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40d3b30770
Under circumstances I haven't fully tracked down, these demos refuse to run, failing to locate their callbacks. So use the machinery we have, and set up a GtkBuilderCScope for each of the problematic cases.
256 lines
7.4 KiB
C
256 lines
7.4 KiB
C
/* Spin Buttons
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* #Keywords: GtkEntry
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*
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* GtkSpinButton provides convenient ways to input data
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* that can be seen as a value in a range. The examples
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* here show that this does not necessarily mean numeric
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* values, and it can include custom formatting.
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*/
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#include <glib/gi18n.h>
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#include <gtk/gtk.h>
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#include <math.h>
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#include <stdlib.h>
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G_MODULE_EXPORT int
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spinbutton_hex_spin_input (GtkSpinButton *spin_button,
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double *new_val)
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{
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const char *buf;
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char *err;
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double res;
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buf = gtk_editable_get_text (GTK_EDITABLE (spin_button));
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res = strtol (buf, &err, 16);
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*new_val = res;
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if (*err)
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return GTK_INPUT_ERROR;
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else
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return TRUE;
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}
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G_MODULE_EXPORT int
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spinbutton_hex_spin_output (GtkSpinButton *spin_button)
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{
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GtkAdjustment *adjustment;
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char *buf;
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double val;
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adjustment = gtk_spin_button_get_adjustment (spin_button);
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val = gtk_adjustment_get_value (adjustment);
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if (fabs (val) < 1e-5)
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buf = g_strdup ("0x00");
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else
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buf = g_strdup_printf ("0x%.2X", (int) val);
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if (strcmp (buf, gtk_editable_get_text (GTK_EDITABLE (spin_button))))
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gtk_editable_set_text (GTK_EDITABLE (spin_button), buf);
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g_free (buf);
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return TRUE;
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}
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G_MODULE_EXPORT int
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spinbutton_time_spin_input (GtkSpinButton *spin_button,
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double *new_val)
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{
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const char *text;
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char **str;
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gboolean found = FALSE;
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int hours;
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int minutes;
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char *endh;
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char *endm;
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text = gtk_editable_get_text (GTK_EDITABLE (spin_button));
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str = g_strsplit (text, ":", 2);
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if (g_strv_length (str) == 2)
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{
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hours = strtol (str[0], &endh, 10);
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minutes = strtol (str[1], &endm, 10);
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if (!*endh && !*endm &&
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0 <= hours && hours < 24 &&
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0 <= minutes && minutes < 60)
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{
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*new_val = hours * 60 + minutes;
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found = TRUE;
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}
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}
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g_strfreev (str);
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if (!found)
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{
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*new_val = 0.0;
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return GTK_INPUT_ERROR;
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}
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return TRUE;
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}
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G_MODULE_EXPORT int
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spinbutton_time_spin_output (GtkSpinButton *spin_button)
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{
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GtkAdjustment *adjustment;
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char *buf;
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double hours;
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double minutes;
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adjustment = gtk_spin_button_get_adjustment (spin_button);
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hours = gtk_adjustment_get_value (adjustment) / 60.0;
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minutes = (hours - floor (hours)) * 60.0;
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buf = g_strdup_printf ("%02.0f:%02.0f", floor (hours), floor (minutes + 0.5));
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if (strcmp (buf, gtk_editable_get_text (GTK_EDITABLE (spin_button))))
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gtk_editable_set_text (GTK_EDITABLE (spin_button), buf);
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g_free (buf);
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return TRUE;
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}
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static const char *month[12] = {
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"January",
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"February",
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"March",
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"April",
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"May",
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"June",
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"July",
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"August",
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"September",
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"October",
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"November",
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"December"
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};
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G_MODULE_EXPORT int
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spinbutton_month_spin_input (GtkSpinButton *spin_button,
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double *new_val)
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{
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int i;
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char *tmp1, *tmp2;
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gboolean found = FALSE;
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for (i = 1; i <= 12; i++)
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{
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tmp1 = g_ascii_strup (month[i - 1], -1);
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tmp2 = g_ascii_strup (gtk_editable_get_text (GTK_EDITABLE (spin_button)), -1);
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if (strstr (tmp1, tmp2) == tmp1)
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found = TRUE;
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g_free (tmp1);
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g_free (tmp2);
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if (found)
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break;
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}
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if (!found)
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{
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*new_val = 0.0;
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return GTK_INPUT_ERROR;
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}
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*new_val = (double) i;
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return TRUE;
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}
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G_MODULE_EXPORT int
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spinbutton_month_spin_output (GtkSpinButton *spin_button)
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{
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GtkAdjustment *adjustment;
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double value;
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int i;
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adjustment = gtk_spin_button_get_adjustment (spin_button);
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value = gtk_adjustment_get_value (adjustment);
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for (i = 1; i <= 12; i++)
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if (fabs (value - (double)i) < 1e-5)
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{
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if (strcmp (month[i-1], gtk_editable_get_text (GTK_EDITABLE (spin_button))))
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gtk_editable_set_text (GTK_EDITABLE (spin_button), month[i-1]);
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}
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return TRUE;
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}
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static gboolean
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value_to_label (GBinding *binding,
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const GValue *from,
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GValue *to,
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gpointer user_data)
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{
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g_value_take_string (to, g_strdup_printf ("%g", g_value_get_double (from)));
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return TRUE;
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}
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GtkWidget *
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do_spinbutton (GtkWidget *do_widget)
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{
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static GtkWidget *window;
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if (!window)
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{
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GtkBuilder *builder;
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GtkBuilderScope *scope;
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GtkAdjustment *adj;
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GtkWidget *label;
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scope = gtk_builder_cscope_new ();
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builder = gtk_builder_new ();
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gtk_builder_cscope_add_callback (GTK_BUILDER_CSCOPE (scope), spinbutton_hex_spin_input);
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gtk_builder_cscope_add_callback (GTK_BUILDER_CSCOPE (scope), spinbutton_hex_spin_output);
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gtk_builder_cscope_add_callback (GTK_BUILDER_CSCOPE (scope), spinbutton_time_spin_input);
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gtk_builder_cscope_add_callback (GTK_BUILDER_CSCOPE (scope), spinbutton_time_spin_output);
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gtk_builder_cscope_add_callback (GTK_BUILDER_CSCOPE (scope), spinbutton_month_spin_input);
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gtk_builder_cscope_add_callback (GTK_BUILDER_CSCOPE (scope), spinbutton_month_spin_output);
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gtk_builder_set_scope (builder, scope);
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gtk_builder_add_from_resource (builder, "/spinbutton/spinbutton.ui", NULL);
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window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
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gtk_window_set_display (GTK_WINDOW (window),
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gtk_widget_get_display (do_widget));
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gtk_window_set_title (GTK_WINDOW (window), "Spin Buttons");
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gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "basic_adjustment"));
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label = GTK_WIDGET (gtk_builder_get_object (builder, "basic_label"));
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g_object_bind_property_full (adj, "value",
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label, "label",
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G_BINDING_SYNC_CREATE,
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value_to_label,
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NULL,
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NULL, NULL);
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adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "hex_adjustment"));
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label = GTK_WIDGET (gtk_builder_get_object (builder, "hex_label"));
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g_object_bind_property_full (adj, "value",
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label, "label",
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G_BINDING_SYNC_CREATE,
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value_to_label,
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NULL,
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NULL, NULL);
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adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "time_adjustment"));
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label = GTK_WIDGET (gtk_builder_get_object (builder, "time_label"));
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g_object_bind_property_full (adj, "value",
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label, "label",
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G_BINDING_SYNC_CREATE,
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value_to_label,
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NULL,
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NULL, NULL);
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adj = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "month_adjustment"));
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label = GTK_WIDGET (gtk_builder_get_object (builder, "month_label"));
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g_object_bind_property_full (adj, "value",
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label, "label",
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G_BINDING_SYNC_CREATE,
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value_to_label,
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NULL,
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NULL, NULL);
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g_object_unref (builder);
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g_object_unref (scope);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_set_visible (window, TRUE);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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