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