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gimp/app/tools/gimpmagnifytool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "gui/info-window.h"
#include "gdisplay.h"
#include "gimpmagnifytool.h"
#include "tool_options.h"
#include "tool_manager.h"
#include "gimprc.h"
#include "scale.h"
#include "libgimp/gimpintl.h"
typedef struct _MagnifyOptions MagnifyOptions;
struct _MagnifyOptions
{
GimpToolOptions tool_options;
/* gint allow_resize_windows; (from gimprc) */
gint allow_resize_d;
GtkWidget *allow_resize_w;
GimpZoomType type;
GimpZoomType type_d;
GtkWidget *type_w[2];
};
/* magnify action functions */
static void gimp_magnify_tool_class_init (GimpMagnifyToolClass *klass);
static void gimp_magnify_tool_init (GimpMagnifyTool *tool);
static void gimp_magnify_tool_destroy (GtkObject *object);
static void gimp_magnify_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp);
static void gimp_magnify_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp);
static void gimp_magnify_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp);
static void gimp_magnify_tool_modifier_key (GimpTool *tool,
GdkEventKey *kevent,
GDisplay *gdisp);
static void gimp_magnify_tool_cursor_update (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp);
static void gimp_magnify_tool_draw (GimpDrawTool *draw_tool);
/* magnify utility functions */
static void zoom_in (gint *src,
gint *dest,
gint scale);
static void zoom_out (gint *src,
gint *dest,
gint scale);
static MagnifyOptions * magnify_options_new (void);
static void magnify_options_reset (GimpToolOptions *tool_options);
static MagnifyOptions *magnify_options = NULL;
static GimpDrawToolClass *parent_class = NULL;
void
gimp_magnify_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_MAGNIFY_TOOL,
FALSE,
"gimp:magnify_tool",
_("Magnify"),
_("Zoom in & out"),
N_("/Tools/Magnify"), NULL,
NULL, "tools/magnify.html",
GIMP_STOCK_TOOL_ZOOM);
}
GtkType
gimp_magnify_tool_get_type (void)
{
static GtkType tool_type = 0;
if (! tool_type)
{
GtkTypeInfo tool_info =
{
"GimpMagnifyTool",
sizeof (GimpMagnifyTool),
sizeof (GimpMagnifyToolClass),
(GtkClassInitFunc) gimp_magnify_tool_class_init,
(GtkObjectInitFunc) gimp_magnify_tool_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
tool_type = gtk_type_unique (GIMP_TYPE_DRAW_TOOL, &tool_info);
}
return tool_type;
}
static void
gimp_magnify_tool_class_init (GimpMagnifyToolClass *klass)
{
GtkObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
object_class = (GtkObjectClass *) klass;
tool_class = (GimpToolClass *) klass;
draw_tool_class = (GimpDrawToolClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_DRAW_TOOL);
object_class->destroy = gimp_magnify_tool_destroy;
tool_class->button_press = gimp_magnify_tool_button_press;
tool_class->button_release = gimp_magnify_tool_button_release;
tool_class->motion = gimp_magnify_tool_motion;
tool_class->modifier_key = gimp_magnify_tool_modifier_key;
tool_class->cursor_update = gimp_magnify_tool_cursor_update;
draw_tool_class->draw = gimp_magnify_tool_draw;
}
static void
gimp_magnify_tool_init (GimpMagnifyTool *magnify_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (magnify_tool);
if (! magnify_options)
{
magnify_options = magnify_options_new ();
tool_manager_register_tool_options (GIMP_TYPE_MAGNIFY_TOOL,
(GimpToolOptions *) magnify_options);
}
tool->scroll_lock = TRUE; /* Disallow scrolling */
tool->auto_snap_to = FALSE; /* Don't snap to guides */
magnify_tool->x = 0;
magnify_tool->y = 0;
magnify_tool->w = 0;
magnify_tool->h = 0;
}
static void
gimp_magnify_tool_destroy (GtkObject *object)
{
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
/* magnify tool options functions */
static void
magnify_options_reset (GimpToolOptions *tool_options)
{
MagnifyOptions *options;
options = (MagnifyOptions *) tool_options;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->allow_resize_w),
options->allow_resize_d);
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (options->type_w[options->type_d]), TRUE);
}
static MagnifyOptions *
magnify_options_new (void)
{
MagnifyOptions *options;
GtkWidget *vbox;
GtkWidget *frame;
/* the new magnify tool options structure */
options = g_new0 (MagnifyOptions, 1);
tool_options_init ((GimpToolOptions *) options,
magnify_options_reset);
options->allow_resize_d = gimprc.allow_resize_windows;
options->type_d = options->type = GIMP_ZOOM_IN;
/* the main vbox */
vbox = options->tool_options.main_vbox;
/* the allow_resize toggle button */
options->allow_resize_w =
gtk_check_button_new_with_label (_("Allow Window Resizing"));
g_signal_connect (G_OBJECT (options->allow_resize_w), "toggled",
G_CALLBACK (gimp_toggle_button_update),
&(gimprc.allow_resize_windows));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->allow_resize_w),
gimprc.allow_resize_windows);
gtk_box_pack_start (GTK_BOX (vbox),
options->allow_resize_w, FALSE, FALSE, 0);
gtk_widget_show (options->allow_resize_w);
/* tool toggle */
frame =
gimp_radio_group_new2 (TRUE, _("Tool Toggle"),
G_CALLBACK (gimp_radio_button_update),
&options->type,
(gpointer) options->type,
_("Zoom in"), (gpointer) GIMP_ZOOM_IN,
&options->type_w[0],
_("Zoom out"), (gpointer) GIMP_ZOOM_OUT,
&options->type_w[1],
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
return options;
}
/* magnify utility functions */
static void
zoom_in (gint *src,
gint *dest,
gint scale)
{
while (scale--)
{
if (*src > 1)
(*src)--;
else
if (*dest < 0x10)
(*dest)++;
}
}
static void
zoom_out (gint *src,
gint *dest,
gint scale)
{
while (scale--)
{
if (*dest > 1)
(*dest)--;
else
if (*src < 0x10)
(*src)++;
}
}
/* magnify action functions */
static void
gimp_magnify_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp)
{
GimpMagnifyTool *magnify;
gint x, y;
magnify = GIMP_MAGNIFY_TOOL (tool);
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, TRUE, 0);
magnify->x = x;
magnify->y = y;
magnify->w = 0;
magnify->h = 0;
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
tool->state = ACTIVE;
tool->gdisp = gdisp;
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool),
gdisp->canvas->window);
}
static void
gimp_magnify_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp)
{
GimpMagnifyTool *magnify;
gint win_width, win_height;
gint width, height;
gint scalesrc, scaledest;
gint scale;
gint x1, y1, x2, y2, w, h;
magnify = GIMP_MAGNIFY_TOOL (tool);
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
tool->state = INACTIVE;
/* First take care of the case where the user "cancels" the action */
if (! (bevent->state & GDK_BUTTON3_MASK))
{
x1 = (magnify->w < 0) ? magnify->x + magnify->w : magnify->x;
y1 = (magnify->h < 0) ? magnify->y + magnify->h : magnify->y;
w = (magnify->w < 0) ? -magnify->w : magnify->w;
h = (magnify->h < 0) ? -magnify->h : magnify->h;
x2 = x1 + w;
y2 = y1 + h;
/* these change the user zoom level, so should not be changed to
* the resolution-aware scale macros -- austin */
scalesrc = SCALESRC (gdisp);
scaledest = SCALEDEST (gdisp);
win_width = gdisp->disp_width;
win_height = gdisp->disp_height;
width = (win_width * scalesrc) / scaledest;
height = (win_height * scalesrc) / scaledest;
if (!w || !h)
scale = 1;
else
scale = MIN ((width / w), (height / h));
magnify->op = magnify_options->type;
switch (magnify->op)
{
case GIMP_ZOOM_IN:
zoom_in (&scalesrc, &scaledest, scale);
break;
case GIMP_ZOOM_OUT:
zoom_out (&scalesrc, &scaledest, scale);
break;
}
gdisp->scale = (scaledest << 8) + scalesrc;
gdisp->offset_x = (scaledest * ((x1 + x2) / 2)) / scalesrc -
(win_width / 2);
gdisp->offset_y = (scaledest * ((y1 + y2) / 2)) / scalesrc -
(win_height / 2);
/* resize the image */
resize_display (gdisp, gimprc.allow_resize_windows, TRUE);
}
}
static void
gimp_magnify_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp)
{
GimpMagnifyTool *magnify;
gint x, y;
if (tool->state != ACTIVE)
return;
magnify = GIMP_MAGNIFY_TOOL (tool);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, TRUE, 0);
magnify->w = (x - magnify->x);
magnify->h = (y - magnify->y);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_magnify_tool_modifier_key (GimpTool *tool,
GdkEventKey *kevent,
GDisplay *gdisp)
{
switch (kevent->keyval)
{
case GDK_Alt_L: case GDK_Alt_R:
break;
case GDK_Shift_L: case GDK_Shift_R:
break;
case GDK_Control_L: case GDK_Control_R:
if (magnify_options->type == GIMP_ZOOM_IN)
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (magnify_options->type_w[GIMP_ZOOM_OUT]), TRUE);
else
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (magnify_options->type_w[GIMP_ZOOM_IN]), TRUE);
break;
}
}
static void
gimp_magnify_tool_cursor_update (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp)
{
if (magnify_options->type == GIMP_ZOOM_IN)
{
gdisplay_install_tool_cursor (gdisp,
GIMP_ZOOM_CURSOR,
GIMP_ZOOM_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_PLUS);
}
else
{
gdisplay_install_tool_cursor (gdisp,
GIMP_ZOOM_CURSOR,
GIMP_ZOOM_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_MINUS);
}
}
static void
gimp_magnify_tool_draw (GimpDrawTool *draw_tool)
{
GimpMagnifyTool *magnify;
GimpTool *tool;
gint x1, y1, x2, y2;
magnify = GIMP_MAGNIFY_TOOL (draw_tool);
tool = GIMP_TOOL (draw_tool);
x1 = MIN (magnify->x, magnify->x + magnify->w);
y1 = MIN (magnify->y, magnify->y + magnify->h);
x2 = MAX (magnify->x, magnify->x + magnify->w);
y2 = MAX (magnify->y, magnify->y + magnify->h);
gdisplay_transform_coords (tool->gdisp, x1, y1, &x1, &y1, 0);
gdisplay_transform_coords (tool->gdisp, x2, y2, &x2, &y2, 0);
gdk_draw_rectangle (draw_tool->win, draw_tool->gc, 0,
x1, y1, (x2 - x1), (y2 - y1));
}
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