gtk2/demos/gtk-demo/spinbutton.c
Chun-wei Fan efb875daef demos: Mark non-static signal handler symbols for export
The symbols in the .ui files for the signal handlers and functions must be
exported so that the system can pick them up during execution.

Fixes .
2021-05-07 10:38:02 +08:00

245 lines
6.6 KiB
C

/* Spin Buttons
* #Keywords: GtkEntry
*
* 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>
G_MODULE_EXPORT int
spinbutton_hex_spin_input (GtkSpinButton *spin_button,
double *new_val)
{
const char *buf;
char *err;
double 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;
}
G_MODULE_EXPORT int
spinbutton_hex_spin_output (GtkSpinButton *spin_button)
{
GtkAdjustment *adjustment;
char *buf;
double 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", (int) 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;
}
G_MODULE_EXPORT int
spinbutton_time_spin_input (GtkSpinButton *spin_button,
double *new_val)
{
const char *text;
char **str;
gboolean found = FALSE;
int hours;
int minutes;
char *endh;
char *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;
}
G_MODULE_EXPORT int
spinbutton_time_spin_output (GtkSpinButton *spin_button)
{
GtkAdjustment *adjustment;
char *buf;
double hours;
double 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 const char *month[12] = {
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
};
G_MODULE_EXPORT int
spinbutton_month_spin_input (GtkSpinButton *spin_button,
double *new_val)
{
int i;
char *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 = (double) i;
return TRUE;
}
G_MODULE_EXPORT int
spinbutton_month_spin_output (GtkSpinButton *spin_button)
{
GtkAdjustment *adjustment;
double value;
int 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_from_resource ("/spinbutton/spinbutton.ui");
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_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&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_window_destroy (GTK_WINDOW (window));
return window;
}