gtk_scale_set_digits ()

void
gtk_scale_set_digits (GtkScale *scale,
                      gint digits);

Sets the number of decimal places that are displayed in the value. Also causes the value of the adjustment to be rounded to this number of digits, so the retrieved value matches the displayed one, if “draw-value” is TRUE when the value changes. If you want to enforce rounding the value when “draw-value” is FALSE, you can set “round-digits” instead.

gtk_scale_set_draw_value ()

void
gtk_scale_set_draw_value (GtkScale *scale,
                          gboolean draw_value);

Specifies whether the current value is displayed as a string next to the slider.

gtk_scale_set_value_pos ()

void
gtk_scale_set_value_pos (GtkScale *scale,
                         GtkPositionType pos);

Sets the position in which the current value is displayed.

gtk_scale_get_digits ()

gint
gtk_scale_get_digits (GtkScale *scale);

Gets the number of decimal places that are displayed in the value.

gtk_scale_get_draw_value ()

gboolean
gtk_scale_get_draw_value (GtkScale *scale);

Returns whether the current value is displayed as a string next to the slider.

gtk_scale_get_value_pos ()

GtkPositionType
gtk_scale_get_value_pos (GtkScale *scale);

Gets the position in which the current value is displayed.

gtk_scale_get_layout ()

PangoLayout *
gtk_scale_get_layout (GtkScale *scale);

Gets the PangoLayout used to display the scale. The returned object is owned by the scale so does not need to be freed by the caller.

Since: 2.4

gtk_scale_get_layout_offsets ()

void
gtk_scale_get_layout_offsets (GtkScale *scale,
                              gint *x,
                              gint *y);

Obtains the coordinates where the scale will draw the PangoLayout representing the text in the scale. Remember when using the PangoLayout function you need to convert to and from pixels using PANGO_PIXELS() or PANGO_SCALE.

If the “draw-value” property is FALSE, the return values are undefined.

Since: 2.4

gtk_scale_add_mark ()

void
gtk_scale_add_mark (GtkScale *scale,
                    gdouble value,
                    GtkPositionType position,
                    const gchar *markup);

Adds a mark at value .

A mark is indicated visually by drawing a tick mark next to the scale, and GTK+ makes it easy for the user to position the scale exactly at the marks value.

If markup is not NULL, text is shown next to the tick mark.

To remove marks from a scale, use gtk_scale_clear_marks().

Since: 2.16

gtk_scale_clear_marks ()

void
gtk_scale_clear_marks (GtkScale *scale);

Removes any marks that have been added with gtk_scale_add_mark().

Since: 2.16

struct GtkScale

struct GtkScale;

The “digits” property

  “digits”                   int

The number of decimal places that are displayed in the value.

Owner: GtkScale

Flags: Read / Write

Allowed values: [-1,64]

Default value: 1

The “draw-value” property

  “draw-value”               gboolean

Whether the current value is displayed as a string next to the slider.

Owner: GtkScale

Flags: Read / Write

Default value: TRUE

The “value-pos” property

  “value-pos”                GtkPositionType

The position in which the current value is displayed.

Owner: GtkScale

Flags: Read / Write

Default value: GTK_POS_TOP

The “slider-length” style property

  “slider-length”            int

Length of scale's slider.

Owner: GtkScale

Flags: Read

Allowed values: >= 0

Default value: 31

The “value-spacing” style property

  “value-spacing”            int

Space between value text and the slider/trough area.

Owner: GtkScale

Flags: Read

Allowed values: >= 0

Default value: 2

The “format-value” signal

char*
user_function (GtkScale *scale,
               double    value,
               gpointer  user_data)

Signal which allows you to change how the scale value is displayed. Connect a signal handler which returns an allocated string representing value . That string will then be used to display the scale's value.

If no user-provided handlers are installed, the value will be displayed on its own, rounded according to the value of the “digits” property.

Here's an example signal handler which displays a value 1.0 as with "-->1.0<--".

1
2
3
4
5
6
7

static gchar*
format_value_callback (GtkScale *scale,
                       gdouble   value)
{
  return g_strdup_printf ("-->%0.*g<--",
                          gtk_scale_get_digits (scale), value);
 }

Flags: Run Last