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/* Spin Button
*
* GtkSpinButton provides convenient ways to input data
* that can be seen as a value in a range. The examples
* here show that this does not necessarily mean numeric
* values, and it can include custom formatting.
*/
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <math.h>
#include <stdlib.h>
static gint
hex_spin_input (GtkSpinButton *spin_button,
gdouble *new_val)
{
const gchar *buf;
gchar *err;
gdouble res;
buf = gtk_editable_get_text (GTK_EDITABLE (spin_button));
res = strtol (buf, &err, 16);
*new_val = res;
if (*err)
return GTK_INPUT_ERROR;
else
return TRUE;
}
static gint
hex_spin_output (GtkSpinButton *spin_button)
{
GtkAdjustment *adjustment;
gchar *buf;
gdouble val;
adjustment = gtk_spin_button_get_adjustment (spin_button);
val = gtk_adjustment_get_value (adjustment);
if (fabs (val) < 1e-5)
buf = g_strdup ("0x00");
else
buf = g_strdup_printf ("0x%.2X", (gint) val);
if (strcmp (buf, gtk_editable_get_text (GTK_EDITABLE (spin_button))))
gtk_editable_set_text (GTK_EDITABLE (spin_button), buf);
g_free (buf);
return TRUE;
}
static gint
time_spin_input (GtkSpinButton *spin_button,
gdouble *new_val)
{
const gchar *text;
gchar **str;
gboolean found = FALSE;
gint hours;
gint minutes;
gchar *endh;
gchar *endm;
text = gtk_editable_get_text (GTK_EDITABLE (spin_button));
str = g_strsplit (text, ":", 2);
if (g_strv_length (str) == 2)
{
hours = strtol (str[0], &endh, 10);
minutes = strtol (str[1], &endm, 10);
if (!*endh && !*endm &&
0 <= hours && hours < 24 &&
0 <= minutes && minutes < 60)
{
*new_val = hours * 60 + minutes;
found = TRUE;
}
}
g_strfreev (str);
if (!found)
{
*new_val = 0.0;
return GTK_INPUT_ERROR;
}
return TRUE;
}
static gint
time_spin_output (GtkSpinButton *spin_button)
{
GtkAdjustment *adjustment;
gchar *buf;
gdouble hours;
gdouble minutes;
adjustment = gtk_spin_button_get_adjustment (spin_button);
hours = gtk_adjustment_get_value (adjustment) / 60.0;
minutes = (hours - floor (hours)) * 60.0;
buf = g_strdup_printf ("%02.0f:%02.0f", floor (hours), floor (minutes + 0.5));
if (strcmp (buf, gtk_editable_get_text (GTK_EDITABLE (spin_button))))
gtk_editable_set_text (GTK_EDITABLE (spin_button), buf);
g_free (buf);
return TRUE;
}
static gchar *month[12] = {
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
};
static gint
month_spin_input (GtkSpinButton *spin_button,
gdouble *new_val)
{
gint i;
gchar *tmp1, *tmp2;
gboolean found = FALSE;
for (i = 1; i <= 12; i++)
{
tmp1 = g_ascii_strup (month[i - 1], -1);
tmp2 = g_ascii_strup (gtk_editable_get_text (GTK_EDITABLE (spin_button)), -1);
if (strstr (tmp1, tmp2) == tmp1)
found = TRUE;
g_free (tmp1);
g_free (tmp2);
if (found)
break;
}
if (!found)
{
*new_val = 0.0;
return GTK_INPUT_ERROR;
}
*new_val = (gdouble) i;
return TRUE;
}
static gint
month_spin_output (GtkSpinButton *spin_button)
{
GtkAdjustment *adjustment;
gdouble value;
gint i;
adjustment = gtk_spin_button_get_adjustment (spin_button);
value = gtk_adjustment_get_value (adjustment);
for (i = 1; i <= 12; i++)
if (fabs (value - (double)i) < 1e-5)
{
if (strcmp (month[i-1], gtk_editable_get_text (GTK_EDITABLE (spin_button))))
gtk_editable_set_text (GTK_EDITABLE (spin_button), month[i-1]);
}
return TRUE;
}
static gboolean
value_to_label (GBinding *binding,
const GValue *from,
GValue *to,
gpointer user_data)
{
g_value_take_string (to, g_strdup_printf ("%g", g_value_get_double (from)));
return TRUE;
}
GtkWidget *
do_spinbutton (GtkWidget *do_widget)
{
static GtkWidget *window;
if (!window)
{
GtkBuilder *builder;
GtkAdjustment *adj;
GtkWidget *label;
builder = gtk_builder_new ();
gtk_builder_add_callback_symbols (builder,
"hex_spin_input", G_CALLBACK (hex_spin_input),
"hex_spin_output", G_CALLBACK (hex_spin_output),
"time_spin_input", G_CALLBACK (time_spin_input),
"time_spin_output", G_CALLBACK (time_spin_output),
"month_spin_input", G_CALLBACK (month_spin_input),
"month_spin_output", G_CALLBACK (month_spin_output),
NULL);
gtk_builder_add_from_resource (builder, "/spinbutton/spinbutton.ui", NULL);
window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Spin Buttons");
gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "basic_adjustment"));
label = GTK_WIDGET (gtk_builder_get_object (builder, "basic_label"));
g_object_bind_property_full (adj, "value",
label, "label",
G_BINDING_SYNC_CREATE,
value_to_label,
NULL,
NULL, NULL);
adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "hex_adjustment"));
label = GTK_WIDGET (gtk_builder_get_object (builder, "hex_label"));
g_object_bind_property_full (adj, "value",
label, "label",
G_BINDING_SYNC_CREATE,
value_to_label,
NULL,
NULL, NULL);
adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "time_adjustment"));
label = GTK_WIDGET (gtk_builder_get_object (builder, "time_label"));
g_object_bind_property_full (adj, "value",
label, "label",
G_BINDING_SYNC_CREATE,
value_to_label,
NULL,
NULL, NULL);
adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "month_adjustment"));
label = GTK_WIDGET (gtk_builder_get_object (builder, "month_label"));
g_object_bind_property_full (adj, "value",
label, "label",
G_BINDING_SYNC_CREATE,
value_to_label,
NULL,
NULL, NULL);
g_object_unref (builder);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}
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