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December 12, 2021 15:35
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Spinbutton example
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| #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_entry_get_text (GTK_ENTRY (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; | |
| gint val; | |
| adjustment = gtk_spin_button_get_adjustment (spin_button); | |
| val = (gint) gtk_adjustment_get_value (adjustment); | |
| if (fabs (val) < 1e-5) | |
| buf = g_strdup ("0x00"); | |
| else | |
| buf = g_strdup_printf ("0x%.2X", val); | |
| if (strcmp (buf, gtk_entry_get_text (GTK_ENTRY (spin_button)))) | |
| gtk_entry_set_text (GTK_ENTRY (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_entry_get_text (GTK_ENTRY (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_entry_get_text (GTK_ENTRY (spin_button)))) | |
| gtk_entry_set_text (GTK_ENTRY (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_entry_get_text (GTK_ENTRY (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_entry_get_text (GTK_ENTRY (spin_button)))) | |
| gtk_entry_set_text (GTK_ENTRY (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"); | |
| 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_connect_signals (builder, NULL); | |
| window = GTK_WIDGET (gtk_builder_get_object (builder, "window")); | |
| gtk_window_set_screen (GTK_WINDOW (window), | |
| gtk_widget_get_screen (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_all (window); | |
| else | |
| gtk_widget_destroy (window); | |
| return window; | |
| } |
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