mirror of https://github.com/GNOME/gimp.git
131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "display-types.h"
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#include "config/gimpdisplayconfig.h"
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#include "core/gimp.h"
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#include "core/gimpimage.h"
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#include "gimpdisplay.h"
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#include "gimpdisplay-handlers.h"
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/* local function prototypes */
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static void gimp_display_update_handler (GimpProjection *projection,
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gboolean now,
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gint x,
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gint y,
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gint w,
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gint h,
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GimpDisplay *gdisp);
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static void gimp_display_flush_handler (GimpImage *gimage,
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GimpDisplay *gdisp);
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/* public functions */
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void
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gimp_display_connect (GimpDisplay *gdisp,
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GimpImage *gimage)
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{
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g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
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g_return_if_fail (GIMP_IS_IMAGE (gimage));
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g_return_if_fail (gdisp->gimage == NULL);
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gdisp->gimage = gimage;
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gdisp->instance = gimage->instance_count;
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gimage->instance_count++; /* this is obsolete */
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gimage->disp_count++;
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#if 0
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g_print ("%s: gimage->ref_count before refing: %d\n",
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G_STRFUNC, G_OBJECT (gdisp->gimage)->ref_count);
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#endif
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g_object_ref (gimage);
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g_signal_connect (gimage->projection, "update",
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G_CALLBACK (gimp_display_update_handler),
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gdisp);
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g_signal_connect (gimage, "flush",
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G_CALLBACK (gimp_display_flush_handler),
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gdisp);
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}
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void
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gimp_display_disconnect (GimpDisplay *gdisp)
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{
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GimpImage *gimage;
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g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
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g_return_if_fail (GIMP_IS_IMAGE (gdisp->gimage));
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g_signal_handlers_disconnect_by_func (gdisp->gimage,
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gimp_display_flush_handler,
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gdisp);
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g_signal_handlers_disconnect_by_func (gdisp->gimage->projection,
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gimp_display_update_handler,
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gdisp);
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gdisp->gimage->disp_count--;
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#if 0
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g_print ("%s: gimage->ref_count before unrefing: %d\n",
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G_STRFUNC, G_OBJECT (gdisp->gimage)->ref_count);
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#endif
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/* set gdisp->gimage to NULL before unrefing because there may be code
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* that listenes for image removals and then iterates the display list
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* to find a valid display.
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*/
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gimage = gdisp->gimage;
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gdisp->gimage = NULL;
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g_object_unref (gimage);
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}
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/* private functions */
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static void
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gimp_display_update_handler (GimpProjection *projection,
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gboolean now,
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gint x,
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gint y,
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gint w,
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gint h,
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GimpDisplay *gdisp)
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{
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gimp_display_update_area (gdisp, now, x, y, w, h);
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}
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static void
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gimp_display_flush_handler (GimpImage *gimage,
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GimpDisplay *gdisp)
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{
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gimp_display_flush (gdisp);
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}
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