GtkScaleButton

GtkScaleButton — A button which pops up a scale

Synopsis


#include <gtk/gtk.h>

                    GtkScaleButton;
GtkWidget*          gtk_scale_button_new                (GtkIconSize size,
                                                         gdouble min,
                                                         gdouble max,
                                                         gdouble step,
                                                         const gchar **icons);
void                gtk_scale_button_set_adjustment     (GtkScaleButton *button,
                                                         GtkAdjustment *adjustment);
void                gtk_scale_button_set_icons          (GtkScaleButton *button,
                                                         const gchar **icons);
void                gtk_scale_button_set_value          (GtkScaleButton *button,
                                                         gdouble value);
GtkAdjustment*      gtk_scale_button_get_adjustment     (GtkScaleButton *button);
gdouble             gtk_scale_button_get_value          (GtkScaleButton *button);

Object Hierarchy

  GObject
   +----GInitiallyUnowned
         +----GtkObject
               +----GtkWidget
                     +----GtkContainer
                           +----GtkBin
                                 +----GtkButton
                                       +----GtkScaleButton
                                             +----GtkVolumeButton

Implemented Interfaces

GtkScaleButton implements AtkImplementorIface and GtkBuildable.

Properties

  "adjustment"               GtkAdjustment*        : Read / Write
  "icons"                    GStrv*                : Read / Write
  "size"                     GtkIconSize           : Read / Write
  "value"                    gdouble               : Read / Write

Signals

  "popdown"                                        : Run Last / Action
  "popup"                                          : Run Last / Action
  "value-changed"                                  : Run Last

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.

Details

GtkScaleButton

typedef struct _GtkScaleButton GtkScaleButton;

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.

size : a stock icon size
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()
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.

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.

button : a GtkScaleButton
icons : a NULL-terminated array of icon names

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.

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.

button : a GtkScaleButton
Returns : the adjustment associated with the scale

Since 2.12

gtk_scale_button_get_value ()

gdouble             gtk_scale_button_get_value          (GtkScaleButton *button);

Gets the current value of the scale button.

button : a GtkScaleButton
Returns : current value of the scale button

Since 2.12

Property Details

The "adjustment" property

  "adjustment"               GtkAdjustment*        : Read / Write

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

The "icons" property

  "icons"                    GStrv*                : Read / Write

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.

Since 2.12

The "size" property

  "size"                     GtkIconSize           : Read / Write

The icon size.

Default value: GTK_ICON_SIZE_SMALL_TOOLBAR

The "value" property

  "value"                    gdouble               : Read / Write

The value of the scale.

Default value: 0

Signal Details

The "popdown" signal

void                user_function                      (GtkScaleButton *button,
                                                        gpointer        user_data)      : Run Last / Action

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

The default binding for this signal is Escape.

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

Since 2.12

The "popup" signal

void                user_function                      (GtkScaleButton *button,
                                                        gpointer        user_data)      : Run Last / Action

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.

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

Since 2.12

The "value-changed" signal

void                user_function                      (GtkScaleButton *button,
                                                        gdouble         value,
                                                        gpointer        user_data)      : Run Last

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

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

Since 2.12

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