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gimp/libgimp/gimpentry.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <math.h>
#include "gimpentry.h"
#define SIZE_MAX_VALUE 500000.0 /* is that enough ?? */
#define NUM_UNITS 3
static float gse_unit_factor[] =
{
1.0,
1.0,
2.54
};
static gchar* gse_unit_string[] =
{
"px",
"in",
"cm"
};
static void gimp_size_entry_unit_callback (GtkWidget *widget, gpointer data);
static void gimp_size_entry_value_callback (GtkWidget *widget, gpointer data);
enum {
GSE_VALUE_CHANGED_SIGNAL,
GSE_UNIT_CHANGED_SIGNAL,
GSE_RESOLUTION_CHANGED_SIGNAL,
LAST_SIGNAL
};
static gint gimp_size_entry_signals[LAST_SIGNAL] = { 0 };
static void
gimp_size_entry_class_init (GimpSizeEntryClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*) class;
gimp_size_entry_signals[GSE_VALUE_CHANGED_SIGNAL] =
gtk_signal_new ("value_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpSizeEntryClass, gimp_size_entry),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gimp_size_entry_signals[GSE_UNIT_CHANGED_SIGNAL] =
gtk_signal_new ("unit_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpSizeEntryClass, gimp_size_entry),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gimp_size_entry_signals[GSE_RESOLUTION_CHANGED_SIGNAL] =
gtk_signal_new ("resolution_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpSizeEntryClass, gimp_size_entry),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, gimp_size_entry_signals,
LAST_SIGNAL);
class->gimp_size_entry = NULL;
}
static void
gimp_size_entry_init (GimpSizeEntry *gse)
{
GtkWidget *spinbutton;
GtkWidget *menu;
GtkWidget *menuitem;
GtkWidget *optionmenu;
GtkAdjustment *adj;
guint i;
adj = (GtkAdjustment *) gtk_adjustment_new (0.0, -SIZE_MAX_VALUE, SIZE_MAX_VALUE,
1.0, 50.0, 0.0);
spinbutton = gtk_spin_button_new (adj, 1.0, 0);
gtk_spin_button_set_shadow_type (GTK_SPIN_BUTTON(spinbutton), GTK_SHADOW_NONE);
gtk_widget_set_usize (spinbutton, 75, 0);
gtk_signal_connect (GTK_OBJECT (spinbutton), "changed",
(GtkSignalFunc) gimp_size_entry_value_callback, gse);
gtk_box_pack_start (GTK_BOX(gse), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
menu = gtk_menu_new();
for (i=0; i<NUM_UNITS; i++)
{
menuitem = gtk_menu_item_new_with_label (gse_unit_string[i]);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) gimp_size_entry_unit_callback, gse);
gtk_widget_show(menuitem);
gtk_object_set_data (GTK_OBJECT (menuitem), "gimp_size_entry_unit", (gpointer)i);
}
optionmenu = gtk_option_menu_new();
gtk_option_menu_set_menu (GTK_OPTION_MENU (optionmenu), menu);
gtk_box_pack_start (GTK_BOX(gse), optionmenu, FALSE, FALSE, 0);
gtk_widget_show(optionmenu);
gse->spinbutton = spinbutton;
gse->optionmenu = optionmenu;
gse->resolution = 72;
}
guint
gimp_size_entry_get_type ()
{
static guint gse_type = 0;
if (!gse_type)
{
GtkTypeInfo gse_info =
{
"GimpSizeEntry",
sizeof (GimpSizeEntry),
sizeof (GimpSizeEntryClass),
(GtkClassInitFunc) gimp_size_entry_class_init,
(GtkObjectInitFunc) gimp_size_entry_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
gse_type = gtk_type_unique (gtk_hbox_get_type (), &gse_info);
}
return gse_type;
}
GtkWidget*
gimp_size_entry_new (gfloat value,
GSizeUnit unit,
gfloat resolution,
guint positive_only)
{
GimpSizeEntry *gse;
float max;
GtkAdjustment *adj;
if (resolution <= 0.0)
return (NULL);
gse = gtk_type_new (gimp_size_entry_get_type ());
gse->resolution = resolution;
gse->positive_only = positive_only;
gtk_option_menu_set_history (GTK_OPTION_MENU (gse->optionmenu), unit);
if ((positive_only == TRUE) && (value <= 0.0))
value = 0.0;
if (unit != PIXELS)
{
max = SIZE_MAX_VALUE / gse->resolution * gse_unit_factor[unit];
adj = (GtkAdjustment *) gtk_adjustment_new (0.0,
((positive_only ==TRUE) ? 0.0 : -max),
max, 0.1, 5.0, 0.0);
gtk_spin_button_configure (GTK_SPIN_BUTTON (gse->spinbutton), adj, 0.01, 2);
}
else
{
if (positive_only == TRUE)
{
adj = (GtkAdjustment *) gtk_adjustment_new (0.0, 0, SIZE_MAX_VALUE,
1.0, 50.0, 0.0);
gtk_spin_button_configure (GTK_SPIN_BUTTON (gse->spinbutton), adj, 1.0, 0);
}
}
gtk_spin_button_set_value (GTK_SPIN_BUTTON (gse->spinbutton), value);
return GTK_WIDGET (gse);
}
void
gimp_size_entry_set_value (GimpSizeEntry *gse,
gfloat value)
{
gtk_spin_button_set_value (GTK_SPIN_BUTTON (gse->spinbutton), value);
}
void
gimp_size_entry_set_value_as_pixels (GimpSizeEntry *gse,
gint pixels)
{
gfloat value;
if (gse->unit == PIXELS)
value = (float)pixels;
else
value = (float)pixels / gse->resolution * gse_unit_factor[gse->unit];
gtk_spin_button_set_value (GTK_SPIN_BUTTON (gse->spinbutton), value);
}
gfloat
gimp_size_entry_get_value (GimpSizeEntry *gse)
{
return (gtk_spin_button_get_value_as_float (GTK_SPIN_BUTTON (gse->spinbutton)));
}
gint
gimp_size_entry_get_value_as_pixels (GimpSizeEntry *gse)
{
gfloat value;
value = gtk_spin_button_get_value_as_float (GTK_SPIN_BUTTON (gse->spinbutton));
if (gse->unit != PIXELS)
value = value * gse->resolution / gse_unit_factor[gse->unit];
if (value - floor (value) < ceil (value) - value)
return floor (value);
else
return ceil (value);
}
void
gimp_size_entry_set_unit (GimpSizeEntry *gse,
GSizeUnit new_unit)
{
gfloat value;
gfloat max;
GtkAdjustment *adj;
if (new_unit >= NUM_UNITS)
new_unit = PIXELS;
if (new_unit == gse->unit) return;
value = gtk_spin_button_get_value_as_float (GTK_SPIN_BUTTON (gse->spinbutton));
gtk_signal_handler_block_by_data (GTK_OBJECT(gse->spinbutton), gse);
if (new_unit == PIXELS)
{
max = SIZE_MAX_VALUE;
adj = (GtkAdjustment *)gtk_adjustment_new (0.0,
((gse->positive_only == TRUE) ? 0.0 : -max),
max, 0.1, 5.0, 0.0);
gtk_spin_button_configure (GTK_SPIN_BUTTON (gse->spinbutton), adj, 1.0, 0);
value = value * gse->resolution / gse_unit_factor[gse->unit];
}
else
{
max = SIZE_MAX_VALUE / gse->resolution * gse_unit_factor[new_unit];
adj = (GtkAdjustment *)gtk_adjustment_new (0.0,
((gse->positive_only == TRUE) ? 0.0 : -max),
max, 0.1, 5.0, 0.0);
gtk_spin_button_configure (GTK_SPIN_BUTTON (gse->spinbutton), adj, 0.01, 2);
value = value * gse_unit_factor[new_unit] / gse_unit_factor[gse->unit];
if (gse->unit == PIXELS)
value = value / gse->resolution;
}
gtk_spin_button_set_value (GTK_SPIN_BUTTON (gse->spinbutton), value);
gtk_signal_handler_unblock_by_data (GTK_OBJECT(gse->spinbutton), gse);
gtk_option_menu_set_history (GTK_OPTION_MENU (gse->optionmenu), new_unit);
gse->unit = new_unit;
}
GSizeUnit
gimp_size_entry_get_unit (GimpSizeEntry *gse)
{
return (gse->unit);
}
void
gimp_size_entry_set_resolution (GimpSizeEntry *gse,
gfloat resolution)
{
if (resolution <= 0.0)
return;
/* This function does NOT change the value of the size_entry
for you! You have to take care of that yourself. */
gse->resolution = resolution;
gtk_signal_emit (GTK_OBJECT (gse), gimp_size_entry_signals[GSE_RESOLUTION_CHANGED_SIGNAL]);
}
static void
gimp_size_entry_unit_callback (GtkWidget *widget,
gpointer data)
{
GimpSizeEntry *gse;
guint new_unit;
gse = data;
new_unit = (guint) gtk_object_get_data (GTK_OBJECT (widget), "gimp_size_entry_unit");
if (gse->unit == new_unit)
return;
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY(gse), new_unit);
gtk_signal_emit (GTK_OBJECT (gse), gimp_size_entry_signals[GSE_UNIT_CHANGED_SIGNAL]);
}
static void
gimp_size_entry_value_callback (GtkWidget *widget,
gpointer data)
{
GimpSizeEntry *gse;
gse = data;
gtk_signal_emit (GTK_OBJECT (gse), gimp_size_entry_signals[GSE_VALUE_CHANGED_SIGNAL]);
}
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