gdkgeometry-win32.c

linux下电话本所依赖的一些图形库

/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* gdkgeometry-win32.c: emulation of 32 bit coordinates within the
 * limits of Win32 GDI. The idea of big window emulation is more or less
 * a copy of the X11 version, and the equvalent of guffaw scrolling
 * is ScrollWindowEx(). While we determine the invalidated region
 * ourself during scrolling, we do not pass SW_INVALIDATE to
 * ScrollWindowEx() to avoid a unnecessary WM_PAINT.
 *
 * Bits are always scrolled correctly by ScrollWindowEx(), but
 * some big children may hit the coordinate boundary (i.e.
 * win32_x/win32_y < -16383) after scrolling. They needed to be moved
 * back to the real position determined by gdk_window_compute_position().
 * This is handled in gdk_window_postmove().
 * 
 * The X11 version by Owen Taylor <[e-mail]>
 * Copyright Red Hat, Inc. 2000
 * Win32 hack by Tor Lillqvist <[e-mail]>
 * and Hans Breuer <[e-mail]>
 * Modified by Ivan, Wong Yat Cheung <[e-mail]>
 * so that big window emulation finally works.
 */

#include <config.h>
#include "gdk.h"		/* For gdk_rectangle_intersect */
#include "gdkregion.h"
#include "gdkregion-generic.h"
#include "gdkprivate-win32.h"

#define SIZE_LIMIT 32767

typedef struct _GdkWindowParentPos GdkWindowParentPos;

struct _GdkWindowParentPos
{
  gint x;
  gint y;
  gint win32_x;
  gint win32_y;
  GdkRectangle clip_rect;
};

static void gdk_window_compute_position   (GdkWindowImplWin32     *window,
					   GdkWindowParentPos     *parent_pos,
					   GdkWin32PositionInfo   *info);
static void gdk_window_compute_parent_pos (GdkWindowImplWin32     *window,
					   GdkWindowParentPos     *parent_pos);

static void gdk_window_postmove           (GdkWindow          *window,
					   GdkWindowParentPos *parent_pos,
					   gboolean	      anti_scroll);
static void gdk_window_tmp_unset_bg       (GdkWindow          *window);
static void gdk_window_tmp_reset_bg       (GdkWindow          *window);
static GdkRegion *gdk_window_clip_changed (GdkWindow          *window,
					   GdkRectangle       *old_clip,
					   GdkRectangle       *new_clip);
static void gdk_window_post_scroll        (GdkWindow          *window,
			                   GdkRegion          *new_clip_region);

void
_gdk_windowing_window_get_offsets (GdkWindow *window,
				   gint      *x_offset,
				   gint      *y_offset)
{
  GdkWindowImplWin32 *impl =
    GDK_WINDOW_IMPL_WIN32 (GDK_WINDOW_OBJECT (window)->impl);

  *x_offset = impl->position_info.x_offset;
  *y_offset = impl->position_info.y_offset;
}

void
_gdk_window_init_position (GdkWindow *window)
{
  GdkWindowParentPos parent_pos;
  GdkWindowImplWin32 *impl;
  
  g_return_if_fail (GDK_IS_WINDOW (window));
  
  impl = GDK_WINDOW_IMPL_WIN32 (GDK_WINDOW_OBJECT (window)->impl);
  
  gdk_window_compute_parent_pos (impl, &parent_pos);
  gdk_window_compute_position (impl, &parent_pos, &impl->position_info);
}

void
gdk_window_scroll (GdkWindow *window,
		   gint       dx,
		   gint       dy)
{
  GdkRegion *invalidate_region;
  GdkWindowImplWin32 *impl;
  GdkWindowObject *obj;
  GdkRectangle dest_rect;
  GList *tmp_list;
  GdkWindowParentPos parent_pos;
  
  g_return_if_fail (GDK_IS_WINDOW (window));

  if (GDK_WINDOW_DESTROYED (window))
    return;
  
  GDK_NOTE (EVENTS, g_print ("gdk_window_scroll: %p %d,%d\n",
			     GDK_WINDOW_HWND (window), dx, dy));

  obj = GDK_WINDOW_OBJECT (window);
  impl = GDK_WINDOW_IMPL_WIN32 (obj->impl);  

  if (dx == 0 && dy == 0)
    return;
  
  /* Move the current invalid region */
  if (obj->update_area)
    gdk_region_offset (obj->update_area, dx, dy);
  
  invalidate_region = gdk_region_rectangle (&impl->position_info.clip_rect);
  
  dest_rect = impl->position_info.clip_rect;
  dest_rect.x += dx;
  dest_rect.y += dy;
  gdk_rectangle_intersect (&dest_rect, &impl->position_info.clip_rect, &dest_rect);

  if (dest_rect.width > 0 && dest_rect.height > 0)
    {
      GdkRegion *tmp_region;

      tmp_region = gdk_region_rectangle (&dest_rect);
      gdk_region_subtract (invalidate_region, tmp_region);
      gdk_region_destroy (tmp_region);
    }
  
  gdk_window_compute_parent_pos (impl, &parent_pos);

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

  gdk_window_tmp_unset_bg (window);

  if (!ScrollWindowEx (GDK_WINDOW_HWND (window),
		       dx, dy, NULL, NULL,
		       NULL, NULL, SW_SCROLLCHILDREN))
    WIN32_API_FAILED ("ScrollWindowEx");

  if (impl->position_info.no_bg)
    gdk_window_tmp_reset_bg (window);
  
  tmp_list = obj->children;
  while (tmp_list)
    {
      GDK_WINDOW_OBJECT(tmp_list->data)->x += dx;
      GDK_WINDOW_OBJECT(tmp_list->data)->y += dy;
      gdk_window_postmove (tmp_list->data, &parent_pos, FALSE);
      tmp_list = tmp_list->next;
    }

  gdk_window_invalidate_region (window, invalidate_region, TRUE);
  gdk_region_destroy (invalidate_region);
}

void
_gdk_window_move_resize_child (GdkWindow *window,
			       gint       x,
			       gint       y,
			       gint       width,
			       gint       height)
{
  GdkWindowImplWin32 *impl;
  GdkWindowObject *obj;
  GdkWin32PositionInfo new_info;
  GdkWindowParentPos parent_pos;
  GList *tmp_list;
  gint d_xoffset, d_yoffset;
  gint dx, dy;
  gboolean is_move;
  gboolean is_resize;
  GdkRegion *new_clip_region;
  
  g_return_if_fail (window != NULL);
  g_return_if_fail (GDK_IS_WINDOW (window));

  obj = GDK_WINDOW_OBJECT (window);
  impl = GDK_WINDOW_IMPL_WIN32 (obj->impl);
  
  GDK_NOTE (MISC, g_print ("_gdk_window_move_resize_child: %s@+%d+%d %dx%d@+%d+%d\n",
			   _gdk_win32_drawable_description (window),
			   obj->x, obj->y,
			   width, height, x, y));

  dx = x - obj->x;
  dy = y - obj->y;
  
  is_move = dx != 0 || dy != 0;
  is_resize = impl->width != width || impl->height != height;

  if (!is_move && !is_resize)
    {
      GDK_NOTE (MISC, g_print ("...neither move or resize\n"));
      return;
    }
  
  GDK_NOTE (MISC, g_print ("...%s%s\n", is_move ? "is_move " : "", is_resize ? "is_resize" : ""));

  obj->x = x;
  obj->y = y;
  impl->width = width;
  impl->height = height;

  gdk_window_compute_parent_pos (impl, &parent_pos);
  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);

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

  d_xoffset = new_info.x_offset - impl->position_info.x_offset;
  d_yoffset = new_info.y_offset - impl->position_info.y_offset;
  
  if (d_xoffset != 0 || d_yoffset != 0)
    {
      GDK_NOTE (MISC, g_print ("...d_xoffset=%d d_yoffset=%d\n", d_xoffset, d_yoffset));

      if (!ScrollWindowEx (GDK_WINDOW_HWND (window),
			   -d_xoffset, -d_yoffset, /* in: scroll offsets */
			   NULL, /* in: scroll rect, NULL == entire client area */
			   NULL, /* in: restrict to */
			   NULL, /* in: update region */
			   NULL, /* out: update rect */
			   SW_SCROLLCHILDREN))
	WIN32_API_FAILED ("ScrollWindowEx");

      if (dx != d_xoffset || dy != d_yoffset || is_resize)
	{
	  GDK_NOTE (MISC, g_print ("...SetWindowPos(%p,%dx%d@+%d+%d)\n",
				   GDK_WINDOW_HWND (window),
				   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, 
			     new_info.width, new_info.height,
			     SWP_NOACTIVATE | SWP_NOZORDER | 
			     (is_move ? 0 : SWP_NOMOVE) |
			     (is_resize ? 0 : SWP_NOSIZE)))
	    WIN32_API_FAILED ("SetWindowPos");
	}

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

      if (!impl->position_info.mapped && new_info.mapped && GDK_WINDOW_IS_MAPPED (obj))
	{
	  GDK_NOTE (MISC, g_print ("...ShowWindow(%p, SW_SHOWNA)\n",
				   GDK_WINDOW_HWND (window)));
	  ShowWindow (GDK_WINDOW_HWND (window), SW_SHOWNA);
	}

      impl->position_info = new_info;
      
      tmp_list = obj->children;
      while (tmp_list)
	{
	  gdk_window_postmove (tmp_list->data, &parent_pos, FALSE);
	  tmp_list = tmp_list->next;
	}
    }
  else
    {
      if (impl->position_info.mapped && !new_info.mapped)
	{
	  GDK_NOTE (MISC, g_print ("...ShowWindow(%p, SW_HIDE)\n",
				   GDK_WINDOW_HWND (window)));
	  ShowWindow (GDK_WINDOW_HWND (window), SW_HIDE);
	}
      
      GDK_NOTE (MISC, g_print ("...SetWindowPos(%p,%dx%d@+%d+%d)\n",
			       GDK_WINDOW_HWND (window),
			       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, 
                         new_info.width, new_info.height,
                         SWP_NOACTIVATE | SWP_NOZORDER | 
                         (is_move ? 0 : SWP_NOMOVE) |
                         (is_resize ? 0 : SWP_NOSIZE)))
        WIN32_API_FAILED ("SetWindowPos");

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

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

      if (!impl->position_info.mapped && new_info.mapped && GDK_WINDOW_IS_MAPPED (obj))
	{
	  GDK_NOTE (MISC, g_print ("...ShowWindow(%p, SW_SHOWNA)\n",
				   GDK_WINDOW_HWND (window)));
	  ShowWindow (GDK_WINDOW_HWND (window), SW_SHOWNA);
	}

      impl->position_info = new_info;
    }
  if (new_clip_region)
    gdk_window_post_scroll (window, new_clip_region);
}

static void
gdk_window_compute_position (GdkWindowImplWin32   *window,
			     GdkWindowParentPos   *parent_pos,
			     GdkWin32PositionInfo *info)
{
  GdkWindowObject *wrapper;