mirror of https://github.com/GNOME/gimp.git
532 lines
21 KiB
C
532 lines
21 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* gimpscaleentry.c
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* Copyright (C) 2000 Michael Natterer <mitch@gimp.org>
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "libgimpmath/gimpmath.h"
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#include "libgimpbase/gimpbase.h"
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#include "gimpwidgets.h"
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static void gimp_scale_entry_unconstrained_adjustment_callback (GtkAdjustment *adjustment,
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GtkAdjustment *other_adj);
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static void gimp_scale_entry_exp_adjustment_callback (GtkAdjustment *adjustment,
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GtkAdjustment *other_adj);
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static void gimp_scale_entry_log_adjustment_callback (GtkAdjustment *adjustment,
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GtkAdjustment *other_adj);
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static GtkObject * gimp_scale_entry_new_internal (gboolean color_scale,
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GtkTable *table,
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gint column,
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gint row,
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const gchar *text,
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gint scale_width,
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gint spinbutton_width,
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gdouble value,
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gdouble lower,
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gdouble upper,
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gdouble step_increment,
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gdouble page_increment,
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guint digits,
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gboolean constrain,
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gdouble unconstrained_lower,
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gdouble unconstrained_upper,
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const gchar *tooltip,
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const gchar *help_id);
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static void
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gimp_scale_entry_unconstrained_adjustment_callback (GtkAdjustment *adjustment,
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GtkAdjustment *other_adj)
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{
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g_signal_handlers_block_by_func (other_adj,
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gimp_scale_entry_unconstrained_adjustment_callback,
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adjustment);
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gtk_adjustment_set_value (other_adj, gtk_adjustment_get_value (adjustment));
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g_signal_handlers_unblock_by_func (other_adj,
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gimp_scale_entry_unconstrained_adjustment_callback,
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adjustment);
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}
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static void
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gimp_scale_entry_log_adjustment_callback (GtkAdjustment *adjustment,
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GtkAdjustment *other_adj)
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{
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gdouble value;
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g_signal_handlers_block_by_func (other_adj,
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gimp_scale_entry_exp_adjustment_callback,
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adjustment);
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if (gtk_adjustment_get_lower (adjustment) <= 0.0)
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value = log (gtk_adjustment_get_value (adjustment) -
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gtk_adjustment_get_lower (adjustment) + 0.1);
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else
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value = log (gtk_adjustment_get_value (adjustment));
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gtk_adjustment_set_value (other_adj, value);
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g_signal_handlers_unblock_by_func (other_adj,
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gimp_scale_entry_exp_adjustment_callback,
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adjustment);
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}
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static void
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gimp_scale_entry_exp_adjustment_callback (GtkAdjustment *adjustment,
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GtkAdjustment *other_adj)
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{
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gdouble value;
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g_signal_handlers_block_by_func (other_adj,
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gimp_scale_entry_log_adjustment_callback,
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adjustment);
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value = exp (gtk_adjustment_get_value (adjustment));
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if (gtk_adjustment_get_lower (other_adj) <= 0.0)
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value += gtk_adjustment_get_lower (other_adj) - 0.1;
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gtk_adjustment_set_value (other_adj, value);
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g_signal_handlers_unblock_by_func (other_adj,
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gimp_scale_entry_log_adjustment_callback,
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adjustment);
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}
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static GtkObject *
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gimp_scale_entry_new_internal (gboolean color_scale,
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GtkTable *table,
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gint column,
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gint row,
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const gchar *text,
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gint scale_width,
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gint spinbutton_width,
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gdouble value,
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gdouble lower,
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gdouble upper,
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gdouble step_increment,
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gdouble page_increment,
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guint digits,
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gboolean constrain,
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gdouble unconstrained_lower,
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gdouble unconstrained_upper,
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const gchar *tooltip,
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const gchar *help_id)
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{
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GtkWidget *label;
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GtkWidget *scale;
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GtkWidget *spinbutton;
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GtkAdjustment *adjustment;
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GtkAdjustment *return_adj;
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label = gtk_label_new_with_mnemonic (text);
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gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
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gtk_table_attach (GTK_TABLE (table), label,
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column, column + 1, row, row + 1,
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GTK_FILL, GTK_FILL, 0, 0);
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gtk_widget_show (label);
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if (! constrain &&
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unconstrained_lower <= lower &&
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unconstrained_upper >= upper)
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{
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GtkAdjustment *constrained_adj;
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constrained_adj = (GtkAdjustment *)
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gtk_adjustment_new (value, lower, upper,
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step_increment, page_increment,
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0.0);
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adjustment = (GtkAdjustment *)
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gtk_adjustment_new (value,
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unconstrained_lower,
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unconstrained_upper,
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step_increment, page_increment, 0.0);
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spinbutton = gtk_spin_button_new (adjustment, step_increment, digits);
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gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
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g_signal_connect
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(constrained_adj, "value-changed",
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G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
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adjustment);
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g_signal_connect
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(adjustment, "value-changed",
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G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
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constrained_adj);
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return_adj = adjustment;
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adjustment = constrained_adj;
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}
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else
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{
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adjustment = (GtkAdjustment *)
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gtk_adjustment_new (value, lower, upper,
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step_increment, page_increment, 0.0);
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spinbutton = gtk_spin_button_new (adjustment, step_increment, digits);
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gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
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return_adj = adjustment;
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}
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gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
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if (spinbutton_width > 0)
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{
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if (spinbutton_width < 17)
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gtk_entry_set_width_chars (GTK_ENTRY (spinbutton), spinbutton_width);
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else
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gtk_widget_set_size_request (spinbutton, spinbutton_width, -1);
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}
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if (color_scale)
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{
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scale = gimp_color_scale_new (GTK_ORIENTATION_HORIZONTAL,
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GIMP_COLOR_SELECTOR_VALUE);
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gtk_range_set_adjustment (GTK_RANGE (scale), adjustment);
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}
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else
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{
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scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
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}
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if (scale_width > 0)
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gtk_widget_set_size_request (scale, scale_width, -1);
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gtk_scale_set_digits (GTK_SCALE (scale), digits);
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gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
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gtk_table_attach (GTK_TABLE (table), scale,
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column + 1, column + 2, row, row + 1,
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GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
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gtk_widget_show (scale);
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gtk_table_attach (GTK_TABLE (table), spinbutton,
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column + 2, column + 3, row, row + 1,
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GTK_FILL | GTK_SHRINK, GTK_SHRINK, 0, 0);
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gtk_widget_show (spinbutton);
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if (tooltip || help_id)
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{
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gimp_help_set_help_data (label, tooltip, help_id);
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gimp_help_set_help_data (scale, tooltip, help_id);
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gimp_help_set_help_data (spinbutton, tooltip, help_id);
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}
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g_object_set_data (G_OBJECT (return_adj), "label", label);
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g_object_set_data (G_OBJECT (return_adj), "scale", scale);
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g_object_set_data (G_OBJECT (return_adj), "spinbutton", spinbutton);
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return GTK_OBJECT (return_adj);
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}
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/**
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* gimp_scale_entry_new:
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* @table: The #GtkTable the widgets will be attached to.
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* @column: The column to start with.
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* @row: The row to attach the widgets.
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* @text: The text for the #GtkLabel which will appear
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* left of the #GtkHScale.
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* @scale_width: The minimum horizontal size of the #GtkHScale.
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* @spinbutton_width: The minimum horizontal size of the #GtkSpinButton.
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* @value: The initial value.
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* @lower: The lower boundary.
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* @upper: The upper boundary.
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* @step_increment: The step increment.
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* @page_increment: The page increment.
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* @digits: The number of decimal digits.
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* @constrain: %TRUE if the range of possible values of the
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* #GtkSpinButton should be the same as of the #GtkHScale.
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* @unconstrained_lower: The spinbutton's lower boundary
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* if @constrain == %FALSE.
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* @unconstrained_upper: The spinbutton's upper boundary
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* if @constrain == %FALSE.
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* @tooltip: A tooltip message for the scale and the spinbutton.
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* @help_id: The widgets' help_id (see gimp_help_set_help_data()).
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*
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* This function creates a #GtkLabel, a #GtkHScale and a #GtkSpinButton and
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* attaches them to a 3-column #GtkTable.
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*
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* Returns: The #GtkSpinButton's #GtkAdjustment.
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**/
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GtkObject *
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gimp_scale_entry_new (GtkTable *table,
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gint column,
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gint row,
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const gchar *text,
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gint scale_width,
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gint spinbutton_width,
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gdouble value,
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gdouble lower,
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gdouble upper,
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gdouble step_increment,
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gdouble page_increment,
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guint digits,
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gboolean constrain,
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gdouble unconstrained_lower,
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gdouble unconstrained_upper,
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const gchar *tooltip,
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const gchar *help_id)
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{
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return gimp_scale_entry_new_internal (FALSE,
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table, column, row,
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text, scale_width, spinbutton_width,
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value, lower, upper,
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step_increment, page_increment,
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digits,
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constrain,
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unconstrained_lower,
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unconstrained_upper,
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tooltip, help_id);
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}
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/**
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* gimp_color_scale_entry_new:
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* @table: The #GtkTable the widgets will be attached to.
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* @column: The column to start with.
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* @row: The row to attach the widgets.
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* @text: The text for the #GtkLabel which will appear
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* left of the #GtkHScale.
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* @scale_width: The minimum horizontal size of the #GtkHScale.
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* @spinbutton_width: The minimum horizontal size of the #GtkSpinButton.
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* @value: The initial value.
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* @lower: The lower boundary.
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* @upper: The upper boundary.
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* @step_increment: The step increment.
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* @page_increment: The page increment.
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* @digits: The number of decimal digits.
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* @tooltip: A tooltip message for the scale and the spinbutton.
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* @help_id: The widgets' help_id (see gimp_help_set_help_data()).
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*
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* This function creates a #GtkLabel, a #GimpColorScale and a
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* #GtkSpinButton and attaches them to a 3-column #GtkTable.
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*
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* Returns: The #GtkSpinButton's #GtkAdjustment.
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**/
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GtkObject *
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gimp_color_scale_entry_new (GtkTable *table,
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gint column,
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gint row,
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const gchar *text,
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gint scale_width,
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gint spinbutton_width,
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gdouble value,
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gdouble lower,
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gdouble upper,
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gdouble step_increment,
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gdouble page_increment,
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guint digits,
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const gchar *tooltip,
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const gchar *help_id)
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{
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return gimp_scale_entry_new_internal (TRUE,
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table, column, row,
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text, scale_width, spinbutton_width,
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value, lower, upper,
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step_increment, page_increment,
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digits,
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TRUE, 0.0, 0.0,
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tooltip, help_id);
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}
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/**
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* gimp_scale_entry_set_logarithmic:
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* @adjustment: a #GtkAdjustment as returned by gimp_scale_entry_new()
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* @logarithmic: a boolean value to set or reset logarithmic behaviour
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* of the scale widget
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*
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* Sets whether the scale_entry's scale widget will behave in a linear
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* or logharithmic fashion. Useful when an entry has to attend large
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* ranges, but smaller selections on that range require a finer
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* adjustment.
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*
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* Since: GIMP 2.2
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**/
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void
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gimp_scale_entry_set_logarithmic (GtkObject *adjustment,
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gboolean logarithmic)
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{
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GtkAdjustment *adj;
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GtkAdjustment *scale_adj;
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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adj = GTK_ADJUSTMENT (adjustment);
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scale_adj = GIMP_SCALE_ENTRY_SCALE_ADJ (adjustment);
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if (logarithmic == gimp_scale_entry_get_logarithmic (adjustment))
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return;
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if (logarithmic)
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{
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gdouble correction;
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gdouble log_value, log_lower, log_upper;
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gdouble log_step_increment, log_page_increment;
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correction = (gtk_adjustment_get_lower (scale_adj) > 0 ?
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0 : 0.1 + - gtk_adjustment_get_lower (scale_adj));
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log_value = log (gtk_adjustment_get_value (scale_adj) + correction);
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log_lower = log (gtk_adjustment_get_lower (scale_adj) + correction);
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log_upper = log (gtk_adjustment_get_upper (scale_adj) + correction);
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log_step_increment =
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(log_upper - log_lower) / ((gtk_adjustment_get_upper (scale_adj) -
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gtk_adjustment_get_lower (scale_adj)) /
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gtk_adjustment_get_step_increment (scale_adj));
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log_page_increment =
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(log_upper - log_lower) / ((gtk_adjustment_get_upper (scale_adj) -
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gtk_adjustment_get_lower (scale_adj)) /
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gtk_adjustment_get_page_increment (scale_adj));
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if (scale_adj == adj)
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{
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GtkObject *new_adj;
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new_adj = gtk_adjustment_new (gtk_adjustment_get_value (scale_adj),
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gtk_adjustment_get_lower (scale_adj),
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gtk_adjustment_get_upper (scale_adj),
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gtk_adjustment_get_step_increment (scale_adj),
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gtk_adjustment_get_page_increment (scale_adj),
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0.0);
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gtk_range_set_adjustment (GTK_RANGE (GIMP_SCALE_ENTRY_SCALE (adj)),
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GTK_ADJUSTMENT (new_adj));
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scale_adj = (GtkAdjustment *) new_adj;
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}
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else
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{
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g_signal_handlers_disconnect_by_func (adj,
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gimp_scale_entry_unconstrained_adjustment_callback,
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scale_adj);
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g_signal_handlers_disconnect_by_func (scale_adj,
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gimp_scale_entry_unconstrained_adjustment_callback,
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adj);
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}
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gtk_adjustment_configure (scale_adj,
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log_value, log_lower, log_upper,
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log_step_increment, log_page_increment, 0.0);
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g_signal_connect (scale_adj, "value-changed",
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G_CALLBACK (gimp_scale_entry_exp_adjustment_callback),
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adj);
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g_signal_connect (adj, "value-changed",
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G_CALLBACK (gimp_scale_entry_log_adjustment_callback),
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scale_adj);
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g_object_set_data (G_OBJECT (adjustment),
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"logarithmic", GINT_TO_POINTER (TRUE));
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}
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else
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{
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gdouble lower, upper;
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g_signal_handlers_disconnect_by_func (adj,
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gimp_scale_entry_log_adjustment_callback,
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scale_adj);
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g_signal_handlers_disconnect_by_func (scale_adj,
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gimp_scale_entry_exp_adjustment_callback,
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adj);
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lower = exp (gtk_adjustment_get_lower (scale_adj));
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upper = exp (gtk_adjustment_get_upper (scale_adj));
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if (gtk_adjustment_get_lower (adj) <= 0.0)
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{
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lower += - 0.1 + gtk_adjustment_get_lower (adj);
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upper += - 0.1 + gtk_adjustment_get_lower (adj);
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}
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gtk_adjustment_configure (scale_adj,
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gtk_adjustment_get_value (adj),
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lower, upper,
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gtk_adjustment_get_step_increment (adj),
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gtk_adjustment_get_page_increment (adj),
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0.0);
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g_signal_connect (scale_adj, "value-changed",
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G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
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adj);
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g_signal_connect (adj, "value-changed",
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G_CALLBACK (gimp_scale_entry_unconstrained_adjustment_callback),
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scale_adj);
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g_object_set_data (G_OBJECT (adjustment),
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"logarithmic", GINT_TO_POINTER (FALSE));
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}
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}
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/**
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* gimp_scale_entry_get_logarithmic:
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* @adjustment: a #GtkAdjustment as returned by gimp_scale_entry_new()
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*
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* Return value: %TRUE if the the entry's scale widget will behave in
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* logharithmic fashion, %FALSE for linear behaviour.
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*
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* Since: GIMP 2.2
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**/
|
|
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);
|
|
}
|