTS,
	    g_print ("gdk_window_clip_changed: invalidating region: %s\n",
		     _gdk_win32_gdkregion_to_string (new_clip_region)));

  gdk_window_invalidate_region (window, new_clip_region, FALSE);
  gdk_region_destroy (new_clip_region);
}