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gimp/libgimp/gimpsizeentry.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpsizeentry.c
* Copyright (C) 1999-2000 Sven Neumann <sven@gimp.org>
* Michael Natterer <mitch@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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 Lesser 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 <gtk/gtk.h>
#include "gimplimits.h"
#include "gimpsizeentry.h"
#include "gimpunitmenu.h"
#define SIZE_MAX_VALUE 500000.0
#define GIMP_SIZE_ENTRY_DIGITS(unit) (MIN (gimp_unit_get_digits (unit), 5) + 1)
enum
{
VALUE_CHANGED,
REFVAL_CHANGED,
UNIT_CHANGED,
LAST_SIGNAL
};
struct _GimpSizeEntryField
{
GimpSizeEntry *gse;
gdouble resolution;
gdouble lower;
gdouble upper;
GtkObject *value_adjustment;
GtkWidget *value_spinbutton;
gdouble value;
gdouble min_value;
gdouble max_value;
GtkObject *refval_adjustment;
GtkWidget *refval_spinbutton;
gdouble refval;
gdouble min_refval;
gdouble max_refval;
gint refval_digits;
gint stop_recursion;
};
static void gimp_size_entry_destroy (GtkObject *object);
static void gimp_size_entry_class_init (GimpSizeEntryClass *class);
static void gimp_size_entry_init (GimpSizeEntry *gse);
static void gimp_size_entry_update_value (GimpSizeEntryField *gsef,
gdouble value);
static void gimp_size_entry_value_callback (GtkWidget *widget,
gpointer data);
static void gimp_size_entry_update_refval (GimpSizeEntryField *gsef,
gdouble refval);
static void gimp_size_entry_refval_callback (GtkWidget *widget,
gpointer data);
static void gimp_size_entry_update_unit (GimpSizeEntry *gse,
GimpUnit unit);
static void gimp_size_entry_unit_callback (GtkWidget *widget,
gpointer data);
static guint gimp_size_entry_signals[LAST_SIGNAL] = { 0 };
static GtkTableClass *parent_class = NULL;
static void
gimp_size_entry_destroy (GtkObject *object)
{
GimpSizeEntry *gse;
GSList *list;
g_return_if_fail (object != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (object));
gse = GIMP_SIZE_ENTRY (object);
for (list = gse->fields; list; list = g_slist_next(list))
g_free (list->data);
g_slist_free (gse->fields);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gimp_size_entry_class_init (GimpSizeEntryClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*) class;
parent_class = gtk_type_class (gtk_table_get_type ());
gimp_size_entry_signals[VALUE_CHANGED] =
gtk_signal_new ("value_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpSizeEntryClass,
value_changed),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gimp_size_entry_signals[REFVAL_CHANGED] =
gtk_signal_new ("refval_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpSizeEntryClass,
refval_changed),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gimp_size_entry_signals[UNIT_CHANGED] =
gtk_signal_new ("unit_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpSizeEntryClass,
unit_changed),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, gimp_size_entry_signals,
LAST_SIGNAL);
class->value_changed = NULL;
class->refval_changed = NULL;
class->unit_changed = NULL;
object_class->destroy = gimp_size_entry_destroy;
}
static void
gimp_size_entry_init (GimpSizeEntry *gse)
{
gse->fields = NULL;
gse->number_of_fields = 0;
gse->unitmenu = NULL;
gse->unit = GIMP_UNIT_PIXEL;
gse->menu_show_pixels = TRUE;
gse->menu_show_percent = TRUE;
gse->show_refval = FALSE;
gse->update_policy = GIMP_SIZE_ENTRY_UPDATE_NONE;
}
GtkType
gimp_size_entry_get_type (void)
{
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_table_get_type (), &gse_info);
}
return gse_type;
}
/**
* gimp_size_entry_new:
* @number_of_fields: The number of input fields.
* @unit: The initial unit.
* @unit_format: A printf-like unit-format string (see #GimpUnitMenu).
* @menu_show_pixels: #TRUE if the unit menu shold contain an item for
* GIMP_UNIT_PIXEL (ignored if the @update_policy is not
* GIMP_SIZE_ENTRY_UPDATE_NONE).
* @menu_show_percent: #TRUE if the unit menu shold contain an item for
* GIMP_UNIT_PERCENT.
* @show_refval: #TRUE if you want an extra "refenence value" spinbutton per
input field.
* @spinbutton_usize: The minimal horizontal size of the #GtkSpinButton's.
* @update_policy: How the automatic pixel <-> real-world-unit calculations
* should be performed.
*
* Creates a new #GimpSizeEntry widget.
*
* To have all automatic calculations performed correctly, set up the
* widget in the following order:
*
* 1. gimp_size_entry_new()
*
* 2. (for each additional input field) gimp_size_entry_add_field()
*
* 3. gimp_size_entry_set_unit()
*
* For each input field:
*
* 4. gimp_size_entry_set_resolution()
*
* 5. gimp_size_entry_set_refval_boundaries()
* (or gimp_size_entry_set_value_boundaries())
*
* 6. gimp_size_entry_set_size()
*
* 7. gimp_size_entry_set_refval() (or gimp_size_entry_set_value())
*
* The #GimpSizeEntry is derived from #GtkTable and will have
* an empty border of one cell width on each side plus an empty column left
* of the #GimpUnitMenu to allow the caller to add labels or a #GimpChainButton.
*
* Returns: A Pointer to the new #GimpSizeEntry widget.
*
*/
GtkWidget *
gimp_size_entry_new (gint number_of_fields,
GimpUnit unit,
const gchar *unit_format,
gboolean menu_show_pixels,
gboolean menu_show_percent,
gboolean show_refval,
gint spinbutton_usize,
GimpSizeEntryUpdatePolicy update_policy)
{
GimpSizeEntry *gse;
gint i;
g_return_val_if_fail ((number_of_fields >= 0) && (number_of_fields <= 16),
NULL);
gse = gtk_type_new (GIMP_TYPE_SIZE_ENTRY);
gse->number_of_fields = number_of_fields;
gse->unit = unit;
gse->show_refval = show_refval;
gse->update_policy = update_policy;
gtk_table_resize (GTK_TABLE (gse),
1 + gse->show_refval + 2,
number_of_fields + 1 + 3);
/* show the 'pixels' menu entry only if we are a 'size' sizeentry and
* don't have the reference value spinbutton
*/
if ((update_policy == GIMP_SIZE_ENTRY_UPDATE_RESOLUTION) ||
(show_refval == TRUE))
gse->menu_show_pixels = FALSE;
else
gse->menu_show_pixels = menu_show_pixels;
/* show the 'percent' menu entry only if we are a 'size' sizeentry
*/
if (update_policy == GIMP_SIZE_ENTRY_UPDATE_RESOLUTION)
gse->menu_show_percent = FALSE;
else
gse->menu_show_percent = menu_show_percent;
for (i = 0; i < number_of_fields; i++)
{
GimpSizeEntryField *gsef;
gsef = g_new0 (GimpSizeEntryField, 1);
gse->fields = g_slist_append (gse->fields, gsef);
gsef->gse = gse;
gsef->resolution = 1.0; /* just to avoid division by zero */
gsef->lower = 0.0;
gsef->upper = 100.0;
gsef->value = 0;
gsef->min_value = 0;
gsef->max_value = SIZE_MAX_VALUE;
gsef->refval_adjustment = NULL;
gsef->value_adjustment = NULL;
gsef->refval = 0;
gsef->min_refval = 0;
gsef->max_refval = SIZE_MAX_VALUE;
gsef->refval_digits =
(update_policy == GIMP_SIZE_ENTRY_UPDATE_SIZE) ? 0 : 3;
gsef->stop_recursion = 0;
gsef->value_adjustment = gtk_adjustment_new (gsef->value,
gsef->min_value,
gsef->max_value,
1.0, 10.0, 0.0);
gsef->value_spinbutton =
gtk_spin_button_new (GTK_ADJUSTMENT (gsef->value_adjustment), 1.0,
(unit == GIMP_UNIT_PIXEL) ? gsef->refval_digits :
(unit == GIMP_UNIT_PERCENT) ? 2 :
GIMP_SIZE_ENTRY_DIGITS (unit));
gtk_spin_button_set_shadow_type (GTK_SPIN_BUTTON(gsef->value_spinbutton),
GTK_SHADOW_NONE);
gtk_widget_set_usize (gsef->value_spinbutton, spinbutton_usize, 0);
gtk_table_attach_defaults (GTK_TABLE (gse), gsef->value_spinbutton,
i+1, i+2,
gse->show_refval+1, gse->show_refval+2);
gtk_signal_connect (GTK_OBJECT (gsef->value_adjustment), "value_changed",
GTK_SIGNAL_FUNC (gimp_size_entry_value_callback),
gsef);
gtk_widget_show (gsef->value_spinbutton);
if (gse->show_refval)
{
gsef->refval_adjustment = gtk_adjustment_new (gsef->refval,
gsef->min_refval,
gsef->max_refval,
1.0, 10.0, 0.0);
gsef->refval_spinbutton =
gtk_spin_button_new (GTK_ADJUSTMENT (gsef->refval_adjustment),
1.0,
gsef->refval_digits);
gtk_spin_button_set_shadow_type (GTK_SPIN_BUTTON (gsef->refval_spinbutton),
GTK_SHADOW_NONE);
gtk_widget_set_usize (gsef->refval_spinbutton, spinbutton_usize, 0);
gtk_table_attach_defaults (GTK_TABLE (gse), gsef->refval_spinbutton,
i + 1, i + 2, 1, 2);
gtk_signal_connect (GTK_OBJECT (gsef->refval_adjustment),
"value_changed",
GTK_SIGNAL_FUNC (gimp_size_entry_refval_callback),
gsef);
gtk_widget_show (gsef->refval_spinbutton);
}
if (gse->menu_show_pixels && !gse->show_refval && (unit == GIMP_UNIT_PIXEL))
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
gsef->refval_digits);
}
gse->unitmenu = gimp_unit_menu_new (unit_format, unit,
gse->menu_show_pixels,
gse->menu_show_percent, TRUE);
gtk_table_attach (GTK_TABLE (gse), gse->unitmenu,
i+2, i+3,
gse->show_refval+1, gse->show_refval+2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_signal_connect (GTK_OBJECT (gse->unitmenu), "unit_changed",
GTK_SIGNAL_FUNC (gimp_size_entry_unit_callback),
gse);
gtk_widget_show (gse->unitmenu);
return GTK_WIDGET (gse);
}
/**
* gimp_size_entry_add_field:
* @gse: The sizeentry you want to add a field to.
* @value_spinbutton: The spinbutton to display the field's value.
* @refval_spinbutton: The spinbutton to display the field's reference value.
*
* Adds an input field to the #GimpSizeEntry.
*
* The new input field will have the index 0. If you specified @show_refval
* as #TRUE in gimp_size_entry_new() you have to pass an additional
* #GtkSpinButton to hold the reference value. If @show_refval was #FALSE,
* @refval_spinbutton will be ignored.
*
*/
void
gimp_size_entry_add_field (GimpSizeEntry *gse,
GtkSpinButton *value_spinbutton,
GtkSpinButton *refval_spinbutton)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail (value_spinbutton != NULL);
g_return_if_fail (GTK_IS_SPIN_BUTTON (value_spinbutton));
if (gse->show_refval)
{
g_return_if_fail (refval_spinbutton != NULL);
g_return_if_fail (GTK_IS_SPIN_BUTTON (refval_spinbutton));
}
gsef = g_new0 (GimpSizeEntryField, 1);
gse->fields = g_slist_prepend (gse->fields, gsef);
gse->number_of_fields++;
gsef->gse = gse;
gsef->resolution = 1.0; /* just to avoid division by zero */
gsef->lower = 0.0;
gsef->upper = 100.0;
gsef->value = 0;
gsef->min_value = 0;
gsef->max_value = SIZE_MAX_VALUE;
gsef->refval = 0;
gsef->min_refval = 0;
gsef->max_refval = SIZE_MAX_VALUE;
gsef->refval_digits =
(gse->update_policy == GIMP_SIZE_ENTRY_UPDATE_SIZE) ? 0 : 3;
gsef->stop_recursion = 0;
gsef->value_adjustment =
GTK_OBJECT (gtk_spin_button_get_adjustment (value_spinbutton));
gsef->value_spinbutton = GTK_WIDGET (value_spinbutton);
gtk_signal_connect (GTK_OBJECT (gsef->value_adjustment), "value_changed",
GTK_SIGNAL_FUNC (gimp_size_entry_value_callback),
gsef);
if (gse->show_refval)
{
gsef->refval_adjustment =
GTK_OBJECT (gtk_spin_button_get_adjustment (refval_spinbutton));
gsef->refval_spinbutton = GTK_WIDGET (refval_spinbutton);
gtk_signal_connect (GTK_OBJECT (gsef->refval_adjustment), "value_changed",
GTK_SIGNAL_FUNC (gimp_size_entry_refval_callback),
gsef);
}
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (value_spinbutton),
(gse->unit == GIMP_UNIT_PIXEL) ? gsef->refval_digits :
(gse->unit == GIMP_UNIT_PERCENT) ? 2 :
GIMP_SIZE_ENTRY_DIGITS (gse->unit));
if (gse->menu_show_pixels &&
!gse->show_refval &&
(gse->unit == GIMP_UNIT_PIXEL))
{
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
gsef->refval_digits);
}
}
/**
* gimp_size_entry_attach_label:
* @gse: The sizeentry you want to add a label to.
* @text: The text of the label.
* @row: The row where the label will be attached.
* @column: The column where the label will be attached.
* @alignment: The horizontal alignment of the label.
*
* Attaches a #GtkLabel to the #GimpSizeEntry (which is a #GtkTable).
*/
void
gimp_size_entry_attach_label (GimpSizeEntry *gse,
const gchar *text,
gint row,
gint column,
gfloat alignment)
{
GtkWidget* label;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
label = gtk_label_new (text);
gtk_misc_set_alignment (GTK_MISC (label), alignment, 0.5);
gtk_table_attach (GTK_TABLE (gse), label, column, column+1, row, row+1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
}
/**
* gimp_size_entry_set_resolution:
* @gse: The sizeentry you want to set a resolution for.
* @field: The index of the field you want to set the resolution for.
* @resolution: The new resolution (in dpi) for the chosen @field.
* @keep_size: #TRUE if the @field's size in pixels should stay the same.
* #FALSE if the @field's size in units should stay the same.
*
* Sets the resolution (in dpi) for field # @field of the #GimpSizeEntry.
*
* The @resolution passed will be clamped to fit in
* [#GIMP_MIN_RESOLUTION..#GIMP_MAX_RESOLUTION].
*
* This function does nothing if the #GimpSizeEntryUpdatePolicy specified in
* gimp_size_entry_new() doesn't equal to GIMP_SIZE_ENTRY_UPDATE_SIZE.
*
*/
void
gimp_size_entry_set_resolution (GimpSizeEntry *gse,
gint field,
gdouble resolution,
gboolean keep_size)
{
GimpSizeEntryField *gsef;
gfloat val;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
resolution = CLAMP (resolution, GIMP_MIN_RESOLUTION, GIMP_MAX_RESOLUTION);
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
gsef->resolution = resolution;
val = gsef->value;
gsef->stop_recursion = 0;
gimp_size_entry_set_refval_boundaries (gse, field,
gsef->min_refval, gsef->max_refval);
if (! keep_size)
gimp_size_entry_set_value (gse, field, val);
}
/**
* gimp_size_entry_set_size:
* @gse: The sizeentry you want to set a size for.
* @field: The index of the field you want to set the size for.
* @lower: The reference value which will be treated as 0%.
* @upper: The reference value which will be treated as 100%.
*
* Sets the pixel values for field # @field of the #GimpSizeEntry
* which will be treated as 0% and 100%.
*
* These values will be used if you specified @menu_show_percent as #TRUE
* in gimp_size_entry_new() and the user has selected GIMP_UNIT_PERCENT in
* the #GimpSizeEntry's #GimpUnitMenu.
*
* This function does nothing if the #GimpSizeEntryUpdatePolicy specified in
* gimp_size_entry_new() doesn't equal to GIMP_SIZE_ENTRY_UPDATE_SIZE.
*
*/
void
gimp_size_entry_set_size (GimpSizeEntry *gse,
gint field,
gdouble lower,
gdouble upper)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
g_return_if_fail (lower <= upper);
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
gsef->lower = lower;
gsef->upper = upper;
gimp_size_entry_set_refval (gse, field, gsef->refval);
}
/**
* gimp_size_entry_set_value_boundaries:
* @gse: The sizeentry you want to set value boundaries for.
* @field: The index of the field you want to set value boundaries for.
* @lower: The new lower boundary of the value of the chosen @field.
* @upper: The new upper boundary of the value of the chosen @field.
*
* Limits the range of possible values which can be entered in field # @field
* of the #GimpSizeEntry.
*
* The current value of the @field will be clamped to fit in the @field's
* new boundaries.
*
* NOTE: In most cases you won't be interested in these values because the
* #GimpSizeEntry's purpose is to shield the programmer from unit
* calculations. Use gimp_size_entry_set_refval_boundaries() instead.
*
*/
void
gimp_size_entry_set_value_boundaries (GimpSizeEntry *gse,
gint field,
gdouble lower,
gdouble upper)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
g_return_if_fail (lower <= upper);
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
gsef->min_value = lower;
gsef->max_value = upper;
GTK_ADJUSTMENT (gsef->value_adjustment)->lower = gsef->min_value;
GTK_ADJUSTMENT (gsef->value_adjustment)->upper = gsef->max_value;
if (gsef->stop_recursion) /* this is a hack (but useful ;-) */
return;
gsef->stop_recursion++;
switch (gsef->gse->update_policy)
{
case GIMP_SIZE_ENTRY_UPDATE_NONE:
break;
case GIMP_SIZE_ENTRY_UPDATE_SIZE:
switch (gse->unit)
{
case GIMP_UNIT_PIXEL:
gimp_size_entry_set_refval_boundaries (gse, field,
gsef->min_value,
gsef->max_value);
break;
case GIMP_UNIT_PERCENT:
gimp_size_entry_set_refval_boundaries (gse, field,
gsef->lower +
(gsef->upper - gsef->lower) *
gsef->min_value / 100,
gsef->lower +
(gsef->upper - gsef->lower) *
gsef->max_value / 100);
break;
default:
gimp_size_entry_set_refval_boundaries (gse, field,
gsef->min_value *
gsef->resolution /
gimp_unit_get_factor (gse->unit),
gsef->max_value *
gsef->resolution /
gimp_unit_get_factor (gse->unit));
break;
}
break;
case GIMP_SIZE_ENTRY_UPDATE_RESOLUTION:
gimp_size_entry_set_refval_boundaries (gse, field,
gsef->min_value *
gimp_unit_get_factor (gse->unit),
gsef->max_value *
gimp_unit_get_factor (gse->unit));
break;
default:
break;
}
gsef->stop_recursion--;
gimp_size_entry_set_value (gse, field, gsef->value);
}
/**
* gimp_size_entry_get_value;
* @gse: The sizeentry you want to know a value of.
* @field: The index of the filed you want to know the value of.
*
* Returns the value of field # @field of the #GimpSizeEntry.
*
* The @value returned is a distance or resolution
* in the #GimpUnit the user has selected in the #GimpSizeEntry's
* #GimpUnitMenu.
*
* NOTE: In most cases you won't be interested in this value because the
* #GimpSizeEntry's purpose is to shield the programmer from unit
* calculations. Use gimp_size_entry_get_refval() instead.
*
* Returns: The value of the chosen @field.
*
*/
gdouble
gimp_size_entry_get_value (GimpSizeEntry *gse,
gint field)
{
GimpSizeEntryField *gsef;
g_return_val_if_fail (gse != NULL, 0);
g_return_val_if_fail (GIMP_IS_SIZE_ENTRY (gse), 0);
g_return_val_if_fail ((field >= 0) && (field < gse->number_of_fields), 0);
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
return gsef->value;
}
static void
gimp_size_entry_update_value (GimpSizeEntryField *gsef,
gdouble value)
{
if (gsef->stop_recursion > 1)
return;
gsef->value = value;
switch (gsef->gse->update_policy)
{
case GIMP_SIZE_ENTRY_UPDATE_NONE:
break;
case GIMP_SIZE_ENTRY_UPDATE_SIZE:
switch (gsef->gse->unit)
{
case GIMP_UNIT_PIXEL:
gsef->refval = value;
break;
case GIMP_UNIT_PERCENT:
gsef->refval =
CLAMP (gsef->lower + (gsef->upper - gsef->lower) * value / 100,
gsef->min_refval, gsef->max_refval);
break;
default:
gsef->refval =
CLAMP (value * gsef->resolution /
gimp_unit_get_factor (gsef->gse->unit),
gsef->min_refval, gsef->max_refval);
break;
}
if (gsef->gse->show_refval)
gtk_adjustment_set_value (GTK_ADJUSTMENT (gsef->refval_adjustment),
gsef->refval);
break;
case GIMP_SIZE_ENTRY_UPDATE_RESOLUTION:
gsef->refval =
CLAMP (value * gimp_unit_get_factor (gsef->gse->unit),
gsef->min_refval, gsef->max_refval);
if (gsef->gse->show_refval)
gtk_adjustment_set_value (GTK_ADJUSTMENT (gsef->refval_adjustment),
gsef->refval);
break;
default:
break;
}
}
/**
* gimp_size_entry_set_value;
* @gse: The sizeentry you want to set a value for.
* @field: The index of the field you want to set a value for.
* @value: The new value for @field.
*
* Sets the value for field # @field of the #GimpSizeEntry.
*
* The @value passed is treated to be a distance or resolution
* in the #GimpUnit the user has selected in the #GimpSizeEntry's
* #GimpUnitMenu.
*
* NOTE: In most cases you won't be interested in this value because the
* #GimpSizeEntry's purpose is to shield the programmer from unit
* calculations. Use gimp_size_entry_set_refval() instead.
*
*/
void
gimp_size_entry_set_value (GimpSizeEntry *gse,
gint field,
gdouble value)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
value = CLAMP (value, gsef->min_value, gsef->max_value);
gtk_adjustment_set_value (GTK_ADJUSTMENT (gsef->value_adjustment), value);
gimp_size_entry_update_value (gsef, value);
}
static void
gimp_size_entry_value_callback (GtkWidget *widget,
gpointer data)
{
GimpSizeEntryField *gsef;
gdouble new_value;
gsef = (GimpSizeEntryField*) data;
new_value = GTK_ADJUSTMENT (widget)->value;
if (gsef->value != new_value)
{
gimp_size_entry_update_value (gsef, new_value);
gtk_signal_emit (GTK_OBJECT (gsef->gse),
gimp_size_entry_signals[VALUE_CHANGED]);
}
}
/**
* gimp_size_entry_set_refval_boundaries:
* @gse: The sizeentry you want to set the reference value boundaries for.
* @field: The index of the field you want to set the reference value
* boundaries for.
* @lower: The new lower boundary of the reference value of the chosen @field.
* @upper: The new upper boundary of the reference value of the chosen @field.
*
* Limits the range of possible reference values which can be entered in
* field # @field of the #GimpSizeEntry.
*
* The current reference value of the @field will be clamped to fit in the
* @field's new boundaries.
*
*/
void
gimp_size_entry_set_refval_boundaries (GimpSizeEntry *gse,
gint field,
gdouble lower,
gdouble upper)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
g_return_if_fail (lower <= upper);
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
gsef->min_refval = lower;
gsef->max_refval = upper;
if (gse->show_refval)
{
GTK_ADJUSTMENT (gsef->refval_adjustment)->lower = gsef->min_refval;
GTK_ADJUSTMENT (gsef->refval_adjustment)->upper = gsef->max_refval;
}
if (gsef->stop_recursion) /* this is a hack (but useful ;-) */
return;
gsef->stop_recursion++;
switch (gsef->gse->update_policy)
{
case GIMP_SIZE_ENTRY_UPDATE_NONE:
break;
case GIMP_SIZE_ENTRY_UPDATE_SIZE:
switch (gse->unit)
{
case GIMP_UNIT_PIXEL:
gimp_size_entry_set_value_boundaries (gse, field,
gsef->min_refval,
gsef->max_refval);
break;
case GIMP_UNIT_PERCENT:
gimp_size_entry_set_value_boundaries (gse, field,
100 * (gsef->min_refval -
gsef->lower) /
(gsef->upper - gsef->lower),
100 * (gsef->max_refval -
gsef->lower) /
(gsef->upper - gsef->lower));
break;
default:
gimp_size_entry_set_value_boundaries (gse, field,
gsef->min_refval *
gimp_unit_get_factor(gse->unit) /
gsef->resolution,
gsef->max_refval *
gimp_unit_get_factor(gse->unit) /
gsef->resolution);
break;
}
break;
case GIMP_SIZE_ENTRY_UPDATE_RESOLUTION:
gimp_size_entry_set_value_boundaries (gse, field,
gsef->min_refval /
gimp_unit_get_factor (gse->unit),
gsef->max_refval /
gimp_unit_get_factor (gse->unit));
break;
default:
break;
}
gsef->stop_recursion--;
gimp_size_entry_set_refval (gse, field, gsef->refval);
}
/**
* gimp_size_entry_set_refval_digits:
* @gse: The sizeentry you want to set the reference value digits for.
* @field: The index of the field you want to set the reference value for.
* @digits: The new number of decimal digits for the #GtkSpinButton which
* displays @field's reference value.
*
* Sets the decimal digits of field # @field of the #GimpSizeEntry to
* @digits.
*
* If you don't specify this value explicitly, the reference value's number
* of digits will equal to 0 for GIMP_SIZE_ENTRY_UPDATE_SIZE and to 2 for
* GIMP_SIZE_ENTRY_UPDATE_RESOLUTION.
*
*/
void
gimp_size_entry_set_refval_digits (GimpSizeEntry *gse,
gint field,
gint digits)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
g_return_if_fail ((digits >= 0) && (digits <= 6));
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
gsef->refval_digits = digits;
if (gse->update_policy == GIMP_SIZE_ENTRY_UPDATE_SIZE)
{
if (gse->show_refval)
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->refval_spinbutton),
gsef->refval_digits);
else if (gse->unit == GIMP_UNIT_PIXEL)
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
gsef->refval_digits);
}
}
/**
* gimp_size_entry_get_refval;
* @gse: The sizeentry you want to know a reference value of.
* @field: The index of the field you want to know the reference value of.
*
* Returns the reference value for field # @field of the #GimpSizeEntry.
*
* The reference value is either a distance in pixels or a resolution
* in dpi, depending on which #GimpSizeEntryUpdatePolicy you chose in
* gimp_size_entry_new().
*
* Returns: The reference value of the chosen @field.
*
*/
gdouble
gimp_size_entry_get_refval (GimpSizeEntry *gse,
gint field)
{
GimpSizeEntryField *gsef;
/* return 1.0 to avoid division by zero */
g_return_val_if_fail (gse != NULL, 1.0);
g_return_val_if_fail (GIMP_IS_SIZE_ENTRY (gse), 1.0);
g_return_val_if_fail ((field >= 0) && (field < gse->number_of_fields), 1.0);
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
return gsef->refval;
}
static void
gimp_size_entry_update_refval (GimpSizeEntryField *gsef,
gdouble refval)
{
if (gsef->stop_recursion > 1)
return;
gsef->refval = refval;
switch (gsef->gse->update_policy)
{
case GIMP_SIZE_ENTRY_UPDATE_NONE:
break;
case GIMP_SIZE_ENTRY_UPDATE_SIZE:
switch (gsef->gse->unit)
{
case GIMP_UNIT_PIXEL:
gsef->value = refval;
break;
case GIMP_UNIT_PERCENT:
gsef->value =
CLAMP (100 * (refval - gsef->lower) / (gsef->upper - gsef->lower),
gsef->min_value, gsef->max_value);
break;
default:
gsef->value =
CLAMP (refval * gimp_unit_get_factor (gsef->gse->unit) /
gsef->resolution,
gsef->min_value, gsef->max_value);
break;
}
gtk_adjustment_set_value (GTK_ADJUSTMENT (gsef->value_adjustment),
gsef->value);
break;
case GIMP_SIZE_ENTRY_UPDATE_RESOLUTION:
gsef->value =
CLAMP (refval / gimp_unit_get_factor (gsef->gse->unit),
gsef->min_value, gsef->max_value);
gtk_adjustment_set_value (GTK_ADJUSTMENT (gsef->value_adjustment),
gsef->value);
break;
default:
break;
}
}
/**
* gimp_size_entry_set_refval;
* @gse: The sizeentry you want to set a reference value for.
* @field: The index of the field you want to set the reference value for.
* @refval: The new reference value for @field.
*
* Sets the reference value for field # @field of the #GimpSizeEntry.
*
* The @refval passed is either a distance in pixels or a resolution in dpi,
* depending on which #GimpSizeEntryUpdatePolicy you chose in
* gimp_size_entry_new().
*
*/
void
gimp_size_entry_set_refval (GimpSizeEntry *gse,
gint field,
gdouble refval)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail ((field >= 0) && (field < gse->number_of_fields));
gsef = (GimpSizeEntryField*) g_slist_nth_data (gse->fields, field);
refval = CLAMP (refval, gsef->min_refval, gsef->max_refval);
if (gse->show_refval)
{
gtk_adjustment_set_value (GTK_ADJUSTMENT (gsef->refval_adjustment),
refval);
}
gimp_size_entry_update_refval (gsef, refval);
}
static void
gimp_size_entry_refval_callback (GtkWidget *widget,
gpointer data)
{
GimpSizeEntryField *gsef;
gdouble new_refval;
gsef = (GimpSizeEntryField*) data;
new_refval = GTK_ADJUSTMENT (widget)->value;
if (gsef->refval != new_refval)
{
gimp_size_entry_update_refval (gsef, new_refval);
gtk_signal_emit (GTK_OBJECT (gsef->gse),
gimp_size_entry_signals[REFVAL_CHANGED]);
}
}
/**
* gimp_size_entry_get_unit:
* @gse: The sizeentry you want to know the unit of.
*
* Returns the #GimpUnit the user has selected in the #GimpSizeEntry's
* #GimpUnitMenu.
*
* Returns: The sizeentry's unit.
*
*/
GimpUnit
gimp_size_entry_get_unit (GimpSizeEntry *gse)
{
g_return_val_if_fail (gse != NULL, GIMP_UNIT_INCH);
g_return_val_if_fail (GIMP_IS_SIZE_ENTRY (gse), GIMP_UNIT_INCH);
return gse->unit;
}
static void
gimp_size_entry_update_unit (GimpSizeEntry *gse,
GimpUnit unit)
{
GimpSizeEntryField *gsef;
gint i;
gint digits;
gse->unit = unit;
for (i = 0; i < gse->number_of_fields; i++)
{
gsef = (GimpSizeEntryField *) g_slist_nth_data (gse->fields, i);
if (gse->update_policy == GIMP_SIZE_ENTRY_UPDATE_SIZE)
{
if (unit == GIMP_UNIT_PIXEL)
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
gsef->refval_digits);
else if (unit == GIMP_UNIT_PERCENT)
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
2);
else
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
GIMP_SIZE_ENTRY_DIGITS (unit));
}
else if (gse->update_policy == GIMP_SIZE_ENTRY_UPDATE_RESOLUTION)
{
digits =
-(gimp_unit_get_digits (unit) - gimp_unit_get_digits (GIMP_UNIT_INCH));
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gsef->value_spinbutton),
MAX (3 + digits, 3));
}
gsef->stop_recursion = 0; /* hack !!! */
gtk_signal_handler_block_by_data (GTK_OBJECT (gsef->value_adjustment),
gsef);
gimp_size_entry_set_refval_boundaries (gse, i,
gsef->min_refval, gsef->max_refval);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (gsef->value_adjustment),
gsef);
}
gtk_signal_emit (GTK_OBJECT (gse), gimp_size_entry_signals[VALUE_CHANGED]);
}
/**
* gimp_size_entry_set_unit:
* @gse: The sizeentry you want to change the unit for.
* @unit: The new unit.
*
* Sets the #GimpSizeEntry's unit. The reference value for all fields will
* stay the same but the value in units or pixels per unit will change
* according to which #GimpSizeEntryUpdatePolicy you chose in
* gimp_size_entry_new().
*
*/
void
gimp_size_entry_set_unit (GimpSizeEntry *gse,
GimpUnit unit)
{
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
g_return_if_fail (gse->menu_show_pixels || (unit != GIMP_UNIT_PIXEL));
g_return_if_fail (gse->menu_show_percent || (unit != GIMP_UNIT_PERCENT));
gimp_unit_menu_set_unit (GIMP_UNIT_MENU (gse->unitmenu), unit);
gimp_size_entry_update_unit (gse, unit);
}
static void
gimp_size_entry_unit_callback (GtkWidget *widget,
gpointer data)
{
gimp_size_entry_update_unit (GIMP_SIZE_ENTRY (data),
gimp_unit_menu_get_unit (GIMP_UNIT_MENU(widget)));
gtk_signal_emit (GTK_OBJECT (data), gimp_size_entry_signals[UNIT_CHANGED]);
}
/**
* gimp_size_entry_grab_focus:
* @gse: The sizeentry you want to grab the keyboard focus.
*
* This function is rather ugly and just a workaround for the fact that
* it's impossible to implement gtk_widget_grab_focus() for a #GtkTable.
*
*/
void
gimp_size_entry_grab_focus (GimpSizeEntry *gse)
{
GimpSizeEntryField *gsef;
g_return_if_fail (gse != NULL);
g_return_if_fail (GIMP_IS_SIZE_ENTRY (gse));
gsef = (GimpSizeEntryField*) gse->fields->data;
gtk_widget_grab_focus (gse->show_refval ?
gsef->refval_spinbutton : gsef->value_spinbutton);
}
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