gdkevents-win32.c

linux下电话本所依赖的一些图形库

			}
		      y += pixmap_impl->height;
		    }
		}
	      x += pixmap_impl->width;
	    }
	  SelectObject (bgdc, oldbitmap);
	  DeleteDC (bgdc);
	}
    }
}

static GdkRegion *
_gdk_win32_hrgn_to_region (HRGN hrgn)
{
  RGNDATA *rgndata;
  RECT *rects;
  GdkRegion *result;
  gint nbytes;
  guint i;

  if ((nbytes = GetRegionData (hrgn, 0, NULL)) == 0)
    {
      WIN32_GDI_FAILED ("GetRegionData");
      return NULL;
    }

  rgndata = (RGNDATA *) g_malloc (nbytes);

  if (GetRegionData (hrgn, nbytes, rgndata) == 0)
    {
      WIN32_GDI_FAILED ("GetRegionData");
      g_free (rgndata);
      return NULL;
    }

  result = gdk_region_new ();
  rects = (RECT *) rgndata->Buffer;
  for (i = 0; i < rgndata->rdh.nCount; i++)
    {
      GdkRectangle r;

      r.x = rects[i].left;
      r.y = rects[i].top;
      r.width = rects[i].right - r.x;
      r.height = rects[i].bottom - r.y;

      gdk_region_union_with_rect (result, &r);
    }

  g_free (rgndata);

  return result;
}

static void
adjust_drag (LONG *drag,
	     LONG  curr,
	     gint  inc)
{
  if (*drag > curr)
    *drag = curr + ((*drag + inc/2 - curr) / inc) * inc;
  else
    *drag = curr - ((curr - *drag + inc/2) / inc) * inc;
}

static void
handle_wm_paint (MSG        *msg,
		 GdkWindow  *window,
		 gboolean    return_exposes,
		 GdkEvent  **event)
{
  HRGN hrgn = CreateRectRgn (0, 0, 0, 0);
  HDC hdc;
  PAINTSTRUCT paintstruct;
  GdkRegion *update_region;
  gint xoffset, yoffset;

  if (GetUpdateRgn (msg->hwnd, hrgn, FALSE) == ERROR)
    {
      WIN32_GDI_FAILED ("GetUpdateRgn");
      return;
    }

  hdc = BeginPaint (msg->hwnd, &paintstruct);

  GDK_NOTE (EVENTS, g_print (" %s %s dc %p%s",
			     _gdk_win32_rect_to_string (&paintstruct.rcPaint),
			     (paintstruct.fErase ? "erase" : ""),
			     hdc,
			     (return_exposes ? " return_exposes" : "")));

  EndPaint (msg->hwnd, &paintstruct);

  /* HB: don't generate GDK_EXPOSE events for InputOnly
   * windows -> backing store now works!
   */
  if (((GdkWindowObject *) window)->input_only)
    {
      DeleteObject (hrgn);
      return;
    }

  if (!(((GdkWindowObject *) window)->event_mask & GDK_EXPOSURE_MASK))
    {
      GDK_NOTE (EVENTS, g_print (" (ignored)"));
      DeleteObject (hrgn);
      return;
    }

#if 0 /* we need to process exposes even with GDK_NO_BG
   * Otherwise The GIMP canvas update is broken ....
   */
  if (((GdkWindowObject *) window)->bg_pixmap == GDK_NO_BG)
    break;
#endif

  if ((paintstruct.rcPaint.right == paintstruct.rcPaint.left) ||
      (paintstruct.rcPaint.bottom == paintstruct.rcPaint.top))
    {
      GDK_NOTE (EVENTS, g_print (" (empty paintstruct, ignored)"));
      DeleteObject (hrgn);
      return;
    }

  if (return_exposes)
    {
      if (!GDK_WINDOW_DESTROYED (window))
	{
	  GList *list = gdk_drawable_get_display (window)->queued_events;

	  *event = gdk_event_new (GDK_EXPOSE);
	  (*event)->expose.window = window;
	  (*event)->expose.area.x = paintstruct.rcPaint.left;
	  (*event)->expose.area.y = paintstruct.rcPaint.top;
	  (*event)->expose.area.width = paintstruct.rcPaint.right - paintstruct.rcPaint.left;
	  (*event)->expose.area.height = paintstruct.rcPaint.bottom - paintstruct.rcPaint.top;
	  (*event)->expose.region = _gdk_win32_hrgn_to_region (hrgn);
	  (*event)->expose.count = 0;

	  while (list != NULL)
	    {
	      GdkEventPrivate *evp = list->data;

	      if (evp->event.any.type == GDK_EXPOSE &&
		  evp->event.any.window == window &&
		  !(evp->flags & GDK_EVENT_PENDING))
		evp->event.expose.count++;

	      list = list->next;
	    }
	}

      return;
    }

  update_region = _gdk_win32_hrgn_to_region (hrgn);

  _gdk_windowing_window_get_offsets (window, &xoffset, &yoffset);
  gdk_region_offset (update_region, xoffset, yoffset);
  
  _gdk_window_process_expose (window, update_region);
  gdk_region_destroy (update_region);

  DeleteObject (hrgn);
}

static void
handle_stuff_while_moving_or_resizing (void)
{
  int arbitrary_limit = 1;
  while (g_main_pending () && arbitrary_limit--)
    g_main_iteration (FALSE);
}

static VOID CALLBACK
resize_timer_proc (HWND     hwnd,
		   UINT     msg,
		   UINT     id,
		   DWORD    time)
{
  if (_sizemove_in_progress)
    handle_stuff_while_moving_or_resizing ();
}

static void
handle_display_change (void)
{
  _gdk_monitor_init ();
  _gdk_root_window_size_init ();
  g_signal_emit_by_name (_gdk_screen, "size_changed");
}

static gboolean
gdk_event_translate (GdkDisplay *display,
		     MSG        *msg,
		     gint       *ret_valp)
{
  RECT rect, *drag, orig_drag;
  POINT point;
  MINMAXINFO *mmi;
  HWND hwnd;
  HCURSOR hcursor;
  BYTE key_state[256];
  HIMC himc;

  GdkEvent *event;

  wchar_t wbuf[100];
  gint ccount;

  GdkWindow *window = NULL;
  GdkWindowImplWin32 *impl;

  GdkWindow *orig_window, *new_window;
  gint xoffset, yoffset;

  static gint update_colors_counter = 0;
  gint button;
  GdkAtom target;

  gchar buf[256];
  gboolean return_val = FALSE;

  int i;

  if (_gdk_default_filters)
    {
      /* Apply global filters */

      GdkFilterReturn result =
	apply_filters (display, NULL, msg, _gdk_default_filters);
      
      /* If result is GDK_FILTER_CONTINUE, we continue as if nothing
       * happened. If it is GDK_FILTER_REMOVE or GDK_FILTER_TRANSLATE,
       * we return TRUE, and DefWindowProc() will not be called.
       */
      if (result == GDK_FILTER_REMOVE ||
	  result == GDK_FILTER_TRANSLATE)
	return TRUE;
    }

  window = gdk_win32_handle_table_lookup ((GdkNativeWindow) msg->hwnd);
  orig_window = window;

  if (window == NULL)
    {
      /* XXX Handle WM_QUIT here ? */
      if (msg->message == WM_QUIT)
	{
	  GDK_NOTE (EVENTS, g_print (" %d", msg->wParam));
	  exit (msg->wParam);
	}
      else if (msg->message == WM_MOVE ||
	       msg->message == WM_SIZE)
	{
	  /* It's quite normal to get these messages before we have
	   * had time to register the window in our lookup table, or
	   * when the window is being destroyed and we already have
	   * removed it. Repost the same message to our queue so that
	   * we will get it later when we are prepared.
	   */
	  GDK_NOTE (EVENTS, g_print (" (posted)"));
	
	  PostMessage (msg->hwnd, msg->message,
		       msg->wParam, msg->lParam);
	}
      else if (msg->message == WM_CREATE)
	{
	  window = (UNALIGNED GdkWindow*) (((LPCREATESTRUCT) msg->lParam)->lpCreateParams);
	  GDK_WINDOW_HWND (window) = msg->hwnd;
	}
      else
	{
	  GDK_NOTE (EVENTS, g_print (" (no GdkWindow)"));
	}
      return FALSE;
    }
  
  g_object_ref (window);

  /* window's refcount has now been increased, so code below should
   * not just return from this function, but instead goto done (or
   * break out of the big switch). To protect against forgetting this,
   * #define return to a syntax error...
   */
#define return GOTO_DONE_INSTEAD
  
  if (!GDK_WINDOW_DESTROYED (window) && ((GdkWindowObject *) window)->filters)
    {
      /* Apply per-window filters */

      GdkFilterReturn result =
	apply_filters (display, window, msg, ((GdkWindowObject *) window)->filters);

      if (result == GDK_FILTER_REMOVE ||
	  result == GDK_FILTER_TRANSLATE)
	{
	  return_val = TRUE;
	  goto done;
	}
    }

  if (msg->message == msh_mousewheel)
    {
      GDK_NOTE (EVENTS, g_print (" (MSH_MOUSEWHEEL)"));
      
      /* MSG_MOUSEWHEEL is delivered to the foreground window.  Work
       * around that. Also, the position is in screen coordinates, not
       * client coordinates as with the button messages.
       */
      point.x = GET_X_LPARAM (msg->lParam);
      point.y = GET_Y_LPARAM (msg->lParam);
      if ((hwnd = WindowFromPoint (point)) == NULL)
	goto done;

      msg->hwnd = hwnd;
      if ((new_window = gdk_win32_handle_table_lookup ((GdkNativeWindow) msg->hwnd)) == NULL)
	goto done;

      assign_object (&window, new_window);

      if (!propagate (&window, msg,
		      p_grab_window, p_grab_owner_events, p_grab_mask,
		      doesnt_want_scroll, TRUE))
	goto done;

      if (GDK_WINDOW_DESTROYED (window))
	goto done;

      ScreenToClient (msg->hwnd, &point);

      event = gdk_event_new (GDK_SCROLL);
      event->scroll.window = window;
      event->scroll.direction = ((int) msg->wParam > 0) ?
	GDK_SCROLL_UP : GDK_SCROLL_DOWN;
      event->scroll.time = _gdk_win32_get_next_tick (msg->time);
      _gdk_windowing_window_get_offsets (window, &xoffset, &yoffset);
      event->scroll.x = (gint16) point.x + xoffset;
      event->scroll.y = (gint16) point.y + yoffset;
      event->scroll.x_root = (gint16) GET_X_LPARAM (msg->lParam) + _gdk_offset_x;
      event->scroll.y_root = (gint16) GET_Y_LPARAM (msg->lParam) + _gdk_offset_y;
      event->scroll.state = 0;	/* No state information with MSH_MOUSEWHEEL */
      event->scroll.device = display->core_pointer;

      append_event (display, event);

      return_val = TRUE;
      goto done;
    }
  else if (msg->message == client_message)
    {
      GList *tmp_list;
      GdkFilterReturn result = GDK_FILTER_CONTINUE;

      GDK_NOTE (EVENTS, g_print (" client_message"));

      tmp_list = client_filters;
      while (tmp_list)
	{
	  GdkClientFilter *filter = tmp_list->data;

	  tmp_list = tmp_list->next;

	  if (filter->type == GDK_POINTER_TO_ATOM (msg->wParam))
	    {
	      GList *filter_list = g_list_append (NULL, filter);
	      
	      GDK_NOTE (EVENTS, g_print (" (match)"));

	      result = apply_filters (display, window, msg, filter_list);

	      g_list_free (filter_list);

	      if (result != GDK_FILTER_CONTINUE)
		break;
	    }
	}

      if (result == GDK_FILTER_REMOVE ||
	  result == GDK_FILTER_TRANSLATE)
	{
	  return_val = TRUE;
	  goto done;
	}
      else
	{
	  /* Send unknown client messages on to Gtk for it to use */

	  event = gdk_event_new (GDK_CLIENT_EVENT);
	  event->client.window = window;
	  event->client.message_type = GDK_POINTER_TO_ATOM (msg->wParam);
	  event->client.data_format = 32;
	  event->client.data.l[0] = msg->lParam;
	  for (i = 1; i < 5; i++)
	    event->client.data.l[i] = 0;
	  
	  append_event (display, event);
	  
	  return_val = TRUE;
	  goto done;
	}
    }

  switch (msg->message)
    {
    case WM_INPUTLANGCHANGE:
      _gdk_input_locale = (HKL) msg->lParam;
      _gdk_input_locale_is_ime = ImmIsIME (_gdk_input_locale);
      GetLocaleInfo (MAKELCID (LOWORD (_gdk_input_locale), SORT_DEFAULT),
		     LOCALE_IDEFAULTANSICODEPAGE,
		     buf, sizeof (buf));
      _gdk_input_codepage = atoi (buf);
      _gdk_keymap_serial++;
      GDK_NOTE (EVENTS,
		g_print (" cs:%lu hkl:%lx%s cp:%d",
			 (gulong) msg->wParam,
			 msg->lParam, _gdk_input_locale_is_ime ? " (IME)" : "",
			 _gdk_input_codepage));
      break;

    case WM_SYSKEYUP:
    case WM_SYSKEYDOWN:
      GDK_NOTE (EVENTS,
		g_print (" %s ch:%.02x %s",
			 _gdk_win32_key_to_string (msg->lParam),
			 msg->wParam,
			 decode_key_lparam (msg->lParam)));

      /* If posted without us having keyboard focus, ignore */
      if ((msg->wParam != VK_F10 && msg->wParam != VK_MENU) &&
	  !(HIWORD (msg->lParam) & KF_ALTDOWN))
	break;

      /* Let the system handle Alt-Tab, Alt-Space, Alt-Enter and
       * Alt-F4 unless the keyboard is grabbed.
       */
      if (k_grab_window == NULL &&
	  (msg->wParam == VK_TAB ||
	   msg->wParam == VK_SPACE ||
	   msg->wParam == VK_RETURN ||
	   msg->wParam == VK_F4))
	break;

      /* Jump to code in common with WM_KEYUP and WM_KEYDOWN */
      goto keyup_or_down;

    case WM_KEYUP:
    case WM_KEYDOWN:
      GDK_NOTE (EVENTS, 
		g_print (" %s ch:%.02x %s",
			 _gdk_win32_key_to_string (msg->lParam),
			 msg->wParam,
			 decode_key_lparam (msg->lParam)));

    keyup_or_down:

      /* Ignore key messages intended for the IME */
      if (msg->wParam == VK_PROCESSKEY ||
	  in_ime_composition)
	break;

      if (!propagate (&window, msg,
		      k_grab_window, k_grab_owner_events, GDK_ALL_EVENTS_MASK,
		      doesnt_want_key, FALSE))
	break;

      if (GDK_WINDOW_DESTROYED (window))
	break;

      event = gdk_event_new ((msg->message == WM_KEYDOWN ||
			      msg->message == WM_SYSKEYDOWN) ?
			     GDK_KEY_PRESS : GDK_KEY_RELEASE);
      event->key.window = window;
      event->key.time = _gdk_win32_get_next_tick (msg->time);
      event->key.keyval = GDK_VoidSymbol;
      event->key.string = NULL;
      event->key.length = 0;
      event->key.hardware_keycode = msg->wParam;
      if (HIWORD (msg->lParam) & KF_EXTENDED)
	{
	  switch (msg->wParam)
	    {
	    case VK_CONTROL:
	      event->key.hardware_keycode = VK_RCONTROL;
	      break;
	    case VK_SHIFT:	/* Actually, KF_EXTENDED is not set
				 * for the right shift ke