static guint adjustment_signals[LAST_SIGNAL] = { 0 };
+static guint64 adjustment_changed_stamp = 0; /* protected by global gdk lock */
+
G_DEFINE_TYPE (GtkAdjustment, gtk_adjustment, GTK_TYPE_OBJECT)
static void
}
if (changed)
- gtk_adjustment_changed (GTK_ADJUSTMENT (object));
+ {
+ adjustment_changed_stamp++;
+ gtk_adjustment_changed (GTK_ADJUSTMENT (object));
+ }
}
GtkObject *
gdouble page_increment,
gdouble page_size)
{
- return g_object_new (GTK_TYPE_ADJUSTMENT,
+ return g_object_new (GTK_TYPE_ADJUSTMENT,
"lower", lower,
"upper", upper,
"step-increment", step_increment,
}
}
+/**
+ * gtk_adjustment_get_lower:
+ * @adjustment: a #GtkAdjustment
+ *
+ * Retrieves the minimum value of the adjustment.
+ *
+ * Return value: The current minimum value of the adjustment.
+ *
+ * Since: 2.14
+ **/
+gdouble
+gtk_adjustment_get_lower (GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
+
+ return adjustment->lower;
+}
+
+/**
+ * gtk_adjustment_set_lower:
+ * @adjustment: a #GtkAdjustment
+ * @lower: the new minimum value
+ *
+ * Sets the minimum value of the adjustment.
+ *
+ * When setting multiple adjustment properties via their individual
+ * setters, multiple "changed" signals will be emitted. However, since
+ * the emission of the "changed" signal is tied to the emission of the
+ * "GObject::notify" signals of the changed properties, it's possible
+ * to compress the "changed" signals into one by calling
+ * g_object_freeze_notify() and g_object_thaw_notify() around the
+ * calls to the individual setters.
+ *
+ * Alternatively, using a single g_object_set() for all the properties
+ * to change, or using gtk_adjustment_configure() has the same effect
+ * of compressing "changed" emissions.
+ *
+ * Since: 2.14
+ **/
+void
+gtk_adjustment_set_lower (GtkAdjustment *adjustment,
+ gdouble lower)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ if (lower != adjustment->lower)
+ g_object_set (adjustment, "lower", lower, NULL);
+}
+
+/**
+ * gtk_adjustment_get_upper:
+ * @adjustment: a #GtkAdjustment
+ *
+ * Retrieves the maximum value of the adjustment.
+ *
+ * Return value: The current maximum value of the adjustment.
+ *
+ * Since: 2.14
+ **/
+gdouble
+gtk_adjustment_get_upper (GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
+
+ return adjustment->upper;
+}
+
+/**
+ * gtk_adjustment_set_upper:
+ * @adjustment: a #GtkAdjustment
+ * @upper: the new maximum value
+ *
+ * Sets the maximum value of the adjustment.
+ *
+ * Note that values will be restricted by
+ * <literal>upper - page-size</literal> if the page-size
+ * property is nonzero.
+ *
+ * See gtk_adjustment_set_lower() about how to compress multiple
+ * emissions of the "changed" signal when setting multiple adjustment
+ * properties.
+ *
+ * Since: 2.14
+ **/
+void
+gtk_adjustment_set_upper (GtkAdjustment *adjustment,
+ gdouble upper)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ if (upper != adjustment->upper)
+ g_object_set (adjustment, "upper", upper, NULL);
+}
+
+/**
+ * gtk_adjustment_get_step_increment:
+ * @adjustment: a #GtkAdjustment
+ *
+ * Retrieves the step increment of the adjustment.
+ *
+ * Return value: The current step increment of the adjustment.
+ *
+ * Since: 2.14
+ **/
+gdouble
+gtk_adjustment_get_step_increment (GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
+
+ return adjustment->step_increment;
+}
+
+/**
+ * gtk_adjustment_set_step_increment:
+ * @adjustment: a #GtkAdjustment
+ * @step_increment: the new step increment
+ *
+ * Sets the step increment of the adjustment.
+ *
+ * See gtk_adjustment_set_lower() about how to compress multiple
+ * emissions of the "changed" signal when setting multiple adjustment
+ * properties.
+ *
+ * Since: 2.14
+ **/
+void
+gtk_adjustment_set_step_increment (GtkAdjustment *adjustment,
+ gdouble step_increment)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ if (step_increment != adjustment->step_increment)
+ g_object_set (adjustment, "step-increment", step_increment, NULL);
+}
+
+/**
+ * gtk_adjustment_get_page_increment:
+ * @adjustment: a #GtkAdjustment
+ *
+ * Retrieves the page increment of the adjustment.
+ *
+ * Return value: The current page increment of the adjustment.
+ *
+ * Since: 2.14
+ **/
+gdouble
+gtk_adjustment_get_page_increment (GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
+
+ return adjustment->page_increment;
+}
+
+/**
+ * gtk_adjustment_set_page_increment:
+ * @adjustment: a #GtkAdjustment
+ * @page_increment: the new page increment
+ *
+ * Sets the page increment of the adjustment.
+ *
+ * See gtk_adjustment_set_lower() about how to compress multiple
+ * emissions of the "changed" signal when setting multiple adjustment
+ * properties.
+ *
+ * Since: 2.14
+ **/
+void
+gtk_adjustment_set_page_increment (GtkAdjustment *adjustment,
+ gdouble page_increment)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ if (page_increment != adjustment->page_increment)
+ g_object_set (adjustment, "page-increment", page_increment, NULL);
+}
+
+/**
+ * gtk_adjustment_get_page_size:
+ * @adjustment: a #GtkAdjustment
+ *
+ * Retrieves the page size of the adjustment.
+ *
+ * Return value: The current page size of the adjustment.
+ *
+ * Since: 2.14
+ **/
+gdouble
+gtk_adjustment_get_page_size (GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
+
+ return adjustment->page_size;
+}
+
+/**
+ * gtk_adjustment_set_page_size:
+ * @adjustment: a #GtkAdjustment
+ * @page_size: the new page size
+ *
+ * Sets the page size of the adjustment.
+ *
+ * See gtk_adjustment_set_lower() about how to compress multiple
+ * emissions of the "changed" signal when setting multiple adjustment
+ * properties.
+ *
+ * Since: 2.14
+ **/
+void
+gtk_adjustment_set_page_size (GtkAdjustment *adjustment,
+ gdouble page_size)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ if (page_size != adjustment->page_size)
+ g_object_set (adjustment, "page-size", page_size, NULL);
+}
+
+/**
+ * gtk_adjustment_configure:
+ * @adjustment: a #GtkAdjustment
+ * @value: the new value
+ * @lower: the new minimum value
+ * @upper: the new maximum value
+ * @step_increment: the new step increment
+ * @page_increment: the new page increment
+ * @page_size: the new page size
+ *
+ * Sets all properties of the adjustment at once.
+ *
+ * Use this function to avoid multiple emissions of the "changed"
+ * signal. See gtk_adjustment_set_lower() for an alternative way
+ * of compressing multiple emissions of "changed" into one.
+ *
+ * Since: 2.14
+ **/
+void
+gtk_adjustment_configure (GtkAdjustment *adjustment,
+ gdouble value,
+ gdouble lower,
+ gdouble upper,
+ gdouble step_increment,
+ gdouble page_increment,
+ gdouble page_size)
+{
+ gboolean value_changed = FALSE;
+ guint64 old_stamp = adjustment_changed_stamp;
+
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ g_object_freeze_notify (G_OBJECT (adjustment));
+
+ g_object_set (adjustment,
+ "lower", lower,
+ "upper", upper,
+ "step-increment", step_increment,
+ "page-increment", page_increment,
+ "page-size", page_size,
+ NULL);
+
+ value = CLAMP (value, lower, upper - page_size);
+
+ if (value != adjustment->value)
+ {
+ /* set value manually to make sure "changed" is emitted with the
+ * new value in place and is emitted before "value-changed"
+ */
+ adjustment->value = value;
+ value_changed = TRUE;
+ }
+
+ g_object_thaw_notify (G_OBJECT (adjustment));
+
+ if (old_stamp == adjustment_changed_stamp)
+ gtk_adjustment_changed (adjustment); /* force emission before ::value-changed */
+
+ if (value_changed)
+ gtk_adjustment_value_changed (adjustment);
+}
+
void
gtk_adjustment_changed (GtkAdjustment *adjustment)
{
struct _GtkAdjustment
{
GtkObject parent_instance;
-
- gdouble lower;
- gdouble upper;
- gdouble value;
- gdouble step_increment;
- gdouble page_increment;
- gdouble page_size;
+
+ gdouble GSEAL (lower);
+ gdouble GSEAL (upper);
+ gdouble GSEAL (value);
+ gdouble GSEAL (step_increment);
+ gdouble GSEAL (page_increment);
+ gdouble GSEAL (page_size);
};
struct _GtkAdjustmentClass
{
GtkObjectClass parent_class;
-
+
void (* changed) (GtkAdjustment *adjustment);
void (* value_changed) (GtkAdjustment *adjustment);
-
+
/* Padding for future expansion */
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
gdouble step_increment,
gdouble page_increment,
gdouble page_size);
+
void gtk_adjustment_changed (GtkAdjustment *adjustment);
void gtk_adjustment_value_changed (GtkAdjustment *adjustment);
void gtk_adjustment_clamp_page (GtkAdjustment *adjustment,
gdouble lower,
gdouble upper);
+
gdouble gtk_adjustment_get_value (GtkAdjustment *adjustment);
void gtk_adjustment_set_value (GtkAdjustment *adjustment,
gdouble value);
+gdouble gtk_adjustment_get_lower (GtkAdjustment *adjustment);
+void gtk_adjustment_set_lower (GtkAdjustment *adjustment,
+ gdouble lower);
+gdouble gtk_adjustment_get_upper (GtkAdjustment *adjustment);
+void gtk_adjustment_set_upper (GtkAdjustment *adjustment,
+ gdouble upper);
+gdouble gtk_adjustment_get_step_increment (GtkAdjustment *adjustment);
+void gtk_adjustment_set_step_increment (GtkAdjustment *adjustment,
+ gdouble step_increment);
+gdouble gtk_adjustment_get_page_increment (GtkAdjustment *adjustment);
+void gtk_adjustment_set_page_increment (GtkAdjustment *adjustment,
+ gdouble page_increment);
+gdouble gtk_adjustment_get_page_size (GtkAdjustment *adjustment);
+void gtk_adjustment_set_page_size (GtkAdjustment *adjustment,
+ gdouble page_size);
+
+void gtk_adjustment_configure (GtkAdjustment *adjustment,
+ gdouble value,
+ gdouble lower,
+ gdouble upper,
+ gdouble step_increment,
+ gdouble page_increment,
+ gdouble page_size);
G_END_DECLS
projects / gtk4.git / commitdiff