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gimp/app/dialogs/resolution-calibrate-dialog.c

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/* GIMP - The GNU 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 <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "resolution-calibrate-dialog.h"
#include "gimp-intl.h"
static GtkWidget *calibrate_entry = NULL;
static gdouble calibrate_xres = 1.0;
static gdouble calibrate_yres = 1.0;
static gint ruler_width = 1;
static gint ruler_height = 1;
/**
* resolution_calibrate_dialog:
* @resolution_entry: a #GimpSizeEntry to connect the dialog to
* @pixbuf: an optional #GdkPixbuf for the upper left corner
*
* Displays a dialog that allows the user to interactively determine
* her monitor resolution. This dialog runs it's own GTK main loop and
* is connected to a #GimpSizeEntry handling the resolution to be set.
**/
void
resolution_calibrate_dialog (GtkWidget *resolution_entry,
GdkPixbuf *pixbuf)
{
GtkWidget *dialog;
GtkWidget *table;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *ruler;
GtkWidget *label;
GdkScreen *screen;
GdkRectangle rect;
gint monitor;
g_return_if_fail (GIMP_IS_SIZE_ENTRY (resolution_entry));
g_return_if_fail (GTK_WIDGET_REALIZED (resolution_entry));
g_return_if_fail (pixbuf == NULL || GDK_IS_PIXBUF (pixbuf));
/* this dialog can only exist once */
if (calibrate_entry)
return;
dialog = gimp_dialog_new (_("Calibrate Monitor Resolution"),
"gimp-resolution-calibration",
gtk_widget_get_toplevel (resolution_entry),
GTK_DIALOG_DESTROY_WITH_PARENT,
NULL, NULL,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
screen = gtk_widget_get_screen (dialog);
monitor = gdk_screen_get_monitor_at_window (screen,
resolution_entry->window);
gdk_screen_get_monitor_geometry (screen, monitor, &rect);
ruler_width = rect.width - 300 - (rect.width % 100);
ruler_height = rect.height - 300 - (rect.height % 100);
table = gtk_table_new (4, 4, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (table), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), table);
gtk_widget_show (table);
if (pixbuf)
{
GtkWidget *image = gtk_image_new_from_pixbuf (pixbuf);
gtk_table_attach (GTK_TABLE (table), image, 0, 1, 0, 1,
GTK_SHRINK, GTK_SHRINK, 4, 4);
gtk_widget_show (image);
}
ruler = gtk_hruler_new ();
gtk_widget_set_size_request (ruler, ruler_width, 32);
gtk_ruler_set_range (GTK_RULER (ruler), 0, ruler_width, 0, ruler_width);
gtk_table_attach (GTK_TABLE (table), ruler, 1, 3, 0, 1,
GTK_SHRINK, GTK_SHRINK, 0, 0);
gtk_widget_show (ruler);
ruler = gtk_vruler_new ();
gtk_widget_set_size_request (ruler, 32, ruler_height);
gtk_ruler_set_range (GTK_RULER (ruler), 0, ruler_height, 0, ruler_height);
gtk_table_attach (GTK_TABLE (table), ruler, 0, 1, 1, 3,
GTK_SHRINK, GTK_SHRINK, 0, 0);
gtk_widget_show (ruler);
vbox = gtk_vbox_new (FALSE, 12);
gtk_table_attach (GTK_TABLE (table), vbox, 1, 2, 1, 2,
GTK_SHRINK, GTK_SHRINK, 0, 0);
gtk_widget_show (vbox);
label =
gtk_label_new (_("Measure the rulers and enter their lengths:"));
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_SCALE, PANGO_SCALE_LARGE,
PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
-1);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
hbox = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
calibrate_xres =
gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (resolution_entry), 0);
calibrate_yres =
gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (resolution_entry), 1);
calibrate_entry =
gimp_coordinates_new (GIMP_UNIT_INCH, "%p",
FALSE, FALSE, 10,
GIMP_SIZE_ENTRY_UPDATE_SIZE,
FALSE,
FALSE,
_("_Horizontal:"),
ruler_width,
calibrate_xres,
1, GIMP_MAX_IMAGE_SIZE,
0, 0,
_("_Vertical:"),
ruler_height,
calibrate_yres,
1, GIMP_MAX_IMAGE_SIZE,
0, 0);
gtk_widget_hide (GTK_WIDGET (GIMP_COORDINATES_CHAINBUTTON (calibrate_entry)));
g_signal_connect (dialog, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&calibrate_entry);
gtk_box_pack_end (GTK_BOX (hbox), calibrate_entry, FALSE, FALSE, 0);
gtk_widget_show (calibrate_entry);
gtk_widget_show (dialog);
switch (gimp_dialog_run (GIMP_DIALOG (dialog)))
{
case GTK_RESPONSE_OK:
{
GtkWidget *chain_button;
gdouble x, y;
x = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (calibrate_entry), 0);
y = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (calibrate_entry), 1);
calibrate_xres = (gdouble) ruler_width * calibrate_xres / x;
calibrate_yres = (gdouble) ruler_height * calibrate_yres / y;
chain_button = GIMP_COORDINATES_CHAINBUTTON (resolution_entry);
if (ABS (x - y) > GIMP_MIN_RESOLUTION)
gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain_button),
FALSE);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (resolution_entry),
0, calibrate_xres);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (resolution_entry),
1, calibrate_yres);
}
default:
break;
}
gtk_widget_destroy (dialog);
}
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