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gimp/libgimpwidgets/gimpscaleentry.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpscaleentry.c
* Copyright (C) 2000 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 "config.h"
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "gimpwidgets.h"
static void gimp_scale_entry_unconstrained_adjustment_callback (GtkAdjustment *adjustment,
GtkAdjustment *other_adj);
static void gimp_scale_entry_exp_adjustment_callback (GtkAdjustment *adjustment,
GtkAdjustment *other_adj);
static void gimp_scale_entry_log_adjustment_callback (GtkAdjustment *adjustment,
GtkAdjustment *other_adj);
static GtkObject * gimp_scale_entry_new_internal (gboolean color_scale,
GtkTable *table,
gint column,
gint row,
const gchar *text,
gint scale_width,
gint spinbutton_width,
gdouble value,
gdouble lower,
gdouble upper,
gdouble step_increment,
gdouble page_increment,
guint digits,
gboolean constrain,
gdouble unconstrained_lower,
gdouble unconstrained_upper,
const gchar *tooltip,
const gchar *help_id);
static void
gimp_scale_entry_unconstrained_adjustment_callback (GtkAdjustment *adjustment,
GtkAdjustment *other_adj)
{
g_signal_handlers_block_by_func (other_adj,
gimp_scale_entry_unconstrained_adjustment_callback,
adjustment);
gtk_adjustment_set_value (other_adj, gtk_adjustment_get_value (adjustment));
g_signal_handlers_unblock_by_func (other_adj,
gimp_scale_entry_unconstrained_adjustment_callback,
adjustment);
}
static void
gimp_scale_entry_log_adjustment_callback (GtkAdjustment *adjustment,
GtkAdjustment *other_adj)
{
gdouble value;
g_signal_handlers_block_by_func (other_adj,
gimp_scale_entry_exp_adjustment_callback,
adjustment);
if (adjustment->lower <= 0.0)
value = log (adjustment->value - adjustment->lower + 0.1);
else
value = log (adjustment->value);
gtk_adjustment_set_value (other_adj, value);
g_signal_handlers_unblock_by_func (other_adj,
gimp_scale_entry_exp_adjustment_callback,
adjustment);
}
static void
gimp_scale_entry_exp_adjustment_callback (GtkAdjustment *adjustment,
GtkAdjustment *other_adj)
{
gdouble value;
g_signal_handlers_block_by_func (other_adj,
gimp_scale_entry_log_adjustment_callback,
adjustment);
value = exp (gtk_adjustment_get_value (adjustment));
if (other_adj->lower <= 0.0)
value += other_adj->lower - 0.1;
gtk_adjustment_set_value (other_adj, value);
g_signal_handlers_unblock_by_func (other_adj,
gimp_scale_entry_log_adjustment_callback,
adjustment);
}
static GtkObject *
gimp_scale_entry_new_internal (gboolean color_scale,
GtkTable *table,
gint column,
gint row,
const gchar *text,
gint scale_width,
gint spinbutton_width,
gdouble value,
gdouble lower,
gdouble upper,
gdouble step_increment,
gdouble page_increment,
guint digits,
gboolean constrain,
gdouble unconstrained_lower,
gdouble unconstrained_upper,
const gchar *tooltip,
const gchar *help_id)
{
GtkWidget *label;
GtkWidget *ebox;
GtkWidget *scale;
GtkWidget *spinbutton;
GtkObject *adjustment;
GtkObject *return_adj;
label = gtk_label_new_with_mnemonic (text);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
if (tooltip)
{
ebox = g_object_new (GTK_TYPE_EVENT_BOX,
"visible-window", FALSE,
NULL);
gtk_table_attach (GTK_TABLE (table), ebox,
column, column + 1, row, row + 1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (ebox);
gtk_container_add (GTK_CONTAINER (ebox), label);
}
else
{
ebox = NULL;
gtk_table_attach (GTK_TABLE (table), label,
column, column + 1, row, row + 1,
GTK_FILL, GTK_FILL, 0, 0);
}
gtk_widget_show (label);
if (! constrain &&
unconstrained_lower <= lower &&
unconstrained_upper >= upper)
{
GtkObject *constrained_adj;
constrained_adj = gtk_adjustment_new (value, lower, upper,
step_increment, page_increment,
0.0);
spinbutton = gimp_spin_button_new (&adjustment, value,
unconstrained_lower,
unconstrained_upper,
step_increment, page_increment, 0.0,
1.0, digits);
g_signal_connect
(G_OBJECT (constrained_adj), "value-changed",
G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
adjustment);
g_signal_connect
(G_OBJECT (adjustment), "value-changed",
G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
constrained_adj);
return_adj = adjustment;
adjustment = constrained_adj;
}
else
{
spinbutton = gimp_spin_button_new (&adjustment, value, lower, upper,
step_increment, page_increment, 0.0,
1.0, digits);
return_adj = adjustment;
}
gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
if (spinbutton_width > 0)
{
if (spinbutton_width < 17)
gtk_entry_set_width_chars (GTK_ENTRY (spinbutton), spinbutton_width);
else
gtk_widget_set_size_request (spinbutton, spinbutton_width, -1);
}
if (color_scale)
{
scale = gimp_color_scale_new (GTK_ORIENTATION_HORIZONTAL,
GIMP_COLOR_SELECTOR_VALUE);
gtk_range_set_adjustment (GTK_RANGE (scale),
GTK_ADJUSTMENT (adjustment));
}
else
{
scale = gtk_hscale_new (GTK_ADJUSTMENT (adjustment));
}
if (scale_width > 0)
gtk_widget_set_size_request (scale, scale_width, -1);
gtk_scale_set_digits (GTK_SCALE (scale), digits);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
gtk_table_attach (GTK_TABLE (table), scale,
column + 1, column + 2, row, row + 1,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (scale);
gtk_table_attach (GTK_TABLE (table), spinbutton,
column + 2, column + 3, row, row + 1,
GTK_SHRINK, GTK_SHRINK, 0, 0);
gtk_widget_show (spinbutton);
if (tooltip || help_id)
{
if (ebox)
gimp_help_set_help_data (ebox, tooltip, help_id);
gimp_help_set_help_data (scale, tooltip, help_id);
gimp_help_set_help_data (spinbutton, tooltip, help_id);
}
g_object_set_data (G_OBJECT (return_adj), "label", label);
g_object_set_data (G_OBJECT (return_adj), "scale", scale);
g_object_set_data (G_OBJECT (return_adj), "spinbutton", spinbutton);
return return_adj;
}
/**
* gimp_scale_entry_new:
* @table: The #GtkTable the widgets will be attached to.
* @column: The column to start with.
* @row: The row to attach the widgets.
* @text: The text for the #GtkLabel which will appear
* left of the #GtkHScale.
* @scale_width: The minimum horizontal size of the #GtkHScale.
* @spinbutton_width: The minimum horizontal size of the #GtkSpinButton.
* @value: The initial value.
* @lower: The lower boundary.
* @upper: The upper boundary.
* @step_increment: The step increment.
* @page_increment: The page increment.
* @digits: The number of decimal digits.
* @constrain: %TRUE if the range of possible values of the
* #GtkSpinButton should be the same as of the #GtkHScale.
* @unconstrained_lower: The spinbutton's lower boundary
* if @constrain == %FALSE.
* @unconstrained_upper: The spinbutton's upper boundary
* if @constrain == %FALSE.
* @tooltip: A tooltip message for the scale and the spinbutton.
* @help_id: The widgets' help_id (see gimp_help_set_help_data()).
*
* This function creates a #GtkLabel, a #GtkHScale and a #GtkSpinButton and
* attaches them to a 3-column #GtkTable.
*
* Returns: The #GtkSpinButton's #GtkAdjustment.
**/
GtkObject *
gimp_scale_entry_new (GtkTable *table,
gint column,
gint row,
const gchar *text,
gint scale_width,
gint spinbutton_width,
gdouble value,
gdouble lower,
gdouble upper,
gdouble step_increment,
gdouble page_increment,
guint digits,
gboolean constrain,
gdouble unconstrained_lower,
gdouble unconstrained_upper,
const gchar *tooltip,
const gchar *help_id)
{
return gimp_scale_entry_new_internal (FALSE,
table, column, row,
text, scale_width, spinbutton_width,
value, lower, upper,
step_increment, page_increment,
digits,
constrain,
unconstrained_lower,
unconstrained_upper,
tooltip, help_id);
}
/**
* gimp_color_scale_entry_new:
* @table: The #GtkTable the widgets will be attached to.
* @column: The column to start with.
* @row: The row to attach the widgets.
* @text: The text for the #GtkLabel which will appear
* left of the #GtkHScale.
* @scale_width: The minimum horizontal size of the #GtkHScale.
* @spinbutton_width: The minimum horizontal size of the #GtkSpinButton.
* @value: The initial value.
* @lower: The lower boundary.
* @upper: The upper boundary.
* @step_increment: The step increment.
* @page_increment: The page increment.
* @digits: The number of decimal digits.
* @tooltip: A tooltip message for the scale and the spinbutton.
* @help_id: The widgets' help_id (see gimp_help_set_help_data()).
*
* This function creates a #GtkLabel, a #GimpColorScale and a
* #GtkSpinButton and attaches them to a 3-column #GtkTable.
*
* Returns: The #GtkSpinButton's #GtkAdjustment.
**/
GtkObject *
gimp_color_scale_entry_new (GtkTable *table,
gint column,
gint row,
const gchar *text,
gint scale_width,
gint spinbutton_width,
gdouble value,
gdouble lower,
gdouble upper,
gdouble step_increment,
gdouble page_increment,
guint digits,
const gchar *tooltip,
const gchar *help_id)
{
return gimp_scale_entry_new_internal (TRUE,
table, column, row,
text, scale_width, spinbutton_width,
value, lower, upper,
step_increment, page_increment,
digits,
TRUE, 0.0, 0.0,
tooltip, help_id);
}
/**
* gimp_scale_entry_set_logarithmic:
* @adjustment: a #GtkAdjustment as returned by gimp_scale_entry_new()
* @logarithmic: a boolean value to set or reset logarithmic behaviour
* of the scale widget
*
* Sets whether the scale_entry's scale widget will behave in a linear
* or logharithmic fashion. Useful when an entry has to attend large
* ranges, but smaller selections on that range require a finer
* adjustment.
*
* Since: GIMP 2.2
**/
void
gimp_scale_entry_set_logarithmic (GtkObject *adjustment,
gboolean logarithmic)
{
GtkAdjustment *adj;
GtkAdjustment *scale_adj;
gdouble correction;
gdouble log_value, log_lower, log_upper;
gdouble log_step_increment, log_page_increment;
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
adj = GTK_ADJUSTMENT (adjustment);
scale_adj = GIMP_SCALE_ENTRY_SCALE_ADJ (adjustment);
if (logarithmic)
{
if (gimp_scale_entry_get_logarithmic (adjustment))
return;
correction = scale_adj->lower > 0 ? 0 : 0.1 + - scale_adj->lower;
log_value = log (scale_adj->value + correction);
log_lower = log (scale_adj->lower + correction);
log_upper = log (scale_adj->upper + correction);
log_step_increment = (log_upper - log_lower) / ((scale_adj->upper -
scale_adj->lower) /
scale_adj->step_increment);
log_page_increment = (log_upper - log_lower) / ((scale_adj->upper -
scale_adj->lower) /
scale_adj->page_increment);
if (scale_adj == adj)
{
GtkObject *new_adj;
gdouble lower;
gdouble upper;
lower = scale_adj->lower;
upper = scale_adj->upper;
new_adj = gtk_adjustment_new (scale_adj->value,
scale_adj->lower,
scale_adj->upper,
scale_adj->step_increment,
scale_adj->page_increment,
0.0);
gtk_range_set_adjustment (GTK_RANGE (GIMP_SCALE_ENTRY_SCALE (adj)),
GTK_ADJUSTMENT (new_adj));
scale_adj = (GtkAdjustment *) new_adj;
}
else
{
g_signal_handlers_disconnect_by_func (adj,
G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
scale_adj);
g_signal_handlers_disconnect_by_func (scale_adj,
G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
adj);
}
scale_adj->value = log_value;
scale_adj->lower = log_lower;
scale_adj->upper = log_upper;
scale_adj->step_increment = log_step_increment;
scale_adj->page_increment = log_page_increment;
g_signal_connect (scale_adj, "value-changed",
G_CALLBACK (gimp_scale_entry_exp_adjustment_callback),
adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_scale_entry_log_adjustment_callback),
scale_adj);
g_object_set_data (G_OBJECT (adjustment),
"logarithmic", GINT_TO_POINTER (TRUE));
}
else
{
gdouble lower, upper;
if (! gimp_scale_entry_get_logarithmic (adjustment))
return;
g_signal_handlers_disconnect_by_func (adj,
G_CALLBACK (gimp_scale_entry_log_adjustment_callback),
scale_adj);
g_signal_handlers_disconnect_by_func (scale_adj,
G_CALLBACK (gimp_scale_entry_exp_adjustment_callback),
adj);
lower = exp (scale_adj->lower);
upper = exp (scale_adj->upper);
if (adj->lower <= 0.0)
{
lower += - 0.1 + adj->lower;
upper += - 0.1 + adj->lower;
}
scale_adj->value = adj->value;
scale_adj->lower = lower;
scale_adj->upper = upper;
scale_adj->step_increment = adj->step_increment;
scale_adj->page_increment = adj->page_increment;
g_signal_connect (scale_adj, "value-changed",
G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
scale_adj);
g_object_set_data (G_OBJECT (adjustment),
"logarithmic", GINT_TO_POINTER (FALSE));
}
}
/**
* gimp_scale_entry_get_logarithmic:
* @adjustment: a #GtkAdjustment as returned by gimp_scale_entry_new()
*
* Return value: %TRUE if the the entry's scale widget will behave in
* logharithmic fashion, %FALSE for linear behaviour.
*
* Since: GIMP 2.2
**/
gboolean
gimp_scale_entry_get_logarithmic (GtkObject *adjustment)
{
return GPOINTER_TO_INT (g_object_get_data (G_OBJECT (adjustment),
"logarithmic"));
}
/**
* gimp_scale_entry_set_sensitive:
* @adjustment: a #GtkAdjustment returned by gimp_scale_entry_new()
* @sensitive: a boolean value with the same semantics as the @sensitive
* parameter of gtk_widget_set_sensitive()
*
* Sets the sensitivity of the scale_entry's #GtkLabel, #GtkHScale and
* #GtkSpinbutton.
**/
void
gimp_scale_entry_set_sensitive (GtkObject *adjustment,
gboolean sensitive)
{
GtkWidget *widget;
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
widget = GIMP_SCALE_ENTRY_LABEL (adjustment);
if (widget)
gtk_widget_set_sensitive (widget, sensitive);
widget = GIMP_SCALE_ENTRY_SCALE (adjustment);
if (widget)
gtk_widget_set_sensitive (widget, sensitive);
widget = GIMP_SCALE_ENTRY_SPINBUTTON (adjustment);
if (widget)
gtk_widget_set_sensitive (widget, sensitive);
}
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