/* gtkaccessiblerange.c: Accessible range interface
*
* SPDX - FileCopyrightText : 2022 Red Hat Inc .
* SPDX - License - Identifier : LGPL - 2 . 1 - or - later
*/
/**
* GtkAccessibleRange :
*
* An interface for accessible objects containing a numeric value .
*
* ` GtkAccessibleRange ` describes ranged controls for Assistive Technologies .
*
* Ranged controls have a single value within an allowed range that can
* optionally be changed by the user .
*
* This interface is expected to be implemented by controls using the
* following roles :
*
* - ` GTK_ACCESSIBLE_ROLE_METER `
* - ` GTK_ACCESSIBLE_ROLE_PROGRESS_BAR `
* - ` GTK_ACCESSIBLE_ROLE_SCROLLBAR `
* - ` GTK_ACCESSIBLE_ROLE_SLIDER `
* - ` GTK_ACCESSIBLE_ROLE_SPIN_BUTTON `
*
* If that is not the case , a warning will be issued at run time .
*
* In addition to this interface , its implementers are expected to provide the
* correct values for the following properties :
*
* - ` GTK_ACCESSIBLE_PROPERTY_VALUE_MAX `
* - ` GTK_ACCESSIBLE_PROPERTY_VALUE_MIN `
* - ` GTK_ACCESSIBLE_PROPERTY_VALUE_NOW `
* - ` GTK_ACCESSIBLE_PROPERTY_VALUE_TEXT `
*
* Since : 4 . 10
*/
#include "config.h"
#include "gtkaccessiblerangeprivate.h"
#include "gtkaccessibleprivate.h"
#include "gtkatcontextprivate.h"
#include "gtkaccessiblevalueprivate.h"
G_DEFINE_INTERFACE (GtkAccessibleRange, gtk_accessible_range, GTK_TYPE_ACCESSIBLE)
static gboolean
gtk_accessible_range_default_set_current_value (GtkAccessibleRange *accessible_range,
double value)
{
return TRUE ;
}
static void
gtk_accessible_range_default_init (GtkAccessibleRangeInterface *iface)
{
iface->set_current_value = gtk_accessible_range_default_set_current_value;
}
/*< private >
* gtk_accessible_range_set_current_value :
* @ self : a ` GtkAccessibleRange `
*
* Sets the current value of this ` GtkAccessibleRange ` to the given value
*
* Note that for some widgets implementing this interface , setting a value
* through the accessibility API makes no sense , so calling this function
* may in some cases do nothing
*
* Returns : true if the call changed the value , and false otherwise
*/
gboolean
gtk_accessible_range_set_current_value (GtkAccessibleRange *self, double value)
{
g_return_val_if_fail (GTK_IS_ACCESSIBLE_RANGE (self), FALSE );
GtkAccessibleRangeInterface *iface = GTK_ACCESSIBLE_RANGE_GET_IFACE (self);
return iface->set_current_value (self, value);
}
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