mirror of https://github.com/GNOME/gimp.git
460 lines
11 KiB
C
460 lines
11 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 <stdlib.h>
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#include <gdk/gdkkeysyms.h>
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#include "appenv.h"
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#include "cursorutil.h"
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#include "draw_core.h"
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#include "gdisplay.h"
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#include "gimprc.h"
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#include "gimpui.h"
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#include "info_window.h"
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#include "magnify.h"
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#include "scale.h"
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#include "config.h"
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#include "libgimp/gimpintl.h"
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/* the magnify structures */
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typedef struct _Magnify Magnify;
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struct _Magnify
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{
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DrawCore *core; /* Core select object */
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gint x, y; /* upper left hand coordinate */
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gint w, h; /* width and height */
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gint op; /* magnify operation */
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};
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typedef struct _MagnifyOptions MagnifyOptions;
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struct _MagnifyOptions
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{
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ToolOptions 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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ZoomType type;
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ZoomType type_d;
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GtkWidget *type_w[2];
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};
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/* the magnify tool options */
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static MagnifyOptions *magnify_options = NULL;
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/* magnify action functions */
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static void magnify_button_press (Tool *, GdkEventButton *, gpointer);
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static void magnify_button_release (Tool *, GdkEventButton *, gpointer);
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static void magnify_motion (Tool *, GdkEventMotion *, gpointer);
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static void magnify_modifier_update (Tool *, GdkEventKey *, gpointer);
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static void magnify_cursor_update (Tool *, GdkEventMotion *, gpointer);
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static void magnify_control (Tool *, ToolAction, gpointer);
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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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/* magnify tool options functions */
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static void
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magnify_options_reset (void)
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{
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MagnifyOptions *options = magnify_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_new (MagnifyOptions, 1);
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tool_options_init ((ToolOptions *) options,
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_("Magnify Tool"),
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magnify_options_reset);
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options->allow_resize_d = allow_resize_windows;
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options->type_d = options->type = ZOOMIN;
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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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&allow_resize_windows);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->allow_resize_w),
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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) ZOOMIN,
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&options->type_w[0],
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_("Zoom out"), (gpointer) ZOOMOUT,
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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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magnify_button_press (Tool *tool,
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GdkEventButton *bevent,
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gpointer gdisp_ptr)
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{
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GDisplay *gdisp;
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Magnify *magnify;
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gint x, y;
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gdisp = (GDisplay *) gdisp_ptr;
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magnify = (Magnify *) tool->private;
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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_ptr = gdisp_ptr;
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draw_core_start (magnify->core,
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gdisp->canvas->window,
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tool);
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}
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static void
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magnify_button_release (Tool *tool,
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GdkEventButton *bevent,
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gpointer gdisp_ptr)
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{
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Magnify *magnify;
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GDisplay *gdisp;
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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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gdisp = (GDisplay *) gdisp_ptr;
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magnify = (Magnify *) tool->private;
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gdk_pointer_ungrab (bevent->time);
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gdk_flush ();
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draw_core_stop (magnify->core, 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 ZOOMIN:
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zoom_in (&scalesrc, &scaledest, scale);
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break;
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case ZOOMOUT:
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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, allow_resize_windows, TRUE);
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}
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}
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static void
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magnify_motion (Tool *tool,
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GdkEventMotion *mevent,
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gpointer gdisp_ptr)
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{
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Magnify *magnify;
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GDisplay *gdisp;
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gint x, y;
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if (tool->state != ACTIVE)
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return;
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gdisp = (GDisplay *) gdisp_ptr;
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magnify = (Magnify *) tool->private;
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draw_core_pause (magnify->core, 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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draw_core_resume (magnify->core, tool);
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}
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static void
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magnify_modifier_update (Tool *tool,
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GdkEventKey *kevent,
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gpointer gdisp_ptr)
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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 == ZOOMIN)
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gtk_toggle_button_set_active
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(GTK_TOGGLE_BUTTON (magnify_options->type_w[ZOOMOUT]), 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[ZOOMIN]), TRUE);
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break;
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}
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}
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static void
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magnify_cursor_update (Tool *tool,
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GdkEventMotion *mevent,
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gpointer gdisp_ptr)
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{
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GDisplay *gdisp;
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gdisp = (GDisplay *) gdisp_ptr;
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if (magnify_options->type == ZOOMIN)
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{
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gdisplay_install_tool_cursor (gdisp, GIMP_ZOOM_CURSOR,
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MAGNIFY,
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CURSOR_MODIFIER_PLUS,
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FALSE);
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}
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else
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{
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gdisplay_install_tool_cursor (gdisp, GIMP_ZOOM_CURSOR,
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MAGNIFY,
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CURSOR_MODIFIER_MINUS,
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FALSE);
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}
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}
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void
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magnify_draw (Tool *tool)
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{
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GDisplay *gdisp;
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Magnify *magnify;
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gint x1, y1, x2, y2;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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magnify = (Magnify *) tool->private;
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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 (gdisp, x1, y1, &x1, &y1, 0);
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gdisplay_transform_coords (gdisp, x2, y2, &x2, &y2, 0);
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gdk_draw_rectangle (magnify->core->win, magnify->core->gc, 0,
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x1, y1, (x2 - x1), (y2 - y1));
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}
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static void
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magnify_control (Tool *tool,
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ToolAction action,
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gpointer gdisp_ptr)
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{
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Magnify *magnify;
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magnify = (Magnify *) tool->private;
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switch (action)
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{
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case PAUSE:
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draw_core_pause (magnify->core, tool);
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break;
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case RESUME:
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draw_core_resume (magnify->core, tool);
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break;
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case HALT:
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draw_core_stop (magnify->core, tool);
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break;
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default:
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break;
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}
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}
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Tool *
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tools_new_magnify (void)
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{
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Tool *tool;
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Magnify *private;
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/* The tool options */
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if (! magnify_options)
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{
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magnify_options = magnify_options_new ();
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tools_register (MAGNIFY, (ToolOptions *) magnify_options);
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}
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tool = tools_new_tool (MAGNIFY);
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private = g_new0 (Magnify, 1);
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private->core = draw_core_new (magnify_draw);
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private->x = private->y = 0;
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private->w = private->h = 0;
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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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tool->private = (void *) private;
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tool->button_press_func = magnify_button_press;
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tool->button_release_func = magnify_button_release;
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tool->motion_func = magnify_motion;
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tool->modifier_key_func = magnify_modifier_update;
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tool->cursor_update_func = magnify_cursor_update;
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tool->control_func = magnify_control;
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return tool;
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}
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void
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tools_free_magnify (Tool *tool)
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{
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Magnify *magnify;
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magnify = (Magnify *) tool->private;
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draw_core_free (magnify->core);
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g_free (magnify);
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}
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