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125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/* Error States
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*
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* GtkLabel and GtkEntry can indicate errors if you set the .error
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* style class on them.
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*
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* This examples shows how this can be used in a dialog for input validation.
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*
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* It also shows how pass callbacks and objects to GtkBuilder with
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* GtkBuilderScope and gtk_builder_expose_object().
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*/
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#include <glib/gi18n.h>
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#include <gtk/gtk.h>
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static void
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validate_more_details (GtkEntry *entry,
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GParamSpec *pspec,
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GtkEntry *details)
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{
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if (strlen (gtk_editable_get_text (GTK_EDITABLE (entry))) > 0 &&
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strlen (gtk_editable_get_text (GTK_EDITABLE (details))) == 0)
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{
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gtk_widget_set_tooltip_text (GTK_WIDGET (entry), "Must have details first");
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gtk_widget_add_css_class (GTK_WIDGET (entry), "error");
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}
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else
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{
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gtk_widget_set_tooltip_text (GTK_WIDGET (entry), "");
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gtk_widget_remove_css_class (GTK_WIDGET (entry), "error");
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}
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}
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static gboolean
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mode_switch_state_set (GtkSwitch *sw,
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gboolean state,
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GtkWidget *scale)
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{
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GtkWidget *label;
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label = GTK_WIDGET (g_object_get_data (G_OBJECT (sw), "error_label"));
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if (!state ||
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(gtk_range_get_value (GTK_RANGE (scale)) > 50))
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{
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gtk_widget_hide (label);
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gtk_switch_set_state (sw, state);
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}
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else
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{
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gtk_widget_show (label);
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}
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return TRUE;
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}
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static void
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level_scale_value_changed (GtkRange *range,
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GtkWidget *sw)
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{
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GtkWidget *label;
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label = GTK_WIDGET (g_object_get_data (G_OBJECT (sw), "error_label"));
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if (gtk_switch_get_active (GTK_SWITCH (sw)) &&
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!gtk_switch_get_state (GTK_SWITCH (sw)) &&
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(gtk_range_get_value (range) > 50))
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{
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gtk_widget_hide (label);
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gtk_switch_set_state (GTK_SWITCH (sw), TRUE);
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}
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else if (gtk_switch_get_state (GTK_SWITCH (sw)) &&
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(gtk_range_get_value (range) <= 50))
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{
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gtk_switch_set_state (GTK_SWITCH (sw), FALSE);
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}
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}
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GtkWidget *
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do_errorstates (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *toplevel;
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GtkBuilder *builder;
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GtkBuilderScope *scope;
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GtkWidget *sw, *label;
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toplevel = GTK_WIDGET (gtk_widget_get_root (do_widget));
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scope = gtk_builder_cscope_new ();
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gtk_builder_cscope_add_callback_symbols (GTK_BUILDER_CSCOPE (scope),
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"validate_more_details", G_CALLBACK (validate_more_details),
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"mode_switch_state_set", G_CALLBACK (mode_switch_state_set),
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"level_scale_value_changed", G_CALLBACK (level_scale_value_changed),
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NULL);
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builder = gtk_builder_new ();
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gtk_builder_set_scope (builder, scope);
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gtk_builder_expose_object (builder, "toplevel", G_OBJECT (toplevel));
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gtk_builder_add_from_resource (builder, "/errorstates/errorstates.ui", NULL);
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window = GTK_WIDGET (gtk_builder_get_object (builder, "dialog"));
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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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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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sw = GTK_WIDGET (gtk_builder_get_object (builder, "mode_switch"));
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label = GTK_WIDGET (gtk_builder_get_object (builder, "error_label"));
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g_object_set_data (G_OBJECT (sw), "error_label", label);
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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_show (window);
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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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