GTK+ 3 Reference Manual: GtkRevealer

## GtkRevealer GtkRevealer — Hide and show with animation |

## Synopsis

    #include <gtk/gtk.h>

    struct              GtkRevealer;
    GtkWidget *         gtk_revealer_new                    (void);
    gboolean            gtk_revealer_get_reveal_child       (GtkRevealer *revealer);
    void                gtk_revealer_set_reveal_child       (GtkRevealer *revealer,
                                                             gboolean reveal_child);
    gboolean            gtk_revealer_get_child_revealed     (GtkRevealer *revealer);
    guint               gtk_revealer_get_transition_duration
                                                            (GtkRevealer *revealer);
    void                gtk_revealer_set_transition_duration
                                                            (GtkRevealer *revealer,
                                                             guint duration);
    enum                GtkRevealerTransitionType;
    GtkRevealerTransitionType gtk_revealer_get_transition_type
                                                            (GtkRevealer *revealer);
    void                gtk_revealer_set_transition_type    (GtkRevealer *revealer,
                                                             GtkRevealerTransitionType transition);

## Object Hierarchy

      GObject
       +----GInitiallyUnowned
             +----GtkWidget
                   +----GtkContainer
                         +----GtkBin
                               +----GtkRevealer

## Implemented Interfaces

GtkRevealer implements AtkImplementorIface and GtkBuildable.

## Properties

      "child-revealed"           gboolean              : Read
      "reveal-child"             gboolean              : Read / Write / Construct
      "transition-duration"      guint                 : Read / Write / Construct
      "transition-type"          GtkRevealerTransitionType  : Read / Write / Construct

## Description

The GtkRevealer widget is a container which animates the transition of its child from invisible to visible.

The style of transition can be controlled with `gtk_revealer_set_transition_type()`.

The GtkRevealer widget was added in GTK+ 3.10.

## Details

### struct GtkRevealer

    struct GtkRevealer;

### gtk_revealer_new ()

    GtkWidget *         gtk_revealer_new                    (void);

### gtk_revealer_get_reveal_child ()

    gboolean            gtk_revealer_get_reveal_child       (GtkRevealer *revealer);

Returns whether the child is currently revealed. See `gtk_revealer_set_reveal_child()`.

This function returns `TRUE` as soon as the transition is to the revealed state is started. To learn whether the child is fully revealed (ie the transition is completed), use `gtk_revealer_get_child_revealed()`.

`revealer` : | a GtkRevealer
Returns : | `TRUE` if the child is revealed.

Since 3.10

### gtk_revealer_set_reveal_child ()

    void                gtk_revealer_set_reveal_child       (GtkRevealer *revealer,
                                                             gboolean reveal_child);

Tells the GtkRevealer to reveal or conceal its child.

The transition will be animated with the current transition type of `revealer`.

`revealer` : | a GtkRevealer
`reveal_child` : | `TRUE` to reveal the child

Since 3.10

### gtk_revealer_get_child_revealed ()

    gboolean            gtk_revealer_get_child_revealed     (GtkRevealer *revealer);

Returns whether the child is fully revealed, ie wether the transition to the revealed state is completed.

`revealer` : | a GtkRevealer
Returns : | `TRUE` if the child is fully revealed

Since 3.10

### gtk_revealer_get_transition_duration ()

    guint               gtk_revealer_get_transition_duration
                                                            (GtkRevealer *revealer);

Returns the amount of time (in milliseconds) that transitions will take.

`revealer` : | a GtkRevealer
Returns : | the transition duration

Since 3.10

### gtk_revealer_set_transition_duration ()

    void                gtk_revealer_set_transition_duration
                                                            (GtkRevealer *revealer,
                                                             guint duration);

Sets the duration that transitions will take.

`revealer` : | a GtkRevealer
`duration` : | the new duration, in milliseconds

Since 3.10

### enum GtkRevealerTransitionType

    typedef enum {
      GTK_REVEALER_TRANSITION_TYPE_NONE,
      GTK_REVEALER_TRANSITION_TYPE_CROSSFADE,
      GTK_REVEALER_TRANSITION_TYPE_SLIDE_RIGHT,
      GTK_REVEALER_TRANSITION_TYPE_SLIDE_LEFT,
      GTK_REVEALER_TRANSITION_TYPE_SLIDE_UP,
      GTK_REVEALER_TRANSITION_TYPE_SLIDE_DOWN
    } GtkRevealerTransitionType;

These enumeration values describe the possible transitions when the child of a GtkRevealer widget is shown or hidden.

`GTK_REVEALER_TRANSITION_TYPE_NONE` | No transition
`GTK_REVEALER_TRANSITION_TYPE_CROSSFADE` | Fade in
`GTK_REVEALER_TRANSITION_TYPE_SLIDE_RIGHT` | Slide in from the left
`GTK_REVEALER_TRANSITION_TYPE_SLIDE_LEFT` | Slide in from the right
`GTK_REVEALER_TRANSITION_TYPE_SLIDE_UP` | Slide in from the bottom
`GTK_REVEALER_TRANSITION_TYPE_SLIDE_DOWN` | Slide in from the top

### gtk_revealer_get_transition_type ()

    GtkRevealerTransitionType gtk_revealer_get_transition_type
                                                            (GtkRevealer *revealer);

Gets the type of animation that will be used for transitions in `revealer`.

`revealer` : | a GtkRevealer
Returns : | the current transition type of `revealer`

Since 3.10

### gtk_revealer_set_transition_type ()

    void                gtk_revealer_set_transition_type    (GtkRevealer *revealer,
                                                             GtkRevealerTransitionType transition);

Sets the type of animation that will be used for transitions in `revealer`. Available types include various kinds of fades and slides.

`revealer` : | a GtkRevealer
`transition` : | the new transition type

Since 3.10

## Property Details

### The `"child-revealed"` property

      "child-revealed"           gboolean              : Read

Whether the child is revealed and the animation target reached.

Default value: FALSE

### The `"reveal-child"` property

      "reveal-child"             gboolean              : Read / Write / Construct

Whether the container should reveal the child.

Default value: FALSE

### The `"transition-duration"` property

      "transition-duration"      guint                 : Read / Write / Construct

The animation duration, in milliseconds.

Default value: 250

### The `"transition-type"` property

      "transition-type"          GtkRevealerTransitionType  : Read / Write / Construct

The type of animation used to transition.

Default value: GTK_REVEALER_TRANSITION_TYPE_SLIDE_DOWN

## See Also

GtkExpander