mirror of https://github.com/GNOME/gimp.git
221 lines
7.0 KiB
C
221 lines
7.0 KiB
C
/* $Id$
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* dialog_f.c -- functions for creating a GTK gdouble slider/value input.
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*
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* Copyright (C) 1999 Winston Chang
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* <wchang3@students.wisc.edu>
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* <winston@steppe.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <gtk/gtk.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "dialog_f.h"
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/*
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* 'dialog_create_value_f()' - Create an gdouble value control...
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*/
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void
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dialog_create_value_f(char *title, /* Label for control */
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GtkTable *table, /* Table container to use */
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int row, /* Row # for container */
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gdouble *value, /* Value holder */
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gdouble increment,/* Size of mouse-click and
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keyboard increment */
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gint precision,/* Number of digits after decimal point */
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int left, /* Minimum value for slider */
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int right) /* Maximum value for slider */
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{
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GtkWidget *label; /* Control label */
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GtkWidget *scale; /* Scale widget */
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GtkWidget *entry; /* Text widget */
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GtkObject *scale_data; /* Scale data */
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char buf[256]; /* String buffer */
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/* Create label... */
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label = gtk_label_new(title);
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gtk_misc_set_alignment(GTK_MISC(label), 0.0, 1.0);
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gtk_table_attach(table, label, 0, 1, row, row + 1, GTK_FILL, GTK_FILL, 4, 0);
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gtk_widget_show(label);
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/*
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* Scale...
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*/
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/* the "right+increment" is necessary to make it stop on 5.0 instead
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of 4.9. I think this is a shortcoming of GTK's adjustments */
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scale_data = gtk_adjustment_new(*value, left, right+increment,
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increment, increment, increment);
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gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
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(GtkSignalFunc) dialog_fscale_update, value);
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scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
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gtk_scale_set_digits( GTK_SCALE(scale), precision);
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gtk_widget_set_usize(scale, SCALE_WIDTH, 0);
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gtk_table_attach( table, scale, 1, 2, row, row + 1,
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GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
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gtk_scale_set_draw_value( GTK_SCALE(scale), FALSE);
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gtk_range_set_update_policy( GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
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gtk_widget_show(scale);
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/*
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* Text entry...
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*/
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entry = gtk_entry_new();
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gtk_object_set_user_data(GTK_OBJECT(entry), scale_data);
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gtk_object_set_user_data(scale_data, entry);
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gtk_widget_set_usize(entry, ENTRY_WIDTH, 0);
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sprintf(buf, "%g", *value);
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gtk_entry_set_text(GTK_ENTRY(entry), buf);
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gtk_signal_connect(GTK_OBJECT(entry), "changed",
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(GtkSignalFunc) dialog_fentry_update,
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value);
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gtk_table_attach( GTK_TABLE(table), entry, 2, 3, row, row + 1,
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GTK_FILL, GTK_FILL, 4, 0);
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gtk_widget_show(entry);
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}
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/*
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* 'dialog_fscale_update()' - Update the value field using the scale.
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*/
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void
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dialog_fscale_update(GtkAdjustment *adjustment, /* I - New value */
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gdouble *value) /* I - Current value */
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{
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GtkWidget *entry; /* Text entry widget */
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char buf[256]; /* Text buffer */
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if (*value != adjustment->value)
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{
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*value = adjustment->value;
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entry = gtk_object_get_user_data(GTK_OBJECT(adjustment));
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/* UGLY HACK ALERT */
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/* use precision of 5 */
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sprintf(buf, "%.5g", *value);
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/* This is to round the number to a reasonable value. For some
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some reason it wants to increment by about 0.1000000105 instead
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of 0.1. That annoys me. */
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*value = atof(buf);
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/* assign the text value to the entry */
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gtk_signal_handler_block_by_data(GTK_OBJECT(entry), value);
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gtk_entry_set_text(GTK_ENTRY(entry), buf);
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gtk_signal_handler_unblock_by_data(GTK_OBJECT(entry), value);
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/* assign the rounded value back the adjustment */
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adjustment->value = *value;
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}
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}
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/*
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* 'dialog_fentry_update()' - Update the value field using the text entry.
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*/
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void
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dialog_fentry_update(GtkWidget *widget, /* I - Entry widget */
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gdouble *value) /* I - Current value */
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{
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GtkAdjustment *adjustment;
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gdouble new_value;
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/* these three are for the string cleaner */
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gint shift;
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gboolean periodfound;
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gint digits_after_period;
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gchar* textvalue;
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gchar newtextvalue[MAX_ENTRY_LENGTH+1];
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gint oldtextlength;
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gint i;
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/* new_value = atod(gtk_entry_get_text(GTK_ENTRY(widget))); */
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textvalue = gtk_entry_get_text( GTK_ENTRY(widget));
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strncpy(newtextvalue, textvalue, MAX_ENTRY_LENGTH);
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/* clean up new value so that it only has one digit after decimal
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and no weird chars */
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newtextvalue[MAX_ENTRY_LENGTH] ='\0';
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oldtextlength = strlen(newtextvalue);
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/* this stuff cleans up non-numeric chars */
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shift=0;
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periodfound = FALSE;
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digits_after_period = 0;
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for (i=0; i+shift < oldtextlength; i++) {
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if (newtextvalue[i] == '.') {
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if (periodfound) shift++; /* if not first period, ignore */
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else periodfound = TRUE; /* if first period, mark periodfound */
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}
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else if (newtextvalue[i]>='0' && newtextvalue[i]<='9') {
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if (periodfound) {
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digits_after_period++;
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/* this is to ignore a certain number of digits after period */
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if (digits_after_period > ENTRY_PRECISION) shift++;
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}
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}
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else shift++; /* ignore non-numeric chars */
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/* copy shifted value back, making sure we don't run off end */
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if (i+shift >= MAX_ENTRY_LENGTH) newtextvalue[i] = '\0';
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else newtextvalue[i] = newtextvalue[i+shift];
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}
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newtextvalue[i]='\0';
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/* write the cleaned-up value into the entry box */
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/* block the signal handler so we don't go into an infinite recursion */
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gtk_signal_handler_block_by_data(GTK_OBJECT(widget), value);
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/* update the entry text */
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gtk_entry_set_text( GTK_ENTRY(widget), newtextvalue);
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/* gtk_entry_set_position( GTK_ENTRY(widget), i); */ /* doesn't seem to work */
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/* unblock signal handler */
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gtk_signal_handler_unblock_by_data(GTK_OBJECT(widget), value);
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/* g_print(newtextvalue); */
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/* g_print("\n"); */
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/* set the adjustment thingy */
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new_value = atof(newtextvalue);
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/* g_print("%e.", new_value); */
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/* set the new value */
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if (*value != new_value) {
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adjustment = gtk_object_get_user_data(GTK_OBJECT(widget));
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if ((new_value >= adjustment->lower) &&
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(new_value <= adjustment->upper)) {
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*value = new_value;
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adjustment->value = new_value;
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gtk_signal_emit_by_name(GTK_OBJECT(adjustment), "value_changed");
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}
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}
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}
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