mirror of https://github.com/GNOME/gimp.git
485 lines
12 KiB
C
485 lines
12 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 <stdlib.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include "libgimpwidgets/gimpwidgets.h"
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#include "tools-types.h"
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#include "gui/info-window.h"
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#include "gdisplay.h"
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#include "gimpmagnifytool.h"
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#include "tool_options.h"
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#include "tool_manager.h"
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#include "gimprc.h"
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#include "scale.h"
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#include "libgimp/gimpintl.h"
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#define WANT_MAGNIFY_BITS
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#include "icons.h"
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typedef struct _MagnifyOptions MagnifyOptions;
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struct _MagnifyOptions
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{
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GimpToolOptions tool_options;
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/* gint allow_resize_windows; (from gimprc) */
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gint allow_resize_d;
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GtkWidget *allow_resize_w;
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GimpZoomType type;
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GimpZoomType type_d;
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GtkWidget *type_w[2];
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};
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/* magnify action functions */
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static void gimp_magnify_tool_class_init (GimpMagnifyToolClass *klass);
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static void gimp_magnify_tool_init (GimpMagnifyTool *tool);
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static void gimp_magnify_tool_destroy (GtkObject *object);
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static void gimp_magnify_tool_button_press (GimpTool *tool,
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GdkEventButton *bevent,
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GDisplay *gdisp);
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static void gimp_magnify_tool_button_release (GimpTool *tool,
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GdkEventButton *bevent,
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GDisplay *gdisp);
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static void gimp_magnify_tool_motion (GimpTool *tool,
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GdkEventMotion *mevent,
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GDisplay *gdisp);
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static void gimp_magnify_tool_modifier_key (GimpTool *tool,
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GdkEventKey *kevent,
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GDisplay *gdisp);
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static void gimp_magnify_tool_cursor_update (GimpTool *tool,
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GdkEventMotion *mevent,
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GDisplay *gdisp);
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static void gimp_magnify_tool_draw (GimpDrawTool *draw_tool);
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/* magnify utility functions */
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static void zoom_in (gint *src,
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gint *dest,
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gint scale);
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static void zoom_out (gint *src,
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gint *dest,
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gint scale);
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static MagnifyOptions * magnify_options_new (void);
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static void magnify_options_reset (GimpToolOptions *tool_options);
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static MagnifyOptions *magnify_options = NULL;
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static GimpDrawToolClass *parent_class = NULL;
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void
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gimp_magnify_tool_register (Gimp *gimp)
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{
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tool_manager_register_tool (gimp,
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GIMP_TYPE_MAGNIFY_TOOL,
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FALSE,
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"gimp:magnify_tool",
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_("Magnify"),
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_("Zoom in & out"),
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N_("/Tools/Magnify"), NULL,
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NULL, "tools/magnify.html",
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(const gchar **) magnify_bits);
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}
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GtkType
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gimp_magnify_tool_get_type (void)
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{
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static GtkType tool_type = 0;
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if (! tool_type)
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{
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GtkTypeInfo tool_info =
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{
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"GimpMagnifyTool",
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sizeof (GimpMagnifyTool),
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sizeof (GimpMagnifyToolClass),
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(GtkClassInitFunc) gimp_magnify_tool_class_init,
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(GtkObjectInitFunc) gimp_magnify_tool_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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tool_type = gtk_type_unique (GIMP_TYPE_DRAW_TOOL, &tool_info);
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}
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return tool_type;
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}
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static void
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gimp_magnify_tool_class_init (GimpMagnifyToolClass *klass)
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{
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GtkObjectClass *object_class;
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GimpToolClass *tool_class;
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GimpDrawToolClass *draw_tool_class;
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object_class = (GtkObjectClass *) klass;
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tool_class = (GimpToolClass *) klass;
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draw_tool_class = (GimpDrawToolClass *) klass;
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parent_class = gtk_type_class (GIMP_TYPE_DRAW_TOOL);
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object_class->destroy = gimp_magnify_tool_destroy;
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tool_class->button_press = gimp_magnify_tool_button_press;
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tool_class->button_release = gimp_magnify_tool_button_release;
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tool_class->motion = gimp_magnify_tool_motion;
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tool_class->modifier_key = gimp_magnify_tool_modifier_key;
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tool_class->cursor_update = gimp_magnify_tool_cursor_update;
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draw_tool_class->draw = gimp_magnify_tool_draw;
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}
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static void
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gimp_magnify_tool_init (GimpMagnifyTool *magnify_tool)
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{
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GimpTool *tool;
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tool = GIMP_TOOL (magnify_tool);
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if (! magnify_options)
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{
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magnify_options = magnify_options_new ();
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tool_manager_register_tool_options (GIMP_TYPE_MAGNIFY_TOOL,
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(GimpToolOptions *) magnify_options);
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}
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tool->scroll_lock = TRUE; /* Disallow scrolling */
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tool->auto_snap_to = FALSE; /* Don't snap to guides */
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magnify_tool->x = 0;
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magnify_tool->y = 0;
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magnify_tool->w = 0;
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magnify_tool->h = 0;
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}
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static void
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gimp_magnify_tool_destroy (GtkObject *object)
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{
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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/* magnify tool options functions */
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static void
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magnify_options_reset (GimpToolOptions *tool_options)
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{
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MagnifyOptions *options;
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options = (MagnifyOptions *) tool_options;
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->allow_resize_w),
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options->allow_resize_d);
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gtk_toggle_button_set_active
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(GTK_TOGGLE_BUTTON (options->type_w[options->type_d]), TRUE);
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}
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static MagnifyOptions *
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magnify_options_new (void)
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{
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MagnifyOptions *options;
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GtkWidget *vbox;
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GtkWidget *frame;
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/* the new magnify tool options structure */
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options = g_new0 (MagnifyOptions, 1);
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tool_options_init ((GimpToolOptions *) options,
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magnify_options_reset);
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options->allow_resize_d = gimprc.allow_resize_windows;
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options->type_d = options->type = GIMP_ZOOM_IN;
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/* the main vbox */
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vbox = options->tool_options.main_vbox;
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/* the allow_resize toggle button */
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options->allow_resize_w =
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gtk_check_button_new_with_label (_("Allow Window Resizing"));
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gtk_signal_connect (GTK_OBJECT (options->allow_resize_w), "toggled",
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GTK_SIGNAL_FUNC (gimp_toggle_button_update),
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&(gimprc.allow_resize_windows));
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->allow_resize_w),
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gimprc.allow_resize_windows);
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gtk_box_pack_start (GTK_BOX (vbox), options->allow_resize_w, FALSE, FALSE, 0);
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gtk_widget_show (options->allow_resize_w);
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/* tool toggle */
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frame =
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gimp_radio_group_new2 (TRUE, _("Tool Toggle"),
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gimp_radio_button_update,
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&options->type, (gpointer) options->type,
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_("Zoom in"), (gpointer) GIMP_ZOOM_IN,
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&options->type_w[0],
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_("Zoom out"), (gpointer) GIMP_ZOOM_OUT,
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&options->type_w[1],
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NULL);
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gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
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gtk_widget_show (frame);
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return options;
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}
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/* magnify utility functions */
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static void
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zoom_in (gint *src,
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gint *dest,
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gint scale)
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{
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while (scale--)
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{
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if (*src > 1)
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(*src)--;
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else
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if (*dest < 0x10)
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(*dest)++;
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}
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}
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static void
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zoom_out (gint *src,
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gint *dest,
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gint scale)
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{
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while (scale--)
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{
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if (*dest > 1)
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(*dest)--;
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else
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if (*src < 0x10)
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(*src)++;
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}
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}
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/* magnify action functions */
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static void
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gimp_magnify_tool_button_press (GimpTool *tool,
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GdkEventButton *bevent,
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GDisplay *gdisp)
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{
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GimpMagnifyTool *magnify;
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gint x, y;
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magnify = GIMP_MAGNIFY_TOOL (tool);
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gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, TRUE, 0);
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magnify->x = x;
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magnify->y = y;
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magnify->w = 0;
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magnify->h = 0;
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gdk_pointer_grab (gdisp->canvas->window, FALSE,
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GDK_POINTER_MOTION_HINT_MASK |
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GDK_BUTTON1_MOTION_MASK |
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GDK_BUTTON_RELEASE_MASK,
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NULL, NULL, bevent->time);
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tool->state = ACTIVE;
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tool->gdisp = gdisp;
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gimp_draw_tool_start (GIMP_DRAW_TOOL (tool),
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gdisp->canvas->window);
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}
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static void
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gimp_magnify_tool_button_release (GimpTool *tool,
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GdkEventButton *bevent,
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GDisplay *gdisp)
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{
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GimpMagnifyTool *magnify;
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gint win_width, win_height;
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gint width, height;
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gint scalesrc, scaledest;
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gint scale;
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gint x1, y1, x2, y2, w, h;
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magnify = GIMP_MAGNIFY_TOOL (tool);
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gdk_pointer_ungrab (bevent->time);
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gdk_flush ();
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gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
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tool->state = INACTIVE;
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/* First take care of the case where the user "cancels" the action */
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if (! (bevent->state & GDK_BUTTON3_MASK))
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{
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x1 = (magnify->w < 0) ? magnify->x + magnify->w : magnify->x;
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y1 = (magnify->h < 0) ? magnify->y + magnify->h : magnify->y;
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w = (magnify->w < 0) ? -magnify->w : magnify->w;
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h = (magnify->h < 0) ? -magnify->h : magnify->h;
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x2 = x1 + w;
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y2 = y1 + h;
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/* these change the user zoom level, so should not be changed to
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* the resolution-aware scale macros -- austin */
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scalesrc = SCALESRC (gdisp);
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scaledest = SCALEDEST (gdisp);
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win_width = gdisp->disp_width;
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win_height = gdisp->disp_height;
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width = (win_width * scalesrc) / scaledest;
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height = (win_height * scalesrc) / scaledest;
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if (!w || !h)
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scale = 1;
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else
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scale = MIN ((width / w), (height / h));
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magnify->op = magnify_options->type;
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switch (magnify->op)
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{
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case GIMP_ZOOM_IN:
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zoom_in (&scalesrc, &scaledest, scale);
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break;
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case GIMP_ZOOM_OUT:
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zoom_out (&scalesrc, &scaledest, scale);
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break;
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}
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gdisp->scale = (scaledest << 8) + scalesrc;
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gdisp->offset_x = (scaledest * ((x1 + x2) / 2)) / scalesrc -
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(win_width / 2);
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gdisp->offset_y = (scaledest * ((y1 + y2) / 2)) / scalesrc -
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(win_height / 2);
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/* resize the image */
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resize_display (gdisp, gimprc.allow_resize_windows, TRUE);
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}
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}
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static void
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gimp_magnify_tool_motion (GimpTool *tool,
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GdkEventMotion *mevent,
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GDisplay *gdisp)
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{
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GimpMagnifyTool *magnify;
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gint x, y;
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if (tool->state != ACTIVE)
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return;
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magnify = GIMP_MAGNIFY_TOOL (tool);
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gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
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gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, TRUE, 0);
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magnify->w = (x - magnify->x);
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magnify->h = (y - magnify->y);
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gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
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}
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static void
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gimp_magnify_tool_modifier_key (GimpTool *tool,
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GdkEventKey *kevent,
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GDisplay *gdisp)
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{
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switch (kevent->keyval)
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{
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case GDK_Alt_L: case GDK_Alt_R:
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break;
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case GDK_Shift_L: case GDK_Shift_R:
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break;
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case GDK_Control_L: case GDK_Control_R:
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if (magnify_options->type == GIMP_ZOOM_IN)
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gtk_toggle_button_set_active
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(GTK_TOGGLE_BUTTON (magnify_options->type_w[GIMP_ZOOM_OUT]), TRUE);
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else
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gtk_toggle_button_set_active
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(GTK_TOGGLE_BUTTON (magnify_options->type_w[GIMP_ZOOM_IN]), TRUE);
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break;
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}
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}
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static void
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gimp_magnify_tool_cursor_update (GimpTool *tool,
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GdkEventMotion *mevent,
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GDisplay *gdisp)
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{
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if (magnify_options->type == GIMP_ZOOM_IN)
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{
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gdisplay_install_tool_cursor (gdisp,
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GIMP_ZOOM_CURSOR,
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GIMP_ZOOM_TOOL_CURSOR,
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GIMP_CURSOR_MODIFIER_PLUS);
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}
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else
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{
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gdisplay_install_tool_cursor (gdisp,
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GIMP_ZOOM_CURSOR,
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GIMP_ZOOM_TOOL_CURSOR,
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GIMP_CURSOR_MODIFIER_MINUS);
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}
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}
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static void
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gimp_magnify_tool_draw (GimpDrawTool *draw_tool)
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{
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GimpMagnifyTool *magnify;
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GimpTool *tool;
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gint x1, y1, x2, y2;
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magnify = GIMP_MAGNIFY_TOOL (draw_tool);
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tool = GIMP_TOOL (draw_tool);
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x1 = MIN (magnify->x, magnify->x + magnify->w);
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y1 = MIN (magnify->y, magnify->y + magnify->h);
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x2 = MAX (magnify->x, magnify->x + magnify->w);
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y2 = MAX (magnify->y, magnify->y + magnify->h);
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gdisplay_transform_coords (tool->gdisp, x1, y1, &x1, &y1, 0);
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gdisplay_transform_coords (tool->gdisp, x2, y2, &x2, &y2, 0);
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gdk_draw_rectangle (draw_tool->win, draw_tool->gc, 0,
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x1, y1, (x2 - x1), (y2 - y1));
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}
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