Using a GtkSpinButton to get an integer

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// Provides a function to retrieve an integer value from a GtkSpinButton
// and creates a spin button to model percentage values.

gint
grab_int_value (GtkSpinButton *button,
                gpointer       user_data)
{
  return gtk_spin_button_get_value_as_int (button);
}

void
create_integer_spin_button (void)
{

  GtkWidget *window, *button;
  GtkAdjustment *adjustment;

  adjustment = gtk_adjustment_new (50.0, 0.0, 100.0, 1.0, 5.0, 0.0);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_container_set_border_width (GTK_CONTAINER (window), 5);

  // creates the spinbutton, with no decimal places
  button = gtk_spin_button_new (adjustment, 1.0, 0);
  gtk_container_add (GTK_CONTAINER (window), button);

  gtk_widget_show_all (window);
}

Using a GtkSpinButton to get a floating point value

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// Provides a function to retrieve a floating point value from a
// GtkSpinButton, and creates a high precision spin button.

gfloat
grab_float_value (GtkSpinButton *button,
                  gpointer       user_data)
{
  return gtk_spin_button_get_value (button);
}

void
create_floating_spin_button (void)
{
  GtkWidget *window, *button;
  GtkAdjustment *adjustment;

  adjustment = gtk_adjustment_new (2.500, 0.0, 5.0, 0.001, 0.1, 0.0);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_container_set_border_width (GTK_CONTAINER (window), 5);

  // creates the spinbutton, with three decimal places
  button = gtk_spin_button_new (adjustment, 0.001, 3);
  gtk_container_add (GTK_CONTAINER (window), button);

  gtk_widget_show_all (window);
}

gtk_spin_button_configure ()

void
gtk_spin_button_configure (GtkSpinButton *spin_button,
                           GtkAdjustment *adjustment,
                           gdouble climb_rate,
                           guint digits);

Changes the properties of an existing spin button. The adjustment, climb rate, and number of decimal places are all changed accordingly, after this function call.

gtk_spin_button_new ()

GtkWidget *
gtk_spin_button_new (GtkAdjustment *adjustment,
                     gdouble climb_rate,
                     guint digits);

Creates a new GtkSpinButton.

gtk_spin_button_new_with_range ()

GtkWidget *
gtk_spin_button_new_with_range (gdouble min,
                                gdouble max,
                                gdouble step);

This is a convenience constructor that allows creation of a numeric GtkSpinButton without manually creating an adjustment. The value is initially set to the minimum value and a page increment of 10 * step is the default. The precision of the spin button is equivalent to the precision of step .

Note that the way in which the precision is derived works best if step is a power of ten. If the resulting precision is not suitable for your needs, use gtk_spin_button_set_digits() to correct it.

gtk_spin_button_set_adjustment ()

void
gtk_spin_button_set_adjustment (GtkSpinButton *spin_button,
                                GtkAdjustment *adjustment);

Replaces the GtkAdjustment associated with spin_button .

gtk_spin_button_get_adjustment ()

GtkAdjustment *
gtk_spin_button_get_adjustment (GtkSpinButton *spin_button);

Get the adjustment associated with a GtkSpinButton

gtk_spin_button_set_digits ()

void
gtk_spin_button_set_digits (GtkSpinButton *spin_button,
                            guint digits);

Set the precision to be displayed by spin_button . Up to 20 digit precision is allowed.

gtk_spin_button_set_increments ()

void
gtk_spin_button_set_increments (GtkSpinButton *spin_button,
                                gdouble step,
                                gdouble page);

Sets the step and page increments for spin_button. This affects how quickly the value changes when the spin button’s arrows are activated.

gtk_spin_button_set_range ()

void
gtk_spin_button_set_range (GtkSpinButton *spin_button,
                           gdouble min,
                           gdouble max);

Sets the minimum and maximum allowable values for spin_button .

If the current value is outside this range, it will be adjusted to fit within the range, otherwise it will remain unchanged.

gtk_spin_button_get_value_as_int ()

gint
gtk_spin_button_get_value_as_int (GtkSpinButton *spin_button);

Get the value spin_button represented as an integer.

gtk_spin_button_set_value ()

void
gtk_spin_button_set_value (GtkSpinButton *spin_button,
                           gdouble value);

Sets the value of spin_button .

gtk_spin_button_set_update_policy ()

void
gtk_spin_button_set_update_policy (GtkSpinButton *spin_button,
                                   GtkSpinButtonUpdatePolicy policy);

Sets the update behavior of a spin button. This determines whether the spin button is always updated or only when a valid value is set.

gtk_spin_button_set_numeric ()

void
gtk_spin_button_set_numeric (GtkSpinButton *spin_button,
                             gboolean numeric);

Sets the flag that determines if non-numeric text can be typed into the spin button.

gtk_spin_button_spin ()

void
gtk_spin_button_spin (GtkSpinButton *spin_button,
                      GtkSpinType direction,
                      gdouble increment);

Increment or decrement a spin button’s value in a specified direction by a specified amount.

gtk_spin_button_set_wrap ()

void
gtk_spin_button_set_wrap (GtkSpinButton *spin_button,
                          gboolean wrap);

Sets the flag that determines if a spin button value wraps around to the opposite limit when the upper or lower limit of the range is exceeded.

gtk_spin_button_set_snap_to_ticks ()

void
gtk_spin_button_set_snap_to_ticks (GtkSpinButton *spin_button,
                                   gboolean snap_to_ticks);

Sets the policy as to whether values are corrected to the nearest step increment when a spin button is activated after providing an invalid value.

gtk_spin_button_update ()

void
gtk_spin_button_update (GtkSpinButton *spin_button);

Manually force an update of the spin button.

gtk_spin_button_get_digits ()

guint
gtk_spin_button_get_digits (GtkSpinButton *spin_button);

Fetches the precision of spin_button . See gtk_spin_button_set_digits().

gtk_spin_button_get_increments ()

void
gtk_spin_button_get_increments (GtkSpinButton *spin_button,
                                gdouble *step,
                                gdouble *page);

Gets the current step and page the increments used by spin_button . See gtk_spin_button_set_increments().

gtk_spin_button_get_numeric ()

gboolean
gtk_spin_button_get_numeric (GtkSpinButton *spin_button);

Returns whether non-numeric text can be typed into the spin button. See gtk_spin_button_set_numeric().

gtk_spin_button_get_range ()

void
gtk_spin_button_get_range (GtkSpinButton *spin_button,
                           gdouble *min,
                           gdouble *max);

Gets the range allowed for spin_button . See gtk_spin_button_set_range().

gtk_spin_button_get_snap_to_ticks ()

gboolean
gtk_spin_button_get_snap_to_ticks (GtkSpinButton *spin_button);

Returns whether the values are corrected to the nearest step. See gtk_spin_button_set_snap_to_ticks().

gtk_spin_button_get_update_policy ()

GtkSpinButtonUpdatePolicy
gtk_spin_button_get_update_policy (GtkSpinButton *spin_button);

Gets the update behavior of a spin button. See gtk_spin_button_set_update_policy().

gtk_spin_button_get_value ()

gdouble
gtk_spin_button_get_value (GtkSpinButton *spin_button);

Get the value in the spin_button .

gtk_spin_button_get_wrap ()

gboolean
gtk_spin_button_get_wrap (GtkSpinButton *spin_button);

Returns whether the spin button’s value wraps around to the opposite limit when the upper or lower limit of the range is exceeded. See gtk_spin_button_set_wrap().

struct GtkSpinButton

struct GtkSpinButton;

The GtkSpinButton contains only private data and should not be directly modified.

enum GtkSpinButtonUpdatePolicy

The spin button update policy determines whether the spin button displays values even if they are outside the bounds of its adjustment. See gtk_spin_button_set_update_policy().

enum GtkSpinType

The values of the GtkSpinType enumeration are used to specify the change to make in gtk_spin_button_spin().

GTK_INPUT_ERROR

#define GTK_INPUT_ERROR -1

Constant to return from a signal handler for the “input” signal in case of conversion failure.

The “adjustment” property

  “adjustment”               GtkAdjustment *

The adjustment that holds the value of the spin button.

Flags: Read / Write

The “climb-rate” property

  “climb-rate”               gdouble

The acceleration rate when you hold down a button.

Flags: Read / Write

Allowed values: >= 0

Default value: 0

The “digits” property

  “digits”                   guint

The number of decimal places to display.

Flags: Read / Write

Allowed values: <= 20

Default value: 0

The “numeric” property

  “numeric”                  gboolean

Whether non-numeric characters should be ignored.

Flags: Read / Write

Default value: FALSE

The “snap-to-ticks” property

  “snap-to-ticks”            gboolean

Whether erroneous values are automatically changed to a spin button's nearest step increment.

Flags: Read / Write

Default value: FALSE

The “update-policy” property

  “update-policy”            GtkSpinButtonUpdatePolicy

Whether the spin button should update always, or only when the value is legal.

Flags: Read / Write

Default value: GTK_UPDATE_ALWAYS

The “value” property

  “value”                    gdouble

Reads the current value, or sets a new value.

Flags: Read / Write

Default value: 0

The “wrap” property

  “wrap”                     gboolean

Whether a spin button should wrap upon reaching its limits.

Flags: Read / Write

Default value: FALSE

The “shadow-type” style property

  “shadow-type”              GtkShadowType

Style of bevel around the spin button.

Flags: Read

Default value: GTK_SHADOW_IN

The “change-value” signal

void
user_function (GtkSpinButton *spin_button,
               GtkScrollType  scroll,
               gpointer       user_data)

The ::change-value signal is a keybinding signal which gets emitted when the user initiates a value change.

Applications should not connect to it, but may emit it with g_signal_emit_by_name() if they need to control the cursor programmatically.

The default bindings for this signal are Up/Down and PageUp and/PageDown.

Flags: Action

The “input” signal

gint
user_function (GtkSpinButton *spin_button,
               gpointer       new_value,
               gpointer       user_data)

The ::input signal can be used to influence the conversion of the users input into a double value. The signal handler is expected to use gtk_entry_get_text() to retrieve the text of the entry and set new_value to the new value.

The default conversion uses g_strtod().

Flags: Run Last

The “output” signal

gboolean
user_function (GtkSpinButton *spin_button,
               gpointer       user_data)

The ::output signal can be used to change to formatting of the value that is displayed in the spin buttons entry.

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// show leading zeros
static gboolean
on_output (GtkSpinButton *spin,
           gpointer       data)
{
   GtkAdjustment *adjustment;
   gchar *text;
   int value;

   adjustment = gtk_spin_button_get_adjustment (spin);
   value = (int)gtk_adjustment_get_value (adjustment);
   text = g_strdup_printf ("%02d", value);
   gtk_entry_set_text (GTK_ENTRY (spin), text);
   g_free (text);

   return TRUE;
}

Flags: Run Last

The “value-changed” signal

void
user_function (GtkSpinButton *spin_button,
               gpointer       user_data)

The ::value-changed signal is emitted when the value represented by spinbutton changes. Also see the “output” signal.

Flags: Run Last

The “wrapped” signal

void
user_function (GtkSpinButton *spin_button,
               gpointer       user_data)

The ::wrapped signal is emitted right after the spinbutton wraps from its maximum to minimum value or vice-versa.

Flags: Run Last

Since 2.10