GtkScaleButton: GTK+ 3 Reference Manual

## GtkScaleButton GtkScaleButton — A button which pops up a scale |

## Functions

GtkWidget * | gtk_scale_button_new ()
void | gtk_scale_button_set_adjustment ()
void | gtk_scale_button_set_icons ()
void | gtk_scale_button_set_value ()
GtkAdjustment * | gtk_scale_button_get_adjustment ()
gdouble | gtk_scale_button_get_value ()
GtkWidget * | gtk_scale_button_get_popup ()
GtkWidget * | gtk_scale_button_get_plus_button ()
GtkWidget * | gtk_scale_button_get_minus_button ()

## Properties

GtkAdjustment * | adjustment | Read / Write
GStrv | icons | Read / Write
GtkIconSize | size | Read / Write
double | value | Read / Write

## Signals

void | popdown | Action
void | popup | Action
void | value-changed | Run Last

## Types and Values

struct | GtkScaleButton

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── GtkWidget
                ╰── GtkContainer
                    ╰── GtkBin
                        ╰── GtkButton
                            ╰── GtkScaleButton
                                ╰── GtkVolumeButton

## Implemented Interfaces

GtkScaleButton implements AtkImplementorIface, GtkBuildable, GtkActionable, GtkActivatable and GtkOrientable.

## Includes

    #include <gtk/gtk.h>

## Description

GtkScaleButton provides a button which pops up a scale widget. This kind of widget is commonly used for volume controls in multimedia applications, and GTK+ provides a GtkVolumeButton subclass that is tailored for this use case.

### CSS nodes

GtkScaleButton has a single CSS node with name button. To differentiate it from a plain GtkButton, it gets the .scale style class.

The popup widget that contains the scale has a .scale-popup style class.

## Functions

### gtk_scale_button_new ()

    GtkWidget *
    gtk_scale_button_new (GtkIconSize size,
                          gdouble min,
                          gdouble max,
                          gdouble step,
                          const gchar **icons);

Creates a GtkScaleButton, with a range between `min` and `max` , with a stepping of `step` .

#### Parameters

size | a stock icon size (GtkIconSize). | [type int]
min | the minimum value of the scale (usually 0) |
max | the maximum value of the scale (usually 100) |
step | the stepping of value when a scroll-wheel event, or up/down arrow event occurs (usually 2) |
icons | a `NULL`-terminated array of icon names, or `NULL` if you want to set the list later with `gtk_scale_button_set_icons()`. | [allow-none][array zero-terminated=1]

#### Returns

a new GtkScaleButton

Since: 2.12

### gtk_scale_button_set_adjustment ()

    void
    gtk_scale_button_set_adjustment (GtkScaleButton *button,
                                     GtkAdjustment *adjustment);

Sets the GtkAdjustment to be used as a model for the GtkScaleButton’s scale. See `gtk_range_set_adjustment()` for details.

#### Parameters

button | a GtkScaleButton |
adjustment | a GtkAdjustment |

Since: 2.12

### gtk_scale_button_set_icons ()

    void
    gtk_scale_button_set_icons (GtkScaleButton *button,
                                const gchar **icons);

Sets the icons to be used by the scale button. For details, see the “icons” property.

#### Parameters

button | a GtkScaleButton |
icons | a `NULL`-terminated array of icon names. | [array zero-terminated=1]

Since: 2.12

### gtk_scale_button_set_value ()

    void
    gtk_scale_button_set_value (GtkScaleButton *button,
                                gdouble value);

Sets the current value of the scale; if the value is outside the minimum or maximum range values, it will be clamped to fit inside them. The scale button emits the “value-changed” signal if the value changes.

#### Parameters

button | a GtkScaleButton |
value | new value of the scale button |

Since: 2.12

### gtk_scale_button_get_adjustment ()

    GtkAdjustment *
    gtk_scale_button_get_adjustment (GtkScaleButton *button);

Gets the GtkAdjustment associated with the GtkScaleButton’s scale. See `gtk_range_get_adjustment()` for details.

#### Parameters

button | a GtkScaleButton |

#### Returns

the adjustment associated with the scale.

[transfer none]

Since: 2.12

### gtk_scale_button_get_value ()

    gdouble
    gtk_scale_button_get_value (GtkScaleButton *button);

Gets the current value of the scale button.

#### Parameters

button | a GtkScaleButton |

#### Returns

current value of the scale button

Since: 2.12

### gtk_scale_button_get_popup ()

    GtkWidget *
    gtk_scale_button_get_popup (GtkScaleButton *button);

Retrieves the popup of the GtkScaleButton.

#### Parameters

button | a GtkScaleButton |

#### Returns

the popup of the GtkScaleButton.

[transfer none]

Since: 2.14

### gtk_scale_button_get_plus_button ()

    GtkWidget *
    gtk_scale_button_get_plus_button (GtkScaleButton *button);

Retrieves the plus button of the GtkScaleButton.

#### Parameters

button | a GtkScaleButton |

#### Returns

the plus button of the GtkScaleButton as a GtkButton.

[transfer none][type Gtk.Button]

Since: 2.14

### gtk_scale_button_get_minus_button ()

    GtkWidget *
    gtk_scale_button_get_minus_button (GtkScaleButton *button);

Retrieves the minus button of the GtkScaleButton.

#### Parameters

button | a GtkScaleButton |

#### Returns

the minus button of the GtkScaleButton as a GtkButton.

[transfer none][type Gtk.Button]

Since: 2.14

## Types and Values

### struct GtkScaleButton

    struct GtkScaleButton;

## Property Details

### The `“adjustment”` property

      “adjustment”               GtkAdjustment *

The GtkAdjustment that contains the current value of this scale button object.

Owner: GtkScaleButton

Flags: Read / Write

### The `“icons”` property

      “icons”                    GStrv

The names of the icons to be used by the scale button. The first item in the array will be used in the button when the current value is the lowest value, the second item for the highest value. All the subsequent icons will be used for all the other values, spread evenly over the range of values.

If there's only one icon name in the `icons` array, it will be used for all the values. If only two icon names are in the `icons` array, the first one will be used for the bottom 50% of the scale, and the second one for the top 50%.

It is recommended to use at least 3 icons so that the GtkScaleButton reflects the current value of the scale better for the users.

Owner: GtkScaleButton

Flags: Read / Write

Since: 2.12

### The `“size”` property

      “size”                     GtkIconSize

The icon size.

Owner: GtkScaleButton

Flags: Read / Write

Default value: GTK_ICON_SIZE_SMALL_TOOLBAR

### The `“value”` property

      “value”                    double

The value of the scale.

Owner: GtkScaleButton

Flags: Read / Write

Default value: 0

## Signal Details

### The `“popdown”` signal

    void
    user_function (GtkScaleButton *button,
                   gpointer        user_data)

The ::popdown signal is a keybinding signal which gets emitted to popdown the scale widget.

The default binding for this signal is Escape.

#### Parameters

button | the object which received the signal |
user_data | user data set when the signal handler was connected. |

Flags: Action

Since: 2.12

### The `“popup”` signal

    void
    user_function (GtkScaleButton *button,
                   gpointer        user_data)

The ::popup signal is a keybinding signal which gets emitted to popup the scale widget.

The default bindings for this signal are Space, Enter and Return.

#### Parameters

button | the object which received the signal |
user_data | user data set when the signal handler was connected. |

Flags: Action

Since: 2.12

### The `“value-changed”` signal

    void
    user_function (GtkScaleButton *button,
                   double          value,
                   gpointer        user_data)

The ::value-changed signal is emitted when the value field has changed.

#### Parameters

button | the object which received the signal |
value | the new value |
user_data | user data set when the signal handler was connected. |

Flags: Run Last

Since: 2.12